Pileus Git - ~andy/gtk/blob - gtk/gtkcombobox.c

   1 /* gtkcombobox.c
   2  * Copyright (C) 2002, 2003  Kristian Rietveld <kris@gtk.org>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include "config.h"
  21 #include "gtkcombobox.h"
  22 #include "gtkcellareabox.h"
  23 #include "gtktreemenu.h"
  24 #include "gtkarrow.h"
  25 #include "gtkbindings.h"
  26 #include "gtkcelllayout.h"
  27 #include "gtkcellrenderertext.h"
  28 #include "gtkcellview.h"
  29 #include "gtkeventbox.h"
  30 #include "gtkframe.h"
  31 #include "gtkbox.h"
  32 #include "gtkliststore.h"
  33 #include "gtkmain.h"
  34 #include "gtkmenuprivate.h"
  35 #include "gtkmenushellprivate.h"
  36 #include "gtkscrolledwindow.h"
  37 #include "gtkseparatormenuitem.h"
  38 #include "deprecated/gtktearoffmenuitem.h"
  39 #include "gtktogglebutton.h"
  40 #include "gtktreeselection.h"
  41 #include "gtkseparator.h"
  42 #include "gtkwindow.h"
  43 #include "gtktypebuiltins.h"
  44 #include "gtkprivate.h"
  45
  46 #include <gobject/gvaluecollector.h>
  47
  48 #include <string.h>
  49 #include <stdarg.h>
  50
  51 #include "gtkmarshalers.h"
  52 #include "gtkintl.h"
  53
  54 #include "gtkentryprivate.h"
  55 #include "gtktreeprivate.h"
  56 #include "a11y/gtkcomboboxaccessible.h"
  57
  58
  59 /**
  60  * SECTION:gtkcombobox
  61  * @Short_description: A widget used to choose from a list of items
  62  * @Title: GtkComboBox
  63  * @See_also: #GtkComboBoxText, #GtkTreeModel, #GtkCellRenderer
  64  *
  65  * A GtkComboBox is a widget that allows the user to choose from a list of
  66  * valid choices. The GtkComboBox displays the selected choice. When
  67  * activated, the GtkComboBox displays a popup which allows the user to
  68  * make a new choice. The style in which the selected value is displayed,
  69  * and the style of the popup is determined by the current theme. It may
  70  * be similar to a Windows-style combo box.
  71  *
  72  * The GtkComboBox uses the model-view pattern; the list of valid choices
  73  * is specified in the form of a tree model, and the display of the choices
  74  * can be adapted to the data in the model by using cell renderers, as you
  75  * would in a tree view. This is possible since GtkComboBox implements the
  76  * #GtkCellLayout interface. The tree model holding the valid choices is
  77  * not restricted to a flat list, it can be a real tree, and the popup will
  78  * reflect the tree structure.
  79  *
  80  * To allow the user to enter values not in the model, the 'has-entry'
  81  * property allows the GtkComboBox to contain a #GtkEntry. This entry
  82  * can be accessed by calling gtk_bin_get_child() on the combo box.
  83  *
  84  * For a simple list of textual choices, the model-view API of GtkComboBox
  85  * can be a bit overwhelming. In this case, #GtkComboBoxText offers a
  86  * simple alternative. Both GtkComboBox and #GtkComboBoxText can contain
  87  * an entry.
  88  */
  89
  90
  91 /* WELCOME, to THE house of evil code */
  92 struct _GtkComboBoxPrivate
  93 {
  94   GtkTreeModel *model;
  95
  96   GtkCellArea *area;
  97
  98   gint col_column;
  99   gint row_column;
 100
 101   gint wrap_width;
 102   GtkShadowType shadow_type;
 103
 104   gint active; /* Only temporary */
 105   GtkTreeRowReference *active_row;
 106
 107   GtkWidget *tree_view;
 108
 109   GtkWidget *cell_view;
 110   GtkWidget *cell_view_frame;
 111
 112   GtkWidget *button;
 113   GtkWidget *box;
 114   GtkWidget *arrow;
 115   GtkWidget *separator;
 116
 117   GtkWidget *popup_widget;
 118   GtkWidget *popup_window;
 119   GtkWidget *scrolled_window;
 120
 121   gulong inserted_id;
 122   gulong deleted_id;
 123   gulong reordered_id;
 124   gulong changed_id;
 125   guint popup_idle_id;
 126   guint activate_button;
 127   guint32 activate_time;
 128   guint scroll_timer;
 129   guint resize_idle_id;
 130
 131   /* For "has-entry" specific behavior we track
 132    * an automated cell renderer and text column
 133    */
 134   gint  text_column;
 135   GtkCellRenderer *text_renderer;
 136
 137   gint id_column;
 138
 139   guint popup_in_progress : 1;
 140   guint popup_shown : 1;
 141   guint add_tearoffs : 1;
 142   guint has_frame : 1;
 143   guint is_cell_renderer : 1;
 144   guint editing_canceled : 1;
 145   guint auto_scroll : 1;
 146   guint focus_on_click : 1;
 147   guint button_sensitivity : 2;
 148   guint has_entry : 1;
 149   guint popup_fixed_width : 1;
 150
 151   GtkTreeViewRowSeparatorFunc row_separator_func;
 152   gpointer                    row_separator_data;
 153   GDestroyNotify              row_separator_destroy;
 154
 155   GdkDevice *grab_pointer;
 156   GdkDevice *grab_keyboard;
 157
 158   gchar *tearoff_title;
 159 };
 160
 161 /* While debugging this evil code, I have learned that
 162  * there are actually 4 modes to this widget, which can
 163  * be characterized as follows
 164  *
 165  * 1) menu mode, no child added
 166  *
 167  * tree_view -> NULL
 168  * cell_view -> GtkCellView, regular child
 169  * cell_view_frame -> NULL
 170  * button -> GtkToggleButton set_parent to combo
 171  * arrow -> GtkArrow set_parent to button
 172  * separator -> GtkVSepator set_parent to button
 173  * popup_widget -> GtkMenu
 174  * popup_window -> NULL
 175  * scrolled_window -> NULL
 176  *
 177  * 2) menu mode, child added
 178  *
 179  * tree_view -> NULL
 180  * cell_view -> NULL
 181  * cell_view_frame -> NULL
 182  * button -> GtkToggleButton set_parent to combo
 183  * arrow -> GtkArrow, child of button
 184  * separator -> NULL
 185  * popup_widget -> GtkMenu
 186  * popup_window -> NULL
 187  * scrolled_window -> NULL
 188  *
 189  * 3) list mode, no child added
 190  *
 191  * tree_view -> GtkTreeView, child of scrolled_window
 192  * cell_view -> GtkCellView, regular child
 193  * cell_view_frame -> GtkFrame, set parent to combo
 194  * button -> GtkToggleButton, set_parent to combo
 195  * arrow -> GtkArrow, child of button
 196  * separator -> NULL
 197  * popup_widget -> tree_view
 198  * popup_window -> GtkWindow
 199  * scrolled_window -> GtkScrolledWindow, child of popup_window
 200  *
 201  * 4) list mode, child added
 202  *
 203  * tree_view -> GtkTreeView, child of scrolled_window
 204  * cell_view -> NULL
 205  * cell_view_frame -> NULL
 206  * button -> GtkToggleButton, set_parent to combo
 207  * arrow -> GtkArrow, child of button
 208  * separator -> NULL
 209  * popup_widget -> tree_view
 210  * popup_window -> GtkWindow
 211  * scrolled_window -> GtkScrolledWindow, child of popup_window
 212  *
 213  */
 214
 215 enum {
 216   CHANGED,
 217   MOVE_ACTIVE,
 218   POPUP,
 219   POPDOWN,
 220   FORMAT_ENTRY_TEXT,
 221   LAST_SIGNAL
 222 };
 223
 224 enum {
 225   PROP_0,
 226   PROP_MODEL,
 227   PROP_WRAP_WIDTH,
 228   PROP_ROW_SPAN_COLUMN,
 229   PROP_COLUMN_SPAN_COLUMN,
 230   PROP_ACTIVE,
 231   PROP_ADD_TEAROFFS,
 232   PROP_TEAROFF_TITLE,
 233   PROP_HAS_FRAME,
 234   PROP_FOCUS_ON_CLICK,
 235   PROP_POPUP_SHOWN,
 236   PROP_BUTTON_SENSITIVITY,
 237   PROP_EDITING_CANCELED,
 238   PROP_HAS_ENTRY,
 239   PROP_ENTRY_TEXT_COLUMN,
 240   PROP_POPUP_FIXED_WIDTH,
 241   PROP_ID_COLUMN,
 242   PROP_ACTIVE_ID,
 243   PROP_CELL_AREA
 244 };
 245
 246 static guint combo_box_signals[LAST_SIGNAL] = {0,};
 247
 248 #define SCROLL_TIME  100
 249
 250 /* common */
 251
 252 static void     gtk_combo_box_cell_layout_init     (GtkCellLayoutIface *iface);
 253 static void     gtk_combo_box_cell_editable_init   (GtkCellEditableIface *iface);
 254 static GObject *gtk_combo_box_constructor          (GType                  type,
 255                                                     guint                  n_construct_properties,
 256                                                     GObjectConstructParam *construct_properties);
 257 static void     gtk_combo_box_dispose              (GObject          *object);
 258 static void     gtk_combo_box_finalize             (GObject          *object);
 259 static void     gtk_combo_box_destroy              (GtkWidget        *widget);
 260
 261 static void     gtk_combo_box_set_property         (GObject         *object,
 262                                                     guint            prop_id,
 263                                                     const GValue    *value,
 264                                                     GParamSpec      *spec);
 265 static void     gtk_combo_box_get_property         (GObject         *object,
 266                                                     guint            prop_id,
 267                                                     GValue          *value,
 268                                                     GParamSpec      *spec);
 269
 270 static void     gtk_combo_box_state_flags_changed  (GtkWidget       *widget,
 271                                                     GtkStateFlags    previous);
 272 static void     gtk_combo_box_grab_focus           (GtkWidget       *widget);
 273 static void     gtk_combo_box_style_updated        (GtkWidget       *widget);
 274 static void     gtk_combo_box_button_toggled       (GtkWidget       *widget,
 275                                                     gpointer         data);
 276 static void     gtk_combo_box_button_state_flags_changed (GtkWidget     *widget,
 277                                                           GtkStateFlags  previous,
 278                                                           gpointer       data);
 279 static void     gtk_combo_box_add                  (GtkContainer    *container,
 280                                                     GtkWidget       *widget);
 281 static void     gtk_combo_box_remove               (GtkContainer    *container,
 282                                                     GtkWidget       *widget);
 283
 284 static void     gtk_combo_box_menu_show            (GtkWidget        *menu,
 285                                                     gpointer          user_data);
 286 static void     gtk_combo_box_menu_hide            (GtkWidget        *menu,
 287                                                     gpointer          user_data);
 288
 289 static void     gtk_combo_box_set_popup_widget     (GtkComboBox      *combo_box,
 290                                                     GtkWidget        *popup);
 291 static void     gtk_combo_box_menu_position_below  (GtkMenu          *menu,
 292                                                     gint             *x,
 293                                                     gint             *y,
 294                                                     gint             *push_in,
 295                                                     gpointer          user_data);
 296 static void     gtk_combo_box_menu_position_over   (GtkMenu          *menu,
 297                                                     gint             *x,
 298                                                     gint             *y,
 299                                                     gint             *push_in,
 300                                                     gpointer          user_data);
 301 static void     gtk_combo_box_menu_position        (GtkMenu          *menu,
 302                                                     gint             *x,
 303                                                     gint             *y,
 304                                                     gint             *push_in,
 305                                                     gpointer          user_data);
 306
 307 static void     gtk_combo_box_unset_model          (GtkComboBox      *combo_box);
 308
 309 static void     gtk_combo_box_size_allocate        (GtkWidget        *widget,
 310                                                     GtkAllocation    *allocation);
 311 static void     gtk_combo_box_forall               (GtkContainer     *container,
 312                                                     gboolean          include_internals,
 313                                                     GtkCallback       callback,
 314                                                     gpointer          callback_data);
 315 static gboolean gtk_combo_box_draw                 (GtkWidget        *widget,
 316                                                     cairo_t          *cr);
 317 static gboolean gtk_combo_box_scroll_event         (GtkWidget        *widget,
 318                                                     GdkEventScroll   *event);
 319 static void     gtk_combo_box_set_active_internal  (GtkComboBox      *combo_box,
 320                                                     GtkTreePath      *path);
 321
 322 static void     gtk_combo_box_check_appearance     (GtkComboBox      *combo_box);
 323 static void     gtk_combo_box_real_move_active     (GtkComboBox      *combo_box,
 324                                                     GtkScrollType     scroll);
 325 static void     gtk_combo_box_real_popup           (GtkComboBox      *combo_box);
 326 static gboolean gtk_combo_box_real_popdown         (GtkComboBox      *combo_box);
 327
 328 /* listening to the model */
 329 static void     gtk_combo_box_model_row_inserted   (GtkTreeModel     *model,
 330                                                     GtkTreePath      *path,
 331                                                     GtkTreeIter      *iter,
 332                                                     gpointer          user_data);
 333 static void     gtk_combo_box_model_row_deleted    (GtkTreeModel     *model,
 334                                                     GtkTreePath      *path,
 335                                                     gpointer          user_data);
 336 static void     gtk_combo_box_model_rows_reordered (GtkTreeModel     *model,
 337                                                     GtkTreePath      *path,
 338                                                     GtkTreeIter      *iter,
 339                                                     gint             *new_order,
 340                                                     gpointer          user_data);
 341 static void     gtk_combo_box_model_row_changed    (GtkTreeModel     *model,
 342                                                     GtkTreePath      *path,
 343                                                     GtkTreeIter      *iter,
 344                                                     gpointer          data);
 345 static void     gtk_combo_box_model_row_expanded   (GtkTreeModel     *model,
 346                                                     GtkTreePath      *path,
 347                                                     GtkTreeIter      *iter,
 348                                                     gpointer          data);
 349
 350 /* list */
 351 static void     gtk_combo_box_list_position        (GtkComboBox      *combo_box,
 352                                                     gint             *x,
 353                                                     gint             *y,
 354                                                     gint             *width,
 355                                                     gint             *height);
 356 static void     gtk_combo_box_list_setup           (GtkComboBox      *combo_box);
 357 static void     gtk_combo_box_list_destroy         (GtkComboBox      *combo_box);
 358
 359 static gboolean gtk_combo_box_list_button_released (GtkWidget        *widget,
 360                                                     GdkEventButton   *event,
 361                                                     gpointer          data);
 362 static gboolean gtk_combo_box_list_key_press       (GtkWidget        *widget,
 363                                                     GdkEventKey      *event,
 364                                                     gpointer          data);
 365 static gboolean gtk_combo_box_list_enter_notify    (GtkWidget        *widget,
 366                                                     GdkEventCrossing *event,
 367                                                     gpointer          data);
 368 static void     gtk_combo_box_list_auto_scroll     (GtkComboBox   *combo,
 369                                                     gint           x,
 370                                                     gint           y);
 371 static gboolean gtk_combo_box_list_scroll_timeout  (GtkComboBox   *combo);
 372 static gboolean gtk_combo_box_list_button_pressed  (GtkWidget        *widget,
 373                                                     GdkEventButton   *event,
 374                                                     gpointer          data);
 375
 376 static gboolean gtk_combo_box_list_select_func     (GtkTreeSelection *selection,
 377                                                     GtkTreeModel     *model,
 378                                                     GtkTreePath      *path,
 379                                                     gboolean          path_currently_selected,
 380                                                     gpointer          data);
 381
 382 static void     gtk_combo_box_list_row_changed     (GtkTreeModel     *model,
 383                                                     GtkTreePath      *path,
 384                                                     GtkTreeIter      *iter,
 385                                                     gpointer          data);
 386 static void     gtk_combo_box_list_popup_resize    (GtkComboBox      *combo_box);
 387
 388 /* menu */
 389 static void     gtk_combo_box_menu_setup           (GtkComboBox      *combo_box,
 390                                                     gboolean          add_children);
 391 static void     gtk_combo_box_update_title         (GtkComboBox      *combo_box);
 392 static void     gtk_combo_box_menu_destroy         (GtkComboBox      *combo_box);
 393
 394
 395 static gboolean gtk_combo_box_menu_button_press    (GtkWidget        *widget,
 396                                                     GdkEventButton   *event,
 397                                                     gpointer          user_data);
 398 static void     gtk_combo_box_menu_activate        (GtkWidget        *menu,
 399                                                     const gchar      *path,
 400                                                     GtkComboBox      *combo_box);
 401 static void     gtk_combo_box_update_sensitivity   (GtkComboBox      *combo_box);
 402 static gboolean gtk_combo_box_menu_key_press       (GtkWidget        *widget,
 403                                                     GdkEventKey      *event,
 404                                                     gpointer          data);
 405 static void     gtk_combo_box_menu_popup           (GtkComboBox      *combo_box,
 406                                                     guint             button,
 407                                                     guint32           activate_time);
 408
 409 /* cell layout */
 410 static GtkCellArea *gtk_combo_box_cell_layout_get_area       (GtkCellLayout    *cell_layout);
 411
 412 static gboolean gtk_combo_box_mnemonic_activate              (GtkWidget    *widget,
 413                                                               gboolean      group_cycling);
 414
 415 static void     gtk_combo_box_child_show                     (GtkWidget       *widget,
 416                                                               GtkComboBox     *combo_box);
 417 static void     gtk_combo_box_child_hide                     (GtkWidget       *widget,
 418                                                               GtkComboBox     *combo_box);
 419
 420 /* GtkComboBox:has-entry callbacks */
 421 static void     gtk_combo_box_entry_contents_changed         (GtkEntry        *entry,
 422                                                               gpointer         user_data);
 423 static void     gtk_combo_box_entry_active_changed           (GtkComboBox     *combo_box,
 424                                                               gpointer         user_data);
 425 static gchar   *gtk_combo_box_format_entry_text              (GtkComboBox     *combo_box,
 426                                                               const gchar     *path);
 427
 428 /* GtkBuildable method implementation */
 429 static GtkBuildableIface *parent_buildable_iface;
 430
 431 static void     gtk_combo_box_buildable_init                 (GtkBuildableIface *iface);
 432 static gboolean gtk_combo_box_buildable_custom_tag_start     (GtkBuildable  *buildable,
 433                                                               GtkBuilder    *builder,
 434                                                               GObject       *child,
 435                                                               const gchar   *tagname,
 436                                                               GMarkupParser *parser,
 437                                                               gpointer      *data);
 438 static void     gtk_combo_box_buildable_custom_tag_end       (GtkBuildable  *buildable,
 439                                                               GtkBuilder    *builder,
 440                                                               GObject       *child,
 441                                                               const gchar   *tagname,
 442                                                               gpointer      *data);
 443 static GObject *gtk_combo_box_buildable_get_internal_child   (GtkBuildable *buildable,
 444                                                               GtkBuilder   *builder,
 445                                                               const gchar  *childname);
 446
 447
 448 /* GtkCellEditable method implementations */
 449 static void     gtk_combo_box_start_editing                  (GtkCellEditable *cell_editable,
 450                                                               GdkEvent        *event);
 451
 452 static void     gtk_combo_box_get_preferred_width            (GtkWidget    *widget,
 453                                                               gint         *minimum_size,
 454                                                               gint         *natural_size);
 455 static void     gtk_combo_box_get_preferred_height           (GtkWidget    *widget,
 456                                                               gint         *minimum_size,
 457                                                               gint         *natural_size);
 458 static void     gtk_combo_box_get_preferred_width_for_height (GtkWidget    *widget,
 459                                                               gint          avail_size,
 460                                                               gint         *minimum_size,
 461                                                               gint         *natural_size);
 462 static void     gtk_combo_box_get_preferred_height_for_width (GtkWidget    *widget,
 463                                                               gint          avail_size,
 464                                                               gint         *minimum_size,
 465                                                               gint         *natural_size);
 466 static GtkWidgetPath *gtk_combo_box_get_path_for_child       (GtkContainer *container,
 467                                                               GtkWidget    *child);
 468 static void     gtk_combo_box_direction_changed              (GtkWidget    *widget,
 469                                                               GtkTextDirection  previous_direction);
 470
 471 G_DEFINE_TYPE_WITH_CODE (GtkComboBox, gtk_combo_box, GTK_TYPE_BIN,
 472                          G_IMPLEMENT_INTERFACE (GTK_TYPE_CELL_LAYOUT,
 473                                                 gtk_combo_box_cell_layout_init)
 474                          G_IMPLEMENT_INTERFACE (GTK_TYPE_CELL_EDITABLE,
 475                                                 gtk_combo_box_cell_editable_init)
 476                          G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
 477                                                 gtk_combo_box_buildable_init))
 478
 479
 480 /* common */
 481 static void
 482 gtk_combo_box_class_init (GtkComboBoxClass *klass)
 483 {
 484   GObjectClass *object_class;
 485   GtkContainerClass *container_class;
 486   GtkWidgetClass *widget_class;
 487   GtkBindingSet *binding_set;
 488
 489   container_class = (GtkContainerClass *)klass;
 490   container_class->forall = gtk_combo_box_forall;
 491   container_class->add = gtk_combo_box_add;
 492   container_class->remove = gtk_combo_box_remove;
 493   container_class->get_path_for_child = gtk_combo_box_get_path_for_child;
 494
 495   widget_class = (GtkWidgetClass *)klass;
 496   widget_class->size_allocate = gtk_combo_box_size_allocate;
 497   widget_class->draw = gtk_combo_box_draw;
 498   widget_class->scroll_event = gtk_combo_box_scroll_event;
 499   widget_class->mnemonic_activate = gtk_combo_box_mnemonic_activate;
 500   widget_class->grab_focus = gtk_combo_box_grab_focus;
 501   widget_class->style_updated = gtk_combo_box_style_updated;
 502   widget_class->state_flags_changed = gtk_combo_box_state_flags_changed;
 503   widget_class->get_preferred_width = gtk_combo_box_get_preferred_width;
 504   widget_class->get_preferred_height = gtk_combo_box_get_preferred_height;
 505   widget_class->get_preferred_height_for_width = gtk_combo_box_get_preferred_height_for_width;
 506   widget_class->get_preferred_width_for_height = gtk_combo_box_get_preferred_width_for_height;
 507   widget_class->destroy = gtk_combo_box_destroy;
 508   widget_class->direction_changed = gtk_combo_box_direction_changed;
 509
 510   object_class = (GObjectClass *)klass;
 511   object_class->constructor = gtk_combo_box_constructor;
 512   object_class->dispose = gtk_combo_box_dispose;
 513   object_class->finalize = gtk_combo_box_finalize;
 514   object_class->set_property = gtk_combo_box_set_property;
 515   object_class->get_property = gtk_combo_box_get_property;
 516
 517   klass->format_entry_text = gtk_combo_box_format_entry_text;
 518
 519   /* signals */
 520   /**
 521    * GtkComboBox::changed:
 522    * @widget: the object which received the signal
 523    *
 524    * The changed signal is emitted when the active
 525    * item is changed. The can be due to the user selecting
 526    * a different item from the list, or due to a
 527    * call to gtk_combo_box_set_active_iter().
 528    * It will also be emitted while typing into the entry of a combo box
 529    * with an entry.
 530    *
 531    * Since: 2.4
 532    */
 533   combo_box_signals[CHANGED] =
 534     g_signal_new (I_("changed"),
 535                   G_OBJECT_CLASS_TYPE (klass),
 536                   G_SIGNAL_RUN_LAST,
 537                   G_STRUCT_OFFSET (GtkComboBoxClass, changed),
 538                   NULL, NULL,
 539                   g_cclosure_marshal_VOID__VOID,
 540                   G_TYPE_NONE, 0);
 541   /**
 542    * GtkComboBox::move-active:
 543    * @widget: the object that received the signal
 544    * @scroll_type: a #GtkScrollType
 545    *
 546    * The ::move-active signal is a
 547    * <link linkend="keybinding-signals">keybinding signal</link>
 548    * which gets emitted to move the active selection.
 549    *
 550    * Since: 2.12
 551    */
 552   combo_box_signals[MOVE_ACTIVE] =
 553     g_signal_new_class_handler (I_("move-active"),
 554                                 G_OBJECT_CLASS_TYPE (klass),
 555                                 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 556                                 G_CALLBACK (gtk_combo_box_real_move_active),
 557                                 NULL, NULL,
 558                                 g_cclosure_marshal_VOID__ENUM,
 559                                 G_TYPE_NONE, 1,
 560                                 GTK_TYPE_SCROLL_TYPE);
 561
 562   /**
 563    * GtkComboBox::popup:
 564    * @widget: the object that received the signal
 565    *
 566    * The ::popup signal is a
 567    * <link linkend="keybinding-signals">keybinding signal</link>
 568    * which gets emitted to popup the combo box list.
 569    *
 570    * The default binding for this signal is Alt+Down.
 571    *
 572    * Since: 2.12
 573    */
 574   combo_box_signals[POPUP] =
 575     g_signal_new_class_handler (I_("popup"),
 576                                 G_OBJECT_CLASS_TYPE (klass),
 577                                 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 578                                 G_CALLBACK (gtk_combo_box_real_popup),
 579                                 NULL, NULL,
 580                                 g_cclosure_marshal_VOID__VOID,
 581                                 G_TYPE_NONE, 0);
 582   /**
 583    * GtkComboBox::popdown:
 584    * @button: the object which received the signal
 585    *
 586    * The ::popdown signal is a
 587    * <link linkend="keybinding-signals">keybinding signal</link>
 588    * which gets emitted to popdown the combo box list.
 589    *
 590    * The default bindings for this signal are Alt+Up and Escape.
 591    *
 592    * Since: 2.12
 593    */
 594   combo_box_signals[POPDOWN] =
 595     g_signal_new_class_handler (I_("popdown"),
 596                                 G_OBJECT_CLASS_TYPE (klass),
 597                                 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 598                                 G_CALLBACK (gtk_combo_box_real_popdown),
 599                                 NULL, NULL,
 600                                 _gtk_marshal_BOOLEAN__VOID,
 601                                 G_TYPE_BOOLEAN, 0);
 602
 603   /**
 604    * GtkComboBox::format-entry-text:
 605    * @combo: the object which received the signal
 606    * @path: the GtkTreePath string from the combo box's current model to format text for
 607    *
 608    * For combo boxes that are created with an entry (See GtkComboBox:has-entry).
 609    *
 610    * A signal which allows you to change how the text displayed in a combo box's
 611    * entry is displayed.
 612    *
 613    * Connect a signal handler which returns an allocated string representing
 614    * @path. That string will then be used to set the text in the combo box's entry.
 615    * The default signal handler uses the text from the GtkComboBox::entry-text-column
 616    * model column.
 617    *
 618    * Here's an example signal handler which fetches data from the model and
 619    * displays it in the entry.
 620    * |[
 621    * static gchar*
 622    * format_entry_text_callback (GtkComboBox *combo,
 623    *                             const gchar *path,
 624    *                             gpointer     user_data)
 625    * {
 626    *   GtkTreeIter iter;
 627    *   GtkTreeModel model;
 628    *   gdouble      value;
 629    *
 630    *   model = gtk_combo_box_get_model (combo);
 631    *
 632    *   gtk_tree_model_get_iter_from_string (model, &iter, path);
 633    *   gtk_tree_model_get (model, &iter,
 634    *                       THE_DOUBLE_VALUE_COLUMN, &value,
 635    *                       -1);
 636    *
 637    *   return g_strdup_printf ("&percnt;g", value);
 638    * }
 639    * ]|
 640    *
 641    * Return value: (transfer full): a newly allocated string representing @path
 642    * for the current GtkComboBox model.
 643    *
 644    * Since: 3.4
 645    */
 646   combo_box_signals[FORMAT_ENTRY_TEXT] =
 647     g_signal_new (I_("format-entry-text"),
 648                   G_TYPE_FROM_CLASS (klass),
 649                   G_SIGNAL_RUN_LAST,
 650                   G_STRUCT_OFFSET (GtkComboBoxClass, format_entry_text),
 651                   _gtk_single_string_accumulator, NULL,
 652                   _gtk_marshal_STRING__STRING,
 653                   G_TYPE_STRING, 1, G_TYPE_STRING);
 654
 655   /* key bindings */
 656   binding_set = gtk_binding_set_by_class (widget_class);
 657
 658   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Down, GDK_MOD1_MASK,
 659                                 "popup", 0);
 660   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Down, GDK_MOD1_MASK,
 661                                 "popup", 0);
 662
 663   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Up, GDK_MOD1_MASK,
 664                                 "popdown", 0);
 665   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Up, GDK_MOD1_MASK,
 666                                 "popdown", 0);
 667   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Escape, 0,
 668                                 "popdown", 0);
 669
 670   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Up, 0,
 671                                 "move-active", 1,
 672                                 GTK_TYPE_SCROLL_TYPE, GTK_SCROLL_STEP_UP);
 673   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Up, 0,
 674                                 "move-active", 1,
 675                                 GTK_TYPE_SCROLL_TYPE, GTK_SCROLL_STEP_UP);
 676   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Page_Up, 0,
 677                                 "move-active", 1,
 678                                 GTK_TYPE_SCROLL_TYPE, GTK_SCROLL_PAGE_UP);
 679   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Page_Up, 0,
 680                                 "move-active", 1,
 681                                 GTK_TYPE_SCROLL_TYPE, GTK_SCROLL_PAGE_UP);
 682   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Home, 0,
 683                                 "move-active", 1,
 684                                 GTK_TYPE_SCROLL_TYPE, GTK_SCROLL_START);
 685   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Home, 0,
 686                                 "move-active", 1,
 687                                 GTK_TYPE_SCROLL_TYPE, GTK_SCROLL_START);
 688
 689   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Down, 0,
 690                                 "move-active", 1,
 691                                 GTK_TYPE_SCROLL_TYPE, GTK_SCROLL_STEP_DOWN);
 692   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Down, 0,
 693                                 "move-active", 1,
 694                                 GTK_TYPE_SCROLL_TYPE, GTK_SCROLL_STEP_DOWN);
 695   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Page_Down, 0,
 696                                 "move-active", 1,
 697                                 GTK_TYPE_SCROLL_TYPE, GTK_SCROLL_PAGE_DOWN);
 698   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Page_Down, 0,
 699                                 "move-active", 1,
 700                                 GTK_TYPE_SCROLL_TYPE, GTK_SCROLL_PAGE_DOWN);
 701   gtk_binding_entry_add_signal (binding_set, GDK_KEY_End, 0,
 702                                 "move-active", 1,
 703                                 GTK_TYPE_SCROLL_TYPE, GTK_SCROLL_END);
 704   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_End, 0,
 705                                 "move-active", 1,
 706                                 GTK_TYPE_SCROLL_TYPE, GTK_SCROLL_END);
 707
 708   /* properties */
 709   g_object_class_override_property (object_class,
 710                                     PROP_EDITING_CANCELED,
 711                                     "editing-canceled");
 712
 713   /**
 714    * GtkComboBox:model:
 715    *
 716    * The model from which the combo box takes the values shown
 717    * in the list.
 718    *
 719    * Since: 2.4
 720    */
 721   g_object_class_install_property (object_class,
 722                                    PROP_MODEL,
 723                                    g_param_spec_object ("model",
 724                                                         P_("ComboBox model"),
 725                                                         P_("The model for the combo box"),
 726                                                         GTK_TYPE_TREE_MODEL,
 727                                                         GTK_PARAM_READWRITE));
 728
 729   /**
 730    * GtkComboBox:wrap-width:
 731    *
 732    * If wrap-width is set to a positive value, the list will be
 733    * displayed in multiple columns, the number of columns is
 734    * determined by wrap-width.
 735    *
 736    * Since: 2.4
 737    */
 738   g_object_class_install_property (object_class,
 739                                    PROP_WRAP_WIDTH,
 740                                    g_param_spec_int ("wrap-width",
 741                                                      P_("Wrap width"),
 742                                                      P_("Wrap width for laying out the items in a grid"),
 743                                                      0,
 744                                                      G_MAXINT,
 745                                                      0,
 746                                                      GTK_PARAM_READWRITE));
 747
 748
 749   /**
 750    * GtkComboBox:row-span-column:
 751    *
 752    * If this is set to a non-negative value, it must be the index of a column
 753    * of type %G_TYPE_INT in the model.
 754    *
 755    * The values of that column are used to determine how many rows a value in
 756    * the list will span. Therefore, the values in the model column pointed to
 757    * by this property must be greater than zero and not larger than wrap-width.
 758    *
 759    * Since: 2.4
 760    */
 761   g_object_class_install_property (object_class,
 762                                    PROP_ROW_SPAN_COLUMN,
 763                                    g_param_spec_int ("row-span-column",
 764                                                      P_("Row span column"),
 765                                                      P_("TreeModel column containing the row span values"),
 766                                                      -1,
 767                                                      G_MAXINT,
 768                                                      -1,
 769                                                      GTK_PARAM_READWRITE));
 770
 771
 772   /**
 773    * GtkComboBox:column-span-column:
 774    *
 775    * If this is set to a non-negative value, it must be the index of a column
 776    * of type %G_TYPE_INT in the model.
 777    *
 778    * The values of that column are used to determine how many columns a value
 779    * in the list will span.
 780    *
 781    * Since: 2.4
 782    */
 783   g_object_class_install_property (object_class,
 784                                    PROP_COLUMN_SPAN_COLUMN,
 785                                    g_param_spec_int ("column-span-column",
 786                                                      P_("Column span column"),
 787                                                      P_("TreeModel column containing the column span values"),
 788                                                      -1,
 789                                                      G_MAXINT,
 790                                                      -1,
 791                                                      GTK_PARAM_READWRITE));
 792
 793
 794   /**
 795    * GtkComboBox:active:
 796    *
 797    * The item which is currently active. If the model is a non-flat treemodel,
 798    * and the active item is not an immediate child of the root of the tree,
 799    * this property has the value
 800    * <literal>gtk_tree_path_get_indices (path)[0]</literal>,
 801    * where <literal>path</literal> is the #GtkTreePath of the active item.
 802    *
 803    * Since: 2.4
 804    */
 805   g_object_class_install_property (object_class,
 806                                    PROP_ACTIVE,
 807                                    g_param_spec_int ("active",
 808                                                      P_("Active item"),
 809                                                      P_("The item which is currently active"),
 810                                                      -1,
 811                                                      G_MAXINT,
 812                                                      -1,
 813                                                      GTK_PARAM_READWRITE));
 814
 815   /**
 816    * GtkComboBox:add-tearoffs:
 817    *
 818    * The add-tearoffs property controls whether generated menus
 819    * have tearoff menu items.
 820    *
 821    * Note that this only affects menu style combo boxes.
 822    *
 823    * Since: 2.6
 824    */
 825   g_object_class_install_property (object_class,
 826                                    PROP_ADD_TEAROFFS,
 827                                    g_param_spec_boolean ("add-tearoffs",
 828                                                          P_("Add tearoffs to menus"),
 829                                                          P_("Whether dropdowns should have a tearoff menu item"),
 830                                                          FALSE,
 831                                                          GTK_PARAM_READWRITE));
 832
 833   /**
 834    * GtkComboBox:has-frame:
 835    *
 836    * The has-frame property controls whether a frame
 837    * is drawn around the entry.
 838    *
 839    * Since: 2.6
 840    */
 841   g_object_class_install_property (object_class,
 842                                    PROP_HAS_FRAME,
 843                                    g_param_spec_boolean ("has-frame",
 844                                                          P_("Has Frame"),
 845                                                          P_("Whether the combo box draws a frame around the child"),
 846                                                          TRUE,
 847                                                          GTK_PARAM_READWRITE));
 848
 849   g_object_class_install_property (object_class,
 850                                    PROP_FOCUS_ON_CLICK,
 851                                    g_param_spec_boolean ("focus-on-click",
 852                                                          P_("Focus on click"),
 853                                                          P_("Whether the combo box grabs focus when it is clicked with the mouse"),
 854                                                          TRUE,
 855                                                          GTK_PARAM_READWRITE));
 856
 857   /**
 858    * GtkComboBox:tearoff-title:
 859    *
 860    * A title that may be displayed by the window manager
 861    * when the popup is torn-off.
 862    *
 863    * Since: 2.10
 864    */
 865   g_object_class_install_property (object_class,
 866                                    PROP_TEAROFF_TITLE,
 867                                    g_param_spec_string ("tearoff-title",
 868                                                         P_("Tearoff Title"),
 869                                                         P_("A title that may be displayed by the window manager when the popup is torn-off"),
 870                                                         NULL,
 871                                                         GTK_PARAM_READWRITE));
 872
 873
 874   /**
 875    * GtkComboBox:popup-shown:
 876    *
 877    * Whether the combo boxes dropdown is popped up.
 878    * Note that this property is mainly useful, because
 879    * it allows you to connect to notify::popup-shown.
 880    *
 881    * Since: 2.10
 882    */
 883   g_object_class_install_property (object_class,
 884                                    PROP_POPUP_SHOWN,
 885                                    g_param_spec_boolean ("popup-shown",
 886                                                          P_("Popup shown"),
 887                                                          P_("Whether the combo's dropdown is shown"),
 888                                                          FALSE,
 889                                                          GTK_PARAM_READABLE));
 890
 891
 892    /**
 893     * GtkComboBox:button-sensitivity:
 894     *
 895     * Whether the dropdown button is sensitive when
 896     * the model is empty.
 897     *
 898     * Since: 2.14
 899     */
 900    g_object_class_install_property (object_class,
 901                                     PROP_BUTTON_SENSITIVITY,
 902                                     g_param_spec_enum ("button-sensitivity",
 903                                                        P_("Button Sensitivity"),
 904                                                        P_("Whether the dropdown button is sensitive when the model is empty"),
 905                                                        GTK_TYPE_SENSITIVITY_TYPE,
 906                                                        GTK_SENSITIVITY_AUTO,
 907                                                        GTK_PARAM_READWRITE));
 908
 909    /**
 910     * GtkComboBox:has-entry:
 911     *
 912     * Whether the combo box has an entry.
 913     *
 914     * Since: 2.24
 915     */
 916    g_object_class_install_property (object_class,
 917                                     PROP_HAS_ENTRY,
 918                                     g_param_spec_boolean ("has-entry",
 919                                                           P_("Has Entry"),
 920                                                           P_("Whether combo box has an entry"),
 921                                                           FALSE,
 922                                                           GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
 923
 924    /**
 925     * GtkComboBox:entry-text-column:
 926     *
 927     * The column in the combo box's model to associate with strings from the entry
 928     * if the combo was created with #GtkComboBox:has-entry = %TRUE.
 929     *
 930     * Since: 2.24
 931     */
 932    g_object_class_install_property (object_class,
 933                                     PROP_ENTRY_TEXT_COLUMN,
 934                                     g_param_spec_int ("entry-text-column",
 935                                                       P_("Entry Text Column"),
 936                                                       P_("The column in the combo box's model to associate "
 937                                                          "with strings from the entry if the combo was "
 938                                                          "created with #GtkComboBox:has-entry = %TRUE"),
 939                                                       -1, G_MAXINT, -1,
 940                                                       GTK_PARAM_READWRITE));
 941
 942    /**
 943     * GtkComboBox:id-column:
 944     *
 945     * The column in the combo box's model that provides string
 946     * IDs for the values in the model, if != -1.
 947     *
 948     * Since: 3.0
 949     */
 950    g_object_class_install_property (object_class,
 951                                     PROP_ID_COLUMN,
 952                                     g_param_spec_int ("id-column",
 953                                                       P_("ID Column"),
 954                                                       P_("The column in the combo box's model that provides "
 955                                                       "string IDs for the values in the model"),
 956                                                       -1, G_MAXINT, -1,
 957                                                       GTK_PARAM_READWRITE));
 958
 959    /**
 960     * GtkComboBox:active-id:
 961     *
 962     * The value of the ID column of the active row.
 963     *
 964     * Since: 3.0
 965     */
 966    g_object_class_install_property (object_class,
 967                                     PROP_ACTIVE_ID,
 968                                     g_param_spec_string ("active-id",
 969                                                          P_("Active id"),
 970                                                          P_("The value of the id column "
 971                                                          "for the active row"),
 972                                                          NULL, GTK_PARAM_READWRITE));
 973
 974    /**
 975     * GtkComboBox:popup-fixed-width:
 976     *
 977     * Whether the popup's width should be a fixed width matching the
 978     * allocated width of the combo box.
 979     *
 980     * Since: 3.0
 981     */
 982    g_object_class_install_property (object_class,
 983                                     PROP_POPUP_FIXED_WIDTH,
 984                                     g_param_spec_boolean ("popup-fixed-width",
 985                                                           P_("Popup Fixed Width"),
 986                                                           P_("Whether the popup's width should be a "
 987                                                              "fixed width matching the allocated width "
 988                                                              "of the combo box"),
 989                                                           TRUE,
 990                                                           GTK_PARAM_READWRITE));
 991
 992    /**
 993     * GtkComboBox:cell-area:
 994     *
 995     * The #GtkCellArea used to layout cell renderers for this combo box.
 996     *
 997     * If no area is specified when creating the combo box with gtk_combo_box_new_with_area()
 998     * a horizontally oriented #GtkCellAreaBox will be used.
 999     *
1000     * Since: 3.0
1001     */
1002    g_object_class_install_property (object_class,
1003                                     PROP_CELL_AREA,
1004                                     g_param_spec_object ("cell-area",
1005                                                          P_("Cell Area"),
1006                                                          P_("The GtkCellArea used to layout cells"),
1007                                                          GTK_TYPE_CELL_AREA,
1008                                                          GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
1009
1010   gtk_widget_class_install_style_property (widget_class,
1011                                            g_param_spec_boolean ("appears-as-list",
1012                                                                  P_("Appears as list"),
1013                                                                  P_("Whether dropdowns should look like lists rather than menus"),
1014                                                                  FALSE,
1015                                                                  GTK_PARAM_READABLE));
1016
1017   /**
1018    * GtkComboBox:arrow-size:
1019    *
1020    * Sets the minimum size of the arrow in the combo box.  Note
1021    * that the arrow size is coupled to the font size, so in case
1022    * a larger font is used, the arrow will be larger than set
1023    * by arrow size.
1024    *
1025    * Since: 2.12
1026    */
1027   gtk_widget_class_install_style_property (widget_class,
1028                                            g_param_spec_int ("arrow-size",
1029                                                              P_("Arrow Size"),
1030                                                              P_("The minimum size of the arrow in the combo box"),
1031                                                              0,
1032                                                              G_MAXINT,
1033                                                              15,
1034                                                              GTK_PARAM_READABLE));
1035
1036   /**
1037    * GtkComboBox:arrow-scaling:
1038    *
1039    * Sets the amount of space used up by the combobox arrow,
1040    * proportional to the font size.
1041    *
1042    * Since: 3.2
1043    */
1044   gtk_widget_class_install_style_property (widget_class,
1045                                            g_param_spec_float ("arrow-scaling",
1046                                                                P_("Arrow Scaling"),
1047                                                                P_("The amount of space used by the arrow"),
1048                                                              0,
1049                                                              2.0,
1050                                                              1.0,
1051                                                              GTK_PARAM_READABLE));
1052
1053   /**
1054    * GtkComboBox:shadow-type:
1055    *
1056    * Which kind of shadow to draw around the combo box.
1057    *
1058    * Since: 2.12
1059    */
1060   gtk_widget_class_install_style_property (widget_class,
1061                                            g_param_spec_enum ("shadow-type",
1062                                                               P_("Shadow type"),
1063                                                               P_("Which kind of shadow to draw around the combo box"),
1064                                                               GTK_TYPE_SHADOW_TYPE,
1065                                                               GTK_SHADOW_NONE,
1066                                                               GTK_PARAM_READABLE));
1067
1068   g_type_class_add_private (object_class, sizeof (GtkComboBoxPrivate));
1069
1070   gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_COMBO_BOX_ACCESSIBLE);
1071 }
1072
1073 static void
1074 gtk_combo_box_buildable_init (GtkBuildableIface *iface)
1075 {
1076   parent_buildable_iface = g_type_interface_peek_parent (iface);
1077   iface->add_child = _gtk_cell_layout_buildable_add_child;
1078   iface->custom_tag_start = gtk_combo_box_buildable_custom_tag_start;
1079   iface->custom_tag_end = gtk_combo_box_buildable_custom_tag_end;
1080   iface->get_internal_child = gtk_combo_box_buildable_get_internal_child;
1081 }
1082
1083 static void
1084 gtk_combo_box_cell_layout_init (GtkCellLayoutIface *iface)
1085 {
1086   iface->get_area = gtk_combo_box_cell_layout_get_area;
1087 }
1088
1089 static void
1090 gtk_combo_box_cell_editable_init (GtkCellEditableIface *iface)
1091 {
1092   iface->start_editing = gtk_combo_box_start_editing;
1093 }
1094
1095 static void
1096 gtk_combo_box_init (GtkComboBox *combo_box)
1097 {
1098   GtkComboBoxPrivate *priv;
1099
1100   combo_box->priv = G_TYPE_INSTANCE_GET_PRIVATE (combo_box,
1101                                                  GTK_TYPE_COMBO_BOX,
1102                                                  GtkComboBoxPrivate);
1103   priv = combo_box->priv;
1104
1105   priv->wrap_width = 0;
1106
1107   priv->active = -1;
1108   priv->active_row = NULL;
1109   priv->col_column = -1;
1110   priv->row_column = -1;
1111
1112   priv->popup_shown = FALSE;
1113   priv->add_tearoffs = FALSE;
1114   priv->has_frame = TRUE;
1115   priv->is_cell_renderer = FALSE;
1116   priv->editing_canceled = FALSE;
1117   priv->auto_scroll = FALSE;
1118   priv->focus_on_click = TRUE;
1119   priv->button_sensitivity = GTK_SENSITIVITY_AUTO;
1120   priv->has_entry = FALSE;
1121   priv->popup_fixed_width = TRUE;
1122
1123   priv->text_column = -1;
1124   priv->text_renderer = NULL;
1125   priv->id_column = -1;
1126 }
1127
1128 static void
1129 gtk_combo_box_set_property (GObject      *object,
1130                             guint         prop_id,
1131                             const GValue *value,
1132                             GParamSpec   *pspec)
1133 {
1134   GtkComboBox *combo_box = GTK_COMBO_BOX (object);
1135   GtkComboBoxPrivate *priv = combo_box->priv;
1136   GtkCellArea *area;
1137
1138   switch (prop_id)
1139     {
1140     case PROP_MODEL:
1141       gtk_combo_box_set_model (combo_box, g_value_get_object (value));
1142       break;
1143
1144     case PROP_WRAP_WIDTH:
1145       gtk_combo_box_set_wrap_width (combo_box, g_value_get_int (value));
1146       break;
1147
1148     case PROP_ROW_SPAN_COLUMN:
1149       gtk_combo_box_set_row_span_column (combo_box, g_value_get_int (value));
1150       break;
1151
1152     case PROP_COLUMN_SPAN_COLUMN:
1153       gtk_combo_box_set_column_span_column (combo_box, g_value_get_int (value));
1154       break;
1155
1156     case PROP_ACTIVE:
1157       gtk_combo_box_set_active (combo_box, g_value_get_int (value));
1158       break;
1159
1160     case PROP_ADD_TEAROFFS:
1161       gtk_combo_box_set_add_tearoffs (combo_box, g_value_get_boolean (value));
1162       break;
1163
1164     case PROP_HAS_FRAME:
1165       priv->has_frame = g_value_get_boolean (value);
1166
1167       if (priv->has_entry)
1168         {
1169           GtkWidget *child;
1170
1171           child = gtk_bin_get_child (GTK_BIN (combo_box));
1172
1173           gtk_entry_set_has_frame (GTK_ENTRY (child), priv->has_frame);
1174         }
1175
1176       break;
1177
1178     case PROP_FOCUS_ON_CLICK:
1179       gtk_combo_box_set_focus_on_click (combo_box,
1180                                         g_value_get_boolean (value));
1181       break;
1182
1183     case PROP_TEAROFF_TITLE:
1184       gtk_combo_box_set_title (combo_box, g_value_get_string (value));
1185       break;
1186
1187     case PROP_POPUP_SHOWN:
1188       if (g_value_get_boolean (value))
1189         gtk_combo_box_popup (combo_box);
1190       else
1191         gtk_combo_box_popdown (combo_box);
1192       break;
1193
1194     case PROP_BUTTON_SENSITIVITY:
1195       gtk_combo_box_set_button_sensitivity (combo_box,
1196                                             g_value_get_enum (value));
1197       break;
1198
1199     case PROP_POPUP_FIXED_WIDTH:
1200       gtk_combo_box_set_popup_fixed_width (combo_box,
1201                                            g_value_get_boolean (value));
1202       break;
1203
1204     case PROP_EDITING_CANCELED:
1205       priv->editing_canceled = g_value_get_boolean (value);
1206       break;
1207
1208     case PROP_HAS_ENTRY:
1209       priv->has_entry = g_value_get_boolean (value);
1210       break;
1211
1212     case PROP_ENTRY_TEXT_COLUMN:
1213       gtk_combo_box_set_entry_text_column (combo_box, g_value_get_int (value));
1214       break;
1215
1216     case PROP_ID_COLUMN:
1217       gtk_combo_box_set_id_column (combo_box, g_value_get_int (value));
1218       break;
1219
1220     case PROP_ACTIVE_ID:
1221       gtk_combo_box_set_active_id (combo_box, g_value_get_string (value));
1222       break;
1223
1224     case PROP_CELL_AREA:
1225       /* Construct-only, can only be assigned once */
1226       area = g_value_get_object (value);
1227       if (area)
1228         {
1229           if (priv->area != NULL)
1230             {
1231               g_warning ("cell-area has already been set, ignoring construct property");
1232               g_object_ref_sink (area);
1233               g_object_unref (area);
1234             }
1235           else
1236             priv->area = g_object_ref_sink (area);
1237         }
1238       break;
1239
1240     default:
1241       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1242       break;
1243     }
1244 }
1245
1246 static void
1247 gtk_combo_box_get_property (GObject    *object,
1248                             guint       prop_id,
1249                             GValue     *value,
1250                             GParamSpec *pspec)
1251 {
1252   GtkComboBox *combo_box = GTK_COMBO_BOX (object);
1253   GtkComboBoxPrivate *priv = combo_box->priv;
1254
1255   switch (prop_id)
1256     {
1257       case PROP_MODEL:
1258         g_value_set_object (value, combo_box->priv->model);
1259         break;
1260
1261       case PROP_WRAP_WIDTH:
1262         g_value_set_int (value, combo_box->priv->wrap_width);
1263         break;
1264
1265       case PROP_ROW_SPAN_COLUMN:
1266         g_value_set_int (value, combo_box->priv->row_column);
1267         break;
1268
1269       case PROP_COLUMN_SPAN_COLUMN:
1270         g_value_set_int (value, combo_box->priv->col_column);
1271         break;
1272
1273       case PROP_ACTIVE:
1274         g_value_set_int (value, gtk_combo_box_get_active (combo_box));
1275         break;
1276
1277       case PROP_ADD_TEAROFFS:
1278         g_value_set_boolean (value, gtk_combo_box_get_add_tearoffs (combo_box));
1279         break;
1280
1281       case PROP_HAS_FRAME:
1282         g_value_set_boolean (value, combo_box->priv->has_frame);
1283         break;
1284
1285       case PROP_FOCUS_ON_CLICK:
1286         g_value_set_boolean (value, combo_box->priv->focus_on_click);
1287         break;
1288
1289       case PROP_TEAROFF_TITLE:
1290         g_value_set_string (value, gtk_combo_box_get_title (combo_box));
1291         break;
1292
1293       case PROP_POPUP_SHOWN:
1294         g_value_set_boolean (value, combo_box->priv->popup_shown);
1295         break;
1296
1297       case PROP_BUTTON_SENSITIVITY:
1298         g_value_set_enum (value, combo_box->priv->button_sensitivity);
1299         break;
1300
1301       case PROP_POPUP_FIXED_WIDTH:
1302         g_value_set_boolean (value, combo_box->priv->popup_fixed_width);
1303         break;
1304
1305       case PROP_EDITING_CANCELED:
1306         g_value_set_boolean (value, priv->editing_canceled);
1307         break;
1308
1309       case PROP_HAS_ENTRY:
1310         g_value_set_boolean (value, priv->has_entry);
1311         break;
1312
1313       case PROP_ENTRY_TEXT_COLUMN:
1314         g_value_set_int (value, priv->text_column);
1315         break;
1316
1317       case PROP_ID_COLUMN:
1318         g_value_set_int (value, priv->id_column);
1319         break;
1320
1321       case PROP_ACTIVE_ID:
1322         g_value_set_string (value, gtk_combo_box_get_active_id (combo_box));
1323         break;
1324
1325       case PROP_CELL_AREA:
1326         g_value_set_object (value, priv->area);
1327         break;
1328
1329       default:
1330         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1331         break;
1332     }
1333 }
1334
1335 static void
1336 gtk_combo_box_state_flags_changed (GtkWidget     *widget,
1337                                    GtkStateFlags  previous)
1338 {
1339   GtkComboBox *combo_box = GTK_COMBO_BOX (widget);
1340   GtkComboBoxPrivate *priv = combo_box->priv;
1341
1342   if (gtk_widget_get_realized (widget))
1343     {
1344       if (priv->tree_view && priv->cell_view)
1345         {
1346           GtkStyleContext *context;
1347           GtkStateFlags state;
1348           GdkRGBA color;
1349
1350           context  = gtk_widget_get_style_context (widget);
1351           state = gtk_widget_get_state_flags (widget);
1352           gtk_style_context_get_background_color (context, state, &color);
1353
1354           gtk_cell_view_set_background_rgba (GTK_CELL_VIEW (priv->cell_view), &color);
1355         }
1356     }
1357
1358   gtk_widget_queue_draw (widget);
1359 }
1360
1361 static void
1362 gtk_combo_box_button_state_flags_changed (GtkWidget     *widget,
1363                                           GtkStateFlags  previous,
1364                                           gpointer       data)
1365 {
1366   GtkComboBox *combo_box = GTK_COMBO_BOX (data);
1367   GtkComboBoxPrivate *priv = combo_box->priv;
1368
1369   if (gtk_widget_get_realized (widget))
1370     {
1371       if (!priv->tree_view && priv->cell_view)
1372         gtk_widget_set_state_flags (priv->cell_view,
1373                                     gtk_widget_get_state_flags (widget),
1374                                     TRUE);
1375     }
1376
1377   gtk_widget_queue_draw (widget);
1378 }
1379
1380 static void
1381 gtk_combo_box_invalidate_order (GtkComboBox *combo_box)
1382 {
1383   gtk_container_forall (GTK_CONTAINER (combo_box),
1384                         (GtkCallback) gtk_widget_reset_style,
1385                         NULL);
1386 }
1387
1388 static void
1389 gtk_combo_box_direction_changed (GtkWidget        *widget,
1390                                  GtkTextDirection  previous_direction)
1391 {
1392   gtk_combo_box_invalidate_order (GTK_COMBO_BOX (widget));
1393 }
1394
1395 static GtkWidgetPath *
1396 gtk_combo_box_get_path_for_child (GtkContainer *container,
1397                                   GtkWidget    *child)
1398 {
1399   GtkComboBoxPrivate *priv = GTK_COMBO_BOX (container)->priv;
1400   GtkWidgetPath *path;
1401   GtkWidget *widget;
1402   gboolean found = FALSE;
1403   GList *visible_children, *l;
1404   GtkWidgetPath *sibling_path;
1405   int pos;
1406
1407   path = gtk_widget_path_copy (gtk_widget_get_path (GTK_WIDGET (container)));
1408
1409   if (gtk_widget_get_visible (child))
1410     {
1411       visible_children = NULL;
1412
1413       if (priv->button && gtk_widget_get_visible (priv->button))
1414         visible_children = g_list_prepend (visible_children, priv->button);
1415
1416       if (priv->cell_view_frame && gtk_widget_get_visible (priv->cell_view_frame))
1417         visible_children = g_list_prepend (visible_children, priv->cell_view_frame);
1418
1419       widget = gtk_bin_get_child (GTK_BIN (container));
1420       if (widget && gtk_widget_get_visible (widget))
1421         visible_children = g_list_prepend (visible_children, widget);
1422
1423       if (gtk_widget_get_direction (GTK_WIDGET (container)) == GTK_TEXT_DIR_RTL)
1424         visible_children = g_list_reverse (visible_children);
1425
1426       pos = 0;
1427
1428       for (l = visible_children; l; l = l->next)
1429         {
1430           widget = l->data;
1431
1432           if (widget == child)
1433             {
1434               found = TRUE;
1435               break;
1436             }
1437
1438           pos++;
1439         }
1440     }
1441
1442   if (found)
1443     {
1444       sibling_path = gtk_widget_path_new ();
1445
1446       for (l = visible_children; l; l = l->next)
1447         gtk_widget_path_append_for_widget (sibling_path, l->data);
1448
1449       gtk_widget_path_append_with_siblings (path, sibling_path, pos);
1450
1451       g_list_free (visible_children);
1452       gtk_widget_path_unref (sibling_path);
1453     }
1454   else
1455     {
1456       gtk_widget_path_append_for_widget (path, child);
1457     }
1458
1459   return path;
1460 }
1461
1462 static void
1463 gtk_combo_box_check_appearance (GtkComboBox *combo_box)
1464 {
1465   GtkComboBoxPrivate *priv = combo_box->priv;
1466   gboolean appears_as_list;
1467
1468   /* if wrap_width > 0, then we are in grid-mode and forced to use
1469    * unix style
1470    */
1471   if (priv->wrap_width)
1472     appears_as_list = FALSE;
1473   else
1474     gtk_widget_style_get (GTK_WIDGET (combo_box),
1475                           "appears-as-list", &appears_as_list,
1476                           NULL);
1477
1478   if (appears_as_list)
1479     {
1480       /* Destroy all the menu mode widgets, if they exist. */
1481       if (GTK_IS_MENU (priv->popup_widget))
1482         gtk_combo_box_menu_destroy (combo_box);
1483
1484       /* Create the list mode widgets, if they don't already exist. */
1485       if (!GTK_IS_TREE_VIEW (priv->tree_view))
1486         gtk_combo_box_list_setup (combo_box);
1487     }
1488   else
1489     {
1490       /* Destroy all the list mode widgets, if they exist. */
1491       if (GTK_IS_TREE_VIEW (priv->tree_view))
1492         gtk_combo_box_list_destroy (combo_box);
1493
1494       /* Create the menu mode widgets, if they don't already exist. */
1495       if (!GTK_IS_MENU (priv->popup_widget))
1496         gtk_combo_box_menu_setup (combo_box, TRUE);
1497     }
1498
1499   gtk_widget_style_get (GTK_WIDGET (combo_box),
1500                         "shadow-type", &priv->shadow_type,
1501                         NULL);
1502 }
1503
1504 static void
1505 gtk_combo_box_style_updated (GtkWidget *widget)
1506 {
1507   GtkComboBox *combo_box = GTK_COMBO_BOX (widget);
1508   GtkComboBoxPrivate *priv = combo_box->priv;
1509   GtkWidget *child;
1510
1511   GTK_WIDGET_CLASS (gtk_combo_box_parent_class)->style_updated (widget);
1512
1513   gtk_combo_box_check_appearance (combo_box);
1514
1515   if (priv->tree_view && priv->cell_view)
1516     {
1517       GtkStyleContext *context;
1518       GtkStateFlags state;
1519       GdkRGBA color;
1520
1521       context  = gtk_widget_get_style_context (widget);
1522       state = gtk_widget_get_state_flags (widget);
1523       gtk_style_context_get_background_color (context, state, &color);
1524
1525       gtk_cell_view_set_background_rgba (GTK_CELL_VIEW (priv->cell_view), &color);
1526     }
1527
1528   child = gtk_bin_get_child (GTK_BIN (combo_box));
1529   if (GTK_IS_ENTRY (child))
1530     g_object_set (child, "shadow-type",
1531                   GTK_SHADOW_NONE == priv->shadow_type ?
1532                   GTK_SHADOW_IN : GTK_SHADOW_NONE, NULL);
1533 }
1534
1535 static void
1536 gtk_combo_box_button_toggled (GtkWidget *widget,
1537                               gpointer   data)
1538 {
1539   GtkComboBox *combo_box = GTK_COMBO_BOX (data);
1540
1541   if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget)))
1542     {
1543       if (!combo_box->priv->popup_in_progress)
1544         gtk_combo_box_popup (combo_box);
1545     }
1546   else
1547     gtk_combo_box_popdown (combo_box);
1548 }
1549
1550 static void
1551 gtk_combo_box_add (GtkContainer *container,
1552                    GtkWidget    *widget)
1553 {
1554   GtkComboBox *combo_box = GTK_COMBO_BOX (container);
1555   GtkComboBoxPrivate *priv = combo_box->priv;
1556
1557   if (priv->has_entry && !GTK_IS_ENTRY (widget))
1558     {
1559       g_warning ("Attempting to add a widget with type %s to a GtkComboBox that needs an entry "
1560                  "(need an instance of GtkEntry or of a subclass)",
1561                  G_OBJECT_TYPE_NAME (widget));
1562       return;
1563     }
1564
1565   if (priv->cell_view &&
1566       gtk_widget_get_parent (priv->cell_view))
1567     {
1568       gtk_widget_unparent (priv->cell_view);
1569       _gtk_bin_set_child (GTK_BIN (container), NULL);
1570       gtk_widget_queue_resize (GTK_WIDGET (container));
1571     }
1572
1573   gtk_widget_set_parent (widget, GTK_WIDGET (container));
1574   _gtk_bin_set_child (GTK_BIN (container), widget);
1575
1576   if (priv->cell_view &&
1577       widget != priv->cell_view)
1578     {
1579       /* since the cell_view was unparented, it's gone now */
1580       priv->cell_view = NULL;
1581
1582       if (!priv->tree_view && priv->separator)
1583         {
1584           gtk_container_remove (GTK_CONTAINER (gtk_widget_get_parent (priv->separator)),
1585                                 priv->separator);
1586           priv->separator = NULL;
1587
1588           gtk_widget_queue_resize (GTK_WIDGET (container));
1589         }
1590       else if (priv->cell_view_frame)
1591         {
1592           gtk_widget_unparent (priv->cell_view_frame);
1593           priv->cell_view_frame = NULL;
1594           priv->box = NULL;
1595         }
1596     }
1597
1598   if (priv->has_entry)
1599     {
1600       /* this flag is a hack to tell the entry to fill its allocation.
1601        */
1602       _gtk_entry_set_is_cell_renderer (GTK_ENTRY (widget), TRUE);
1603
1604       g_signal_connect (widget, "changed",
1605                         G_CALLBACK (gtk_combo_box_entry_contents_changed),
1606                         combo_box);
1607
1608       gtk_entry_set_has_frame (GTK_ENTRY (widget), priv->has_frame);
1609     }
1610 }
1611
1612 static void
1613 gtk_combo_box_remove (GtkContainer *container,
1614                       GtkWidget    *widget)
1615 {
1616   GtkComboBox *combo_box = GTK_COMBO_BOX (container);
1617   GtkComboBoxPrivate *priv = combo_box->priv;
1618   GtkTreePath *path;
1619   gboolean appears_as_list;
1620
1621   if (priv->has_entry)
1622     {
1623       GtkWidget *child_widget;
1624
1625       child_widget = gtk_bin_get_child (GTK_BIN (container));
1626       if (widget && widget == child_widget)
1627         {
1628           g_signal_handlers_disconnect_by_func (widget,
1629                                                 gtk_combo_box_entry_contents_changed,
1630                                                 container);
1631           _gtk_entry_set_is_cell_renderer (GTK_ENTRY (widget), FALSE);
1632         }
1633     }
1634
1635   if (widget == priv->cell_view)
1636     priv->cell_view = NULL;
1637
1638   gtk_widget_unparent (widget);
1639   _gtk_bin_set_child (GTK_BIN (container), NULL);
1640
1641   if (gtk_widget_in_destruction (GTK_WIDGET (combo_box)))
1642     return;
1643
1644   gtk_widget_queue_resize (GTK_WIDGET (container));
1645
1646   if (!priv->tree_view)
1647     appears_as_list = FALSE;
1648   else
1649     appears_as_list = TRUE;
1650
1651   if (appears_as_list)
1652     gtk_combo_box_list_destroy (combo_box);
1653   else if (GTK_IS_MENU (priv->popup_widget))
1654     {
1655       gtk_combo_box_menu_destroy (combo_box);
1656       gtk_menu_detach (GTK_MENU (priv->popup_widget));
1657       priv->popup_widget = NULL;
1658     }
1659
1660   if (!priv->cell_view)
1661     {
1662       priv->cell_view = gtk_cell_view_new ();
1663       gtk_widget_set_parent (priv->cell_view, GTK_WIDGET (container));
1664       _gtk_bin_set_child (GTK_BIN (container), priv->cell_view);
1665
1666       gtk_widget_show (priv->cell_view);
1667       gtk_cell_view_set_model (GTK_CELL_VIEW (priv->cell_view),
1668                                priv->model);
1669     }
1670
1671
1672   if (appears_as_list)
1673     gtk_combo_box_list_setup (combo_box);
1674   else
1675     gtk_combo_box_menu_setup (combo_box, TRUE);
1676
1677   if (gtk_tree_row_reference_valid (priv->active_row))
1678     {
1679       path = gtk_tree_row_reference_get_path (priv->active_row);
1680       gtk_combo_box_set_active_internal (combo_box, path);
1681       gtk_tree_path_free (path);
1682     }
1683   else
1684     gtk_combo_box_set_active_internal (combo_box, NULL);
1685 }
1686
1687 static void
1688 gtk_combo_box_menu_show (GtkWidget *menu,
1689                          gpointer   user_data)
1690 {
1691   GtkComboBox *combo_box = GTK_COMBO_BOX (user_data);
1692   GtkComboBoxPrivate *priv = combo_box->priv;
1693
1694   gtk_combo_box_child_show (menu, user_data);
1695
1696   priv->popup_in_progress = TRUE;
1697   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (priv->button),
1698                                 TRUE);
1699   priv->popup_in_progress = FALSE;
1700 }
1701
1702 static void
1703 gtk_combo_box_menu_hide (GtkWidget *menu,
1704                          gpointer   user_data)
1705 {
1706   GtkComboBox *combo_box = GTK_COMBO_BOX (user_data);
1707
1708   gtk_combo_box_child_hide (menu,user_data);
1709
1710   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (combo_box->priv->button),
1711                                 FALSE);
1712 }
1713
1714 static void
1715 gtk_combo_box_detacher (GtkWidget *widget,
1716                         GtkMenu          *menu)
1717 {
1718   GtkComboBox *combo_box = GTK_COMBO_BOX (widget);
1719   GtkComboBoxPrivate *priv = combo_box->priv;
1720
1721   g_return_if_fail (priv->popup_widget == (GtkWidget *) menu);
1722
1723   g_signal_handlers_disconnect_by_func (menu->priv->toplevel,
1724                                         gtk_combo_box_menu_show,
1725                                         combo_box);
1726   g_signal_handlers_disconnect_by_func (menu->priv->toplevel,
1727                                         gtk_combo_box_menu_hide,
1728                                         combo_box);
1729
1730   priv->popup_widget = NULL;
1731 }
1732
1733 static void
1734 gtk_combo_box_set_popup_widget (GtkComboBox *combo_box,
1735                                 GtkWidget   *popup)
1736 {
1737   GtkComboBoxPrivate *priv = combo_box->priv;
1738
1739   if (GTK_IS_MENU (priv->popup_widget))
1740     {
1741       gtk_menu_detach (GTK_MENU (priv->popup_widget));
1742       priv->popup_widget = NULL;
1743     }
1744   else if (priv->popup_widget)
1745     {
1746       gtk_container_remove (GTK_CONTAINER (priv->scrolled_window),
1747                             priv->popup_widget);
1748       g_object_unref (priv->popup_widget);
1749       priv->popup_widget = NULL;
1750     }
1751
1752   if (GTK_IS_MENU (popup))
1753     {
1754       if (priv->popup_window)
1755         {
1756           gtk_widget_destroy (priv->popup_window);
1757           priv->popup_window = NULL;
1758         }
1759
1760       priv->popup_widget = popup;
1761
1762       /*
1763        * Note that we connect to show/hide on the toplevel, not the
1764        * menu itself, since the menu is not shown/hidden when it is
1765        * popped up while torn-off.
1766        */
1767       g_signal_connect (GTK_MENU (popup)->priv->toplevel, "show",
1768                         G_CALLBACK (gtk_combo_box_menu_show), combo_box);
1769       g_signal_connect (GTK_MENU (popup)->priv->toplevel, "hide",
1770                         G_CALLBACK (gtk_combo_box_menu_hide), combo_box);
1771
1772       gtk_menu_attach_to_widget (GTK_MENU (popup),
1773                                  GTK_WIDGET (combo_box),
1774                                  gtk_combo_box_detacher);
1775     }
1776   else
1777     {
1778       if (!priv->popup_window)
1779         {
1780           GtkWidget *toplevel;
1781
1782           priv->popup_window = gtk_window_new (GTK_WINDOW_POPUP);
1783           gtk_widget_set_name (priv->popup_window, "gtk-combobox-popup-window");
1784
1785           gtk_window_set_type_hint (GTK_WINDOW (priv->popup_window),
1786                                     GDK_WINDOW_TYPE_HINT_COMBO);
1787
1788           g_signal_connect (GTK_WINDOW (priv->popup_window),"show",
1789                             G_CALLBACK (gtk_combo_box_child_show),
1790                             combo_box);
1791           g_signal_connect (GTK_WINDOW (priv->popup_window),"hide",
1792                             G_CALLBACK (gtk_combo_box_child_hide),
1793                             combo_box);
1794
1795           toplevel = gtk_widget_get_toplevel (GTK_WIDGET (combo_box));
1796           if (GTK_IS_WINDOW (toplevel))
1797             {
1798               gtk_window_group_add_window (gtk_window_get_group (GTK_WINDOW (toplevel)),
1799                                            GTK_WINDOW (priv->popup_window));
1800               gtk_window_set_transient_for (GTK_WINDOW (priv->popup_window),
1801                                             GTK_WINDOW (toplevel));
1802             }
1803
1804           gtk_window_set_resizable (GTK_WINDOW (priv->popup_window), FALSE);
1805           gtk_window_set_screen (GTK_WINDOW (priv->popup_window),
1806                                  gtk_widget_get_screen (GTK_WIDGET (combo_box)));
1807
1808           priv->scrolled_window = gtk_scrolled_window_new (NULL, NULL);
1809
1810           gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->scrolled_window),
1811                                           GTK_POLICY_NEVER,
1812                                           GTK_POLICY_NEVER);
1813           gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (priv->scrolled_window),
1814                                                GTK_SHADOW_IN);
1815
1816           gtk_widget_show (priv->scrolled_window);
1817
1818           gtk_container_add (GTK_CONTAINER (priv->popup_window),
1819                              priv->scrolled_window);
1820         }
1821
1822       gtk_container_add (GTK_CONTAINER (priv->scrolled_window),
1823                          popup);
1824
1825       gtk_widget_show (popup);
1826       g_object_ref (popup);
1827       priv->popup_widget = popup;
1828     }
1829 }
1830
1831 static void
1832 get_widget_padding_and_border (GtkWidget *widget,
1833                                GtkBorder *padding)
1834 {
1835   GtkStyleContext *context;
1836   GtkStateFlags state;
1837   GtkBorder tmp;
1838
1839   context = gtk_widget_get_style_context (widget);
1840   state = gtk_style_context_get_state (context);
1841
1842   gtk_style_context_get_padding (context, state, padding);
1843   gtk_style_context_get_border (context, state, &tmp);
1844
1845   padding->top += tmp.top;
1846   padding->right += tmp.right;
1847   padding->bottom += tmp.bottom;
1848   padding->left += tmp.left;
1849 }
1850
1851 static void
1852 gtk_combo_box_menu_position_below (GtkMenu  *menu,
1853                                    gint     *x,
1854                                    gint     *y,
1855                                    gint     *push_in,
1856                                    gpointer  user_data)
1857 {
1858   GtkComboBox *combo_box = GTK_COMBO_BOX (user_data);
1859   GtkAllocation child_allocation;
1860   gint sx, sy;
1861   GtkWidget *child;
1862   GtkRequisition req;
1863   GdkScreen *screen;
1864   gint monitor_num;
1865   GdkRectangle monitor;
1866   GtkBorder padding;
1867
1868   /* FIXME: is using the size request here broken? */
1869   child = gtk_bin_get_child (GTK_BIN (combo_box));
1870
1871   sx = sy = 0;
1872
1873   gtk_widget_get_allocation (child, &child_allocation);
1874
1875   if (!gtk_widget_get_has_window (child))
1876     {
1877       sx += child_allocation.x;
1878       sy += child_allocation.y;
1879     }
1880
1881   gdk_window_get_root_coords (gtk_widget_get_window (child),
1882                               sx, sy, &sx, &sy);
1883   get_widget_padding_and_border (GTK_WIDGET (combo_box), &padding);
1884   sx -= padding.left;
1885
1886   if (combo_box->priv->popup_fixed_width)
1887     gtk_widget_get_preferred_size (GTK_WIDGET (menu), &req, NULL);
1888   else
1889     gtk_widget_get_preferred_size (GTK_WIDGET (menu), NULL, &req);
1890
1891   if (gtk_widget_get_direction (GTK_WIDGET (combo_box)) == GTK_TEXT_DIR_LTR)
1892     *x = sx;
1893   else
1894     *x = sx + child_allocation.width - req.width;
1895   *y = sy;
1896
1897   screen = gtk_widget_get_screen (GTK_WIDGET (combo_box));
1898   monitor_num = gdk_screen_get_monitor_at_window (screen,
1899                                                   gtk_widget_get_window (GTK_WIDGET (combo_box)));
1900   gdk_screen_get_monitor_workarea (screen, monitor_num, &monitor);
1901
1902   if (*x < monitor.x)
1903     *x = monitor.x;
1904   else if (*x + req.width > monitor.x + monitor.width)
1905     *x = monitor.x + monitor.width - req.width;
1906
1907   if (monitor.y + monitor.height - *y - child_allocation.height >= req.height)
1908     *y += child_allocation.height;
1909   else if (*y - monitor.y >= req.height)
1910     *y -= req.height;
1911   else if (monitor.y + monitor.height - *y - child_allocation.height > *y - monitor.y)
1912     *y += child_allocation.height;
1913   else
1914     *y -= req.height;
1915
1916    *push_in = FALSE;
1917 }
1918
1919 static void
1920 gtk_combo_box_menu_position_over (GtkMenu  *menu,
1921                                   gint     *x,
1922                                   gint     *y,
1923                                   gboolean *push_in,
1924                                   gpointer  user_data)
1925 {
1926   GtkComboBox    *combo_box;
1927   GtkWidget      *active;
1928   GtkWidget      *child;
1929   GtkWidget      *widget;
1930   GtkAllocation   allocation;
1931   GtkAllocation   child_allocation;
1932   GList          *children;
1933   gint            screen_width;
1934   gint            menu_xpos;
1935   gint            menu_ypos;
1936   gint            menu_width;
1937
1938   combo_box = GTK_COMBO_BOX (user_data);
1939   widget = GTK_WIDGET (combo_box);
1940
1941   active = gtk_menu_get_active (GTK_MENU (combo_box->priv->popup_widget));
1942
1943   gtk_widget_get_allocation (widget, &allocation);
1944
1945   menu_xpos = allocation.x;
1946   menu_ypos = allocation.y + allocation.height / 2 - 2;
1947
1948   if (combo_box->priv->popup_fixed_width)
1949     gtk_widget_get_preferred_width (GTK_WIDGET (menu), &menu_width, NULL);
1950   else
1951     gtk_widget_get_preferred_width (GTK_WIDGET (menu), NULL, &menu_width);
1952
1953   if (active != NULL)
1954     {
1955       gtk_widget_get_allocation (active, &child_allocation);
1956       menu_ypos -= child_allocation.height / 2;
1957     }
1958
1959   children = GTK_MENU_SHELL (combo_box->priv->popup_widget)->priv->children;
1960   while (children)
1961     {
1962       child = children->data;
1963
1964       if (active == child)
1965         break;
1966
1967       if (gtk_widget_get_visible (child))
1968         {
1969           gtk_widget_get_allocation (child, &child_allocation);
1970
1971           menu_ypos -= child_allocation.height;
1972         }
1973
1974       children = children->next;
1975     }
1976
1977   if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
1978     menu_xpos = menu_xpos + allocation.width - menu_width;
1979
1980   gdk_window_get_root_coords (gtk_widget_get_window (widget),
1981                               menu_xpos, menu_ypos,
1982                               &menu_xpos, &menu_ypos);
1983
1984   /* Clamp the position on screen */
1985   screen_width = gdk_screen_get_width (gtk_widget_get_screen (widget));
1986
1987   if (menu_xpos < 0)
1988     menu_xpos = 0;
1989   else if ((menu_xpos + menu_width) > screen_width)
1990     menu_xpos -= ((menu_xpos + menu_width) - screen_width);
1991
1992   *x = menu_xpos;
1993   *y = menu_ypos;
1994
1995   *push_in = TRUE;
1996 }
1997
1998 static void
1999 gtk_combo_box_menu_position (GtkMenu  *menu,
2000                              gint     *x,
2001                              gint     *y,
2002                              gint     *push_in,
2003                              gpointer  user_data)
2004 {
2005   GtkComboBox *combo_box = GTK_COMBO_BOX (user_data);
2006   GtkComboBoxPrivate *priv = combo_box->priv;
2007   GtkWidget *menu_item;
2008
2009   if (priv->wrap_width > 0 || priv->cell_view == NULL)
2010     gtk_combo_box_menu_position_below (menu, x, y, push_in, user_data);
2011   else
2012     {
2013       /* FIXME handle nested menus better */
2014       menu_item = gtk_menu_get_active (GTK_MENU (priv->popup_widget));
2015       if (menu_item)
2016         gtk_menu_shell_select_item (GTK_MENU_SHELL (priv->popup_widget),
2017                                     menu_item);
2018
2019       gtk_combo_box_menu_position_over (menu, x, y, push_in, user_data);
2020     }
2021
2022   if (!gtk_widget_get_visible (GTK_MENU (priv->popup_widget)->priv->toplevel))
2023     gtk_window_set_type_hint (GTK_WINDOW (GTK_MENU (priv->popup_widget)->priv->toplevel),
2024                               GDK_WINDOW_TYPE_HINT_COMBO);
2025 }
2026
2027 static void
2028 gtk_combo_box_list_position (GtkComboBox *combo_box,
2029                              gint        *x,
2030                              gint        *y,
2031                              gint        *width,
2032                              gint        *height)
2033 {
2034   GtkComboBoxPrivate *priv = combo_box->priv;
2035   GtkAllocation allocation;
2036   GdkScreen *screen;
2037   gint monitor_num;
2038   GdkRectangle monitor;
2039   GtkRequisition popup_req;
2040   GtkPolicyType hpolicy, vpolicy;
2041   GdkWindow *window;
2042
2043   /* under windows, the drop down list is as wide as the combo box itself.
2044      see bug #340204 */
2045   GtkWidget *widget = GTK_WIDGET (combo_box);
2046
2047   *x = *y = 0;
2048
2049   gtk_widget_get_allocation (widget, &allocation);
2050
2051   if (!gtk_widget_get_has_window (widget))
2052     {
2053       *x += allocation.x;
2054       *y += allocation.y;
2055     }
2056
2057   window = gtk_widget_get_window (widget);
2058
2059   gdk_window_get_root_coords (gtk_widget_get_window (widget),
2060                               *x, *y, x, y);
2061
2062   *width = allocation.width;
2063
2064   hpolicy = vpolicy = GTK_POLICY_NEVER;
2065   gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->scrolled_window),
2066                                   hpolicy, vpolicy);
2067
2068   if (combo_box->priv->popup_fixed_width)
2069     {
2070       gtk_widget_get_preferred_size (priv->scrolled_window, &popup_req, NULL);
2071
2072       if (popup_req.width > *width)
2073         {
2074           hpolicy = GTK_POLICY_ALWAYS;
2075           gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->scrolled_window),
2076                                           hpolicy, vpolicy);
2077         }
2078     }
2079   else
2080     {
2081       /* XXX This code depends on treeviews properly reporting their natural width
2082        * list-mode menus won't fill up to their natural width until then */
2083       gtk_widget_get_preferred_size (priv->scrolled_window, NULL, &popup_req);
2084
2085       if (popup_req.width > *width)
2086         {
2087           hpolicy = GTK_POLICY_NEVER;
2088           gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->scrolled_window),
2089                                           hpolicy, vpolicy);
2090
2091           *width = popup_req.width;
2092         }
2093     }
2094
2095   *height = popup_req.height;
2096
2097   screen = gtk_widget_get_screen (GTK_WIDGET (combo_box));
2098   monitor_num = gdk_screen_get_monitor_at_window (screen, window);
2099   gdk_screen_get_monitor_workarea (screen, monitor_num, &monitor);
2100
2101   if (gtk_widget_get_direction (GTK_WIDGET (combo_box)) == GTK_TEXT_DIR_RTL)
2102     *x = *x + allocation.width - *width;
2103
2104   if (*x < monitor.x)
2105     *x = monitor.x;
2106   else if (*x + *width > monitor.x + monitor.width)
2107     *x = monitor.x + monitor.width - *width;
2108
2109   if (*y + allocation.height + *height <= monitor.y + monitor.height)
2110     *y += allocation.height;
2111   else if (*y - *height >= monitor.y)
2112     *y -= *height;
2113   else if (monitor.y + monitor.height - (*y + allocation.height) > *y - monitor.y)
2114     {
2115       *y += allocation.height;
2116       *height = monitor.y + monitor.height - *y;
2117     }
2118   else
2119     {
2120       *height = *y - monitor.y;
2121       *y = monitor.y;
2122     }
2123
2124   if (popup_req.height > *height)
2125     {
2126       vpolicy = GTK_POLICY_ALWAYS;
2127
2128       gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->scrolled_window),
2129                                       hpolicy, vpolicy);
2130     }
2131 }
2132
2133 static gboolean
2134 cell_layout_is_sensitive (GtkCellLayout *layout)
2135 {
2136   GList *cells, *list;
2137   gboolean sensitive;
2138
2139   cells = gtk_cell_layout_get_cells (layout);
2140
2141   sensitive = FALSE;
2142   for (list = cells; list; list = list->next)
2143     {
2144       g_object_get (list->data, "sensitive", &sensitive, NULL);
2145
2146       if (sensitive)
2147         break;
2148     }
2149   g_list_free (cells);
2150
2151   return sensitive;
2152 }
2153
2154 static gboolean
2155 cell_is_sensitive (GtkCellRenderer *cell,
2156                    gpointer         data)
2157 {
2158   gboolean *sensitive = data;
2159
2160   g_object_get (cell, "sensitive", sensitive, NULL);
2161
2162   return *sensitive;
2163 }
2164
2165 static gboolean
2166 tree_column_row_is_sensitive (GtkComboBox *combo_box,
2167                               GtkTreeIter *iter)
2168 {
2169   GtkComboBoxPrivate *priv = combo_box->priv;
2170
2171   if (priv->row_separator_func)
2172     {
2173       if (priv->row_separator_func (priv->model, iter,
2174                                     priv->row_separator_data))
2175         return FALSE;
2176     }
2177
2178   if (priv->area)
2179     {
2180       gboolean sensitive;
2181
2182       gtk_cell_area_apply_attributes (priv->area, priv->model, iter, FALSE, FALSE);
2183
2184       sensitive = FALSE;
2185
2186       gtk_cell_area_foreach (priv->area, cell_is_sensitive, &sensitive);
2187
2188       return sensitive;
2189     }
2190
2191   return TRUE;
2192 }
2193
2194 static void
2195 update_menu_sensitivity (GtkComboBox *combo_box,
2196                          GtkWidget   *menu)
2197 {
2198   GtkComboBoxPrivate *priv = combo_box->priv;
2199   GList *children, *child;
2200   GtkWidget *item, *submenu, *separator;
2201   GtkWidget *cell_view;
2202   gboolean sensitive;
2203
2204   if (!priv->model)
2205     return;
2206
2207   children = gtk_container_get_children (GTK_CONTAINER (menu));
2208
2209   for (child = children; child; child = child->next)
2210     {
2211       item = GTK_WIDGET (child->data);
2212       cell_view = gtk_bin_get_child (GTK_BIN (item));
2213
2214       if (!GTK_IS_CELL_VIEW (cell_view))
2215         continue;
2216
2217       submenu = gtk_menu_item_get_submenu (GTK_MENU_ITEM (item));
2218       if (submenu != NULL)
2219         {
2220           gtk_widget_set_sensitive (item, TRUE);
2221           update_menu_sensitivity (combo_box, submenu);
2222         }
2223       else
2224         {
2225           sensitive = cell_layout_is_sensitive (GTK_CELL_LAYOUT (cell_view));
2226
2227           if (menu != priv->popup_widget && child == children)
2228             {
2229               separator = GTK_WIDGET (child->next->data);
2230               g_object_set (item, "visible", sensitive, NULL);
2231               g_object_set (separator, "visible", sensitive, NULL);
2232             }
2233           else
2234             gtk_widget_set_sensitive (item, sensitive);
2235         }
2236     }
2237
2238   g_list_free (children);
2239 }
2240
2241 static void
2242 gtk_combo_box_menu_popup (GtkComboBox *combo_box,
2243                           guint        button,
2244                           guint32      activate_time)
2245 {
2246   GtkComboBoxPrivate *priv = combo_box->priv;
2247   GtkTreePath *path;
2248   gint active_item;
2249   gint width, min_width, nat_width;
2250
2251   update_menu_sensitivity (combo_box, priv->popup_widget);
2252
2253   active_item = -1;
2254   if (gtk_tree_row_reference_valid (priv->active_row))
2255     {
2256       path = gtk_tree_row_reference_get_path (priv->active_row);
2257       active_item = gtk_tree_path_get_indices (path)[0];
2258       gtk_tree_path_free (path);
2259
2260       if (priv->add_tearoffs)
2261         active_item++;
2262     }
2263
2264   /* FIXME handle nested menus better */
2265   gtk_menu_set_active (GTK_MENU (priv->popup_widget), active_item);
2266
2267   if (priv->wrap_width == 0)
2268     {
2269       GtkAllocation allocation;
2270
2271       gtk_widget_get_allocation (GTK_WIDGET (combo_box), &allocation);
2272       width = allocation.width;
2273       gtk_widget_set_size_request (priv->popup_widget, -1, -1);
2274       gtk_widget_get_preferred_width (priv->popup_widget, &min_width, &nat_width);
2275
2276       if (combo_box->priv->popup_fixed_width)
2277         width = MAX (width, min_width);
2278       else
2279         width = MAX (width, nat_width);
2280
2281       gtk_widget_set_size_request (priv->popup_widget, width, -1);
2282     }
2283
2284   gtk_menu_popup (GTK_MENU (priv->popup_widget),
2285                   NULL, NULL,
2286                   gtk_combo_box_menu_position, combo_box,
2287                   button, activate_time);
2288 }
2289
2290 static gboolean
2291 popup_grab_on_window (GdkWindow *window,
2292                       GdkDevice *keyboard,
2293                       GdkDevice *pointer,
2294                       guint32    activate_time)
2295 {
2296   if (keyboard &&
2297       gdk_device_grab (keyboard, window,
2298                        GDK_OWNERSHIP_WINDOW, TRUE,
2299                        GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK,
2300                        NULL, activate_time) != GDK_GRAB_SUCCESS)
2301     return FALSE;
2302
2303   if (pointer &&
2304       gdk_device_grab (pointer, window,
2305                        GDK_OWNERSHIP_WINDOW, TRUE,
2306                        GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
2307                        GDK_POINTER_MOTION_MASK,
2308                        NULL, activate_time) != GDK_GRAB_SUCCESS)
2309     {
2310       if (keyboard)
2311         gdk_device_ungrab (keyboard, activate_time);
2312
2313       return FALSE;
2314     }
2315
2316   return TRUE;
2317 }
2318
2319 /**
2320  * gtk_combo_box_popup:
2321  * @combo_box: a #GtkComboBox
2322  *
2323  * Pops up the menu or dropdown list of @combo_box.
2324  *
2325  * This function is mostly intended for use by accessibility technologies;
2326  * applications should have little use for it.
2327  *
2328  * Since: 2.4
2329  */
2330 void
2331 gtk_combo_box_popup (GtkComboBox *combo_box)
2332 {
2333   g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
2334
2335   g_signal_emit (combo_box, combo_box_signals[POPUP], 0);
2336 }
2337
2338 /**
2339  * gtk_combo_box_popup_for_device:
2340  * @combo_box: a #GtkComboBox
2341  * @device: a #GdkDevice
2342  *
2343  * Pops up the menu or dropdown list of @combo_box, the popup window
2344  * will be grabbed so only @device and its associated pointer/keyboard
2345  * are the only #GdkDevice<!-- -->s able to send events to it.
2346  *
2347  * Since: 3.0
2348  **/
2349 void
2350 gtk_combo_box_popup_for_device (GtkComboBox *combo_box,
2351                                 GdkDevice   *device)
2352 {
2353   GtkComboBoxPrivate *priv = combo_box->priv;
2354   gint x, y, width, height;
2355   GtkTreePath *path = NULL, *ppath;
2356   GtkWidget *toplevel;
2357   GdkDevice *keyboard, *pointer;
2358   guint32 time;
2359
2360   g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
2361   g_return_if_fail (GDK_IS_DEVICE (device));
2362
2363   if (!gtk_widget_get_realized (GTK_WIDGET (combo_box)))
2364     return;
2365
2366   if (gtk_widget_get_mapped (priv->popup_widget))
2367     return;
2368
2369   if (priv->grab_pointer && priv->grab_keyboard)
2370     return;
2371
2372   time = gtk_get_current_event_time ();
2373
2374   if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
2375     {
2376       keyboard = device;
2377       pointer = gdk_device_get_associated_device (device);
2378     }
2379   else
2380     {
2381       pointer = device;
2382       keyboard = gdk_device_get_associated_device (device);
2383     }
2384
2385   if (GTK_IS_MENU (priv->popup_widget))
2386     {
2387       gtk_combo_box_menu_popup (combo_box,
2388                                 priv->activate_button,
2389                                 priv->activate_time);
2390       return;
2391     }
2392
2393   toplevel = gtk_widget_get_toplevel (GTK_WIDGET (combo_box));
2394   if (GTK_IS_WINDOW (toplevel))
2395     gtk_window_group_add_window (gtk_window_get_group (GTK_WINDOW (toplevel)),
2396                                  GTK_WINDOW (priv->popup_window));
2397
2398   gtk_widget_show_all (priv->scrolled_window);
2399   gtk_combo_box_list_position (combo_box, &x, &y, &width, &height);
2400
2401   gtk_widget_set_size_request (priv->popup_window, width, height);
2402   gtk_window_move (GTK_WINDOW (priv->popup_window), x, y);
2403
2404   if (gtk_tree_row_reference_valid (priv->active_row))
2405     {
2406       path = gtk_tree_row_reference_get_path (priv->active_row);
2407       ppath = gtk_tree_path_copy (path);
2408       if (gtk_tree_path_up (ppath))
2409         gtk_tree_view_expand_to_path (GTK_TREE_VIEW (priv->tree_view),
2410                                       ppath);
2411       gtk_tree_path_free (ppath);
2412     }
2413   gtk_tree_view_set_hover_expand (GTK_TREE_VIEW (priv->tree_view),
2414                                   TRUE);
2415
2416   /* popup */
2417   gtk_widget_show (priv->popup_window);
2418
2419   if (path)
2420     {
2421       gtk_tree_view_set_cursor (GTK_TREE_VIEW (priv->tree_view),
2422                                 path, NULL, FALSE);
2423       gtk_tree_path_free (path);
2424     }
2425
2426   gtk_widget_grab_focus (priv->popup_window);
2427   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (priv->button),
2428                                 TRUE);
2429
2430   if (!gtk_widget_has_focus (priv->tree_view))
2431     gtk_widget_grab_focus (priv->tree_view);
2432
2433   if (!popup_grab_on_window (gtk_widget_get_window (priv->popup_window),
2434                              keyboard, pointer, time))
2435     {
2436       gtk_widget_hide (priv->popup_window);
2437       return;
2438     }
2439
2440   gtk_device_grab_add (priv->popup_window, pointer, TRUE);
2441   priv->grab_pointer = pointer;
2442   priv->grab_keyboard = keyboard;
2443 }
2444
2445 static void
2446 gtk_combo_box_real_popup (GtkComboBox *combo_box)
2447 {
2448   GdkDevice *device;
2449
2450   device = gtk_get_current_event_device ();
2451
2452   if (!device)
2453     {
2454       GdkDeviceManager *device_manager;
2455       GdkDisplay *display;
2456       GList *devices;
2457
2458       display = gtk_widget_get_display (GTK_WIDGET (combo_box));
2459       device_manager = gdk_display_get_device_manager (display);
2460
2461       /* No device was set, pick the first master device */
2462       devices = gdk_device_manager_list_devices (device_manager, GDK_DEVICE_TYPE_MASTER);
2463       device = devices->data;
2464       g_list_free (devices);
2465     }
2466
2467   gtk_combo_box_popup_for_device (combo_box, device);
2468 }
2469
2470 static gboolean
2471 gtk_combo_box_real_popdown (GtkComboBox *combo_box)
2472 {
2473   if (combo_box->priv->popup_shown)
2474     {
2475       gtk_combo_box_popdown (combo_box);
2476       return TRUE;
2477     }
2478
2479   return FALSE;
2480 }
2481
2482 /**
2483  * gtk_combo_box_popdown:
2484  * @combo_box: a #GtkComboBox
2485  *
2486  * Hides the menu or dropdown list of @combo_box.
2487  *
2488  * This function is mostly intended for use by accessibility technologies;
2489  * applications should have little use for it.
2490  *
2491  * Since: 2.4
2492  */
2493 void
2494 gtk_combo_box_popdown (GtkComboBox *combo_box)
2495 {
2496   GtkComboBoxPrivate *priv = combo_box->priv;
2497
2498   g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
2499
2500   if (GTK_IS_MENU (priv->popup_widget))
2501     {
2502       gtk_menu_popdown (GTK_MENU (priv->popup_widget));
2503       return;
2504     }
2505
2506   if (!gtk_widget_get_realized (GTK_WIDGET (combo_box)))
2507     return;
2508
2509   gtk_device_grab_remove (priv->popup_window, priv->grab_pointer);
2510   gtk_widget_hide (priv->popup_window);
2511   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (priv->button),
2512                                 FALSE);
2513
2514   priv->grab_pointer = NULL;
2515   priv->grab_keyboard = NULL;
2516 }
2517
2518 #define GTK_COMBO_BOX_SIZE_ALLOCATE_BUTTON                                         \
2519   gtk_widget_get_preferred_size (combo_box->priv->button,                        \
2520                                  &req, NULL);                                         \
2521                                                                                   \
2522   if (is_rtl)                                                                         \
2523     child.x = allocation->x + padding.right;                                        \
2524   else                                                                                \
2525     child.x = allocation->x + allocation->width - req.width - padding.left;        \
2526                                                                                     \
2527   child.y = allocation->y + padding.top;                                                \
2528   child.width = req.width;                                                        \
2529   child.height = allocation->height - (padding.top + padding.bottom);                \
2530   child.width = MAX (1, child.width);                                                \
2531   child.height = MAX (1, child.height);                                                \
2532                                                                                   \
2533   gtk_widget_size_allocate (combo_box->priv->button, &child);
2534
2535
2536 static void
2537 gtk_combo_box_size_allocate (GtkWidget     *widget,
2538                              GtkAllocation *allocation)
2539 {
2540   GtkComboBox *combo_box = GTK_COMBO_BOX (widget);
2541   GtkComboBoxPrivate *priv = combo_box->priv;
2542   GtkWidget *child_widget;
2543   GtkAllocation child;
2544   GtkRequisition req;
2545   gboolean is_rtl = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL;
2546   GtkBorder padding;
2547
2548   gtk_widget_set_allocation (widget, allocation);
2549   child_widget = gtk_bin_get_child (GTK_BIN (widget));
2550   get_widget_padding_and_border (widget, &padding);
2551
2552   if (!priv->tree_view)
2553     {
2554       if (priv->cell_view)
2555         {
2556           GtkBorder button_padding;
2557           gint width;
2558           guint border_width;
2559
2560           gtk_widget_size_allocate (priv->button, allocation);
2561
2562           /* menu mode */
2563           allocation->x += padding.left;
2564           allocation->y += padding.top;
2565           allocation->width -= padding.left + padding.right;
2566           allocation->height -= padding.top + padding.bottom;
2567
2568           /* set some things ready */
2569           border_width = gtk_container_get_border_width (GTK_CONTAINER (priv->button));
2570           get_widget_padding_and_border (priv->button, &button_padding);
2571
2572           child.x = allocation->x;
2573           child.y = allocation->y;
2574           width = allocation->width;
2575           child.height = allocation->height;
2576
2577           if (!priv->is_cell_renderer)
2578             {
2579               child.x += border_width + button_padding.left;
2580               child.y += border_width + button_padding.top;
2581               width -= 2 * border_width +
2582                 button_padding.left + button_padding.right;
2583               child.height -= 2 * border_width +
2584                 button_padding.top + button_padding.bottom;
2585             }
2586
2587           /* handle the children */
2588           gtk_widget_get_preferred_size (priv->box, &req, NULL);
2589           child.width = req.width;
2590           if (!is_rtl)
2591             child.x += width - req.width;
2592           child.width = MAX (1, child.width);
2593           child.height = MAX (1, child.height);
2594           gtk_widget_size_allocate (priv->box, &child);
2595
2596           if (is_rtl)
2597             {
2598               child.x += req.width;
2599               child.width = allocation->x + allocation->width
2600                 - border_width - child.x;
2601             }
2602           else
2603             {
2604               child.width = child.x;
2605               child.x = allocation->x
2606                 + border_width + button_padding.left;
2607               child.width -= child.x;
2608             }
2609
2610           if (gtk_widget_get_visible (priv->popup_widget))
2611             {
2612               gint width, menu_width;
2613
2614               if (priv->wrap_width == 0)
2615                 {
2616                   GtkAllocation combo_box_allocation;
2617
2618                   gtk_widget_get_allocation (GTK_WIDGET (combo_box), &combo_box_allocation);
2619                   width = combo_box_allocation.width;
2620                   gtk_widget_set_size_request (priv->popup_widget, -1, -1);
2621
2622                   if (combo_box->priv->popup_fixed_width)
2623                     gtk_widget_get_preferred_width (priv->popup_widget, &menu_width, NULL);
2624                   else
2625                     gtk_widget_get_preferred_width (priv->popup_widget, NULL, &menu_width);
2626
2627                   gtk_widget_set_size_request (priv->popup_widget,
2628                                                MAX (width, menu_width), -1);
2629                }
2630
2631               /* reposition the menu after giving it a new width */
2632               gtk_menu_reposition (GTK_MENU (priv->popup_widget));
2633             }
2634
2635           child.width = MAX (1, child.width);
2636           child.height = MAX (1, child.height);
2637           gtk_widget_size_allocate (child_widget, &child);
2638         }
2639       else
2640         {
2641           GTK_COMBO_BOX_SIZE_ALLOCATE_BUTTON
2642
2643           if (is_rtl)
2644             child.x = allocation->x + req.width + padding.right;
2645           else
2646             child.x = allocation->x + padding.left;
2647           child.y = allocation->y + padding.top;
2648           child.width = allocation->width - req.width - (padding.left + padding.right);
2649           child.width = MAX (1, child.width);
2650           child.height = MAX (1, child.height);
2651           gtk_widget_size_allocate (child_widget, &child);
2652         }
2653     }
2654   else
2655     {
2656       /* list mode */
2657       guint border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
2658
2659       /* button */
2660       GTK_COMBO_BOX_SIZE_ALLOCATE_BUTTON
2661
2662       /* frame */
2663       if (is_rtl)
2664         child.x = allocation->x + req.width;
2665       else
2666         child.x = allocation->x;
2667
2668       child.y = allocation->y;
2669       child.width = allocation->width - req.width;
2670       child.height = allocation->height;
2671
2672       if (priv->cell_view_frame)
2673         {
2674           child.x += padding.left + border_width;
2675           child.y += padding.top + border_width;
2676           child.width = MAX (1, child.width - (2 * border_width) - (padding.left + padding.right));
2677           child.height = MAX (1, child.height - (2 * border_width) - (padding.top + padding.bottom));
2678           gtk_widget_size_allocate (priv->cell_view_frame, &child);
2679
2680           /* the sample */
2681           if (priv->has_frame)
2682             {
2683               GtkBorder frame_padding;
2684
2685               border_width = gtk_container_get_border_width (GTK_CONTAINER (priv->cell_view_frame));
2686               get_widget_padding_and_border (priv->cell_view_frame, &frame_padding);
2687
2688               child.x += border_width + frame_padding.left;
2689               child.y += border_width + frame_padding.right;
2690               child.width -= (2 * border_width) + frame_padding.left + frame_padding.right;
2691               child.height -= (2 * border_width) + frame_padding.top + frame_padding.bottom;
2692             }
2693         }
2694       else
2695         {
2696           child.x += padding.left + border_width;
2697           child.y += padding.top + border_width;
2698           child.width -= (2 * border_width) - (padding.left + padding.right);
2699           child.height -= (2 * border_width) - (padding.top + padding.bottom);
2700         }
2701
2702       if (gtk_widget_get_visible (priv->popup_window))
2703         {
2704           gint x, y, width, height;
2705           gtk_combo_box_list_position (combo_box, &x, &y, &width, &height);
2706           gtk_window_move (GTK_WINDOW (priv->popup_window), x, y);
2707           gtk_widget_set_size_request (priv->popup_window, width, height);
2708         }
2709
2710       child.width = MAX (1, child.width);
2711       child.height = MAX (1, child.height);
2712       gtk_widget_size_allocate (child_widget, &child);
2713     }
2714 }
2715
2716 #undef GTK_COMBO_BOX_ALLOCATE_BUTTON
2717
2718 static void
2719 gtk_combo_box_unset_model (GtkComboBox *combo_box)
2720 {
2721   GtkComboBoxPrivate *priv = combo_box->priv;
2722
2723   if (priv->model)
2724     {
2725       g_signal_handler_disconnect (priv->model,
2726                                    priv->inserted_id);
2727       g_signal_handler_disconnect (priv->model,
2728                                    priv->deleted_id);
2729       g_signal_handler_disconnect (priv->model,
2730                                    priv->reordered_id);
2731       g_signal_handler_disconnect (priv->model,
2732                                    priv->changed_id);
2733     }
2734
2735   if (priv->model)
2736     {
2737       g_object_unref (priv->model);
2738       priv->model = NULL;
2739     }
2740
2741   if (priv->active_row)
2742     {
2743       gtk_tree_row_reference_free (priv->active_row);
2744       priv->active_row = NULL;
2745     }
2746
2747   if (priv->cell_view)
2748     gtk_cell_view_set_model (GTK_CELL_VIEW (priv->cell_view), NULL);
2749 }
2750
2751 static void
2752 gtk_combo_box_forall (GtkContainer *container,
2753                       gboolean      include_internals,
2754                       GtkCallback   callback,
2755                       gpointer      callback_data)
2756 {
2757   GtkComboBox *combo_box = GTK_COMBO_BOX (container);
2758   GtkComboBoxPrivate *priv = combo_box->priv;
2759   GtkWidget *child;
2760
2761   if (include_internals)
2762     {
2763       if (priv->button)
2764         (* callback) (priv->button, callback_data);
2765       if (priv->cell_view_frame)
2766         (* callback) (priv->cell_view_frame, callback_data);
2767     }
2768
2769   child = gtk_bin_get_child (GTK_BIN (container));
2770   if (child)
2771     (* callback) (child, callback_data);
2772 }
2773
2774 static void
2775 gtk_combo_box_child_show (GtkWidget *widget,
2776                           GtkComboBox *combo_box)
2777 {
2778   GtkComboBoxPrivate *priv = combo_box->priv;
2779
2780   priv->popup_shown = TRUE;
2781   g_object_notify (G_OBJECT (combo_box), "popup-shown");
2782 }
2783
2784 static void
2785 gtk_combo_box_child_hide (GtkWidget *widget,
2786                           GtkComboBox *combo_box)
2787 {
2788   GtkComboBoxPrivate *priv = combo_box->priv;
2789
2790   priv->popup_shown = FALSE;
2791   g_object_notify (G_OBJECT (combo_box), "popup-shown");
2792 }
2793
2794 static gboolean
2795 gtk_combo_box_draw (GtkWidget *widget,
2796                     cairo_t   *cr)
2797 {
2798   GtkComboBox *combo_box = GTK_COMBO_BOX (widget);
2799   GtkComboBoxPrivate *priv = combo_box->priv;
2800
2801   if (priv->shadow_type != GTK_SHADOW_NONE)
2802     {
2803       GtkStyleContext *context;
2804
2805       context = gtk_widget_get_style_context (widget);
2806
2807       gtk_render_background (context, cr, 0, 0,
2808                              gtk_widget_get_allocated_width (widget),
2809                              gtk_widget_get_allocated_height (widget));
2810       gtk_render_frame (context, cr, 0, 0,
2811                         gtk_widget_get_allocated_width (widget),
2812                         gtk_widget_get_allocated_height (widget));
2813     }
2814
2815   gtk_container_propagate_draw (GTK_CONTAINER (widget),
2816                                 priv->button, cr);
2817
2818   if (priv->tree_view && priv->cell_view_frame)
2819     {
2820       gtk_container_propagate_draw (GTK_CONTAINER (widget),
2821                                     priv->cell_view_frame, cr);
2822     }
2823
2824   gtk_container_propagate_draw (GTK_CONTAINER (widget),
2825                                 gtk_bin_get_child (GTK_BIN (widget)),
2826                                 cr);
2827
2828   return FALSE;
2829 }
2830
2831 typedef struct {
2832   GtkComboBox *combo;
2833   GtkTreePath *path;
2834   GtkTreeIter iter;
2835   gboolean found;
2836   gboolean set;
2837   gboolean visible;
2838 } SearchData;
2839
2840 static gboolean
2841 path_visible (GtkTreeView *view,
2842               GtkTreePath *path)
2843 {
2844   GtkRBTree *tree;
2845   GtkRBNode *node;
2846
2847   /* Note that we rely on the fact that collapsed rows don't have nodes
2848    */
2849   return _gtk_tree_view_find_node (view, path, &tree, &node);
2850 }
2851
2852 static gboolean
2853 tree_next_func (GtkTreeModel *model,
2854                 GtkTreePath  *path,
2855                 GtkTreeIter  *iter,
2856                 gpointer      data)
2857 {
2858   SearchData *search_data = (SearchData *)data;
2859
2860   if (search_data->found)
2861     {
2862       if (!tree_column_row_is_sensitive (search_data->combo, iter))
2863         return FALSE;
2864
2865       if (search_data->visible &&
2866           !path_visible (GTK_TREE_VIEW (search_data->combo->priv->tree_view), path))
2867         return FALSE;
2868
2869       search_data->set = TRUE;
2870       search_data->iter = *iter;
2871
2872       return TRUE;
2873     }
2874
2875   if (gtk_tree_path_compare (path, search_data->path) == 0)
2876     search_data->found = TRUE;
2877
2878   return FALSE;
2879 }
2880
2881 static gboolean
2882 tree_next (GtkComboBox  *combo,
2883            GtkTreeModel *model,
2884            GtkTreeIter  *iter,
2885            GtkTreeIter  *next,
2886            gboolean      visible)
2887 {
2888   SearchData search_data;
2889
2890   search_data.combo = combo;
2891   search_data.path = gtk_tree_model_get_path (model, iter);
2892   search_data.visible = visible;
2893   search_data.found = FALSE;
2894   search_data.set = FALSE;
2895
2896   gtk_tree_model_foreach (model, tree_next_func, &search_data);
2897
2898   *next = search_data.iter;
2899
2900   gtk_tree_path_free (search_data.path);
2901
2902   return search_data.set;
2903 }
2904
2905 static gboolean
2906 tree_prev_func (GtkTreeModel *model,
2907                 GtkTreePath  *path,
2908                 GtkTreeIter  *iter,
2909                 gpointer      data)
2910 {
2911   SearchData *search_data = (SearchData *)data;
2912
2913   if (gtk_tree_path_compare (path, search_data->path) == 0)
2914     {
2915       search_data->found = TRUE;
2916       return TRUE;
2917     }
2918
2919   if (!tree_column_row_is_sensitive (search_data->combo, iter))
2920     return FALSE;
2921
2922   if (search_data->visible &&
2923       !path_visible (GTK_TREE_VIEW (search_data->combo->priv->tree_view), path))
2924     return FALSE;
2925
2926   search_data->set = TRUE;
2927   search_data->iter = *iter;
2928
2929   return FALSE;
2930 }
2931
2932 static gboolean
2933 tree_prev (GtkComboBox  *combo,
2934            GtkTreeModel *model,
2935            GtkTreeIter  *iter,
2936            GtkTreeIter  *prev,
2937            gboolean      visible)
2938 {
2939   SearchData search_data;
2940
2941   search_data.combo = combo;
2942   search_data.path = gtk_tree_model_get_path (model, iter);
2943   search_data.visible = visible;
2944   search_data.found = FALSE;
2945   search_data.set = FALSE;
2946
2947   gtk_tree_model_foreach (model, tree_prev_func, &search_data);
2948
2949   *prev = search_data.iter;
2950
2951   gtk_tree_path_free (search_data.path);
2952
2953   return search_data.set;
2954 }
2955
2956 static gboolean
2957 tree_last_func (GtkTreeModel *model,
2958                 GtkTreePath  *path,
2959                 GtkTreeIter  *iter,
2960                 gpointer      data)
2961 {
2962   SearchData *search_data = (SearchData *)data;
2963
2964   if (!tree_column_row_is_sensitive (search_data->combo, iter))
2965     return FALSE;
2966
2967   /* Note that we rely on the fact that collapsed rows don't have nodes
2968    */
2969   if (search_data->visible &&
2970       !path_visible (GTK_TREE_VIEW (search_data->combo->priv->tree_view), path))
2971     return FALSE;
2972
2973   search_data->set = TRUE;
2974   search_data->iter = *iter;
2975
2976   return FALSE;
2977 }
2978
2979 static gboolean
2980 tree_last (GtkComboBox  *combo,
2981            GtkTreeModel *model,
2982            GtkTreeIter  *last,
2983            gboolean      visible)
2984 {
2985   SearchData search_data;
2986
2987   search_data.combo = combo;
2988   search_data.visible = visible;
2989   search_data.set = FALSE;
2990
2991   gtk_tree_model_foreach (model, tree_last_func, &search_data);
2992
2993   *last = search_data.iter;
2994
2995   return search_data.set;
2996 }
2997
2998
2999 static gboolean
3000 tree_first_func (GtkTreeModel *model,
3001                  GtkTreePath  *path,
3002                  GtkTreeIter  *iter,
3003                  gpointer      data)
3004 {
3005   SearchData *search_data = (SearchData *)data;
3006
3007   if (!tree_column_row_is_sensitive (search_data->combo, iter))
3008     return FALSE;
3009
3010   if (search_data->visible &&
3011       !path_visible (GTK_TREE_VIEW (search_data->combo->priv->tree_view), path))
3012     return FALSE;
3013
3014   search_data->set = TRUE;
3015   search_data->iter = *iter;
3016
3017   return TRUE;
3018 }
3019
3020 static gboolean
3021 tree_first (GtkComboBox  *combo,
3022             GtkTreeModel *model,
3023             GtkTreeIter  *first,
3024             gboolean      visible)
3025 {
3026   SearchData search_data;
3027
3028   search_data.combo = combo;
3029   search_data.visible = visible;
3030   search_data.set = FALSE;
3031
3032   gtk_tree_model_foreach (model, tree_first_func, &search_data);
3033
3034   *first = search_data.iter;
3035
3036   return search_data.set;
3037 }
3038
3039 static gboolean
3040 gtk_combo_box_scroll_event (GtkWidget          *widget,
3041                             GdkEventScroll     *event)
3042 {
3043   GtkComboBox *combo_box = GTK_COMBO_BOX (widget);
3044   gboolean found;
3045   GtkTreeIter iter;
3046   GtkTreeIter new_iter;
3047
3048   if (!gtk_combo_box_get_active_iter (combo_box, &iter))
3049     return TRUE;
3050
3051   if (event->direction == GDK_SCROLL_UP)
3052     found = tree_prev (combo_box, combo_box->priv->model,
3053                        &iter, &new_iter, FALSE);
3054   else
3055     found = tree_next (combo_box, combo_box->priv->model,
3056                        &iter, &new_iter, FALSE);
3057
3058   if (found)
3059     gtk_combo_box_set_active_iter (combo_box, &new_iter);
3060
3061   return TRUE;
3062 }
3063
3064 /*
3065  * menu style
3066  */
3067 static gboolean
3068 gtk_combo_box_row_separator_func (GtkTreeModel      *model,
3069                                   GtkTreeIter       *iter,
3070                                   GtkComboBox       *combo)
3071 {
3072   GtkComboBoxPrivate *priv = combo->priv;
3073
3074   if (priv->row_separator_func)
3075     return priv->row_separator_func (model, iter, priv->row_separator_data);
3076
3077   return FALSE;
3078 }
3079
3080 static gboolean
3081 gtk_combo_box_header_func (GtkTreeModel      *model,
3082                            GtkTreeIter       *iter,
3083                            GtkComboBox       *combo)
3084 {
3085   /* Every submenu has a selectable header, however we
3086    * can expose a method to make that configurable by
3087    * the user (like row_separator_func is done) */
3088   return TRUE;
3089 }
3090
3091 static void
3092 gtk_combo_box_menu_setup (GtkComboBox *combo_box,
3093                           gboolean     add_children)
3094 {
3095   GtkComboBoxPrivate *priv = combo_box->priv;
3096   GtkWidget *child;
3097   GtkWidget *menu;
3098
3099   child = gtk_bin_get_child (GTK_BIN (combo_box));
3100
3101   if (priv->cell_view)
3102     {
3103       priv->button = gtk_toggle_button_new ();
3104       gtk_button_set_focus_on_click (GTK_BUTTON (priv->button),
3105                                      priv->focus_on_click);
3106
3107       g_signal_connect (priv->button, "toggled",
3108                         G_CALLBACK (gtk_combo_box_button_toggled), combo_box);
3109       gtk_widget_set_parent (priv->button,
3110                              gtk_widget_get_parent (child));
3111
3112       priv->box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
3113       gtk_container_add (GTK_CONTAINER (priv->button), priv->box);
3114
3115       priv->separator = gtk_separator_new (GTK_ORIENTATION_VERTICAL);
3116       gtk_container_add (GTK_CONTAINER (priv->box), priv->separator);
3117
3118       priv->arrow = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_NONE);
3119       gtk_container_add (GTK_CONTAINER (priv->box), priv->arrow);
3120
3121       gtk_widget_show_all (priv->button);
3122     }
3123   else
3124     {
3125       priv->button = gtk_toggle_button_new ();
3126       gtk_button_set_focus_on_click (GTK_BUTTON (priv->button),
3127                                      priv->focus_on_click);
3128
3129       g_signal_connect (priv->button, "toggled",
3130                         G_CALLBACK (gtk_combo_box_button_toggled), combo_box);
3131       gtk_widget_set_parent (priv->button,
3132                              gtk_widget_get_parent (child));
3133
3134       priv->arrow = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_NONE);
3135       gtk_container_add (GTK_CONTAINER (priv->button), priv->arrow);
3136       gtk_widget_show_all (priv->button);
3137     }
3138
3139   g_signal_connect (priv->button, "button-press-event",
3140                     G_CALLBACK (gtk_combo_box_menu_button_press),
3141                     combo_box);
3142   g_signal_connect (priv->button, "state-flags-changed",
3143                     G_CALLBACK (gtk_combo_box_button_state_flags_changed),
3144                     combo_box);
3145
3146   /* create our funky menu */
3147   menu = _gtk_tree_menu_new_with_area (priv->area);
3148   gtk_widget_set_name (menu, "gtk-combobox-popup-menu");
3149
3150   _gtk_tree_menu_set_model (GTK_TREE_MENU (menu), priv->model);
3151
3152   _gtk_tree_menu_set_wrap_width (GTK_TREE_MENU (menu), priv->wrap_width);
3153   _gtk_tree_menu_set_row_span_column (GTK_TREE_MENU (menu), priv->row_column);
3154   _gtk_tree_menu_set_column_span_column (GTK_TREE_MENU (menu), priv->col_column);
3155   _gtk_tree_menu_set_tearoff (GTK_TREE_MENU (menu),
3156                               combo_box->priv->add_tearoffs);
3157
3158   g_signal_connect (menu, "menu-activate",
3159                     G_CALLBACK (gtk_combo_box_menu_activate), combo_box);
3160
3161   /* Chain our row_separator_func through */
3162   _gtk_tree_menu_set_row_separator_func (GTK_TREE_MENU (menu),
3163                                          (GtkTreeViewRowSeparatorFunc)gtk_combo_box_row_separator_func,
3164                                          combo_box, NULL);
3165
3166   _gtk_tree_menu_set_header_func (GTK_TREE_MENU (menu),
3167                                   (GtkTreeMenuHeaderFunc)gtk_combo_box_header_func,
3168                                   combo_box, NULL);
3169
3170   g_signal_connect (menu, "key-press-event",
3171                     G_CALLBACK (gtk_combo_box_menu_key_press), combo_box);
3172   gtk_combo_box_set_popup_widget (combo_box, menu);
3173
3174   gtk_combo_box_update_title (combo_box);
3175 }
3176
3177 static void
3178 gtk_combo_box_menu_destroy (GtkComboBox *combo_box)
3179 {
3180   GtkComboBoxPrivate *priv = combo_box->priv;
3181
3182   g_signal_handlers_disconnect_matched (priv->button,
3183                                         G_SIGNAL_MATCH_DATA,
3184                                         0, 0, NULL,
3185                                         gtk_combo_box_menu_button_press, NULL);
3186   g_signal_handlers_disconnect_matched (priv->button,
3187                                         G_SIGNAL_MATCH_DATA,
3188                                         0, 0, NULL,
3189                                         gtk_combo_box_button_state_flags_changed, combo_box);
3190   g_signal_handlers_disconnect_matched (priv->popup_widget,
3191                                         G_SIGNAL_MATCH_DATA,
3192                                         0, 0, NULL,
3193                                         gtk_combo_box_menu_activate, combo_box);
3194
3195   /* unparent will remove our latest ref */
3196   gtk_widget_unparent (priv->button);
3197
3198   priv->box = NULL;
3199   priv->button = NULL;
3200   priv->arrow = NULL;
3201   priv->separator = NULL;
3202
3203   /* changing the popup window will unref the menu and the children */
3204 }
3205
3206 /* callbacks */
3207 static gboolean
3208 gtk_combo_box_menu_button_press (GtkWidget      *widget,
3209                                  GdkEventButton *event,
3210                                  gpointer        user_data)
3211 {
3212   GtkComboBox *combo_box = GTK_COMBO_BOX (user_data);
3213   GtkComboBoxPrivate *priv = combo_box->priv;
3214
3215   if (GTK_IS_MENU (priv->popup_widget) &&
3216       event->type == GDK_BUTTON_PRESS && event->button == GDK_BUTTON_PRIMARY)
3217     {
3218       if (priv->focus_on_click &&
3219           !gtk_widget_has_focus (priv->button))
3220         gtk_widget_grab_focus (priv->button);
3221
3222       gtk_combo_box_menu_popup (combo_box, event->button, event->time);
3223
3224       return TRUE;
3225     }
3226
3227   return FALSE;
3228 }
3229
3230 static void
3231 gtk_combo_box_menu_activate (GtkWidget   *menu,
3232                              const gchar *path,
3233                              GtkComboBox *combo_box)
3234 {
3235   GtkTreeIter iter;
3236
3237   if (gtk_tree_model_get_iter_from_string (combo_box->priv->model, &iter, path))
3238     gtk_combo_box_set_active_iter (combo_box, &iter);
3239
3240   g_object_set (combo_box,
3241                 "editing-canceled", FALSE,
3242                 NULL);
3243 }
3244
3245
3246 static void
3247 gtk_combo_box_update_sensitivity (GtkComboBox *combo_box)
3248 {
3249   GtkTreeIter iter;
3250   gboolean sensitive = TRUE; /* fool code checkers */
3251
3252   if (!combo_box->priv->button)
3253     return;
3254
3255   switch (combo_box->priv->button_sensitivity)
3256     {
3257       case GTK_SENSITIVITY_ON:
3258         sensitive = TRUE;
3259         break;
3260       case GTK_SENSITIVITY_OFF:
3261         sensitive = FALSE;
3262         break;
3263       case GTK_SENSITIVITY_AUTO:
3264         sensitive = combo_box->priv->model &&
3265                     gtk_tree_model_get_iter_first (combo_box->priv->model, &iter);
3266         break;
3267       default:
3268         g_assert_not_reached ();
3269         break;
3270     }
3271
3272   gtk_widget_set_sensitive (combo_box->priv->button, sensitive);
3273
3274   /* In list-mode, we also need to update sensitivity of the event box */
3275   if (GTK_IS_TREE_VIEW (combo_box->priv->tree_view)
3276       && combo_box->priv->cell_view)
3277     gtk_widget_set_sensitive (combo_box->priv->box, sensitive);
3278 }
3279
3280 static void
3281 gtk_combo_box_model_row_inserted (GtkTreeModel     *model,
3282                                   GtkTreePath      *path,
3283                                   GtkTreeIter      *iter,
3284                                   gpointer          user_data)
3285 {
3286   GtkComboBox *combo_box = GTK_COMBO_BOX (user_data);
3287
3288   if (combo_box->priv->tree_view)
3289     gtk_combo_box_list_popup_resize (combo_box);
3290
3291   gtk_combo_box_update_sensitivity (combo_box);
3292 }
3293
3294 static void
3295 gtk_combo_box_model_row_deleted (GtkTreeModel     *model,
3296                                  GtkTreePath      *path,
3297                                  gpointer          user_data)
3298 {
3299   GtkComboBox *combo_box = GTK_COMBO_BOX (user_data);
3300   GtkComboBoxPrivate *priv = combo_box->priv;
3301
3302   if (!gtk_tree_row_reference_valid (priv->active_row))
3303     {
3304       if (priv->cell_view)
3305         gtk_cell_view_set_displayed_row (GTK_CELL_VIEW (priv->cell_view), NULL);
3306       g_signal_emit (combo_box, combo_box_signals[CHANGED], 0);
3307     }
3308
3309   if (priv->tree_view)
3310     gtk_combo_box_list_popup_resize (combo_box);
3311
3312   gtk_combo_box_update_sensitivity (combo_box);
3313 }
3314
3315 static void
3316 gtk_combo_box_model_rows_reordered (GtkTreeModel    *model,
3317                                     GtkTreePath     *path,
3318                                     GtkTreeIter     *iter,
3319                                     gint            *new_order,
3320                                     gpointer         user_data)
3321 {
3322   gtk_tree_row_reference_reordered (G_OBJECT (user_data), path, iter, new_order);
3323 }
3324
3325 static void
3326 gtk_combo_box_model_row_changed (GtkTreeModel     *model,
3327                                  GtkTreePath      *path,
3328                                  GtkTreeIter      *iter,
3329                                  gpointer          user_data)
3330 {
3331   GtkComboBox *combo_box = GTK_COMBO_BOX (user_data);
3332   GtkComboBoxPrivate *priv = combo_box->priv;
3333   GtkTreePath *active_path;
3334
3335   /* FIXME this belongs to GtkCellView */
3336   if (gtk_tree_row_reference_valid (priv->active_row))
3337     {
3338       active_path = gtk_tree_row_reference_get_path (priv->active_row);
3339       if (gtk_tree_path_compare (path, active_path) == 0 &&
3340           priv->cell_view)
3341         gtk_widget_queue_resize (GTK_WIDGET (priv->cell_view));
3342       gtk_tree_path_free (active_path);
3343     }
3344
3345   if (priv->tree_view)
3346     gtk_combo_box_list_row_changed (model, path, iter, user_data);
3347 }
3348
3349 static gboolean
3350 list_popup_resize_idle (gpointer user_data)
3351 {
3352   GtkComboBox *combo_box = GTK_COMBO_BOX (user_data);
3353   GtkComboBoxPrivate *priv = combo_box->priv;
3354   gint x, y, width, height;
3355
3356   if (priv->tree_view && gtk_widget_get_mapped (priv->popup_window))
3357     {
3358       gtk_combo_box_list_position (combo_box, &x, &y, &width, &height);
3359
3360       gtk_widget_set_size_request (priv->popup_window, width, height);
3361       gtk_window_move (GTK_WINDOW (priv->popup_window), x, y);
3362     }
3363
3364   priv->resize_idle_id = 0;
3365
3366   return FALSE;
3367 }
3368
3369 static void
3370 gtk_combo_box_list_popup_resize (GtkComboBox *combo_box)
3371 {
3372   GtkComboBoxPrivate *priv = combo_box->priv;
3373
3374   if (!priv->resize_idle_id)
3375     priv->resize_idle_id =
3376       gdk_threads_add_idle (list_popup_resize_idle, combo_box);
3377 }
3378
3379 static void
3380 gtk_combo_box_model_row_expanded (GtkTreeModel     *model,
3381                                   GtkTreePath      *path,
3382                                   GtkTreeIter      *iter,
3383                                   gpointer          user_data)
3384 {
3385   GtkComboBox *combo_box = GTK_COMBO_BOX (user_data);
3386
3387   gtk_combo_box_list_popup_resize (combo_box);
3388 }
3389
3390
3391 /*
3392  * list style
3393  */
3394
3395 static void
3396 gtk_combo_box_list_setup (GtkComboBox *combo_box)
3397 {
3398   GtkComboBoxPrivate *priv = combo_box->priv;
3399   GtkTreeSelection *sel;
3400   GtkWidget *child;
3401   GtkWidget *widget = GTK_WIDGET (combo_box);
3402
3403   priv->button = gtk_toggle_button_new ();
3404   child = gtk_bin_get_child (GTK_BIN (combo_box));
3405   gtk_widget_set_parent (priv->button,
3406                          gtk_widget_get_parent (child));
3407   g_signal_connect (priv->button, "button-press-event",
3408                     G_CALLBACK (gtk_combo_box_list_button_pressed), combo_box);
3409   g_signal_connect (priv->button, "toggled",
3410                     G_CALLBACK (gtk_combo_box_button_toggled), combo_box);
3411
3412   priv->arrow = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_NONE);
3413   gtk_container_add (GTK_CONTAINER (priv->button), priv->arrow);
3414   priv->separator = NULL;
3415   gtk_widget_show_all (priv->button);
3416
3417   if (priv->cell_view)
3418     {
3419       GtkStyleContext *context;
3420       GtkStateFlags state;
3421       GdkRGBA color;
3422
3423       context  = gtk_widget_get_style_context (widget);
3424       state = gtk_widget_get_state_flags (widget);
3425       gtk_style_context_get_background_color (context, state, &color);
3426
3427       gtk_cell_view_set_background_rgba (GTK_CELL_VIEW (priv->cell_view), &color);
3428
3429       priv->box = gtk_event_box_new ();
3430       gtk_event_box_set_visible_window (GTK_EVENT_BOX (priv->box),
3431                                         FALSE);
3432
3433       if (priv->has_frame)
3434         {
3435           priv->cell_view_frame = gtk_frame_new (NULL);
3436           gtk_frame_set_shadow_type (GTK_FRAME (priv->cell_view_frame),
3437                                      GTK_SHADOW_IN);
3438         }
3439       else
3440         {
3441           combo_box->priv->cell_view_frame = gtk_event_box_new ();
3442           gtk_event_box_set_visible_window (GTK_EVENT_BOX (combo_box->priv->cell_view_frame),
3443                                             FALSE);
3444         }
3445
3446       gtk_widget_set_parent (priv->cell_view_frame,
3447                              gtk_widget_get_parent (child));
3448       gtk_container_add (GTK_CONTAINER (priv->cell_view_frame), priv->box);
3449       gtk_widget_show_all (priv->cell_view_frame);
3450
3451       g_signal_connect (priv->box, "button-press-event",
3452                         G_CALLBACK (gtk_combo_box_list_button_pressed),
3453                         combo_box);
3454     }
3455
3456   priv->tree_view = gtk_tree_view_new ();
3457   sel = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
3458   gtk_tree_selection_set_mode (sel, GTK_SELECTION_BROWSE);
3459   gtk_tree_selection_set_select_function (sel,
3460                                           gtk_combo_box_list_select_func,
3461                                           NULL, NULL);
3462   gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view),
3463                                      FALSE);
3464   gtk_tree_view_set_hover_selection (GTK_TREE_VIEW (priv->tree_view),
3465                                      TRUE);
3466
3467   gtk_tree_view_set_row_separator_func (GTK_TREE_VIEW (priv->tree_view),
3468                                         (GtkTreeViewRowSeparatorFunc)gtk_combo_box_row_separator_func,
3469                                         combo_box, NULL);
3470
3471   if (priv->model)
3472     gtk_tree_view_set_model (GTK_TREE_VIEW (priv->tree_view), priv->model);
3473
3474   gtk_tree_view_append_column (GTK_TREE_VIEW (priv->tree_view),
3475                                gtk_tree_view_column_new_with_area (priv->area));
3476
3477   if (gtk_tree_row_reference_valid (priv->active_row))
3478     {
3479       GtkTreePath *path;
3480
3481       path = gtk_tree_row_reference_get_path (priv->active_row);
3482       gtk_tree_view_set_cursor (GTK_TREE_VIEW (priv->tree_view),
3483                                 path, NULL, FALSE);
3484       gtk_tree_path_free (path);
3485     }
3486
3487   /* set sample/popup widgets */
3488   gtk_combo_box_set_popup_widget (combo_box, priv->tree_view);
3489
3490   g_signal_connect (priv->tree_view, "key-press-event",
3491                     G_CALLBACK (gtk_combo_box_list_key_press),
3492                     combo_box);
3493   g_signal_connect (priv->tree_view, "enter-notify-event",
3494                     G_CALLBACK (gtk_combo_box_list_enter_notify),
3495                     combo_box);
3496   g_signal_connect (priv->tree_view, "row-expanded",
3497                     G_CALLBACK (gtk_combo_box_model_row_expanded),
3498                     combo_box);
3499   g_signal_connect (priv->tree_view, "row-collapsed",
3500                     G_CALLBACK (gtk_combo_box_model_row_expanded),
3501                     combo_box);
3502   g_signal_connect (priv->popup_window, "button-press-event",
3503                     G_CALLBACK (gtk_combo_box_list_button_pressed),
3504                     combo_box);
3505   g_signal_connect (priv->popup_window, "button-release-event",
3506                     G_CALLBACK (gtk_combo_box_list_button_released),
3507                     combo_box);
3508
3509   gtk_widget_show (priv->tree_view);
3510
3511   gtk_combo_box_update_sensitivity (combo_box);
3512 }
3513
3514 static void
3515 gtk_combo_box_list_destroy (GtkComboBox *combo_box)
3516 {
3517   GtkComboBoxPrivate *priv = combo_box->priv;
3518
3519   /* disconnect signals */
3520   g_signal_handlers_disconnect_matched (priv->tree_view,
3521                                         G_SIGNAL_MATCH_DATA,
3522                                         0, 0, NULL, NULL, combo_box);
3523   g_signal_handlers_disconnect_matched (priv->button,
3524                                         G_SIGNAL_MATCH_DATA,
3525                                         0, 0, NULL,
3526                                         gtk_combo_box_list_button_pressed,
3527                                         NULL);
3528   g_signal_handlers_disconnect_matched (priv->popup_window,
3529                                         G_SIGNAL_MATCH_DATA,
3530                                         0, 0, NULL,
3531                                         gtk_combo_box_list_button_pressed,
3532                                         NULL);
3533   g_signal_handlers_disconnect_matched (priv->popup_window,
3534                                         G_SIGNAL_MATCH_DATA,
3535                                         0, 0, NULL,
3536                                         gtk_combo_box_list_button_released,
3537                                         NULL);
3538
3539   g_signal_handlers_disconnect_matched (priv->popup_window,
3540                                         G_SIGNAL_MATCH_DATA,
3541                                         0, 0, NULL,
3542                                         gtk_combo_box_child_show,
3543                                         NULL);
3544
3545   g_signal_handlers_disconnect_matched (priv->popup_window,
3546                                         G_SIGNAL_MATCH_DATA,
3547                                         0, 0, NULL,
3548                                         gtk_combo_box_child_hide,
3549                                         NULL);
3550
3551   if (priv->box)
3552     g_signal_handlers_disconnect_matched (priv->box,
3553                                           G_SIGNAL_MATCH_DATA,
3554                                           0, 0, NULL,
3555                                           gtk_combo_box_list_button_pressed,
3556                                           NULL);
3557
3558   /* destroy things (unparent will kill the latest ref from us)
3559    * last unref on button will destroy the arrow
3560    */
3561   gtk_widget_unparent (priv->button);
3562   priv->button = NULL;
3563   priv->arrow = NULL;
3564
3565   if (priv->cell_view)
3566     {
3567       g_object_set (priv->cell_view,
3568                     "background-set", FALSE,
3569                     NULL);
3570     }
3571
3572   if (priv->cell_view_frame)
3573     {
3574       gtk_widget_unparent (priv->cell_view_frame);
3575       priv->cell_view_frame = NULL;
3576       priv->box = NULL;
3577     }
3578
3579   if (priv->scroll_timer)
3580     {
3581       g_source_remove (priv->scroll_timer);
3582       priv->scroll_timer = 0;
3583     }
3584
3585   if (priv->resize_idle_id)
3586     {
3587       g_source_remove (priv->resize_idle_id);
3588       priv->resize_idle_id = 0;
3589     }
3590
3591   gtk_widget_destroy (priv->tree_view);
3592
3593   priv->tree_view = NULL;
3594   if (priv->popup_widget)
3595     {
3596       g_object_unref (priv->popup_widget);
3597       priv->popup_widget = NULL;
3598     }
3599 }
3600
3601 /* callbacks */
3602
3603 static gboolean
3604 gtk_combo_box_list_button_pressed (GtkWidget      *widget,
3605                                    GdkEventButton *event,
3606                                    gpointer        data)
3607 {
3608   GtkComboBox *combo_box = GTK_COMBO_BOX (data);
3609   GtkComboBoxPrivate *priv = combo_box->priv;
3610
3611   GtkWidget *ewidget = gtk_get_event_widget ((GdkEvent *)event);
3612
3613   if (ewidget == priv->popup_window)
3614     return TRUE;
3615
3616   if ((ewidget != priv->button && ewidget != priv->box) ||
3617       gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (priv->button)))
3618     return FALSE;
3619
3620   if (priv->focus_on_click &&
3621       !gtk_widget_has_focus (priv->button))
3622     gtk_widget_grab_focus (priv->button);
3623
3624   gtk_combo_box_popup_for_device (combo_box, event->device);
3625
3626   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (priv->button), TRUE);
3627
3628   priv->auto_scroll = FALSE;
3629   if (priv->scroll_timer == 0)
3630     priv->scroll_timer = gdk_threads_add_timeout (SCROLL_TIME,
3631                                                   (GSourceFunc) gtk_combo_box_list_scroll_timeout,
3632                                                    combo_box);
3633
3634   priv->popup_in_progress = TRUE;
3635
3636   return TRUE;
3637 }
3638
3639 static gboolean
3640 gtk_combo_box_list_button_released (GtkWidget      *widget,
3641                                     GdkEventButton *event,
3642                                     gpointer        data)
3643 {
3644   gboolean ret;
3645   GtkTreePath *path = NULL;
3646   GtkTreeIter iter;
3647
3648   GtkComboBox *combo_box = GTK_COMBO_BOX (data);
3649   GtkComboBoxPrivate *priv = combo_box->priv;
3650
3651   gboolean popup_in_progress = FALSE;
3652
3653   GtkWidget *ewidget = gtk_get_event_widget ((GdkEvent *)event);
3654
3655   if (priv->popup_in_progress)
3656     {
3657       popup_in_progress = TRUE;
3658       priv->popup_in_progress = FALSE;
3659     }
3660
3661   gtk_tree_view_set_hover_expand (GTK_TREE_VIEW (priv->tree_view),
3662                                   FALSE);
3663   if (priv->scroll_timer)
3664     {
3665       g_source_remove (priv->scroll_timer);
3666       priv->scroll_timer = 0;
3667     }
3668
3669   if (ewidget != priv->tree_view)
3670     {
3671       if ((ewidget == priv->button ||
3672            ewidget == priv->box) &&
3673           !popup_in_progress &&
3674           gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (priv->button)))
3675         {
3676           gtk_combo_box_popdown (combo_box);
3677           return TRUE;
3678         }
3679
3680       /* released outside treeview */
3681       if (ewidget != priv->button && ewidget != priv->box)
3682         {
3683           gtk_combo_box_popdown (combo_box);
3684
3685           return TRUE;
3686         }
3687
3688       return FALSE;
3689     }
3690
3691   /* select something cool */
3692   ret = gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
3693                                        event->x, event->y,
3694                                        &path,
3695                                        NULL, NULL, NULL);
3696
3697   if (!ret)
3698     return TRUE; /* clicked outside window? */
3699
3700   gtk_tree_model_get_iter (priv->model, &iter, path);
3701   gtk_tree_path_free (path);
3702
3703   gtk_combo_box_popdown (combo_box);
3704
3705   if (tree_column_row_is_sensitive (combo_box, &iter))
3706     gtk_combo_box_set_active_iter (combo_box, &iter);
3707
3708   return TRUE;
3709 }
3710
3711 static gboolean
3712 gtk_combo_box_menu_key_press (GtkWidget   *widget,
3713                               GdkEventKey *event,
3714                               gpointer     data)
3715 {
3716   GtkComboBox *combo_box = GTK_COMBO_BOX (data);
3717
3718   if (!gtk_bindings_activate_event (G_OBJECT (widget), event))
3719     {
3720       /* The menu hasn't managed the
3721        * event, forward it to the combobox
3722        */
3723       gtk_bindings_activate_event (G_OBJECT (combo_box), event);
3724     }
3725
3726   return TRUE;
3727 }
3728
3729 static gboolean
3730 gtk_combo_box_list_key_press (GtkWidget   *widget,
3731                               GdkEventKey *event,
3732                               gpointer     data)
3733 {
3734   GtkComboBox *combo_box = GTK_COMBO_BOX (data);
3735   GtkTreeIter iter;
3736
3737   if (event->keyval == GDK_KEY_Return || event->keyval == GDK_KEY_ISO_Enter || event->keyval == GDK_KEY_KP_Enter ||
3738       event->keyval == GDK_KEY_space || event->keyval == GDK_KEY_KP_Space)
3739   {
3740     GtkTreeModel *model = NULL;
3741
3742     gtk_combo_box_popdown (combo_box);
3743
3744     if (combo_box->priv->model)
3745       {
3746         GtkTreeSelection *sel;
3747
3748         sel = gtk_tree_view_get_selection (GTK_TREE_VIEW (combo_box->priv->tree_view));
3749
3750         if (gtk_tree_selection_get_selected (sel, &model, &iter))
3751           gtk_combo_box_set_active_iter (combo_box, &iter);
3752       }
3753
3754     return TRUE;
3755   }
3756
3757   if (!gtk_bindings_activate_event (G_OBJECT (widget), event))
3758     {
3759       /* The list hasn't managed the
3760        * event, forward it to the combobox
3761        */
3762       gtk_bindings_activate_event (G_OBJECT (combo_box), event);
3763     }
3764
3765   return TRUE;
3766 }
3767
3768 static void
3769 gtk_combo_box_list_auto_scroll (GtkComboBox *combo_box,
3770                                 gint         x,
3771                                 gint         y)
3772 {
3773   GtkAdjustment *adj;
3774   GtkAllocation allocation;
3775   GtkWidget *tree_view = combo_box->priv->tree_view;
3776   gdouble value;
3777
3778   gtk_widget_get_allocation (tree_view, &allocation);
3779
3780   adj = gtk_scrolled_window_get_hadjustment (GTK_SCROLLED_WINDOW (combo_box->priv->scrolled_window));
3781   if (adj && gtk_adjustment_get_upper (adj) - gtk_adjustment_get_lower (adj) > gtk_adjustment_get_page_size (adj))
3782     {
3783       if (x <= allocation.x &&
3784           gtk_adjustment_get_lower (adj) < gtk_adjustment_get_value (adj))
3785         {
3786           value = gtk_adjustment_get_value (adj) - (allocation.x - x + 1);
3787           gtk_adjustment_set_value (adj, value);
3788         }
3789       else if (x >= allocation.x + allocation.width &&
3790                gtk_adjustment_get_upper (adj) - gtk_adjustment_get_page_size (adj) > gtk_adjustment_get_value (adj))
3791         {
3792           value = gtk_adjustment_get_value (adj) + (x - allocation.x - allocation.width + 1);
3793           gtk_adjustment_set_value (adj, MAX (value, 0.0));
3794         }
3795     }
3796
3797   adj = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (combo_box->priv->scrolled_window));
3798   if (adj && gtk_adjustment_get_upper (adj) - gtk_adjustment_get_lower (adj) > gtk_adjustment_get_page_size (adj))
3799     {
3800       if (y <= allocation.y &&
3801           gtk_adjustment_get_lower (adj) < gtk_adjustment_get_value (adj))
3802         {
3803           value = gtk_adjustment_get_value (adj) - (allocation.y - y + 1);
3804           gtk_adjustment_set_value (adj, value);
3805         }
3806       else if (y >= allocation.height &&
3807                gtk_adjustment_get_upper (adj) - gtk_adjustment_get_page_size (adj) > gtk_adjustment_get_value (adj))
3808         {
3809           value = gtk_adjustment_get_value (adj) + (y - allocation.height + 1);
3810           gtk_adjustment_set_value (adj, MAX (value, 0.0));
3811         }
3812     }
3813 }
3814
3815 static gboolean
3816 gtk_combo_box_list_scroll_timeout (GtkComboBox *combo_box)
3817 {
3818   GtkComboBoxPrivate *priv = combo_box->priv;
3819   gint x, y;
3820
3821   if (priv->auto_scroll)
3822     {
3823       gdk_window_get_device_position (gtk_widget_get_window (priv->tree_view),
3824                                       priv->grab_pointer,
3825                                       &x, &y, NULL);
3826       gtk_combo_box_list_auto_scroll (combo_box, x, y);
3827     }
3828
3829   return TRUE;
3830 }
3831
3832 static gboolean
3833 gtk_combo_box_list_enter_notify (GtkWidget        *widget,
3834                                  GdkEventCrossing *event,
3835                                  gpointer          data)
3836 {
3837   GtkComboBox *combo_box = GTK_COMBO_BOX (data);
3838
3839   combo_box->priv->auto_scroll = TRUE;
3840
3841   return TRUE;
3842 }
3843
3844 static gboolean
3845 gtk_combo_box_list_select_func (GtkTreeSelection *selection,
3846                                 GtkTreeModel     *model,
3847                                 GtkTreePath      *path,
3848                                 gboolean          path_currently_selected,
3849                                 gpointer          data)
3850 {
3851   GList *list, *columns;
3852   gboolean sensitive = FALSE;
3853
3854   columns = gtk_tree_view_get_columns (gtk_tree_selection_get_tree_view (selection));
3855
3856   for (list = columns; list && !sensitive; list = list->next)
3857     {
3858       GList *cells, *cell;
3859       gboolean cell_sensitive, cell_visible;
3860       GtkTreeIter iter;
3861       GtkTreeViewColumn *column = GTK_TREE_VIEW_COLUMN (list->data);
3862
3863       if (!gtk_tree_view_column_get_visible (column))
3864         continue;
3865
3866       gtk_tree_model_get_iter (model, &iter, path);
3867       gtk_tree_view_column_cell_set_cell_data (column, model, &iter,
3868                                                FALSE, FALSE);
3869
3870       cell = cells = gtk_cell_layout_get_cells (GTK_CELL_LAYOUT (column));
3871       while (cell)
3872         {
3873           g_object_get (cell->data,
3874                         "sensitive", &cell_sensitive,
3875                         "visible", &cell_visible,
3876                         NULL);
3877
3878           if (cell_visible && cell_sensitive)
3879             {
3880               sensitive = TRUE;
3881               break;
3882             }
3883
3884           cell = cell->next;
3885         }
3886
3887       g_list_free (cells);
3888     }
3889
3890   g_list_free (columns);
3891
3892   return sensitive;
3893 }
3894
3895 static void
3896 gtk_combo_box_list_row_changed (GtkTreeModel *model,
3897                                 GtkTreePath  *path,
3898                                 GtkTreeIter  *iter,
3899                                 gpointer      data)
3900 {
3901   /* XXX Do nothing ? */
3902 }
3903
3904 /*
3905  * GtkCellLayout implementation
3906  */
3907 static GtkCellArea *
3908 gtk_combo_box_cell_layout_get_area (GtkCellLayout *cell_layout)
3909 {
3910   GtkComboBox *combo = GTK_COMBO_BOX (cell_layout);
3911   GtkComboBoxPrivate *priv = combo->priv;
3912
3913   if (G_UNLIKELY (!priv->area))
3914     {
3915       priv->area = gtk_cell_area_box_new ();
3916       g_object_ref_sink (priv->area);
3917     }
3918
3919   return priv->area;
3920 }
3921
3922 /*
3923  * public API
3924  */
3925
3926 /**
3927  * gtk_combo_box_new:
3928  *
3929  * Creates a new empty #GtkComboBox.
3930  *
3931  * Return value: A new #GtkComboBox.
3932  *
3933  * Since: 2.4
3934  */
3935 GtkWidget *
3936 gtk_combo_box_new (void)
3937 {
3938   return g_object_new (GTK_TYPE_COMBO_BOX, NULL);
3939 }
3940
3941 /**
3942  * gtk_combo_box_new_with_area:
3943  * @area: the #GtkCellArea to use to layout cell renderers
3944  *
3945  * Creates a new empty #GtkComboBox using @area to layout cells.
3946  *
3947  * Return value: A new #GtkComboBox.
3948  */
3949 GtkWidget *
3950 gtk_combo_box_new_with_area (GtkCellArea  *area)
3951 {
3952   return g_object_new (GTK_TYPE_COMBO_BOX, "cell-area", area, NULL);
3953 }
3954
3955 /**
3956  * gtk_combo_box_new_with_area_and_entry:
3957  * @area: the #GtkCellArea to use to layout cell renderers
3958  *
3959  * Creates a new empty #GtkComboBox with an entry.
3960  *
3961  * The new combo box will use @area to layout cells.
3962  *
3963  * Return value: A new #GtkComboBox.
3964  */
3965 GtkWidget *
3966 gtk_combo_box_new_with_area_and_entry (GtkCellArea *area)
3967 {
3968   return g_object_new (GTK_TYPE_COMBO_BOX,
3969                        "has-entry", TRUE,
3970                        "cell-area", area,
3971                        NULL);
3972 }
3973
3974
3975 /**
3976  * gtk_combo_box_new_with_entry:
3977  *
3978  * Creates a new empty #GtkComboBox with an entry.
3979  *
3980  * Return value: A new #GtkComboBox.
3981  */
3982 GtkWidget *
3983 gtk_combo_box_new_with_entry (void)
3984 {
3985   return g_object_new (GTK_TYPE_COMBO_BOX, "has-entry", TRUE, NULL);
3986 }
3987
3988 /**
3989  * gtk_combo_box_new_with_model:
3990  * @model: A #GtkTreeModel.
3991  *
3992  * Creates a new #GtkComboBox with the model initialized to @model.
3993  *
3994  * Return value: A new #GtkComboBox.
3995  *
3996  * Since: 2.4
3997  */
3998 GtkWidget *
3999 gtk_combo_box_new_with_model (GtkTreeModel *model)
4000 {
4001   GtkComboBox *combo_box;
4002
4003   g_return_val_if_fail (GTK_IS_TREE_MODEL (model), NULL);
4004
4005   combo_box = g_object_new (GTK_TYPE_COMBO_BOX, "model", model, NULL);
4006
4007   return GTK_WIDGET (combo_box);
4008 }
4009
4010 /**
4011  * gtk_combo_box_new_with_model_and_entry:
4012  * @model: A #GtkTreeModel
4013  *
4014  * Creates a new empty #GtkComboBox with an entry
4015  * and with the model initialized to @model.
4016  *
4017  * Return value: A new #GtkComboBox
4018  */
4019 GtkWidget *
4020 gtk_combo_box_new_with_model_and_entry (GtkTreeModel *model)
4021 {
4022   return g_object_new (GTK_TYPE_COMBO_BOX,
4023                        "has-entry", TRUE,
4024                        "model", model,
4025                        NULL);
4026 }
4027
4028 /**
4029  * gtk_combo_box_get_wrap_width:
4030  * @combo_box: A #GtkComboBox
4031  *
4032  * Returns the wrap width which is used to determine the number of columns
4033  * for the popup menu. If the wrap width is larger than 1, the combo box
4034  * is in table mode.
4035  *
4036  * Returns: the wrap width.
4037  *
4038  * Since: 2.6
4039  */
4040 gint
4041 gtk_combo_box_get_wrap_width (GtkComboBox *combo_box)
4042 {
4043   g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), -1);
4044
4045   return combo_box->priv->wrap_width;
4046 }
4047
4048 /**
4049  * gtk_combo_box_set_wrap_width:
4050  * @combo_box: A #GtkComboBox
4051  * @width: Preferred number of columns
4052  *
4053  * Sets the wrap width of @combo_box to be @width. The wrap width is basically
4054  * the preferred number of columns when you want the popup to be layed out
4055  * in a table.
4056  *
4057  * Since: 2.4
4058  */
4059 void
4060 gtk_combo_box_set_wrap_width (GtkComboBox *combo_box,
4061                               gint         width)
4062 {
4063   GtkComboBoxPrivate *priv;
4064
4065   g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
4066   g_return_if_fail (width >= 0);
4067
4068   priv = combo_box->priv;
4069
4070   if (width != priv->wrap_width)
4071     {
4072       priv->wrap_width = width;
4073
4074       gtk_combo_box_check_appearance (combo_box);
4075
4076       if (GTK_IS_TREE_MENU (priv->popup_widget))
4077         _gtk_tree_menu_set_wrap_width (GTK_TREE_MENU (priv->popup_widget), priv->wrap_width);
4078
4079       g_object_notify (G_OBJECT (combo_box), "wrap-width");
4080     }
4081 }
4082
4083 /**
4084  * gtk_combo_box_get_row_span_column:
4085  * @combo_box: A #GtkComboBox
4086  *
4087  * Returns the column with row span information for @combo_box.
4088  *
4089  * Returns: the row span column.
4090  *
4091  * Since: 2.6
4092  */
4093 gint
4094 gtk_combo_box_get_row_span_column (GtkComboBox *combo_box)
4095 {
4096   g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), -1);
4097
4098   return combo_box->priv->row_column;
4099 }
4100
4101 /**
4102  * gtk_combo_box_set_row_span_column:
4103  * @combo_box: A #GtkComboBox.
4104  * @row_span: A column in the model passed during construction.
4105  *
4106  * Sets the column with row span information for @combo_box to be @row_span.
4107  * The row span column contains integers which indicate how many rows
4108  * an item should span.
4109  *
4110  * Since: 2.4
4111  */
4112 void
4113 gtk_combo_box_set_row_span_column (GtkComboBox *combo_box,
4114                                    gint         row_span)
4115 {
4116   GtkComboBoxPrivate *priv;
4117   gint col;
4118
4119   g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
4120
4121   priv = combo_box->priv;
4122
4123   col = gtk_tree_model_get_n_columns (priv->model);
4124   g_return_if_fail (row_span >= -1 && row_span < col);
4125
4126   if (row_span != priv->row_column)
4127     {
4128       priv->row_column = row_span;
4129
4130       if (GTK_IS_TREE_MENU (priv->popup_widget))
4131         _gtk_tree_menu_set_row_span_column (GTK_TREE_MENU (priv->popup_widget), priv->row_column);
4132
4133       g_object_notify (G_OBJECT (combo_box), "row-span-column");
4134     }
4135 }
4136
4137 /**
4138  * gtk_combo_box_get_column_span_column:
4139  * @combo_box: A #GtkComboBox
4140  *
4141  * Returns the column with column span information for @combo_box.
4142  *
4143  * Returns: the column span column.
4144  *
4145  * Since: 2.6
4146  */
4147 gint
4148 gtk_combo_box_get_column_span_column (GtkComboBox *combo_box)
4149 {
4150   g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), -1);
4151
4152   return combo_box->priv->col_column;
4153 }
4154
4155 /**
4156  * gtk_combo_box_set_column_span_column:
4157  * @combo_box: A #GtkComboBox
4158  * @column_span: A column in the model passed during construction
4159  *
4160  * Sets the column with column span information for @combo_box to be
4161  * @column_span. The column span column contains integers which indicate
4162  * how many columns an item should span.
4163  *
4164  * Since: 2.4
4165  */
4166 void
4167 gtk_combo_box_set_column_span_column (GtkComboBox *combo_box,
4168                                       gint         column_span)
4169 {
4170   GtkComboBoxPrivate *priv;
4171   gint col;
4172
4173   g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
4174
4175   priv = combo_box->priv;
4176
4177   col = gtk_tree_model_get_n_columns (priv->model);
4178   g_return_if_fail (column_span >= -1 && column_span < col);
4179
4180   if (column_span != priv->col_column)
4181     {
4182       priv->col_column = column_span;
4183
4184       if (GTK_IS_TREE_MENU (priv->popup_widget))
4185         _gtk_tree_menu_set_column_span_column (GTK_TREE_MENU (priv->popup_widget), priv->col_column);
4186
4187       g_object_notify (G_OBJECT (combo_box), "column-span-column");
4188     }
4189 }
4190
4191 /**
4192  * gtk_combo_box_get_active:
4193  * @combo_box: A #GtkComboBox
4194  *
4195  * Returns the index of the currently active item, or -1 if there's no
4196  * active item. If the model is a non-flat treemodel, and the active item
4197  * is not an immediate child of the root of the tree, this function returns
4198  * <literal>gtk_tree_path_get_indices (path)[0]</literal>, where
4199  * <literal>path</literal> is the #GtkTreePath of the active item.
4200  *
4201  * Return value: An integer which is the index of the currently active item,
4202  *     or -1 if there's no active item.
4203  *
4204  * Since: 2.4
4205  */
4206 gint
4207 gtk_combo_box_get_active (GtkComboBox *combo_box)
4208 {
4209   GtkComboBoxPrivate *priv;
4210   gint result;
4211
4212   g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), 0);
4213
4214   priv = combo_box->priv;
4215
4216   if (gtk_tree_row_reference_valid (priv->active_row))
4217     {
4218       GtkTreePath *path;
4219
4220       path = gtk_tree_row_reference_get_path (priv->active_row);
4221       result = gtk_tree_path_get_indices (path)[0];
4222       gtk_tree_path_free (path);
4223     }
4224   else
4225     result = -1;
4226
4227   return result;
4228 }
4229
4230 /**
4231  * gtk_combo_box_set_active:
4232  * @combo_box: A #GtkComboBox
4233  * @index_: An index in the model passed during construction, or -1 to have
4234  * no active item
4235  *
4236  * Sets the active item of @combo_box to be the item at @index.
4237  *
4238  * Since: 2.4
4239  */
4240 void
4241 gtk_combo_box_set_active (GtkComboBox *combo_box,
4242                           gint         index_)
4243 {
4244   GtkTreePath *path = NULL;
4245   g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
4246   g_return_if_fail (index_ >= -1);
4247
4248   if (combo_box->priv->model == NULL)
4249     {
4250       /* Save index, in case the model is set after the index */
4251       combo_box->priv->active = index_;
4252       if (index_ != -1)
4253         return;
4254     }
4255
4256   if (index_ != -1)
4257     path = gtk_tree_path_new_from_indices (index_, -1);
4258
4259   gtk_combo_box_set_active_internal (combo_box, path);
4260
4261   if (path)
4262     gtk_tree_path_free (path);
4263 }
4264
4265 static void
4266 gtk_combo_box_set_active_internal (GtkComboBox *combo_box,
4267                                    GtkTreePath *path)
4268 {
4269   GtkComboBoxPrivate *priv = combo_box->priv;
4270   GtkTreePath *active_path;
4271   gint path_cmp;
4272
4273   /* Remember whether the initially active row is valid. */
4274   gboolean is_valid_row_reference = gtk_tree_row_reference_valid (priv->active_row);
4275
4276   if (path && is_valid_row_reference)
4277     {
4278       active_path = gtk_tree_row_reference_get_path (priv->active_row);
4279       path_cmp = gtk_tree_path_compare (path, active_path);
4280       gtk_tree_path_free (active_path);
4281       if (path_cmp == 0)
4282         return;
4283     }
4284
4285   if (priv->active_row)
4286     {
4287       gtk_tree_row_reference_free (priv->active_row);
4288       priv->active_row = NULL;
4289     }
4290
4291   if (!path)
4292     {
4293       if (priv->tree_view)
4294         gtk_tree_selection_unselect_all (gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view)));
4295       else
4296         {
4297           GtkMenu *menu = GTK_MENU (priv->popup_widget);
4298
4299           if (GTK_IS_MENU (menu))
4300             gtk_menu_set_active (menu, -1);
4301         }
4302
4303       if (priv->cell_view)
4304         gtk_cell_view_set_displayed_row (GTK_CELL_VIEW (priv->cell_view), NULL);
4305
4306       /*
4307        *  Do not emit a "changed" signal when an already invalid selection was
4308        *  now set to invalid.
4309        */
4310       if (!is_valid_row_reference)
4311         return;
4312     }
4313   else
4314     {
4315       priv->active_row =
4316         gtk_tree_row_reference_new (priv->model, path);
4317
4318       if (priv->tree_view)
4319         {
4320           gtk_tree_view_set_cursor (GTK_TREE_VIEW (priv->tree_view),
4321                                     path, NULL, FALSE);
4322         }
4323       else if (GTK_IS_MENU (priv->popup_widget))
4324         {
4325           /* FIXME handle nested menus better */
4326           gtk_menu_set_active (GTK_MENU (priv->popup_widget),
4327                                gtk_tree_path_get_indices (path)[0]);
4328         }
4329
4330       if (priv->cell_view)
4331         gtk_cell_view_set_displayed_row (GTK_CELL_VIEW (priv->cell_view),
4332                                          path);
4333     }
4334
4335   g_signal_emit (combo_box, combo_box_signals[CHANGED], 0);
4336   g_object_notify (G_OBJECT (combo_box), "active");
4337   if (combo_box->priv->id_column >= 0)
4338     g_object_notify (G_OBJECT (combo_box), "active-id");
4339 }
4340
4341
4342 /**
4343  * gtk_combo_box_get_active_iter:
4344  * @combo_box: A #GtkComboBox
4345  * @iter: (out): The uninitialized #GtkTreeIter
4346  *
4347  * Sets @iter to point to the current active item, if it exists.
4348  *
4349  * Return value: %TRUE, if @iter was set
4350  *
4351  * Since: 2.4
4352  */
4353 gboolean
4354 gtk_combo_box_get_active_iter (GtkComboBox     *combo_box,
4355                                GtkTreeIter     *iter)
4356 {
4357   GtkTreePath *path;
4358   gboolean result;
4359
4360   g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), FALSE);
4361
4362   if (!gtk_tree_row_reference_valid (combo_box->priv->active_row))
4363     return FALSE;
4364
4365   path = gtk_tree_row_reference_get_path (combo_box->priv->active_row);
4366   result = gtk_tree_model_get_iter (combo_box->priv->model, iter, path);
4367   gtk_tree_path_free (path);
4368
4369   return result;
4370 }
4371
4372 /**
4373  * gtk_combo_box_set_active_iter:
4374  * @combo_box: A #GtkComboBox
4375  * @iter: (allow-none): The #GtkTreeIter, or %NULL
4376  *
4377  * Sets the current active item to be the one referenced by @iter, or
4378  * unsets the active item if @iter is %NULL.
4379  *
4380  * Since: 2.4
4381  */
4382 void
4383 gtk_combo_box_set_active_iter (GtkComboBox     *combo_box,
4384                                GtkTreeIter     *iter)
4385 {
4386   GtkTreePath *path = NULL;
4387
4388   g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
4389
4390   if (iter)
4391     path = gtk_tree_model_get_path (gtk_combo_box_get_model (combo_box), iter);
4392
4393   gtk_combo_box_set_active_internal (combo_box, path);
4394   gtk_tree_path_free (path);
4395 }
4396
4397 /**
4398  * gtk_combo_box_set_model:
4399  * @combo_box: A #GtkComboBox
4400  * @model: (allow-none): A #GtkTreeModel
4401  *
4402  * Sets the model used by @combo_box to be @model. Will unset a previously set
4403  * model (if applicable). If model is %NULL, then it will unset the model.
4404  *
4405  * Note that this function does not clear the cell renderers, you have to
4406  * call gtk_cell_layout_clear() yourself if you need to set up different
4407  * cell renderers for the new model.
4408  *
4409  * Since: 2.4
4410  */
4411 void
4412 gtk_combo_box_set_model (GtkComboBox  *combo_box,
4413                          GtkTreeModel *model)
4414 {
4415   g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
4416   g_return_if_fail (model == NULL || GTK_IS_TREE_MODEL (model));
4417
4418   if (model == combo_box->priv->model)
4419     return;
4420
4421   gtk_combo_box_unset_model (combo_box);
4422
4423   if (model == NULL)
4424     goto out;
4425
4426   combo_box->priv->model = model;
4427   g_object_ref (combo_box->priv->model);
4428
4429   combo_box->priv->inserted_id =
4430     g_signal_connect (combo_box->priv->model, "row-inserted",
4431                       G_CALLBACK (gtk_combo_box_model_row_inserted),
4432                       combo_box);
4433   combo_box->priv->deleted_id =
4434     g_signal_connect (combo_box->priv->model, "row-deleted",
4435                       G_CALLBACK (gtk_combo_box_model_row_deleted),
4436                       combo_box);
4437   combo_box->priv->reordered_id =
4438     g_signal_connect (combo_box->priv->model, "rows-reordered",
4439                       G_CALLBACK (gtk_combo_box_model_rows_reordered),
4440                       combo_box);
4441   combo_box->priv->changed_id =
4442     g_signal_connect (combo_box->priv->model, "row-changed",
4443                       G_CALLBACK (gtk_combo_box_model_row_changed),
4444                       combo_box);
4445
4446   if (combo_box->priv->tree_view)
4447     {
4448       /* list mode */
4449       gtk_tree_view_set_model (GTK_TREE_VIEW (combo_box->priv->tree_view),
4450                                combo_box->priv->model);
4451       gtk_combo_box_list_popup_resize (combo_box);
4452     }
4453
4454   if (GTK_IS_TREE_MENU (combo_box->priv->popup_widget))
4455     {
4456       /* menu mode */
4457       _gtk_tree_menu_set_model (GTK_TREE_MENU (combo_box->priv->popup_widget),
4458                                 combo_box->priv->model);
4459     }
4460
4461   if (combo_box->priv->cell_view)
4462     gtk_cell_view_set_model (GTK_CELL_VIEW (combo_box->priv->cell_view),
4463                              combo_box->priv->model);
4464
4465   if (combo_box->priv->active != -1)
4466     {
4467       /* If an index was set in advance, apply it now */
4468       gtk_combo_box_set_active (combo_box, combo_box->priv->active);
4469       combo_box->priv->active = -1;
4470     }
4471
4472 out:
4473   gtk_combo_box_update_sensitivity (combo_box);
4474
4475   g_object_notify (G_OBJECT (combo_box), "model");
4476 }
4477
4478 /**
4479  * gtk_combo_box_get_model:
4480  * @combo_box: A #GtkComboBox
4481  *
4482  * Returns the #GtkTreeModel which is acting as data source for @combo_box.
4483  *
4484  * Return value: (transfer none): A #GtkTreeModel which was passed
4485  *     during construction.
4486  *
4487  * Since: 2.4
4488  */
4489 GtkTreeModel *
4490 gtk_combo_box_get_model (GtkComboBox *combo_box)
4491 {
4492   g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), NULL);
4493
4494   return combo_box->priv->model;
4495 }
4496
4497 static void
4498 gtk_combo_box_real_move_active (GtkComboBox   *combo_box,
4499                                 GtkScrollType  scroll)
4500 {
4501   GtkTreeIter iter;
4502   GtkTreeIter new_iter;
4503   gboolean    active_iter;
4504   gboolean    found;
4505
4506   if (!combo_box->priv->model)
4507     {
4508       gtk_widget_error_bell (GTK_WIDGET (combo_box));
4509       return;
4510     }
4511
4512   active_iter = gtk_combo_box_get_active_iter (combo_box, &iter);
4513
4514   switch (scroll)
4515     {
4516     case GTK_SCROLL_STEP_BACKWARD:
4517     case GTK_SCROLL_STEP_UP:
4518     case GTK_SCROLL_STEP_LEFT:
4519       if (active_iter)
4520         {
4521           found = tree_prev (combo_box, combo_box->priv->model,
4522                              &iter, &new_iter, FALSE);
4523           break;
4524         }
4525       /* else fall through */
4526
4527     case GTK_SCROLL_PAGE_FORWARD:
4528     case GTK_SCROLL_PAGE_DOWN:
4529     case GTK_SCROLL_PAGE_RIGHT:
4530     case GTK_SCROLL_END:
4531       found = tree_last (combo_box, combo_box->priv->model, &new_iter, FALSE);
4532       break;
4533
4534     case GTK_SCROLL_STEP_FORWARD:
4535     case GTK_SCROLL_STEP_DOWN:
4536     case GTK_SCROLL_STEP_RIGHT:
4537       if (active_iter)
4538         {
4539           found = tree_next (combo_box, combo_box->priv->model,
4540                              &iter, &new_iter, FALSE);
4541           break;
4542         }
4543       /* else fall through */
4544
4545     case GTK_SCROLL_PAGE_BACKWARD:
4546     case GTK_SCROLL_PAGE_UP:
4547     case GTK_SCROLL_PAGE_LEFT:
4548     case GTK_SCROLL_START:
4549       found = tree_first (combo_box, combo_box->priv->model, &new_iter, FALSE);
4550       break;
4551
4552     default:
4553       return;
4554     }
4555
4556   if (found && active_iter)
4557     {
4558       GtkTreePath *old_path;
4559       GtkTreePath *new_path;
4560
4561       old_path = gtk_tree_model_get_path (combo_box->priv->model, &iter);
4562       new_path = gtk_tree_model_get_path (combo_box->priv->model, &new_iter);
4563
4564       if (gtk_tree_path_compare (old_path, new_path) == 0)
4565         found = FALSE;
4566
4567       gtk_tree_path_free (old_path);
4568       gtk_tree_path_free (new_path);
4569     }
4570
4571   if (found)
4572     {
4573       gtk_combo_box_set_active_iter (combo_box, &new_iter);
4574     }
4575   else
4576     {
4577       gtk_widget_error_bell (GTK_WIDGET (combo_box));
4578     }
4579 }
4580
4581 static gboolean
4582 gtk_combo_box_mnemonic_activate (GtkWidget *widget,
4583                                  gboolean   group_cycling)
4584 {
4585   GtkComboBox *combo_box = GTK_COMBO_BOX (widget);
4586
4587   if (combo_box->priv->has_entry)
4588     {
4589       GtkWidget* child;
4590
4591       child = gtk_bin_get_child (GTK_BIN (combo_box));
4592       if (child)
4593         gtk_widget_grab_focus (child);
4594     }
4595   else
4596     gtk_widget_grab_focus (combo_box->priv->button);
4597
4598   return TRUE;
4599 }
4600
4601 static void
4602 gtk_combo_box_grab_focus (GtkWidget *widget)
4603 {
4604   GtkComboBox *combo_box = GTK_COMBO_BOX (widget);
4605
4606   if (combo_box->priv->has_entry)
4607     {
4608       GtkWidget *child;
4609
4610       child = gtk_bin_get_child (GTK_BIN (combo_box));
4611       if (child)
4612         gtk_widget_grab_focus (child);
4613     }
4614   else
4615     gtk_widget_grab_focus (combo_box->priv->button);
4616 }
4617
4618 static void
4619 gtk_combo_box_destroy (GtkWidget *widget)
4620 {
4621   GtkComboBox *combo_box = GTK_COMBO_BOX (widget);
4622
4623   if (combo_box->priv->popup_idle_id > 0)
4624     {
4625       g_source_remove (combo_box->priv->popup_idle_id);
4626       combo_box->priv->popup_idle_id = 0;
4627     }
4628
4629   gtk_combo_box_popdown (combo_box);
4630
4631   if (combo_box->priv->row_separator_destroy)
4632     combo_box->priv->row_separator_destroy (combo_box->priv->row_separator_data);
4633
4634   combo_box->priv->row_separator_func = NULL;
4635   combo_box->priv->row_separator_data = NULL;
4636   combo_box->priv->row_separator_destroy = NULL;
4637
4638   GTK_WIDGET_CLASS (gtk_combo_box_parent_class)->destroy (widget);
4639   combo_box->priv->cell_view = NULL;
4640 }
4641
4642 static void
4643 gtk_combo_box_entry_contents_changed (GtkEntry *entry,
4644                                       gpointer  user_data)
4645 {
4646   GtkComboBox *combo_box = GTK_COMBO_BOX (user_data);
4647
4648   /*
4649    *  Fixes regression reported in bug #574059. The old functionality relied on
4650    *  bug #572478.  As a bugfix, we now emit the "changed" signal ourselves
4651    *  when the selection was already set to -1.
4652    */
4653   if (gtk_combo_box_get_active(combo_box) == -1)
4654     g_signal_emit_by_name (combo_box, "changed");
4655   else
4656     gtk_combo_box_set_active (combo_box, -1);
4657 }
4658
4659 static void
4660 gtk_combo_box_entry_active_changed (GtkComboBox *combo_box,
4661                                     gpointer     user_data)
4662 {
4663   GtkTreeModel *model;
4664   GtkTreeIter iter;
4665
4666   if (gtk_combo_box_get_active_iter (combo_box, &iter))
4667     {
4668       GtkEntry *entry = GTK_ENTRY (gtk_bin_get_child (GTK_BIN (combo_box)));
4669
4670       if (entry)
4671         {
4672           GtkTreePath *path;
4673           gchar       *path_str;
4674           gchar       *text = NULL;
4675
4676           model    = gtk_combo_box_get_model (combo_box);
4677           path     = gtk_tree_model_get_path (model, &iter);
4678           path_str = gtk_tree_path_to_string (path);
4679
4680           g_signal_handlers_block_by_func (entry,
4681                                            gtk_combo_box_entry_contents_changed,
4682                                            combo_box);
4683
4684
4685           g_signal_emit (combo_box, combo_box_signals[FORMAT_ENTRY_TEXT], 0,
4686                          path_str, &text);
4687
4688           gtk_entry_set_text (entry, text);
4689
4690           g_signal_handlers_unblock_by_func (entry,
4691                                              gtk_combo_box_entry_contents_changed,
4692                                              combo_box);
4693
4694           gtk_tree_path_free (path);
4695           g_free (text);
4696           g_free (path_str);
4697         }
4698     }
4699 }
4700
4701 static gchar *
4702 gtk_combo_box_format_entry_text (GtkComboBox     *combo_box,
4703                                  const gchar     *path)
4704 {
4705   GtkComboBoxPrivate *priv = combo_box->priv;
4706   GtkTreeModel       *model;
4707   GtkTreeIter         iter;
4708   gchar              *text = NULL;
4709
4710   if (priv->text_column >= 0)
4711     {
4712       model = gtk_combo_box_get_model (combo_box);
4713       gtk_tree_model_get_iter_from_string (model, &iter, path);
4714
4715       gtk_tree_model_get (model, &iter,
4716                           priv->text_column, &text,
4717                           -1);
4718     }
4719
4720   return text;
4721 }
4722
4723
4724 static GObject *
4725 gtk_combo_box_constructor (GType                  type,
4726                            guint                  n_construct_properties,
4727                            GObjectConstructParam *construct_properties)
4728 {
4729   GObject            *object;
4730   GtkComboBox        *combo_box;
4731   GtkComboBoxPrivate *priv;
4732
4733   object = G_OBJECT_CLASS (gtk_combo_box_parent_class)->constructor
4734     (type, n_construct_properties, construct_properties);
4735
4736   combo_box = GTK_COMBO_BOX (object);
4737   priv      = combo_box->priv;
4738
4739   if (!priv->area)
4740     {
4741       priv->area = gtk_cell_area_box_new ();
4742       g_object_ref_sink (priv->area);
4743     }
4744
4745   priv->cell_view = gtk_cell_view_new_with_context (priv->area, NULL);
4746   gtk_cell_view_set_fit_model (GTK_CELL_VIEW (priv->cell_view), TRUE);
4747   gtk_cell_view_set_model (GTK_CELL_VIEW (priv->cell_view), priv->model);
4748   gtk_widget_set_parent (priv->cell_view, GTK_WIDGET (combo_box));
4749   _gtk_bin_set_child (GTK_BIN (combo_box), priv->cell_view);
4750   gtk_widget_show (priv->cell_view);
4751
4752   gtk_combo_box_check_appearance (combo_box);
4753
4754   if (priv->has_entry)
4755     {
4756       GtkWidget *entry;
4757       GtkStyleContext *context;
4758
4759       entry = gtk_entry_new ();
4760       gtk_widget_show (entry);
4761       gtk_container_add (GTK_CONTAINER (combo_box), entry);
4762
4763       context = gtk_widget_get_style_context (GTK_WIDGET (combo_box));
4764       gtk_style_context_add_class (context, GTK_STYLE_CLASS_COMBOBOX_ENTRY);
4765
4766       priv->text_renderer = gtk_cell_renderer_text_new ();
4767       gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo_box),
4768                                   priv->text_renderer, TRUE);
4769
4770       gtk_combo_box_set_active (GTK_COMBO_BOX (combo_box), -1);
4771
4772       g_signal_connect (combo_box, "changed",
4773                         G_CALLBACK (gtk_combo_box_entry_active_changed), NULL);
4774     }
4775
4776   return object;
4777 }
4778
4779
4780 static void
4781 gtk_combo_box_dispose(GObject* object)
4782 {
4783   GtkComboBox *combo_box = GTK_COMBO_BOX (object);
4784
4785   if (GTK_IS_MENU (combo_box->priv->popup_widget))
4786     {
4787       gtk_combo_box_menu_destroy (combo_box);
4788       gtk_menu_detach (GTK_MENU (combo_box->priv->popup_widget));
4789       combo_box->priv->popup_widget = NULL;
4790     }
4791
4792   if (combo_box->priv->area)
4793     {
4794       g_object_unref (combo_box->priv->area);
4795       combo_box->priv->area = NULL;
4796     }
4797
4798   if (GTK_IS_TREE_VIEW (combo_box->priv->tree_view))
4799     gtk_combo_box_list_destroy (combo_box);
4800
4801   if (combo_box->priv->popup_window)
4802     {
4803       gtk_widget_destroy (combo_box->priv->popup_window);
4804       combo_box->priv->popup_window = NULL;
4805     }
4806
4807   gtk_combo_box_unset_model (combo_box);
4808
4809   G_OBJECT_CLASS (gtk_combo_box_parent_class)->dispose (object);
4810 }
4811
4812 static void
4813 gtk_combo_box_finalize (GObject *object)
4814 {
4815   GtkComboBox *combo_box = GTK_COMBO_BOX (object);
4816
4817   g_free (combo_box->priv->tearoff_title);
4818
4819   G_OBJECT_CLASS (gtk_combo_box_parent_class)->finalize (object);
4820 }
4821
4822 static gboolean
4823 gtk_cell_editable_key_press (GtkWidget   *widget,
4824                              GdkEventKey *event,
4825                              gpointer     data)
4826 {
4827   GtkComboBox *combo_box = GTK_COMBO_BOX (data);
4828
4829   if (event->keyval == GDK_KEY_Escape)
4830     {
4831       g_object_set (combo_box,
4832                     "editing-canceled", TRUE,
4833                     NULL);
4834       gtk_cell_editable_editing_done (GTK_CELL_EDITABLE (combo_box));
4835       gtk_cell_editable_remove_widget (GTK_CELL_EDITABLE (combo_box));
4836
4837       return TRUE;
4838     }
4839   else if (event->keyval == GDK_KEY_Return ||
4840            event->keyval == GDK_KEY_ISO_Enter ||
4841            event->keyval == GDK_KEY_KP_Enter)
4842     {
4843       gtk_cell_editable_editing_done (GTK_CELL_EDITABLE (combo_box));
4844       gtk_cell_editable_remove_widget (GTK_CELL_EDITABLE (combo_box));
4845
4846       return TRUE;
4847     }
4848
4849   return FALSE;
4850 }
4851
4852 static gboolean
4853 popdown_idle (gpointer data)
4854 {
4855   GtkComboBox *combo_box;
4856
4857   combo_box = GTK_COMBO_BOX (data);
4858
4859   gtk_cell_editable_editing_done (GTK_CELL_EDITABLE (combo_box));
4860   gtk_cell_editable_remove_widget (GTK_CELL_EDITABLE (combo_box));
4861
4862   g_object_unref (combo_box);
4863
4864   return FALSE;
4865 }
4866
4867 static void
4868 popdown_handler (GtkWidget *widget,
4869                  gpointer   data)
4870 {
4871   gdk_threads_add_idle (popdown_idle, g_object_ref (data));
4872 }
4873
4874 static gboolean
4875 popup_idle (gpointer data)
4876 {
4877   GtkComboBox *combo_box;
4878
4879   combo_box = GTK_COMBO_BOX (data);
4880
4881   if (GTK_IS_MENU (combo_box->priv->popup_widget) &&
4882       combo_box->priv->cell_view)
4883     g_signal_connect_object (combo_box->priv->popup_widget,
4884                              "unmap", G_CALLBACK (popdown_handler),
4885                              combo_box, 0);
4886
4887   /* we unset this if a menu item is activated */
4888   g_object_set (combo_box,
4889                 "editing-canceled", TRUE,
4890                 NULL);
4891   gtk_combo_box_popup (combo_box);
4892
4893   combo_box->priv->popup_idle_id = 0;
4894   combo_box->priv->activate_button = 0;
4895   combo_box->priv->activate_time = 0;
4896
4897   return FALSE;
4898 }
4899
4900 static void
4901 gtk_combo_box_start_editing (GtkCellEditable *cell_editable,
4902                              GdkEvent        *event)
4903 {
4904   GtkComboBox *combo_box = GTK_COMBO_BOX (cell_editable);
4905   GtkWidget *child;
4906
4907   combo_box->priv->is_cell_renderer = TRUE;
4908
4909   if (combo_box->priv->cell_view)
4910     {
4911       g_signal_connect_object (combo_box->priv->button, "key-press-event",
4912                                G_CALLBACK (gtk_cell_editable_key_press),
4913                                cell_editable, 0);
4914
4915       gtk_widget_grab_focus (combo_box->priv->button);
4916     }
4917   else
4918     {
4919       child = gtk_bin_get_child (GTK_BIN (combo_box));
4920
4921       g_signal_connect_object (child, "key-press-event",
4922                                G_CALLBACK (gtk_cell_editable_key_press),
4923                                cell_editable, 0);
4924
4925       gtk_widget_grab_focus (child);
4926       gtk_widget_set_can_focus (combo_box->priv->button, FALSE);
4927     }
4928
4929   /* we do the immediate popup only for the optionmenu-like
4930    * appearance
4931    */
4932   if (combo_box->priv->is_cell_renderer &&
4933       combo_box->priv->cell_view && !combo_box->priv->tree_view)
4934     {
4935       if (event && event->type == GDK_BUTTON_PRESS)
4936         {
4937           GdkEventButton *event_button = (GdkEventButton *)event;
4938
4939           combo_box->priv->activate_button = event_button->button;
4940           combo_box->priv->activate_time = event_button->time;
4941         }
4942
4943       combo_box->priv->popup_idle_id =
4944           gdk_threads_add_idle (popup_idle, combo_box);
4945     }
4946 }
4947
4948
4949 /**
4950  * gtk_combo_box_get_add_tearoffs:
4951  * @combo_box: a #GtkComboBox
4952  *
4953  * Gets the current value of the :add-tearoffs property.
4954  *
4955  * Return value: the current value of the :add-tearoffs property.
4956  */
4957 gboolean
4958 gtk_combo_box_get_add_tearoffs (GtkComboBox *combo_box)
4959 {
4960   g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), FALSE);
4961
4962   return combo_box->priv->add_tearoffs;
4963 }
4964
4965 /**
4966  * gtk_combo_box_set_add_tearoffs:
4967  * @combo_box: a #GtkComboBox
4968  * @add_tearoffs: %TRUE to add tearoff menu items
4969  *
4970  * Sets whether the popup menu should have a tearoff
4971  * menu item.
4972  *
4973  * Since: 2.6
4974  */
4975 void
4976 gtk_combo_box_set_add_tearoffs (GtkComboBox *combo_box,
4977                                 gboolean     add_tearoffs)
4978 {
4979   g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
4980
4981   add_tearoffs = add_tearoffs != FALSE;
4982
4983   if (combo_box->priv->add_tearoffs != add_tearoffs)
4984     {
4985       combo_box->priv->add_tearoffs = add_tearoffs;
4986       gtk_combo_box_check_appearance (combo_box);
4987
4988       if (GTK_IS_TREE_MENU (combo_box->priv->popup_widget))
4989         _gtk_tree_menu_set_tearoff (GTK_TREE_MENU (combo_box->priv->popup_widget),
4990                                     combo_box->priv->add_tearoffs);
4991
4992       g_object_notify (G_OBJECT (combo_box), "add-tearoffs");
4993     }
4994 }
4995
4996 /**
4997  * gtk_combo_box_get_title:
4998  * @combo_box: a #GtkComboBox
4999  *
5000  * Gets the current title of the menu in tearoff mode. See
5001  * gtk_combo_box_set_add_tearoffs().
5002  *
5003  * Returns: the menu's title in tearoff mode. This is an internal copy of the
5004  * string which must not be freed.
5005  *
5006  * Since: 2.10
5007  */
5008 const gchar*
5009 gtk_combo_box_get_title (GtkComboBox *combo_box)
5010 {
5011   g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), NULL);
5012
5013   return combo_box->priv->tearoff_title;
5014 }
5015
5016 static void
5017 gtk_combo_box_update_title (GtkComboBox *combo_box)
5018 {
5019   gtk_combo_box_check_appearance (combo_box);
5020
5021   if (combo_box->priv->popup_widget &&
5022       GTK_IS_MENU (combo_box->priv->popup_widget))
5023     gtk_menu_set_title (GTK_MENU (combo_box->priv->popup_widget),
5024                         combo_box->priv->tearoff_title);
5025 }
5026
5027 /**
5028  * gtk_combo_box_set_title:
5029  * @combo_box: a #GtkComboBox
5030  * @title: a title for the menu in tearoff mode
5031  *
5032  * Sets the menu's title in tearoff mode.
5033  *
5034  * Since: 2.10
5035  */
5036 void
5037 gtk_combo_box_set_title (GtkComboBox *combo_box,
5038                          const gchar *title)
5039 {
5040   GtkComboBoxPrivate *priv;
5041
5042   g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
5043
5044   priv = combo_box->priv;
5045
5046   if (strcmp (title ? title : "",
5047               priv->tearoff_title ? priv->tearoff_title : "") != 0)
5048     {
5049       g_free (priv->tearoff_title);
5050       priv->tearoff_title = g_strdup (title);
5051
5052       gtk_combo_box_update_title (combo_box);
5053
5054       g_object_notify (G_OBJECT (combo_box), "tearoff-title");
5055     }
5056 }
5057
5058
5059 /**
5060  * gtk_combo_box_set_popup_fixed_width:
5061  * @combo_box: a #GtkComboBox
5062  * @fixed: whether to use a fixed popup width
5063  *
5064  * Specifies whether the popup's width should be a fixed width
5065  * matching the allocated width of the combo box.
5066  *
5067  * Since: 3.0
5068  **/
5069 void
5070 gtk_combo_box_set_popup_fixed_width (GtkComboBox *combo_box,
5071                                      gboolean     fixed)
5072 {
5073   g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
5074
5075   if (combo_box->priv->popup_fixed_width != fixed)
5076     {
5077       combo_box->priv->popup_fixed_width = fixed;
5078
5079       g_object_notify (G_OBJECT (combo_box), "popup-fixed-width");
5080     }
5081 }
5082
5083 /**
5084  * gtk_combo_box_get_popup_fixed_width:
5085  * @combo_box: a #GtkComboBox
5086  *
5087  * Gets whether the popup uses a fixed width matching
5088  * the allocated width of the combo box.
5089  *
5090  * Returns: %TRUE if the popup uses a fixed width
5091  *
5092  * Since: 3.0
5093  **/
5094 gboolean
5095 gtk_combo_box_get_popup_fixed_width (GtkComboBox *combo_box)
5096 {
5097   g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), FALSE);
5098
5099   return combo_box->priv->popup_fixed_width;
5100 }
5101
5102
5103 /**
5104  * gtk_combo_box_get_popup_accessible:
5105  * @combo_box: a #GtkComboBox
5106  *
5107  * Gets the accessible object corresponding to the combo box's popup.
5108  *
5109  * This function is mostly intended for use by accessibility technologies;
5110  * applications should have little use for it.
5111  *
5112  * Returns: (transfer none): the accessible object corresponding
5113  *     to the combo box's popup.
5114  *
5115  * Since: 2.6
5116  */
5117 AtkObject*
5118 gtk_combo_box_get_popup_accessible (GtkComboBox *combo_box)
5119 {
5120   AtkObject *atk_obj;
5121
5122   g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), NULL);
5123
5124   if (combo_box->priv->popup_widget)
5125     {
5126       atk_obj = gtk_widget_get_accessible (combo_box->priv->popup_widget);
5127       return atk_obj;
5128     }
5129
5130   return NULL;
5131 }
5132
5133 /**
5134  * gtk_combo_box_get_row_separator_func: (skip)
5135  * @combo_box: a #GtkComboBox
5136  *
5137  * Returns the current row separator function.
5138  *
5139  * Return value: the current row separator function.
5140  *
5141  * Since: 2.6
5142  */
5143 GtkTreeViewRowSeparatorFunc
5144 gtk_combo_box_get_row_separator_func (GtkComboBox *combo_box)
5145 {
5146   g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), NULL);
5147
5148   return combo_box->priv->row_separator_func;
5149 }
5150
5151 /**
5152  * gtk_combo_box_set_row_separator_func:
5153  * @combo_box: a #GtkComboBox
5154  * @func: a #GtkTreeViewRowSeparatorFunc
5155  * @data: (allow-none): user data to pass to @func, or %NULL
5156  * @destroy: (allow-none): destroy notifier for @data, or %NULL
5157  *
5158  * Sets the row separator function, which is used to determine
5159  * whether a row should be drawn as a separator. If the row separator
5160  * function is %NULL, no separators are drawn. This is the default value.
5161  *
5162  * Since: 2.6
5163  */
5164 void
5165 gtk_combo_box_set_row_separator_func (GtkComboBox                 *combo_box,
5166                                       GtkTreeViewRowSeparatorFunc  func,
5167                                       gpointer                     data,
5168                                       GDestroyNotify               destroy)
5169 {
5170   g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
5171
5172   if (combo_box->priv->row_separator_destroy)
5173     combo_box->priv->row_separator_destroy (combo_box->priv->row_separator_data);
5174
5175   combo_box->priv->row_separator_func = func;
5176   combo_box->priv->row_separator_data = data;
5177   combo_box->priv->row_separator_destroy = destroy;
5178
5179   /* Provoke the underlying treeview/menu to rebuild themselves with the new separator func */
5180   if (combo_box->priv->tree_view)
5181     {
5182       gtk_tree_view_set_model (GTK_TREE_VIEW (combo_box->priv->tree_view), NULL);
5183       gtk_tree_view_set_model (GTK_TREE_VIEW (combo_box->priv->tree_view), combo_box->priv->model);
5184     }
5185
5186   if (GTK_IS_TREE_MENU (combo_box->priv->popup_widget))
5187     {
5188       _gtk_tree_menu_set_model (GTK_TREE_MENU (combo_box->priv->popup_widget), NULL);
5189       _gtk_tree_menu_set_model (GTK_TREE_MENU (combo_box->priv->popup_widget), combo_box->priv->model);
5190     }
5191
5192   gtk_widget_queue_draw (GTK_WIDGET (combo_box));
5193 }
5194
5195 /**
5196  * gtk_combo_box_set_button_sensitivity:
5197  * @combo_box: a #GtkComboBox
5198  * @sensitivity: specify the sensitivity of the dropdown button
5199  *
5200  * Sets whether the dropdown button of the combo box should be
5201  * always sensitive (%GTK_SENSITIVITY_ON), never sensitive (%GTK_SENSITIVITY_OFF)
5202  * or only if there is at least one item to display (%GTK_SENSITIVITY_AUTO).
5203  *
5204  * Since: 2.14
5205  **/
5206 void
5207 gtk_combo_box_set_button_sensitivity (GtkComboBox        *combo_box,
5208                                       GtkSensitivityType  sensitivity)
5209 {
5210   g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
5211
5212   if (combo_box->priv->button_sensitivity != sensitivity)
5213     {
5214       combo_box->priv->button_sensitivity = sensitivity;
5215       gtk_combo_box_update_sensitivity (combo_box);
5216
5217       g_object_notify (G_OBJECT (combo_box), "button-sensitivity");
5218     }
5219 }
5220
5221 /**
5222  * gtk_combo_box_get_button_sensitivity:
5223  * @combo_box: a #GtkComboBox
5224  *
5225  * Returns whether the combo box sets the dropdown button
5226  * sensitive or not when there are no items in the model.
5227  *
5228  * Return Value: %GTK_SENSITIVITY_ON if the dropdown button
5229  *    is sensitive when the model is empty, %GTK_SENSITIVITY_OFF
5230  *    if the button is always insensitive or
5231  *    %GTK_SENSITIVITY_AUTO if it is only sensitive as long as
5232  *    the model has one item to be selected.
5233  *
5234  * Since: 2.14
5235  **/
5236 GtkSensitivityType
5237 gtk_combo_box_get_button_sensitivity (GtkComboBox *combo_box)
5238 {
5239   g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), FALSE);
5240
5241   return combo_box->priv->button_sensitivity;
5242 }
5243
5244
5245 /**
5246  * gtk_combo_box_get_has_entry:
5247  * @combo_box: a #GtkComboBox
5248  *
5249  * Returns whether the combo box has an entry.
5250  *
5251  * Return Value: whether there is an entry in @combo_box.
5252  *
5253  * Since: 2.24
5254  **/
5255 gboolean
5256 gtk_combo_box_get_has_entry (GtkComboBox *combo_box)
5257 {
5258   g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), FALSE);
5259
5260   return combo_box->priv->has_entry;
5261 }
5262
5263 /**
5264  * gtk_combo_box_set_entry_text_column:
5265  * @combo_box: A #GtkComboBox
5266  * @text_column: A column in @model to get the strings from for
5267  *     the internal entry
5268  *
5269  * Sets the model column which @combo_box should use to get strings from
5270  * to be @text_column. The column @text_column in the model of @combo_box
5271  * must be of type %G_TYPE_STRING.
5272  *
5273  * This is only relevant if @combo_box has been created with
5274  * #GtkComboBox:has-entry as %TRUE.
5275  *
5276  * Since: 2.24
5277  */
5278 void
5279 gtk_combo_box_set_entry_text_column (GtkComboBox *combo_box,
5280                                      gint         text_column)
5281 {
5282   GtkComboBoxPrivate *priv = combo_box->priv;
5283   GtkTreeModel *model;
5284
5285   g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
5286
5287   model = gtk_combo_box_get_model (combo_box);
5288
5289   g_return_if_fail (text_column >= 0);
5290   g_return_if_fail (model == NULL || text_column < gtk_tree_model_get_n_columns (model));
5291
5292   priv->text_column = text_column;
5293
5294   if (priv->text_renderer != NULL)
5295     gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (combo_box),
5296                                     priv->text_renderer,
5297                                     "text", text_column,
5298                                     NULL);
5299 }
5300
5301 /**
5302  * gtk_combo_box_get_entry_text_column:
5303  * @combo_box: A #GtkComboBox.
5304  *
5305  * Returns the column which @combo_box is using to get the strings
5306  * from to display in the internal entry.
5307  *
5308  * Return value: A column in the data source model of @combo_box.
5309  *
5310  * Since: 2.24
5311  */
5312 gint
5313 gtk_combo_box_get_entry_text_column (GtkComboBox *combo_box)
5314 {
5315   g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), 0);
5316
5317   return combo_box->priv->text_column;
5318 }
5319
5320 /**
5321  * gtk_combo_box_set_focus_on_click:
5322  * @combo: a #GtkComboBox
5323  * @focus_on_click: whether the combo box grabs focus when clicked
5324  *    with the mouse
5325  *
5326  * Sets whether the combo box will grab focus when it is clicked with
5327  * the mouse. Making mouse clicks not grab focus is useful in places
5328  * like toolbars where you don't want the keyboard focus removed from
5329  * the main area of the application.
5330  *
5331  * Since: 2.6
5332  */
5333 void
5334 gtk_combo_box_set_focus_on_click (GtkComboBox *combo_box,
5335                                   gboolean     focus_on_click)
5336 {
5337   g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
5338
5339   focus_on_click = focus_on_click != FALSE;
5340
5341   if (combo_box->priv->focus_on_click != focus_on_click)
5342     {
5343       combo_box->priv->focus_on_click = focus_on_click;
5344
5345       if (combo_box->priv->button)
5346         gtk_button_set_focus_on_click (GTK_BUTTON (combo_box->priv->button),
5347                                        focus_on_click);
5348
5349       g_object_notify (G_OBJECT (combo_box), "focus-on-click");
5350     }
5351 }
5352
5353 /**
5354  * gtk_combo_box_get_focus_on_click:
5355  * @combo: a #GtkComboBox
5356  *
5357  * Returns whether the combo box grabs focus when it is clicked
5358  * with the mouse. See gtk_combo_box_set_focus_on_click().
5359  *
5360  * Return value: %TRUE if the combo box grabs focus when it is
5361  *     clicked with the mouse.
5362  *
5363  * Since: 2.6
5364  */
5365 gboolean
5366 gtk_combo_box_get_focus_on_click (GtkComboBox *combo_box)
5367 {
5368   g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), FALSE);
5369
5370   return combo_box->priv->focus_on_click;
5371 }
5372
5373
5374 static gboolean
5375 gtk_combo_box_buildable_custom_tag_start (GtkBuildable  *buildable,
5376                                           GtkBuilder    *builder,
5377                                           GObject       *child,
5378                                           const gchar   *tagname,
5379                                           GMarkupParser *parser,
5380                                           gpointer      *data)
5381 {
5382   if (parent_buildable_iface->custom_tag_start (buildable, builder, child,
5383                                                 tagname, parser, data))
5384     return TRUE;
5385
5386   return _gtk_cell_layout_buildable_custom_tag_start (buildable, builder, child,
5387                                                       tagname, parser, data);
5388 }
5389
5390 static void
5391 gtk_combo_box_buildable_custom_tag_end (GtkBuildable *buildable,
5392                                         GtkBuilder   *builder,
5393                                         GObject      *child,
5394                                         const gchar  *tagname,
5395                                         gpointer     *data)
5396 {
5397   if (!_gtk_cell_layout_buildable_custom_tag_end (buildable, builder, child, tagname, data))
5398     parent_buildable_iface->custom_tag_end (buildable, builder, child, tagname, data);
5399 }
5400
5401 static GObject *
5402 gtk_combo_box_buildable_get_internal_child (GtkBuildable *buildable,
5403                                             GtkBuilder   *builder,
5404                                             const gchar  *childname)
5405 {
5406   GtkComboBox *combo_box = GTK_COMBO_BOX (buildable);
5407
5408   if (combo_box->priv->has_entry && strcmp (childname, "entry") == 0)
5409     return G_OBJECT (gtk_bin_get_child (GTK_BIN (buildable)));
5410
5411   return parent_buildable_iface->get_internal_child (buildable, builder, childname);
5412 }
5413
5414 static void
5415 gtk_combo_box_get_preferred_width (GtkWidget *widget,
5416                                    gint      *minimum_size,
5417                                    gint      *natural_size)
5418 {
5419   GtkComboBox           *combo_box = GTK_COMBO_BOX (widget);
5420   GtkComboBoxPrivate    *priv = combo_box->priv;
5421   gint                   font_size, arrow_size;
5422   PangoContext          *context;
5423   PangoFontMetrics      *metrics;
5424   const PangoFontDescription *font_desc;
5425   GtkWidget             *child;
5426   gint                   minimum_width = 0, natural_width = 0;
5427   gint                   child_min, child_nat;
5428   GtkStyleContext       *style_context;
5429   GtkStateFlags          state;
5430   GtkBorder              padding;
5431   gfloat                 arrow_scaling;
5432
5433   child = gtk_bin_get_child (GTK_BIN (widget));
5434
5435   /* common */
5436   gtk_widget_get_preferred_width (child, &child_min, &child_nat);
5437
5438   gtk_widget_style_get (GTK_WIDGET (widget),
5439                         "arrow-size", &arrow_size,
5440                         "arrow-scaling", &arrow_scaling,
5441                         NULL);
5442
5443   style_context = gtk_widget_get_style_context (widget);
5444   state = gtk_widget_get_state_flags (widget);
5445
5446   get_widget_padding_and_border (widget, &padding);
5447   font_desc = gtk_style_context_get_font (style_context, state);
5448
5449   context = gtk_widget_get_pango_context (GTK_WIDGET (widget));
5450   metrics = pango_context_get_metrics (context, font_desc,
5451                                        pango_context_get_language (context));
5452   font_size = PANGO_PIXELS (pango_font_metrics_get_ascent (metrics) +
5453                             pango_font_metrics_get_descent (metrics));
5454   pango_font_metrics_unref (metrics);
5455
5456   arrow_size = MAX (arrow_size, font_size) * arrow_scaling;
5457
5458   gtk_widget_set_size_request (priv->arrow, arrow_size, arrow_size);
5459
5460   if (!priv->tree_view)
5461     {
5462       /* menu mode */
5463       if (priv->cell_view)
5464         {
5465           gint box_width;
5466           gint border_width, xpad;
5467           GtkBorder button_padding;
5468
5469           border_width = gtk_container_get_border_width (GTK_CONTAINER (combo_box));
5470           get_widget_padding_and_border (priv->button, &button_padding);
5471
5472           gtk_widget_get_preferred_width (priv->box, &box_width, NULL);
5473           xpad = 2 * border_width +
5474             button_padding.left + button_padding.right + padding.left + padding.right;
5475
5476           minimum_width  = child_min + box_width + xpad;
5477           natural_width  = child_nat + box_width + xpad;
5478         }
5479       else
5480         {
5481           gint but_width, but_nat_width;
5482
5483           gtk_widget_get_preferred_width (priv->button,
5484                                           &but_width, &but_nat_width);
5485
5486           minimum_width  = child_min + but_width;
5487           natural_width  = child_nat + but_nat_width;
5488         }
5489     }
5490   else
5491     {
5492       /* list mode */
5493       gint button_width, button_nat_width;
5494
5495       /* sample + frame */
5496       minimum_width = child_min;
5497       natural_width = child_nat;
5498
5499       if (priv->cell_view_frame)
5500         {
5501           if (priv->has_frame)
5502             {
5503               gint border_width, xpad;
5504               GtkBorder frame_padding;
5505
5506               border_width = gtk_container_get_border_width (GTK_CONTAINER (priv->cell_view_frame));
5507               get_widget_padding_and_border (priv->cell_view_frame, &frame_padding);
5508               xpad = (2 * border_width) + frame_padding.left + frame_padding.right;
5509
5510               minimum_width  += xpad;
5511               natural_width  += xpad;
5512             }
5513         }
5514
5515       /* the button */
5516       gtk_widget_get_preferred_width (priv->button,
5517                                       &button_width, &button_nat_width);
5518
5519       minimum_width += button_width;
5520       natural_width += button_nat_width;
5521     }
5522
5523   minimum_width += padding.left + padding.right;
5524   natural_width += padding.left + padding.right;
5525
5526   if (minimum_size)
5527     *minimum_size = minimum_width;
5528
5529   if (natural_size)
5530     *natural_size = natural_width;
5531 }
5532
5533 static void
5534 gtk_combo_box_get_preferred_height (GtkWidget *widget,
5535                                     gint      *minimum_size,
5536                                     gint      *natural_size)
5537 {
5538   gint min_width;
5539
5540   /* Combo box is height-for-width only
5541    * (so we always just reserve enough height for the minimum width) */
5542   GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, &min_width, NULL);
5543   GTK_WIDGET_GET_CLASS (widget)->get_preferred_height_for_width (widget, min_width, minimum_size, natural_size);
5544 }
5545
5546 static void
5547 gtk_combo_box_get_preferred_width_for_height (GtkWidget *widget,
5548                                               gint       avail_size,
5549                                               gint      *minimum_size,
5550                                               gint      *natural_size)
5551 {
5552   /* Combo box is height-for-width only
5553    * (so we assume we always reserved enough height for the minimum width) */
5554   GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, minimum_size, natural_size);
5555 }
5556
5557
5558 static void
5559 gtk_combo_box_get_preferred_height_for_width (GtkWidget *widget,
5560                                               gint       avail_size,
5561                                               gint      *minimum_size,
5562                                               gint      *natural_size)
5563 {
5564   GtkComboBox           *combo_box = GTK_COMBO_BOX (widget);
5565   GtkComboBoxPrivate    *priv = combo_box->priv;
5566   gint                   min_height = 0, nat_height = 0;
5567   gint                   size;
5568   GtkWidget             *child;
5569   GtkBorder              padding;
5570
5571   child = gtk_bin_get_child (GTK_BIN (widget));
5572
5573   get_widget_padding_and_border (widget, &padding);
5574   size = avail_size;
5575
5576   if (!priv->tree_view)
5577     {
5578       /* menu mode */
5579       if (priv->cell_view)
5580         {
5581           /* calculate x/y padding and separator/arrow size */
5582           gint box_width, box_height;
5583           gint border_width, xpad, ypad;
5584           GtkBorder button_padding;
5585
5586           border_width = gtk_container_get_border_width (GTK_CONTAINER (combo_box));
5587           get_widget_padding_and_border (priv->button, &button_padding);
5588
5589           gtk_widget_get_preferred_width (priv->box, &box_width, NULL);
5590           gtk_widget_get_preferred_height_for_width (priv->box,
5591                                                      box_width, &box_height, NULL);
5592
5593           xpad = 2 * border_width +
5594             button_padding.left + button_padding.right;
5595           ypad = 2 * border_width +
5596             button_padding.top + button_padding.bottom;
5597
5598           size -= box_width + xpad;
5599
5600           /* Get height-for-width of the child widget, usually a GtkCellArea calculating
5601            * and fitting the whole treemodel */
5602           gtk_widget_get_preferred_height_for_width (child, size, &min_height, &nat_height);
5603
5604           min_height = MAX (min_height, box_height);
5605           nat_height = MAX (nat_height, box_height);
5606
5607           min_height += ypad;
5608           nat_height += ypad;
5609         }
5610       else
5611         {
5612           /* there is a custom child widget inside (no priv->cell_view) */
5613           gint but_width, but_height;
5614
5615           gtk_widget_get_preferred_width (priv->button, &but_width, NULL);
5616           gtk_widget_get_preferred_height_for_width (priv->button,
5617                                                      but_width, &but_height, NULL);
5618
5619           size -= but_width;
5620
5621           /* Get height-for-width of the child widget, usually a GtkCellArea calculating
5622            * and fitting the whole treemodel */
5623           gtk_widget_get_preferred_height_for_width (child, size, &min_height, &nat_height);
5624
5625           min_height = MAX (min_height, but_height);
5626           nat_height = MAX (nat_height, but_height);
5627         }
5628     }
5629   else
5630     {
5631       /* list mode */
5632       gint but_width, but_height;
5633       gint xpad = 0, ypad = 0;
5634
5635       gtk_widget_get_preferred_width (priv->button, &but_width, NULL);
5636       gtk_widget_get_preferred_height_for_width (priv->button,
5637                                                  but_width, &but_height, NULL);
5638
5639       if (priv->cell_view_frame && priv->has_frame)
5640         {
5641           GtkBorder frame_padding;
5642           gint border_width;
5643
5644           border_width = gtk_container_get_border_width (GTK_CONTAINER (priv->cell_view_frame));
5645           get_widget_padding_and_border (GTK_WIDGET (priv->cell_view_frame), &frame_padding);
5646
5647           xpad = (2 * border_width) + padding.left + frame_padding.right;
5648           ypad = (2 * border_width) + padding.top + frame_padding.bottom;
5649         }
5650
5651       size -= but_width;
5652       size -= xpad;
5653
5654       /* Get height-for-width of the child widget, usually a GtkCellArea calculating
5655        * and fitting the whole treemodel */
5656       gtk_widget_get_preferred_height_for_width (child, size, &min_height, &nat_height);
5657
5658       min_height = MAX (min_height, but_height);
5659       nat_height = MAX (nat_height, but_height);
5660
5661       min_height += ypad;
5662       nat_height += ypad;
5663     }
5664
5665   min_height += padding.top + padding.bottom;
5666   nat_height += padding.top + padding.bottom;
5667
5668   if (minimum_size)
5669     *minimum_size = min_height;
5670
5671   if (natural_size)
5672     *natural_size = nat_height;
5673 }
5674
5675 /**
5676  * gtk_combo_box_set_id_column:
5677  * @combo_box: A #GtkComboBox
5678  * @id_column: A column in @model to get string IDs for values from
5679  *
5680  * Sets the model column which @combo_box should use to get string IDs
5681  * for values from. The column @id_column in the model of @combo_box
5682  * must be of type %G_TYPE_STRING.
5683  *
5684  * Since: 3.0
5685  */
5686 void
5687 gtk_combo_box_set_id_column (GtkComboBox *combo_box,
5688                              gint         id_column)
5689 {
5690   GtkComboBoxPrivate *priv = combo_box->priv;
5691   GtkTreeModel *model;
5692
5693   g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
5694
5695   if (id_column != priv->id_column)
5696     {
5697       model = gtk_combo_box_get_model (combo_box);
5698
5699       g_return_if_fail (id_column >= 0);
5700       g_return_if_fail (model == NULL ||
5701                         id_column < gtk_tree_model_get_n_columns (model));
5702
5703       priv->id_column = id_column;
5704
5705       g_object_notify (G_OBJECT (combo_box), "id-column");
5706       g_object_notify (G_OBJECT (combo_box), "active-id");
5707     }
5708 }
5709
5710 /**
5711  * gtk_combo_box_get_id_column:
5712  * @combo_box: A #GtkComboBox
5713  *
5714  * Returns the column which @combo_box is using to get string IDs
5715  * for values from.
5716  *
5717  * Return value: A column in the data source model of @combo_box.
5718  *
5719  * Since: 3.0
5720  */
5721 gint
5722 gtk_combo_box_get_id_column (GtkComboBox *combo_box)
5723 {
5724   g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), 0);
5725
5726   return combo_box->priv->id_column;
5727 }
5728
5729 /**
5730  * gtk_combo_box_get_active_id:
5731  * @combo_box: a #GtkComboBox
5732  *
5733  * Returns the ID of the active row of @combo_box.  This value is taken
5734  * from the active row and the column specified by the #GtkComboBox:id-column
5735  * property of @combo_box (see gtk_combo_box_set_id_column()).
5736  *
5737  * The returned value is an interned string which means that you can
5738  * compare the pointer by value to other interned strings and that you
5739  * must not free it.
5740  *
5741  * If the #GtkComboBox:id-column property of @combo_box is not set, or if
5742  * no row is active, or if the active row has a %NULL ID value, then %NULL
5743  * is returned.
5744  *
5745  * Return value: the ID of the active row, or %NULL
5746  *
5747  * Since: 3.0
5748  **/
5749 const gchar *
5750 gtk_combo_box_get_active_id (GtkComboBox *combo_box)
5751 {
5752   GtkTreeModel *model;
5753   GtkTreeIter iter;
5754   gint column;
5755
5756   g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), NULL);
5757
5758   column = combo_box->priv->id_column;
5759
5760   if (column < 0)
5761     return NULL;
5762
5763   model = gtk_combo_box_get_model (combo_box);
5764   g_return_val_if_fail (gtk_tree_model_get_column_type (model, column) ==
5765                         G_TYPE_STRING, NULL);
5766
5767   if (gtk_combo_box_get_active_iter (combo_box, &iter))
5768     {
5769       const gchar *interned;
5770       gchar *id;
5771
5772       gtk_tree_model_get (model, &iter, column, &id, -1);
5773       interned = g_intern_string (id);
5774       g_free (id);
5775
5776       return interned;
5777     }
5778
5779   return NULL;
5780 }
5781
5782 /**
5783  * gtk_combo_box_set_active_id:
5784  * @combo_box: a #GtkComboBox
5785  * @active_id: (allow-none): the ID of the row to select, or %NULL
5786  *
5787  * Changes the active row of @combo_box to the one that has an ID equal to
5788  * @active_id, or unsets the active row if @active_id is %NULL.  Rows having
5789  * a %NULL ID string cannot be made active by this function.
5790  *
5791  * If the #GtkComboBox:id-column property of @combo_box is unset or if no
5792  * row has the given ID then the function does nothing and returns %FALSE.
5793  *
5794  * Returns: %TRUE if a row with a matching ID was found.  If a %NULL
5795  *          @active_id was given to unset the active row, the function
5796  *          always returns %TRUE.
5797  *
5798  * Since: 3.0
5799  **/
5800 gboolean
5801 gtk_combo_box_set_active_id (GtkComboBox *combo_box,
5802                              const gchar *active_id)
5803 {
5804   GtkTreeModel *model;
5805   GtkTreeIter iter;
5806   gboolean match = FALSE;
5807   gint column;
5808
5809   g_return_val_if_fail (GTK_IS_COMBO_BOX (combo_box), FALSE);
5810
5811   if (active_id == NULL)
5812     {
5813       gtk_combo_box_set_active (combo_box, -1);
5814       return TRUE;  /* active row was successfully unset */
5815     }
5816
5817   column = combo_box->priv->id_column;
5818
5819   if (column < 0)
5820     return FALSE;
5821
5822   model = gtk_combo_box_get_model (combo_box);
5823   g_return_val_if_fail (gtk_tree_model_get_column_type (model, column) ==
5824                         G_TYPE_STRING, FALSE);
5825
5826   if (gtk_tree_model_get_iter_first (model, &iter))
5827     do {
5828       gchar *id;
5829
5830       gtk_tree_model_get (model, &iter, column, &id, -1);
5831       if (id != NULL)
5832         match = strcmp (id, active_id) == 0;
5833       g_free (id);
5834
5835       if (match)
5836         {
5837           gtk_combo_box_set_active_iter (combo_box, &iter);
5838           break;
5839         }
5840     } while (gtk_tree_model_iter_next (model, &iter));
5841
5842     return match;
5843 }