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

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser 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  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser 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 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include "config.h"
  28
  29 #include "gtkpaned.h"
  30
  31 #include "gtkbindings.h"
  32 #include "gtkmain.h"
  33 #include "gtkmarshalers.h"
  34 #include "gtkorientable.h"
  35 #include "gtkwindow.h"
  36 #include "gtktypebuiltins.h"
  37 #include "gtkprivate.h"
  38 #include "gtkintl.h"
  39 #include "a11y/gtkpanedaccessible.h"
  40
  41 /**
  42  * SECTION:gtkpaned
  43  * @Short_description: A widget with two adjustable panes
  44  * @Title: GtkPaned
  45  *
  46  * #GtkPaned has two panes, arranged either
  47  * horizontally or vertically. The division between
  48  * the two panes is adjustable by the user by dragging
  49  * a handle.
  50  *
  51  * Child widgets are
  52  * added to the panes of the widget with gtk_paned_pack1() and
  53  * gtk_paned_pack2(). The division between the two children is set by default
  54  * from the size requests of the children, but it can be adjusted by the
  55  * user.
  56  *
  57  * A paned widget draws a separator between the two child widgets and a
  58  * small handle that the user can drag to adjust the division. It does not
  59  * draw any relief around the children or around the separator. (The space
  60  * in which the separator is called the gutter.) Often, it is useful to put
  61  * each child inside a #GtkFrame with the shadow type set to %GTK_SHADOW_IN
  62  * so that the gutter appears as a ridge. No separator is drawn if one of
  63  * the children is missing.
  64  *
  65  * Each child has two options that can be set, @resize and @shrink. If
  66  * @resize is true, then when the #GtkPaned is resized, that child will
  67  * expand or shrink along with the paned widget. If @shrink is true, then
  68  * that child can be made smaller than its requisition by the user.
  69  * Setting @shrink to %FALSE allows the application to set a minimum size.
  70  * If @resize is false for both children, then this is treated as if
  71  * @resize is true for both children.
  72  *
  73  * The application can set the position of the slider as if it were set
  74  * by the user, by calling gtk_paned_set_position().
  75  *
  76  * <example>
  77  * <title>Creating a paned widget with minimum sizes.</title>
  78  * <programlisting>
  79  * GtkWidget *hpaned = gtk_paned_new (GTK_ORIENTATION_HORIZONTAL);
  80  * GtkWidget *frame1 = gtk_frame_new (NULL);
  81  * GtkWidget *frame2 = gtk_frame_new (NULL);
  82  * gtk_frame_set_shadow_type (GTK_FRAME (frame1), GTK_SHADOW_IN);
  83  * gtk_frame_set_shadow_type (GTK_FRAME (frame2), GTK_SHADOW_IN);
  84  *
  85  * gtk_widget_set_size_request (hpaned, 200, -1);
  86  *
  87  * gtk_paned_pack1 (GTK_PANED (hpaned), frame1, TRUE, FALSE);
  88  * gtk_widget_set_size_request (frame1, 50, -1);
  89  *
  90  * gtk_paned_pack2 (GTK_PANED (hpaned), frame2, FALSE, FALSE);
  91  * gtk_widget_set_size_request (frame2, 50, -1);
  92  * </programlisting>
  93  * </example>
  94  */
  95
  96 enum {
  97   CHILD1,
  98   CHILD2
  99 };
 100
 101 struct _GtkPanedPrivate
 102 {
 103   GtkPaned       *first_paned;
 104   GtkWidget      *child1;
 105   GtkWidget      *child2;
 106   GdkWindow      *child1_window;
 107   GdkWindow      *child2_window;
 108   GtkWidget      *last_child1_focus;
 109   GtkWidget      *last_child2_focus;
 110   GtkWidget      *saved_focus;
 111   GtkOrientation  orientation;
 112
 113   GdkCursorType  cursor_type;
 114   GdkDevice     *grab_device;
 115   GdkRectangle   handle_pos;
 116   GdkWindow     *handle;
 117
 118   gint          child1_size;
 119   gint          drag_pos;
 120   gint          last_allocation;
 121   gint          max_position;
 122   gint          min_position;
 123   gint          original_position;
 124
 125   guint32       grab_time;
 126
 127   guint         handle_prelit : 1;
 128   guint         in_drag       : 1;
 129   guint         in_recursion  : 1;
 130   guint         child1_resize : 1;
 131   guint         child1_shrink : 1;
 132   guint         child2_resize : 1;
 133   guint         child2_shrink : 1;
 134   guint         position_set  : 1;
 135 };
 136
 137 enum {
 138   PROP_0,
 139   PROP_ORIENTATION,
 140   PROP_POSITION,
 141   PROP_POSITION_SET,
 142   PROP_MIN_POSITION,
 143   PROP_MAX_POSITION
 144 };
 145
 146 enum {
 147   CHILD_PROP_0,
 148   CHILD_PROP_RESIZE,
 149   CHILD_PROP_SHRINK
 150 };
 151
 152 enum {
 153   CYCLE_CHILD_FOCUS,
 154   TOGGLE_HANDLE_FOCUS,
 155   MOVE_HANDLE,
 156   CYCLE_HANDLE_FOCUS,
 157   ACCEPT_POSITION,
 158   CANCEL_POSITION,
 159   LAST_SIGNAL
 160 };
 161
 162 static void     gtk_paned_set_property          (GObject          *object,
 163                                                  guint             prop_id,
 164                                                  const GValue     *value,
 165                                                  GParamSpec       *pspec);
 166 static void     gtk_paned_get_property          (GObject          *object,
 167                                                  guint             prop_id,
 168                                                  GValue           *value,
 169                                                  GParamSpec       *pspec);
 170 static void     gtk_paned_set_child_property    (GtkContainer     *container,
 171                                                  GtkWidget        *child,
 172                                                  guint             property_id,
 173                                                  const GValue     *value,
 174                                                  GParamSpec       *pspec);
 175 static void     gtk_paned_get_child_property    (GtkContainer     *container,
 176                                                  GtkWidget        *child,
 177                                                  guint             property_id,
 178                                                  GValue           *value,
 179                                                  GParamSpec       *pspec);
 180 static void     gtk_paned_finalize              (GObject          *object);
 181
 182 static void     gtk_paned_get_preferred_width   (GtkWidget        *widget,
 183                                                  gint             *minimum,
 184                                                  gint             *natural);
 185 static void     gtk_paned_get_preferred_height  (GtkWidget        *widget,
 186                                                  gint             *minimum,
 187                                                  gint             *natural);
 188 static void     gtk_paned_get_preferred_width_for_height
 189                                                 (GtkWidget        *widget,
 190                                                  gint              height,
 191                                                  gint             *minimum,
 192                                                  gint             *natural);
 193 static void     gtk_paned_get_preferred_height_for_width
 194                                                 (GtkWidget        *widget,
 195                                                  gint              width,
 196                                                  gint             *minimum,
 197                                                  gint              *natural);
 198
 199 static void     gtk_paned_size_allocate         (GtkWidget        *widget,
 200                                                  GtkAllocation    *allocation);
 201 static void     gtk_paned_realize               (GtkWidget        *widget);
 202 static void     gtk_paned_unrealize             (GtkWidget        *widget);
 203 static void     gtk_paned_map                   (GtkWidget        *widget);
 204 static void     gtk_paned_unmap                 (GtkWidget        *widget);
 205 static void     gtk_paned_state_flags_changed   (GtkWidget        *widget,
 206                                                  GtkStateFlags     previous_state);
 207 static gboolean gtk_paned_draw                  (GtkWidget        *widget,
 208                                                  cairo_t          *cr);
 209 static gboolean gtk_paned_enter                 (GtkWidget        *widget,
 210                                                  GdkEventCrossing *event);
 211 static gboolean gtk_paned_leave                 (GtkWidget        *widget,
 212                                                  GdkEventCrossing *event);
 213 static gboolean gtk_paned_button_press          (GtkWidget        *widget,
 214                                                  GdkEventButton   *event);
 215 static gboolean gtk_paned_button_release        (GtkWidget        *widget,
 216                                                  GdkEventButton   *event);
 217 static gboolean gtk_paned_motion                (GtkWidget        *widget,
 218                                                  GdkEventMotion   *event);
 219 static gboolean gtk_paned_focus                 (GtkWidget        *widget,
 220                                                  GtkDirectionType  direction);
 221 static gboolean gtk_paned_grab_broken           (GtkWidget          *widget,
 222                                                  GdkEventGrabBroken *event);
 223 static void     gtk_paned_add                   (GtkContainer     *container,
 224                                                  GtkWidget        *widget);
 225 static void     gtk_paned_remove                (GtkContainer     *container,
 226                                                  GtkWidget        *widget);
 227 static void     gtk_paned_forall                (GtkContainer     *container,
 228                                                  gboolean          include_internals,
 229                                                  GtkCallback       callback,
 230                                                  gpointer          callback_data);
 231 static void     gtk_paned_calc_position         (GtkPaned         *paned,
 232                                                  gint              allocation,
 233                                                  gint              child1_req,
 234                                                  gint              child2_req);
 235 static void     gtk_paned_set_focus_child       (GtkContainer     *container,
 236                                                  GtkWidget        *child);
 237 static void     gtk_paned_set_saved_focus       (GtkPaned         *paned,
 238                                                  GtkWidget        *widget);
 239 static void     gtk_paned_set_first_paned       (GtkPaned         *paned,
 240                                                  GtkPaned         *first_paned);
 241 static void     gtk_paned_set_last_child1_focus (GtkPaned         *paned,
 242                                                  GtkWidget        *widget);
 243 static void     gtk_paned_set_last_child2_focus (GtkPaned         *paned,
 244                                                  GtkWidget        *widget);
 245 static gboolean gtk_paned_cycle_child_focus     (GtkPaned         *paned,
 246                                                  gboolean          reverse);
 247 static gboolean gtk_paned_cycle_handle_focus    (GtkPaned         *paned,
 248                                                  gboolean          reverse);
 249 static gboolean gtk_paned_move_handle           (GtkPaned         *paned,
 250                                                  GtkScrollType     scroll);
 251 static gboolean gtk_paned_accept_position       (GtkPaned         *paned);
 252 static gboolean gtk_paned_cancel_position       (GtkPaned         *paned);
 253 static gboolean gtk_paned_toggle_handle_focus   (GtkPaned         *paned);
 254
 255 static GType    gtk_paned_child_type            (GtkContainer     *container);
 256 static void     gtk_paned_grab_notify           (GtkWidget        *widget,
 257                                                  gboolean          was_grabbed);
 258
 259
 260 G_DEFINE_TYPE_WITH_CODE (GtkPaned, gtk_paned, GTK_TYPE_CONTAINER,
 261                          G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE,
 262                                                 NULL))
 263
 264 static guint signals[LAST_SIGNAL] = { 0 };
 265
 266
 267 static void
 268 add_tab_bindings (GtkBindingSet    *binding_set,
 269                   GdkModifierType   modifiers)
 270 {
 271   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Tab, modifiers,
 272                                 "toggle-handle-focus", 0);
 273   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Tab, modifiers,
 274                                 "toggle-handle-focus", 0);
 275 }
 276
 277 static void
 278 add_move_binding (GtkBindingSet   *binding_set,
 279                   guint            keyval,
 280                   GdkModifierType  mask,
 281                   GtkScrollType    scroll)
 282 {
 283   gtk_binding_entry_add_signal (binding_set, keyval, mask,
 284                                 "move-handle", 1,
 285                                 GTK_TYPE_SCROLL_TYPE, scroll);
 286 }
 287
 288 static void
 289 gtk_paned_class_init (GtkPanedClass *class)
 290 {
 291   GObjectClass *object_class;
 292   GtkWidgetClass *widget_class;
 293   GtkContainerClass *container_class;
 294   GtkPanedClass *paned_class;
 295   GtkBindingSet *binding_set;
 296
 297   object_class = (GObjectClass *) class;
 298   widget_class = (GtkWidgetClass *) class;
 299   container_class = (GtkContainerClass *) class;
 300   paned_class = (GtkPanedClass *) class;
 301
 302   object_class->set_property = gtk_paned_set_property;
 303   object_class->get_property = gtk_paned_get_property;
 304   object_class->finalize = gtk_paned_finalize;
 305
 306   widget_class->get_preferred_width = gtk_paned_get_preferred_width;
 307   widget_class->get_preferred_height = gtk_paned_get_preferred_height;
 308   widget_class->get_preferred_width_for_height = gtk_paned_get_preferred_width_for_height;
 309   widget_class->get_preferred_height_for_width = gtk_paned_get_preferred_height_for_width;
 310   widget_class->size_allocate = gtk_paned_size_allocate;
 311   widget_class->realize = gtk_paned_realize;
 312   widget_class->unrealize = gtk_paned_unrealize;
 313   widget_class->map = gtk_paned_map;
 314   widget_class->unmap = gtk_paned_unmap;
 315   widget_class->draw = gtk_paned_draw;
 316   widget_class->focus = gtk_paned_focus;
 317   widget_class->enter_notify_event = gtk_paned_enter;
 318   widget_class->leave_notify_event = gtk_paned_leave;
 319   widget_class->button_press_event = gtk_paned_button_press;
 320   widget_class->button_release_event = gtk_paned_button_release;
 321   widget_class->motion_notify_event = gtk_paned_motion;
 322   widget_class->grab_broken_event = gtk_paned_grab_broken;
 323   widget_class->grab_notify = gtk_paned_grab_notify;
 324   widget_class->state_flags_changed = gtk_paned_state_flags_changed;
 325
 326   container_class->add = gtk_paned_add;
 327   container_class->remove = gtk_paned_remove;
 328   container_class->forall = gtk_paned_forall;
 329   container_class->child_type = gtk_paned_child_type;
 330   container_class->set_focus_child = gtk_paned_set_focus_child;
 331   container_class->set_child_property = gtk_paned_set_child_property;
 332   container_class->get_child_property = gtk_paned_get_child_property;
 333   gtk_container_class_handle_border_width (container_class);
 334
 335   paned_class->cycle_child_focus = gtk_paned_cycle_child_focus;
 336   paned_class->toggle_handle_focus = gtk_paned_toggle_handle_focus;
 337   paned_class->move_handle = gtk_paned_move_handle;
 338   paned_class->cycle_handle_focus = gtk_paned_cycle_handle_focus;
 339   paned_class->accept_position = gtk_paned_accept_position;
 340   paned_class->cancel_position = gtk_paned_cancel_position;
 341
 342   g_object_class_override_property (object_class,
 343                                     PROP_ORIENTATION,
 344                                     "orientation");
 345
 346   g_object_class_install_property (object_class,
 347                                    PROP_POSITION,
 348                                    g_param_spec_int ("position",
 349                                                      P_("Position"),
 350                                                      P_("Position of paned separator in pixels (0 means all the way to the left/top)"),
 351                                                      0,
 352                                                      G_MAXINT,
 353                                                      0,
 354                                                      GTK_PARAM_READWRITE));
 355
 356   g_object_class_install_property (object_class,
 357                                    PROP_POSITION_SET,
 358                                    g_param_spec_boolean ("position-set",
 359                                                          P_("Position Set"),
 360                                                          P_("TRUE if the Position property should be used"),
 361                                                          FALSE,
 362                                                          GTK_PARAM_READWRITE));
 363
 364   gtk_widget_class_install_style_property (widget_class,
 365                                            g_param_spec_int ("handle-size",
 366                                                              P_("Handle Size"),
 367                                                              P_("Width of handle"),
 368                                                              0,
 369                                                              G_MAXINT,
 370                                                              5,
 371                                                              GTK_PARAM_READABLE));
 372   /**
 373    * GtkPaned:min-position:
 374    *
 375    * The smallest possible value for the position property. This property is derived from the
 376    * size and shrinkability of the widget's children.
 377    *
 378    * Since: 2.4
 379    */
 380   g_object_class_install_property (object_class,
 381                                    PROP_MIN_POSITION,
 382                                    g_param_spec_int ("min-position",
 383                                                      P_("Minimal Position"),
 384                                                      P_("Smallest possible value for the \"position\" property"),
 385                                                      0,
 386                                                      G_MAXINT,
 387                                                      0,
 388                                                      GTK_PARAM_READABLE));
 389
 390   /**
 391    * GtkPaned:max-position:
 392    *
 393    * The largest possible value for the position property. This property is derived from the
 394    * size and shrinkability of the widget's children.
 395    *
 396    * Since: 2.4
 397    */
 398   g_object_class_install_property (object_class,
 399                                    PROP_MAX_POSITION,
 400                                    g_param_spec_int ("max-position",
 401                                                      P_("Maximal Position"),
 402                                                      P_("Largest possible value for the \"position\" property"),
 403                                                      0,
 404                                                      G_MAXINT,
 405                                                      G_MAXINT,
 406                                                      GTK_PARAM_READABLE));
 407
 408   /**
 409    * GtkPaned:resize:
 410    *
 411    * The "resize" child property determines whether the child expands and
 412    * shrinks along with the paned widget.
 413    *
 414    * Since: 2.4
 415    */
 416   gtk_container_class_install_child_property (container_class,
 417                                               CHILD_PROP_RESIZE,
 418                                               g_param_spec_boolean ("resize",
 419                                                                     P_("Resize"),
 420                                                                     P_("If TRUE, the child expands and shrinks along with the paned widget"),
 421                                                                     TRUE,
 422                                                                     GTK_PARAM_READWRITE));
 423
 424   /**
 425    * GtkPaned:shrink:
 426    *
 427    * The "shrink" child property determines whether the child can be made
 428    * smaller than its requisition.
 429    *
 430    * Since: 2.4
 431    */
 432   gtk_container_class_install_child_property (container_class,
 433                                               CHILD_PROP_SHRINK,
 434                                               g_param_spec_boolean ("shrink",
 435                                                                     P_("Shrink"),
 436                                                                     P_("If TRUE, the child can be made smaller than its requisition"),
 437                                                                     TRUE,
 438                                                                     GTK_PARAM_READWRITE));
 439
 440   /**
 441    * GtkPaned::cycle-child-focus:
 442    * @widget: the object that received the signal
 443    * @reversed: whether cycling backward or forward
 444    *
 445    * The ::cycle-child-focus signal is a
 446    * <link linkend="keybinding-signals">keybinding signal</link>
 447    * which gets emitted to cycle the focus between the children of the paned.
 448    *
 449    * The default binding is f6.
 450    *
 451    * Since: 2.0
 452    */
 453   signals [CYCLE_CHILD_FOCUS] =
 454     g_signal_new (I_("cycle-child-focus"),
 455                   G_TYPE_FROM_CLASS (object_class),
 456                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 457                   G_STRUCT_OFFSET (GtkPanedClass, cycle_child_focus),
 458                   NULL, NULL,
 459                   _gtk_marshal_BOOLEAN__BOOLEAN,
 460                   G_TYPE_BOOLEAN, 1,
 461                   G_TYPE_BOOLEAN);
 462
 463   /**
 464    * GtkPaned::toggle-handle-focus:
 465    * @widget: the object that received the signal
 466    *
 467    * The ::toggle-handle-focus is a
 468    * <link linkend="keybinding-signals">keybinding signal</link>
 469    * which gets emitted to accept the current position of the handle and then
 470    * move focus to the next widget in the focus chain.
 471    *
 472    * The default binding is Tab.
 473    *
 474    * Since: 2.0
 475    */
 476   signals [TOGGLE_HANDLE_FOCUS] =
 477     g_signal_new (I_("toggle-handle-focus"),
 478                   G_TYPE_FROM_CLASS (object_class),
 479                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 480                   G_STRUCT_OFFSET (GtkPanedClass, toggle_handle_focus),
 481                   NULL, NULL,
 482                   _gtk_marshal_BOOLEAN__VOID,
 483                   G_TYPE_BOOLEAN, 0);
 484
 485   /**
 486    * GtkPaned::move-handle:
 487    * @widget: the object that received the signal
 488    * @scroll_type: a #GtkScrollType
 489    *
 490    * The ::move-handle signal is a
 491    * <link linkend="keybinding-signals">keybinding signal</link>
 492    * which gets emitted to move the handle when the user is using key bindings
 493    * to move it.
 494    *
 495    * Since: 2.0
 496    */
 497   signals[MOVE_HANDLE] =
 498     g_signal_new (I_("move-handle"),
 499                   G_TYPE_FROM_CLASS (object_class),
 500                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 501                   G_STRUCT_OFFSET (GtkPanedClass, move_handle),
 502                   NULL, NULL,
 503                   _gtk_marshal_BOOLEAN__ENUM,
 504                   G_TYPE_BOOLEAN, 1,
 505                   GTK_TYPE_SCROLL_TYPE);
 506
 507   /**
 508    * GtkPaned::cycle-handle-focus:
 509    * @widget: the object that received the signal
 510    * @reversed: whether cycling backward or forward
 511    *
 512    * The ::cycle-handle-focus signal is a
 513    * <link linkend="keybinding-signals">keybinding signal</link>
 514    * which gets emitted to cycle whether the paned should grab focus to allow
 515    * the user to change position of the handle by using key bindings.
 516    *
 517    * The default binding for this signal is f8.
 518    *
 519    * Since: 2.0
 520    */
 521   signals [CYCLE_HANDLE_FOCUS] =
 522     g_signal_new (I_("cycle-handle-focus"),
 523                   G_TYPE_FROM_CLASS (object_class),
 524                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 525                   G_STRUCT_OFFSET (GtkPanedClass, cycle_handle_focus),
 526                   NULL, NULL,
 527                   _gtk_marshal_BOOLEAN__BOOLEAN,
 528                   G_TYPE_BOOLEAN, 1,
 529                   G_TYPE_BOOLEAN);
 530
 531   /**
 532    * GtkPaned::accept-position:
 533    * @widget: the object that received the signal
 534    *
 535    * The ::accept-position signal is a
 536    * <link linkend="keybinding-signals">keybinding signal</link>
 537    * which gets emitted to accept the current position of the handle when
 538    * moving it using key bindings.
 539    *
 540    * The default binding for this signal is Return or Space.
 541    *
 542    * Since: 2.0
 543    */
 544   signals [ACCEPT_POSITION] =
 545     g_signal_new (I_("accept-position"),
 546                   G_TYPE_FROM_CLASS (object_class),
 547                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 548                   G_STRUCT_OFFSET (GtkPanedClass, accept_position),
 549                   NULL, NULL,
 550                   _gtk_marshal_BOOLEAN__VOID,
 551                   G_TYPE_BOOLEAN, 0);
 552
 553   /**
 554    * GtkPaned::cancel-position:
 555    * @widget: the object that received the signal
 556    *
 557    * The ::cancel-position signal is a
 558    * <link linkend="keybinding-signals">keybinding signal</link>
 559    * which gets emitted to cancel moving the position of the handle using key
 560    * bindings. The position of the handle will be reset to the value prior to
 561    * moving it.
 562    *
 563    * The default binding for this signal is Escape.
 564    *
 565    * Since: 2.0
 566    */
 567   signals [CANCEL_POSITION] =
 568     g_signal_new (I_("cancel-position"),
 569                   G_TYPE_FROM_CLASS (object_class),
 570                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 571                   G_STRUCT_OFFSET (GtkPanedClass, cancel_position),
 572                   NULL, NULL,
 573                   _gtk_marshal_BOOLEAN__VOID,
 574                   G_TYPE_BOOLEAN, 0);
 575
 576   binding_set = gtk_binding_set_by_class (class);
 577
 578   /* F6 and friends */
 579   gtk_binding_entry_add_signal (binding_set,
 580                                 GDK_KEY_F6, 0,
 581                                 "cycle-child-focus", 1,
 582                                 G_TYPE_BOOLEAN, FALSE);
 583   gtk_binding_entry_add_signal (binding_set,
 584                                 GDK_KEY_F6, GDK_SHIFT_MASK,
 585                                 "cycle-child-focus", 1,
 586                                 G_TYPE_BOOLEAN, TRUE);
 587
 588   /* F8 and friends */
 589   gtk_binding_entry_add_signal (binding_set,
 590                                 GDK_KEY_F8, 0,
 591                                 "cycle-handle-focus", 1,
 592                                 G_TYPE_BOOLEAN, FALSE);
 593
 594   gtk_binding_entry_add_signal (binding_set,
 595                                 GDK_KEY_F8, GDK_SHIFT_MASK,
 596                                 "cycle-handle-focus", 1,
 597                                 G_TYPE_BOOLEAN, TRUE);
 598
 599   add_tab_bindings (binding_set, 0);
 600   add_tab_bindings (binding_set, GDK_CONTROL_MASK);
 601   add_tab_bindings (binding_set, GDK_SHIFT_MASK);
 602   add_tab_bindings (binding_set, GDK_CONTROL_MASK | GDK_SHIFT_MASK);
 603
 604   /* accept and cancel positions */
 605   gtk_binding_entry_add_signal (binding_set,
 606                                 GDK_KEY_Escape, 0,
 607                                 "cancel-position", 0);
 608
 609   gtk_binding_entry_add_signal (binding_set,
 610                                 GDK_KEY_Return, 0,
 611                                 "accept-position", 0);
 612   gtk_binding_entry_add_signal (binding_set,
 613                                 GDK_KEY_ISO_Enter, 0,
 614                                 "accept-position", 0);
 615   gtk_binding_entry_add_signal (binding_set,
 616                                 GDK_KEY_KP_Enter, 0,
 617                                 "accept-position", 0);
 618   gtk_binding_entry_add_signal (binding_set,
 619                                 GDK_KEY_space, 0,
 620                                 "accept-position", 0);
 621   gtk_binding_entry_add_signal (binding_set,
 622                                 GDK_KEY_KP_Space, 0,
 623                                 "accept-position", 0);
 624
 625   /* move handle */
 626   add_move_binding (binding_set, GDK_KEY_Left, 0, GTK_SCROLL_STEP_LEFT);
 627   add_move_binding (binding_set, GDK_KEY_KP_Left, 0, GTK_SCROLL_STEP_LEFT);
 628   add_move_binding (binding_set, GDK_KEY_Left, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_LEFT);
 629   add_move_binding (binding_set, GDK_KEY_KP_Left, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_LEFT);
 630
 631   add_move_binding (binding_set, GDK_KEY_Right, 0, GTK_SCROLL_STEP_RIGHT);
 632   add_move_binding (binding_set, GDK_KEY_Right, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_RIGHT);
 633   add_move_binding (binding_set, GDK_KEY_KP_Right, 0, GTK_SCROLL_STEP_RIGHT);
 634   add_move_binding (binding_set, GDK_KEY_KP_Right, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_RIGHT);
 635
 636   add_move_binding (binding_set, GDK_KEY_Up, 0, GTK_SCROLL_STEP_UP);
 637   add_move_binding (binding_set, GDK_KEY_Up, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_UP);
 638   add_move_binding (binding_set, GDK_KEY_KP_Up, 0, GTK_SCROLL_STEP_UP);
 639   add_move_binding (binding_set, GDK_KEY_KP_Up, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_UP);
 640   add_move_binding (binding_set, GDK_KEY_Page_Up, 0, GTK_SCROLL_PAGE_UP);
 641   add_move_binding (binding_set, GDK_KEY_KP_Page_Up, 0, GTK_SCROLL_PAGE_UP);
 642
 643   add_move_binding (binding_set, GDK_KEY_Down, 0, GTK_SCROLL_STEP_DOWN);
 644   add_move_binding (binding_set, GDK_KEY_Down, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_DOWN);
 645   add_move_binding (binding_set, GDK_KEY_KP_Down, 0, GTK_SCROLL_STEP_DOWN);
 646   add_move_binding (binding_set, GDK_KEY_KP_Down, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_DOWN);
 647   add_move_binding (binding_set, GDK_KEY_Page_Down, 0, GTK_SCROLL_PAGE_RIGHT);
 648   add_move_binding (binding_set, GDK_KEY_KP_Page_Down, 0, GTK_SCROLL_PAGE_RIGHT);
 649
 650   add_move_binding (binding_set, GDK_KEY_Home, 0, GTK_SCROLL_START);
 651   add_move_binding (binding_set, GDK_KEY_KP_Home, 0, GTK_SCROLL_START);
 652   add_move_binding (binding_set, GDK_KEY_End, 0, GTK_SCROLL_END);
 653   add_move_binding (binding_set, GDK_KEY_KP_End, 0, GTK_SCROLL_END);
 654
 655   g_type_class_add_private (object_class, sizeof (GtkPanedPrivate));
 656   gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_PANED_ACCESSIBLE);
 657 }
 658
 659 static GType
 660 gtk_paned_child_type (GtkContainer *container)
 661 {
 662   GtkPaned *paned = GTK_PANED (container);
 663   GtkPanedPrivate *priv = paned->priv;
 664
 665   if (!priv->child1 || !priv->child2)
 666     return GTK_TYPE_WIDGET;
 667   else
 668     return G_TYPE_NONE;
 669 }
 670
 671 static void
 672 gtk_paned_init (GtkPaned *paned)
 673 {
 674   GtkPanedPrivate *priv;
 675
 676   gtk_widget_set_has_window (GTK_WIDGET (paned), FALSE);
 677   gtk_widget_set_can_focus (GTK_WIDGET (paned), TRUE);
 678
 679   /* We only need to redraw when the handle position moves, which is
 680    * independent of the overall allocation of the GtkPaned
 681    */
 682   gtk_widget_set_redraw_on_allocate (GTK_WIDGET (paned), FALSE);
 683
 684   paned->priv = G_TYPE_INSTANCE_GET_PRIVATE (paned, GTK_TYPE_PANED, GtkPanedPrivate);
 685   priv = paned->priv;
 686
 687   priv->orientation = GTK_ORIENTATION_HORIZONTAL;
 688   priv->cursor_type = GDK_SB_H_DOUBLE_ARROW;
 689
 690   priv->child1 = NULL;
 691   priv->child2 = NULL;
 692   priv->handle = NULL;
 693   priv->cursor_type = GDK_CROSS;
 694
 695   priv->handle_pos.width = 5;
 696   priv->handle_pos.height = 5;
 697   priv->position_set = FALSE;
 698   priv->last_allocation = -1;
 699   priv->in_drag = FALSE;
 700
 701   priv->last_child1_focus = NULL;
 702   priv->last_child2_focus = NULL;
 703   priv->in_recursion = FALSE;
 704   priv->handle_prelit = FALSE;
 705   priv->original_position = -1;
 706
 707   priv->handle_pos.x = -1;
 708   priv->handle_pos.y = -1;
 709
 710   priv->drag_pos = -1;
 711 }
 712
 713 static void
 714 gtk_paned_set_property (GObject        *object,
 715                         guint           prop_id,
 716                         const GValue   *value,
 717                         GParamSpec     *pspec)
 718 {
 719   GtkPaned *paned = GTK_PANED (object);
 720   GtkPanedPrivate *priv = paned->priv;
 721
 722   switch (prop_id)
 723     {
 724     case PROP_ORIENTATION:
 725       priv->orientation = g_value_get_enum (value);
 726
 727       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
 728         priv->cursor_type = GDK_SB_H_DOUBLE_ARROW;
 729       else
 730         priv->cursor_type = GDK_SB_V_DOUBLE_ARROW;
 731
 732       /* state_flags_changed updates the cursor */
 733       gtk_paned_state_flags_changed (GTK_WIDGET (paned), 0);
 734       gtk_widget_queue_resize (GTK_WIDGET (paned));
 735       break;
 736     case PROP_POSITION:
 737       gtk_paned_set_position (paned, g_value_get_int (value));
 738       break;
 739     case PROP_POSITION_SET:
 740       priv->position_set = g_value_get_boolean (value);
 741       gtk_widget_queue_resize_no_redraw (GTK_WIDGET (paned));
 742       break;
 743     default:
 744       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 745       break;
 746     }
 747 }
 748
 749 static void
 750 gtk_paned_get_property (GObject        *object,
 751                         guint           prop_id,
 752                         GValue         *value,
 753                         GParamSpec     *pspec)
 754 {
 755   GtkPaned *paned = GTK_PANED (object);
 756   GtkPanedPrivate *priv = paned->priv;
 757
 758   switch (prop_id)
 759     {
 760     case PROP_ORIENTATION:
 761       g_value_set_enum (value, priv->orientation);
 762       break;
 763     case PROP_POSITION:
 764       g_value_set_int (value, priv->child1_size);
 765       break;
 766     case PROP_POSITION_SET:
 767       g_value_set_boolean (value, priv->position_set);
 768       break;
 769     case PROP_MIN_POSITION:
 770       g_value_set_int (value, priv->min_position);
 771       break;
 772     case PROP_MAX_POSITION:
 773       g_value_set_int (value, priv->max_position);
 774       break;
 775     default:
 776       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 777       break;
 778     }
 779 }
 780
 781 static void
 782 gtk_paned_set_child_property (GtkContainer    *container,
 783                               GtkWidget       *child,
 784                               guint            property_id,
 785                               const GValue    *value,
 786                               GParamSpec      *pspec)
 787 {
 788   GtkPaned *paned = GTK_PANED (container);
 789   GtkPanedPrivate *priv = paned->priv;
 790   gboolean old_value, new_value;
 791
 792   g_assert (child == priv->child1 || child == priv->child2);
 793
 794   new_value = g_value_get_boolean (value);
 795   switch (property_id)
 796     {
 797     case CHILD_PROP_RESIZE:
 798       if (child == priv->child1)
 799         {
 800           old_value = priv->child1_resize;
 801           priv->child1_resize = new_value;
 802         }
 803       else
 804         {
 805           old_value = priv->child2_resize;
 806           priv->child2_resize = new_value;
 807         }
 808       break;
 809     case CHILD_PROP_SHRINK:
 810       if (child == priv->child1)
 811         {
 812           old_value = priv->child1_shrink;
 813           priv->child1_shrink = new_value;
 814         }
 815       else
 816         {
 817           old_value = priv->child2_shrink;
 818           priv->child2_shrink = new_value;
 819         }
 820       break;
 821     default:
 822       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 823       old_value = -1; /* quiet gcc */
 824       break;
 825     }
 826   if (old_value != new_value)
 827     gtk_widget_queue_resize_no_redraw (GTK_WIDGET (container));
 828 }
 829
 830 static void
 831 gtk_paned_get_child_property (GtkContainer *container,
 832                               GtkWidget    *child,
 833                               guint         property_id,
 834                               GValue       *value,
 835                               GParamSpec   *pspec)
 836 {
 837   GtkPaned *paned = GTK_PANED (container);
 838   GtkPanedPrivate *priv = paned->priv;
 839
 840   g_assert (child == priv->child1 || child == priv->child2);
 841
 842   switch (property_id)
 843     {
 844     case CHILD_PROP_RESIZE:
 845       if (child == priv->child1)
 846         g_value_set_boolean (value, priv->child1_resize);
 847       else
 848         g_value_set_boolean (value, priv->child2_resize);
 849       break;
 850     case CHILD_PROP_SHRINK:
 851       if (child == priv->child1)
 852         g_value_set_boolean (value, priv->child1_shrink);
 853       else
 854         g_value_set_boolean (value, priv->child2_shrink);
 855       break;
 856     default:
 857       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 858       break;
 859     }
 860 }
 861
 862 static void
 863 gtk_paned_finalize (GObject *object)
 864 {
 865   GtkPaned *paned = GTK_PANED (object);
 866
 867   gtk_paned_set_saved_focus (paned, NULL);
 868   gtk_paned_set_first_paned (paned, NULL);
 869
 870   G_OBJECT_CLASS (gtk_paned_parent_class)->finalize (object);
 871 }
 872
 873 static void
 874 get_preferred_size_for_size (GtkWidget      *widget,
 875                              GtkOrientation  orientation,
 876                              gint            size,
 877                              gint           *minimum,
 878                              gint           *natural)
 879 {
 880   if (orientation == GTK_ORIENTATION_HORIZONTAL)
 881     if (size < 0)
 882       gtk_widget_get_preferred_width (widget, minimum, natural);
 883     else
 884       gtk_widget_get_preferred_width_for_height (widget, size, minimum, natural);
 885   else
 886     if (size < 0)
 887       gtk_widget_get_preferred_height (widget, minimum, natural);
 888     else
 889       gtk_widget_get_preferred_height_for_width (widget, size, minimum, natural);
 890 }
 891
 892 static void
 893 gtk_paned_get_preferred_size (GtkWidget      *widget,
 894                               GtkOrientation  orientation,
 895                               gint            size,
 896                               gint           *minimum,
 897                               gint           *natural)
 898 {
 899   GtkPaned *paned = GTK_PANED (widget);
 900   GtkPanedPrivate *priv = paned->priv;
 901   gint child_min, child_nat;
 902
 903   *minimum = *natural = 0;
 904
 905   if (priv->child1 && gtk_widget_get_visible (priv->child1))
 906     {
 907       get_preferred_size_for_size (priv->child1, orientation, size, &child_min, &child_nat);
 908       *minimum = child_min;
 909       *natural = child_nat;
 910     }
 911
 912   if (priv->child2 && gtk_widget_get_visible (priv->child2))
 913     {
 914       get_preferred_size_for_size (priv->child2, orientation, size, &child_min, &child_nat);
 915
 916       if (priv->orientation == orientation)
 917         {
 918           *minimum += child_min;
 919           *natural += child_nat;
 920         }
 921       else
 922         {
 923           *minimum = MAX (*minimum, child_min);
 924           *natural = MAX (*natural, child_nat);
 925         }
 926     }
 927
 928   if (priv->child1 && gtk_widget_get_visible (priv->child1) &&
 929       priv->child2 && gtk_widget_get_visible (priv->child2))
 930     {
 931       gint handle_size;
 932
 933       gtk_widget_style_get (widget, "handle-size", &handle_size, NULL);
 934
 935       if (priv->orientation == orientation)
 936         {
 937           *minimum += handle_size;
 938           *natural += handle_size;
 939         }
 940     }
 941 }
 942
 943 static void
 944 gtk_paned_get_preferred_width (GtkWidget *widget,
 945                                gint      *minimum,
 946                                gint      *natural)
 947 {
 948   gtk_paned_get_preferred_size (widget, GTK_ORIENTATION_HORIZONTAL, -1, minimum, natural);
 949 }
 950
 951 static void
 952 gtk_paned_get_preferred_height (GtkWidget *widget,
 953                                 gint      *minimum,
 954                                 gint      *natural)
 955 {
 956   gtk_paned_get_preferred_size (widget, GTK_ORIENTATION_VERTICAL, -1, minimum, natural);
 957 }
 958
 959 static void
 960 gtk_paned_get_preferred_width_for_height (GtkWidget *widget,
 961                                           gint       height,
 962                                           gint      *minimum,
 963                                           gint      *natural)
 964 {
 965   gtk_paned_get_preferred_size (widget, GTK_ORIENTATION_HORIZONTAL, height, minimum, natural);
 966 }
 967
 968 static void
 969 gtk_paned_get_preferred_height_for_width (GtkWidget *widget,
 970                                           gint       width,
 971                                           gint      *minimum,
 972                                           gint      *natural)
 973 {
 974   gtk_paned_get_preferred_size (widget, GTK_ORIENTATION_VERTICAL, width, minimum, natural);
 975 }
 976
 977 static void
 978 flip_child (GtkWidget     *widget,
 979             GtkAllocation *child_pos)
 980 {
 981   GtkAllocation allocation;
 982   gint x, width;
 983
 984   gtk_widget_get_allocation (widget, &allocation);
 985   x = allocation.x;
 986   width = allocation.width;
 987
 988   child_pos->x = 2 * x + width - child_pos->x - child_pos->width;
 989 }
 990
 991 static void
 992 gtk_paned_set_child_visible (GtkPaned  *paned,
 993                              guint      id,
 994                              gboolean   visible)
 995 {
 996   GtkPanedPrivate *priv = paned->priv;
 997   GtkWidget *child;
 998
 999   child = id == CHILD1 ? priv->child1 : priv->child2;
1000
1001   if (child == NULL)
1002     return;
1003
1004   gtk_widget_set_child_visible (child, visible);
1005
1006   if (gtk_widget_get_mapped (GTK_WIDGET (paned)))
1007     {
1008       GdkWindow *window = id == CHILD1 ? priv->child1_window : priv->child2_window;
1009
1010       if (visible != gdk_window_is_visible (window))
1011         {
1012           if (visible)
1013             gdk_window_show (window);
1014           else
1015             gdk_window_hide (window);
1016         }
1017     }
1018 }
1019
1020 static void
1021 gtk_paned_child_allocate (GtkWidget           *child,
1022                           GdkWindow           *child_window, /* can be NULL */
1023                           const GtkAllocation *window_allocation,
1024                           GtkAllocation       *child_allocation)
1025 {
1026   if (child_window)
1027     gdk_window_move_resize (child_window,
1028                             window_allocation->x, window_allocation->y,
1029                             window_allocation->width, window_allocation->height);
1030
1031   gtk_widget_size_allocate (child, child_allocation);
1032 }
1033
1034 static void
1035 gtk_paned_size_allocate (GtkWidget     *widget,
1036                          GtkAllocation *allocation)
1037 {
1038   GtkPaned *paned = GTK_PANED (widget);
1039   GtkPanedPrivate *priv = paned->priv;
1040
1041   gtk_widget_set_allocation (widget, allocation);
1042
1043   if (priv->child1 && gtk_widget_get_visible (priv->child1) &&
1044       priv->child2 && gtk_widget_get_visible (priv->child2))
1045     {
1046       GtkAllocation child1_allocation, window1_allocation;
1047       GtkAllocation child2_allocation, window2_allocation;
1048       GtkAllocation priv_child1_allocation;
1049       GdkRectangle old_handle_pos;
1050       gint handle_size;
1051
1052       gtk_widget_style_get (widget, "handle-size", &handle_size, NULL);
1053
1054       old_handle_pos = priv->handle_pos;
1055
1056       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
1057         {
1058           gint child1_width, child2_width;
1059
1060           gtk_widget_get_preferred_width_for_height (priv->child1,
1061                                                      allocation->height,
1062                                                      &child1_width, NULL);
1063           gtk_widget_get_preferred_width_for_height (priv->child2,
1064                                                      allocation->height,
1065                                                      &child2_width, NULL);
1066
1067           gtk_paned_calc_position (paned,
1068                                    MAX (1, allocation->width - handle_size),
1069                                    child1_width,
1070                                    child2_width);
1071
1072           priv->handle_pos.x = allocation->x + priv->child1_size;
1073           priv->handle_pos.y = allocation->y;
1074           priv->handle_pos.width = handle_size;
1075           priv->handle_pos.height = allocation->height;
1076
1077           window1_allocation.height = window2_allocation.height = allocation->height;
1078           window1_allocation.width = MAX (1, priv->child1_size);
1079           window1_allocation.x = allocation->x;
1080           window1_allocation.y = window2_allocation.y = allocation->y;
1081
1082           window2_allocation.x = window1_allocation.x + priv->child1_size + priv->handle_pos.width;
1083           window2_allocation.width = MAX (1, allocation->x + allocation->width - window2_allocation.x);
1084
1085           if (gtk_widget_get_direction (GTK_WIDGET (widget)) == GTK_TEXT_DIR_RTL)
1086             {
1087               flip_child (widget, &(window2_allocation));
1088               flip_child (widget, &(window1_allocation));
1089               flip_child (widget, &(priv->handle_pos));
1090             }
1091
1092           child1_allocation.x = child1_allocation.y = 0;
1093           child1_allocation.width = window1_allocation.width;
1094           child1_allocation.height = window1_allocation.height;
1095           if (child1_width > child1_allocation.width)
1096             {
1097               if (gtk_widget_get_direction (GTK_WIDGET (widget)) == GTK_TEXT_DIR_LTR)
1098                 child1_allocation.x -= child1_width - child1_allocation.width;
1099               child1_allocation.width = child1_width;
1100             }
1101
1102           child2_allocation.x = child2_allocation.y = 0;
1103           child2_allocation.width = window2_allocation.width;
1104           child2_allocation.height = window2_allocation.height;
1105           if (child2_width > child2_allocation.width)
1106             {
1107               if (gtk_widget_get_direction (GTK_WIDGET (widget)) == GTK_TEXT_DIR_RTL)
1108                 child2_allocation.x -= child2_width - child2_allocation.width;
1109               child2_allocation.width = child2_width;
1110             }
1111         }
1112       else
1113         {
1114           gint child1_height, child2_height;
1115
1116           gtk_widget_get_preferred_height_for_width (priv->child1,
1117                                                      allocation->width,
1118                                                      &child1_height, NULL);
1119           gtk_widget_get_preferred_height_for_width (priv->child2,
1120                                                      allocation->width,
1121                                                      &child2_height, NULL);
1122
1123           gtk_paned_calc_position (paned,
1124                                    MAX (1, allocation->height - handle_size),
1125                                    child1_height,
1126                                    child2_height);
1127
1128           priv->handle_pos.x = allocation->x;
1129           priv->handle_pos.y = allocation->y + priv->child1_size;
1130           priv->handle_pos.width = allocation->width;
1131           priv->handle_pos.height = handle_size;
1132
1133           window1_allocation.width = window2_allocation.width = allocation->width;
1134           window1_allocation.height = MAX (1, priv->child1_size);
1135           window1_allocation.x = window2_allocation.x = allocation->x;
1136           window1_allocation.y = allocation->y;
1137
1138           window2_allocation.y = window1_allocation.y + priv->child1_size + priv->handle_pos.height;
1139           window2_allocation.height = MAX (1, allocation->y + allocation->height - window2_allocation.y);
1140
1141           child1_allocation.x = child1_allocation.y = 0;
1142           child1_allocation.width = window1_allocation.width;
1143           child1_allocation.height = window1_allocation.height;
1144           if (child1_height > child1_allocation.height)
1145             {
1146               child1_allocation.y -= child1_height - child1_allocation.height;
1147               child1_allocation.height = child1_height;
1148             }
1149
1150           child2_allocation.x = child2_allocation.y = 0;
1151           child2_allocation.width = window2_allocation.width;
1152           child2_allocation.height = window2_allocation.height;
1153           if (child2_height > child2_allocation.height)
1154             child2_allocation.height = child2_height;
1155         }
1156
1157       if (gtk_widget_get_mapped (widget) &&
1158           (old_handle_pos.x != priv->handle_pos.x ||
1159            old_handle_pos.y != priv->handle_pos.y ||
1160            old_handle_pos.width != priv->handle_pos.width ||
1161            old_handle_pos.height != priv->handle_pos.height))
1162         {
1163           GdkWindow *window;
1164
1165           window = gtk_widget_get_window (widget);
1166           gdk_window_invalidate_rect (window, &old_handle_pos, FALSE);
1167           gdk_window_invalidate_rect (window, &priv->handle_pos, FALSE);
1168         }
1169
1170       if (gtk_widget_get_realized (widget))
1171         {
1172           if (gtk_widget_get_mapped (widget))
1173             gdk_window_show (priv->handle);
1174
1175           if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
1176             {
1177               gdk_window_move_resize (priv->handle,
1178                                       priv->handle_pos.x,
1179                                       priv->handle_pos.y,
1180                                       handle_size,
1181                                       priv->handle_pos.height);
1182             }
1183           else
1184             {
1185               gdk_window_move_resize (priv->handle,
1186                                       priv->handle_pos.x,
1187                                       priv->handle_pos.y,
1188                                       priv->handle_pos.width,
1189                                       handle_size);
1190             }
1191         }
1192
1193       /* Now allocate the childen, making sure, when resizing not to
1194        * overlap the windows
1195        */
1196       gtk_widget_get_allocation (priv->child1, &priv_child1_allocation);
1197       if (gtk_widget_get_mapped (widget) &&
1198           ((priv->orientation == GTK_ORIENTATION_HORIZONTAL &&
1199             priv_child1_allocation.width < child1_allocation.width) ||
1200
1201            (priv->orientation == GTK_ORIENTATION_VERTICAL &&
1202             priv_child1_allocation.height < child1_allocation.height)))
1203         {
1204           gtk_paned_child_allocate (priv->child2,
1205                                     priv->child2_window,
1206                                     &window2_allocation,
1207                                     &child2_allocation);
1208           gtk_paned_child_allocate (priv->child1,
1209                                     priv->child1_window,
1210                                     &window1_allocation,
1211                                     &child1_allocation);
1212         }
1213       else
1214         {
1215           gtk_paned_child_allocate (priv->child1,
1216                                     priv->child1_window,
1217                                     &window1_allocation,
1218                                     &child1_allocation);
1219           gtk_paned_child_allocate (priv->child2,
1220                                     priv->child2_window,
1221                                     &window2_allocation,
1222                                     &child2_allocation);
1223         }
1224     }
1225   else
1226     {
1227       GtkAllocation window_allocation, child_allocation;
1228
1229       if (gtk_widget_get_realized (widget))
1230         gdk_window_hide (priv->handle);
1231
1232       window_allocation.x = allocation->x;
1233       window_allocation.y = allocation->y;
1234       window_allocation.width = allocation->width;
1235       window_allocation.height = allocation->height;
1236       child_allocation.x = child_allocation.y = 0;
1237       child_allocation.width = allocation->width;
1238       child_allocation.height = allocation->height;
1239
1240       if (priv->child1 && gtk_widget_get_visible (priv->child1))
1241         {
1242           gtk_paned_set_child_visible (paned, 0, TRUE);
1243           if (priv->child2)
1244             gtk_paned_set_child_visible (paned, 1, FALSE);
1245
1246           gtk_paned_child_allocate (priv->child1,
1247                                     priv->child1_window,
1248                                     &window_allocation,
1249                                     &child_allocation);
1250         }
1251       else if (priv->child2 && gtk_widget_get_visible (priv->child2))
1252         {
1253           gtk_paned_set_child_visible (paned, 1, TRUE);
1254           if (priv->child1)
1255             gtk_paned_set_child_visible (paned, 0, FALSE);
1256
1257           gtk_paned_child_allocate (priv->child2,
1258                                     priv->child2_window,
1259                                     &window_allocation,
1260                                     &child_allocation);
1261         }
1262       else
1263         {
1264           if (priv->child1)
1265             gtk_paned_set_child_visible (paned, 0, FALSE);
1266           if (priv->child2)
1267             gtk_paned_set_child_visible (paned, 1, FALSE);
1268         }
1269     }
1270 }
1271
1272 static GdkWindow *
1273 gtk_paned_create_child_window (GtkPaned  *paned,
1274                                GtkWidget *child) /* may be NULL */
1275 {
1276   GtkWidget *widget = GTK_WIDGET (paned);
1277   GtkPanedPrivate *priv = paned->priv;
1278   GdkWindow *window;
1279   GdkWindowAttr attributes;
1280   gint attributes_mask;
1281
1282   attributes.window_type = GDK_WINDOW_CHILD;
1283   attributes.wclass = GDK_INPUT_OUTPUT;
1284   attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
1285   if (child)
1286     {
1287       GtkAllocation allocation;
1288       int handle_size;
1289
1290       gtk_widget_style_get (widget, "handle-size", &handle_size, NULL);
1291
1292       gtk_widget_get_allocation (widget, &allocation);
1293       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL &&
1294           child == priv->child2)
1295         attributes.x = priv->handle_pos.x + handle_size;
1296       else
1297         attributes.x = allocation.x;
1298       if (priv->orientation == GTK_ORIENTATION_VERTICAL &&
1299           child == priv->child2)
1300         attributes.y = priv->handle_pos.y + handle_size;
1301       else
1302         attributes.y = allocation.y;
1303
1304       gtk_widget_get_allocation (child, &allocation);
1305       attributes.width = allocation.width;
1306       attributes.height = allocation.height;
1307       attributes_mask = GDK_WA_X | GDK_WA_Y;
1308     }
1309   else
1310     {
1311       attributes.width = 1;
1312       attributes.height = 1;
1313       attributes_mask = 0;
1314     }
1315
1316   window = gdk_window_new (gtk_widget_get_window (widget),
1317                            &attributes, attributes_mask);
1318   gdk_window_set_user_data (window, paned);
1319   gtk_style_context_set_background (gtk_widget_get_style_context (widget), window);
1320
1321   if (child)
1322     gtk_widget_set_parent_window (child, window);
1323
1324   return window;
1325 }
1326
1327 static void
1328 gtk_paned_realize (GtkWidget *widget)
1329 {
1330   GtkPaned *paned = GTK_PANED (widget);
1331   GtkPanedPrivate *priv = paned->priv;
1332   GdkWindow *window;
1333   GdkWindowAttr attributes;
1334   gint attributes_mask;
1335
1336   gtk_widget_set_realized (widget, TRUE);
1337
1338   window = gtk_widget_get_parent_window (widget);
1339   gtk_widget_set_window (widget, window);
1340   g_object_ref (window);
1341
1342   attributes.window_type = GDK_WINDOW_CHILD;
1343   attributes.wclass = GDK_INPUT_ONLY;
1344   attributes.x = priv->handle_pos.x;
1345   attributes.y = priv->handle_pos.y;
1346   attributes.width = priv->handle_pos.width;
1347   attributes.height = priv->handle_pos.height;
1348   attributes.event_mask = gtk_widget_get_events (widget);
1349   attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
1350                             GDK_BUTTON_RELEASE_MASK |
1351                             GDK_ENTER_NOTIFY_MASK |
1352                             GDK_LEAVE_NOTIFY_MASK |
1353                             GDK_POINTER_MOTION_MASK |
1354                             GDK_POINTER_MOTION_HINT_MASK);
1355   attributes_mask = GDK_WA_X | GDK_WA_Y;
1356   if (gtk_widget_is_sensitive (widget))
1357     {
1358       attributes.cursor = gdk_cursor_new_for_display (gtk_widget_get_display (widget),
1359                                                       priv->cursor_type);
1360       attributes_mask |= GDK_WA_CURSOR;
1361     }
1362
1363   priv->handle = gdk_window_new (window,
1364                                  &attributes, attributes_mask);
1365   gdk_window_set_user_data (priv->handle, paned);
1366   if (attributes_mask & GDK_WA_CURSOR)
1367     g_object_unref (attributes.cursor);
1368
1369   priv->child1_window = gtk_paned_create_child_window (paned, priv->child1);
1370   priv->child2_window = gtk_paned_create_child_window (paned, priv->child2);
1371 }
1372
1373 static void
1374 gtk_paned_unrealize (GtkWidget *widget)
1375 {
1376   GtkPaned *paned = GTK_PANED (widget);
1377   GtkPanedPrivate *priv = paned->priv;
1378
1379   if (priv->child2)
1380     gtk_widget_set_parent_window (priv->child2, NULL);
1381   gdk_window_set_user_data (priv->child2_window, NULL);
1382   gdk_window_destroy (priv->child2_window);
1383   priv->child2_window = NULL;
1384
1385   if (priv->child1)
1386     gtk_widget_set_parent_window (priv->child1, NULL);
1387   gdk_window_set_user_data (priv->child1_window, NULL);
1388   gdk_window_destroy (priv->child1_window);
1389   priv->child1_window = NULL;
1390
1391   if (priv->handle)
1392     {
1393       gdk_window_set_user_data (priv->handle, NULL);
1394       gdk_window_destroy (priv->handle);
1395       priv->handle = NULL;
1396     }
1397
1398   gtk_paned_set_last_child1_focus (paned, NULL);
1399   gtk_paned_set_last_child2_focus (paned, NULL);
1400   gtk_paned_set_saved_focus (paned, NULL);
1401   gtk_paned_set_first_paned (paned, NULL);
1402
1403   GTK_WIDGET_CLASS (gtk_paned_parent_class)->unrealize (widget);
1404 }
1405
1406 static void
1407 gtk_paned_map (GtkWidget *widget)
1408 {
1409   GtkPaned *paned = GTK_PANED (widget);
1410   GtkPanedPrivate *priv = paned->priv;
1411
1412   if (priv->child1 && gtk_widget_get_visible (priv->child1) &&
1413       priv->child2 && gtk_widget_get_visible (priv->child2))
1414     gdk_window_show (priv->handle);
1415
1416   if (priv->child1 && gtk_widget_get_visible (priv->child1) && gtk_widget_get_child_visible (priv->child1))
1417     gdk_window_show (priv->child1_window);
1418   if (priv->child2 && gtk_widget_get_visible (priv->child2) && gtk_widget_get_child_visible (priv->child2))
1419     gdk_window_show (priv->child2_window);
1420
1421   GTK_WIDGET_CLASS (gtk_paned_parent_class)->map (widget);
1422 }
1423
1424 static void
1425 gtk_paned_unmap (GtkWidget *widget)
1426 {
1427   GtkPaned *paned = GTK_PANED (widget);
1428   GtkPanedPrivate *priv = paned->priv;
1429
1430   gdk_window_hide (priv->handle);
1431
1432   if (gdk_window_is_visible (priv->child1_window))
1433     gdk_window_hide (priv->child1_window);
1434   if (gdk_window_is_visible (priv->child2_window))
1435     gdk_window_hide (priv->child2_window);
1436
1437   GTK_WIDGET_CLASS (gtk_paned_parent_class)->unmap (widget);
1438 }
1439
1440 static gboolean
1441 gtk_paned_draw (GtkWidget *widget,
1442                 cairo_t   *cr)
1443 {
1444   GtkPaned *paned = GTK_PANED (widget);
1445   GtkPanedPrivate *priv = paned->priv;
1446
1447   if (gtk_cairo_should_draw_window (cr, priv->child1_window))
1448     {
1449       cairo_save (cr);
1450       gtk_cairo_transform_to_window (cr, widget, priv->child1_window);
1451       gtk_render_background (gtk_widget_get_style_context (widget),
1452                              cr,
1453                              0, 0,
1454                              gdk_window_get_width (priv->child1_window),
1455                              gdk_window_get_height (priv->child1_window));
1456       cairo_restore (cr);
1457     }
1458
1459   if (gtk_cairo_should_draw_window (cr, priv->child2_window))
1460     {
1461       cairo_save (cr);
1462       gtk_cairo_transform_to_window (cr, widget, priv->child2_window);
1463       gtk_render_background (gtk_widget_get_style_context (widget),
1464                              cr,
1465                              0, 0,
1466                              gdk_window_get_width (priv->child2_window),
1467                              gdk_window_get_height (priv->child2_window));
1468       cairo_restore (cr);
1469     }
1470
1471   if (gtk_cairo_should_draw_window (cr, gtk_widget_get_window (widget)) &&
1472       priv->child1 && gtk_widget_get_visible (priv->child1) &&
1473       priv->child2 && gtk_widget_get_visible (priv->child2))
1474     {
1475       GtkStyleContext *context;
1476       GtkStateFlags state;
1477       GtkAllocation allocation;
1478
1479       gtk_widget_get_allocation (widget, &allocation);
1480       context = gtk_widget_get_style_context (widget);
1481       state = gtk_widget_get_state_flags (widget);
1482
1483       if (gtk_widget_is_focus (widget))
1484         state |= GTK_STATE_FLAG_SELECTED;
1485       if (priv->handle_prelit)
1486         state |= GTK_STATE_FLAG_PRELIGHT;
1487
1488       gtk_style_context_save (context);
1489       gtk_style_context_set_state (context, state);
1490       gtk_style_context_add_class (context, GTK_STYLE_CLASS_PANE_SEPARATOR);
1491       gtk_render_handle (context, cr,
1492                          priv->handle_pos.x - allocation.x,
1493                          priv->handle_pos.y - allocation.y,
1494                          priv->handle_pos.width,
1495                          priv->handle_pos.height);
1496
1497       gtk_style_context_restore (context);
1498     }
1499
1500   /* Chain up to draw children */
1501   GTK_WIDGET_CLASS (gtk_paned_parent_class)->draw (widget, cr);
1502
1503   return FALSE;
1504 }
1505
1506 static gboolean
1507 is_rtl (GtkPaned *paned)
1508 {
1509   GtkPanedPrivate *priv = paned->priv;
1510
1511   if (priv->orientation == GTK_ORIENTATION_HORIZONTAL &&
1512       gtk_widget_get_direction (GTK_WIDGET (paned)) == GTK_TEXT_DIR_RTL)
1513     {
1514       return TRUE;
1515     }
1516
1517   return FALSE;
1518 }
1519
1520 static void
1521 update_drag (GtkPaned *paned)
1522 {
1523   GtkPanedPrivate *priv = paned->priv;
1524   GtkAllocation allocation;
1525   GtkWidget *widget = GTK_WIDGET (paned);
1526   gint pos;
1527   gint handle_size;
1528   gint size;
1529
1530   if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
1531     gtk_widget_get_pointer (widget, &pos, NULL);
1532   else
1533     gtk_widget_get_pointer (widget, NULL, &pos);
1534
1535   pos -= priv->drag_pos;
1536
1537   if (is_rtl (paned))
1538     {
1539       gtk_widget_style_get (widget,
1540                             "handle-size", &handle_size,
1541                             NULL);
1542
1543       gtk_widget_get_allocation (widget, &allocation);
1544       size = allocation.width - pos - handle_size;
1545     }
1546   else
1547     {
1548       size = pos;
1549     }
1550
1551   size = CLAMP (size, priv->min_position, priv->max_position);
1552
1553   if (size != priv->child1_size)
1554     gtk_paned_set_position (paned, size);
1555 }
1556
1557 static gboolean
1558 gtk_paned_enter (GtkWidget        *widget,
1559                  GdkEventCrossing *event)
1560 {
1561   GtkPaned *paned = GTK_PANED (widget);
1562   GtkPanedPrivate *priv = paned->priv;
1563
1564   if (priv->in_drag)
1565     update_drag (paned);
1566   else
1567     {
1568       priv->handle_prelit = TRUE;
1569       gtk_widget_queue_draw_area (widget,
1570                                   priv->handle_pos.x,
1571                                   priv->handle_pos.y,
1572                                   priv->handle_pos.width,
1573                                   priv->handle_pos.height);
1574     }
1575
1576   return TRUE;
1577 }
1578
1579 static gboolean
1580 gtk_paned_leave (GtkWidget        *widget,
1581                  GdkEventCrossing *event)
1582 {
1583   GtkPaned *paned = GTK_PANED (widget);
1584   GtkPanedPrivate *priv = paned->priv;
1585
1586   if (priv->in_drag)
1587     update_drag (paned);
1588   else
1589     {
1590       priv->handle_prelit = FALSE;
1591       gtk_widget_queue_draw_area (widget,
1592                                   priv->handle_pos.x,
1593                                   priv->handle_pos.y,
1594                                   priv->handle_pos.width,
1595                                   priv->handle_pos.height);
1596     }
1597
1598   return TRUE;
1599 }
1600
1601 static gboolean
1602 gtk_paned_focus (GtkWidget        *widget,
1603                  GtkDirectionType  direction)
1604
1605 {
1606   gboolean retval;
1607
1608   /* This is a hack, but how can this be done without
1609    * excessive cut-and-paste from gtkcontainer.c?
1610    */
1611
1612   gtk_widget_set_can_focus (widget, FALSE);
1613   retval = GTK_WIDGET_CLASS (gtk_paned_parent_class)->focus (widget, direction);
1614   gtk_widget_set_can_focus (widget, TRUE);
1615
1616   return retval;
1617 }
1618
1619 static gboolean
1620 gtk_paned_button_press (GtkWidget      *widget,
1621                         GdkEventButton *event)
1622 {
1623   GtkPaned *paned = GTK_PANED (widget);
1624   GtkPanedPrivate *priv = paned->priv;
1625
1626   if (!priv->in_drag &&
1627       (event->window == priv->handle) && (event->button == 1))
1628     {
1629       /* We need a server grab here, not gtk_grab_add(), since
1630        * we don't want to pass events on to the widget's children */
1631       if (gdk_device_grab (event->device,
1632                            priv->handle,
1633                            GDK_OWNERSHIP_WINDOW, FALSE,
1634                            GDK_POINTER_MOTION_HINT_MASK
1635                            | GDK_BUTTON1_MOTION_MASK
1636                            | GDK_BUTTON_RELEASE_MASK
1637                            | GDK_ENTER_NOTIFY_MASK
1638                            | GDK_LEAVE_NOTIFY_MASK,
1639                            NULL, event->time) != GDK_GRAB_SUCCESS)
1640         return FALSE;
1641
1642       priv->in_drag = TRUE;
1643       priv->grab_time = event->time;
1644       priv->grab_device = event->device;
1645
1646       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
1647         priv->drag_pos = event->x;
1648       else
1649         priv->drag_pos = event->y;
1650
1651       return TRUE;
1652     }
1653
1654   return FALSE;
1655 }
1656
1657 static gboolean
1658 gtk_paned_grab_broken (GtkWidget          *widget,
1659                        GdkEventGrabBroken *event)
1660 {
1661   GtkPaned *paned = GTK_PANED (widget);
1662   GtkPanedPrivate *priv = paned->priv;
1663
1664   priv->in_drag = FALSE;
1665   priv->drag_pos = -1;
1666   priv->position_set = TRUE;
1667
1668   return TRUE;
1669 }
1670
1671 static void
1672 stop_drag (GtkPaned *paned)
1673 {
1674   GtkPanedPrivate *priv = paned->priv;
1675
1676   priv->in_drag = FALSE;
1677   priv->drag_pos = -1;
1678   priv->position_set = TRUE;
1679
1680   gdk_device_ungrab (priv->grab_device,
1681                      priv->grab_time);
1682   priv->grab_device = NULL;
1683 }
1684
1685 static void
1686 gtk_paned_grab_notify (GtkWidget *widget,
1687                        gboolean   was_grabbed)
1688 {
1689   GtkPaned *paned = GTK_PANED (widget);
1690   GtkPanedPrivate *priv = paned->priv;
1691   GdkDevice *grab_device;
1692
1693   grab_device = priv->grab_device;
1694
1695   if (priv->in_drag && grab_device &&
1696       gtk_widget_device_is_shadowed (widget, grab_device))
1697     stop_drag (paned);
1698 }
1699
1700 static void
1701 gtk_paned_state_flags_changed (GtkWidget     *widget,
1702                                GtkStateFlags  previous_state)
1703 {
1704   GtkPaned *paned = GTK_PANED (widget);
1705   GtkPanedPrivate *priv = paned->priv;
1706   GdkCursor *cursor;
1707
1708   if (gtk_widget_get_realized (widget))
1709     {
1710       if (gtk_widget_is_sensitive (widget))
1711         cursor = gdk_cursor_new_for_display (gtk_widget_get_display (widget),
1712                                              priv->cursor_type);
1713       else
1714         cursor = NULL;
1715
1716       gdk_window_set_cursor (priv->handle, cursor);
1717
1718       if (cursor)
1719         g_object_unref (cursor);
1720     }
1721 }
1722
1723 static gboolean
1724 gtk_paned_button_release (GtkWidget      *widget,
1725                           GdkEventButton *event)
1726 {
1727   GtkPaned *paned = GTK_PANED (widget);
1728   GtkPanedPrivate *priv = paned->priv;
1729
1730   if (priv->in_drag && (event->button == 1))
1731     {
1732       stop_drag (paned);
1733
1734       return TRUE;
1735     }
1736
1737   return FALSE;
1738 }
1739
1740 static gboolean
1741 gtk_paned_motion (GtkWidget      *widget,
1742                   GdkEventMotion *event)
1743 {
1744   GtkPaned *paned = GTK_PANED (widget);
1745   GtkPanedPrivate *priv = paned->priv;
1746
1747   if (priv->in_drag)
1748     {
1749       update_drag (paned);
1750       return TRUE;
1751     }
1752
1753   return FALSE;
1754 }
1755
1756 /**
1757  * gtk_paned_new:
1758  * @orientation: the paned's orientation.
1759  *
1760  * Creates a new #GtkPaned widget.
1761  *
1762  * Return value: a new #GtkPaned.
1763  *
1764  * Since: 3.0
1765  **/
1766 GtkWidget *
1767 gtk_paned_new (GtkOrientation orientation)
1768 {
1769   return g_object_new (GTK_TYPE_PANED,
1770                        "orientation", orientation,
1771                        NULL);
1772 }
1773
1774 /**
1775  * gtk_paned_add1:
1776  * @paned: a paned widget
1777  * @child: the child to add
1778  *
1779  * Adds a child to the top or left pane with default parameters. This is
1780  * equivalent to
1781  * <literal>gtk_paned_pack1 (paned, child, FALSE, TRUE)</literal>.
1782  */
1783 void
1784 gtk_paned_add1 (GtkPaned  *paned,
1785                 GtkWidget *widget)
1786 {
1787   gtk_paned_pack1 (paned, widget, FALSE, TRUE);
1788 }
1789
1790 /**
1791  * gtk_paned_add2:
1792  * @paned: a paned widget
1793  * @child: the child to add
1794  *
1795  * Adds a child to the bottom or right pane with default parameters. This
1796  * is equivalent to
1797  * <literal>gtk_paned_pack2 (paned, child, TRUE, TRUE)</literal>.
1798  */
1799 void
1800 gtk_paned_add2 (GtkPaned  *paned,
1801                 GtkWidget *widget)
1802 {
1803   gtk_paned_pack2 (paned, widget, TRUE, TRUE);
1804 }
1805
1806 /**
1807  * gtk_paned_pack1:
1808  * @paned: a paned widget
1809  * @child: the child to add
1810  * @resize: should this child expand when the paned widget is resized.
1811  * @shrink: can this child be made smaller than its requisition.
1812  *
1813  * Adds a child to the top or left pane.
1814  */
1815 void
1816 gtk_paned_pack1 (GtkPaned  *paned,
1817                  GtkWidget *child,
1818                  gboolean   resize,
1819                  gboolean   shrink)
1820 {
1821   GtkPanedPrivate *priv;
1822
1823   g_return_if_fail (GTK_IS_PANED (paned));
1824   g_return_if_fail (GTK_IS_WIDGET (child));
1825
1826   priv = paned->priv;
1827
1828   if (!priv->child1)
1829     {
1830       priv->child1 = child;
1831       priv->child1_resize = resize;
1832       priv->child1_shrink = shrink;
1833
1834       gtk_widget_set_parent_window (child, priv->child1_window);
1835       gtk_widget_set_parent (child, GTK_WIDGET (paned));
1836     }
1837 }
1838
1839 /**
1840  * gtk_paned_pack2:
1841  * @paned: a paned widget
1842  * @child: the child to add
1843  * @resize: should this child expand when the paned widget is resized.
1844  * @shrink: can this child be made smaller than its requisition.
1845  *
1846  * Adds a child to the bottom or right pane.
1847  */
1848 void
1849 gtk_paned_pack2 (GtkPaned  *paned,
1850                  GtkWidget *child,
1851                  gboolean   resize,
1852                  gboolean   shrink)
1853 {
1854   GtkPanedPrivate *priv;
1855
1856   g_return_if_fail (GTK_IS_PANED (paned));
1857   g_return_if_fail (GTK_IS_WIDGET (child));
1858
1859   priv = paned->priv;
1860
1861   if (!priv->child2)
1862     {
1863       priv->child2 = child;
1864       priv->child2_resize = resize;
1865       priv->child2_shrink = shrink;
1866
1867       gtk_widget_set_parent_window (child, priv->child2_window);
1868       gtk_widget_set_parent (child, GTK_WIDGET (paned));
1869     }
1870 }
1871
1872
1873 static void
1874 gtk_paned_add (GtkContainer *container,
1875                GtkWidget    *widget)
1876 {
1877   GtkPanedPrivate *priv;
1878   GtkPaned *paned;
1879
1880   g_return_if_fail (GTK_IS_PANED (container));
1881
1882   paned = GTK_PANED (container);
1883   priv = paned->priv;
1884
1885   if (!priv->child1)
1886     gtk_paned_add1 (paned, widget);
1887   else if (!priv->child2)
1888     gtk_paned_add2 (paned, widget);
1889   else
1890     g_warning ("GtkPaned cannot have more than 2 children\n");
1891 }
1892
1893 static void
1894 gtk_paned_remove (GtkContainer *container,
1895                   GtkWidget    *widget)
1896 {
1897   GtkPaned *paned = GTK_PANED (container);
1898   GtkPanedPrivate *priv = paned->priv;
1899   gboolean was_visible;
1900
1901   was_visible = gtk_widget_get_visible (widget);
1902
1903   if (priv->child1 == widget)
1904     {
1905       if (priv->child1_window && gdk_window_is_visible (priv->child1_window))
1906         gdk_window_hide (priv->child1_window);
1907
1908       gtk_widget_unparent (widget);
1909
1910       priv->child1 = NULL;
1911
1912       if (was_visible && gtk_widget_get_visible (GTK_WIDGET (container)))
1913         gtk_widget_queue_resize_no_redraw (GTK_WIDGET (container));
1914     }
1915   else if (priv->child2 == widget)
1916     {
1917       if (priv->child2_window && gdk_window_is_visible (priv->child2_window))
1918         gdk_window_hide (priv->child2_window);
1919
1920       gtk_widget_unparent (widget);
1921
1922       priv->child2 = NULL;
1923
1924       if (was_visible && gtk_widget_get_visible (GTK_WIDGET (container)))
1925         gtk_widget_queue_resize_no_redraw (GTK_WIDGET (container));
1926     }
1927 }
1928
1929 static void
1930 gtk_paned_forall (GtkContainer *container,
1931                   gboolean      include_internals,
1932                   GtkCallback   callback,
1933                   gpointer      callback_data)
1934 {
1935   GtkPanedPrivate *priv;
1936   GtkPaned *paned;
1937
1938   g_return_if_fail (callback != NULL);
1939
1940   paned = GTK_PANED (container);
1941   priv = paned->priv;
1942
1943   if (priv->child1)
1944     (*callback) (priv->child1, callback_data);
1945   if (priv->child2)
1946     (*callback) (priv->child2, callback_data);
1947 }
1948
1949 /**
1950  * gtk_paned_get_position:
1951  * @paned: a #GtkPaned widget
1952  *
1953  * Obtains the position of the divider between the two panes.
1954  *
1955  * Return value: position of the divider
1956  **/
1957 gint
1958 gtk_paned_get_position (GtkPaned  *paned)
1959 {
1960   g_return_val_if_fail (GTK_IS_PANED (paned), 0);
1961
1962   return paned->priv->child1_size;
1963 }
1964
1965 /**
1966  * gtk_paned_set_position:
1967  * @paned: a #GtkPaned widget
1968  * @position: pixel position of divider, a negative value means that the position
1969  *            is unset.
1970  *
1971  * Sets the position of the divider between the two panes.
1972  **/
1973 void
1974 gtk_paned_set_position (GtkPaned *paned,
1975                         gint      position)
1976 {
1977   GtkPanedPrivate *priv;
1978   GObject *object;
1979
1980   g_return_if_fail (GTK_IS_PANED (paned));
1981
1982   priv = paned->priv;
1983
1984   if (priv->child1_size == position)
1985     return;
1986
1987   object = G_OBJECT (paned);
1988
1989   if (position >= 0)
1990     {
1991       /* We don't clamp here - the assumption is that
1992        * if the total allocation changes at the same time
1993        * as the position, the position set is with reference
1994        * to the new total size. If only the position changes,
1995        * then clamping will occur in gtk_paned_calc_position()
1996        */
1997
1998       priv->child1_size = position;
1999       priv->position_set = TRUE;
2000     }
2001   else
2002     {
2003       priv->position_set = FALSE;
2004     }
2005
2006   g_object_freeze_notify (object);
2007   g_object_notify (object, "position");
2008   g_object_notify (object, "position-set");
2009   g_object_thaw_notify (object);
2010
2011   gtk_widget_queue_resize_no_redraw (GTK_WIDGET (paned));
2012
2013 #ifdef G_OS_WIN32
2014   /* Hacky work-around for bug #144269 */
2015   if (priv->child2 != NULL)
2016     {
2017       gtk_widget_queue_draw (priv->child2);
2018     }
2019 #endif
2020 }
2021
2022 /**
2023  * gtk_paned_get_child1:
2024  * @paned: a #GtkPaned widget
2025  *
2026  * Obtains the first child of the paned widget.
2027  *
2028  * Return value: (transfer none): first child, or %NULL if it is not set.
2029  *
2030  * Since: 2.4
2031  **/
2032 GtkWidget *
2033 gtk_paned_get_child1 (GtkPaned *paned)
2034 {
2035   g_return_val_if_fail (GTK_IS_PANED (paned), NULL);
2036
2037   return paned->priv->child1;
2038 }
2039
2040 /**
2041  * gtk_paned_get_child2:
2042  * @paned: a #GtkPaned widget
2043  *
2044  * Obtains the second child of the paned widget.
2045  *
2046  * Return value: (transfer none): second child, or %NULL if it is not set.
2047  *
2048  * Since: 2.4
2049  **/
2050 GtkWidget *
2051 gtk_paned_get_child2 (GtkPaned *paned)
2052 {
2053   g_return_val_if_fail (GTK_IS_PANED (paned), NULL);
2054
2055   return paned->priv->child2;
2056 }
2057
2058 static void
2059 gtk_paned_calc_position (GtkPaned *paned,
2060                          gint      allocation,
2061                          gint      child1_req,
2062                          gint      child2_req)
2063 {
2064   GtkPanedPrivate *priv = paned->priv;
2065   gint old_position;
2066   gint old_min_position;
2067   gint old_max_position;
2068
2069   old_position = priv->child1_size;
2070   old_min_position = priv->min_position;
2071   old_max_position = priv->max_position;
2072
2073   priv->min_position = priv->child1_shrink ? 0 : child1_req;
2074
2075   priv->max_position = allocation;
2076   if (!priv->child2_shrink)
2077     priv->max_position = MAX (1, priv->max_position - child2_req);
2078   priv->max_position = MAX (priv->min_position, priv->max_position);
2079
2080   if (!priv->position_set)
2081     {
2082       if (priv->child1_resize && !priv->child2_resize)
2083         priv->child1_size = MAX (0, allocation - child2_req);
2084       else if (!priv->child1_resize && priv->child2_resize)
2085         priv->child1_size = child1_req;
2086       else if (child1_req + child2_req != 0)
2087         priv->child1_size = allocation * ((gdouble)child1_req / (child1_req + child2_req)) + 0.5;
2088       else
2089         priv->child1_size = allocation * 0.5 + 0.5;
2090     }
2091   else
2092     {
2093       /* If the position was set before the initial allocation.
2094        * (priv->last_allocation <= 0) just clamp it and leave it.
2095        */
2096       if (priv->last_allocation > 0)
2097         {
2098           if (priv->child1_resize && !priv->child2_resize)
2099             priv->child1_size += allocation - priv->last_allocation;
2100           else if (!(!priv->child1_resize && priv->child2_resize))
2101             priv->child1_size = allocation * ((gdouble) priv->child1_size / (priv->last_allocation)) + 0.5;
2102         }
2103     }
2104
2105   priv->child1_size = CLAMP (priv->child1_size,
2106                               priv->min_position,
2107                               priv->max_position);
2108
2109   if (priv->child1)
2110     gtk_paned_set_child_visible (paned, 0, priv->child1_size != 0);
2111
2112   if (priv->child2)
2113     gtk_paned_set_child_visible (paned, 1, priv->child1_size != allocation);
2114
2115   g_object_freeze_notify (G_OBJECT (paned));
2116   if (priv->child1_size != old_position)
2117     g_object_notify (G_OBJECT (paned), "position");
2118   if (priv->min_position != old_min_position)
2119     g_object_notify (G_OBJECT (paned), "min-position");
2120   if (priv->max_position != old_max_position)
2121     g_object_notify (G_OBJECT (paned), "max-position");
2122   g_object_thaw_notify (G_OBJECT (paned));
2123
2124   priv->last_allocation = allocation;
2125 }
2126
2127 static void
2128 gtk_paned_set_saved_focus (GtkPaned *paned, GtkWidget *widget)
2129 {
2130   GtkPanedPrivate *priv = paned->priv;
2131
2132   if (priv->saved_focus)
2133     g_object_remove_weak_pointer (G_OBJECT (priv->saved_focus),
2134                                   (gpointer *)&(priv->saved_focus));
2135
2136   priv->saved_focus = widget;
2137
2138   if (priv->saved_focus)
2139     g_object_add_weak_pointer (G_OBJECT (priv->saved_focus),
2140                                (gpointer *)&(priv->saved_focus));
2141 }
2142
2143 static void
2144 gtk_paned_set_first_paned (GtkPaned *paned, GtkPaned *first_paned)
2145 {
2146   GtkPanedPrivate *priv = paned->priv;
2147
2148   if (priv->first_paned)
2149     g_object_remove_weak_pointer (G_OBJECT (priv->first_paned),
2150                                   (gpointer *)&(priv->first_paned));
2151
2152   priv->first_paned = first_paned;
2153
2154   if (priv->first_paned)
2155     g_object_add_weak_pointer (G_OBJECT (priv->first_paned),
2156                                (gpointer *)&(priv->first_paned));
2157 }
2158
2159 static void
2160 gtk_paned_set_last_child1_focus (GtkPaned *paned, GtkWidget *widget)
2161 {
2162   GtkPanedPrivate *priv = paned->priv;
2163
2164   if (priv->last_child1_focus)
2165     g_object_remove_weak_pointer (G_OBJECT (priv->last_child1_focus),
2166                                   (gpointer *)&(priv->last_child1_focus));
2167
2168   priv->last_child1_focus = widget;
2169
2170   if (priv->last_child1_focus)
2171     g_object_add_weak_pointer (G_OBJECT (priv->last_child1_focus),
2172                                (gpointer *)&(priv->last_child1_focus));
2173 }
2174
2175 static void
2176 gtk_paned_set_last_child2_focus (GtkPaned *paned, GtkWidget *widget)
2177 {
2178   GtkPanedPrivate *priv = paned->priv;
2179
2180   if (priv->last_child2_focus)
2181     g_object_remove_weak_pointer (G_OBJECT (priv->last_child2_focus),
2182                                   (gpointer *)&(priv->last_child2_focus));
2183
2184   priv->last_child2_focus = widget;
2185
2186   if (priv->last_child2_focus)
2187     g_object_add_weak_pointer (G_OBJECT (priv->last_child2_focus),
2188                                (gpointer *)&(priv->last_child2_focus));
2189 }
2190
2191 static GtkWidget *
2192 paned_get_focus_widget (GtkPaned *paned)
2193 {
2194   GtkWidget *toplevel;
2195
2196   toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
2197   if (gtk_widget_is_toplevel (toplevel))
2198     return gtk_window_get_focus (GTK_WINDOW (toplevel));
2199
2200   return NULL;
2201 }
2202
2203 static void
2204 gtk_paned_set_focus_child (GtkContainer *container,
2205                            GtkWidget    *focus_child)
2206 {
2207   GtkPaned *paned;
2208   GtkPanedPrivate *priv;
2209   GtkWidget *container_focus_child;
2210
2211   g_return_if_fail (GTK_IS_PANED (container));
2212
2213   paned = GTK_PANED (container);
2214   priv = paned->priv;
2215
2216   if (focus_child == NULL)
2217     {
2218       GtkWidget *last_focus;
2219       GtkWidget *w;
2220
2221       last_focus = paned_get_focus_widget (paned);
2222
2223       if (last_focus)
2224         {
2225           /* If there is one or more paned widgets between us and the
2226            * focus widget, we want the topmost of those as last_focus
2227            */
2228           for (w = last_focus; w != GTK_WIDGET (paned); w = gtk_widget_get_parent (w))
2229             if (GTK_IS_PANED (w))
2230               last_focus = w;
2231
2232           container_focus_child = gtk_container_get_focus_child (container);
2233           if (container_focus_child == priv->child1)
2234             gtk_paned_set_last_child1_focus (paned, last_focus);
2235           else if (container_focus_child == priv->child2)
2236             gtk_paned_set_last_child2_focus (paned, last_focus);
2237         }
2238     }
2239
2240   if (GTK_CONTAINER_CLASS (gtk_paned_parent_class)->set_focus_child)
2241     GTK_CONTAINER_CLASS (gtk_paned_parent_class)->set_focus_child (container, focus_child);
2242 }
2243
2244 static void
2245 gtk_paned_get_cycle_chain (GtkPaned          *paned,
2246                            GtkDirectionType   direction,
2247                            GList            **widgets)
2248 {
2249   GtkPanedPrivate *priv = paned->priv;
2250   GtkContainer *container = GTK_CONTAINER (paned);
2251   GtkWidget *ancestor = NULL;
2252   GtkWidget *focus_child;
2253   GtkWidget *parent;
2254   GtkWidget *widget = GTK_WIDGET (paned);
2255   GList *temp_list = NULL;
2256   GList *list;
2257
2258   if (priv->in_recursion)
2259     return;
2260
2261   g_assert (widgets != NULL);
2262
2263   if (priv->last_child1_focus &&
2264       !gtk_widget_is_ancestor (priv->last_child1_focus, widget))
2265     {
2266       gtk_paned_set_last_child1_focus (paned, NULL);
2267     }
2268
2269   if (priv->last_child2_focus &&
2270       !gtk_widget_is_ancestor (priv->last_child2_focus, widget))
2271     {
2272       gtk_paned_set_last_child2_focus (paned, NULL);
2273     }
2274
2275   parent = gtk_widget_get_parent (widget);
2276   if (parent)
2277     ancestor = gtk_widget_get_ancestor (parent, GTK_TYPE_PANED);
2278
2279   /* The idea here is that temp_list is a list of widgets we want to cycle
2280    * to. The list is prioritized so that the first element is our first
2281    * choice, the next our second, and so on.
2282    *
2283    * We can't just use g_list_reverse(), because we want to try
2284    * priv->last_child?_focus before priv->child?, both when we
2285    * are going forward and backward.
2286    */
2287   focus_child = gtk_container_get_focus_child (container);
2288   if (direction == GTK_DIR_TAB_FORWARD)
2289     {
2290       if (focus_child == priv->child1)
2291         {
2292           temp_list = g_list_append (temp_list, priv->last_child2_focus);
2293           temp_list = g_list_append (temp_list, priv->child2);
2294           temp_list = g_list_append (temp_list, ancestor);
2295         }
2296       else if (focus_child == priv->child2)
2297         {
2298           temp_list = g_list_append (temp_list, ancestor);
2299           temp_list = g_list_append (temp_list, priv->last_child1_focus);
2300           temp_list = g_list_append (temp_list, priv->child1);
2301         }
2302       else
2303         {
2304           temp_list = g_list_append (temp_list, priv->last_child1_focus);
2305           temp_list = g_list_append (temp_list, priv->child1);
2306           temp_list = g_list_append (temp_list, priv->last_child2_focus);
2307           temp_list = g_list_append (temp_list, priv->child2);
2308           temp_list = g_list_append (temp_list, ancestor);
2309         }
2310     }
2311   else
2312     {
2313       if (focus_child == priv->child1)
2314         {
2315           temp_list = g_list_append (temp_list, ancestor);
2316           temp_list = g_list_append (temp_list, priv->last_child2_focus);
2317           temp_list = g_list_append (temp_list, priv->child2);
2318         }
2319       else if (focus_child == priv->child2)
2320         {
2321           temp_list = g_list_append (temp_list, priv->last_child1_focus);
2322           temp_list = g_list_append (temp_list, priv->child1);
2323           temp_list = g_list_append (temp_list, ancestor);
2324         }
2325       else
2326         {
2327           temp_list = g_list_append (temp_list, priv->last_child2_focus);
2328           temp_list = g_list_append (temp_list, priv->child2);
2329           temp_list = g_list_append (temp_list, priv->last_child1_focus);
2330           temp_list = g_list_append (temp_list, priv->child1);
2331           temp_list = g_list_append (temp_list, ancestor);
2332         }
2333     }
2334
2335   /* Walk the list and expand all the paned widgets. */
2336   for (list = temp_list; list != NULL; list = list->next)
2337     {
2338       GtkWidget *widget = list->data;
2339
2340       if (widget)
2341         {
2342           if (GTK_IS_PANED (widget))
2343             {
2344               priv->in_recursion = TRUE;
2345               gtk_paned_get_cycle_chain (GTK_PANED (widget), direction, widgets);
2346               priv->in_recursion = FALSE;
2347             }
2348           else
2349             {
2350               *widgets = g_list_append (*widgets, widget);
2351             }
2352         }
2353     }
2354
2355   g_list_free (temp_list);
2356 }
2357
2358 static gboolean
2359 gtk_paned_cycle_child_focus (GtkPaned *paned,
2360                              gboolean  reversed)
2361 {
2362   GList *cycle_chain = NULL;
2363   GList *list;
2364
2365   GtkDirectionType direction = reversed? GTK_DIR_TAB_BACKWARD : GTK_DIR_TAB_FORWARD;
2366
2367   /* ignore f6 if the handle is focused */
2368   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
2369     return TRUE;
2370
2371   /* we can't just let the event propagate up the hierarchy,
2372    * because the paned will want to cycle focus _unless_ an
2373    * ancestor paned handles the event
2374    */
2375   gtk_paned_get_cycle_chain (paned, direction, &cycle_chain);
2376
2377   for (list = cycle_chain; list != NULL; list = list->next)
2378     if (gtk_widget_child_focus (GTK_WIDGET (list->data), direction))
2379       break;
2380
2381   g_list_free (cycle_chain);
2382
2383   return TRUE;
2384 }
2385
2386 static void
2387 get_child_panes (GtkWidget  *widget,
2388                  GList     **panes)
2389 {
2390   if (!widget || !gtk_widget_get_realized (widget))
2391     return;
2392
2393   if (GTK_IS_PANED (widget))
2394     {
2395       GtkPaned *paned = GTK_PANED (widget);
2396       GtkPanedPrivate *priv = paned->priv;
2397
2398       get_child_panes (priv->child1, panes);
2399       *panes = g_list_prepend (*panes, widget);
2400       get_child_panes (priv->child2, panes);
2401     }
2402   else if (GTK_IS_CONTAINER (widget))
2403     {
2404       gtk_container_forall (GTK_CONTAINER (widget),
2405                             (GtkCallback)get_child_panes, panes);
2406     }
2407 }
2408
2409 static GList *
2410 get_all_panes (GtkPaned *paned)
2411 {
2412   GtkPaned *topmost = NULL;
2413   GList *result = NULL;
2414   GtkWidget *w;
2415
2416   for (w = GTK_WIDGET (paned); w != NULL; w = gtk_widget_get_parent (w))
2417     {
2418       if (GTK_IS_PANED (w))
2419         topmost = GTK_PANED (w);
2420     }
2421
2422   g_assert (topmost);
2423
2424   get_child_panes (GTK_WIDGET (topmost), &result);
2425
2426   return g_list_reverse (result);
2427 }
2428
2429 static void
2430 gtk_paned_find_neighbours (GtkPaned  *paned,
2431                            GtkPaned **next,
2432                            GtkPaned **prev)
2433 {
2434   GList *all_panes;
2435   GList *this_link;
2436
2437   all_panes = get_all_panes (paned);
2438   g_assert (all_panes);
2439
2440   this_link = g_list_find (all_panes, paned);
2441
2442   g_assert (this_link);
2443
2444   if (this_link->next)
2445     *next = this_link->next->data;
2446   else
2447     *next = all_panes->data;
2448
2449   if (this_link->prev)
2450     *prev = this_link->prev->data;
2451   else
2452     *prev = g_list_last (all_panes)->data;
2453
2454   g_list_free (all_panes);
2455 }
2456
2457 static gboolean
2458 gtk_paned_move_handle (GtkPaned      *paned,
2459                        GtkScrollType  scroll)
2460 {
2461   GtkPanedPrivate *priv = paned->priv;
2462
2463   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
2464     {
2465       gint old_position;
2466       gint new_position;
2467       gint increment;
2468
2469       enum {
2470         SINGLE_STEP_SIZE = 1,
2471         PAGE_STEP_SIZE   = 75
2472       };
2473
2474       new_position = old_position = gtk_paned_get_position (paned);
2475       increment = 0;
2476
2477       switch (scroll)
2478         {
2479         case GTK_SCROLL_STEP_LEFT:
2480         case GTK_SCROLL_STEP_UP:
2481         case GTK_SCROLL_STEP_BACKWARD:
2482           increment = - SINGLE_STEP_SIZE;
2483           break;
2484
2485         case GTK_SCROLL_STEP_RIGHT:
2486         case GTK_SCROLL_STEP_DOWN:
2487         case GTK_SCROLL_STEP_FORWARD:
2488           increment = SINGLE_STEP_SIZE;
2489           break;
2490
2491         case GTK_SCROLL_PAGE_LEFT:
2492         case GTK_SCROLL_PAGE_UP:
2493         case GTK_SCROLL_PAGE_BACKWARD:
2494           increment = - PAGE_STEP_SIZE;
2495           break;
2496
2497         case GTK_SCROLL_PAGE_RIGHT:
2498         case GTK_SCROLL_PAGE_DOWN:
2499         case GTK_SCROLL_PAGE_FORWARD:
2500           increment = PAGE_STEP_SIZE;
2501           break;
2502
2503         case GTK_SCROLL_START:
2504           new_position = priv->min_position;
2505           break;
2506
2507         case GTK_SCROLL_END:
2508           new_position = priv->max_position;
2509           break;
2510
2511         default:
2512           break;
2513         }
2514
2515       if (increment)
2516         {
2517           if (is_rtl (paned))
2518             increment = -increment;
2519
2520           new_position = old_position + increment;
2521         }
2522
2523       new_position = CLAMP (new_position, priv->min_position, priv->max_position);
2524
2525       if (old_position != new_position)
2526         gtk_paned_set_position (paned, new_position);
2527
2528       return TRUE;
2529     }
2530
2531   return FALSE;
2532 }
2533
2534 static void
2535 gtk_paned_restore_focus (GtkPaned *paned)
2536 {
2537   GtkPanedPrivate *priv = paned->priv;
2538
2539   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
2540     {
2541       if (priv->saved_focus &&
2542           gtk_widget_get_sensitive (priv->saved_focus))
2543         {
2544           gtk_widget_grab_focus (priv->saved_focus);
2545         }
2546       else
2547         {
2548           /* the saved focus is somehow not available for focusing,
2549            * try
2550            *   1) tabbing into the paned widget
2551            * if that didn't work,
2552            *   2) unset focus for the window if there is one
2553            */
2554
2555           if (!gtk_widget_child_focus (GTK_WIDGET (paned), GTK_DIR_TAB_FORWARD))
2556             {
2557               GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
2558
2559               if (GTK_IS_WINDOW (toplevel))
2560                 gtk_window_set_focus (GTK_WINDOW (toplevel), NULL);
2561             }
2562         }
2563
2564       gtk_paned_set_saved_focus (paned, NULL);
2565       gtk_paned_set_first_paned (paned, NULL);
2566     }
2567 }
2568
2569 static gboolean
2570 gtk_paned_accept_position (GtkPaned *paned)
2571 {
2572   GtkPanedPrivate *priv = paned->priv;
2573
2574   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
2575     {
2576       priv->original_position = -1;
2577       gtk_paned_restore_focus (paned);
2578
2579       return TRUE;
2580     }
2581
2582   return FALSE;
2583 }
2584
2585
2586 static gboolean
2587 gtk_paned_cancel_position (GtkPaned *paned)
2588 {
2589   GtkPanedPrivate *priv = paned->priv;
2590
2591   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
2592     {
2593       if (priv->original_position != -1)
2594         {
2595           gtk_paned_set_position (paned, priv->original_position);
2596           priv->original_position = -1;
2597         }
2598
2599       gtk_paned_restore_focus (paned);
2600       return TRUE;
2601     }
2602
2603   return FALSE;
2604 }
2605
2606 static gboolean
2607 gtk_paned_cycle_handle_focus (GtkPaned *paned,
2608                               gboolean  reversed)
2609 {
2610   GtkPanedPrivate *priv = paned->priv;
2611   GtkPaned *next, *prev;
2612
2613   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
2614     {
2615       GtkPaned *focus = NULL;
2616
2617       if (!priv->first_paned)
2618         {
2619           /* The first_pane has disappeared. As an ad-hoc solution,
2620            * we make the currently focused paned the first_paned. To the
2621            * user this will seem like the paned cycling has been reset.
2622            */
2623
2624           gtk_paned_set_first_paned (paned, paned);
2625         }
2626
2627       gtk_paned_find_neighbours (paned, &next, &prev);
2628
2629       if (reversed && prev &&
2630           prev != paned && paned != priv->first_paned)
2631         {
2632           focus = prev;
2633         }
2634       else if (!reversed && next &&
2635                next != paned && next != priv->first_paned)
2636         {
2637           focus = next;
2638         }
2639       else
2640         {
2641           gtk_paned_accept_position (paned);
2642           return TRUE;
2643         }
2644
2645       g_assert (focus);
2646
2647       gtk_paned_set_saved_focus (focus, priv->saved_focus);
2648       gtk_paned_set_first_paned (focus, priv->first_paned);
2649
2650       gtk_paned_set_saved_focus (paned, NULL);
2651       gtk_paned_set_first_paned (paned, NULL);
2652
2653       gtk_widget_grab_focus (GTK_WIDGET (focus));
2654
2655       if (!gtk_widget_is_focus (GTK_WIDGET (paned)))
2656         {
2657           priv->original_position = -1;
2658           focus->priv->original_position = gtk_paned_get_position (focus);
2659         }
2660     }
2661   else
2662     {
2663       GtkContainer *container = GTK_CONTAINER (paned);
2664       GtkPaned *focus;
2665       GtkPaned *first;
2666       GtkPaned *prev, *next;
2667       GtkWidget *toplevel;
2668       GtkWidget *focus_child;
2669
2670       gtk_paned_find_neighbours (paned, &next, &prev);
2671       focus_child = gtk_container_get_focus_child (container);
2672
2673       if (focus_child == priv->child1)
2674         {
2675           if (reversed)
2676             {
2677               focus = prev;
2678               first = paned;
2679             }
2680           else
2681             {
2682               focus = paned;
2683               first = paned;
2684             }
2685         }
2686       else if (focus_child == priv->child2)
2687         {
2688           if (reversed)
2689             {
2690               focus = paned;
2691               first = next;
2692             }
2693           else
2694             {
2695               focus = next;
2696               first = next;
2697             }
2698         }
2699       else
2700         {
2701           /* Focus is not inside this paned, and we don't have focus.
2702            * Presumably this happened because the application wants us
2703            * to start keyboard navigating.
2704            */
2705           focus = paned;
2706
2707           if (reversed)
2708             first = paned;
2709           else
2710             first = next;
2711         }
2712
2713       toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
2714
2715       if (GTK_IS_WINDOW (toplevel))
2716         gtk_paned_set_saved_focus (focus, gtk_window_get_focus (GTK_WINDOW (toplevel)));
2717       gtk_paned_set_first_paned (focus, first);
2718       focus->priv->original_position = gtk_paned_get_position (focus);
2719
2720       gtk_widget_grab_focus (GTK_WIDGET (focus));
2721    }
2722
2723   return TRUE;
2724 }
2725
2726 static gboolean
2727 gtk_paned_toggle_handle_focus (GtkPaned *paned)
2728 {
2729   /* This function/signal has the wrong name. It is called when you
2730    * press Tab or Shift-Tab and what we do is act as if
2731    * the user pressed Return and then Tab or Shift-Tab
2732    */
2733   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
2734     gtk_paned_accept_position (paned);
2735
2736   return FALSE;
2737 }
2738
2739 /**
2740  * gtk_paned_get_handle_window:
2741  * @paned: a #GtkPaned
2742  *
2743  * Returns the #GdkWindow of the handle. This function is
2744  * useful when handling button or motion events because it
2745  * enables the callback to distinguish between the window
2746  * of the paned, a child and the handle.
2747  *
2748  * Return value: (transfer none): the paned's handle window.
2749  *
2750  * Since: 2.20
2751  **/
2752 GdkWindow *
2753 gtk_paned_get_handle_window (GtkPaned *paned)
2754 {
2755   g_return_val_if_fail (GTK_IS_PANED (paned), NULL);
2756
2757   return paned->priv->handle;
2758 }