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 "gdk/gdkkeysyms.h"
  32 #include "gtkbindings.h"
  33 #include "gtkmain.h"
  34 #include "gtkmarshalers.h"
  35 #include "gtkorientable.h"
  36 #include "gtksizerequest.h"
  37 #include "gtkwindow.h"
  38
  39 #include "gtkprivate.h"
  40 #include "gtkintl.h"
  41
  42
  43
  44 struct _GtkPanedPrivate
  45 {
  46   GtkOrientation  orientation;
  47   GtkPaned       *first_paned;
  48   GtkWidget      *child1;
  49   GtkWidget      *child2;
  50   GtkWidget      *last_child1_focus;
  51   GtkWidget      *last_child2_focus;
  52   GtkWidget      *saved_focus;
  53
  54   GdkCursorType  cursor_type;
  55   GdkDevice     *grab_device;
  56   GdkRectangle   handle_pos;
  57   GdkWindow     *handle;
  58
  59   gint          child1_size;
  60   gint          drag_pos;
  61   gint          last_allocation;
  62   gint          max_position;
  63   gint          min_position;
  64   gint          original_position;
  65
  66   guint         handle_prelit : 1;
  67   guint         in_drag       : 1;
  68   guint         in_recursion  : 1;
  69   guint         child1_resize : 1;
  70   guint         child1_shrink : 1;
  71   guint         child2_resize : 1;
  72   guint         child2_shrink : 1;
  73   guint         position_set  : 1;
  74
  75   guint32       grab_time;
  76 };
  77
  78 enum {
  79   PROP_0,
  80   PROP_ORIENTATION,
  81   PROP_POSITION,
  82   PROP_POSITION_SET,
  83   PROP_MIN_POSITION,
  84   PROP_MAX_POSITION
  85 };
  86
  87 enum {
  88   CHILD_PROP_0,
  89   CHILD_PROP_RESIZE,
  90   CHILD_PROP_SHRINK
  91 };
  92
  93 enum {
  94   CYCLE_CHILD_FOCUS,
  95   TOGGLE_HANDLE_FOCUS,
  96   MOVE_HANDLE,
  97   CYCLE_HANDLE_FOCUS,
  98   ACCEPT_POSITION,
  99   CANCEL_POSITION,
 100   LAST_SIGNAL
 101 };
 102
 103 static void     gtk_paned_set_property          (GObject          *object,
 104                                                  guint             prop_id,
 105                                                  const GValue     *value,
 106                                                  GParamSpec       *pspec);
 107 static void     gtk_paned_get_property          (GObject          *object,
 108                                                  guint             prop_id,
 109                                                  GValue           *value,
 110                                                  GParamSpec       *pspec);
 111 static void     gtk_paned_set_child_property    (GtkContainer     *container,
 112                                                  GtkWidget        *child,
 113                                                  guint             property_id,
 114                                                  const GValue     *value,
 115                                                  GParamSpec       *pspec);
 116 static void     gtk_paned_get_child_property    (GtkContainer     *container,
 117                                                  GtkWidget        *child,
 118                                                  guint             property_id,
 119                                                  GValue           *value,
 120                                                  GParamSpec       *pspec);
 121 static void     gtk_paned_finalize              (GObject          *object);
 122
 123 static void     gtk_paned_size_request          (GtkWidget        *widget,
 124                                                  GtkRequisition   *requisition);
 125 static void     gtk_paned_size_allocate         (GtkWidget        *widget,
 126                                                  GtkAllocation    *allocation);
 127 static void     gtk_paned_realize               (GtkWidget        *widget);
 128 static void     gtk_paned_unrealize             (GtkWidget        *widget);
 129 static void     gtk_paned_map                   (GtkWidget        *widget);
 130 static void     gtk_paned_unmap                 (GtkWidget        *widget);
 131 static void     gtk_paned_state_changed         (GtkWidget        *widget,
 132                                                  GtkStateType      previous_state);
 133 static gboolean gtk_paned_expose                (GtkWidget        *widget,
 134                                                  GdkEventExpose   *event);
 135 static gboolean gtk_paned_enter                 (GtkWidget        *widget,
 136                                                  GdkEventCrossing *event);
 137 static gboolean gtk_paned_leave                 (GtkWidget        *widget,
 138                                                  GdkEventCrossing *event);
 139 static gboolean gtk_paned_button_press          (GtkWidget        *widget,
 140                                                  GdkEventButton   *event);
 141 static gboolean gtk_paned_button_release        (GtkWidget        *widget,
 142                                                  GdkEventButton   *event);
 143 static gboolean gtk_paned_motion                (GtkWidget        *widget,
 144                                                  GdkEventMotion   *event);
 145 static gboolean gtk_paned_focus                 (GtkWidget        *widget,
 146                                                  GtkDirectionType  direction);
 147 static gboolean gtk_paned_grab_broken           (GtkWidget          *widget,
 148                                                  GdkEventGrabBroken *event);
 149 static void     gtk_paned_add                   (GtkContainer     *container,
 150                                                  GtkWidget        *widget);
 151 static void     gtk_paned_remove                (GtkContainer     *container,
 152                                                  GtkWidget        *widget);
 153 static void     gtk_paned_forall                (GtkContainer     *container,
 154                                                  gboolean          include_internals,
 155                                                  GtkCallback       callback,
 156                                                  gpointer          callback_data);
 157 static void     gtk_paned_calc_position         (GtkPaned         *paned,
 158                                                  gint              allocation,
 159                                                  gint              child1_req,
 160                                                  gint              child2_req);
 161 static void     gtk_paned_set_focus_child       (GtkContainer     *container,
 162                                                  GtkWidget        *child);
 163 static void     gtk_paned_set_saved_focus       (GtkPaned         *paned,
 164                                                  GtkWidget        *widget);
 165 static void     gtk_paned_set_first_paned       (GtkPaned         *paned,
 166                                                  GtkPaned         *first_paned);
 167 static void     gtk_paned_set_last_child1_focus (GtkPaned         *paned,
 168                                                  GtkWidget        *widget);
 169 static void     gtk_paned_set_last_child2_focus (GtkPaned         *paned,
 170                                                  GtkWidget        *widget);
 171 static gboolean gtk_paned_cycle_child_focus     (GtkPaned         *paned,
 172                                                  gboolean          reverse);
 173 static gboolean gtk_paned_cycle_handle_focus    (GtkPaned         *paned,
 174                                                  gboolean          reverse);
 175 static gboolean gtk_paned_move_handle           (GtkPaned         *paned,
 176                                                  GtkScrollType     scroll);
 177 static gboolean gtk_paned_accept_position       (GtkPaned         *paned);
 178 static gboolean gtk_paned_cancel_position       (GtkPaned         *paned);
 179 static gboolean gtk_paned_toggle_handle_focus   (GtkPaned         *paned);
 180
 181 static GType    gtk_paned_child_type            (GtkContainer     *container);
 182 static void     gtk_paned_grab_notify           (GtkWidget        *widget,
 183                                                  gboolean          was_grabbed);
 184
 185
 186 G_DEFINE_TYPE_WITH_CODE (GtkPaned, gtk_paned, GTK_TYPE_CONTAINER,
 187                          G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE,
 188                                                 NULL))
 189
 190 static guint signals[LAST_SIGNAL] = { 0 };
 191
 192
 193 static void
 194 add_tab_bindings (GtkBindingSet    *binding_set,
 195                   GdkModifierType   modifiers)
 196 {
 197   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Tab, modifiers,
 198                                 "toggle-handle-focus", 0);
 199   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Tab, modifiers,
 200                                 "toggle-handle-focus", 0);
 201 }
 202
 203 static void
 204 add_move_binding (GtkBindingSet   *binding_set,
 205                   guint            keyval,
 206                   GdkModifierType  mask,
 207                   GtkScrollType    scroll)
 208 {
 209   gtk_binding_entry_add_signal (binding_set, keyval, mask,
 210                                 "move-handle", 1,
 211                                 GTK_TYPE_SCROLL_TYPE, scroll);
 212 }
 213
 214 static void
 215 gtk_paned_class_init (GtkPanedClass *class)
 216 {
 217   GObjectClass *object_class;
 218   GtkWidgetClass *widget_class;
 219   GtkContainerClass *container_class;
 220   GtkPanedClass *paned_class;
 221   GtkBindingSet *binding_set;
 222
 223   object_class = (GObjectClass *) class;
 224   widget_class = (GtkWidgetClass *) class;
 225   container_class = (GtkContainerClass *) class;
 226   paned_class = (GtkPanedClass *) class;
 227
 228   object_class->set_property = gtk_paned_set_property;
 229   object_class->get_property = gtk_paned_get_property;
 230   object_class->finalize = gtk_paned_finalize;
 231
 232   widget_class->size_request = gtk_paned_size_request;
 233   widget_class->size_allocate = gtk_paned_size_allocate;
 234   widget_class->realize = gtk_paned_realize;
 235   widget_class->unrealize = gtk_paned_unrealize;
 236   widget_class->map = gtk_paned_map;
 237   widget_class->unmap = gtk_paned_unmap;
 238   widget_class->expose_event = gtk_paned_expose;
 239   widget_class->focus = gtk_paned_focus;
 240   widget_class->enter_notify_event = gtk_paned_enter;
 241   widget_class->leave_notify_event = gtk_paned_leave;
 242   widget_class->button_press_event = gtk_paned_button_press;
 243   widget_class->button_release_event = gtk_paned_button_release;
 244   widget_class->motion_notify_event = gtk_paned_motion;
 245   widget_class->grab_broken_event = gtk_paned_grab_broken;
 246   widget_class->grab_notify = gtk_paned_grab_notify;
 247   widget_class->state_changed = gtk_paned_state_changed;
 248
 249   container_class->add = gtk_paned_add;
 250   container_class->remove = gtk_paned_remove;
 251   container_class->forall = gtk_paned_forall;
 252   container_class->child_type = gtk_paned_child_type;
 253   container_class->set_focus_child = gtk_paned_set_focus_child;
 254   container_class->set_child_property = gtk_paned_set_child_property;
 255   container_class->get_child_property = gtk_paned_get_child_property;
 256
 257   paned_class->cycle_child_focus = gtk_paned_cycle_child_focus;
 258   paned_class->toggle_handle_focus = gtk_paned_toggle_handle_focus;
 259   paned_class->move_handle = gtk_paned_move_handle;
 260   paned_class->cycle_handle_focus = gtk_paned_cycle_handle_focus;
 261   paned_class->accept_position = gtk_paned_accept_position;
 262   paned_class->cancel_position = gtk_paned_cancel_position;
 263
 264   g_object_class_override_property (object_class,
 265                                     PROP_ORIENTATION,
 266                                     "orientation");
 267
 268   g_object_class_install_property (object_class,
 269                                    PROP_POSITION,
 270                                    g_param_spec_int ("position",
 271                                                      P_("Position"),
 272                                                      P_("Position of paned separator in pixels (0 means all the way to the left/top)"),
 273                                                      0,
 274                                                      G_MAXINT,
 275                                                      0,
 276                                                      GTK_PARAM_READWRITE));
 277
 278   g_object_class_install_property (object_class,
 279                                    PROP_POSITION_SET,
 280                                    g_param_spec_boolean ("position-set",
 281                                                          P_("Position Set"),
 282                                                          P_("TRUE if the Position property should be used"),
 283                                                          FALSE,
 284                                                          GTK_PARAM_READWRITE));
 285
 286   gtk_widget_class_install_style_property (widget_class,
 287                                            g_param_spec_int ("handle-size",
 288                                                              P_("Handle Size"),
 289                                                              P_("Width of handle"),
 290                                                              0,
 291                                                              G_MAXINT,
 292                                                              5,
 293                                                              GTK_PARAM_READABLE));
 294   /**
 295    * GtkPaned:min-position:
 296    *
 297    * The smallest possible value for the position property. This property is derived from the
 298    * size and shrinkability of the widget's children.
 299    *
 300    * Since: 2.4
 301    */
 302   g_object_class_install_property (object_class,
 303                                    PROP_MIN_POSITION,
 304                                    g_param_spec_int ("min-position",
 305                                                      P_("Minimal Position"),
 306                                                      P_("Smallest possible value for the \"position\" property"),
 307                                                      0,
 308                                                      G_MAXINT,
 309                                                      0,
 310                                                      GTK_PARAM_READABLE));
 311
 312   /**
 313    * GtkPaned:max-position:
 314    *
 315    * The largest possible value for the position property. This property is derived from the
 316    * size and shrinkability of the widget's children.
 317    *
 318    * Since: 2.4
 319    */
 320   g_object_class_install_property (object_class,
 321                                    PROP_MAX_POSITION,
 322                                    g_param_spec_int ("max-position",
 323                                                      P_("Maximal Position"),
 324                                                      P_("Largest possible value for the \"position\" property"),
 325                                                      0,
 326                                                      G_MAXINT,
 327                                                      G_MAXINT,
 328                                                      GTK_PARAM_READABLE));
 329
 330   /**
 331    * GtkPaned:resize:
 332    *
 333    * The "resize" child property determines whether the child expands and
 334    * shrinks along with the paned widget.
 335    *
 336    * Since: 2.4
 337    */
 338   gtk_container_class_install_child_property (container_class,
 339                                               CHILD_PROP_RESIZE,
 340                                               g_param_spec_boolean ("resize",
 341                                                                     P_("Resize"),
 342                                                                     P_("If TRUE, the child expands and shrinks along with the paned widget"),
 343                                                                     TRUE,
 344                                                                     GTK_PARAM_READWRITE));
 345
 346   /**
 347    * GtkPaned:shrink:
 348    *
 349    * The "shrink" child property determines whether the child can be made
 350    * smaller than its requisition.
 351    *
 352    * Since: 2.4
 353    */
 354   gtk_container_class_install_child_property (container_class,
 355                                               CHILD_PROP_SHRINK,
 356                                               g_param_spec_boolean ("shrink",
 357                                                                     P_("Shrink"),
 358                                                                     P_("If TRUE, the child can be made smaller than its requisition"),
 359                                                                     TRUE,
 360                                                                     GTK_PARAM_READWRITE));
 361
 362   /**
 363    * GtkPaned::cycle-child-focus:
 364    * @widget: the object that received the signal
 365    * @reversed: whether cycling backward or forward
 366    *
 367    * The ::cycle-child-focus signal is a
 368    * <link linkend="keybinding-signals">keybinding signal</link>
 369    * which gets emitted to cycle the focus between the children of the paned.
 370    *
 371    * The default binding is f6.
 372    *
 373    * Since: 2.0
 374    */
 375   signals [CYCLE_CHILD_FOCUS] =
 376     g_signal_new (I_("cycle-child-focus"),
 377                   G_TYPE_FROM_CLASS (object_class),
 378                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 379                   G_STRUCT_OFFSET (GtkPanedClass, cycle_child_focus),
 380                   NULL, NULL,
 381                   _gtk_marshal_BOOLEAN__BOOLEAN,
 382                   G_TYPE_BOOLEAN, 1,
 383                   G_TYPE_BOOLEAN);
 384
 385   /**
 386    * GtkPaned::toggle-handle-focus:
 387    * @widget: the object that received the signal
 388    *
 389    * The ::toggle-handle-focus is a
 390    * <link linkend="keybinding-signals">keybinding signal</link>
 391    * which gets emitted to accept the current position of the handle and then
 392    * move focus to the next widget in the focus chain.
 393    *
 394    * The default binding is Tab.
 395    *
 396    * Since: 2.0
 397    */
 398   signals [TOGGLE_HANDLE_FOCUS] =
 399     g_signal_new (I_("toggle-handle-focus"),
 400                   G_TYPE_FROM_CLASS (object_class),
 401                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 402                   G_STRUCT_OFFSET (GtkPanedClass, toggle_handle_focus),
 403                   NULL, NULL,
 404                   _gtk_marshal_BOOLEAN__VOID,
 405                   G_TYPE_BOOLEAN, 0);
 406
 407   /**
 408    * GtkPaned::move-handle:
 409    * @widget: the object that received the signal
 410    * @scroll_type: a #GtkScrollType
 411    *
 412    * The ::move-handle signal is a
 413    * <link linkend="keybinding-signals">keybinding signal</link>
 414    * which gets emitted to move the handle when the user is using key bindings
 415    * to move it.
 416    *
 417    * Since: 2.0
 418    */
 419   signals[MOVE_HANDLE] =
 420     g_signal_new (I_("move-handle"),
 421                   G_TYPE_FROM_CLASS (object_class),
 422                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 423                   G_STRUCT_OFFSET (GtkPanedClass, move_handle),
 424                   NULL, NULL,
 425                   _gtk_marshal_BOOLEAN__ENUM,
 426                   G_TYPE_BOOLEAN, 1,
 427                   GTK_TYPE_SCROLL_TYPE);
 428
 429   /**
 430    * GtkPaned::cycle-handle-focus:
 431    * @widget: the object that received the signal
 432    * @reversed: whether cycling backward or forward
 433    *
 434    * The ::cycle-handle-focus signal is a
 435    * <link linkend="keybinding-signals">keybinding signal</link>
 436    * which gets emitted to cycle whether the paned should grab focus to allow
 437    * the user to change position of the handle by using key bindings.
 438    *
 439    * The default binding for this signal is f8.
 440    *
 441    * Since: 2.0
 442    */
 443   signals [CYCLE_HANDLE_FOCUS] =
 444     g_signal_new (I_("cycle-handle-focus"),
 445                   G_TYPE_FROM_CLASS (object_class),
 446                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 447                   G_STRUCT_OFFSET (GtkPanedClass, cycle_handle_focus),
 448                   NULL, NULL,
 449                   _gtk_marshal_BOOLEAN__BOOLEAN,
 450                   G_TYPE_BOOLEAN, 1,
 451                   G_TYPE_BOOLEAN);
 452
 453   /**
 454    * GtkPaned::accept-position:
 455    * @widget: the object that received the signal
 456    *
 457    * The ::accept-position signal is a
 458    * <link linkend="keybinding-signals">keybinding signal</link>
 459    * which gets emitted to accept the current position of the handle when
 460    * moving it using key bindings.
 461    *
 462    * The default binding for this signal is Return or Space.
 463    *
 464    * Since: 2.0
 465    */
 466   signals [ACCEPT_POSITION] =
 467     g_signal_new (I_("accept-position"),
 468                   G_TYPE_FROM_CLASS (object_class),
 469                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 470                   G_STRUCT_OFFSET (GtkPanedClass, accept_position),
 471                   NULL, NULL,
 472                   _gtk_marshal_BOOLEAN__VOID,
 473                   G_TYPE_BOOLEAN, 0);
 474
 475   /**
 476    * GtkPaned::cancel-position:
 477    * @widget: the object that received the signal
 478    *
 479    * The ::cancel-position signal is a
 480    * <link linkend="keybinding-signals">keybinding signal</link>
 481    * which gets emitted to cancel moving the position of the handle using key
 482    * bindings. The position of the handle will be reset to the value prior to
 483    * moving it.
 484    *
 485    * The default binding for this signal is Escape.
 486    *
 487    * Since: 2.0
 488    */
 489   signals [CANCEL_POSITION] =
 490     g_signal_new (I_("cancel-position"),
 491                   G_TYPE_FROM_CLASS (object_class),
 492                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 493                   G_STRUCT_OFFSET (GtkPanedClass, cancel_position),
 494                   NULL, NULL,
 495                   _gtk_marshal_BOOLEAN__VOID,
 496                   G_TYPE_BOOLEAN, 0);
 497
 498   binding_set = gtk_binding_set_by_class (class);
 499
 500   /* F6 and friends */
 501   gtk_binding_entry_add_signal (binding_set,
 502                                 GDK_KEY_F6, 0,
 503                                 "cycle-child-focus", 1,
 504                                 G_TYPE_BOOLEAN, FALSE);
 505   gtk_binding_entry_add_signal (binding_set,
 506                                 GDK_KEY_F6, GDK_SHIFT_MASK,
 507                                 "cycle-child-focus", 1,
 508                                 G_TYPE_BOOLEAN, TRUE);
 509
 510   /* F8 and friends */
 511   gtk_binding_entry_add_signal (binding_set,
 512                                 GDK_KEY_F8, 0,
 513                                 "cycle-handle-focus", 1,
 514                                 G_TYPE_BOOLEAN, FALSE);
 515
 516   gtk_binding_entry_add_signal (binding_set,
 517                                 GDK_KEY_F8, GDK_SHIFT_MASK,
 518                                 "cycle-handle-focus", 1,
 519                                 G_TYPE_BOOLEAN, TRUE);
 520
 521   add_tab_bindings (binding_set, 0);
 522   add_tab_bindings (binding_set, GDK_CONTROL_MASK);
 523   add_tab_bindings (binding_set, GDK_SHIFT_MASK);
 524   add_tab_bindings (binding_set, GDK_CONTROL_MASK | GDK_SHIFT_MASK);
 525
 526   /* accept and cancel positions */
 527   gtk_binding_entry_add_signal (binding_set,
 528                                 GDK_KEY_Escape, 0,
 529                                 "cancel-position", 0);
 530
 531   gtk_binding_entry_add_signal (binding_set,
 532                                 GDK_KEY_Return, 0,
 533                                 "accept-position", 0);
 534   gtk_binding_entry_add_signal (binding_set,
 535                                 GDK_KEY_ISO_Enter, 0,
 536                                 "accept-position", 0);
 537   gtk_binding_entry_add_signal (binding_set,
 538                                 GDK_KEY_KP_Enter, 0,
 539                                 "accept-position", 0);
 540   gtk_binding_entry_add_signal (binding_set,
 541                                 GDK_KEY_space, 0,
 542                                 "accept-position", 0);
 543   gtk_binding_entry_add_signal (binding_set,
 544                                 GDK_KEY_KP_Space, 0,
 545                                 "accept-position", 0);
 546
 547   /* move handle */
 548   add_move_binding (binding_set, GDK_KEY_Left, 0, GTK_SCROLL_STEP_LEFT);
 549   add_move_binding (binding_set, GDK_KEY_KP_Left, 0, GTK_SCROLL_STEP_LEFT);
 550   add_move_binding (binding_set, GDK_KEY_Left, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_LEFT);
 551   add_move_binding (binding_set, GDK_KEY_KP_Left, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_LEFT);
 552
 553   add_move_binding (binding_set, GDK_KEY_Right, 0, GTK_SCROLL_STEP_RIGHT);
 554   add_move_binding (binding_set, GDK_KEY_Right, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_RIGHT);
 555   add_move_binding (binding_set, GDK_KEY_KP_Right, 0, GTK_SCROLL_STEP_RIGHT);
 556   add_move_binding (binding_set, GDK_KEY_KP_Right, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_RIGHT);
 557
 558   add_move_binding (binding_set, GDK_KEY_Up, 0, GTK_SCROLL_STEP_UP);
 559   add_move_binding (binding_set, GDK_KEY_Up, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_UP);
 560   add_move_binding (binding_set, GDK_KEY_KP_Up, 0, GTK_SCROLL_STEP_UP);
 561   add_move_binding (binding_set, GDK_KEY_KP_Up, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_UP);
 562   add_move_binding (binding_set, GDK_KEY_Page_Up, 0, GTK_SCROLL_PAGE_UP);
 563   add_move_binding (binding_set, GDK_KEY_KP_Page_Up, 0, GTK_SCROLL_PAGE_UP);
 564
 565   add_move_binding (binding_set, GDK_KEY_Down, 0, GTK_SCROLL_STEP_DOWN);
 566   add_move_binding (binding_set, GDK_KEY_Down, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_DOWN);
 567   add_move_binding (binding_set, GDK_KEY_KP_Down, 0, GTK_SCROLL_STEP_DOWN);
 568   add_move_binding (binding_set, GDK_KEY_KP_Down, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_DOWN);
 569   add_move_binding (binding_set, GDK_KEY_Page_Down, 0, GTK_SCROLL_PAGE_RIGHT);
 570   add_move_binding (binding_set, GDK_KEY_KP_Page_Down, 0, GTK_SCROLL_PAGE_RIGHT);
 571
 572   add_move_binding (binding_set, GDK_KEY_Home, 0, GTK_SCROLL_START);
 573   add_move_binding (binding_set, GDK_KEY_KP_Home, 0, GTK_SCROLL_START);
 574   add_move_binding (binding_set, GDK_KEY_End, 0, GTK_SCROLL_END);
 575   add_move_binding (binding_set, GDK_KEY_KP_End, 0, GTK_SCROLL_END);
 576
 577   g_type_class_add_private (object_class, sizeof (GtkPanedPrivate));
 578 }
 579
 580 static GType
 581 gtk_paned_child_type (GtkContainer *container)
 582 {
 583   GtkPaned *paned = GTK_PANED (container);
 584   GtkPanedPrivate *priv = paned->priv;
 585
 586   if (!priv->child1 || !priv->child2)
 587     return GTK_TYPE_WIDGET;
 588   else
 589     return G_TYPE_NONE;
 590 }
 591
 592 static void
 593 gtk_paned_init (GtkPaned *paned)
 594 {
 595   GtkPanedPrivate *priv;
 596
 597   gtk_widget_set_has_window (GTK_WIDGET (paned), FALSE);
 598   gtk_widget_set_can_focus (GTK_WIDGET (paned), TRUE);
 599
 600   /* We only need to redraw when the handle position moves, which is
 601    * independent of the overall allocation of the GtkPaned
 602    */
 603   gtk_widget_set_redraw_on_allocate (GTK_WIDGET (paned), FALSE);
 604
 605   paned->priv = G_TYPE_INSTANCE_GET_PRIVATE (paned, GTK_TYPE_PANED, GtkPanedPrivate);
 606   priv = paned->priv;
 607
 608   priv->orientation = GTK_ORIENTATION_HORIZONTAL;
 609   priv->cursor_type = GDK_SB_H_DOUBLE_ARROW;
 610
 611   priv->child1 = NULL;
 612   priv->child2 = NULL;
 613   priv->handle = NULL;
 614   priv->cursor_type = GDK_CROSS;
 615
 616   priv->handle_pos.width = 5;
 617   priv->handle_pos.height = 5;
 618   priv->position_set = FALSE;
 619   priv->last_allocation = -1;
 620   priv->in_drag = FALSE;
 621
 622   priv->last_child1_focus = NULL;
 623   priv->last_child2_focus = NULL;
 624   priv->in_recursion = FALSE;
 625   priv->handle_prelit = FALSE;
 626   priv->original_position = -1;
 627
 628   priv->handle_pos.x = -1;
 629   priv->handle_pos.y = -1;
 630
 631   priv->drag_pos = -1;
 632 }
 633
 634 static void
 635 gtk_paned_set_property (GObject        *object,
 636                         guint           prop_id,
 637                         const GValue   *value,
 638                         GParamSpec     *pspec)
 639 {
 640   GtkPaned *paned = GTK_PANED (object);
 641   GtkPanedPrivate *priv = paned->priv;
 642
 643   switch (prop_id)
 644     {
 645     case PROP_ORIENTATION:
 646       priv->orientation = g_value_get_enum (value);
 647
 648       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
 649         priv->cursor_type = GDK_SB_H_DOUBLE_ARROW;
 650       else
 651         priv->cursor_type = GDK_SB_V_DOUBLE_ARROW;
 652
 653       /* state_changed updates the cursor */
 654       gtk_paned_state_changed (GTK_WIDGET (paned), gtk_widget_get_state (GTK_WIDGET (paned)));
 655       gtk_widget_queue_resize (GTK_WIDGET (paned));
 656       break;
 657     case PROP_POSITION:
 658       gtk_paned_set_position (paned, g_value_get_int (value));
 659       break;
 660     case PROP_POSITION_SET:
 661       priv->position_set = g_value_get_boolean (value);
 662       gtk_widget_queue_resize_no_redraw (GTK_WIDGET (paned));
 663       break;
 664     default:
 665       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 666       break;
 667     }
 668 }
 669
 670 static void
 671 gtk_paned_get_property (GObject        *object,
 672                         guint           prop_id,
 673                         GValue         *value,
 674                         GParamSpec     *pspec)
 675 {
 676   GtkPaned *paned = GTK_PANED (object);
 677   GtkPanedPrivate *priv = paned->priv;
 678
 679   switch (prop_id)
 680     {
 681     case PROP_ORIENTATION:
 682       g_value_set_enum (value, priv->orientation);
 683       break;
 684     case PROP_POSITION:
 685       g_value_set_int (value, priv->child1_size);
 686       break;
 687     case PROP_POSITION_SET:
 688       g_value_set_boolean (value, priv->position_set);
 689       break;
 690     case PROP_MIN_POSITION:
 691       g_value_set_int (value, priv->min_position);
 692       break;
 693     case PROP_MAX_POSITION:
 694       g_value_set_int (value, priv->max_position);
 695       break;
 696     default:
 697       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 698       break;
 699     }
 700 }
 701
 702 static void
 703 gtk_paned_set_child_property (GtkContainer    *container,
 704                               GtkWidget       *child,
 705                               guint            property_id,
 706                               const GValue    *value,
 707                               GParamSpec      *pspec)
 708 {
 709   GtkPaned *paned = GTK_PANED (container);
 710   GtkPanedPrivate *priv = paned->priv;
 711   gboolean old_value, new_value;
 712
 713   g_assert (child == priv->child1 || child == priv->child2);
 714
 715   new_value = g_value_get_boolean (value);
 716   switch (property_id)
 717     {
 718     case CHILD_PROP_RESIZE:
 719       if (child == priv->child1)
 720         {
 721           old_value = priv->child1_resize;
 722           priv->child1_resize = new_value;
 723         }
 724       else
 725         {
 726           old_value = priv->child2_resize;
 727           priv->child2_resize = new_value;
 728         }
 729       break;
 730     case CHILD_PROP_SHRINK:
 731       if (child == priv->child1)
 732         {
 733           old_value = priv->child1_shrink;
 734           priv->child1_shrink = new_value;
 735         }
 736       else
 737         {
 738           old_value = priv->child2_shrink;
 739           priv->child2_shrink = new_value;
 740         }
 741       break;
 742     default:
 743       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 744       old_value = -1; /* quiet gcc */
 745       break;
 746     }
 747   if (old_value != new_value)
 748     gtk_widget_queue_resize_no_redraw (GTK_WIDGET (container));
 749 }
 750
 751 static void
 752 gtk_paned_get_child_property (GtkContainer *container,
 753                               GtkWidget    *child,
 754                               guint         property_id,
 755                               GValue       *value,
 756                               GParamSpec   *pspec)
 757 {
 758   GtkPaned *paned = GTK_PANED (container);
 759   GtkPanedPrivate *priv = paned->priv;
 760
 761   g_assert (child == priv->child1 || child == priv->child2);
 762
 763   switch (property_id)
 764     {
 765     case CHILD_PROP_RESIZE:
 766       if (child == priv->child1)
 767         g_value_set_boolean (value, priv->child1_resize);
 768       else
 769         g_value_set_boolean (value, priv->child2_resize);
 770       break;
 771     case CHILD_PROP_SHRINK:
 772       if (child == priv->child1)
 773         g_value_set_boolean (value, priv->child1_shrink);
 774       else
 775         g_value_set_boolean (value, priv->child2_shrink);
 776       break;
 777     default:
 778       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 779       break;
 780     }
 781 }
 782
 783 static void
 784 gtk_paned_finalize (GObject *object)
 785 {
 786   GtkPaned *paned = GTK_PANED (object);
 787
 788   gtk_paned_set_saved_focus (paned, NULL);
 789   gtk_paned_set_first_paned (paned, NULL);
 790
 791   G_OBJECT_CLASS (gtk_paned_parent_class)->finalize (object);
 792 }
 793
 794 static void
 795 gtk_paned_size_request (GtkWidget      *widget,
 796                         GtkRequisition *requisition)
 797 {
 798   GtkPaned *paned = GTK_PANED (widget);
 799   GtkPanedPrivate *priv = paned->priv;
 800   GtkRequisition child_requisition;
 801   guint border_width;
 802
 803   requisition->width = 0;
 804   requisition->height = 0;
 805
 806   if (priv->child1 && gtk_widget_get_visible (priv->child1))
 807     {
 808       gtk_widget_size_request (priv->child1, &child_requisition);
 809
 810       requisition->height = child_requisition.height;
 811       requisition->width = child_requisition.width;
 812     }
 813
 814   if (priv->child2 && gtk_widget_get_visible (priv->child2))
 815     {
 816       gtk_widget_size_request (priv->child2, &child_requisition);
 817
 818       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
 819         {
 820           requisition->height = MAX (requisition->height,
 821                                      child_requisition.height);
 822           requisition->width += child_requisition.width;
 823         }
 824       else
 825         {
 826           requisition->width = MAX (requisition->width,
 827                                     child_requisition.width);
 828           requisition->height += child_requisition.height;
 829         }
 830     }
 831
 832   border_width = gtk_container_get_border_width (GTK_CONTAINER (paned));
 833   requisition->width += border_width * 2;
 834   requisition->height += border_width * 2;
 835
 836   if (priv->child1 && gtk_widget_get_visible (priv->child1) &&
 837       priv->child2 && gtk_widget_get_visible (priv->child2))
 838     {
 839       gint handle_size;
 840
 841       gtk_widget_style_get (widget, "handle-size", &handle_size, NULL);
 842
 843       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
 844         requisition->width += handle_size;
 845       else
 846         requisition->height += handle_size;
 847     }
 848 }
 849
 850 static void
 851 flip_child (GtkWidget     *widget,
 852             GtkAllocation *child_pos)
 853 {
 854   GtkAllocation allocation;
 855   gint x, width;
 856
 857   gtk_widget_get_allocation (widget, &allocation);
 858   x = allocation.x;
 859   width = allocation.width;
 860
 861   child_pos->x = 2 * x + width - child_pos->x - child_pos->width;
 862 }
 863
 864 static void
 865 gtk_paned_size_allocate (GtkWidget     *widget,
 866                          GtkAllocation *allocation)
 867 {
 868   GtkPaned *paned = GTK_PANED (widget);
 869   GtkPanedPrivate *priv = paned->priv;
 870   GtkAllocation widget_allocation;
 871   guint border_width;
 872
 873   border_width = gtk_container_get_border_width (GTK_CONTAINER (paned));
 874
 875   gtk_widget_set_allocation (widget, allocation);
 876
 877   if (priv->child1 && gtk_widget_get_visible (priv->child1) &&
 878       priv->child2 && gtk_widget_get_visible (priv->child2))
 879     {
 880       GtkRequisition child1_requisition;
 881       GtkRequisition child2_requisition;
 882       GtkAllocation child1_allocation;
 883       GtkAllocation child2_allocation;
 884       GtkAllocation priv_child1_allocation;
 885       GdkRectangle old_handle_pos;
 886       gint handle_size;
 887
 888       gtk_widget_style_get (widget, "handle-size", &handle_size, NULL);
 889
 890       gtk_size_request_get_size (GTK_SIZE_REQUEST (priv->child1),
 891                                  &child1_requisition, NULL);
 892       gtk_size_request_get_size (GTK_SIZE_REQUEST (priv->child2),
 893                                  &child2_requisition, NULL);
 894
 895       old_handle_pos = priv->handle_pos;
 896
 897       gtk_widget_get_allocation (widget, &widget_allocation);
 898
 899       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
 900         {
 901           gtk_paned_calc_position (paned,
 902                                    MAX (1, widget_allocation.width
 903                                         - handle_size
 904                                         - 2 * border_width),
 905                                    child1_requisition.width,
 906                                    child2_requisition.width);
 907
 908           priv->handle_pos.x = widget_allocation.x + priv->child1_size + border_width;
 909           priv->handle_pos.y = widget_allocation.y + border_width;
 910           priv->handle_pos.width = handle_size;
 911           priv->handle_pos.height = MAX (1, widget_allocation.height - 2 * border_width);
 912
 913           child1_allocation.height = child2_allocation.height = MAX (1, (gint) allocation->height - border_width * 2);
 914           child1_allocation.width = MAX (1, priv->child1_size);
 915           child1_allocation.x = widget_allocation.x + border_width;
 916           child1_allocation.y = child2_allocation.y = widget_allocation.y + border_width;
 917
 918           child2_allocation.x = child1_allocation.x + priv->child1_size + priv->handle_pos.width;
 919           child2_allocation.width = MAX (1, widget_allocation.x + widget_allocation.width - child2_allocation.x - border_width);
 920
 921           if (gtk_widget_get_direction (GTK_WIDGET (widget)) == GTK_TEXT_DIR_RTL)
 922             {
 923               flip_child (widget, &(child2_allocation));
 924               flip_child (widget, &(child1_allocation));
 925               flip_child (widget, &(priv->handle_pos));
 926             }
 927         }
 928       else
 929         {
 930           gtk_paned_calc_position (paned,
 931                                    MAX (1, widget_allocation.height
 932                                         - handle_size
 933                                         - 2 * border_width),
 934                                    child1_requisition.height,
 935                                    child2_requisition.height);
 936
 937           priv->handle_pos.x = widget_allocation.x + border_width;
 938           priv->handle_pos.y = widget_allocation.y + priv->child1_size + border_width;
 939           priv->handle_pos.width = MAX (1, (gint) widget_allocation.width - 2 * border_width);
 940           priv->handle_pos.height = handle_size;
 941
 942           child1_allocation.width = child2_allocation.width = MAX (1, (gint) allocation->width - border_width * 2);
 943           child1_allocation.height = MAX (1, priv->child1_size);
 944           child1_allocation.x = child2_allocation.x = widget_allocation.x + border_width;
 945           child1_allocation.y = widget_allocation.y + border_width;
 946
 947           child2_allocation.y = child1_allocation.y + priv->child1_size + priv->handle_pos.height;
 948           child2_allocation.height = MAX (1, widget_allocation.y + widget_allocation.height - child2_allocation.y - border_width);
 949         }
 950
 951       if (gtk_widget_get_mapped (widget) &&
 952           (old_handle_pos.x != priv->handle_pos.x ||
 953            old_handle_pos.y != priv->handle_pos.y ||
 954            old_handle_pos.width != priv->handle_pos.width ||
 955            old_handle_pos.height != priv->handle_pos.height))
 956         {
 957           GdkWindow *window;
 958
 959           window = gtk_widget_get_window (widget);
 960           gdk_window_invalidate_rect (window, &old_handle_pos, FALSE);
 961           gdk_window_invalidate_rect (window, &priv->handle_pos, FALSE);
 962         }
 963
 964       if (gtk_widget_get_realized (widget))
 965         {
 966           if (gtk_widget_get_mapped (widget))
 967             gdk_window_show (priv->handle);
 968
 969           if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
 970             {
 971               gdk_window_move_resize (priv->handle,
 972                                       priv->handle_pos.x,
 973                                       priv->handle_pos.y,
 974                                       handle_size,
 975                                       priv->handle_pos.height);
 976             }
 977           else
 978             {
 979               gdk_window_move_resize (priv->handle,
 980                                       priv->handle_pos.x,
 981                                       priv->handle_pos.y,
 982                                       priv->handle_pos.width,
 983                                       handle_size);
 984             }
 985         }
 986
 987       /* Now allocate the childen, making sure, when resizing not to
 988        * overlap the windows
 989        */
 990       gtk_widget_get_allocation (priv->child1, &priv_child1_allocation);
 991       if (gtk_widget_get_mapped (widget) &&
 992           ((priv->orientation == GTK_ORIENTATION_HORIZONTAL &&
 993             priv_child1_allocation.width < child1_allocation.width) ||
 994
 995            (priv->orientation == GTK_ORIENTATION_VERTICAL &&
 996             priv_child1_allocation.height < child1_allocation.height)))
 997         {
 998           gtk_widget_size_allocate (priv->child2, &child2_allocation);
 999           gtk_widget_size_allocate (priv->child1, &child1_allocation);
1000         }
1001       else
1002         {
1003           gtk_widget_size_allocate (priv->child1, &child1_allocation);
1004           gtk_widget_size_allocate (priv->child2, &child2_allocation);
1005         }
1006     }
1007   else
1008     {
1009       GtkAllocation child_allocation;
1010
1011       if (gtk_widget_get_realized (widget))
1012         gdk_window_hide (priv->handle);
1013
1014       if (priv->child1)
1015         gtk_widget_set_child_visible (priv->child1, TRUE);
1016       if (priv->child2)
1017         gtk_widget_set_child_visible (priv->child2, TRUE);
1018
1019       gtk_widget_get_allocation (widget, &widget_allocation);
1020
1021       child_allocation.x = widget_allocation.x + border_width;
1022       child_allocation.y = widget_allocation.y + border_width;
1023       child_allocation.width = MAX (1, allocation->width - 2 * border_width);
1024       child_allocation.height = MAX (1, allocation->height - 2 * border_width);
1025
1026       if (priv->child1 && gtk_widget_get_visible (priv->child1))
1027         gtk_widget_size_allocate (priv->child1, &child_allocation);
1028       else if (priv->child2 && gtk_widget_get_visible (priv->child2))
1029         gtk_widget_size_allocate (priv->child2, &child_allocation);
1030     }
1031 }
1032
1033 static void
1034 gtk_paned_realize (GtkWidget *widget)
1035 {
1036   GtkPaned *paned = GTK_PANED (widget);
1037   GtkPanedPrivate *priv = paned->priv;
1038   GdkWindow *window;
1039   GdkWindowAttr attributes;
1040   gint attributes_mask;
1041
1042   gtk_widget_set_realized (widget, TRUE);
1043
1044   window = gtk_widget_get_parent_window (widget);
1045   gtk_widget_set_window (widget, window);
1046   g_object_ref (window);
1047
1048   attributes.window_type = GDK_WINDOW_CHILD;
1049   attributes.wclass = GDK_INPUT_ONLY;
1050   attributes.x = priv->handle_pos.x;
1051   attributes.y = priv->handle_pos.y;
1052   attributes.width = priv->handle_pos.width;
1053   attributes.height = priv->handle_pos.height;
1054   attributes.event_mask = gtk_widget_get_events (widget);
1055   attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
1056                             GDK_BUTTON_RELEASE_MASK |
1057                             GDK_ENTER_NOTIFY_MASK |
1058                             GDK_LEAVE_NOTIFY_MASK |
1059                             GDK_POINTER_MOTION_MASK |
1060                             GDK_POINTER_MOTION_HINT_MASK);
1061   attributes_mask = GDK_WA_X | GDK_WA_Y;
1062   if (gtk_widget_is_sensitive (widget))
1063     {
1064       attributes.cursor = gdk_cursor_new_for_display (gtk_widget_get_display (widget),
1065                                                       priv->cursor_type);
1066       attributes_mask |= GDK_WA_CURSOR;
1067     }
1068
1069   priv->handle = gdk_window_new (window,
1070                                  &attributes, attributes_mask);
1071   gdk_window_set_user_data (priv->handle, paned);
1072   if (attributes_mask & GDK_WA_CURSOR)
1073     gdk_cursor_unref (attributes.cursor);
1074
1075   gtk_widget_style_attach (widget);
1076
1077   if (priv->child1 && gtk_widget_get_visible (priv->child1) &&
1078       priv->child2 && gtk_widget_get_visible (priv->child2))
1079     gdk_window_show (priv->handle);
1080 }
1081
1082 static void
1083 gtk_paned_unrealize (GtkWidget *widget)
1084 {
1085   GtkPaned *paned = GTK_PANED (widget);
1086   GtkPanedPrivate *priv = paned->priv;
1087
1088   if (priv->handle)
1089     {
1090       gdk_window_set_user_data (priv->handle, NULL);
1091       gdk_window_destroy (priv->handle);
1092       priv->handle = NULL;
1093     }
1094
1095   gtk_paned_set_last_child1_focus (paned, NULL);
1096   gtk_paned_set_last_child2_focus (paned, NULL);
1097   gtk_paned_set_saved_focus (paned, NULL);
1098   gtk_paned_set_first_paned (paned, NULL);
1099
1100   GTK_WIDGET_CLASS (gtk_paned_parent_class)->unrealize (widget);
1101 }
1102
1103 static void
1104 gtk_paned_map (GtkWidget *widget)
1105 {
1106   GtkPaned *paned = GTK_PANED (widget);
1107   GtkPanedPrivate *priv = paned->priv;
1108
1109   gdk_window_show (priv->handle);
1110
1111   GTK_WIDGET_CLASS (gtk_paned_parent_class)->map (widget);
1112 }
1113
1114 static void
1115 gtk_paned_unmap (GtkWidget *widget)
1116 {
1117   GtkPaned *paned = GTK_PANED (widget);
1118   GtkPanedPrivate *priv = paned->priv;
1119
1120   gdk_window_hide (priv->handle);
1121
1122   GTK_WIDGET_CLASS (gtk_paned_parent_class)->unmap (widget);
1123 }
1124
1125 static gboolean
1126 gtk_paned_expose (GtkWidget      *widget,
1127                   GdkEventExpose *event)
1128 {
1129   GtkPaned *paned = GTK_PANED (widget);
1130   GtkPanedPrivate *priv = paned->priv;
1131
1132   if (gtk_widget_get_visible (widget) && gtk_widget_get_mapped (widget) &&
1133       priv->child1 && gtk_widget_get_visible (priv->child1) &&
1134       priv->child2 && gtk_widget_get_visible (priv->child2))
1135     {
1136       GtkStateType state;
1137
1138       if (gtk_widget_is_focus (widget))
1139         state = GTK_STATE_SELECTED;
1140       else if (priv->handle_prelit)
1141         state = GTK_STATE_PRELIGHT;
1142       else
1143         state = gtk_widget_get_state (widget);
1144
1145       gtk_paint_handle (gtk_widget_get_style (widget),
1146                         gtk_widget_get_window (widget),
1147                         state, GTK_SHADOW_NONE,
1148                         &priv->handle_pos, widget, "paned",
1149                         priv->handle_pos.x, priv->handle_pos.y,
1150                         priv->handle_pos.width, priv->handle_pos.height,
1151                         !priv->orientation);
1152     }
1153
1154   /* Chain up to draw children */
1155   GTK_WIDGET_CLASS (gtk_paned_parent_class)->expose_event (widget, event);
1156
1157   return FALSE;
1158 }
1159
1160 static gboolean
1161 is_rtl (GtkPaned *paned)
1162 {
1163   GtkPanedPrivate *priv = paned->priv;
1164
1165   if (priv->orientation == GTK_ORIENTATION_HORIZONTAL &&
1166       gtk_widget_get_direction (GTK_WIDGET (paned)) == GTK_TEXT_DIR_RTL)
1167     {
1168       return TRUE;
1169     }
1170
1171   return FALSE;
1172 }
1173
1174 static void
1175 update_drag (GtkPaned *paned)
1176 {
1177   GtkPanedPrivate *priv = paned->priv;
1178   GtkAllocation allocation;
1179   GtkWidget *widget = GTK_WIDGET (paned);
1180   gint pos;
1181   gint handle_size;
1182   gint size;
1183
1184   if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
1185     gtk_widget_get_pointer (widget, &pos, NULL);
1186   else
1187     gtk_widget_get_pointer (widget, NULL, &pos);
1188
1189   pos -= priv->drag_pos;
1190
1191   if (is_rtl (paned))
1192     {
1193       gtk_widget_style_get (widget,
1194                             "handle-size", &handle_size,
1195                             NULL);
1196
1197       gtk_widget_get_allocation (widget, &allocation);
1198       size = allocation.width - pos - handle_size;
1199     }
1200   else
1201     {
1202       size = pos;
1203     }
1204
1205   size -= gtk_container_get_border_width (GTK_CONTAINER (paned));
1206
1207   size = CLAMP (size, priv->min_position, priv->max_position);
1208
1209   if (size != priv->child1_size)
1210     gtk_paned_set_position (paned, size);
1211 }
1212
1213 static gboolean
1214 gtk_paned_enter (GtkWidget        *widget,
1215                  GdkEventCrossing *event)
1216 {
1217   GtkPaned *paned = GTK_PANED (widget);
1218   GtkPanedPrivate *priv = paned->priv;
1219
1220   if (priv->in_drag)
1221     update_drag (paned);
1222   else
1223     {
1224       priv->handle_prelit = TRUE;
1225       gtk_widget_queue_draw_area (widget,
1226                                   priv->handle_pos.x,
1227                                   priv->handle_pos.y,
1228                                   priv->handle_pos.width,
1229                                   priv->handle_pos.height);
1230     }
1231
1232   return TRUE;
1233 }
1234
1235 static gboolean
1236 gtk_paned_leave (GtkWidget        *widget,
1237                  GdkEventCrossing *event)
1238 {
1239   GtkPaned *paned = GTK_PANED (widget);
1240   GtkPanedPrivate *priv = paned->priv;
1241
1242   if (priv->in_drag)
1243     update_drag (paned);
1244   else
1245     {
1246       priv->handle_prelit = FALSE;
1247       gtk_widget_queue_draw_area (widget,
1248                                   priv->handle_pos.x,
1249                                   priv->handle_pos.y,
1250                                   priv->handle_pos.width,
1251                                   priv->handle_pos.height);
1252     }
1253
1254   return TRUE;
1255 }
1256
1257 static gboolean
1258 gtk_paned_focus (GtkWidget        *widget,
1259                  GtkDirectionType  direction)
1260
1261 {
1262   gboolean retval;
1263
1264   /* This is a hack, but how can this be done without
1265    * excessive cut-and-paste from gtkcontainer.c?
1266    */
1267
1268   gtk_widget_set_can_focus (widget, FALSE);
1269   retval = GTK_WIDGET_CLASS (gtk_paned_parent_class)->focus (widget, direction);
1270   gtk_widget_set_can_focus (widget, TRUE);
1271
1272   return retval;
1273 }
1274
1275 static gboolean
1276 gtk_paned_button_press (GtkWidget      *widget,
1277                         GdkEventButton *event)
1278 {
1279   GtkPaned *paned = GTK_PANED (widget);
1280   GtkPanedPrivate *priv = paned->priv;
1281
1282   if (!priv->in_drag &&
1283       (event->window == priv->handle) && (event->button == 1))
1284     {
1285       /* We need a server grab here, not gtk_grab_add(), since
1286        * we don't want to pass events on to the widget's children */
1287       if (gdk_device_grab (event->device,
1288                            priv->handle,
1289                            GDK_OWNERSHIP_WINDOW, FALSE,
1290                            GDK_POINTER_MOTION_HINT_MASK
1291                            | GDK_BUTTON1_MOTION_MASK
1292                            | GDK_BUTTON_RELEASE_MASK
1293                            | GDK_ENTER_NOTIFY_MASK
1294                            | GDK_LEAVE_NOTIFY_MASK,
1295                            NULL, event->time) != GDK_GRAB_SUCCESS)
1296         return FALSE;
1297
1298       priv->in_drag = TRUE;
1299       priv->grab_time = event->time;
1300       priv->grab_device = event->device;
1301
1302       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
1303         priv->drag_pos = event->x;
1304       else
1305         priv->drag_pos = event->y;
1306
1307       return TRUE;
1308     }
1309
1310   return FALSE;
1311 }
1312
1313 static gboolean
1314 gtk_paned_grab_broken (GtkWidget          *widget,
1315                        GdkEventGrabBroken *event)
1316 {
1317   GtkPaned *paned = GTK_PANED (widget);
1318   GtkPanedPrivate *priv = paned->priv;
1319
1320   priv->in_drag = FALSE;
1321   priv->drag_pos = -1;
1322   priv->position_set = TRUE;
1323
1324   return TRUE;
1325 }
1326
1327 static void
1328 stop_drag (GtkPaned *paned)
1329 {
1330   GtkPanedPrivate *priv = paned->priv;
1331
1332   priv->in_drag = FALSE;
1333   priv->drag_pos = -1;
1334   priv->position_set = TRUE;
1335
1336   gdk_device_ungrab (priv->grab_device,
1337                      priv->grab_time);
1338   priv->grab_device = NULL;
1339 }
1340
1341 static void
1342 gtk_paned_grab_notify (GtkWidget *widget,
1343                        gboolean   was_grabbed)
1344 {
1345   GtkPaned *paned = GTK_PANED (widget);
1346   GtkPanedPrivate *priv = paned->priv;
1347   GdkDevice *grab_device;
1348
1349   grab_device = priv->grab_device;
1350
1351   if (priv->in_drag && grab_device &&
1352       gtk_widget_device_is_shadowed (widget, grab_device))
1353     stop_drag (paned);
1354 }
1355
1356 static void
1357 gtk_paned_state_changed (GtkWidget    *widget,
1358                          GtkStateType  previous_state)
1359 {
1360   GtkPaned *paned = GTK_PANED (widget);
1361   GtkPanedPrivate *priv = paned->priv;
1362   GdkCursor *cursor;
1363
1364   if (gtk_widget_get_realized (widget))
1365     {
1366       if (gtk_widget_is_sensitive (widget))
1367         cursor = gdk_cursor_new_for_display (gtk_widget_get_display (widget),
1368                                              priv->cursor_type);
1369       else
1370         cursor = NULL;
1371
1372       gdk_window_set_cursor (priv->handle, cursor);
1373
1374       if (cursor)
1375         gdk_cursor_unref (cursor);
1376     }
1377 }
1378
1379 static gboolean
1380 gtk_paned_button_release (GtkWidget      *widget,
1381                           GdkEventButton *event)
1382 {
1383   GtkPaned *paned = GTK_PANED (widget);
1384   GtkPanedPrivate *priv = paned->priv;
1385
1386   if (priv->in_drag && (event->button == 1))
1387     {
1388       stop_drag (paned);
1389
1390       return TRUE;
1391     }
1392
1393   return FALSE;
1394 }
1395
1396 static gboolean
1397 gtk_paned_motion (GtkWidget      *widget,
1398                   GdkEventMotion *event)
1399 {
1400   GtkPaned *paned = GTK_PANED (widget);
1401   GtkPanedPrivate *priv = paned->priv;
1402
1403   if (priv->in_drag)
1404     {
1405       update_drag (paned);
1406       return TRUE;
1407     }
1408
1409   return FALSE;
1410 }
1411
1412 /**
1413  * gtk_paned_new:
1414  * @orientation: the paned's orientation.
1415  *
1416  * Creates a new #GtkPaned widget.
1417  *
1418  * Return value: a new #GtkPaned.
1419  *
1420  * Since: 3.0
1421  **/
1422 GtkWidget *
1423 gtk_paned_new (GtkOrientation orientation)
1424 {
1425   return g_object_new (GTK_TYPE_PANED,
1426                        "orientation", orientation,
1427                        NULL);
1428 }
1429
1430 void
1431 gtk_paned_add1 (GtkPaned  *paned,
1432                 GtkWidget *widget)
1433 {
1434   gtk_paned_pack1 (paned, widget, FALSE, TRUE);
1435 }
1436
1437 void
1438 gtk_paned_add2 (GtkPaned  *paned,
1439                 GtkWidget *widget)
1440 {
1441   gtk_paned_pack2 (paned, widget, TRUE, TRUE);
1442 }
1443
1444 void
1445 gtk_paned_pack1 (GtkPaned  *paned,
1446                  GtkWidget *child,
1447                  gboolean   resize,
1448                  gboolean   shrink)
1449 {
1450   GtkPanedPrivate *priv;
1451
1452   g_return_if_fail (GTK_IS_PANED (paned));
1453   g_return_if_fail (GTK_IS_WIDGET (child));
1454
1455   priv = paned->priv;
1456
1457   if (!priv->child1)
1458     {
1459       priv->child1 = child;
1460       priv->child1_resize = resize;
1461       priv->child1_shrink = shrink;
1462
1463       gtk_widget_set_parent (child, GTK_WIDGET (paned));
1464     }
1465 }
1466
1467 void
1468 gtk_paned_pack2 (GtkPaned  *paned,
1469                  GtkWidget *child,
1470                  gboolean   resize,
1471                  gboolean   shrink)
1472 {
1473   GtkPanedPrivate *priv;
1474
1475   g_return_if_fail (GTK_IS_PANED (paned));
1476   g_return_if_fail (GTK_IS_WIDGET (child));
1477
1478   priv = paned->priv;
1479
1480   if (!priv->child2)
1481     {
1482       priv->child2 = child;
1483       priv->child2_resize = resize;
1484       priv->child2_shrink = shrink;
1485
1486       gtk_widget_set_parent (child, GTK_WIDGET (paned));
1487     }
1488 }
1489
1490
1491 static void
1492 gtk_paned_add (GtkContainer *container,
1493                GtkWidget    *widget)
1494 {
1495   GtkPanedPrivate *priv;
1496   GtkPaned *paned;
1497
1498   g_return_if_fail (GTK_IS_PANED (container));
1499
1500   paned = GTK_PANED (container);
1501   priv = paned->priv;
1502
1503   if (!priv->child1)
1504     gtk_paned_add1 (paned, widget);
1505   else if (!priv->child2)
1506     gtk_paned_add2 (paned, widget);
1507   else
1508     g_warning ("GtkPaned cannot have more than 2 children\n");
1509 }
1510
1511 static void
1512 gtk_paned_remove (GtkContainer *container,
1513                   GtkWidget    *widget)
1514 {
1515   GtkPaned *paned = GTK_PANED (container);
1516   GtkPanedPrivate *priv = paned->priv;
1517   gboolean was_visible;
1518
1519   was_visible = gtk_widget_get_visible (widget);
1520
1521   if (priv->child1 == widget)
1522     {
1523       gtk_widget_unparent (widget);
1524
1525       priv->child1 = NULL;
1526
1527       if (was_visible && gtk_widget_get_visible (GTK_WIDGET (container)))
1528         gtk_widget_queue_resize_no_redraw (GTK_WIDGET (container));
1529     }
1530   else if (priv->child2 == widget)
1531     {
1532       gtk_widget_unparent (widget);
1533
1534       priv->child2 = NULL;
1535
1536       if (was_visible && gtk_widget_get_visible (GTK_WIDGET (container)))
1537         gtk_widget_queue_resize_no_redraw (GTK_WIDGET (container));
1538     }
1539 }
1540
1541 static void
1542 gtk_paned_forall (GtkContainer *container,
1543                   gboolean      include_internals,
1544                   GtkCallback   callback,
1545                   gpointer      callback_data)
1546 {
1547   GtkPanedPrivate *priv;
1548   GtkPaned *paned;
1549
1550   g_return_if_fail (callback != NULL);
1551
1552   paned = GTK_PANED (container);
1553   priv = paned->priv;
1554
1555   if (priv->child1)
1556     (*callback) (priv->child1, callback_data);
1557   if (priv->child2)
1558     (*callback) (priv->child2, callback_data);
1559 }
1560
1561 /**
1562  * gtk_paned_get_position:
1563  * @paned: a #GtkPaned widget
1564  *
1565  * Obtains the position of the divider between the two panes.
1566  *
1567  * Return value: position of the divider
1568  **/
1569 gint
1570 gtk_paned_get_position (GtkPaned  *paned)
1571 {
1572   g_return_val_if_fail (GTK_IS_PANED (paned), 0);
1573
1574   return paned->priv->child1_size;
1575 }
1576
1577 /**
1578  * gtk_paned_set_position:
1579  * @paned: a #GtkPaned widget
1580  * @position: pixel position of divider, a negative value means that the position
1581  *            is unset.
1582  *
1583  * Sets the position of the divider between the two panes.
1584  **/
1585 void
1586 gtk_paned_set_position (GtkPaned *paned,
1587                         gint      position)
1588 {
1589   GtkPanedPrivate *priv;
1590   GObject *object;
1591
1592   g_return_if_fail (GTK_IS_PANED (paned));
1593
1594   priv = paned->priv;
1595
1596   if (priv->child1_size == position)
1597     return;
1598
1599   object = G_OBJECT (paned);
1600
1601   if (position >= 0)
1602     {
1603       /* We don't clamp here - the assumption is that
1604        * if the total allocation changes at the same time
1605        * as the position, the position set is with reference
1606        * to the new total size. If only the position changes,
1607        * then clamping will occur in gtk_paned_calc_position()
1608        */
1609
1610       priv->child1_size = position;
1611       priv->position_set = TRUE;
1612     }
1613   else
1614     {
1615       priv->position_set = FALSE;
1616     }
1617
1618   g_object_freeze_notify (object);
1619   g_object_notify (object, "position");
1620   g_object_notify (object, "position-set");
1621   g_object_thaw_notify (object);
1622
1623   gtk_widget_queue_resize_no_redraw (GTK_WIDGET (paned));
1624
1625 #ifdef G_OS_WIN32
1626   /* Hacky work-around for bug #144269 */
1627   if (priv->child2 != NULL)
1628     {
1629       gtk_widget_queue_draw (priv->child2);
1630     }
1631 #endif
1632 }
1633
1634 /**
1635  * gtk_paned_get_child1:
1636  * @paned: a #GtkPaned widget
1637  *
1638  * Obtains the first child of the paned widget.
1639  *
1640  * Return value: first child, or %NULL if it is not set.
1641  *
1642  * Since: 2.4
1643  **/
1644 GtkWidget *
1645 gtk_paned_get_child1 (GtkPaned *paned)
1646 {
1647   g_return_val_if_fail (GTK_IS_PANED (paned), NULL);
1648
1649   return paned->priv->child1;
1650 }
1651
1652 /**
1653  * gtk_paned_get_child2:
1654  * @paned: a #GtkPaned widget
1655  *
1656  * Obtains the second child of the paned widget.
1657  *
1658  * Return value: second child, or %NULL if it is not set.
1659  *
1660  * Since: 2.4
1661  **/
1662 GtkWidget *
1663 gtk_paned_get_child2 (GtkPaned *paned)
1664 {
1665   g_return_val_if_fail (GTK_IS_PANED (paned), NULL);
1666
1667   return paned->priv->child2;
1668 }
1669
1670 static void
1671 gtk_paned_calc_position (GtkPaned *paned,
1672                          gint      allocation,
1673                          gint      child1_req,
1674                          gint      child2_req)
1675 {
1676   GtkPanedPrivate *priv = paned->priv;
1677   gint old_position;
1678   gint old_min_position;
1679   gint old_max_position;
1680
1681   old_position = priv->child1_size;
1682   old_min_position = priv->min_position;
1683   old_max_position = priv->max_position;
1684
1685   priv->min_position = priv->child1_shrink ? 0 : child1_req;
1686
1687   priv->max_position = allocation;
1688   if (!priv->child2_shrink)
1689     priv->max_position = MAX (1, priv->max_position - child2_req);
1690   priv->max_position = MAX (priv->min_position, priv->max_position);
1691
1692   if (!priv->position_set)
1693     {
1694       if (priv->child1_resize && !priv->child2_resize)
1695         priv->child1_size = MAX (0, allocation - child2_req);
1696       else if (!priv->child1_resize && priv->child2_resize)
1697         priv->child1_size = child1_req;
1698       else if (child1_req + child2_req != 0)
1699         priv->child1_size = allocation * ((gdouble)child1_req / (child1_req + child2_req)) + 0.5;
1700       else
1701         priv->child1_size = allocation * 0.5 + 0.5;
1702     }
1703   else
1704     {
1705       /* If the position was set before the initial allocation.
1706        * (priv->last_allocation <= 0) just clamp it and leave it.
1707        */
1708       if (priv->last_allocation > 0)
1709         {
1710           if (priv->child1_resize && !priv->child2_resize)
1711             priv->child1_size += allocation - priv->last_allocation;
1712           else if (!(!priv->child1_resize && priv->child2_resize))
1713             priv->child1_size = allocation * ((gdouble) priv->child1_size / (priv->last_allocation)) + 0.5;
1714         }
1715     }
1716
1717   priv->child1_size = CLAMP (priv->child1_size,
1718                               priv->min_position,
1719                               priv->max_position);
1720
1721   if (priv->child1)
1722     gtk_widget_set_child_visible (priv->child1, priv->child1_size != 0);
1723
1724   if (priv->child2)
1725     gtk_widget_set_child_visible (priv->child2, priv->child1_size != allocation);
1726
1727   g_object_freeze_notify (G_OBJECT (paned));
1728   if (priv->child1_size != old_position)
1729     g_object_notify (G_OBJECT (paned), "position");
1730   if (priv->min_position != old_min_position)
1731     g_object_notify (G_OBJECT (paned), "min-position");
1732   if (priv->max_position != old_max_position)
1733     g_object_notify (G_OBJECT (paned), "max-position");
1734   g_object_thaw_notify (G_OBJECT (paned));
1735
1736   priv->last_allocation = allocation;
1737 }
1738
1739 static void
1740 gtk_paned_set_saved_focus (GtkPaned *paned, GtkWidget *widget)
1741 {
1742   GtkPanedPrivate *priv = paned->priv;
1743
1744   if (priv->saved_focus)
1745     g_object_remove_weak_pointer (G_OBJECT (priv->saved_focus),
1746                                   (gpointer *)&(priv->saved_focus));
1747
1748   priv->saved_focus = widget;
1749
1750   if (priv->saved_focus)
1751     g_object_add_weak_pointer (G_OBJECT (priv->saved_focus),
1752                                (gpointer *)&(priv->saved_focus));
1753 }
1754
1755 static void
1756 gtk_paned_set_first_paned (GtkPaned *paned, GtkPaned *first_paned)
1757 {
1758   GtkPanedPrivate *priv = paned->priv;
1759
1760   if (priv->first_paned)
1761     g_object_remove_weak_pointer (G_OBJECT (priv->first_paned),
1762                                   (gpointer *)&(priv->first_paned));
1763
1764   priv->first_paned = first_paned;
1765
1766   if (priv->first_paned)
1767     g_object_add_weak_pointer (G_OBJECT (priv->first_paned),
1768                                (gpointer *)&(priv->first_paned));
1769 }
1770
1771 static void
1772 gtk_paned_set_last_child1_focus (GtkPaned *paned, GtkWidget *widget)
1773 {
1774   GtkPanedPrivate *priv = paned->priv;
1775
1776   if (priv->last_child1_focus)
1777     g_object_remove_weak_pointer (G_OBJECT (priv->last_child1_focus),
1778                                   (gpointer *)&(priv->last_child1_focus));
1779
1780   priv->last_child1_focus = widget;
1781
1782   if (priv->last_child1_focus)
1783     g_object_add_weak_pointer (G_OBJECT (priv->last_child1_focus),
1784                                (gpointer *)&(priv->last_child1_focus));
1785 }
1786
1787 static void
1788 gtk_paned_set_last_child2_focus (GtkPaned *paned, GtkWidget *widget)
1789 {
1790   GtkPanedPrivate *priv = paned->priv;
1791
1792   if (priv->last_child2_focus)
1793     g_object_remove_weak_pointer (G_OBJECT (priv->last_child2_focus),
1794                                   (gpointer *)&(priv->last_child2_focus));
1795
1796   priv->last_child2_focus = widget;
1797
1798   if (priv->last_child2_focus)
1799     g_object_add_weak_pointer (G_OBJECT (priv->last_child2_focus),
1800                                (gpointer *)&(priv->last_child2_focus));
1801 }
1802
1803 static GtkWidget *
1804 paned_get_focus_widget (GtkPaned *paned)
1805 {
1806   GtkWidget *toplevel;
1807
1808   toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
1809   if (gtk_widget_is_toplevel (toplevel))
1810     return gtk_window_get_focus (GTK_WINDOW (toplevel));
1811
1812   return NULL;
1813 }
1814
1815 static void
1816 gtk_paned_set_focus_child (GtkContainer *container,
1817                            GtkWidget    *focus_child)
1818 {
1819   GtkPaned *paned;
1820   GtkPanedPrivate *priv;
1821   GtkWidget *container_focus_child;
1822
1823   g_return_if_fail (GTK_IS_PANED (container));
1824
1825   paned = GTK_PANED (container);
1826   priv = paned->priv;
1827
1828   if (focus_child == NULL)
1829     {
1830       GtkWidget *last_focus;
1831       GtkWidget *w;
1832
1833       last_focus = paned_get_focus_widget (paned);
1834
1835       if (last_focus)
1836         {
1837           /* If there is one or more paned widgets between us and the
1838            * focus widget, we want the topmost of those as last_focus
1839            */
1840           for (w = last_focus; w != GTK_WIDGET (paned); w = gtk_widget_get_parent (w))
1841             if (GTK_IS_PANED (w))
1842               last_focus = w;
1843
1844           container_focus_child = gtk_container_get_focus_child (container);
1845           if (container_focus_child == priv->child1)
1846             gtk_paned_set_last_child1_focus (paned, last_focus);
1847           else if (container_focus_child == priv->child2)
1848             gtk_paned_set_last_child2_focus (paned, last_focus);
1849         }
1850     }
1851
1852   if (GTK_CONTAINER_CLASS (gtk_paned_parent_class)->set_focus_child)
1853     GTK_CONTAINER_CLASS (gtk_paned_parent_class)->set_focus_child (container, focus_child);
1854 }
1855
1856 static void
1857 gtk_paned_get_cycle_chain (GtkPaned          *paned,
1858                            GtkDirectionType   direction,
1859                            GList            **widgets)
1860 {
1861   GtkPanedPrivate *priv = paned->priv;
1862   GtkContainer *container = GTK_CONTAINER (paned);
1863   GtkWidget *ancestor = NULL;
1864   GtkWidget *focus_child;
1865   GtkWidget *parent;
1866   GtkWidget *widget = GTK_WIDGET (paned);
1867   GList *temp_list = NULL;
1868   GList *list;
1869
1870   if (priv->in_recursion)
1871     return;
1872
1873   g_assert (widgets != NULL);
1874
1875   if (priv->last_child1_focus &&
1876       !gtk_widget_is_ancestor (priv->last_child1_focus, widget))
1877     {
1878       gtk_paned_set_last_child1_focus (paned, NULL);
1879     }
1880
1881   if (priv->last_child2_focus &&
1882       !gtk_widget_is_ancestor (priv->last_child2_focus, widget))
1883     {
1884       gtk_paned_set_last_child2_focus (paned, NULL);
1885     }
1886
1887   parent = gtk_widget_get_parent (widget);
1888   if (parent)
1889     ancestor = gtk_widget_get_ancestor (parent, GTK_TYPE_PANED);
1890
1891   /* The idea here is that temp_list is a list of widgets we want to cycle
1892    * to. The list is prioritized so that the first element is our first
1893    * choice, the next our second, and so on.
1894    *
1895    * We can't just use g_list_reverse(), because we want to try
1896    * priv->last_child?_focus before priv->child?, both when we
1897    * are going forward and backward.
1898    */
1899   focus_child = gtk_container_get_focus_child (container);
1900   if (direction == GTK_DIR_TAB_FORWARD)
1901     {
1902       if (focus_child == priv->child1)
1903         {
1904           temp_list = g_list_append (temp_list, priv->last_child2_focus);
1905           temp_list = g_list_append (temp_list, priv->child2);
1906           temp_list = g_list_append (temp_list, ancestor);
1907         }
1908       else if (focus_child == priv->child2)
1909         {
1910           temp_list = g_list_append (temp_list, ancestor);
1911           temp_list = g_list_append (temp_list, priv->last_child1_focus);
1912           temp_list = g_list_append (temp_list, priv->child1);
1913         }
1914       else
1915         {
1916           temp_list = g_list_append (temp_list, priv->last_child1_focus);
1917           temp_list = g_list_append (temp_list, priv->child1);
1918           temp_list = g_list_append (temp_list, priv->last_child2_focus);
1919           temp_list = g_list_append (temp_list, priv->child2);
1920           temp_list = g_list_append (temp_list, ancestor);
1921         }
1922     }
1923   else
1924     {
1925       if (focus_child == priv->child1)
1926         {
1927           temp_list = g_list_append (temp_list, ancestor);
1928           temp_list = g_list_append (temp_list, priv->last_child2_focus);
1929           temp_list = g_list_append (temp_list, priv->child2);
1930         }
1931       else if (focus_child == priv->child2)
1932         {
1933           temp_list = g_list_append (temp_list, priv->last_child1_focus);
1934           temp_list = g_list_append (temp_list, priv->child1);
1935           temp_list = g_list_append (temp_list, ancestor);
1936         }
1937       else
1938         {
1939           temp_list = g_list_append (temp_list, priv->last_child2_focus);
1940           temp_list = g_list_append (temp_list, priv->child2);
1941           temp_list = g_list_append (temp_list, priv->last_child1_focus);
1942           temp_list = g_list_append (temp_list, priv->child1);
1943           temp_list = g_list_append (temp_list, ancestor);
1944         }
1945     }
1946
1947   /* Walk the list and expand all the paned widgets. */
1948   for (list = temp_list; list != NULL; list = list->next)
1949     {
1950       GtkWidget *widget = list->data;
1951
1952       if (widget)
1953         {
1954           if (GTK_IS_PANED (widget))
1955             {
1956               priv->in_recursion = TRUE;
1957               gtk_paned_get_cycle_chain (GTK_PANED (widget), direction, widgets);
1958               priv->in_recursion = FALSE;
1959             }
1960           else
1961             {
1962               *widgets = g_list_append (*widgets, widget);
1963             }
1964         }
1965     }
1966
1967   g_list_free (temp_list);
1968 }
1969
1970 static gboolean
1971 gtk_paned_cycle_child_focus (GtkPaned *paned,
1972                              gboolean  reversed)
1973 {
1974   GList *cycle_chain = NULL;
1975   GList *list;
1976
1977   GtkDirectionType direction = reversed? GTK_DIR_TAB_BACKWARD : GTK_DIR_TAB_FORWARD;
1978
1979   /* ignore f6 if the handle is focused */
1980   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1981     return TRUE;
1982
1983   /* we can't just let the event propagate up the hierarchy,
1984    * because the paned will want to cycle focus _unless_ an
1985    * ancestor paned handles the event
1986    */
1987   gtk_paned_get_cycle_chain (paned, direction, &cycle_chain);
1988
1989   for (list = cycle_chain; list != NULL; list = list->next)
1990     if (gtk_widget_child_focus (GTK_WIDGET (list->data), direction))
1991       break;
1992
1993   g_list_free (cycle_chain);
1994
1995   return TRUE;
1996 }
1997
1998 static void
1999 get_child_panes (GtkWidget  *widget,
2000                  GList     **panes)
2001 {
2002   if (!widget || !gtk_widget_get_realized (widget))
2003     return;
2004
2005   if (GTK_IS_PANED (widget))
2006     {
2007       GtkPaned *paned = GTK_PANED (widget);
2008       GtkPanedPrivate *priv = paned->priv;
2009
2010       get_child_panes (priv->child1, panes);
2011       *panes = g_list_prepend (*panes, widget);
2012       get_child_panes (priv->child2, panes);
2013     }
2014   else if (GTK_IS_CONTAINER (widget))
2015     {
2016       gtk_container_forall (GTK_CONTAINER (widget),
2017                             (GtkCallback)get_child_panes, panes);
2018     }
2019 }
2020
2021 static GList *
2022 get_all_panes (GtkPaned *paned)
2023 {
2024   GtkPaned *topmost = NULL;
2025   GList *result = NULL;
2026   GtkWidget *w;
2027
2028   for (w = GTK_WIDGET (paned); w != NULL; w = gtk_widget_get_parent (w))
2029     {
2030       if (GTK_IS_PANED (w))
2031         topmost = GTK_PANED (w);
2032     }
2033
2034   g_assert (topmost);
2035
2036   get_child_panes (GTK_WIDGET (topmost), &result);
2037
2038   return g_list_reverse (result);
2039 }
2040
2041 static void
2042 gtk_paned_find_neighbours (GtkPaned  *paned,
2043                            GtkPaned **next,
2044                            GtkPaned **prev)
2045 {
2046   GList *all_panes;
2047   GList *this_link;
2048
2049   all_panes = get_all_panes (paned);
2050   g_assert (all_panes);
2051
2052   this_link = g_list_find (all_panes, paned);
2053
2054   g_assert (this_link);
2055
2056   if (this_link->next)
2057     *next = this_link->next->data;
2058   else
2059     *next = all_panes->data;
2060
2061   if (this_link->prev)
2062     *prev = this_link->prev->data;
2063   else
2064     *prev = g_list_last (all_panes)->data;
2065
2066   g_list_free (all_panes);
2067 }
2068
2069 static gboolean
2070 gtk_paned_move_handle (GtkPaned      *paned,
2071                        GtkScrollType  scroll)
2072 {
2073   GtkPanedPrivate *priv = paned->priv;
2074
2075   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
2076     {
2077       gint old_position;
2078       gint new_position;
2079       gint increment;
2080
2081       enum {
2082         SINGLE_STEP_SIZE = 1,
2083         PAGE_STEP_SIZE   = 75
2084       };
2085
2086       new_position = old_position = gtk_paned_get_position (paned);
2087       increment = 0;
2088
2089       switch (scroll)
2090         {
2091         case GTK_SCROLL_STEP_LEFT:
2092         case GTK_SCROLL_STEP_UP:
2093         case GTK_SCROLL_STEP_BACKWARD:
2094           increment = - SINGLE_STEP_SIZE;
2095           break;
2096
2097         case GTK_SCROLL_STEP_RIGHT:
2098         case GTK_SCROLL_STEP_DOWN:
2099         case GTK_SCROLL_STEP_FORWARD:
2100           increment = SINGLE_STEP_SIZE;
2101           break;
2102
2103         case GTK_SCROLL_PAGE_LEFT:
2104         case GTK_SCROLL_PAGE_UP:
2105         case GTK_SCROLL_PAGE_BACKWARD:
2106           increment = - PAGE_STEP_SIZE;
2107           break;
2108
2109         case GTK_SCROLL_PAGE_RIGHT:
2110         case GTK_SCROLL_PAGE_DOWN:
2111         case GTK_SCROLL_PAGE_FORWARD:
2112           increment = PAGE_STEP_SIZE;
2113           break;
2114
2115         case GTK_SCROLL_START:
2116           new_position = priv->min_position;
2117           break;
2118
2119         case GTK_SCROLL_END:
2120           new_position = priv->max_position;
2121           break;
2122
2123         default:
2124           break;
2125         }
2126
2127       if (increment)
2128         {
2129           if (is_rtl (paned))
2130             increment = -increment;
2131
2132           new_position = old_position + increment;
2133         }
2134
2135       new_position = CLAMP (new_position, priv->min_position, priv->max_position);
2136
2137       if (old_position != new_position)
2138         gtk_paned_set_position (paned, new_position);
2139
2140       return TRUE;
2141     }
2142
2143   return FALSE;
2144 }
2145
2146 static void
2147 gtk_paned_restore_focus (GtkPaned *paned)
2148 {
2149   GtkPanedPrivate *priv = paned->priv;
2150
2151   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
2152     {
2153       if (priv->saved_focus &&
2154           gtk_widget_get_sensitive (priv->saved_focus))
2155         {
2156           gtk_widget_grab_focus (priv->saved_focus);
2157         }
2158       else
2159         {
2160           /* the saved focus is somehow not available for focusing,
2161            * try
2162            *   1) tabbing into the paned widget
2163            * if that didn't work,
2164            *   2) unset focus for the window if there is one
2165            */
2166
2167           if (!gtk_widget_child_focus (GTK_WIDGET (paned), GTK_DIR_TAB_FORWARD))
2168             {
2169               GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
2170
2171               if (GTK_IS_WINDOW (toplevel))
2172                 gtk_window_set_focus (GTK_WINDOW (toplevel), NULL);
2173             }
2174         }
2175
2176       gtk_paned_set_saved_focus (paned, NULL);
2177       gtk_paned_set_first_paned (paned, NULL);
2178     }
2179 }
2180
2181 static gboolean
2182 gtk_paned_accept_position (GtkPaned *paned)
2183 {
2184   GtkPanedPrivate *priv = paned->priv;
2185
2186   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
2187     {
2188       priv->original_position = -1;
2189       gtk_paned_restore_focus (paned);
2190
2191       return TRUE;
2192     }
2193
2194   return FALSE;
2195 }
2196
2197
2198 static gboolean
2199 gtk_paned_cancel_position (GtkPaned *paned)
2200 {
2201   GtkPanedPrivate *priv = paned->priv;
2202
2203   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
2204     {
2205       if (priv->original_position != -1)
2206         {
2207           gtk_paned_set_position (paned, priv->original_position);
2208           priv->original_position = -1;
2209         }
2210
2211       gtk_paned_restore_focus (paned);
2212       return TRUE;
2213     }
2214
2215   return FALSE;
2216 }
2217
2218 static gboolean
2219 gtk_paned_cycle_handle_focus (GtkPaned *paned,
2220                               gboolean  reversed)
2221 {
2222   GtkPanedPrivate *priv = paned->priv;
2223   GtkPaned *next, *prev;
2224
2225   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
2226     {
2227       GtkPaned *focus = NULL;
2228
2229       if (!priv->first_paned)
2230         {
2231           /* The first_pane has disappeared. As an ad-hoc solution,
2232            * we make the currently focused paned the first_paned. To the
2233            * user this will seem like the paned cycling has been reset.
2234            */
2235
2236           gtk_paned_set_first_paned (paned, paned);
2237         }
2238
2239       gtk_paned_find_neighbours (paned, &next, &prev);
2240
2241       if (reversed && prev &&
2242           prev != paned && paned != priv->first_paned)
2243         {
2244           focus = prev;
2245         }
2246       else if (!reversed && next &&
2247                next != paned && next != priv->first_paned)
2248         {
2249           focus = next;
2250         }
2251       else
2252         {
2253           gtk_paned_accept_position (paned);
2254           return TRUE;
2255         }
2256
2257       g_assert (focus);
2258
2259       gtk_paned_set_saved_focus (focus, priv->saved_focus);
2260       gtk_paned_set_first_paned (focus, priv->first_paned);
2261
2262       gtk_paned_set_saved_focus (paned, NULL);
2263       gtk_paned_set_first_paned (paned, NULL);
2264
2265       gtk_widget_grab_focus (GTK_WIDGET (focus));
2266
2267       if (!gtk_widget_is_focus (GTK_WIDGET (paned)))
2268         {
2269           priv->original_position = -1;
2270           focus->priv->original_position = gtk_paned_get_position (focus);
2271         }
2272     }
2273   else
2274     {
2275       GtkContainer *container = GTK_CONTAINER (paned);
2276       GtkPaned *focus;
2277       GtkPaned *first;
2278       GtkPaned *prev, *next;
2279       GtkWidget *toplevel;
2280       GtkWidget *focus_child;
2281
2282       gtk_paned_find_neighbours (paned, &next, &prev);
2283       focus_child = gtk_container_get_focus_child (container);
2284
2285       if (focus_child == priv->child1)
2286         {
2287           if (reversed)
2288             {
2289               focus = prev;
2290               first = paned;
2291             }
2292           else
2293             {
2294               focus = paned;
2295               first = paned;
2296             }
2297         }
2298       else if (focus_child == priv->child2)
2299         {
2300           if (reversed)
2301             {
2302               focus = paned;
2303               first = next;
2304             }
2305           else
2306             {
2307               focus = next;
2308               first = next;
2309             }
2310         }
2311       else
2312         {
2313           /* Focus is not inside this paned, and we don't have focus.
2314            * Presumably this happened because the application wants us
2315            * to start keyboard navigating.
2316            */
2317           focus = paned;
2318
2319           if (reversed)
2320             first = paned;
2321           else
2322             first = next;
2323         }
2324
2325       toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
2326
2327       if (GTK_IS_WINDOW (toplevel))
2328         gtk_paned_set_saved_focus (focus, gtk_window_get_focus (GTK_WINDOW (toplevel)));
2329       gtk_paned_set_first_paned (focus, first);
2330       focus->priv->original_position = gtk_paned_get_position (focus);
2331
2332       gtk_widget_grab_focus (GTK_WIDGET (focus));
2333    }
2334
2335   return TRUE;
2336 }
2337
2338 static gboolean
2339 gtk_paned_toggle_handle_focus (GtkPaned *paned)
2340 {
2341   /* This function/signal has the wrong name. It is called when you
2342    * press Tab or Shift-Tab and what we do is act as if
2343    * the user pressed Return and then Tab or Shift-Tab
2344    */
2345   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
2346     gtk_paned_accept_position (paned);
2347
2348   return FALSE;
2349 }
2350
2351 /**
2352  * gtk_paned_get_handle_window:
2353  * @paned: a #GtkPaned
2354  *
2355  * Returns the #GdkWindow of the handle. This function is
2356  * useful when handling button or motion events because it
2357  * enables the callback to distinguish between the window
2358  * of the paned, a child and the handle.
2359  *
2360  * Return value: the paned's handle window.
2361  *
2362  * Since: 2.20
2363  **/
2364 GdkWindow *
2365 gtk_paned_get_handle_window (GtkPaned *paned)
2366 {
2367   g_return_val_if_fail (GTK_IS_PANED (paned), NULL);
2368
2369   return paned->priv->handle;
2370 }