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 "gtkintl.h"
  28 #include "gtkpaned.h"
  29 #include "gtkbindings.h"
  30 #include "gtksignal.h"
  31 #include "gdk/gdkkeysyms.h"
  32 #include "gtkwindow.h"
  33 #include "gtkmain.h"
  34 #include "gtkmarshalers.h"
  35
  36 enum {
  37   PROP_0,
  38   PROP_POSITION,
  39   PROP_POSITION_SET
  40 };
  41
  42 enum {
  43   CYCLE_CHILD_FOCUS,
  44   TOGGLE_HANDLE_FOCUS,
  45   MOVE_HANDLE,
  46   CYCLE_HANDLE_FOCUS,
  47   ACCEPT_POSITION,
  48   CANCEL_POSITION,
  49   LAST_SIGNAL
  50 };
  51
  52 static void     gtk_paned_class_init            (GtkPanedClass    *klass);
  53 static void     gtk_paned_init                  (GtkPaned         *paned);
  54 static void     gtk_paned_set_property          (GObject          *object,
  55                                                  guint             prop_id,
  56                                                  const GValue     *value,
  57                                                  GParamSpec       *pspec);
  58 static void     gtk_paned_get_property          (GObject          *object,
  59                                                  guint             prop_id,
  60                                                  GValue           *value,
  61                                                  GParamSpec       *pspec);
  62 static void     gtk_paned_realize               (GtkWidget        *widget);
  63 static void     gtk_paned_unrealize             (GtkWidget        *widget);
  64 static void     gtk_paned_map                   (GtkWidget        *widget);
  65 static void     gtk_paned_unmap                 (GtkWidget        *widget);
  66 static gboolean gtk_paned_expose                (GtkWidget        *widget,
  67                                                  GdkEventExpose   *event);
  68 static gboolean gtk_paned_enter                 (GtkWidget        *widget,
  69                                                  GdkEventCrossing *event);
  70 static gboolean gtk_paned_leave                 (GtkWidget        *widget,
  71                                                  GdkEventCrossing *event);
  72 static gboolean gtk_paned_button_press          (GtkWidget      *widget,
  73                                                  GdkEventButton *event);
  74 static gboolean gtk_paned_button_release        (GtkWidget      *widget,
  75                                                  GdkEventButton *event);
  76 static gboolean gtk_paned_motion                (GtkWidget      *widget,
  77                                                  GdkEventMotion *event);
  78 static gboolean gtk_paned_focus                 (GtkWidget        *widget,
  79                                                  GtkDirectionType  direction);
  80 static void     gtk_paned_add                   (GtkContainer     *container,
  81                                                  GtkWidget        *widget);
  82 static void     gtk_paned_remove                (GtkContainer     *container,
  83                                                  GtkWidget        *widget);
  84 static void     gtk_paned_forall                (GtkContainer     *container,
  85                                                  gboolean          include_internals,
  86                                                  GtkCallback       callback,
  87                                                  gpointer          callback_data);
  88 static void     gtk_paned_set_focus_child       (GtkContainer     *container,
  89                                                  GtkWidget        *child);
  90 static void     gtk_paned_set_saved_focus       (GtkPaned         *paned,
  91                                                  GtkWidget        *widget);
  92 static void     gtk_paned_set_last_child1_focus (GtkPaned         *paned,
  93                                                  GtkWidget        *widget);
  94 static void     gtk_paned_set_last_child2_focus (GtkPaned         *paned,
  95                                                  GtkWidget        *widget);
  96 static gboolean gtk_paned_cycle_child_focus     (GtkPaned         *paned,
  97                                                  gboolean          reverse);
  98 static gboolean gtk_paned_cycle_handle_focus    (GtkPaned         *paned,
  99                                                  gboolean          reverse);
 100 static gboolean gtk_paned_move_handle           (GtkPaned         *paned,
 101                                                  GtkScrollType     scroll);
 102 static gboolean gtk_paned_accept_position       (GtkPaned         *paned);
 103 static gboolean gtk_paned_cancel_position       (GtkPaned         *paned);
 104 static gboolean gtk_paned_toggle_handle_focus   (GtkPaned         *paned);
 105 static GtkType  gtk_paned_child_type            (GtkContainer     *container);
 106
 107 static GtkContainerClass *parent_class = NULL;
 108
 109
 110 GtkType
 111 gtk_paned_get_type (void)
 112 {
 113   static GtkType paned_type = 0;
 114
 115   if (!paned_type)
 116     {
 117       static const GtkTypeInfo paned_info =
 118       {
 119         "GtkPaned",
 120         sizeof (GtkPaned),
 121         sizeof (GtkPanedClass),
 122         (GtkClassInitFunc) gtk_paned_class_init,
 123         (GtkObjectInitFunc) gtk_paned_init,
 124         /* reserved_1 */ NULL,
 125         /* reserved_2 */ NULL,
 126         (GtkClassInitFunc) NULL,
 127       };
 128
 129       paned_type = gtk_type_unique (GTK_TYPE_CONTAINER, &paned_info);
 130     }
 131
 132   return paned_type;
 133 }
 134
 135 static guint signals[LAST_SIGNAL] = { 0 };
 136
 137 static void
 138 add_tab_bindings (GtkBindingSet    *binding_set,
 139                   GdkModifierType   modifiers,
 140                   gboolean          reverse)
 141 {
 142   gtk_binding_entry_add_signal (binding_set, GDK_Tab, modifiers,
 143                                 "cycle_handle_focus", 1,
 144                                 G_TYPE_BOOLEAN, reverse);
 145   gtk_binding_entry_add_signal (binding_set, GDK_KP_Tab, modifiers,
 146                                 "cycle_handle_focus", 1,
 147                                 G_TYPE_BOOLEAN, reverse);
 148 }
 149
 150 static void
 151 add_move_binding (GtkBindingSet   *binding_set,
 152                   guint            keyval,
 153                   GdkModifierType  mask,
 154                   GtkScrollType    scroll)
 155 {
 156   gtk_binding_entry_add_signal (binding_set, keyval, mask,
 157                                 "move_handle", 1,
 158                                 GTK_TYPE_SCROLL_TYPE, scroll);
 159 }
 160
 161 static void
 162 gtk_paned_class_init (GtkPanedClass *class)
 163 {
 164   GObjectClass *object_class;
 165   GtkWidgetClass *widget_class;
 166   GtkContainerClass *container_class;
 167   GtkPanedClass *paned_class;
 168   GtkBindingSet *binding_set;
 169
 170   object_class = (GObjectClass *) class;
 171   widget_class = (GtkWidgetClass *) class;
 172   container_class = (GtkContainerClass *) class;
 173   paned_class = (GtkPanedClass *) class;
 174
 175   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
 176
 177   object_class->set_property = gtk_paned_set_property;
 178   object_class->get_property = gtk_paned_get_property;
 179
 180   widget_class->realize = gtk_paned_realize;
 181   widget_class->unrealize = gtk_paned_unrealize;
 182   widget_class->map = gtk_paned_map;
 183   widget_class->unmap = gtk_paned_unmap;
 184   widget_class->expose_event = gtk_paned_expose;
 185   widget_class->focus = gtk_paned_focus;
 186   widget_class->enter_notify_event = gtk_paned_enter;
 187   widget_class->leave_notify_event = gtk_paned_leave;
 188   widget_class->button_press_event = gtk_paned_button_press;
 189   widget_class->button_release_event = gtk_paned_button_release;
 190   widget_class->motion_notify_event = gtk_paned_motion;
 191
 192   container_class->add = gtk_paned_add;
 193   container_class->remove = gtk_paned_remove;
 194   container_class->forall = gtk_paned_forall;
 195   container_class->child_type = gtk_paned_child_type;
 196   container_class->set_focus_child = gtk_paned_set_focus_child;
 197
 198   paned_class->cycle_child_focus = gtk_paned_cycle_child_focus;
 199   paned_class->toggle_handle_focus = gtk_paned_toggle_handle_focus;
 200   paned_class->move_handle = gtk_paned_move_handle;
 201   paned_class->cycle_handle_focus = gtk_paned_cycle_handle_focus;
 202   paned_class->accept_position = gtk_paned_accept_position;
 203   paned_class->cancel_position = gtk_paned_cancel_position;
 204
 205   g_object_class_install_property (object_class,
 206                                    PROP_POSITION,
 207                                    g_param_spec_int ("position",
 208                                                      _("Position"),
 209                                                      _("Position of paned separator in pixels (0 means all the way to the left/top)"),
 210                                                      0,
 211                                                      G_MAXINT,
 212                                                      0,
 213                                                      G_PARAM_READABLE | G_PARAM_WRITABLE));
 214   g_object_class_install_property (object_class,
 215                                    PROP_POSITION_SET,
 216                                    g_param_spec_boolean ("position_set",
 217                                                          _("Position Set"),
 218                                                          _("TRUE if the Position property should be used"),
 219                                                          FALSE,
 220                                                          G_PARAM_READABLE | G_PARAM_WRITABLE));
 221
 222   gtk_widget_class_install_style_property (widget_class,
 223                                            g_param_spec_int ("handle_size",
 224                                                              _("Handle Size"),
 225                                                              _("Width of handle"),
 226                                                              0,
 227                                                              G_MAXINT,
 228                                                              5,
 229                                                              G_PARAM_READABLE));
 230
 231   signals [CYCLE_HANDLE_FOCUS] =
 232     g_signal_new ("cycle_child_focus",
 233                   G_TYPE_FROM_CLASS (object_class),
 234                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 235                   G_STRUCT_OFFSET (GtkPanedClass, cycle_child_focus),
 236                   NULL, NULL,
 237                   _gtk_marshal_BOOLEAN__BOOLEAN,
 238                   G_TYPE_BOOLEAN, 1,
 239                   G_TYPE_BOOLEAN);
 240
 241   signals [TOGGLE_HANDLE_FOCUS] =
 242     g_signal_new ("toggle_handle_focus",
 243                   G_TYPE_FROM_CLASS (object_class),
 244                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 245                   G_STRUCT_OFFSET (GtkPanedClass, toggle_handle_focus),
 246                   NULL, NULL,
 247                   _gtk_marshal_BOOLEAN__VOID,
 248                   G_TYPE_BOOLEAN, 0);
 249
 250   signals[MOVE_HANDLE] =
 251     g_signal_new ("move_handle",
 252                   G_TYPE_FROM_CLASS (object_class),
 253                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 254                   G_STRUCT_OFFSET (GtkPanedClass, move_handle),
 255                   NULL, NULL,
 256                   _gtk_marshal_BOOLEAN__ENUM,
 257                   G_TYPE_BOOLEAN, 1,
 258                   GTK_TYPE_SCROLL_TYPE);
 259
 260   signals [CYCLE_HANDLE_FOCUS] =
 261     g_signal_new ("cycle_handle_focus",
 262                   G_TYPE_FROM_CLASS (object_class),
 263                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 264                   G_STRUCT_OFFSET (GtkPanedClass, cycle_handle_focus),
 265                   NULL, NULL,
 266                   _gtk_marshal_BOOLEAN__BOOLEAN,
 267                   G_TYPE_BOOLEAN, 1,
 268                   G_TYPE_BOOLEAN);
 269
 270   signals [ACCEPT_POSITION] =
 271     g_signal_new ("accept_position",
 272                   G_TYPE_FROM_CLASS (object_class),
 273                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 274                   G_STRUCT_OFFSET (GtkPanedClass, accept_position),
 275                   NULL, NULL,
 276                   _gtk_marshal_BOOLEAN__VOID,
 277                   G_TYPE_BOOLEAN, 0);
 278
 279   signals [CANCEL_POSITION] =
 280     g_signal_new ("cancel_position",
 281                   G_TYPE_FROM_CLASS (object_class),
 282                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 283                   G_STRUCT_OFFSET (GtkPanedClass, cancel_position),
 284                   NULL, NULL,
 285                   _gtk_marshal_BOOLEAN__VOID,
 286                   G_TYPE_BOOLEAN, 0);
 287
 288   binding_set = gtk_binding_set_by_class (object_class);
 289
 290   /* F6 and friends */
 291   gtk_binding_entry_add_signal (binding_set,
 292                                 GDK_F6, 0,
 293                                 "cycle_child_focus", 1,
 294                                 G_TYPE_BOOLEAN, FALSE);
 295   gtk_binding_entry_add_signal (binding_set,
 296                                 GDK_F6, GDK_SHIFT_MASK,
 297                                 "cycle_child_focus", 1,
 298                                 G_TYPE_BOOLEAN, TRUE);
 299
 300   /* F8 and friends */
 301   gtk_binding_entry_add_signal (binding_set,
 302                                 GDK_F8, 0,
 303                                 "toggle_handle_focus", 0);
 304
 305   add_tab_bindings (binding_set, 0, GTK_DIR_TAB_FORWARD);
 306   add_tab_bindings (binding_set, GDK_CONTROL_MASK, GTK_DIR_TAB_FORWARD);
 307   add_tab_bindings (binding_set, GDK_SHIFT_MASK, GTK_DIR_TAB_BACKWARD);
 308   add_tab_bindings (binding_set, GDK_CONTROL_MASK | GDK_SHIFT_MASK, GTK_DIR_TAB_BACKWARD);
 309
 310   /* accept and cancel positions */
 311   gtk_binding_entry_add_signal (binding_set,
 312                                 GDK_Escape, 0,
 313                                 "cancel_position", 0);
 314
 315   gtk_binding_entry_add_signal (binding_set,
 316                                 GDK_Return, 0,
 317                                 "accept_position", 0);
 318   gtk_binding_entry_add_signal (binding_set,
 319                                 GDK_KP_Enter, 0,
 320                                 "accept_position", 0);
 321   gtk_binding_entry_add_signal (binding_set,
 322                                 GDK_space, 0,
 323                                 "accept_position", 0);
 324   gtk_binding_entry_add_signal (binding_set,
 325                                 GDK_KP_Space, 0,
 326                                 "accept_position", 0);
 327
 328   /* move handle */
 329   add_move_binding (binding_set, GDK_Left, 0, GTK_SCROLL_STEP_LEFT);
 330   add_move_binding (binding_set, GDK_KP_Left, 0, GTK_SCROLL_STEP_LEFT);
 331   add_move_binding (binding_set, GDK_Left, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_LEFT);
 332   add_move_binding (binding_set, GDK_KP_Left, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_LEFT);
 333
 334   add_move_binding (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_RIGHT);
 335   add_move_binding (binding_set, GDK_Right, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_RIGHT);
 336   add_move_binding (binding_set, GDK_KP_Right, 0, GTK_SCROLL_STEP_RIGHT);
 337   add_move_binding (binding_set, GDK_KP_Right, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_RIGHT);
 338
 339   add_move_binding (binding_set, GDK_Up, 0, GTK_SCROLL_STEP_UP);
 340   add_move_binding (binding_set, GDK_Up, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_UP);
 341   add_move_binding (binding_set, GDK_KP_Up, 0, GTK_SCROLL_STEP_UP);
 342   add_move_binding (binding_set, GDK_KP_Up, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_UP);
 343   add_move_binding (binding_set, GDK_Page_Up, 0, GTK_SCROLL_PAGE_UP);
 344   add_move_binding (binding_set, GDK_KP_Page_Up, 0, GTK_SCROLL_PAGE_UP);
 345
 346   add_move_binding (binding_set, GDK_Down, 0, GTK_SCROLL_STEP_DOWN);
 347   add_move_binding (binding_set, GDK_Down, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_DOWN);
 348   add_move_binding (binding_set, GDK_KP_Down, 0, GTK_SCROLL_STEP_DOWN);
 349   add_move_binding (binding_set, GDK_KP_Down, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_DOWN);
 350   add_move_binding (binding_set, GDK_Page_Down, 0, GTK_SCROLL_PAGE_RIGHT);
 351   add_move_binding (binding_set, GDK_KP_Page_Down, 0, GTK_SCROLL_PAGE_RIGHT);
 352
 353   add_move_binding (binding_set, GDK_Home, 0, GTK_SCROLL_START);
 354   add_move_binding (binding_set, GDK_KP_Home, 0, GTK_SCROLL_START);
 355   add_move_binding (binding_set, GDK_End, 0, GTK_SCROLL_END);
 356   add_move_binding (binding_set, GDK_KP_End, 0, GTK_SCROLL_END);
 357 }
 358
 359 static GtkType
 360 gtk_paned_child_type (GtkContainer *container)
 361 {
 362   if (!GTK_PANED (container)->child1 || !GTK_PANED (container)->child2)
 363     return GTK_TYPE_WIDGET;
 364   else
 365     return GTK_TYPE_NONE;
 366 }
 367
 368 static void
 369 gtk_paned_init (GtkPaned *paned)
 370 {
 371   GTK_WIDGET_SET_FLAGS (paned, GTK_NO_WINDOW | GTK_CAN_FOCUS);
 372
 373   paned->child1 = NULL;
 374   paned->child2 = NULL;
 375   paned->handle = NULL;
 376   paned->xor_gc = NULL;
 377   paned->cursor_type = GDK_CROSS;
 378
 379   paned->handle_pos.width = 5;
 380   paned->handle_pos.height = 5;
 381   paned->position_set = FALSE;
 382   paned->last_allocation = -1;
 383   paned->in_drag = FALSE;
 384
 385   paned->saved_focus = NULL;
 386   paned->last_child1_focus = NULL;
 387   paned->last_child2_focus = NULL;
 388   paned->in_recursion = FALSE;
 389   paned->handle_prelit = FALSE;
 390   paned->original_position = -1;
 391
 392   paned->handle_pos.x = -1;
 393   paned->handle_pos.y = -1;
 394
 395   paned->drag_pos = -1;
 396 }
 397
 398 static void
 399 gtk_paned_set_property (GObject        *object,
 400                         guint           prop_id,
 401                         const GValue   *value,
 402                         GParamSpec     *pspec)
 403 {
 404   GtkPaned *paned = GTK_PANED (object);
 405
 406   switch (prop_id)
 407     {
 408     case PROP_POSITION:
 409       gtk_paned_set_position (paned, g_value_get_int (value));
 410       break;
 411     case PROP_POSITION_SET:
 412       paned->position_set = g_value_get_boolean (value);
 413       gtk_widget_queue_resize (GTK_WIDGET (paned));
 414       break;
 415     default:
 416       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 417       break;
 418     }
 419 }
 420
 421 static void
 422 gtk_paned_get_property (GObject        *object,
 423                         guint           prop_id,
 424                         GValue         *value,
 425                         GParamSpec     *pspec)
 426 {
 427   GtkPaned *paned = GTK_PANED (object);
 428
 429   switch (prop_id)
 430     {
 431     case PROP_POSITION:
 432       g_value_set_int (value, paned->child1_size);
 433       break;
 434     case PROP_POSITION_SET:
 435       g_value_set_boolean (value, paned->position_set);
 436       break;
 437     default:
 438       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 439       break;
 440     }
 441 }
 442
 443 static void
 444 gtk_paned_realize (GtkWidget *widget)
 445 {
 446   GtkPaned *paned;
 447   GdkWindowAttr attributes;
 448   gint attributes_mask;
 449
 450   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 451   paned = GTK_PANED (widget);
 452
 453   widget->window = gtk_widget_get_parent_window (widget);
 454   gdk_window_ref (widget->window);
 455
 456   attributes.window_type = GDK_WINDOW_CHILD;
 457   attributes.wclass = GDK_INPUT_ONLY;
 458   attributes.x = paned->handle_pos.x;
 459   attributes.y = paned->handle_pos.y;
 460   attributes.width = paned->handle_pos.width;
 461   attributes.height = paned->handle_pos.height;
 462   attributes.cursor = gdk_cursor_new (paned->cursor_type);
 463   attributes.event_mask = gtk_widget_get_events (widget);
 464   attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
 465                             GDK_BUTTON_RELEASE_MASK |
 466                             GDK_ENTER_NOTIFY_MASK |
 467                             GDK_LEAVE_NOTIFY_MASK |
 468                             GDK_POINTER_MOTION_MASK |
 469                             GDK_POINTER_MOTION_HINT_MASK);
 470   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_CURSOR;
 471
 472   paned->handle = gdk_window_new (widget->window,
 473                                   &attributes, attributes_mask);
 474   gdk_window_set_user_data (paned->handle, paned);
 475   gdk_cursor_destroy (attributes.cursor);
 476
 477   widget->style = gtk_style_attach (widget->style, widget->window);
 478
 479   if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1) &&
 480       paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 481     gdk_window_show (paned->handle);
 482 }
 483
 484 static void
 485 gtk_paned_unrealize (GtkWidget *widget)
 486 {
 487   GtkPaned *paned = GTK_PANED (widget);
 488
 489   if (paned->xor_gc)
 490     {
 491       gdk_gc_destroy (paned->xor_gc);
 492       paned->xor_gc = NULL;
 493     }
 494
 495   if (paned->handle)
 496     {
 497       gdk_window_set_user_data (paned->handle, NULL);
 498       gdk_window_destroy (paned->handle);
 499       paned->handle = NULL;
 500     }
 501
 502   gtk_paned_set_last_child1_focus (paned, NULL);
 503   gtk_paned_set_last_child2_focus (paned, NULL);
 504   gtk_paned_set_saved_focus (paned, NULL);
 505
 506   if (GTK_WIDGET_CLASS (parent_class)->unrealize)
 507     (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 508 }
 509
 510 static void
 511 gtk_paned_map (GtkWidget *widget)
 512 {
 513   GtkPaned *paned = GTK_PANED (widget);
 514
 515   gdk_window_show (paned->handle);
 516
 517   GTK_WIDGET_CLASS (parent_class)->map (widget);
 518 }
 519
 520 static void
 521 gtk_paned_unmap (GtkWidget *widget)
 522 {
 523   GtkPaned *paned = GTK_PANED (widget);
 524
 525   gdk_window_hide (paned->handle);
 526
 527   GTK_WIDGET_CLASS (parent_class)->unmap (widget);
 528 }
 529
 530 static gboolean
 531 gtk_paned_expose (GtkWidget      *widget,
 532                   GdkEventExpose *event)
 533 {
 534   GtkPaned *paned = GTK_PANED (widget);
 535
 536   if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_MAPPED (widget) &&
 537       paned->child1 && GTK_WIDGET_VISIBLE (paned->child1) &&
 538       paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 539     {
 540       GdkRegion *region;
 541
 542       region = gdk_region_rectangle (&paned->handle_pos);
 543       gdk_region_intersect (region, event->region);
 544
 545       if (!gdk_region_empty (region))
 546         {
 547           GtkStateType state;
 548           GdkRectangle clip;
 549
 550           gdk_region_get_clipbox (region, &clip);
 551
 552           if (gtk_widget_is_focus (widget))
 553             state = GTK_STATE_SELECTED;
 554           else if (paned->handle_prelit)
 555             state = GTK_STATE_PRELIGHT;
 556           else
 557             state = GTK_WIDGET_STATE (widget);
 558
 559           gtk_paint_handle (widget->style, widget->window,
 560                             state, GTK_SHADOW_NONE,
 561                             &clip, widget, "paned",
 562                             paned->handle_pos.x, paned->handle_pos.y,
 563                             paned->handle_pos.width, paned->handle_pos.height,
 564                             paned->orientation);
 565         }
 566
 567       gdk_region_destroy (region);
 568     }
 569
 570   /* Chain up to draw children */
 571   GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
 572
 573   return FALSE;
 574 }
 575
 576 static void
 577 update_drag (GtkPaned *paned)
 578 {
 579   gint pos;
 580   gint handle_size;
 581   gint size;
 582
 583   if (paned->orientation == GTK_ORIENTATION_HORIZONTAL)
 584     gtk_widget_get_pointer (GTK_WIDGET (paned), NULL, &pos);
 585   else
 586     gtk_widget_get_pointer (GTK_WIDGET (paned), &pos, NULL);
 587
 588   gtk_widget_style_get (GTK_WIDGET (paned), "handle_size", &handle_size, NULL);
 589
 590   size = pos - GTK_CONTAINER (paned)->border_width - paned->drag_pos;
 591   size = CLAMP (size, paned->min_position, paned->max_position);
 592
 593   if (size != paned->child1_size)
 594     gtk_paned_set_position (paned, size);
 595 }
 596
 597 static gboolean
 598 gtk_paned_enter (GtkWidget        *widget,
 599                  GdkEventCrossing *event)
 600 {
 601   GtkPaned *paned = GTK_PANED (widget);
 602
 603   if (paned->in_drag)
 604     update_drag (paned);
 605   else
 606     {
 607       paned->handle_prelit = TRUE;
 608       gtk_widget_queue_draw_area (widget,
 609                                   paned->handle_pos.x,
 610                                   paned->handle_pos.y,
 611                                   paned->handle_pos.width,
 612                                   paned->handle_pos.height);
 613     }
 614
 615   return TRUE;
 616 }
 617
 618 static gboolean
 619 gtk_paned_leave (GtkWidget        *widget,
 620                  GdkEventCrossing *event)
 621 {
 622   GtkPaned *paned = GTK_PANED (widget);
 623
 624   if (paned->in_drag)
 625     update_drag (paned);
 626   else
 627     {
 628       paned->handle_prelit = FALSE;
 629       gtk_widget_queue_draw_area (widget,
 630                                   paned->handle_pos.x,
 631                                   paned->handle_pos.y,
 632                                   paned->handle_pos.width,
 633                                   paned->handle_pos.height);
 634     }
 635
 636   return TRUE;
 637 }
 638
 639 static gboolean
 640 gtk_paned_focus (GtkWidget        *widget,
 641                  GtkDirectionType  direction)
 642
 643 {
 644   gboolean retval;
 645
 646   /* This is a hack, but how can this be done without
 647    * excessive cut-and-paste from gtkcontainer.c?
 648    */
 649
 650   GTK_WIDGET_UNSET_FLAGS (widget, GTK_CAN_FOCUS);
 651   retval = (* GTK_WIDGET_CLASS (parent_class)->focus) (widget, direction);
 652   GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_FOCUS);
 653
 654   return retval;
 655 }
 656
 657 static gboolean
 658 gtk_paned_button_press (GtkWidget      *widget,
 659                         GdkEventButton *event)
 660 {
 661   GtkPaned *paned = GTK_PANED (widget);
 662
 663   if (!paned->in_drag &&
 664       (event->window == paned->handle) && (event->button == 1))
 665     {
 666       paned->in_drag = TRUE;
 667
 668       /* We need a server grab here, not gtk_grab_add(), since
 669        * we don't want to pass events on to the widget's children */
 670       gdk_pointer_grab (paned->handle, FALSE,
 671                         GDK_POINTER_MOTION_HINT_MASK
 672                         | GDK_BUTTON1_MOTION_MASK
 673                         | GDK_BUTTON_RELEASE_MASK
 674                         | GDK_ENTER_NOTIFY_MASK
 675                         | GDK_LEAVE_NOTIFY_MASK,
 676                         NULL, NULL,
 677                         event->time);
 678
 679       if (paned->orientation == GTK_ORIENTATION_HORIZONTAL)
 680         paned->drag_pos = event->y;
 681       else
 682         paned->drag_pos = event->x;
 683
 684       return TRUE;
 685     }
 686
 687   return FALSE;
 688 }
 689
 690 static gboolean
 691 gtk_paned_button_release (GtkWidget      *widget,
 692                           GdkEventButton *event)
 693 {
 694   GtkPaned *paned = GTK_PANED (widget);
 695
 696   if (paned->in_drag && (event->button == 1))
 697     {
 698       paned->in_drag = FALSE;
 699       paned->drag_pos = -1;
 700       paned->position_set = TRUE;
 701       gdk_pointer_ungrab (event->time);
 702
 703       return TRUE;
 704     }
 705
 706   return FALSE;
 707 }
 708
 709 static gboolean
 710 gtk_paned_motion (GtkWidget      *widget,
 711                   GdkEventMotion *event)
 712 {
 713   GtkPaned *paned = GTK_PANED (widget);
 714
 715   if (paned->in_drag)
 716     {
 717       update_drag (paned);
 718       return TRUE;
 719     }
 720
 721   return FALSE;
 722 }
 723
 724 void
 725 gtk_paned_add1 (GtkPaned  *paned,
 726                 GtkWidget *widget)
 727 {
 728   gtk_paned_pack1 (paned, widget, FALSE, TRUE);
 729 }
 730
 731 void
 732 gtk_paned_add2 (GtkPaned  *paned,
 733                 GtkWidget *widget)
 734 {
 735   gtk_paned_pack2 (paned, widget, TRUE, TRUE);
 736 }
 737
 738 void
 739 gtk_paned_pack1 (GtkPaned  *paned,
 740                  GtkWidget *child,
 741                  gboolean   resize,
 742                  gboolean   shrink)
 743 {
 744   g_return_if_fail (GTK_IS_PANED (paned));
 745   g_return_if_fail (GTK_IS_WIDGET (child));
 746
 747   if (!paned->child1)
 748     {
 749       paned->child1 = child;
 750       paned->child1_resize = resize;
 751       paned->child1_shrink = shrink;
 752
 753       gtk_widget_set_parent (child, GTK_WIDGET (paned));
 754     }
 755 }
 756
 757 void
 758 gtk_paned_pack2 (GtkPaned  *paned,
 759                  GtkWidget *child,
 760                  gboolean   resize,
 761                  gboolean   shrink)
 762 {
 763   g_return_if_fail (GTK_IS_PANED (paned));
 764   g_return_if_fail (GTK_IS_WIDGET (child));
 765
 766   if (!paned->child2)
 767     {
 768       paned->child2 = child;
 769       paned->child2_resize = resize;
 770       paned->child2_shrink = shrink;
 771
 772       gtk_widget_set_parent (child, GTK_WIDGET (paned));
 773     }
 774 }
 775
 776
 777 static void
 778 gtk_paned_add (GtkContainer *container,
 779                GtkWidget    *widget)
 780 {
 781   GtkPaned *paned;
 782
 783   g_return_if_fail (GTK_IS_PANED (container));
 784
 785   paned = GTK_PANED (container);
 786
 787   if (!paned->child1)
 788     gtk_paned_add1 (paned, widget);
 789   else if (!paned->child2)
 790     gtk_paned_add2 (paned, widget);
 791 }
 792
 793 static void
 794 gtk_paned_remove (GtkContainer *container,
 795                   GtkWidget    *widget)
 796 {
 797   GtkPaned *paned;
 798   gboolean was_visible;
 799
 800   paned = GTK_PANED (container);
 801   was_visible = GTK_WIDGET_VISIBLE (widget);
 802
 803   if (paned->child1 == widget)
 804     {
 805       gtk_widget_unparent (widget);
 806
 807       paned->child1 = NULL;
 808
 809       if (was_visible && GTK_WIDGET_VISIBLE (container))
 810         gtk_widget_queue_resize (GTK_WIDGET (container));
 811     }
 812   else if (paned->child2 == widget)
 813     {
 814       gtk_widget_unparent (widget);
 815
 816       paned->child2 = NULL;
 817
 818       if (was_visible && GTK_WIDGET_VISIBLE (container))
 819         gtk_widget_queue_resize (GTK_WIDGET (container));
 820     }
 821 }
 822
 823 static void
 824 gtk_paned_forall (GtkContainer *container,
 825                   gboolean      include_internals,
 826                   GtkCallback   callback,
 827                   gpointer      callback_data)
 828 {
 829   GtkPaned *paned;
 830
 831   g_return_if_fail (callback != NULL);
 832
 833   paned = GTK_PANED (container);
 834
 835   if (paned->child1)
 836     (*callback) (paned->child1, callback_data);
 837   if (paned->child2)
 838     (*callback) (paned->child2, callback_data);
 839 }
 840
 841 /**
 842  * gtk_paned_get_position:
 843  * @paned: a #GtkPaned widget
 844  *
 845  * Obtains the position of the divider between the two panes.
 846  *
 847  * Return value: position of the divider
 848  **/
 849 gint
 850 gtk_paned_get_position (GtkPaned  *paned)
 851 {
 852   g_return_val_if_fail (GTK_IS_PANED (paned), 0);
 853
 854   return paned->child1_size;
 855 }
 856
 857 /**
 858  * gtk_paned_set_position:
 859  * @paned: a #GtkPaned widget
 860  * @position: pixel position of divider, a negative value means that the position
 861  *            is unset.
 862  *
 863  * Sets the position of the divider between the two panes.
 864  **/
 865 void
 866 gtk_paned_set_position (GtkPaned *paned,
 867                         gint      position)
 868 {
 869   GObject *object;
 870
 871   g_return_if_fail (GTK_IS_PANED (paned));
 872
 873   object = G_OBJECT (paned);
 874
 875   if (position >= 0)
 876     {
 877       /* We don't clamp here - the assumption is that
 878        * if the total allocation changes at the same time
 879        * as the position, the position set is with reference
 880        * to the new total size. If only the position changes,
 881        * then clamping will occur in gtk_paned_compute_position()
 882        */
 883
 884       paned->child1_size = position;
 885       paned->position_set = TRUE;
 886     }
 887   else
 888     {
 889       paned->position_set = FALSE;
 890     }
 891
 892   g_object_freeze_notify (object);
 893   g_object_notify (object, "position");
 894   g_object_notify (object, "position_set");
 895   g_object_thaw_notify (object);
 896
 897   gtk_widget_queue_resize (GTK_WIDGET (paned));
 898 }
 899
 900 void
 901 gtk_paned_compute_position (GtkPaned *paned,
 902                             gint      allocation,
 903                             gint      child1_req,
 904                             gint      child2_req)
 905 {
 906   gint old_position;
 907
 908   g_return_if_fail (GTK_IS_PANED (paned));
 909
 910   old_position = paned->child1_size;
 911
 912   paned->min_position = paned->child1_shrink ? 0 : child1_req;
 913
 914   paned->max_position = allocation;
 915   if (!paned->child2_shrink)
 916     paned->max_position = MAX (1, paned->max_position - child2_req);
 917
 918   if (!paned->position_set)
 919     {
 920       if (paned->child1_resize && !paned->child2_resize)
 921         paned->child1_size = MAX (1, allocation - child2_req);
 922       else if (!paned->child1_resize && paned->child2_resize)
 923         paned->child1_size = child1_req;
 924       else if (child1_req + child2_req != 0)
 925         paned->child1_size = allocation * ((gdouble)child1_req / (child1_req + child2_req));
 926       else
 927         paned->child1_size = allocation * 0.5;
 928     }
 929   else
 930     {
 931       /* If the position was set before the initial allocation.
 932        * (paned->last_allocation <= 0) just clamp it and leave it.
 933        */
 934       if (paned->last_allocation > 0)
 935         {
 936           if (paned->child1_resize && !paned->child2_resize)
 937             paned->child1_size += allocation - paned->last_allocation;
 938           else if (!(!paned->child1_resize && paned->child2_resize))
 939             paned->child1_size = allocation * ((gdouble) paned->child1_size / (paned->last_allocation));
 940         }
 941     }
 942
 943   paned->child1_size = CLAMP (paned->child1_size,
 944                               paned->min_position,
 945                               paned->max_position);
 946
 947   if (paned->child1_size != old_position)
 948     g_object_notify (G_OBJECT (paned), "position");
 949
 950   paned->last_allocation = allocation;
 951 }
 952
 953 static void
 954 gtk_paned_set_saved_focus (GtkPaned *paned, GtkWidget *widget)
 955 {
 956   if (paned->saved_focus)
 957     g_object_remove_weak_pointer (G_OBJECT (paned->saved_focus),
 958                                   (gpointer *)&(paned->saved_focus));
 959
 960   paned->saved_focus = widget;
 961
 962   if (paned->saved_focus)
 963     g_object_add_weak_pointer (G_OBJECT (paned->saved_focus),
 964                                (gpointer *)&(paned->saved_focus));
 965 }
 966
 967 static void
 968 gtk_paned_set_last_child1_focus (GtkPaned *paned, GtkWidget *widget)
 969 {
 970   if (paned->last_child1_focus)
 971     g_object_remove_weak_pointer (G_OBJECT (paned->last_child1_focus),
 972                                   (gpointer *)&(paned->last_child1_focus));
 973
 974   paned->last_child1_focus = widget;
 975
 976   if (paned->last_child1_focus)
 977     g_object_add_weak_pointer (G_OBJECT (paned->last_child1_focus),
 978                                (gpointer *)&(paned->last_child1_focus));
 979 }
 980
 981 static void
 982 gtk_paned_set_last_child2_focus (GtkPaned *paned, GtkWidget *widget)
 983 {
 984   if (paned->last_child2_focus)
 985     g_object_remove_weak_pointer (G_OBJECT (paned->last_child2_focus),
 986                                   (gpointer *)&(paned->last_child2_focus));
 987
 988   paned->last_child2_focus = widget;
 989
 990   if (paned->last_child2_focus)
 991     g_object_add_weak_pointer (G_OBJECT (paned->last_child2_focus),
 992                                (gpointer *)&(paned->last_child2_focus));
 993 }
 994
 995 static GtkWidget *
 996 paned_get_focus_widget (GtkPaned *paned)
 997 {
 998   GtkWidget *toplevel;
 999
1000   toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
1001   if (GTK_WIDGET_TOPLEVEL (toplevel))
1002     return GTK_WINDOW (toplevel)->focus_widget;
1003
1004   return NULL;
1005 }
1006
1007 static void
1008 gtk_paned_set_focus_child (GtkContainer *container,
1009                            GtkWidget    *focus_child)
1010 {
1011   GtkPaned *paned;
1012
1013   g_return_if_fail (GTK_IS_PANED (container));
1014
1015   paned = GTK_PANED (container);
1016
1017   if (focus_child == NULL)
1018     {
1019       GtkWidget *last_focus;
1020       GtkWidget *w;
1021
1022       last_focus = paned_get_focus_widget (paned);
1023
1024       if (last_focus)
1025         {
1026           /* If there is one or more paned widgets between us and the
1027            * focus widget, we want the topmost of those as last_focus
1028            */
1029           for (w = last_focus; w != GTK_WIDGET (paned); w = w->parent)
1030             if (GTK_IS_PANED (w))
1031               last_focus = w;
1032
1033           if (container->focus_child == paned->child1)
1034             gtk_paned_set_last_child1_focus (paned, last_focus);
1035           else if (container->focus_child == paned->child2)
1036             gtk_paned_set_last_child2_focus (paned, last_focus);
1037         }
1038     }
1039
1040   if (parent_class->set_focus_child)
1041     (* parent_class->set_focus_child) (container, focus_child);
1042 }
1043
1044 static void
1045 gtk_paned_get_cycle_chain (GtkPaned          *paned,
1046                            GtkDirectionType   direction,
1047                            GList            **widgets)
1048 {
1049   GtkContainer *container = GTK_CONTAINER (paned);
1050   GtkWidget *ancestor = NULL;
1051   GList *temp_list = NULL;
1052   GList *list;
1053
1054   if (paned->in_recursion)
1055     return;
1056
1057   g_assert (widgets != NULL);
1058
1059   if (paned->last_child1_focus &&
1060       !gtk_widget_is_ancestor (paned->last_child1_focus, GTK_WIDGET (paned)))
1061     {
1062       gtk_paned_set_last_child1_focus (paned, NULL);
1063     }
1064
1065   if (paned->last_child2_focus &&
1066       !gtk_widget_is_ancestor (paned->last_child2_focus, GTK_WIDGET (paned)))
1067     {
1068       gtk_paned_set_last_child2_focus (paned, NULL);
1069     }
1070
1071   if (GTK_WIDGET (paned)->parent)
1072     ancestor = gtk_widget_get_ancestor (GTK_WIDGET (paned)->parent, GTK_TYPE_PANED);
1073
1074   /* The idea here is that temp_list is a list of widgets we want to cycle
1075    * to. The list is prioritized so that the first element is our first
1076    * choice, the next our second, and so on.
1077    *
1078    * We can't just use g_list_reverse(), because we want to try
1079    * paned->last_child?_focus before paned->child?, both when we
1080    * are going forward and backward.
1081    */
1082   if (direction == GTK_DIR_TAB_FORWARD)
1083     {
1084       if (container->focus_child == paned->child1)
1085         {
1086           temp_list = g_list_append (temp_list, paned->last_child2_focus);
1087           temp_list = g_list_append (temp_list, paned->child2);
1088           temp_list = g_list_append (temp_list, ancestor);
1089         }
1090       else if (container->focus_child == paned->child2)
1091         {
1092           temp_list = g_list_append (temp_list, ancestor);
1093           temp_list = g_list_append (temp_list, paned->last_child1_focus);
1094           temp_list = g_list_append (temp_list, paned->child1);
1095         }
1096       else
1097         {
1098           temp_list = g_list_append (temp_list, paned->last_child1_focus);
1099           temp_list = g_list_append (temp_list, paned->child1);
1100           temp_list = g_list_append (temp_list, paned->last_child2_focus);
1101           temp_list = g_list_append (temp_list, paned->child2);
1102           temp_list = g_list_append (temp_list, ancestor);
1103         }
1104     }
1105   else
1106     {
1107       if (container->focus_child == paned->child1)
1108         {
1109           temp_list = g_list_append (temp_list, ancestor);
1110           temp_list = g_list_append (temp_list, paned->last_child2_focus);
1111           temp_list = g_list_append (temp_list, paned->child2);
1112         }
1113       else if (container->focus_child == paned->child2)
1114         {
1115           temp_list = g_list_append (temp_list, paned->last_child1_focus);
1116           temp_list = g_list_append (temp_list, paned->child1);
1117           temp_list = g_list_append (temp_list, ancestor);
1118         }
1119       else
1120         {
1121           temp_list = g_list_append (temp_list, paned->last_child2_focus);
1122           temp_list = g_list_append (temp_list, paned->child2);
1123           temp_list = g_list_append (temp_list, paned->last_child1_focus);
1124           temp_list = g_list_append (temp_list, paned->child1);
1125           temp_list = g_list_append (temp_list, ancestor);
1126         }
1127     }
1128
1129   /* Walk through the list and expand all the paned widgets. */
1130   for (list = temp_list; list != NULL; list = list->next)
1131     {
1132       GtkWidget *widget = list->data;
1133
1134       if (widget)
1135         {
1136           if (GTK_IS_PANED (widget))
1137             {
1138               paned->in_recursion = TRUE;
1139               gtk_paned_get_cycle_chain (GTK_PANED (widget), direction, widgets);
1140               paned->in_recursion = FALSE;
1141             }
1142           else
1143             {
1144               *widgets = g_list_append (*widgets, widget);
1145             }
1146         }
1147     }
1148
1149   g_list_free (temp_list);
1150 }
1151
1152 static gboolean
1153 gtk_paned_cycle_child_focus (GtkPaned *paned,
1154                              gboolean  reversed)
1155 {
1156   GList *cycle_chain = NULL;
1157   GList *list;
1158
1159   GtkDirectionType direction = reversed? GTK_DIR_TAB_BACKWARD : GTK_DIR_TAB_FORWARD;
1160
1161   /* ignore f6 if the handle is focused */
1162   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1163     return TRUE;
1164
1165   /* we can't just let the event propagate up the hierarchy,
1166    * because the paned will want to cycle focus _unless_ an
1167    * ancestor paned handles the event
1168    */
1169   gtk_paned_get_cycle_chain (paned, direction, &cycle_chain);
1170
1171   for (list = cycle_chain; list != NULL; list = list->next)
1172     if (gtk_widget_child_focus (GTK_WIDGET (list->data), direction))
1173       break;
1174
1175   g_list_free (cycle_chain);
1176
1177   return TRUE;
1178 }
1179
1180 static void
1181 get_child_panes (GtkWidget  *widget,
1182                  GList     **panes)
1183 {
1184   if (GTK_IS_PANED (widget))
1185     {
1186       GtkPaned *paned = GTK_PANED (widget);
1187
1188       get_child_panes (paned->child1, panes);
1189       *panes = g_list_prepend (*panes, widget);
1190       get_child_panes (paned->child2, panes);
1191     }
1192   else if (GTK_IS_CONTAINER (widget))
1193     {
1194       gtk_container_foreach (GTK_CONTAINER (widget),
1195                              (GtkCallback)get_child_panes, panes);
1196     }
1197 }
1198
1199 static GList *
1200 get_all_panes (GtkPaned *paned)
1201 {
1202   GtkPaned *topmost = NULL;
1203   GList *result = NULL;
1204   GtkWidget *w;
1205
1206   for (w = GTK_WIDGET (paned); w != NULL; w = w->parent)
1207     {
1208       if (GTK_IS_PANED (w))
1209         topmost = GTK_PANED (w);
1210     }
1211
1212   g_assert (topmost);
1213
1214   get_child_panes (GTK_WIDGET (topmost), &result);
1215
1216   return g_list_reverse (result);
1217 }
1218
1219 static void
1220 gtk_paned_find_neighbours (GtkPaned  *paned,
1221                            GtkPaned **next,
1222                            GtkPaned **prev)
1223 {
1224   GList *all_panes = get_all_panes (paned);
1225   GList *this_link;
1226
1227   g_assert (all_panes);
1228
1229   this_link = g_list_find (all_panes, paned);
1230
1231   g_assert (this_link);
1232
1233   if (this_link->next)
1234     *next = this_link->next->data;
1235   else
1236     *next = all_panes->data;
1237
1238   if (this_link->prev)
1239     *prev = this_link->prev->data;
1240   else
1241     *prev = g_list_last (all_panes)->data;
1242
1243   if (*next == paned)
1244     *next = NULL;
1245
1246   if (*prev == paned)
1247     *prev = NULL;
1248
1249   g_list_free (all_panes);
1250 }
1251
1252 static gboolean
1253 gtk_paned_move_handle (GtkPaned      *paned,
1254                        GtkScrollType  scroll)
1255 {
1256   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1257     {
1258       gint old_position;
1259       gint new_position;
1260
1261       enum {
1262         SINGLE_STEP_SIZE = 1,
1263         PAGE_STEP_SIZE   = 75
1264       };
1265
1266       old_position = gtk_paned_get_position (paned);
1267
1268       switch (scroll)
1269         {
1270         case GTK_SCROLL_STEP_LEFT:
1271         case GTK_SCROLL_STEP_UP:
1272         case GTK_SCROLL_STEP_BACKWARD:
1273           new_position = old_position - SINGLE_STEP_SIZE;
1274           break;
1275
1276         case GTK_SCROLL_STEP_RIGHT:
1277         case GTK_SCROLL_STEP_DOWN:
1278         case GTK_SCROLL_STEP_FORWARD:
1279           new_position = old_position + SINGLE_STEP_SIZE;
1280           break;
1281
1282         case GTK_SCROLL_PAGE_LEFT:
1283         case GTK_SCROLL_PAGE_UP:
1284         case GTK_SCROLL_PAGE_BACKWARD:
1285           new_position = old_position - PAGE_STEP_SIZE;
1286           break;
1287
1288         case GTK_SCROLL_PAGE_RIGHT:
1289         case GTK_SCROLL_PAGE_DOWN:
1290         case GTK_SCROLL_PAGE_FORWARD:
1291           new_position = old_position + PAGE_STEP_SIZE;
1292           break;
1293
1294         case GTK_SCROLL_START:
1295           new_position = paned->min_position;
1296           break;
1297
1298         case GTK_SCROLL_END:
1299           new_position = paned->max_position;
1300           break;
1301
1302         default:
1303           new_position = old_position;
1304           break;
1305         }
1306
1307       new_position = CLAMP (new_position, paned->min_position, paned->max_position);
1308
1309       if (old_position != new_position)
1310         gtk_paned_set_position (paned, new_position);
1311
1312       return TRUE;
1313     }
1314
1315   return FALSE;
1316 }
1317
1318 static void
1319 gtk_paned_restore_focus (GtkPaned *paned)
1320 {
1321   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1322     {
1323       if (paned->saved_focus && GTK_WIDGET_SENSITIVE (paned->saved_focus))
1324         {
1325           gtk_widget_grab_focus (paned->saved_focus);
1326         }
1327       else
1328         {
1329           /* the saved focus is somehow not available for focusing,
1330            * try
1331            *   1) tabbing into the paned widget
1332            * if that didn't work,
1333            *   2) unset focus for the window if there is one
1334            */
1335
1336           if (!gtk_widget_child_focus (GTK_WIDGET (paned), GTK_DIR_TAB_FORWARD))
1337             {
1338               GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
1339
1340               if (GTK_IS_WINDOW (toplevel))
1341                 gtk_window_set_focus (GTK_WINDOW (toplevel), NULL);
1342             }
1343         }
1344
1345       gtk_paned_set_saved_focus (paned, NULL);
1346     }
1347 }
1348
1349 static gboolean
1350 gtk_paned_accept_position (GtkPaned *paned)
1351 {
1352   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1353     {
1354       paned->original_position = -1;
1355       gtk_paned_restore_focus (paned);
1356
1357       return TRUE;
1358     }
1359
1360   return FALSE;
1361 }
1362
1363
1364 static gboolean
1365 gtk_paned_cancel_position (GtkPaned *paned)
1366 {
1367   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1368     {
1369       if (paned->original_position != -1)
1370         {
1371           gtk_paned_set_position (paned, paned->original_position);
1372           paned->original_position = -1;
1373         }
1374
1375       gtk_paned_restore_focus (paned);
1376       return TRUE;
1377     }
1378
1379   return FALSE;
1380 }
1381
1382 static gboolean
1383 gtk_paned_cycle_handle_focus (GtkPaned *paned,
1384                               gboolean  reversed)
1385 {
1386   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1387     {
1388       GtkPaned *next, *prev;
1389       GtkPaned *focus = NULL;
1390
1391       gtk_paned_find_neighbours (paned, &next, &prev);
1392
1393       if (reversed && prev)
1394         focus = prev;
1395       else if (!reversed && next)
1396         focus = next;
1397
1398       if (focus)
1399         {
1400           gtk_paned_set_saved_focus (focus, paned->saved_focus);
1401           gtk_paned_set_saved_focus (paned, NULL);
1402           gtk_widget_grab_focus (GTK_WIDGET (focus));
1403
1404           if (!gtk_widget_is_focus (GTK_WIDGET (paned)))
1405             {
1406               paned->original_position = -1;
1407               focus->original_position = gtk_paned_get_position (focus);
1408             }
1409         }
1410
1411       return TRUE;
1412     }
1413
1414   return FALSE;
1415 }
1416
1417 static gboolean
1418 gtk_paned_toggle_handle_focus (GtkPaned *paned)
1419 {
1420   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1421     {
1422       gtk_paned_accept_position (paned);
1423     }
1424   else
1425     {
1426       GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
1427
1428       if (GTK_IS_WINDOW (toplevel))
1429         gtk_paned_set_saved_focus (paned, GTK_WINDOW (toplevel)->focus_widget);
1430
1431       gtk_widget_grab_focus (GTK_WIDGET (paned));
1432       paned->original_position = gtk_paned_get_position (paned);
1433     }
1434
1435   return TRUE;
1436 }