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_for_display (gtk_widget_get_display (widget),
 463                                                   paned->cursor_type);
 464   attributes.event_mask = gtk_widget_get_events (widget);
 465   attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
 466                             GDK_BUTTON_RELEASE_MASK |
 467                             GDK_ENTER_NOTIFY_MASK |
 468                             GDK_LEAVE_NOTIFY_MASK |
 469                             GDK_POINTER_MOTION_MASK |
 470                             GDK_POINTER_MOTION_HINT_MASK);
 471   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_CURSOR;
 472
 473   paned->handle = gdk_window_new (widget->window,
 474                                   &attributes, attributes_mask);
 475   gdk_window_set_user_data (paned->handle, paned);
 476   gdk_cursor_destroy (attributes.cursor);
 477
 478   widget->style = gtk_style_attach (widget->style, widget->window);
 479
 480   if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1) &&
 481       paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 482     gdk_window_show (paned->handle);
 483 }
 484
 485 static void
 486 gtk_paned_unrealize (GtkWidget *widget)
 487 {
 488   GtkPaned *paned = GTK_PANED (widget);
 489
 490   if (paned->xor_gc)
 491     {
 492       gdk_gc_destroy (paned->xor_gc);
 493       paned->xor_gc = NULL;
 494     }
 495
 496   if (paned->handle)
 497     {
 498       gdk_window_set_user_data (paned->handle, NULL);
 499       gdk_window_destroy (paned->handle);
 500       paned->handle = NULL;
 501     }
 502
 503   gtk_paned_set_last_child1_focus (paned, NULL);
 504   gtk_paned_set_last_child2_focus (paned, NULL);
 505   gtk_paned_set_saved_focus (paned, NULL);
 506
 507   if (GTK_WIDGET_CLASS (parent_class)->unrealize)
 508     (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 509 }
 510
 511 static void
 512 gtk_paned_map (GtkWidget *widget)
 513 {
 514   GtkPaned *paned = GTK_PANED (widget);
 515
 516   gdk_window_show (paned->handle);
 517
 518   GTK_WIDGET_CLASS (parent_class)->map (widget);
 519 }
 520
 521 static void
 522 gtk_paned_unmap (GtkWidget *widget)
 523 {
 524   GtkPaned *paned = GTK_PANED (widget);
 525
 526   gdk_window_hide (paned->handle);
 527
 528   GTK_WIDGET_CLASS (parent_class)->unmap (widget);
 529 }
 530
 531 static gboolean
 532 gtk_paned_expose (GtkWidget      *widget,
 533                   GdkEventExpose *event)
 534 {
 535   GtkPaned *paned = GTK_PANED (widget);
 536
 537   if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_MAPPED (widget) &&
 538       paned->child1 && GTK_WIDGET_VISIBLE (paned->child1) &&
 539       paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 540     {
 541       GdkRegion *region;
 542
 543       region = gdk_region_rectangle (&paned->handle_pos);
 544       gdk_region_intersect (region, event->region);
 545
 546       if (!gdk_region_empty (region))
 547         {
 548           GtkStateType state;
 549           GdkRectangle clip;
 550
 551           gdk_region_get_clipbox (region, &clip);
 552
 553           if (gtk_widget_is_focus (widget))
 554             state = GTK_STATE_SELECTED;
 555           else if (paned->handle_prelit)
 556             state = GTK_STATE_PRELIGHT;
 557           else
 558             state = GTK_WIDGET_STATE (widget);
 559
 560           gtk_paint_handle (widget->style, widget->window,
 561                             state, GTK_SHADOW_NONE,
 562                             &clip, widget, "paned",
 563                             paned->handle_pos.x, paned->handle_pos.y,
 564                             paned->handle_pos.width, paned->handle_pos.height,
 565                             paned->orientation);
 566         }
 567
 568       gdk_region_destroy (region);
 569     }
 570
 571   /* Chain up to draw children */
 572   GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
 573
 574   return FALSE;
 575 }
 576
 577 static void
 578 update_drag (GtkPaned *paned)
 579 {
 580   gint pos;
 581   gint handle_size;
 582   gint size;
 583
 584   if (paned->orientation == GTK_ORIENTATION_HORIZONTAL)
 585     gtk_widget_get_pointer (GTK_WIDGET (paned), NULL, &pos);
 586   else
 587     gtk_widget_get_pointer (GTK_WIDGET (paned), &pos, NULL);
 588
 589   gtk_widget_style_get (GTK_WIDGET (paned), "handle_size", &handle_size, NULL);
 590
 591   size = pos - GTK_CONTAINER (paned)->border_width - paned->drag_pos;
 592   size = CLAMP (size, paned->min_position, paned->max_position);
 593
 594   if (size != paned->child1_size)
 595     gtk_paned_set_position (paned, size);
 596 }
 597
 598 static gboolean
 599 gtk_paned_enter (GtkWidget        *widget,
 600                  GdkEventCrossing *event)
 601 {
 602   GtkPaned *paned = GTK_PANED (widget);
 603
 604   if (paned->in_drag)
 605     update_drag (paned);
 606   else
 607     {
 608       paned->handle_prelit = TRUE;
 609       gtk_widget_queue_draw_area (widget,
 610                                   paned->handle_pos.x,
 611                                   paned->handle_pos.y,
 612                                   paned->handle_pos.width,
 613                                   paned->handle_pos.height);
 614     }
 615
 616   return TRUE;
 617 }
 618
 619 static gboolean
 620 gtk_paned_leave (GtkWidget        *widget,
 621                  GdkEventCrossing *event)
 622 {
 623   GtkPaned *paned = GTK_PANED (widget);
 624
 625   if (paned->in_drag)
 626     update_drag (paned);
 627   else
 628     {
 629       paned->handle_prelit = FALSE;
 630       gtk_widget_queue_draw_area (widget,
 631                                   paned->handle_pos.x,
 632                                   paned->handle_pos.y,
 633                                   paned->handle_pos.width,
 634                                   paned->handle_pos.height);
 635     }
 636
 637   return TRUE;
 638 }
 639
 640 static gboolean
 641 gtk_paned_focus (GtkWidget        *widget,
 642                  GtkDirectionType  direction)
 643
 644 {
 645   gboolean retval;
 646
 647   /* This is a hack, but how can this be done without
 648    * excessive cut-and-paste from gtkcontainer.c?
 649    */
 650
 651   GTK_WIDGET_UNSET_FLAGS (widget, GTK_CAN_FOCUS);
 652   retval = (* GTK_WIDGET_CLASS (parent_class)->focus) (widget, direction);
 653   GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_FOCUS);
 654
 655   return retval;
 656 }
 657
 658 static gboolean
 659 gtk_paned_button_press (GtkWidget      *widget,
 660                         GdkEventButton *event)
 661 {
 662   GtkPaned *paned = GTK_PANED (widget);
 663
 664   if (!paned->in_drag &&
 665       (event->window == paned->handle) && (event->button == 1))
 666     {
 667       paned->in_drag = TRUE;
 668
 669       /* We need a server grab here, not gtk_grab_add(), since
 670        * we don't want to pass events on to the widget's children */
 671       gdk_pointer_grab (paned->handle, FALSE,
 672                         GDK_POINTER_MOTION_HINT_MASK
 673                         | GDK_BUTTON1_MOTION_MASK
 674                         | GDK_BUTTON_RELEASE_MASK
 675                         | GDK_ENTER_NOTIFY_MASK
 676                         | GDK_LEAVE_NOTIFY_MASK,
 677                         NULL, NULL,
 678                         event->time);
 679
 680       if (paned->orientation == GTK_ORIENTATION_HORIZONTAL)
 681         paned->drag_pos = event->y;
 682       else
 683         paned->drag_pos = event->x;
 684
 685       return TRUE;
 686     }
 687
 688   return FALSE;
 689 }
 690
 691 static gboolean
 692 gtk_paned_button_release (GtkWidget      *widget,
 693                           GdkEventButton *event)
 694 {
 695   GtkPaned *paned = GTK_PANED (widget);
 696
 697   if (paned->in_drag && (event->button == 1))
 698     {
 699       paned->in_drag = FALSE;
 700       paned->drag_pos = -1;
 701       paned->position_set = TRUE;
 702       gdk_display_pointer_ungrab (gtk_widget_get_display (widget),
 703                                   event->time);
 704       return TRUE;
 705     }
 706
 707   return FALSE;
 708 }
 709
 710 static gboolean
 711 gtk_paned_motion (GtkWidget      *widget,
 712                   GdkEventMotion *event)
 713 {
 714   GtkPaned *paned = GTK_PANED (widget);
 715
 716   if (paned->in_drag)
 717     {
 718       update_drag (paned);
 719       return TRUE;
 720     }
 721
 722   return FALSE;
 723 }
 724
 725 void
 726 gtk_paned_add1 (GtkPaned  *paned,
 727                 GtkWidget *widget)
 728 {
 729   gtk_paned_pack1 (paned, widget, FALSE, TRUE);
 730 }
 731
 732 void
 733 gtk_paned_add2 (GtkPaned  *paned,
 734                 GtkWidget *widget)
 735 {
 736   gtk_paned_pack2 (paned, widget, TRUE, TRUE);
 737 }
 738
 739 void
 740 gtk_paned_pack1 (GtkPaned  *paned,
 741                  GtkWidget *child,
 742                  gboolean   resize,
 743                  gboolean   shrink)
 744 {
 745   g_return_if_fail (GTK_IS_PANED (paned));
 746   g_return_if_fail (GTK_IS_WIDGET (child));
 747
 748   if (!paned->child1)
 749     {
 750       paned->child1 = child;
 751       paned->child1_resize = resize;
 752       paned->child1_shrink = shrink;
 753
 754       gtk_widget_set_parent (child, GTK_WIDGET (paned));
 755     }
 756 }
 757
 758 void
 759 gtk_paned_pack2 (GtkPaned  *paned,
 760                  GtkWidget *child,
 761                  gboolean   resize,
 762                  gboolean   shrink)
 763 {
 764   g_return_if_fail (GTK_IS_PANED (paned));
 765   g_return_if_fail (GTK_IS_WIDGET (child));
 766
 767   if (!paned->child2)
 768     {
 769       paned->child2 = child;
 770       paned->child2_resize = resize;
 771       paned->child2_shrink = shrink;
 772
 773       gtk_widget_set_parent (child, GTK_WIDGET (paned));
 774     }
 775 }
 776
 777
 778 static void
 779 gtk_paned_add (GtkContainer *container,
 780                GtkWidget    *widget)
 781 {
 782   GtkPaned *paned;
 783
 784   g_return_if_fail (GTK_IS_PANED (container));
 785
 786   paned = GTK_PANED (container);
 787
 788   if (!paned->child1)
 789     gtk_paned_add1 (paned, widget);
 790   else if (!paned->child2)
 791     gtk_paned_add2 (paned, widget);
 792 }
 793
 794 static void
 795 gtk_paned_remove (GtkContainer *container,
 796                   GtkWidget    *widget)
 797 {
 798   GtkPaned *paned;
 799   gboolean was_visible;
 800
 801   paned = GTK_PANED (container);
 802   was_visible = GTK_WIDGET_VISIBLE (widget);
 803
 804   if (paned->child1 == widget)
 805     {
 806       gtk_widget_unparent (widget);
 807
 808       paned->child1 = NULL;
 809
 810       if (was_visible && GTK_WIDGET_VISIBLE (container))
 811         gtk_widget_queue_resize (GTK_WIDGET (container));
 812     }
 813   else if (paned->child2 == widget)
 814     {
 815       gtk_widget_unparent (widget);
 816
 817       paned->child2 = NULL;
 818
 819       if (was_visible && GTK_WIDGET_VISIBLE (container))
 820         gtk_widget_queue_resize (GTK_WIDGET (container));
 821     }
 822 }
 823
 824 static void
 825 gtk_paned_forall (GtkContainer *container,
 826                   gboolean      include_internals,
 827                   GtkCallback   callback,
 828                   gpointer      callback_data)
 829 {
 830   GtkPaned *paned;
 831
 832   g_return_if_fail (callback != NULL);
 833
 834   paned = GTK_PANED (container);
 835
 836   if (paned->child1)
 837     (*callback) (paned->child1, callback_data);
 838   if (paned->child2)
 839     (*callback) (paned->child2, callback_data);
 840 }
 841
 842 /**
 843  * gtk_paned_get_position:
 844  * @paned: a #GtkPaned widget
 845  *
 846  * Obtains the position of the divider between the two panes.
 847  *
 848  * Return value: position of the divider
 849  **/
 850 gint
 851 gtk_paned_get_position (GtkPaned  *paned)
 852 {
 853   g_return_val_if_fail (GTK_IS_PANED (paned), 0);
 854
 855   return paned->child1_size;
 856 }
 857
 858 /**
 859  * gtk_paned_set_position:
 860  * @paned: a #GtkPaned widget
 861  * @position: pixel position of divider, a negative value means that the position
 862  *            is unset.
 863  *
 864  * Sets the position of the divider between the two panes.
 865  **/
 866 void
 867 gtk_paned_set_position (GtkPaned *paned,
 868                         gint      position)
 869 {
 870   GObject *object;
 871
 872   g_return_if_fail (GTK_IS_PANED (paned));
 873
 874   object = G_OBJECT (paned);
 875
 876   if (position >= 0)
 877     {
 878       /* We don't clamp here - the assumption is that
 879        * if the total allocation changes at the same time
 880        * as the position, the position set is with reference
 881        * to the new total size. If only the position changes,
 882        * then clamping will occur in gtk_paned_compute_position()
 883        */
 884
 885       paned->child1_size = position;
 886       paned->position_set = TRUE;
 887     }
 888   else
 889     {
 890       paned->position_set = FALSE;
 891     }
 892
 893   g_object_freeze_notify (object);
 894   g_object_notify (object, "position");
 895   g_object_notify (object, "position_set");
 896   g_object_thaw_notify (object);
 897
 898   gtk_widget_queue_resize (GTK_WIDGET (paned));
 899 }
 900
 901 void
 902 gtk_paned_compute_position (GtkPaned *paned,
 903                             gint      allocation,
 904                             gint      child1_req,
 905                             gint      child2_req)
 906 {
 907   gint old_position;
 908
 909   g_return_if_fail (GTK_IS_PANED (paned));
 910
 911   old_position = paned->child1_size;
 912
 913   paned->min_position = paned->child1_shrink ? 0 : child1_req;
 914
 915   paned->max_position = allocation;
 916   if (!paned->child2_shrink)
 917     paned->max_position = MAX (1, paned->max_position - child2_req);
 918
 919   if (!paned->position_set)
 920     {
 921       if (paned->child1_resize && !paned->child2_resize)
 922         paned->child1_size = MAX (1, allocation - child2_req);
 923       else if (!paned->child1_resize && paned->child2_resize)
 924         paned->child1_size = child1_req;
 925       else if (child1_req + child2_req != 0)
 926         paned->child1_size = allocation * ((gdouble)child1_req / (child1_req + child2_req));
 927       else
 928         paned->child1_size = allocation * 0.5;
 929     }
 930   else
 931     {
 932       /* If the position was set before the initial allocation.
 933        * (paned->last_allocation <= 0) just clamp it and leave it.
 934        */
 935       if (paned->last_allocation > 0)
 936         {
 937           if (paned->child1_resize && !paned->child2_resize)
 938             paned->child1_size += allocation - paned->last_allocation;
 939           else if (!(!paned->child1_resize && paned->child2_resize))
 940             paned->child1_size = allocation * ((gdouble) paned->child1_size / (paned->last_allocation));
 941         }
 942     }
 943
 944   paned->child1_size = CLAMP (paned->child1_size,
 945                               paned->min_position,
 946                               paned->max_position);
 947
 948   if (paned->child1_size != old_position)
 949     g_object_notify (G_OBJECT (paned), "position");
 950
 951   paned->last_allocation = allocation;
 952 }
 953
 954 static void
 955 gtk_paned_set_saved_focus (GtkPaned *paned, GtkWidget *widget)
 956 {
 957   if (paned->saved_focus)
 958     g_object_remove_weak_pointer (G_OBJECT (paned->saved_focus),
 959                                   (gpointer *)&(paned->saved_focus));
 960
 961   paned->saved_focus = widget;
 962
 963   if (paned->saved_focus)
 964     g_object_add_weak_pointer (G_OBJECT (paned->saved_focus),
 965                                (gpointer *)&(paned->saved_focus));
 966 }
 967
 968 static void
 969 gtk_paned_set_last_child1_focus (GtkPaned *paned, GtkWidget *widget)
 970 {
 971   if (paned->last_child1_focus)
 972     g_object_remove_weak_pointer (G_OBJECT (paned->last_child1_focus),
 973                                   (gpointer *)&(paned->last_child1_focus));
 974
 975   paned->last_child1_focus = widget;
 976
 977   if (paned->last_child1_focus)
 978     g_object_add_weak_pointer (G_OBJECT (paned->last_child1_focus),
 979                                (gpointer *)&(paned->last_child1_focus));
 980 }
 981
 982 static void
 983 gtk_paned_set_last_child2_focus (GtkPaned *paned, GtkWidget *widget)
 984 {
 985   if (paned->last_child2_focus)
 986     g_object_remove_weak_pointer (G_OBJECT (paned->last_child2_focus),
 987                                   (gpointer *)&(paned->last_child2_focus));
 988
 989   paned->last_child2_focus = widget;
 990
 991   if (paned->last_child2_focus)
 992     g_object_add_weak_pointer (G_OBJECT (paned->last_child2_focus),
 993                                (gpointer *)&(paned->last_child2_focus));
 994 }
 995
 996 static GtkWidget *
 997 paned_get_focus_widget (GtkPaned *paned)
 998 {
 999   GtkWidget *toplevel;
1000
1001   toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
1002   if (GTK_WIDGET_TOPLEVEL (toplevel))
1003     return GTK_WINDOW (toplevel)->focus_widget;
1004
1005   return NULL;
1006 }
1007
1008 static void
1009 gtk_paned_set_focus_child (GtkContainer *container,
1010                            GtkWidget    *focus_child)
1011 {
1012   GtkPaned *paned;
1013
1014   g_return_if_fail (GTK_IS_PANED (container));
1015
1016   paned = GTK_PANED (container);
1017
1018   if (focus_child == NULL)
1019     {
1020       GtkWidget *last_focus;
1021       GtkWidget *w;
1022
1023       last_focus = paned_get_focus_widget (paned);
1024
1025       if (last_focus)
1026         {
1027           /* If there is one or more paned widgets between us and the
1028            * focus widget, we want the topmost of those as last_focus
1029            */
1030           for (w = last_focus; w != GTK_WIDGET (paned); w = w->parent)
1031             if (GTK_IS_PANED (w))
1032               last_focus = w;
1033
1034           if (container->focus_child == paned->child1)
1035             gtk_paned_set_last_child1_focus (paned, last_focus);
1036           else if (container->focus_child == paned->child2)
1037             gtk_paned_set_last_child2_focus (paned, last_focus);
1038         }
1039     }
1040
1041   if (parent_class->set_focus_child)
1042     (* parent_class->set_focus_child) (container, focus_child);
1043 }
1044
1045 static void
1046 gtk_paned_get_cycle_chain (GtkPaned          *paned,
1047                            GtkDirectionType   direction,
1048                            GList            **widgets)
1049 {
1050   GtkContainer *container = GTK_CONTAINER (paned);
1051   GtkWidget *ancestor = NULL;
1052   GList *temp_list = NULL;
1053   GList *list;
1054
1055   if (paned->in_recursion)
1056     return;
1057
1058   g_assert (widgets != NULL);
1059
1060   if (paned->last_child1_focus &&
1061       !gtk_widget_is_ancestor (paned->last_child1_focus, GTK_WIDGET (paned)))
1062     {
1063       gtk_paned_set_last_child1_focus (paned, NULL);
1064     }
1065
1066   if (paned->last_child2_focus &&
1067       !gtk_widget_is_ancestor (paned->last_child2_focus, GTK_WIDGET (paned)))
1068     {
1069       gtk_paned_set_last_child2_focus (paned, NULL);
1070     }
1071
1072   if (GTK_WIDGET (paned)->parent)
1073     ancestor = gtk_widget_get_ancestor (GTK_WIDGET (paned)->parent, GTK_TYPE_PANED);
1074
1075   /* The idea here is that temp_list is a list of widgets we want to cycle
1076    * to. The list is prioritized so that the first element is our first
1077    * choice, the next our second, and so on.
1078    *
1079    * We can't just use g_list_reverse(), because we want to try
1080    * paned->last_child?_focus before paned->child?, both when we
1081    * are going forward and backward.
1082    */
1083   if (direction == GTK_DIR_TAB_FORWARD)
1084     {
1085       if (container->focus_child == paned->child1)
1086         {
1087           temp_list = g_list_append (temp_list, paned->last_child2_focus);
1088           temp_list = g_list_append (temp_list, paned->child2);
1089           temp_list = g_list_append (temp_list, ancestor);
1090         }
1091       else if (container->focus_child == paned->child2)
1092         {
1093           temp_list = g_list_append (temp_list, ancestor);
1094           temp_list = g_list_append (temp_list, paned->last_child1_focus);
1095           temp_list = g_list_append (temp_list, paned->child1);
1096         }
1097       else
1098         {
1099           temp_list = g_list_append (temp_list, paned->last_child1_focus);
1100           temp_list = g_list_append (temp_list, paned->child1);
1101           temp_list = g_list_append (temp_list, paned->last_child2_focus);
1102           temp_list = g_list_append (temp_list, paned->child2);
1103           temp_list = g_list_append (temp_list, ancestor);
1104         }
1105     }
1106   else
1107     {
1108       if (container->focus_child == paned->child1)
1109         {
1110           temp_list = g_list_append (temp_list, ancestor);
1111           temp_list = g_list_append (temp_list, paned->last_child2_focus);
1112           temp_list = g_list_append (temp_list, paned->child2);
1113         }
1114       else if (container->focus_child == paned->child2)
1115         {
1116           temp_list = g_list_append (temp_list, paned->last_child1_focus);
1117           temp_list = g_list_append (temp_list, paned->child1);
1118           temp_list = g_list_append (temp_list, ancestor);
1119         }
1120       else
1121         {
1122           temp_list = g_list_append (temp_list, paned->last_child2_focus);
1123           temp_list = g_list_append (temp_list, paned->child2);
1124           temp_list = g_list_append (temp_list, paned->last_child1_focus);
1125           temp_list = g_list_append (temp_list, paned->child1);
1126           temp_list = g_list_append (temp_list, ancestor);
1127         }
1128     }
1129
1130   /* Walk through the list and expand all the paned widgets. */
1131   for (list = temp_list; list != NULL; list = list->next)
1132     {
1133       GtkWidget *widget = list->data;
1134
1135       if (widget)
1136         {
1137           if (GTK_IS_PANED (widget))
1138             {
1139               paned->in_recursion = TRUE;
1140               gtk_paned_get_cycle_chain (GTK_PANED (widget), direction, widgets);
1141               paned->in_recursion = FALSE;
1142             }
1143           else
1144             {
1145               *widgets = g_list_append (*widgets, widget);
1146             }
1147         }
1148     }
1149
1150   g_list_free (temp_list);
1151 }
1152
1153 static gboolean
1154 gtk_paned_cycle_child_focus (GtkPaned *paned,
1155                              gboolean  reversed)
1156 {
1157   GList *cycle_chain = NULL;
1158   GList *list;
1159
1160   GtkDirectionType direction = reversed? GTK_DIR_TAB_BACKWARD : GTK_DIR_TAB_FORWARD;
1161
1162   /* ignore f6 if the handle is focused */
1163   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1164     return TRUE;
1165
1166   /* we can't just let the event propagate up the hierarchy,
1167    * because the paned will want to cycle focus _unless_ an
1168    * ancestor paned handles the event
1169    */
1170   gtk_paned_get_cycle_chain (paned, direction, &cycle_chain);
1171
1172   for (list = cycle_chain; list != NULL; list = list->next)
1173     if (gtk_widget_child_focus (GTK_WIDGET (list->data), direction))
1174       break;
1175
1176   g_list_free (cycle_chain);
1177
1178   return TRUE;
1179 }
1180
1181 static void
1182 get_child_panes (GtkWidget  *widget,
1183                  GList     **panes)
1184 {
1185   if (GTK_IS_PANED (widget))
1186     {
1187       GtkPaned *paned = GTK_PANED (widget);
1188
1189       get_child_panes (paned->child1, panes);
1190       *panes = g_list_prepend (*panes, widget);
1191       get_child_panes (paned->child2, panes);
1192     }
1193   else if (GTK_IS_CONTAINER (widget))
1194     {
1195       gtk_container_foreach (GTK_CONTAINER (widget),
1196                              (GtkCallback)get_child_panes, panes);
1197     }
1198 }
1199
1200 static GList *
1201 get_all_panes (GtkPaned *paned)
1202 {
1203   GtkPaned *topmost = NULL;
1204   GList *result = NULL;
1205   GtkWidget *w;
1206
1207   for (w = GTK_WIDGET (paned); w != NULL; w = w->parent)
1208     {
1209       if (GTK_IS_PANED (w))
1210         topmost = GTK_PANED (w);
1211     }
1212
1213   g_assert (topmost);
1214
1215   get_child_panes (GTK_WIDGET (topmost), &result);
1216
1217   return g_list_reverse (result);
1218 }
1219
1220 static void
1221 gtk_paned_find_neighbours (GtkPaned  *paned,
1222                            GtkPaned **next,
1223                            GtkPaned **prev)
1224 {
1225   GList *all_panes = get_all_panes (paned);
1226   GList *this_link;
1227
1228   g_assert (all_panes);
1229
1230   this_link = g_list_find (all_panes, paned);
1231
1232   g_assert (this_link);
1233
1234   if (this_link->next)
1235     *next = this_link->next->data;
1236   else
1237     *next = all_panes->data;
1238
1239   if (this_link->prev)
1240     *prev = this_link->prev->data;
1241   else
1242     *prev = g_list_last (all_panes)->data;
1243
1244   if (*next == paned)
1245     *next = NULL;
1246
1247   if (*prev == paned)
1248     *prev = NULL;
1249
1250   g_list_free (all_panes);
1251 }
1252
1253 static gboolean
1254 gtk_paned_move_handle (GtkPaned      *paned,
1255                        GtkScrollType  scroll)
1256 {
1257   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1258     {
1259       gint old_position;
1260       gint new_position;
1261
1262       enum {
1263         SINGLE_STEP_SIZE = 1,
1264         PAGE_STEP_SIZE   = 75
1265       };
1266
1267       old_position = gtk_paned_get_position (paned);
1268
1269       switch (scroll)
1270         {
1271         case GTK_SCROLL_STEP_LEFT:
1272         case GTK_SCROLL_STEP_UP:
1273         case GTK_SCROLL_STEP_BACKWARD:
1274           new_position = old_position - SINGLE_STEP_SIZE;
1275           break;
1276
1277         case GTK_SCROLL_STEP_RIGHT:
1278         case GTK_SCROLL_STEP_DOWN:
1279         case GTK_SCROLL_STEP_FORWARD:
1280           new_position = old_position + SINGLE_STEP_SIZE;
1281           break;
1282
1283         case GTK_SCROLL_PAGE_LEFT:
1284         case GTK_SCROLL_PAGE_UP:
1285         case GTK_SCROLL_PAGE_BACKWARD:
1286           new_position = old_position - PAGE_STEP_SIZE;
1287           break;
1288
1289         case GTK_SCROLL_PAGE_RIGHT:
1290         case GTK_SCROLL_PAGE_DOWN:
1291         case GTK_SCROLL_PAGE_FORWARD:
1292           new_position = old_position + PAGE_STEP_SIZE;
1293           break;
1294
1295         case GTK_SCROLL_START:
1296           new_position = paned->min_position;
1297           break;
1298
1299         case GTK_SCROLL_END:
1300           new_position = paned->max_position;
1301           break;
1302
1303         default:
1304           new_position = old_position;
1305           break;
1306         }
1307
1308       new_position = CLAMP (new_position, paned->min_position, paned->max_position);
1309
1310       if (old_position != new_position)
1311         gtk_paned_set_position (paned, new_position);
1312
1313       return TRUE;
1314     }
1315
1316   return FALSE;
1317 }
1318
1319 static void
1320 gtk_paned_restore_focus (GtkPaned *paned)
1321 {
1322   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1323     {
1324       if (paned->saved_focus && GTK_WIDGET_SENSITIVE (paned->saved_focus))
1325         {
1326           gtk_widget_grab_focus (paned->saved_focus);
1327         }
1328       else
1329         {
1330           /* the saved focus is somehow not available for focusing,
1331            * try
1332            *   1) tabbing into the paned widget
1333            * if that didn't work,
1334            *   2) unset focus for the window if there is one
1335            */
1336
1337           if (!gtk_widget_child_focus (GTK_WIDGET (paned), GTK_DIR_TAB_FORWARD))
1338             {
1339               GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
1340
1341               if (GTK_IS_WINDOW (toplevel))
1342                 gtk_window_set_focus (GTK_WINDOW (toplevel), NULL);
1343             }
1344         }
1345
1346       gtk_paned_set_saved_focus (paned, NULL);
1347     }
1348 }
1349
1350 static gboolean
1351 gtk_paned_accept_position (GtkPaned *paned)
1352 {
1353   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1354     {
1355       paned->original_position = -1;
1356       gtk_paned_restore_focus (paned);
1357
1358       return TRUE;
1359     }
1360
1361   return FALSE;
1362 }
1363
1364
1365 static gboolean
1366 gtk_paned_cancel_position (GtkPaned *paned)
1367 {
1368   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1369     {
1370       if (paned->original_position != -1)
1371         {
1372           gtk_paned_set_position (paned, paned->original_position);
1373           paned->original_position = -1;
1374         }
1375
1376       gtk_paned_restore_focus (paned);
1377       return TRUE;
1378     }
1379
1380   return FALSE;
1381 }
1382
1383 static gboolean
1384 gtk_paned_cycle_handle_focus (GtkPaned *paned,
1385                               gboolean  reversed)
1386 {
1387   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1388     {
1389       GtkPaned *next, *prev;
1390       GtkPaned *focus = NULL;
1391
1392       gtk_paned_find_neighbours (paned, &next, &prev);
1393
1394       if (reversed && prev)
1395         focus = prev;
1396       else if (!reversed && next)
1397         focus = next;
1398
1399       if (focus)
1400         {
1401           gtk_paned_set_saved_focus (focus, paned->saved_focus);
1402           gtk_paned_set_saved_focus (paned, NULL);
1403           gtk_widget_grab_focus (GTK_WIDGET (focus));
1404
1405           if (!gtk_widget_is_focus (GTK_WIDGET (paned)))
1406             {
1407               paned->original_position = -1;
1408               focus->original_position = gtk_paned_get_position (focus);
1409             }
1410         }
1411
1412       return TRUE;
1413     }
1414
1415   return FALSE;
1416 }
1417
1418 static gboolean
1419 gtk_paned_toggle_handle_focus (GtkPaned *paned)
1420 {
1421   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1422     {
1423       gtk_paned_accept_position (paned);
1424     }
1425   else
1426     {
1427       GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
1428
1429       if (GTK_IS_WINDOW (toplevel))
1430         gtk_paned_set_saved_focus (paned, GTK_WINDOW (toplevel)->focus_widget);
1431
1432       gtk_widget_grab_focus (GTK_WIDGET (paned));
1433       paned->original_position = gtk_paned_get_position (paned);
1434     }
1435
1436   return TRUE;
1437 }