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 GTypeInfo paned_info =
 118       {
 119         sizeof (GtkPanedClass),
 120         NULL,            /* base_init */
 121         NULL,            /* base_finalize */
 122         (GClassInitFunc) gtk_paned_class_init,
 123         NULL,            /* class_finalize */
 124         NULL,            /* class_data */
 125         sizeof (GtkPaned),
 126         0,               /* n_preallocs */
 127         (GInstanceInitFunc) gtk_paned_init,
 128         NULL,            /* value_table */
 129       };
 130
 131       paned_type = g_type_register_static (GTK_TYPE_CONTAINER, "GtkPaned",
 132                                            &paned_info, G_TYPE_FLAG_ABSTRACT);
 133     }
 134
 135   return paned_type;
 136 }
 137
 138 static guint signals[LAST_SIGNAL] = { 0 };
 139
 140 static void
 141 add_tab_bindings (GtkBindingSet    *binding_set,
 142                   GdkModifierType   modifiers,
 143                   gboolean          reverse)
 144 {
 145   gtk_binding_entry_add_signal (binding_set, GDK_Tab, modifiers,
 146                                 "cycle_handle_focus", 1,
 147                                 G_TYPE_BOOLEAN, reverse);
 148   gtk_binding_entry_add_signal (binding_set, GDK_KP_Tab, modifiers,
 149                                 "cycle_handle_focus", 1,
 150                                 G_TYPE_BOOLEAN, reverse);
 151 }
 152
 153 static void
 154 add_move_binding (GtkBindingSet   *binding_set,
 155                   guint            keyval,
 156                   GdkModifierType  mask,
 157                   GtkScrollType    scroll)
 158 {
 159   gtk_binding_entry_add_signal (binding_set, keyval, mask,
 160                                 "move_handle", 1,
 161                                 GTK_TYPE_SCROLL_TYPE, scroll);
 162 }
 163
 164 static void
 165 gtk_paned_class_init (GtkPanedClass *class)
 166 {
 167   GObjectClass *object_class;
 168   GtkWidgetClass *widget_class;
 169   GtkContainerClass *container_class;
 170   GtkPanedClass *paned_class;
 171   GtkBindingSet *binding_set;
 172
 173   object_class = (GObjectClass *) class;
 174   widget_class = (GtkWidgetClass *) class;
 175   container_class = (GtkContainerClass *) class;
 176   paned_class = (GtkPanedClass *) class;
 177
 178   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
 179
 180   object_class->set_property = gtk_paned_set_property;
 181   object_class->get_property = gtk_paned_get_property;
 182
 183   widget_class->realize = gtk_paned_realize;
 184   widget_class->unrealize = gtk_paned_unrealize;
 185   widget_class->map = gtk_paned_map;
 186   widget_class->unmap = gtk_paned_unmap;
 187   widget_class->expose_event = gtk_paned_expose;
 188   widget_class->focus = gtk_paned_focus;
 189   widget_class->enter_notify_event = gtk_paned_enter;
 190   widget_class->leave_notify_event = gtk_paned_leave;
 191   widget_class->button_press_event = gtk_paned_button_press;
 192   widget_class->button_release_event = gtk_paned_button_release;
 193   widget_class->motion_notify_event = gtk_paned_motion;
 194
 195   container_class->add = gtk_paned_add;
 196   container_class->remove = gtk_paned_remove;
 197   container_class->forall = gtk_paned_forall;
 198   container_class->child_type = gtk_paned_child_type;
 199   container_class->set_focus_child = gtk_paned_set_focus_child;
 200
 201   paned_class->cycle_child_focus = gtk_paned_cycle_child_focus;
 202   paned_class->toggle_handle_focus = gtk_paned_toggle_handle_focus;
 203   paned_class->move_handle = gtk_paned_move_handle;
 204   paned_class->cycle_handle_focus = gtk_paned_cycle_handle_focus;
 205   paned_class->accept_position = gtk_paned_accept_position;
 206   paned_class->cancel_position = gtk_paned_cancel_position;
 207
 208   g_object_class_install_property (object_class,
 209                                    PROP_POSITION,
 210                                    g_param_spec_int ("position",
 211                                                      _("Position"),
 212                                                      _("Position of paned separator in pixels (0 means all the way to the left/top)"),
 213                                                      0,
 214                                                      G_MAXINT,
 215                                                      0,
 216                                                      G_PARAM_READABLE | G_PARAM_WRITABLE));
 217   g_object_class_install_property (object_class,
 218                                    PROP_POSITION_SET,
 219                                    g_param_spec_boolean ("position_set",
 220                                                          _("Position Set"),
 221                                                          _("TRUE if the Position property should be used"),
 222                                                          FALSE,
 223                                                          G_PARAM_READABLE | G_PARAM_WRITABLE));
 224
 225   gtk_widget_class_install_style_property (widget_class,
 226                                            g_param_spec_int ("handle_size",
 227                                                              _("Handle Size"),
 228                                                              _("Width of handle"),
 229                                                              0,
 230                                                              G_MAXINT,
 231                                                              5,
 232                                                              G_PARAM_READABLE));
 233
 234   signals [CYCLE_HANDLE_FOCUS] =
 235     g_signal_new ("cycle_child_focus",
 236                   G_TYPE_FROM_CLASS (object_class),
 237                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 238                   G_STRUCT_OFFSET (GtkPanedClass, cycle_child_focus),
 239                   NULL, NULL,
 240                   _gtk_marshal_BOOLEAN__BOOLEAN,
 241                   G_TYPE_BOOLEAN, 1,
 242                   G_TYPE_BOOLEAN);
 243
 244   signals [TOGGLE_HANDLE_FOCUS] =
 245     g_signal_new ("toggle_handle_focus",
 246                   G_TYPE_FROM_CLASS (object_class),
 247                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 248                   G_STRUCT_OFFSET (GtkPanedClass, toggle_handle_focus),
 249                   NULL, NULL,
 250                   _gtk_marshal_BOOLEAN__VOID,
 251                   G_TYPE_BOOLEAN, 0);
 252
 253   signals[MOVE_HANDLE] =
 254     g_signal_new ("move_handle",
 255                   G_TYPE_FROM_CLASS (object_class),
 256                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 257                   G_STRUCT_OFFSET (GtkPanedClass, move_handle),
 258                   NULL, NULL,
 259                   _gtk_marshal_BOOLEAN__ENUM,
 260                   G_TYPE_BOOLEAN, 1,
 261                   GTK_TYPE_SCROLL_TYPE);
 262
 263   signals [CYCLE_HANDLE_FOCUS] =
 264     g_signal_new ("cycle_handle_focus",
 265                   G_TYPE_FROM_CLASS (object_class),
 266                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 267                   G_STRUCT_OFFSET (GtkPanedClass, cycle_handle_focus),
 268                   NULL, NULL,
 269                   _gtk_marshal_BOOLEAN__BOOLEAN,
 270                   G_TYPE_BOOLEAN, 1,
 271                   G_TYPE_BOOLEAN);
 272
 273   signals [ACCEPT_POSITION] =
 274     g_signal_new ("accept_position",
 275                   G_TYPE_FROM_CLASS (object_class),
 276                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 277                   G_STRUCT_OFFSET (GtkPanedClass, accept_position),
 278                   NULL, NULL,
 279                   _gtk_marshal_BOOLEAN__VOID,
 280                   G_TYPE_BOOLEAN, 0);
 281
 282   signals [CANCEL_POSITION] =
 283     g_signal_new ("cancel_position",
 284                   G_TYPE_FROM_CLASS (object_class),
 285                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 286                   G_STRUCT_OFFSET (GtkPanedClass, cancel_position),
 287                   NULL, NULL,
 288                   _gtk_marshal_BOOLEAN__VOID,
 289                   G_TYPE_BOOLEAN, 0);
 290
 291   binding_set = gtk_binding_set_by_class (object_class);
 292
 293   /* F6 and friends */
 294   gtk_binding_entry_add_signal (binding_set,
 295                                 GDK_F6, 0,
 296                                 "cycle_child_focus", 1,
 297                                 G_TYPE_BOOLEAN, FALSE);
 298   gtk_binding_entry_add_signal (binding_set,
 299                                 GDK_F6, GDK_SHIFT_MASK,
 300                                 "cycle_child_focus", 1,
 301                                 G_TYPE_BOOLEAN, TRUE);
 302
 303   /* F8 and friends */
 304   gtk_binding_entry_add_signal (binding_set,
 305                                 GDK_F8, 0,
 306                                 "toggle_handle_focus", 0);
 307
 308   add_tab_bindings (binding_set, 0, GTK_DIR_TAB_FORWARD);
 309   add_tab_bindings (binding_set, GDK_CONTROL_MASK, GTK_DIR_TAB_FORWARD);
 310   add_tab_bindings (binding_set, GDK_SHIFT_MASK, GTK_DIR_TAB_BACKWARD);
 311   add_tab_bindings (binding_set, GDK_CONTROL_MASK | GDK_SHIFT_MASK, GTK_DIR_TAB_BACKWARD);
 312
 313   /* accept and cancel positions */
 314   gtk_binding_entry_add_signal (binding_set,
 315                                 GDK_Escape, 0,
 316                                 "cancel_position", 0);
 317
 318   gtk_binding_entry_add_signal (binding_set,
 319                                 GDK_Return, 0,
 320                                 "accept_position", 0);
 321   gtk_binding_entry_add_signal (binding_set,
 322                                 GDK_KP_Enter, 0,
 323                                 "accept_position", 0);
 324   gtk_binding_entry_add_signal (binding_set,
 325                                 GDK_space, 0,
 326                                 "accept_position", 0);
 327   gtk_binding_entry_add_signal (binding_set,
 328                                 GDK_KP_Space, 0,
 329                                 "accept_position", 0);
 330
 331   /* move handle */
 332   add_move_binding (binding_set, GDK_Left, 0, GTK_SCROLL_STEP_LEFT);
 333   add_move_binding (binding_set, GDK_KP_Left, 0, GTK_SCROLL_STEP_LEFT);
 334   add_move_binding (binding_set, GDK_Left, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_LEFT);
 335   add_move_binding (binding_set, GDK_KP_Left, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_LEFT);
 336
 337   add_move_binding (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_RIGHT);
 338   add_move_binding (binding_set, GDK_Right, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_RIGHT);
 339   add_move_binding (binding_set, GDK_KP_Right, 0, GTK_SCROLL_STEP_RIGHT);
 340   add_move_binding (binding_set, GDK_KP_Right, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_RIGHT);
 341
 342   add_move_binding (binding_set, GDK_Up, 0, GTK_SCROLL_STEP_UP);
 343   add_move_binding (binding_set, GDK_Up, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_UP);
 344   add_move_binding (binding_set, GDK_KP_Up, 0, GTK_SCROLL_STEP_UP);
 345   add_move_binding (binding_set, GDK_KP_Up, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_UP);
 346   add_move_binding (binding_set, GDK_Page_Up, 0, GTK_SCROLL_PAGE_UP);
 347   add_move_binding (binding_set, GDK_KP_Page_Up, 0, GTK_SCROLL_PAGE_UP);
 348
 349   add_move_binding (binding_set, GDK_Down, 0, GTK_SCROLL_STEP_DOWN);
 350   add_move_binding (binding_set, GDK_Down, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_DOWN);
 351   add_move_binding (binding_set, GDK_KP_Down, 0, GTK_SCROLL_STEP_DOWN);
 352   add_move_binding (binding_set, GDK_KP_Down, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_DOWN);
 353   add_move_binding (binding_set, GDK_Page_Down, 0, GTK_SCROLL_PAGE_RIGHT);
 354   add_move_binding (binding_set, GDK_KP_Page_Down, 0, GTK_SCROLL_PAGE_RIGHT);
 355
 356   add_move_binding (binding_set, GDK_Home, 0, GTK_SCROLL_START);
 357   add_move_binding (binding_set, GDK_KP_Home, 0, GTK_SCROLL_START);
 358   add_move_binding (binding_set, GDK_End, 0, GTK_SCROLL_END);
 359   add_move_binding (binding_set, GDK_KP_End, 0, GTK_SCROLL_END);
 360 }
 361
 362 static GtkType
 363 gtk_paned_child_type (GtkContainer *container)
 364 {
 365   if (!GTK_PANED (container)->child1 || !GTK_PANED (container)->child2)
 366     return GTK_TYPE_WIDGET;
 367   else
 368     return GTK_TYPE_NONE;
 369 }
 370
 371 static void
 372 gtk_paned_init (GtkPaned *paned)
 373 {
 374   GTK_WIDGET_SET_FLAGS (paned, GTK_NO_WINDOW | GTK_CAN_FOCUS);
 375
 376   paned->child1 = NULL;
 377   paned->child2 = NULL;
 378   paned->handle = NULL;
 379   paned->xor_gc = NULL;
 380   paned->cursor_type = GDK_CROSS;
 381
 382   paned->handle_pos.width = 5;
 383   paned->handle_pos.height = 5;
 384   paned->position_set = FALSE;
 385   paned->last_allocation = -1;
 386   paned->in_drag = FALSE;
 387
 388   paned->saved_focus = NULL;
 389   paned->last_child1_focus = NULL;
 390   paned->last_child2_focus = NULL;
 391   paned->in_recursion = FALSE;
 392   paned->handle_prelit = FALSE;
 393   paned->original_position = -1;
 394
 395   paned->handle_pos.x = -1;
 396   paned->handle_pos.y = -1;
 397
 398   paned->drag_pos = -1;
 399 }
 400
 401 static void
 402 gtk_paned_set_property (GObject        *object,
 403                         guint           prop_id,
 404                         const GValue   *value,
 405                         GParamSpec     *pspec)
 406 {
 407   GtkPaned *paned = GTK_PANED (object);
 408
 409   switch (prop_id)
 410     {
 411     case PROP_POSITION:
 412       gtk_paned_set_position (paned, g_value_get_int (value));
 413       break;
 414     case PROP_POSITION_SET:
 415       paned->position_set = g_value_get_boolean (value);
 416       gtk_widget_queue_resize (GTK_WIDGET (paned));
 417       break;
 418     default:
 419       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 420       break;
 421     }
 422 }
 423
 424 static void
 425 gtk_paned_get_property (GObject        *object,
 426                         guint           prop_id,
 427                         GValue         *value,
 428                         GParamSpec     *pspec)
 429 {
 430   GtkPaned *paned = GTK_PANED (object);
 431
 432   switch (prop_id)
 433     {
 434     case PROP_POSITION:
 435       g_value_set_int (value, paned->child1_size);
 436       break;
 437     case PROP_POSITION_SET:
 438       g_value_set_boolean (value, paned->position_set);
 439       break;
 440     default:
 441       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 442       break;
 443     }
 444 }
 445
 446 static void
 447 gtk_paned_realize (GtkWidget *widget)
 448 {
 449   GtkPaned *paned;
 450   GdkWindowAttr attributes;
 451   gint attributes_mask;
 452
 453   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 454   paned = GTK_PANED (widget);
 455
 456   widget->window = gtk_widget_get_parent_window (widget);
 457   gdk_window_ref (widget->window);
 458
 459   attributes.window_type = GDK_WINDOW_CHILD;
 460   attributes.wclass = GDK_INPUT_ONLY;
 461   attributes.x = paned->handle_pos.x;
 462   attributes.y = paned->handle_pos.y;
 463   attributes.width = paned->handle_pos.width;
 464   attributes.height = paned->handle_pos.height;
 465   attributes.cursor = gdk_cursor_new_for_display (gtk_widget_get_display (widget),
 466                                                   paned->cursor_type);
 467   attributes.event_mask = gtk_widget_get_events (widget);
 468   attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
 469                             GDK_BUTTON_RELEASE_MASK |
 470                             GDK_ENTER_NOTIFY_MASK |
 471                             GDK_LEAVE_NOTIFY_MASK |
 472                             GDK_POINTER_MOTION_MASK |
 473                             GDK_POINTER_MOTION_HINT_MASK);
 474   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_CURSOR;
 475
 476   paned->handle = gdk_window_new (widget->window,
 477                                   &attributes, attributes_mask);
 478   gdk_window_set_user_data (paned->handle, paned);
 479   gdk_cursor_destroy (attributes.cursor);
 480
 481   widget->style = gtk_style_attach (widget->style, widget->window);
 482
 483   if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1) &&
 484       paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 485     gdk_window_show (paned->handle);
 486 }
 487
 488 static void
 489 gtk_paned_unrealize (GtkWidget *widget)
 490 {
 491   GtkPaned *paned = GTK_PANED (widget);
 492
 493   if (paned->xor_gc)
 494     {
 495       gdk_gc_destroy (paned->xor_gc);
 496       paned->xor_gc = NULL;
 497     }
 498
 499   if (paned->handle)
 500     {
 501       gdk_window_set_user_data (paned->handle, NULL);
 502       gdk_window_destroy (paned->handle);
 503       paned->handle = NULL;
 504     }
 505
 506   gtk_paned_set_last_child1_focus (paned, NULL);
 507   gtk_paned_set_last_child2_focus (paned, NULL);
 508   gtk_paned_set_saved_focus (paned, NULL);
 509
 510   if (GTK_WIDGET_CLASS (parent_class)->unrealize)
 511     (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 512 }
 513
 514 static void
 515 gtk_paned_map (GtkWidget *widget)
 516 {
 517   GtkPaned *paned = GTK_PANED (widget);
 518
 519   gdk_window_show (paned->handle);
 520
 521   GTK_WIDGET_CLASS (parent_class)->map (widget);
 522 }
 523
 524 static void
 525 gtk_paned_unmap (GtkWidget *widget)
 526 {
 527   GtkPaned *paned = GTK_PANED (widget);
 528
 529   gdk_window_hide (paned->handle);
 530
 531   GTK_WIDGET_CLASS (parent_class)->unmap (widget);
 532 }
 533
 534 static gboolean
 535 gtk_paned_expose (GtkWidget      *widget,
 536                   GdkEventExpose *event)
 537 {
 538   GtkPaned *paned = GTK_PANED (widget);
 539
 540   if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_MAPPED (widget) &&
 541       paned->child1 && GTK_WIDGET_VISIBLE (paned->child1) &&
 542       paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 543     {
 544       GdkRegion *region;
 545
 546       region = gdk_region_rectangle (&paned->handle_pos);
 547       gdk_region_intersect (region, event->region);
 548
 549       if (!gdk_region_empty (region))
 550         {
 551           GtkStateType state;
 552           GdkRectangle clip;
 553
 554           gdk_region_get_clipbox (region, &clip);
 555
 556           if (gtk_widget_is_focus (widget))
 557             state = GTK_STATE_SELECTED;
 558           else if (paned->handle_prelit)
 559             state = GTK_STATE_PRELIGHT;
 560           else
 561             state = GTK_WIDGET_STATE (widget);
 562
 563           gtk_paint_handle (widget->style, widget->window,
 564                             state, GTK_SHADOW_NONE,
 565                             &clip, widget, "paned",
 566                             paned->handle_pos.x, paned->handle_pos.y,
 567                             paned->handle_pos.width, paned->handle_pos.height,
 568                             paned->orientation);
 569         }
 570
 571       gdk_region_destroy (region);
 572     }
 573
 574   /* Chain up to draw children */
 575   GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
 576
 577   return FALSE;
 578 }
 579
 580 static void
 581 update_drag (GtkPaned *paned)
 582 {
 583   gint pos;
 584   gint handle_size;
 585   gint size;
 586
 587   if (paned->orientation == GTK_ORIENTATION_HORIZONTAL)
 588     gtk_widget_get_pointer (GTK_WIDGET (paned), NULL, &pos);
 589   else
 590     gtk_widget_get_pointer (GTK_WIDGET (paned), &pos, NULL);
 591
 592   gtk_widget_style_get (GTK_WIDGET (paned), "handle_size", &handle_size, NULL);
 593
 594   size = pos - GTK_CONTAINER (paned)->border_width - paned->drag_pos;
 595   size = CLAMP (size, paned->min_position, paned->max_position);
 596
 597   if (size != paned->child1_size)
 598     gtk_paned_set_position (paned, size);
 599 }
 600
 601 static gboolean
 602 gtk_paned_enter (GtkWidget        *widget,
 603                  GdkEventCrossing *event)
 604 {
 605   GtkPaned *paned = GTK_PANED (widget);
 606
 607   if (paned->in_drag)
 608     update_drag (paned);
 609   else
 610     {
 611       paned->handle_prelit = TRUE;
 612       gtk_widget_queue_draw_area (widget,
 613                                   paned->handle_pos.x,
 614                                   paned->handle_pos.y,
 615                                   paned->handle_pos.width,
 616                                   paned->handle_pos.height);
 617     }
 618
 619   return TRUE;
 620 }
 621
 622 static gboolean
 623 gtk_paned_leave (GtkWidget        *widget,
 624                  GdkEventCrossing *event)
 625 {
 626   GtkPaned *paned = GTK_PANED (widget);
 627
 628   if (paned->in_drag)
 629     update_drag (paned);
 630   else
 631     {
 632       paned->handle_prelit = FALSE;
 633       gtk_widget_queue_draw_area (widget,
 634                                   paned->handle_pos.x,
 635                                   paned->handle_pos.y,
 636                                   paned->handle_pos.width,
 637                                   paned->handle_pos.height);
 638     }
 639
 640   return TRUE;
 641 }
 642
 643 static gboolean
 644 gtk_paned_focus (GtkWidget        *widget,
 645                  GtkDirectionType  direction)
 646
 647 {
 648   gboolean retval;
 649
 650   /* This is a hack, but how can this be done without
 651    * excessive cut-and-paste from gtkcontainer.c?
 652    */
 653
 654   GTK_WIDGET_UNSET_FLAGS (widget, GTK_CAN_FOCUS);
 655   retval = (* GTK_WIDGET_CLASS (parent_class)->focus) (widget, direction);
 656   GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_FOCUS);
 657
 658   return retval;
 659 }
 660
 661 static gboolean
 662 gtk_paned_button_press (GtkWidget      *widget,
 663                         GdkEventButton *event)
 664 {
 665   GtkPaned *paned = GTK_PANED (widget);
 666
 667   if (!paned->in_drag &&
 668       (event->window == paned->handle) && (event->button == 1))
 669     {
 670       paned->in_drag = TRUE;
 671
 672       /* We need a server grab here, not gtk_grab_add(), since
 673        * we don't want to pass events on to the widget's children */
 674       gdk_pointer_grab (paned->handle, FALSE,
 675                         GDK_POINTER_MOTION_HINT_MASK
 676                         | GDK_BUTTON1_MOTION_MASK
 677                         | GDK_BUTTON_RELEASE_MASK
 678                         | GDK_ENTER_NOTIFY_MASK
 679                         | GDK_LEAVE_NOTIFY_MASK,
 680                         NULL, NULL,
 681                         event->time);
 682
 683       if (paned->orientation == GTK_ORIENTATION_HORIZONTAL)
 684         paned->drag_pos = event->y;
 685       else
 686         paned->drag_pos = event->x;
 687
 688       return TRUE;
 689     }
 690
 691   return FALSE;
 692 }
 693
 694 static gboolean
 695 gtk_paned_button_release (GtkWidget      *widget,
 696                           GdkEventButton *event)
 697 {
 698   GtkPaned *paned = GTK_PANED (widget);
 699
 700   if (paned->in_drag && (event->button == 1))
 701     {
 702       paned->in_drag = FALSE;
 703       paned->drag_pos = -1;
 704       paned->position_set = TRUE;
 705       gdk_display_pointer_ungrab (gtk_widget_get_display (widget),
 706                                   event->time);
 707       return TRUE;
 708     }
 709
 710   return FALSE;
 711 }
 712
 713 static gboolean
 714 gtk_paned_motion (GtkWidget      *widget,
 715                   GdkEventMotion *event)
 716 {
 717   GtkPaned *paned = GTK_PANED (widget);
 718
 719   if (paned->in_drag)
 720     {
 721       update_drag (paned);
 722       return TRUE;
 723     }
 724
 725   return FALSE;
 726 }
 727
 728 void
 729 gtk_paned_add1 (GtkPaned  *paned,
 730                 GtkWidget *widget)
 731 {
 732   gtk_paned_pack1 (paned, widget, FALSE, TRUE);
 733 }
 734
 735 void
 736 gtk_paned_add2 (GtkPaned  *paned,
 737                 GtkWidget *widget)
 738 {
 739   gtk_paned_pack2 (paned, widget, TRUE, TRUE);
 740 }
 741
 742 void
 743 gtk_paned_pack1 (GtkPaned  *paned,
 744                  GtkWidget *child,
 745                  gboolean   resize,
 746                  gboolean   shrink)
 747 {
 748   g_return_if_fail (GTK_IS_PANED (paned));
 749   g_return_if_fail (GTK_IS_WIDGET (child));
 750
 751   if (!paned->child1)
 752     {
 753       paned->child1 = child;
 754       paned->child1_resize = resize;
 755       paned->child1_shrink = shrink;
 756
 757       gtk_widget_set_parent (child, GTK_WIDGET (paned));
 758     }
 759 }
 760
 761 void
 762 gtk_paned_pack2 (GtkPaned  *paned,
 763                  GtkWidget *child,
 764                  gboolean   resize,
 765                  gboolean   shrink)
 766 {
 767   g_return_if_fail (GTK_IS_PANED (paned));
 768   g_return_if_fail (GTK_IS_WIDGET (child));
 769
 770   if (!paned->child2)
 771     {
 772       paned->child2 = child;
 773       paned->child2_resize = resize;
 774       paned->child2_shrink = shrink;
 775
 776       gtk_widget_set_parent (child, GTK_WIDGET (paned));
 777     }
 778 }
 779
 780
 781 static void
 782 gtk_paned_add (GtkContainer *container,
 783                GtkWidget    *widget)
 784 {
 785   GtkPaned *paned;
 786
 787   g_return_if_fail (GTK_IS_PANED (container));
 788
 789   paned = GTK_PANED (container);
 790
 791   if (!paned->child1)
 792     gtk_paned_add1 (paned, widget);
 793   else if (!paned->child2)
 794     gtk_paned_add2 (paned, widget);
 795 }
 796
 797 static void
 798 gtk_paned_remove (GtkContainer *container,
 799                   GtkWidget    *widget)
 800 {
 801   GtkPaned *paned;
 802   gboolean was_visible;
 803
 804   paned = GTK_PANED (container);
 805   was_visible = GTK_WIDGET_VISIBLE (widget);
 806
 807   if (paned->child1 == widget)
 808     {
 809       gtk_widget_unparent (widget);
 810
 811       paned->child1 = NULL;
 812
 813       if (was_visible && GTK_WIDGET_VISIBLE (container))
 814         gtk_widget_queue_resize (GTK_WIDGET (container));
 815     }
 816   else if (paned->child2 == widget)
 817     {
 818       gtk_widget_unparent (widget);
 819
 820       paned->child2 = NULL;
 821
 822       if (was_visible && GTK_WIDGET_VISIBLE (container))
 823         gtk_widget_queue_resize (GTK_WIDGET (container));
 824     }
 825 }
 826
 827 static void
 828 gtk_paned_forall (GtkContainer *container,
 829                   gboolean      include_internals,
 830                   GtkCallback   callback,
 831                   gpointer      callback_data)
 832 {
 833   GtkPaned *paned;
 834
 835   g_return_if_fail (callback != NULL);
 836
 837   paned = GTK_PANED (container);
 838
 839   if (paned->child1)
 840     (*callback) (paned->child1, callback_data);
 841   if (paned->child2)
 842     (*callback) (paned->child2, callback_data);
 843 }
 844
 845 /**
 846  * gtk_paned_get_position:
 847  * @paned: a #GtkPaned widget
 848  *
 849  * Obtains the position of the divider between the two panes.
 850  *
 851  * Return value: position of the divider
 852  **/
 853 gint
 854 gtk_paned_get_position (GtkPaned  *paned)
 855 {
 856   g_return_val_if_fail (GTK_IS_PANED (paned), 0);
 857
 858   return paned->child1_size;
 859 }
 860
 861 /**
 862  * gtk_paned_set_position:
 863  * @paned: a #GtkPaned widget
 864  * @position: pixel position of divider, a negative value means that the position
 865  *            is unset.
 866  *
 867  * Sets the position of the divider between the two panes.
 868  **/
 869 void
 870 gtk_paned_set_position (GtkPaned *paned,
 871                         gint      position)
 872 {
 873   GObject *object;
 874
 875   g_return_if_fail (GTK_IS_PANED (paned));
 876
 877   object = G_OBJECT (paned);
 878
 879   if (position >= 0)
 880     {
 881       /* We don't clamp here - the assumption is that
 882        * if the total allocation changes at the same time
 883        * as the position, the position set is with reference
 884        * to the new total size. If only the position changes,
 885        * then clamping will occur in gtk_paned_compute_position()
 886        */
 887
 888       paned->child1_size = position;
 889       paned->position_set = TRUE;
 890     }
 891   else
 892     {
 893       paned->position_set = FALSE;
 894     }
 895
 896   g_object_freeze_notify (object);
 897   g_object_notify (object, "position");
 898   g_object_notify (object, "position_set");
 899   g_object_thaw_notify (object);
 900
 901   gtk_widget_queue_resize (GTK_WIDGET (paned));
 902 }
 903
 904 void
 905 gtk_paned_compute_position (GtkPaned *paned,
 906                             gint      allocation,
 907                             gint      child1_req,
 908                             gint      child2_req)
 909 {
 910   gint old_position;
 911
 912   g_return_if_fail (GTK_IS_PANED (paned));
 913
 914   old_position = paned->child1_size;
 915
 916   paned->min_position = paned->child1_shrink ? 0 : child1_req;
 917
 918   paned->max_position = allocation;
 919   if (!paned->child2_shrink)
 920     paned->max_position = MAX (1, paned->max_position - child2_req);
 921
 922   if (!paned->position_set)
 923     {
 924       if (paned->child1_resize && !paned->child2_resize)
 925         paned->child1_size = MAX (1, allocation - child2_req);
 926       else if (!paned->child1_resize && paned->child2_resize)
 927         paned->child1_size = child1_req;
 928       else if (child1_req + child2_req != 0)
 929         paned->child1_size = allocation * ((gdouble)child1_req / (child1_req + child2_req));
 930       else
 931         paned->child1_size = allocation * 0.5;
 932     }
 933   else
 934     {
 935       /* If the position was set before the initial allocation.
 936        * (paned->last_allocation <= 0) just clamp it and leave it.
 937        */
 938       if (paned->last_allocation > 0)
 939         {
 940           if (paned->child1_resize && !paned->child2_resize)
 941             paned->child1_size += allocation - paned->last_allocation;
 942           else if (!(!paned->child1_resize && paned->child2_resize))
 943             paned->child1_size = allocation * ((gdouble) paned->child1_size / (paned->last_allocation));
 944         }
 945     }
 946
 947   paned->child1_size = CLAMP (paned->child1_size,
 948                               paned->min_position,
 949                               paned->max_position);
 950
 951   if (paned->child1_size != old_position)
 952     g_object_notify (G_OBJECT (paned), "position");
 953
 954   paned->last_allocation = allocation;
 955 }
 956
 957 static void
 958 gtk_paned_set_saved_focus (GtkPaned *paned, GtkWidget *widget)
 959 {
 960   if (paned->saved_focus)
 961     g_object_remove_weak_pointer (G_OBJECT (paned->saved_focus),
 962                                   (gpointer *)&(paned->saved_focus));
 963
 964   paned->saved_focus = widget;
 965
 966   if (paned->saved_focus)
 967     g_object_add_weak_pointer (G_OBJECT (paned->saved_focus),
 968                                (gpointer *)&(paned->saved_focus));
 969 }
 970
 971 static void
 972 gtk_paned_set_last_child1_focus (GtkPaned *paned, GtkWidget *widget)
 973 {
 974   if (paned->last_child1_focus)
 975     g_object_remove_weak_pointer (G_OBJECT (paned->last_child1_focus),
 976                                   (gpointer *)&(paned->last_child1_focus));
 977
 978   paned->last_child1_focus = widget;
 979
 980   if (paned->last_child1_focus)
 981     g_object_add_weak_pointer (G_OBJECT (paned->last_child1_focus),
 982                                (gpointer *)&(paned->last_child1_focus));
 983 }
 984
 985 static void
 986 gtk_paned_set_last_child2_focus (GtkPaned *paned, GtkWidget *widget)
 987 {
 988   if (paned->last_child2_focus)
 989     g_object_remove_weak_pointer (G_OBJECT (paned->last_child2_focus),
 990                                   (gpointer *)&(paned->last_child2_focus));
 991
 992   paned->last_child2_focus = widget;
 993
 994   if (paned->last_child2_focus)
 995     g_object_add_weak_pointer (G_OBJECT (paned->last_child2_focus),
 996                                (gpointer *)&(paned->last_child2_focus));
 997 }
 998
 999 static GtkWidget *
1000 paned_get_focus_widget (GtkPaned *paned)
1001 {
1002   GtkWidget *toplevel;
1003
1004   toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
1005   if (GTK_WIDGET_TOPLEVEL (toplevel))
1006     return GTK_WINDOW (toplevel)->focus_widget;
1007
1008   return NULL;
1009 }
1010
1011 static void
1012 gtk_paned_set_focus_child (GtkContainer *container,
1013                            GtkWidget    *focus_child)
1014 {
1015   GtkPaned *paned;
1016
1017   g_return_if_fail (GTK_IS_PANED (container));
1018
1019   paned = GTK_PANED (container);
1020
1021   if (focus_child == NULL)
1022     {
1023       GtkWidget *last_focus;
1024       GtkWidget *w;
1025
1026       last_focus = paned_get_focus_widget (paned);
1027
1028       if (last_focus)
1029         {
1030           /* If there is one or more paned widgets between us and the
1031            * focus widget, we want the topmost of those as last_focus
1032            */
1033           for (w = last_focus; w != GTK_WIDGET (paned); w = w->parent)
1034             if (GTK_IS_PANED (w))
1035               last_focus = w;
1036
1037           if (container->focus_child == paned->child1)
1038             gtk_paned_set_last_child1_focus (paned, last_focus);
1039           else if (container->focus_child == paned->child2)
1040             gtk_paned_set_last_child2_focus (paned, last_focus);
1041         }
1042     }
1043
1044   if (parent_class->set_focus_child)
1045     (* parent_class->set_focus_child) (container, focus_child);
1046 }
1047
1048 static void
1049 gtk_paned_get_cycle_chain (GtkPaned          *paned,
1050                            GtkDirectionType   direction,
1051                            GList            **widgets)
1052 {
1053   GtkContainer *container = GTK_CONTAINER (paned);
1054   GtkWidget *ancestor = NULL;
1055   GList *temp_list = NULL;
1056   GList *list;
1057
1058   if (paned->in_recursion)
1059     return;
1060
1061   g_assert (widgets != NULL);
1062
1063   if (paned->last_child1_focus &&
1064       !gtk_widget_is_ancestor (paned->last_child1_focus, GTK_WIDGET (paned)))
1065     {
1066       gtk_paned_set_last_child1_focus (paned, NULL);
1067     }
1068
1069   if (paned->last_child2_focus &&
1070       !gtk_widget_is_ancestor (paned->last_child2_focus, GTK_WIDGET (paned)))
1071     {
1072       gtk_paned_set_last_child2_focus (paned, NULL);
1073     }
1074
1075   if (GTK_WIDGET (paned)->parent)
1076     ancestor = gtk_widget_get_ancestor (GTK_WIDGET (paned)->parent, GTK_TYPE_PANED);
1077
1078   /* The idea here is that temp_list is a list of widgets we want to cycle
1079    * to. The list is prioritized so that the first element is our first
1080    * choice, the next our second, and so on.
1081    *
1082    * We can't just use g_list_reverse(), because we want to try
1083    * paned->last_child?_focus before paned->child?, both when we
1084    * are going forward and backward.
1085    */
1086   if (direction == GTK_DIR_TAB_FORWARD)
1087     {
1088       if (container->focus_child == paned->child1)
1089         {
1090           temp_list = g_list_append (temp_list, paned->last_child2_focus);
1091           temp_list = g_list_append (temp_list, paned->child2);
1092           temp_list = g_list_append (temp_list, ancestor);
1093         }
1094       else if (container->focus_child == paned->child2)
1095         {
1096           temp_list = g_list_append (temp_list, ancestor);
1097           temp_list = g_list_append (temp_list, paned->last_child1_focus);
1098           temp_list = g_list_append (temp_list, paned->child1);
1099         }
1100       else
1101         {
1102           temp_list = g_list_append (temp_list, paned->last_child1_focus);
1103           temp_list = g_list_append (temp_list, paned->child1);
1104           temp_list = g_list_append (temp_list, paned->last_child2_focus);
1105           temp_list = g_list_append (temp_list, paned->child2);
1106           temp_list = g_list_append (temp_list, ancestor);
1107         }
1108     }
1109   else
1110     {
1111       if (container->focus_child == paned->child1)
1112         {
1113           temp_list = g_list_append (temp_list, ancestor);
1114           temp_list = g_list_append (temp_list, paned->last_child2_focus);
1115           temp_list = g_list_append (temp_list, paned->child2);
1116         }
1117       else if (container->focus_child == paned->child2)
1118         {
1119           temp_list = g_list_append (temp_list, paned->last_child1_focus);
1120           temp_list = g_list_append (temp_list, paned->child1);
1121           temp_list = g_list_append (temp_list, ancestor);
1122         }
1123       else
1124         {
1125           temp_list = g_list_append (temp_list, paned->last_child2_focus);
1126           temp_list = g_list_append (temp_list, paned->child2);
1127           temp_list = g_list_append (temp_list, paned->last_child1_focus);
1128           temp_list = g_list_append (temp_list, paned->child1);
1129           temp_list = g_list_append (temp_list, ancestor);
1130         }
1131     }
1132
1133   /* Walk through the list and expand all the paned widgets. */
1134   for (list = temp_list; list != NULL; list = list->next)
1135     {
1136       GtkWidget *widget = list->data;
1137
1138       if (widget)
1139         {
1140           if (GTK_IS_PANED (widget))
1141             {
1142               paned->in_recursion = TRUE;
1143               gtk_paned_get_cycle_chain (GTK_PANED (widget), direction, widgets);
1144               paned->in_recursion = FALSE;
1145             }
1146           else
1147             {
1148               *widgets = g_list_append (*widgets, widget);
1149             }
1150         }
1151     }
1152
1153   g_list_free (temp_list);
1154 }
1155
1156 static gboolean
1157 gtk_paned_cycle_child_focus (GtkPaned *paned,
1158                              gboolean  reversed)
1159 {
1160   GList *cycle_chain = NULL;
1161   GList *list;
1162
1163   GtkDirectionType direction = reversed? GTK_DIR_TAB_BACKWARD : GTK_DIR_TAB_FORWARD;
1164
1165   /* ignore f6 if the handle is focused */
1166   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1167     return TRUE;
1168
1169   /* we can't just let the event propagate up the hierarchy,
1170    * because the paned will want to cycle focus _unless_ an
1171    * ancestor paned handles the event
1172    */
1173   gtk_paned_get_cycle_chain (paned, direction, &cycle_chain);
1174
1175   for (list = cycle_chain; list != NULL; list = list->next)
1176     if (gtk_widget_child_focus (GTK_WIDGET (list->data), direction))
1177       break;
1178
1179   g_list_free (cycle_chain);
1180
1181   return TRUE;
1182 }
1183
1184 static void
1185 get_child_panes (GtkWidget  *widget,
1186                  GList     **panes)
1187 {
1188   if (GTK_IS_PANED (widget))
1189     {
1190       GtkPaned *paned = GTK_PANED (widget);
1191
1192       get_child_panes (paned->child1, panes);
1193       *panes = g_list_prepend (*panes, widget);
1194       get_child_panes (paned->child2, panes);
1195     }
1196   else if (GTK_IS_CONTAINER (widget))
1197     {
1198       gtk_container_foreach (GTK_CONTAINER (widget),
1199                              (GtkCallback)get_child_panes, panes);
1200     }
1201 }
1202
1203 static GList *
1204 get_all_panes (GtkPaned *paned)
1205 {
1206   GtkPaned *topmost = NULL;
1207   GList *result = NULL;
1208   GtkWidget *w;
1209
1210   for (w = GTK_WIDGET (paned); w != NULL; w = w->parent)
1211     {
1212       if (GTK_IS_PANED (w))
1213         topmost = GTK_PANED (w);
1214     }
1215
1216   g_assert (topmost);
1217
1218   get_child_panes (GTK_WIDGET (topmost), &result);
1219
1220   return g_list_reverse (result);
1221 }
1222
1223 static void
1224 gtk_paned_find_neighbours (GtkPaned  *paned,
1225                            GtkPaned **next,
1226                            GtkPaned **prev)
1227 {
1228   GList *all_panes = get_all_panes (paned);
1229   GList *this_link;
1230
1231   g_assert (all_panes);
1232
1233   this_link = g_list_find (all_panes, paned);
1234
1235   g_assert (this_link);
1236
1237   if (this_link->next)
1238     *next = this_link->next->data;
1239   else
1240     *next = all_panes->data;
1241
1242   if (this_link->prev)
1243     *prev = this_link->prev->data;
1244   else
1245     *prev = g_list_last (all_panes)->data;
1246
1247   if (*next == paned)
1248     *next = NULL;
1249
1250   if (*prev == paned)
1251     *prev = NULL;
1252
1253   g_list_free (all_panes);
1254 }
1255
1256 static gboolean
1257 gtk_paned_move_handle (GtkPaned      *paned,
1258                        GtkScrollType  scroll)
1259 {
1260   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1261     {
1262       gint old_position;
1263       gint new_position;
1264
1265       enum {
1266         SINGLE_STEP_SIZE = 1,
1267         PAGE_STEP_SIZE   = 75
1268       };
1269
1270       old_position = gtk_paned_get_position (paned);
1271
1272       switch (scroll)
1273         {
1274         case GTK_SCROLL_STEP_LEFT:
1275         case GTK_SCROLL_STEP_UP:
1276         case GTK_SCROLL_STEP_BACKWARD:
1277           new_position = old_position - SINGLE_STEP_SIZE;
1278           break;
1279
1280         case GTK_SCROLL_STEP_RIGHT:
1281         case GTK_SCROLL_STEP_DOWN:
1282         case GTK_SCROLL_STEP_FORWARD:
1283           new_position = old_position + SINGLE_STEP_SIZE;
1284           break;
1285
1286         case GTK_SCROLL_PAGE_LEFT:
1287         case GTK_SCROLL_PAGE_UP:
1288         case GTK_SCROLL_PAGE_BACKWARD:
1289           new_position = old_position - PAGE_STEP_SIZE;
1290           break;
1291
1292         case GTK_SCROLL_PAGE_RIGHT:
1293         case GTK_SCROLL_PAGE_DOWN:
1294         case GTK_SCROLL_PAGE_FORWARD:
1295           new_position = old_position + PAGE_STEP_SIZE;
1296           break;
1297
1298         case GTK_SCROLL_START:
1299           new_position = paned->min_position;
1300           break;
1301
1302         case GTK_SCROLL_END:
1303           new_position = paned->max_position;
1304           break;
1305
1306         default:
1307           new_position = old_position;
1308           break;
1309         }
1310
1311       new_position = CLAMP (new_position, paned->min_position, paned->max_position);
1312
1313       if (old_position != new_position)
1314         gtk_paned_set_position (paned, new_position);
1315
1316       return TRUE;
1317     }
1318
1319   return FALSE;
1320 }
1321
1322 static void
1323 gtk_paned_restore_focus (GtkPaned *paned)
1324 {
1325   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1326     {
1327       if (paned->saved_focus && GTK_WIDGET_SENSITIVE (paned->saved_focus))
1328         {
1329           gtk_widget_grab_focus (paned->saved_focus);
1330         }
1331       else
1332         {
1333           /* the saved focus is somehow not available for focusing,
1334            * try
1335            *   1) tabbing into the paned widget
1336            * if that didn't work,
1337            *   2) unset focus for the window if there is one
1338            */
1339
1340           if (!gtk_widget_child_focus (GTK_WIDGET (paned), GTK_DIR_TAB_FORWARD))
1341             {
1342               GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
1343
1344               if (GTK_IS_WINDOW (toplevel))
1345                 gtk_window_set_focus (GTK_WINDOW (toplevel), NULL);
1346             }
1347         }
1348
1349       gtk_paned_set_saved_focus (paned, NULL);
1350     }
1351 }
1352
1353 static gboolean
1354 gtk_paned_accept_position (GtkPaned *paned)
1355 {
1356   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1357     {
1358       paned->original_position = -1;
1359       gtk_paned_restore_focus (paned);
1360
1361       return TRUE;
1362     }
1363
1364   return FALSE;
1365 }
1366
1367
1368 static gboolean
1369 gtk_paned_cancel_position (GtkPaned *paned)
1370 {
1371   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1372     {
1373       if (paned->original_position != -1)
1374         {
1375           gtk_paned_set_position (paned, paned->original_position);
1376           paned->original_position = -1;
1377         }
1378
1379       gtk_paned_restore_focus (paned);
1380       return TRUE;
1381     }
1382
1383   return FALSE;
1384 }
1385
1386 static gboolean
1387 gtk_paned_cycle_handle_focus (GtkPaned *paned,
1388                               gboolean  reversed)
1389 {
1390   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1391     {
1392       GtkPaned *next, *prev;
1393       GtkPaned *focus = NULL;
1394
1395       gtk_paned_find_neighbours (paned, &next, &prev);
1396
1397       if (reversed && prev)
1398         focus = prev;
1399       else if (!reversed && next)
1400         focus = next;
1401
1402       if (focus)
1403         {
1404           gtk_paned_set_saved_focus (focus, paned->saved_focus);
1405           gtk_paned_set_saved_focus (paned, NULL);
1406           gtk_widget_grab_focus (GTK_WIDGET (focus));
1407
1408           if (!gtk_widget_is_focus (GTK_WIDGET (paned)))
1409             {
1410               paned->original_position = -1;
1411               focus->original_position = gtk_paned_get_position (focus);
1412             }
1413         }
1414
1415       return TRUE;
1416     }
1417
1418   return FALSE;
1419 }
1420
1421 static gboolean
1422 gtk_paned_toggle_handle_focus (GtkPaned *paned)
1423 {
1424   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1425     {
1426       gtk_paned_accept_position (paned);
1427     }
1428   else
1429     {
1430       GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
1431
1432       if (GTK_IS_WINDOW (toplevel))
1433         gtk_paned_set_saved_focus (paned, GTK_WINDOW (toplevel)->focus_widget);
1434
1435       gtk_widget_grab_focus (GTK_WIDGET (paned));
1436       paned->original_position = gtk_paned_get_position (paned);
1437     }
1438
1439   return TRUE;
1440 }