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   CHILD_PROP_0,
  44   CHILD_PROP_RESIZE,
  45   CHILD_PROP_SHRINK
  46 };
  47
  48 enum {
  49   CYCLE_CHILD_FOCUS,
  50   TOGGLE_HANDLE_FOCUS,
  51   MOVE_HANDLE,
  52   CYCLE_HANDLE_FOCUS,
  53   ACCEPT_POSITION,
  54   CANCEL_POSITION,
  55   LAST_SIGNAL
  56 };
  57
  58 static void     gtk_paned_class_init            (GtkPanedClass    *klass);
  59 static void     gtk_paned_init                  (GtkPaned         *paned);
  60 static void     gtk_paned_set_property          (GObject          *object,
  61                                                  guint             prop_id,
  62                                                  const GValue     *value,
  63                                                  GParamSpec       *pspec);
  64 static void     gtk_paned_get_property          (GObject          *object,
  65                                                  guint             prop_id,
  66                                                  GValue           *value,
  67                                                  GParamSpec       *pspec);
  68 static void gtk_paned_set_child_property        (GtkContainer      *container,
  69                                                  GtkWidget         *child,
  70                                                  guint              property_id,
  71                                                  const GValue      *value,
  72                                                  GParamSpec        *pspec);
  73 static void gtk_paned_get_child_property        (GtkContainer      *container,
  74                                                  GtkWidget         *child,
  75                                                  guint              property_id,
  76                                                  GValue            *value,
  77                                                  GParamSpec        *pspec);
  78 static void     gtk_paned_finalize              (GObject          *object);
  79 static void     gtk_paned_realize               (GtkWidget        *widget);
  80 static void     gtk_paned_unrealize             (GtkWidget        *widget);
  81 static void     gtk_paned_map                   (GtkWidget        *widget);
  82 static void     gtk_paned_unmap                 (GtkWidget        *widget);
  83 static gboolean gtk_paned_expose                (GtkWidget        *widget,
  84                                                  GdkEventExpose   *event);
  85 static gboolean gtk_paned_enter                 (GtkWidget        *widget,
  86                                                  GdkEventCrossing *event);
  87 static gboolean gtk_paned_leave                 (GtkWidget        *widget,
  88                                                  GdkEventCrossing *event);
  89 static gboolean gtk_paned_button_press          (GtkWidget        *widget,
  90                                                  GdkEventButton   *event);
  91 static gboolean gtk_paned_button_release        (GtkWidget        *widget,
  92                                                  GdkEventButton   *event);
  93 static gboolean gtk_paned_motion                (GtkWidget        *widget,
  94                                                  GdkEventMotion   *event);
  95 static gboolean gtk_paned_focus                 (GtkWidget        *widget,
  96                                                  GtkDirectionType  direction);
  97 static void     gtk_paned_add                   (GtkContainer     *container,
  98                                                  GtkWidget        *widget);
  99 static void     gtk_paned_remove                (GtkContainer     *container,
 100                                                  GtkWidget        *widget);
 101 static void     gtk_paned_forall                (GtkContainer     *container,
 102                                                  gboolean          include_internals,
 103                                                  GtkCallback       callback,
 104                                                  gpointer          callback_data);
 105 static void     gtk_paned_set_focus_child       (GtkContainer     *container,
 106                                                  GtkWidget        *child);
 107 static void     gtk_paned_set_saved_focus       (GtkPaned         *paned,
 108                                                  GtkWidget        *widget);
 109 static void     gtk_paned_set_first_paned       (GtkPaned         *paned,
 110                                                  GtkPaned         *first_paned);
 111 static void     gtk_paned_set_last_child1_focus (GtkPaned         *paned,
 112                                                  GtkWidget        *widget);
 113 static void     gtk_paned_set_last_child2_focus (GtkPaned         *paned,
 114                                                  GtkWidget        *widget);
 115 static gboolean gtk_paned_cycle_child_focus     (GtkPaned         *paned,
 116                                                  gboolean          reverse);
 117 static gboolean gtk_paned_cycle_handle_focus    (GtkPaned         *paned,
 118                                                  gboolean          reverse);
 119 static gboolean gtk_paned_move_handle           (GtkPaned         *paned,
 120                                                  GtkScrollType     scroll);
 121 static gboolean gtk_paned_accept_position       (GtkPaned         *paned);
 122 static gboolean gtk_paned_cancel_position       (GtkPaned         *paned);
 123 static gboolean gtk_paned_toggle_handle_focus   (GtkPaned         *paned);
 124
 125 static GType    gtk_paned_child_type             (GtkContainer     *container);
 126
 127 static GtkContainerClass *parent_class = NULL;
 128
 129 struct _GtkPanedPrivate
 130 {
 131   GtkWidget *saved_focus;
 132   GtkPaned *first_paned;
 133 };
 134
 135 GType
 136 gtk_paned_get_type (void)
 137 {
 138   static GType paned_type = 0;
 139
 140   if (!paned_type)
 141     {
 142       static const GTypeInfo paned_info =
 143       {
 144         sizeof (GtkPanedClass),
 145         NULL,           /* base_init */
 146         NULL,           /* base_finalize */
 147         (GClassInitFunc) gtk_paned_class_init,
 148         NULL,           /* class_finalize */
 149         NULL,           /* class_data */
 150         sizeof (GtkPaned),
 151         0,              /* n_preallocs */
 152         (GInstanceInitFunc) gtk_paned_init,
 153         NULL,           /* value_table */
 154       };
 155
 156       paned_type = g_type_register_static (GTK_TYPE_CONTAINER, "GtkPaned",
 157                                            &paned_info, G_TYPE_FLAG_ABSTRACT);
 158     }
 159
 160   return paned_type;
 161 }
 162
 163 static guint signals[LAST_SIGNAL] = { 0 };
 164
 165 static void
 166 add_tab_bindings (GtkBindingSet    *binding_set,
 167                   GdkModifierType   modifiers)
 168 {
 169   gtk_binding_entry_add_signal (binding_set, GDK_Tab, modifiers,
 170                                 "toggle_handle_focus", 0);
 171   gtk_binding_entry_add_signal (binding_set, GDK_KP_Tab, modifiers,
 172                                 "toggle_handle_focus", 0);
 173 }
 174
 175 static void
 176 add_move_binding (GtkBindingSet   *binding_set,
 177                   guint            keyval,
 178                   GdkModifierType  mask,
 179                   GtkScrollType    scroll)
 180 {
 181   gtk_binding_entry_add_signal (binding_set, keyval, mask,
 182                                 "move_handle", 1,
 183                                 GTK_TYPE_SCROLL_TYPE, scroll);
 184 }
 185
 186 static void
 187 gtk_paned_class_init (GtkPanedClass *class)
 188 {
 189   GObjectClass *object_class;
 190   GtkWidgetClass *widget_class;
 191   GtkContainerClass *container_class;
 192   GtkPanedClass *paned_class;
 193   GtkBindingSet *binding_set;
 194
 195   object_class = (GObjectClass *) class;
 196   widget_class = (GtkWidgetClass *) class;
 197   container_class = (GtkContainerClass *) class;
 198   paned_class = (GtkPanedClass *) class;
 199
 200   parent_class = g_type_class_peek_parent (class);
 201
 202   object_class->set_property = gtk_paned_set_property;
 203   object_class->get_property = gtk_paned_get_property;
 204   object_class->finalize = gtk_paned_finalize;
 205
 206   widget_class->realize = gtk_paned_realize;
 207   widget_class->unrealize = gtk_paned_unrealize;
 208   widget_class->map = gtk_paned_map;
 209   widget_class->unmap = gtk_paned_unmap;
 210   widget_class->expose_event = gtk_paned_expose;
 211   widget_class->focus = gtk_paned_focus;
 212   widget_class->enter_notify_event = gtk_paned_enter;
 213   widget_class->leave_notify_event = gtk_paned_leave;
 214   widget_class->button_press_event = gtk_paned_button_press;
 215   widget_class->button_release_event = gtk_paned_button_release;
 216   widget_class->motion_notify_event = gtk_paned_motion;
 217
 218   container_class->add = gtk_paned_add;
 219   container_class->remove = gtk_paned_remove;
 220   container_class->forall = gtk_paned_forall;
 221   container_class->child_type = gtk_paned_child_type;
 222   container_class->set_focus_child = gtk_paned_set_focus_child;
 223   container_class->set_child_property = gtk_paned_set_child_property;
 224   container_class->get_child_property = gtk_paned_get_child_property;
 225
 226   paned_class->cycle_child_focus = gtk_paned_cycle_child_focus;
 227   paned_class->toggle_handle_focus = gtk_paned_toggle_handle_focus;
 228   paned_class->move_handle = gtk_paned_move_handle;
 229   paned_class->cycle_handle_focus = gtk_paned_cycle_handle_focus;
 230   paned_class->accept_position = gtk_paned_accept_position;
 231   paned_class->cancel_position = gtk_paned_cancel_position;
 232
 233   g_object_class_install_property (object_class,
 234                                    PROP_POSITION,
 235                                    g_param_spec_int ("position",
 236                                                      _("Position"),
 237                                                      _("Position of paned separator in pixels (0 means all the way to the left/top)"),
 238                                                      0,
 239                                                      G_MAXINT,
 240                                                      0,
 241                                                      G_PARAM_READABLE | G_PARAM_WRITABLE));
 242   g_object_class_install_property (object_class,
 243                                    PROP_POSITION_SET,
 244                                    g_param_spec_boolean ("position_set",
 245                                                          _("Position Set"),
 246                                                          _("TRUE if the Position property should be used"),
 247                                                          FALSE,
 248                                                          G_PARAM_READABLE | G_PARAM_WRITABLE));
 249
 250   gtk_widget_class_install_style_property (widget_class,
 251                                            g_param_spec_int ("handle_size",
 252                                                              _("Handle Size"),
 253                                                              _("Width of handle"),
 254                                                              0,
 255                                                              G_MAXINT,
 256                                                              5,
 257                                                              G_PARAM_READABLE));
 258
 259 /**
 260  * GtkPaned:resize:
 261  *
 262  * The "resize" child property determines whether the child expands and
 263  * shrinks along with the paned widget.
 264  *
 265  * Since: 2.4
 266  */
 267   gtk_container_class_install_child_property (container_class,
 268                                               CHILD_PROP_RESIZE,
 269                                               g_param_spec_boolean ("resize",
 270                                                                     _("Resize"),
 271                                                                     _("If TRUE, the child expands and shrinks along with the paned widget"),
 272                                                                     TRUE,
 273                                                                     G_PARAM_READWRITE));
 274
 275 /**
 276  * GtkPaned:shrink:
 277  *
 278  * The "shrink" child property determines whether the child can be made
 279  * smaller than its requisition.
 280  *
 281  * Since: 2.4
 282  */
 283   gtk_container_class_install_child_property (container_class,
 284                                               CHILD_PROP_SHRINK,
 285                                               g_param_spec_boolean ("shrink",
 286                                                                     _("Shrink"),
 287                                                                     _("If TRUE, the child can be made smaller than its requisition"),
 288                                                                     TRUE,
 289                                                                     G_PARAM_READWRITE));
 290
 291   signals [CYCLE_HANDLE_FOCUS] =
 292     g_signal_new ("cycle_child_focus",
 293                   G_TYPE_FROM_CLASS (object_class),
 294                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 295                   G_STRUCT_OFFSET (GtkPanedClass, cycle_child_focus),
 296                   NULL, NULL,
 297                   _gtk_marshal_BOOLEAN__BOOLEAN,
 298                   G_TYPE_BOOLEAN, 1,
 299                   G_TYPE_BOOLEAN);
 300
 301   signals [TOGGLE_HANDLE_FOCUS] =
 302     g_signal_new ("toggle_handle_focus",
 303                   G_TYPE_FROM_CLASS (object_class),
 304                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 305                   G_STRUCT_OFFSET (GtkPanedClass, toggle_handle_focus),
 306                   NULL, NULL,
 307                   _gtk_marshal_BOOLEAN__VOID,
 308                   G_TYPE_BOOLEAN, 0);
 309
 310   signals[MOVE_HANDLE] =
 311     g_signal_new ("move_handle",
 312                   G_TYPE_FROM_CLASS (object_class),
 313                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 314                   G_STRUCT_OFFSET (GtkPanedClass, move_handle),
 315                   NULL, NULL,
 316                   _gtk_marshal_BOOLEAN__ENUM,
 317                   G_TYPE_BOOLEAN, 1,
 318                   GTK_TYPE_SCROLL_TYPE);
 319
 320   signals [CYCLE_HANDLE_FOCUS] =
 321     g_signal_new ("cycle_handle_focus",
 322                   G_TYPE_FROM_CLASS (object_class),
 323                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 324                   G_STRUCT_OFFSET (GtkPanedClass, cycle_handle_focus),
 325                   NULL, NULL,
 326                   _gtk_marshal_BOOLEAN__BOOLEAN,
 327                   G_TYPE_BOOLEAN, 1,
 328                   G_TYPE_BOOLEAN);
 329
 330   signals [ACCEPT_POSITION] =
 331     g_signal_new ("accept_position",
 332                   G_TYPE_FROM_CLASS (object_class),
 333                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 334                   G_STRUCT_OFFSET (GtkPanedClass, accept_position),
 335                   NULL, NULL,
 336                   _gtk_marshal_BOOLEAN__VOID,
 337                   G_TYPE_BOOLEAN, 0);
 338
 339   signals [CANCEL_POSITION] =
 340     g_signal_new ("cancel_position",
 341                   G_TYPE_FROM_CLASS (object_class),
 342                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 343                   G_STRUCT_OFFSET (GtkPanedClass, cancel_position),
 344                   NULL, NULL,
 345                   _gtk_marshal_BOOLEAN__VOID,
 346                   G_TYPE_BOOLEAN, 0);
 347
 348   binding_set = gtk_binding_set_by_class (class);
 349
 350   /* F6 and friends */
 351   gtk_binding_entry_add_signal (binding_set,
 352                                 GDK_F6, 0,
 353                                 "cycle_child_focus", 1,
 354                                 G_TYPE_BOOLEAN, FALSE);
 355   gtk_binding_entry_add_signal (binding_set,
 356                                 GDK_F6, GDK_SHIFT_MASK,
 357                                 "cycle_child_focus", 1,
 358                                 G_TYPE_BOOLEAN, TRUE);
 359
 360   /* F8 and friends */
 361   gtk_binding_entry_add_signal (binding_set,
 362                                 GDK_F8, 0,
 363                                 "cycle_handle_focus", 1,
 364                                 G_TYPE_BOOLEAN, FALSE);
 365
 366   gtk_binding_entry_add_signal (binding_set,
 367                                 GDK_F8, GDK_SHIFT_MASK,
 368                                 "cycle_handle_focus", 1,
 369                                 G_TYPE_BOOLEAN, TRUE);
 370
 371   add_tab_bindings (binding_set, 0);
 372   add_tab_bindings (binding_set, GDK_CONTROL_MASK);
 373   add_tab_bindings (binding_set, GDK_SHIFT_MASK);
 374   add_tab_bindings (binding_set, GDK_CONTROL_MASK | GDK_SHIFT_MASK);
 375
 376   /* accept and cancel positions */
 377   gtk_binding_entry_add_signal (binding_set,
 378                                 GDK_Escape, 0,
 379                                 "cancel_position", 0);
 380
 381   gtk_binding_entry_add_signal (binding_set,
 382                                 GDK_Return, 0,
 383                                 "accept_position", 0);
 384   gtk_binding_entry_add_signal (binding_set,
 385                                 GDK_KP_Enter, 0,
 386                                 "accept_position", 0);
 387   gtk_binding_entry_add_signal (binding_set,
 388                                 GDK_space, 0,
 389                                 "accept_position", 0);
 390   gtk_binding_entry_add_signal (binding_set,
 391                                 GDK_KP_Space, 0,
 392                                 "accept_position", 0);
 393
 394   /* move handle */
 395   add_move_binding (binding_set, GDK_Left, 0, GTK_SCROLL_STEP_LEFT);
 396   add_move_binding (binding_set, GDK_KP_Left, 0, GTK_SCROLL_STEP_LEFT);
 397   add_move_binding (binding_set, GDK_Left, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_LEFT);
 398   add_move_binding (binding_set, GDK_KP_Left, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_LEFT);
 399
 400   add_move_binding (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_RIGHT);
 401   add_move_binding (binding_set, GDK_Right, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_RIGHT);
 402   add_move_binding (binding_set, GDK_KP_Right, 0, GTK_SCROLL_STEP_RIGHT);
 403   add_move_binding (binding_set, GDK_KP_Right, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_RIGHT);
 404
 405   add_move_binding (binding_set, GDK_Up, 0, GTK_SCROLL_STEP_UP);
 406   add_move_binding (binding_set, GDK_Up, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_UP);
 407   add_move_binding (binding_set, GDK_KP_Up, 0, GTK_SCROLL_STEP_UP);
 408   add_move_binding (binding_set, GDK_KP_Up, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_UP);
 409   add_move_binding (binding_set, GDK_Page_Up, 0, GTK_SCROLL_PAGE_UP);
 410   add_move_binding (binding_set, GDK_KP_Page_Up, 0, GTK_SCROLL_PAGE_UP);
 411
 412   add_move_binding (binding_set, GDK_Down, 0, GTK_SCROLL_STEP_DOWN);
 413   add_move_binding (binding_set, GDK_Down, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_DOWN);
 414   add_move_binding (binding_set, GDK_KP_Down, 0, GTK_SCROLL_STEP_DOWN);
 415   add_move_binding (binding_set, GDK_KP_Down, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_DOWN);
 416   add_move_binding (binding_set, GDK_Page_Down, 0, GTK_SCROLL_PAGE_RIGHT);
 417   add_move_binding (binding_set, GDK_KP_Page_Down, 0, GTK_SCROLL_PAGE_RIGHT);
 418
 419   add_move_binding (binding_set, GDK_Home, 0, GTK_SCROLL_START);
 420   add_move_binding (binding_set, GDK_KP_Home, 0, GTK_SCROLL_START);
 421   add_move_binding (binding_set, GDK_End, 0, GTK_SCROLL_END);
 422   add_move_binding (binding_set, GDK_KP_End, 0, GTK_SCROLL_END);
 423 }
 424
 425 static GType
 426 gtk_paned_child_type (GtkContainer *container)
 427 {
 428   if (!GTK_PANED (container)->child1 || !GTK_PANED (container)->child2)
 429     return GTK_TYPE_WIDGET;
 430   else
 431     return G_TYPE_NONE;
 432 }
 433
 434 static void
 435 gtk_paned_init (GtkPaned *paned)
 436 {
 437   GTK_WIDGET_SET_FLAGS (paned, GTK_NO_WINDOW | GTK_CAN_FOCUS);
 438
 439   paned->child1 = NULL;
 440   paned->child2 = NULL;
 441   paned->handle = NULL;
 442   paned->xor_gc = NULL;
 443   paned->cursor_type = GDK_CROSS;
 444
 445   paned->handle_pos.width = 5;
 446   paned->handle_pos.height = 5;
 447   paned->position_set = FALSE;
 448   paned->last_allocation = -1;
 449   paned->in_drag = FALSE;
 450
 451   paned->priv = g_new0 (GtkPanedPrivate, 1);
 452   paned->last_child1_focus = NULL;
 453   paned->last_child2_focus = NULL;
 454   paned->in_recursion = FALSE;
 455   paned->handle_prelit = FALSE;
 456   paned->original_position = -1;
 457
 458   paned->handle_pos.x = -1;
 459   paned->handle_pos.y = -1;
 460
 461   paned->drag_pos = -1;
 462 }
 463
 464 static void
 465 gtk_paned_set_property (GObject        *object,
 466                         guint           prop_id,
 467                         const GValue   *value,
 468                         GParamSpec     *pspec)
 469 {
 470   GtkPaned *paned = GTK_PANED (object);
 471
 472   switch (prop_id)
 473     {
 474     case PROP_POSITION:
 475       gtk_paned_set_position (paned, g_value_get_int (value));
 476       break;
 477     case PROP_POSITION_SET:
 478       paned->position_set = g_value_get_boolean (value);
 479       gtk_widget_queue_resize (GTK_WIDGET (paned));
 480       break;
 481     default:
 482       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 483       break;
 484     }
 485 }
 486
 487 static void
 488 gtk_paned_get_property (GObject        *object,
 489                         guint           prop_id,
 490                         GValue         *value,
 491                         GParamSpec     *pspec)
 492 {
 493   GtkPaned *paned = GTK_PANED (object);
 494
 495   switch (prop_id)
 496     {
 497     case PROP_POSITION:
 498       g_value_set_int (value, paned->child1_size);
 499       break;
 500     case PROP_POSITION_SET:
 501       g_value_set_boolean (value, paned->position_set);
 502       break;
 503     default:
 504       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 505       break;
 506     }
 507 }
 508
 509 static void
 510 gtk_paned_set_child_property (GtkContainer    *container,
 511                               GtkWidget       *child,
 512                               guint            property_id,
 513                               const GValue    *value,
 514                               GParamSpec      *pspec)
 515 {
 516   GtkPaned *paned = GTK_PANED (container);
 517   gboolean old_value, new_value;
 518
 519   g_assert (child == paned->child1 || child == paned->child2);
 520
 521   new_value = g_value_get_boolean (value);
 522   switch (property_id)
 523     {
 524     case CHILD_PROP_RESIZE:
 525       if (child == paned->child1)
 526         {
 527           old_value = paned->child1_resize;
 528           paned->child1_resize = new_value;
 529         }
 530       else
 531         {
 532           old_value = paned->child2_resize;
 533           paned->child2_resize = new_value;
 534         }
 535       break;
 536     case CHILD_PROP_SHRINK:
 537       if (child == paned->child1)
 538         {
 539           old_value = paned->child1_shrink;
 540           paned->child1_shrink = new_value;
 541         }
 542       else
 543         {
 544           old_value = paned->child2_shrink;
 545           paned->child2_shrink = new_value;
 546         }
 547       break;
 548     default:
 549       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 550       break;
 551     }
 552   if (old_value != new_value)
 553     gtk_widget_queue_resize (container);
 554 }
 555
 556 static void
 557 gtk_paned_get_child_property (GtkContainer *container,
 558                               GtkWidget    *child,
 559                               guint         property_id,
 560                               GValue       *value,
 561                               GParamSpec   *pspec)
 562 {
 563   GtkPaned *paned = GTK_PANED (container);
 564
 565   g_assert (child == paned->child1 || child == paned->child2);
 566
 567   switch (property_id)
 568     {
 569     case CHILD_PROP_RESIZE:
 570       if (child == paned->child1)
 571         g_value_set_boolean (value, paned->child1_resize);
 572       else
 573         g_value_set_boolean (value, paned->child2_resize);
 574       break;
 575     case CHILD_PROP_SHRINK:
 576       if (child == paned->child1)
 577         g_value_set_boolean (value, paned->child1_shrink);
 578       else
 579         g_value_set_boolean (value, paned->child2_shrink);
 580       break;
 581     default:
 582       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 583       break;
 584     }
 585 }
 586
 587 static void
 588 gtk_paned_finalize (GObject *object)
 589 {
 590   GtkPaned *paned = GTK_PANED (object);
 591
 592   gtk_paned_set_saved_focus (paned, NULL);
 593   gtk_paned_set_first_paned (paned, NULL);
 594
 595   g_free (paned->priv);
 596
 597   G_OBJECT_CLASS (parent_class)->finalize (object);
 598 }
 599
 600 static void
 601 gtk_paned_realize (GtkWidget *widget)
 602 {
 603   GtkPaned *paned;
 604   GdkWindowAttr attributes;
 605   gint attributes_mask;
 606
 607   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 608   paned = GTK_PANED (widget);
 609
 610   widget->window = gtk_widget_get_parent_window (widget);
 611   g_object_ref (widget->window);
 612
 613   attributes.window_type = GDK_WINDOW_CHILD;
 614   attributes.wclass = GDK_INPUT_ONLY;
 615   attributes.x = paned->handle_pos.x;
 616   attributes.y = paned->handle_pos.y;
 617   attributes.width = paned->handle_pos.width;
 618   attributes.height = paned->handle_pos.height;
 619   attributes.cursor = gdk_cursor_new_for_display (gtk_widget_get_display (widget),
 620                                                   paned->cursor_type);
 621   attributes.event_mask = gtk_widget_get_events (widget);
 622   attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
 623                             GDK_BUTTON_RELEASE_MASK |
 624                             GDK_ENTER_NOTIFY_MASK |
 625                             GDK_LEAVE_NOTIFY_MASK |
 626                             GDK_POINTER_MOTION_MASK |
 627                             GDK_POINTER_MOTION_HINT_MASK);
 628   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_CURSOR;
 629
 630   paned->handle = gdk_window_new (widget->window,
 631                                   &attributes, attributes_mask);
 632   gdk_window_set_user_data (paned->handle, paned);
 633   gdk_cursor_unref (attributes.cursor);
 634
 635   widget->style = gtk_style_attach (widget->style, widget->window);
 636
 637   if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1) &&
 638       paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 639     gdk_window_show (paned->handle);
 640 }
 641
 642 static void
 643 gtk_paned_unrealize (GtkWidget *widget)
 644 {
 645   GtkPaned *paned = GTK_PANED (widget);
 646
 647   if (paned->xor_gc)
 648     {
 649       g_object_unref (paned->xor_gc);
 650       paned->xor_gc = NULL;
 651     }
 652
 653   if (paned->handle)
 654     {
 655       gdk_window_set_user_data (paned->handle, NULL);
 656       gdk_window_destroy (paned->handle);
 657       paned->handle = NULL;
 658     }
 659
 660   gtk_paned_set_last_child1_focus (paned, NULL);
 661   gtk_paned_set_last_child2_focus (paned, NULL);
 662   gtk_paned_set_saved_focus (paned, NULL);
 663   gtk_paned_set_first_paned (paned, NULL);
 664
 665   if (GTK_WIDGET_CLASS (parent_class)->unrealize)
 666     (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 667 }
 668
 669 static void
 670 gtk_paned_map (GtkWidget *widget)
 671 {
 672   GtkPaned *paned = GTK_PANED (widget);
 673
 674   gdk_window_show (paned->handle);
 675
 676   GTK_WIDGET_CLASS (parent_class)->map (widget);
 677 }
 678
 679 static void
 680 gtk_paned_unmap (GtkWidget *widget)
 681 {
 682   GtkPaned *paned = GTK_PANED (widget);
 683
 684   gdk_window_hide (paned->handle);
 685
 686   GTK_WIDGET_CLASS (parent_class)->unmap (widget);
 687 }
 688
 689 static gboolean
 690 gtk_paned_expose (GtkWidget      *widget,
 691                   GdkEventExpose *event)
 692 {
 693   GtkPaned *paned = GTK_PANED (widget);
 694
 695   if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_MAPPED (widget) &&
 696       paned->child1 && GTK_WIDGET_VISIBLE (paned->child1) &&
 697       paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 698     {
 699       GdkRegion *region;
 700
 701       region = gdk_region_rectangle (&paned->handle_pos);
 702       gdk_region_intersect (region, event->region);
 703
 704       if (!gdk_region_empty (region))
 705         {
 706           GtkStateType state;
 707           GdkRectangle clip;
 708
 709           gdk_region_get_clipbox (region, &clip);
 710
 711           if (gtk_widget_is_focus (widget))
 712             state = GTK_STATE_SELECTED;
 713           else if (paned->handle_prelit)
 714             state = GTK_STATE_PRELIGHT;
 715           else
 716             state = GTK_WIDGET_STATE (widget);
 717
 718           gtk_paint_handle (widget->style, widget->window,
 719                             state, GTK_SHADOW_NONE,
 720                             &clip, widget, "paned",
 721                             paned->handle_pos.x, paned->handle_pos.y,
 722                             paned->handle_pos.width, paned->handle_pos.height,
 723                             paned->orientation);
 724         }
 725
 726       gdk_region_destroy (region);
 727     }
 728
 729   /* Chain up to draw children */
 730   GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
 731
 732   return FALSE;
 733 }
 734
 735 static void
 736 update_drag (GtkPaned *paned)
 737 {
 738   gint pos;
 739   gint handle_size;
 740   gint size;
 741
 742   if (paned->orientation == GTK_ORIENTATION_HORIZONTAL)
 743     gtk_widget_get_pointer (GTK_WIDGET (paned), NULL, &pos);
 744   else
 745     gtk_widget_get_pointer (GTK_WIDGET (paned), &pos, NULL);
 746
 747   gtk_widget_style_get (GTK_WIDGET (paned), "handle_size", &handle_size, NULL);
 748
 749   size = pos - GTK_CONTAINER (paned)->border_width - paned->drag_pos;
 750   size = CLAMP (size, paned->min_position, paned->max_position);
 751
 752   if (size != paned->child1_size)
 753     gtk_paned_set_position (paned, size);
 754 }
 755
 756 static gboolean
 757 gtk_paned_enter (GtkWidget        *widget,
 758                  GdkEventCrossing *event)
 759 {
 760   GtkPaned *paned = GTK_PANED (widget);
 761
 762   if (paned->in_drag)
 763     update_drag (paned);
 764   else
 765     {
 766       paned->handle_prelit = TRUE;
 767       gtk_widget_queue_draw_area (widget,
 768                                   paned->handle_pos.x,
 769                                   paned->handle_pos.y,
 770                                   paned->handle_pos.width,
 771                                   paned->handle_pos.height);
 772     }
 773
 774   return TRUE;
 775 }
 776
 777 static gboolean
 778 gtk_paned_leave (GtkWidget        *widget,
 779                  GdkEventCrossing *event)
 780 {
 781   GtkPaned *paned = GTK_PANED (widget);
 782
 783   if (paned->in_drag)
 784     update_drag (paned);
 785   else
 786     {
 787       paned->handle_prelit = FALSE;
 788       gtk_widget_queue_draw_area (widget,
 789                                   paned->handle_pos.x,
 790                                   paned->handle_pos.y,
 791                                   paned->handle_pos.width,
 792                                   paned->handle_pos.height);
 793     }
 794
 795   return TRUE;
 796 }
 797
 798 static gboolean
 799 gtk_paned_focus (GtkWidget        *widget,
 800                  GtkDirectionType  direction)
 801
 802 {
 803   gboolean retval;
 804
 805   /* This is a hack, but how can this be done without
 806    * excessive cut-and-paste from gtkcontainer.c?
 807    */
 808
 809   GTK_WIDGET_UNSET_FLAGS (widget, GTK_CAN_FOCUS);
 810   retval = (* GTK_WIDGET_CLASS (parent_class)->focus) (widget, direction);
 811   GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_FOCUS);
 812
 813   return retval;
 814 }
 815
 816 static gboolean
 817 gtk_paned_button_press (GtkWidget      *widget,
 818                         GdkEventButton *event)
 819 {
 820   GtkPaned *paned = GTK_PANED (widget);
 821
 822   if (!paned->in_drag &&
 823       (event->window == paned->handle) && (event->button == 1))
 824     {
 825       paned->in_drag = TRUE;
 826
 827       /* We need a server grab here, not gtk_grab_add(), since
 828        * we don't want to pass events on to the widget's children */
 829       gdk_pointer_grab (paned->handle, FALSE,
 830                         GDK_POINTER_MOTION_HINT_MASK
 831                         | GDK_BUTTON1_MOTION_MASK
 832                         | GDK_BUTTON_RELEASE_MASK
 833                         | GDK_ENTER_NOTIFY_MASK
 834                         | GDK_LEAVE_NOTIFY_MASK,
 835                         NULL, NULL,
 836                         event->time);
 837
 838       if (paned->orientation == GTK_ORIENTATION_HORIZONTAL)
 839         paned->drag_pos = event->y;
 840       else
 841         paned->drag_pos = event->x;
 842
 843       return TRUE;
 844     }
 845
 846   return FALSE;
 847 }
 848
 849 static gboolean
 850 gtk_paned_button_release (GtkWidget      *widget,
 851                           GdkEventButton *event)
 852 {
 853   GtkPaned *paned = GTK_PANED (widget);
 854
 855   if (paned->in_drag && (event->button == 1))
 856     {
 857       paned->in_drag = FALSE;
 858       paned->drag_pos = -1;
 859       paned->position_set = TRUE;
 860       gdk_display_pointer_ungrab (gtk_widget_get_display (widget),
 861                                   event->time);
 862       return TRUE;
 863     }
 864
 865   return FALSE;
 866 }
 867
 868 static gboolean
 869 gtk_paned_motion (GtkWidget      *widget,
 870                   GdkEventMotion *event)
 871 {
 872   GtkPaned *paned = GTK_PANED (widget);
 873
 874   if (paned->in_drag)
 875     {
 876       update_drag (paned);
 877       return TRUE;
 878     }
 879
 880   return FALSE;
 881 }
 882
 883 void
 884 gtk_paned_add1 (GtkPaned  *paned,
 885                 GtkWidget *widget)
 886 {
 887   gtk_paned_pack1 (paned, widget, FALSE, TRUE);
 888 }
 889
 890 void
 891 gtk_paned_add2 (GtkPaned  *paned,
 892                 GtkWidget *widget)
 893 {
 894   gtk_paned_pack2 (paned, widget, TRUE, TRUE);
 895 }
 896
 897 void
 898 gtk_paned_pack1 (GtkPaned  *paned,
 899                  GtkWidget *child,
 900                  gboolean   resize,
 901                  gboolean   shrink)
 902 {
 903   g_return_if_fail (GTK_IS_PANED (paned));
 904   g_return_if_fail (GTK_IS_WIDGET (child));
 905
 906   if (!paned->child1)
 907     {
 908       paned->child1 = child;
 909       paned->child1_resize = resize;
 910       paned->child1_shrink = shrink;
 911
 912       gtk_widget_set_parent (child, GTK_WIDGET (paned));
 913     }
 914 }
 915
 916 void
 917 gtk_paned_pack2 (GtkPaned  *paned,
 918                  GtkWidget *child,
 919                  gboolean   resize,
 920                  gboolean   shrink)
 921 {
 922   g_return_if_fail (GTK_IS_PANED (paned));
 923   g_return_if_fail (GTK_IS_WIDGET (child));
 924
 925   if (!paned->child2)
 926     {
 927       paned->child2 = child;
 928       paned->child2_resize = resize;
 929       paned->child2_shrink = shrink;
 930
 931       gtk_widget_set_parent (child, GTK_WIDGET (paned));
 932     }
 933 }
 934
 935
 936 static void
 937 gtk_paned_add (GtkContainer *container,
 938                GtkWidget    *widget)
 939 {
 940   GtkPaned *paned;
 941
 942   g_return_if_fail (GTK_IS_PANED (container));
 943
 944   paned = GTK_PANED (container);
 945
 946   if (!paned->child1)
 947     gtk_paned_add1 (paned, widget);
 948   else if (!paned->child2)
 949     gtk_paned_add2 (paned, widget);
 950 }
 951
 952 static void
 953 gtk_paned_remove (GtkContainer *container,
 954                   GtkWidget    *widget)
 955 {
 956   GtkPaned *paned;
 957   gboolean was_visible;
 958
 959   paned = GTK_PANED (container);
 960   was_visible = GTK_WIDGET_VISIBLE (widget);
 961
 962   if (paned->child1 == widget)
 963     {
 964       gtk_widget_unparent (widget);
 965
 966       paned->child1 = NULL;
 967
 968       if (was_visible && GTK_WIDGET_VISIBLE (container))
 969         gtk_widget_queue_resize (GTK_WIDGET (container));
 970     }
 971   else if (paned->child2 == widget)
 972     {
 973       gtk_widget_unparent (widget);
 974
 975       paned->child2 = NULL;
 976
 977       if (was_visible && GTK_WIDGET_VISIBLE (container))
 978         gtk_widget_queue_resize (GTK_WIDGET (container));
 979     }
 980 }
 981
 982 static void
 983 gtk_paned_forall (GtkContainer *container,
 984                   gboolean      include_internals,
 985                   GtkCallback   callback,
 986                   gpointer      callback_data)
 987 {
 988   GtkPaned *paned;
 989
 990   g_return_if_fail (callback != NULL);
 991
 992   paned = GTK_PANED (container);
 993
 994   if (paned->child1)
 995     (*callback) (paned->child1, callback_data);
 996   if (paned->child2)
 997     (*callback) (paned->child2, callback_data);
 998 }
 999
1000 /**
1001  * gtk_paned_get_position:
1002  * @paned: a #GtkPaned widget
1003  *
1004  * Obtains the position of the divider between the two panes.
1005  *
1006  * Return value: position of the divider
1007  **/
1008 gint
1009 gtk_paned_get_position (GtkPaned  *paned)
1010 {
1011   g_return_val_if_fail (GTK_IS_PANED (paned), 0);
1012
1013   return paned->child1_size;
1014 }
1015
1016 /**
1017  * gtk_paned_set_position:
1018  * @paned: a #GtkPaned widget
1019  * @position: pixel position of divider, a negative value means that the position
1020  *            is unset.
1021  *
1022  * Sets the position of the divider between the two panes.
1023  **/
1024 void
1025 gtk_paned_set_position (GtkPaned *paned,
1026                         gint      position)
1027 {
1028   GObject *object;
1029
1030   g_return_if_fail (GTK_IS_PANED (paned));
1031
1032   object = G_OBJECT (paned);
1033
1034   if (position >= 0)
1035     {
1036       /* We don't clamp here - the assumption is that
1037        * if the total allocation changes at the same time
1038        * as the position, the position set is with reference
1039        * to the new total size. If only the position changes,
1040        * then clamping will occur in gtk_paned_compute_position()
1041        */
1042
1043       paned->child1_size = position;
1044       paned->position_set = TRUE;
1045     }
1046   else
1047     {
1048       paned->position_set = FALSE;
1049     }
1050
1051   g_object_freeze_notify (object);
1052   g_object_notify (object, "position");
1053   g_object_notify (object, "position_set");
1054   g_object_thaw_notify (object);
1055
1056   gtk_widget_queue_resize (GTK_WIDGET (paned));
1057 }
1058
1059 void
1060 gtk_paned_compute_position (GtkPaned *paned,
1061                             gint      allocation,
1062                             gint      child1_req,
1063                             gint      child2_req)
1064 {
1065   gint old_position;
1066
1067   g_return_if_fail (GTK_IS_PANED (paned));
1068
1069   old_position = paned->child1_size;
1070
1071   paned->min_position = paned->child1_shrink ? 0 : child1_req;
1072
1073   paned->max_position = allocation;
1074   if (!paned->child2_shrink)
1075     paned->max_position = MAX (1, paned->max_position - child2_req);
1076
1077   if (!paned->position_set)
1078     {
1079       if (paned->child1_resize && !paned->child2_resize)
1080         paned->child1_size = MAX (0, allocation - child2_req);
1081       else if (!paned->child1_resize && paned->child2_resize)
1082         paned->child1_size = child1_req;
1083       else if (child1_req + child2_req != 0)
1084         paned->child1_size = allocation * ((gdouble)child1_req / (child1_req + child2_req));
1085       else
1086         paned->child1_size = allocation * 0.5;
1087     }
1088   else
1089     {
1090       /* If the position was set before the initial allocation.
1091        * (paned->last_allocation <= 0) just clamp it and leave it.
1092        */
1093       if (paned->last_allocation > 0)
1094         {
1095           if (paned->child1_resize && !paned->child2_resize)
1096             paned->child1_size += allocation - paned->last_allocation;
1097           else if (!(!paned->child1_resize && paned->child2_resize))
1098             paned->child1_size = allocation * ((gdouble) paned->child1_size / (paned->last_allocation));
1099         }
1100     }
1101
1102   paned->child1_size = CLAMP (paned->child1_size,
1103                               paned->min_position,
1104                               paned->max_position);
1105
1106   gtk_widget_set_child_visible (paned->child1, paned->child1_size != 0);
1107   gtk_widget_set_child_visible (paned->child2, paned->child1_size != allocation);
1108
1109   if (paned->child1_size != old_position)
1110     g_object_notify (G_OBJECT (paned), "position");
1111
1112   paned->last_allocation = allocation;
1113 }
1114
1115 static void
1116 gtk_paned_set_saved_focus (GtkPaned *paned, GtkWidget *widget)
1117 {
1118   if (paned->priv->saved_focus)
1119     g_object_remove_weak_pointer (G_OBJECT (paned->priv->saved_focus),
1120                                   (gpointer *)&(paned->priv->saved_focus));
1121
1122   paned->priv->saved_focus = widget;
1123
1124   if (paned->priv->saved_focus)
1125     g_object_add_weak_pointer (G_OBJECT (paned->priv->saved_focus),
1126                                (gpointer *)&(paned->priv->saved_focus));
1127 }
1128
1129 static void
1130 gtk_paned_set_first_paned (GtkPaned *paned, GtkPaned *first_paned)
1131 {
1132   if (paned->priv->first_paned)
1133     g_object_remove_weak_pointer (G_OBJECT (paned->priv->first_paned),
1134                                   (gpointer *)&(paned->priv->first_paned));
1135
1136   paned->priv->first_paned = first_paned;
1137
1138   if (paned->priv->first_paned)
1139     g_object_add_weak_pointer (G_OBJECT (paned->priv->first_paned),
1140                                (gpointer *)&(paned->priv->first_paned));
1141 }
1142
1143 static void
1144 gtk_paned_set_last_child1_focus (GtkPaned *paned, GtkWidget *widget)
1145 {
1146   if (paned->last_child1_focus)
1147     g_object_remove_weak_pointer (G_OBJECT (paned->last_child1_focus),
1148                                   (gpointer *)&(paned->last_child1_focus));
1149
1150   paned->last_child1_focus = widget;
1151
1152   if (paned->last_child1_focus)
1153     g_object_add_weak_pointer (G_OBJECT (paned->last_child1_focus),
1154                                (gpointer *)&(paned->last_child1_focus));
1155 }
1156
1157 static void
1158 gtk_paned_set_last_child2_focus (GtkPaned *paned, GtkWidget *widget)
1159 {
1160   if (paned->last_child2_focus)
1161     g_object_remove_weak_pointer (G_OBJECT (paned->last_child2_focus),
1162                                   (gpointer *)&(paned->last_child2_focus));
1163
1164   paned->last_child2_focus = widget;
1165
1166   if (paned->last_child2_focus)
1167     g_object_add_weak_pointer (G_OBJECT (paned->last_child2_focus),
1168                                (gpointer *)&(paned->last_child2_focus));
1169 }
1170
1171 static GtkWidget *
1172 paned_get_focus_widget (GtkPaned *paned)
1173 {
1174   GtkWidget *toplevel;
1175
1176   toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
1177   if (GTK_WIDGET_TOPLEVEL (toplevel))
1178     return GTK_WINDOW (toplevel)->focus_widget;
1179
1180   return NULL;
1181 }
1182
1183 static void
1184 gtk_paned_set_focus_child (GtkContainer *container,
1185                            GtkWidget    *focus_child)
1186 {
1187   GtkPaned *paned;
1188
1189   g_return_if_fail (GTK_IS_PANED (container));
1190
1191   paned = GTK_PANED (container);
1192
1193   if (focus_child == NULL)
1194     {
1195       GtkWidget *last_focus;
1196       GtkWidget *w;
1197
1198       last_focus = paned_get_focus_widget (paned);
1199
1200       if (last_focus)
1201         {
1202           /* If there is one or more paned widgets between us and the
1203            * focus widget, we want the topmost of those as last_focus
1204            */
1205           for (w = last_focus; w != GTK_WIDGET (paned); w = w->parent)
1206             if (GTK_IS_PANED (w))
1207               last_focus = w;
1208
1209           if (container->focus_child == paned->child1)
1210             gtk_paned_set_last_child1_focus (paned, last_focus);
1211           else if (container->focus_child == paned->child2)
1212             gtk_paned_set_last_child2_focus (paned, last_focus);
1213         }
1214     }
1215
1216   if (parent_class->set_focus_child)
1217     (* parent_class->set_focus_child) (container, focus_child);
1218 }
1219
1220 static void
1221 gtk_paned_get_cycle_chain (GtkPaned          *paned,
1222                            GtkDirectionType   direction,
1223                            GList            **widgets)
1224 {
1225   GtkContainer *container = GTK_CONTAINER (paned);
1226   GtkWidget *ancestor = NULL;
1227   GList *temp_list = NULL;
1228   GList *list;
1229
1230   if (paned->in_recursion)
1231     return;
1232
1233   g_assert (widgets != NULL);
1234
1235   if (paned->last_child1_focus &&
1236       !gtk_widget_is_ancestor (paned->last_child1_focus, GTK_WIDGET (paned)))
1237     {
1238       gtk_paned_set_last_child1_focus (paned, NULL);
1239     }
1240
1241   if (paned->last_child2_focus &&
1242       !gtk_widget_is_ancestor (paned->last_child2_focus, GTK_WIDGET (paned)))
1243     {
1244       gtk_paned_set_last_child2_focus (paned, NULL);
1245     }
1246
1247   if (GTK_WIDGET (paned)->parent)
1248     ancestor = gtk_widget_get_ancestor (GTK_WIDGET (paned)->parent, GTK_TYPE_PANED);
1249
1250   /* The idea here is that temp_list is a list of widgets we want to cycle
1251    * to. The list is prioritized so that the first element is our first
1252    * choice, the next our second, and so on.
1253    *
1254    * We can't just use g_list_reverse(), because we want to try
1255    * paned->last_child?_focus before paned->child?, both when we
1256    * are going forward and backward.
1257    */
1258   if (direction == GTK_DIR_TAB_FORWARD)
1259     {
1260       if (container->focus_child == paned->child1)
1261         {
1262           temp_list = g_list_append (temp_list, paned->last_child2_focus);
1263           temp_list = g_list_append (temp_list, paned->child2);
1264           temp_list = g_list_append (temp_list, ancestor);
1265         }
1266       else if (container->focus_child == paned->child2)
1267         {
1268           temp_list = g_list_append (temp_list, ancestor);
1269           temp_list = g_list_append (temp_list, paned->last_child1_focus);
1270           temp_list = g_list_append (temp_list, paned->child1);
1271         }
1272       else
1273         {
1274           temp_list = g_list_append (temp_list, paned->last_child1_focus);
1275           temp_list = g_list_append (temp_list, paned->child1);
1276           temp_list = g_list_append (temp_list, paned->last_child2_focus);
1277           temp_list = g_list_append (temp_list, paned->child2);
1278           temp_list = g_list_append (temp_list, ancestor);
1279         }
1280     }
1281   else
1282     {
1283       if (container->focus_child == paned->child1)
1284         {
1285           temp_list = g_list_append (temp_list, ancestor);
1286           temp_list = g_list_append (temp_list, paned->last_child2_focus);
1287           temp_list = g_list_append (temp_list, paned->child2);
1288         }
1289       else if (container->focus_child == paned->child2)
1290         {
1291           temp_list = g_list_append (temp_list, paned->last_child1_focus);
1292           temp_list = g_list_append (temp_list, paned->child1);
1293           temp_list = g_list_append (temp_list, ancestor);
1294         }
1295       else
1296         {
1297           temp_list = g_list_append (temp_list, paned->last_child2_focus);
1298           temp_list = g_list_append (temp_list, paned->child2);
1299           temp_list = g_list_append (temp_list, paned->last_child1_focus);
1300           temp_list = g_list_append (temp_list, paned->child1);
1301           temp_list = g_list_append (temp_list, ancestor);
1302         }
1303     }
1304
1305   /* Walk the list and expand all the paned widgets. */
1306   for (list = temp_list; list != NULL; list = list->next)
1307     {
1308       GtkWidget *widget = list->data;
1309
1310       if (widget)
1311         {
1312           if (GTK_IS_PANED (widget))
1313             {
1314               paned->in_recursion = TRUE;
1315               gtk_paned_get_cycle_chain (GTK_PANED (widget), direction, widgets);
1316               paned->in_recursion = FALSE;
1317             }
1318           else
1319             {
1320               *widgets = g_list_append (*widgets, widget);
1321             }
1322         }
1323     }
1324
1325   g_list_free (temp_list);
1326 }
1327
1328 static gboolean
1329 gtk_paned_cycle_child_focus (GtkPaned *paned,
1330                              gboolean  reversed)
1331 {
1332   GList *cycle_chain = NULL;
1333   GList *list;
1334
1335   GtkDirectionType direction = reversed? GTK_DIR_TAB_BACKWARD : GTK_DIR_TAB_FORWARD;
1336
1337   /* ignore f6 if the handle is focused */
1338   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1339     return TRUE;
1340
1341   /* we can't just let the event propagate up the hierarchy,
1342    * because the paned will want to cycle focus _unless_ an
1343    * ancestor paned handles the event
1344    */
1345   gtk_paned_get_cycle_chain (paned, direction, &cycle_chain);
1346
1347   for (list = cycle_chain; list != NULL; list = list->next)
1348     if (gtk_widget_child_focus (GTK_WIDGET (list->data), direction))
1349       break;
1350
1351   g_list_free (cycle_chain);
1352
1353   return TRUE;
1354 }
1355
1356 static void
1357 get_child_panes (GtkWidget  *widget,
1358                  GList     **panes)
1359 {
1360   if (GTK_IS_PANED (widget))
1361     {
1362       GtkPaned *paned = GTK_PANED (widget);
1363
1364       get_child_panes (paned->child1, panes);
1365       *panes = g_list_prepend (*panes, widget);
1366       get_child_panes (paned->child2, panes);
1367     }
1368   else if (GTK_IS_CONTAINER (widget))
1369     {
1370       gtk_container_foreach (GTK_CONTAINER (widget),
1371                              (GtkCallback)get_child_panes, panes);
1372     }
1373 }
1374
1375 static GList *
1376 get_all_panes (GtkPaned *paned)
1377 {
1378   GtkPaned *topmost = NULL;
1379   GList *result = NULL;
1380   GtkWidget *w;
1381
1382   for (w = GTK_WIDGET (paned); w != NULL; w = w->parent)
1383     {
1384       if (GTK_IS_PANED (w))
1385         topmost = GTK_PANED (w);
1386     }
1387
1388   g_assert (topmost);
1389
1390   get_child_panes (GTK_WIDGET (topmost), &result);
1391
1392   return g_list_reverse (result);
1393 }
1394
1395 static void
1396 gtk_paned_find_neighbours (GtkPaned  *paned,
1397                            GtkPaned **next,
1398                            GtkPaned **prev)
1399 {
1400   GList *all_panes;
1401   GList *this_link;
1402
1403   all_panes = get_all_panes (paned);
1404   g_assert (all_panes);
1405
1406   this_link = g_list_find (all_panes, paned);
1407
1408   g_assert (this_link);
1409
1410   if (this_link->next)
1411     *next = this_link->next->data;
1412   else
1413     *next = all_panes->data;
1414
1415   if (this_link->prev)
1416     *prev = this_link->prev->data;
1417   else
1418     *prev = g_list_last (all_panes)->data;
1419
1420   g_list_free (all_panes);
1421 }
1422
1423 static gboolean
1424 gtk_paned_move_handle (GtkPaned      *paned,
1425                        GtkScrollType  scroll)
1426 {
1427   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1428     {
1429       gint old_position;
1430       gint new_position;
1431
1432       enum {
1433         SINGLE_STEP_SIZE = 1,
1434         PAGE_STEP_SIZE   = 75
1435       };
1436
1437       old_position = gtk_paned_get_position (paned);
1438
1439       switch (scroll)
1440         {
1441         case GTK_SCROLL_STEP_LEFT:
1442         case GTK_SCROLL_STEP_UP:
1443         case GTK_SCROLL_STEP_BACKWARD:
1444           new_position = old_position - SINGLE_STEP_SIZE;
1445           break;
1446
1447         case GTK_SCROLL_STEP_RIGHT:
1448         case GTK_SCROLL_STEP_DOWN:
1449         case GTK_SCROLL_STEP_FORWARD:
1450           new_position = old_position + SINGLE_STEP_SIZE;
1451           break;
1452
1453         case GTK_SCROLL_PAGE_LEFT:
1454         case GTK_SCROLL_PAGE_UP:
1455         case GTK_SCROLL_PAGE_BACKWARD:
1456           new_position = old_position - PAGE_STEP_SIZE;
1457           break;
1458
1459         case GTK_SCROLL_PAGE_RIGHT:
1460         case GTK_SCROLL_PAGE_DOWN:
1461         case GTK_SCROLL_PAGE_FORWARD:
1462           new_position = old_position + PAGE_STEP_SIZE;
1463           break;
1464
1465         case GTK_SCROLL_START:
1466           new_position = paned->min_position;
1467           break;
1468
1469         case GTK_SCROLL_END:
1470           new_position = paned->max_position;
1471           break;
1472
1473         default:
1474           new_position = old_position;
1475           break;
1476         }
1477
1478       new_position = CLAMP (new_position, paned->min_position, paned->max_position);
1479
1480       if (old_position != new_position)
1481         gtk_paned_set_position (paned, new_position);
1482
1483       return TRUE;
1484     }
1485
1486   return FALSE;
1487 }
1488
1489 static void
1490 gtk_paned_restore_focus (GtkPaned *paned)
1491 {
1492   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1493     {
1494       if (paned->priv->saved_focus &&
1495           GTK_WIDGET_SENSITIVE (paned->priv->saved_focus))
1496         {
1497           gtk_widget_grab_focus (paned->priv->saved_focus);
1498         }
1499       else
1500         {
1501           /* the saved focus is somehow not available for focusing,
1502            * try
1503            *   1) tabbing into the paned widget
1504            * if that didn't work,
1505            *   2) unset focus for the window if there is one
1506            */
1507
1508           if (!gtk_widget_child_focus (GTK_WIDGET (paned), GTK_DIR_TAB_FORWARD))
1509             {
1510               GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
1511
1512               if (GTK_IS_WINDOW (toplevel))
1513                 gtk_window_set_focus (GTK_WINDOW (toplevel), NULL);
1514             }
1515         }
1516
1517       gtk_paned_set_saved_focus (paned, NULL);
1518       gtk_paned_set_first_paned (paned, NULL);
1519     }
1520 }
1521
1522 static gboolean
1523 gtk_paned_accept_position (GtkPaned *paned)
1524 {
1525   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1526     {
1527       paned->original_position = -1;
1528       gtk_paned_restore_focus (paned);
1529
1530       return TRUE;
1531     }
1532
1533   return FALSE;
1534 }
1535
1536
1537 static gboolean
1538 gtk_paned_cancel_position (GtkPaned *paned)
1539 {
1540   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1541     {
1542       if (paned->original_position != -1)
1543         {
1544           gtk_paned_set_position (paned, paned->original_position);
1545           paned->original_position = -1;
1546         }
1547
1548       gtk_paned_restore_focus (paned);
1549       return TRUE;
1550     }
1551
1552   return FALSE;
1553 }
1554
1555 static gboolean
1556 gtk_paned_cycle_handle_focus (GtkPaned *paned,
1557                               gboolean  reversed)
1558 {
1559   GtkPaned *next, *prev;
1560
1561   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1562     {
1563       GtkPaned *focus = NULL;
1564
1565       if (!paned->priv->first_paned)
1566         {
1567           /* The first_pane has disappeared. As an ad-hoc solution,
1568            * we make the currently focused paned the first_paned. To the
1569            * user this will seem like the paned cycling has been reset.
1570            */
1571
1572           gtk_paned_set_first_paned (paned, paned);
1573         }
1574
1575       gtk_paned_find_neighbours (paned, &next, &prev);
1576
1577       if (reversed && prev &&
1578           prev != paned && paned != paned->priv->first_paned)
1579         {
1580           focus = prev;
1581         }
1582       else if (!reversed && next &&
1583                next != paned && next != paned->priv->first_paned)
1584         {
1585           focus = next;
1586         }
1587       else
1588         {
1589           gtk_paned_accept_position (paned);
1590           return TRUE;
1591         }
1592
1593       g_assert (focus);
1594
1595       gtk_paned_set_saved_focus (focus, paned->priv->saved_focus);
1596       gtk_paned_set_first_paned (focus, paned->priv->first_paned);
1597
1598       gtk_paned_set_saved_focus (paned, NULL);
1599       gtk_paned_set_first_paned (paned, NULL);
1600
1601       gtk_widget_grab_focus (GTK_WIDGET (focus));
1602
1603       if (!gtk_widget_is_focus (GTK_WIDGET (paned)))
1604         {
1605           paned->original_position = -1;
1606           focus->original_position = gtk_paned_get_position (focus);
1607         }
1608     }
1609   else
1610     {
1611       GtkContainer *container = GTK_CONTAINER (paned);
1612       GtkPaned *focus;
1613       GtkPaned *first;
1614       GtkPaned *prev, *next;
1615       GtkWidget *toplevel;
1616
1617       gtk_paned_find_neighbours (paned, &next, &prev);
1618
1619       if (container->focus_child == paned->child1)
1620         {
1621           if (reversed)
1622             {
1623               focus = prev;
1624               first = paned;
1625             }
1626           else
1627             {
1628               focus = paned;
1629               first = paned;
1630             }
1631         }
1632       else if (container->focus_child == paned->child2)
1633         {
1634           if (reversed)
1635             {
1636               focus = paned;
1637               first = next;
1638             }
1639           else
1640             {
1641               focus = next;
1642               first = next;
1643             }
1644         }
1645       else
1646         {
1647           /* Focus is not inside this paned, and we don't have focus.
1648            * Presumably this happened because the application wants us
1649            * to start keyboard navigating.
1650            */
1651           focus = paned;
1652
1653           if (reversed)
1654             first = paned;
1655           else
1656             first = next;
1657         }
1658
1659       toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
1660
1661       if (GTK_IS_WINDOW (toplevel))
1662         gtk_paned_set_saved_focus (focus, GTK_WINDOW (toplevel)->focus_widget);
1663       gtk_paned_set_first_paned (focus, first);
1664       focus->original_position = gtk_paned_get_position (focus);
1665
1666       gtk_widget_grab_focus (GTK_WIDGET (focus));
1667    }
1668
1669   return TRUE;
1670 }
1671
1672 static gboolean
1673 gtk_paned_toggle_handle_focus (GtkPaned *paned)
1674 {
1675   /* This function/signal has the wrong name. It is called when you
1676    * press Tab or Shift-Tab and what we do is act as if
1677    * the user pressed Return and then Tab or Shift-Tab
1678    */
1679   if (gtk_widget_is_focus (GTK_WIDGET (paned)))
1680     gtk_paned_accept_position (paned);
1681
1682   return FALSE;
1683 }