pintos-os.org Git - pspp/blob - lib/gtk-contrib/gtkxpaned.c

   1 /*******************************************************************************
   2  **3456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789
   3  **      10        20        30        40        50        60        70        80
   4  **
   5  **  library for GtkXPaned-widget, a 2x2 grid-like variation of GtkPaned of gtk+
   6  **  Copyright (C) 2012, 2013 Free Software Foundation, Inc.
   7  **  Copyright (C) 2005-2006 Mirco "MacSlow" Müller <macslow@bangang.de>
   8  **
   9  **  This library is free software; you can redistribute it and/or
  10  **  modify it under the terms of the GNU Lesser General Public
  11  **  License as published by the Free Software Foundation; either
  12  **  version 2.1 of the License, or (at your option) any later version.
  13  **
  14  **  This library is distributed in the hope that it will be useful,
  15  **  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  **  Lesser General Public License for more details.
  18  **
  19  **  You should have received a copy of the GNU Lesser General Public
  20  **  License along with this library; if not, write to the Free Software
  21  **  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  **
  23  **  GtkXPaned is based on GtkPaned which was done by...
  24  **
  25  **  "Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald"
  26  **
  27  **  and later modified by...
  28  **
  29  **  "the GTK+ Team and others 1997-2000"
  30  **
  31  *******************************************************************************/
  32
  33 #include <config.h>
  34 #include "gtkxpaned.h"
  35
  36 #include <gtk/gtk.h>
  37 #include <ui/gui/psppire-marshal.h>
  38 #include <gdk/gdkkeysyms.h>
  39 #include <gdk/gdkkeysyms-compat.h>
  40
  41 enum WidgetProperties
  42   {
  43     PROP_0,
  44     PROP_X_POSITION,
  45     PROP_Y_POSITION,
  46     PROP_POSITION_SET,
  47     PROP_MIN_X_POSITION,
  48     PROP_MIN_Y_POSITION,
  49     PROP_MAX_X_POSITION,
  50     PROP_MAX_Y_POSITION
  51   };
  52
  53 enum ChildProperties
  54   {
  55     CHILD_PROP_0,
  56     CHILD_PROP_RESIZE,
  57     CHILD_PROP_SHRINK
  58   };
  59
  60 enum WidgetSignals
  61   {
  62     CYCLE_CHILD_FOCUS,
  63     TOGGLE_HANDLE_FOCUS,
  64     MOVE_HANDLE,
  65     CYCLE_HANDLE_FOCUS,
  66     ACCEPT_POSITION,
  67     CANCEL_POSITION,
  68     LAST_SIGNAL
  69   };
  70
  71 static void gtk_xpaned_class_init (GtkXPanedClass * klass);
  72
  73 static void gtk_xpaned_init (GtkXPaned * xpaned);
  74
  75 static void
  76 gtk_xpaned_get_preferred_width (GtkWidget *widget,
  77                                 gint      *minimal_width,
  78                                 gint      *natural_width)
  79 {
  80   GtkXPaned *xpaned = GTK_XPANED (widget);
  81   gint tl[2], tr[2], bl[2], br[2];
  82   gint overhead;
  83   gint w[2];
  84   int i;
  85
  86   if (xpaned->top_left_child
  87       && gtk_widget_get_visible (xpaned->top_left_child))
  88     gtk_widget_get_preferred_width (xpaned->top_left_child, &tl[0], &tl[1]);
  89   else
  90     tl[0] = tl[1] = 0;
  91
  92   if (xpaned->top_right_child
  93       && gtk_widget_get_visible (xpaned->top_right_child))
  94     gtk_widget_get_preferred_width (xpaned->top_right_child, &tr[0], &tr[1]);
  95   else
  96     tr[0] = tr[1] = 0;
  97
  98   if (xpaned->bottom_left_child
  99       && gtk_widget_get_visible (xpaned->bottom_left_child))
 100     gtk_widget_get_preferred_width (xpaned->bottom_left_child, &bl[0], &bl[1]);
 101   else
 102     bl[0] = bl[1] = 0;
 103
 104   if (xpaned->bottom_right_child
 105       && gtk_widget_get_visible (xpaned->bottom_right_child))
 106     gtk_widget_get_preferred_width (xpaned->bottom_right_child,
 107                                     &br[0], &br[1]);
 108   else
 109     br[0] = br[1] = 0;
 110
 111   /* add 2 times the set border-width to the GtkXPaneds requisition */
 112   overhead = gtk_container_get_border_width (GTK_CONTAINER (xpaned)) * 2;
 113
 114   /* also add the handle "thickness" to GtkXPaned's width requisition */
 115   if (xpaned->top_left_child
 116       && gtk_widget_get_visible (xpaned->top_left_child)
 117       && xpaned->top_right_child
 118       && gtk_widget_get_visible (xpaned->top_right_child)
 119       && xpaned->bottom_left_child
 120       && gtk_widget_get_visible (xpaned->bottom_left_child)
 121       && xpaned->bottom_right_child
 122       && gtk_widget_get_visible (xpaned->bottom_right_child))
 123     {
 124       gint handle_size;
 125
 126       gtk_widget_style_get (widget, "handle-size", &handle_size, NULL);
 127       overhead += handle_size;
 128     }
 129
 130   for (i = 0; i < 2; i++)
 131     w[i] = (br[i] ? br[i] : MAX (tl[i] + tr[i], bl[i])) + overhead;
 132
 133   *minimal_width = w[0];
 134   *natural_width = w[1];
 135 }
 136
 137 static void
 138 gtk_xpaned_get_preferred_height (GtkWidget *widget,
 139                                 gint      *minimal_height,
 140                                 gint      *natural_height)
 141 {
 142   GtkXPaned *xpaned = GTK_XPANED (widget);
 143   gint tl[2], tr[2], bl[2], br[2];
 144   gint overhead;
 145   gint h[2];
 146   int i;
 147
 148   if (xpaned->top_left_child
 149       && gtk_widget_get_visible (xpaned->top_left_child))
 150     gtk_widget_get_preferred_height (xpaned->top_left_child, &tl[0], &tl[1]);
 151   else
 152     tl[0] = tl[1] = 0;
 153
 154   if (xpaned->top_right_child
 155       && gtk_widget_get_visible (xpaned->top_right_child))
 156     gtk_widget_get_preferred_height (xpaned->top_right_child, &tr[0], &tr[1]);
 157   else
 158     tr[0] = tr[1] = 0;
 159
 160   if (xpaned->bottom_left_child
 161       && gtk_widget_get_visible (xpaned->bottom_left_child))
 162     gtk_widget_get_preferred_height (xpaned->bottom_left_child,
 163                                      &bl[0], &bl[1]);
 164   else
 165     bl[0] = bl[1] = 0;
 166
 167   if (xpaned->bottom_right_child
 168       && gtk_widget_get_visible (xpaned->bottom_right_child))
 169     gtk_widget_get_preferred_height (xpaned->bottom_right_child,
 170                                     &br[0], &br[1]);
 171   else
 172     br[0] = br[1] = 0;
 173
 174   /* add 2 times the set border-width to the GtkXPaneds requisition */
 175   overhead = gtk_container_get_border_width (GTK_CONTAINER (xpaned)) * 2;
 176
 177   /* also add the handle "thickness" to GtkXPaned's height-requisition */
 178   if (xpaned->top_left_child
 179       && gtk_widget_get_visible (xpaned->top_left_child)
 180       && xpaned->top_right_child
 181       && gtk_widget_get_visible (xpaned->top_right_child)
 182       && xpaned->bottom_left_child
 183       && gtk_widget_get_visible (xpaned->bottom_left_child)
 184       && xpaned->bottom_right_child
 185       && gtk_widget_get_visible (xpaned->bottom_right_child))
 186     {
 187       gint handle_size;
 188
 189       gtk_widget_style_get (widget, "handle-size", &handle_size, NULL);
 190       overhead += handle_size;
 191     }
 192
 193   for (i = 0; i < 2; i++)
 194     h[i] = (br[i] ? br[i] : bl[i] + MAX (tl[i], tr[i])) + overhead;
 195
 196   *minimal_height = h[0];
 197   *natural_height = h[1];
 198 }
 199
 200 static void gtk_xpaned_size_allocate (GtkWidget * widget,
 201                                       GtkAllocation * allocation);
 202
 203 static void gtk_xpaned_set_property (GObject * object,
 204                                      guint prop_id,
 205                                      const GValue * value,
 206                                      GParamSpec * pspec);
 207
 208 static void gtk_xpaned_get_property (GObject * object,
 209                                      guint prop_id,
 210                                      GValue * value, GParamSpec * pspec);
 211
 212 static void gtk_xpaned_set_child_property (GtkContainer * container,
 213                                            GtkWidget * child,
 214                                            guint property_id,
 215                                            const GValue * value,
 216                                            GParamSpec * pspec);
 217
 218 static void gtk_xpaned_get_child_property (GtkContainer * container,
 219                                            GtkWidget * child,
 220                                            guint property_id,
 221                                            GValue * value,
 222                                            GParamSpec * pspec);
 223
 224 static void gtk_xpaned_finalize (GObject * object);
 225
 226 static void gtk_xpaned_realize (GtkWidget * widget);
 227
 228 static void gtk_xpaned_unrealize (GtkWidget * widget);
 229
 230 static void gtk_xpaned_map (GtkWidget * widget);
 231
 232 static void gtk_xpaned_unmap (GtkWidget * widget);
 233
 234 static gboolean gtk_xpaned_draw (GtkWidget * widget,
 235                                    cairo_t *ct);
 236
 237 static gboolean gtk_xpaned_enter (GtkWidget * widget,
 238                                   GdkEventCrossing * event);
 239
 240 static gboolean gtk_xpaned_leave (GtkWidget * widget,
 241                                   GdkEventCrossing * event);
 242
 243 static gboolean gtk_xpaned_button_press (GtkWidget * widget,
 244                                          GdkEventButton * event);
 245
 246 static gboolean gtk_xpaned_button_release (GtkWidget * widget,
 247                                            GdkEventButton * event);
 248
 249 static gboolean gtk_xpaned_motion (GtkWidget * widget,
 250                                    GdkEventMotion * event);
 251
 252 static gboolean gtk_xpaned_focus (GtkWidget * widget,
 253                                   GtkDirectionType direction);
 254
 255 static void gtk_xpaned_add (GtkContainer * container, GtkWidget * widget);
 256
 257 static void gtk_xpaned_remove (GtkContainer * container, GtkWidget * widget);
 258
 259 static void gtk_xpaned_forall (GtkContainer * container,
 260                                gboolean include_internals,
 261                                GtkCallback callback, gpointer callback_data);
 262
 263 static void gtk_xpaned_set_focus_child (GtkContainer * container,
 264                                         GtkWidget * child);
 265
 266 static void gtk_xpaned_set_saved_focus (GtkXPaned * xpaned,
 267                                         GtkWidget * widget);
 268
 269 static void gtk_xpaned_set_first_xpaned (GtkXPaned * xpaned,
 270                                          GtkXPaned * first_xpaned);
 271
 272 static void gtk_xpaned_set_last_top_left_child_focus (GtkXPaned * xpaned,
 273                                                       GtkWidget * widget);
 274
 275 static void gtk_xpaned_set_last_top_right_child_focus (GtkXPaned * xpaned,
 276                                                        GtkWidget * widget);
 277
 278 static void gtk_xpaned_set_last_bottom_left_child_focus (GtkXPaned * xpaned,
 279                                                          GtkWidget * widget);
 280
 281 static void gtk_xpaned_set_last_bottom_right_child_focus (GtkXPaned * xpaned,
 282                                                           GtkWidget * widget);
 283
 284 static gboolean gtk_xpaned_cycle_child_focus (GtkXPaned * xpaned,
 285                                               gboolean reverse);
 286
 287 static gboolean gtk_xpaned_cycle_handle_focus (GtkXPaned * xpaned,
 288                                                gboolean reverse);
 289
 290 static gboolean gtk_xpaned_move_handle (GtkXPaned * xpaned,
 291                                         GtkScrollType scroll);
 292
 293 static gboolean gtk_xpaned_accept_position (GtkXPaned * xpaned);
 294
 295 static gboolean gtk_xpaned_cancel_position (GtkXPaned * xpaned);
 296
 297 static gboolean gtk_xpaned_toggle_handle_focus (GtkXPaned * xpaned);
 298
 299 static GType gtk_xpaned_child_type (GtkContainer * container);
 300
 301 static GtkContainerClass *parent_class = NULL;
 302
 303 struct _GtkXPanedPrivate
 304 {
 305   GtkWidget *saved_focus;
 306   GtkXPaned *first_xpaned;
 307 };
 308
 309 GType
 310 gtk_xpaned_get_type (void)
 311 {
 312   static GType xpaned_type = 0;
 313
 314   if (!xpaned_type)
 315     {
 316       static const GTypeInfo xpaned_info = {
 317         sizeof (GtkXPanedClass),
 318         NULL,                   /* base_init */
 319         NULL,                   /* base_finalize */
 320         (GClassInitFunc) gtk_xpaned_class_init,
 321         NULL,                   /* class_finalize */
 322         NULL,                   /* class_data */
 323         sizeof (GtkXPaned),
 324         0,                      /* n_preallocs */
 325         (GInstanceInitFunc) gtk_xpaned_init
 326       };
 327
 328       xpaned_type = g_type_register_static (GTK_TYPE_CONTAINER,
 329                                             "GtkXPaned", &xpaned_info, 0);
 330     }
 331
 332   return xpaned_type;
 333 }
 334
 335 GtkWidget *
 336 gtk_xpaned_new (void)
 337 {
 338   GtkXPaned *xpaned;
 339
 340   xpaned = g_object_new (GTK_TYPE_XPANED, NULL);
 341
 342   return GTK_WIDGET (xpaned);
 343 }
 344
 345 static guint signals[LAST_SIGNAL] = { 0 };
 346
 347 static void
 348 add_tab_bindings (GtkBindingSet * binding_set, GdkModifierType modifiers)
 349 {
 350   gtk_binding_entry_add_signal (binding_set,
 351                                 GDK_Tab, modifiers, "toggle_handle_focus", 0);
 352
 353   gtk_binding_entry_add_signal (binding_set,
 354                                 GDK_KP_Tab,
 355                                 modifiers, "toggle_handle_focus", 0);
 356 }
 357
 358 static void
 359 add_move_binding (GtkBindingSet * binding_set,
 360                   guint keyval, GdkModifierType mask, GtkScrollType scroll)
 361 {
 362   gtk_binding_entry_add_signal (binding_set,
 363                                 keyval,
 364                                 mask,
 365                                 "move_handle",
 366                                 1, GTK_TYPE_SCROLL_TYPE, scroll);
 367 }
 368
 369 static void
 370 gtk_xpaned_class_init (GtkXPanedClass * class)
 371 {
 372   GObjectClass *object_class;
 373   GtkWidgetClass *widget_class;
 374   GtkContainerClass *container_class;
 375   GtkXPanedClass *xpaned_class;
 376   GtkBindingSet *binding_set;
 377
 378   object_class = (GObjectClass *) class;
 379   widget_class = (GtkWidgetClass *) class;
 380   container_class = (GtkContainerClass *) class;
 381   xpaned_class = (GtkXPanedClass *) class;
 382
 383   parent_class = g_type_class_peek_parent (class);
 384
 385   object_class->set_property = gtk_xpaned_set_property;
 386   object_class->get_property = gtk_xpaned_get_property;
 387   object_class->finalize = gtk_xpaned_finalize;
 388
 389   widget_class->realize = gtk_xpaned_realize;
 390   widget_class->unrealize = gtk_xpaned_unrealize;
 391   widget_class->map = gtk_xpaned_map;
 392   widget_class->unmap = gtk_xpaned_unmap;
 393   widget_class->draw = gtk_xpaned_draw;
 394   widget_class->focus = gtk_xpaned_focus;
 395   widget_class->enter_notify_event = gtk_xpaned_enter;
 396   widget_class->leave_notify_event = gtk_xpaned_leave;
 397   widget_class->button_press_event = gtk_xpaned_button_press;
 398   widget_class->button_release_event = gtk_xpaned_button_release;
 399   widget_class->motion_notify_event = gtk_xpaned_motion;
 400   widget_class->get_preferred_width  = gtk_xpaned_get_preferred_width;
 401   widget_class->get_preferred_height = gtk_xpaned_get_preferred_height;
 402
 403   widget_class->size_allocate = gtk_xpaned_size_allocate;
 404
 405   container_class->add = gtk_xpaned_add;
 406   container_class->remove = gtk_xpaned_remove;
 407   container_class->forall = gtk_xpaned_forall;
 408   container_class->child_type = gtk_xpaned_child_type;
 409   container_class->set_focus_child = gtk_xpaned_set_focus_child;
 410   container_class->set_child_property = gtk_xpaned_set_child_property;
 411   container_class->get_child_property = gtk_xpaned_get_child_property;
 412
 413   xpaned_class->cycle_child_focus = gtk_xpaned_cycle_child_focus;
 414   xpaned_class->toggle_handle_focus = gtk_xpaned_toggle_handle_focus;
 415   xpaned_class->move_handle = gtk_xpaned_move_handle;
 416   xpaned_class->cycle_handle_focus = gtk_xpaned_cycle_handle_focus;
 417   xpaned_class->accept_position = gtk_xpaned_accept_position;
 418   xpaned_class->cancel_position = gtk_xpaned_cancel_position;
 419
 420   g_object_class_install_property (object_class,
 421                                    PROP_X_POSITION,
 422                                    g_param_spec_int ("x-position",
 423                                                      ("x-Position"),
 424                                                      ("x-Position of paned separator in pixels (0 means all the way to the left)"),
 425                                                      0,
 426                                                      G_MAXINT,
 427                                                      0,
 428                                                      G_PARAM_READABLE |
 429                                                      G_PARAM_WRITABLE));
 430
 431   g_object_class_install_property (object_class,
 432                                    PROP_Y_POSITION,
 433                                    g_param_spec_int ("y-position",
 434                                                      "y-Position",
 435                                                      "y-Position of paned separator in pixels (0 means all the way to the top)",
 436                                                      0,
 437                                                      G_MAXINT,
 438                                                      0,
 439                                                      G_PARAM_READABLE |
 440                                                      G_PARAM_WRITABLE));
 441
 442   g_object_class_install_property (object_class,
 443                                    PROP_POSITION_SET,
 444                                    g_param_spec_boolean ("position-set",
 445                                                          "Position Set",
 446                                                          "TRUE if the Position property should be used",
 447                                                          FALSE,
 448                                                          G_PARAM_READABLE |
 449                                                          G_PARAM_WRITABLE));
 450
 451   gtk_widget_class_install_style_property (widget_class,
 452                                            g_param_spec_int ("handle-size",
 453                                                              "Handle Size",
 454                                                              "Width of handle",
 455                                                              0,
 456                                                              G_MAXINT,
 457                                                              3,
 458                                                              G_PARAM_READABLE));
 459   /**
 460    * GtkXPaned:min-x-position:
 461    *
 462    * The smallest possible value for the x-position property. This property is derived from the
 463    * size and shrinkability of the widget's children.
 464    *
 465    * Since: 2.4
 466    */
 467   g_object_class_install_property (object_class,
 468                                    PROP_MIN_X_POSITION,
 469                                    g_param_spec_int ("min-x-position",
 470                                                      "Minimal x-Position",
 471                                                      "Smallest possible value for the \"x-position\" property",
 472                                                      0,
 473                                                      G_MAXINT,
 474                                                      0, G_PARAM_READABLE));
 475
 476   /**
 477    * GtkXPaned:min-y-position:
 478    *
 479    * The smallest possible value for the y-position property. This property is derived from the
 480    * size and shrinkability of the widget's children.
 481    *
 482    * Since: 2.4
 483    */
 484   g_object_class_install_property (object_class,
 485                                    PROP_MIN_Y_POSITION,
 486                                    g_param_spec_int ("min-y-position",
 487                                                      "Minimal y-Position",
 488                                                      "Smallest possible value for the \"y-position\" property",
 489                                                      0,
 490                                                      G_MAXINT,
 491                                                      0, G_PARAM_READABLE));
 492
 493   /**
 494    * GtkPaned:max-x-position:
 495    *
 496    * The largest possible value for the x-position property. This property is derived from the
 497    * size and shrinkability of the widget's children.
 498    *
 499    * Since: 2.4
 500    */
 501   g_object_class_install_property (object_class,
 502                                    PROP_MAX_X_POSITION,
 503                                    g_param_spec_int ("max-x-position",
 504                                                      "Maximal x-Position",
 505                                                      "Largest possible value for the \"x-position\" property",
 506                                                      0,
 507                                                      G_MAXINT,
 508                                                      G_MAXINT,
 509                                                      G_PARAM_READABLE));
 510
 511   /**
 512    * GtkPaned:max-y-position:
 513    *
 514    * The largest possible value for the y-position property. This property is derived from the
 515    * size and shrinkability of the widget's children.
 516    *
 517    * Since: 2.4
 518    */
 519   g_object_class_install_property (object_class,
 520                                    PROP_MAX_Y_POSITION,
 521                                    g_param_spec_int ("max-y-position",
 522                                                      "Maximal y-Position",
 523                                                      "Largest possible value for the \"y-position\" property",
 524                                                      0,
 525                                                      G_MAXINT,
 526                                                      G_MAXINT,
 527                                                      G_PARAM_READABLE));
 528
 529   /**
 530    * GtkPaned:resize:
 531    *
 532    * The "resize" child property determines whether the child expands and
 533    * shrinks along with the paned widget.
 534    *
 535    * Since: 2.4
 536    */
 537   gtk_container_class_install_child_property (container_class,
 538                                               CHILD_PROP_RESIZE,
 539                                               g_param_spec_boolean ("resize",
 540                                                                     "Resize",
 541                                                                     "If TRUE, the child expands and shrinks along with the paned widget",
 542                                                                     TRUE,
 543                                                                     G_PARAM_READWRITE));
 544
 545   /**
 546    * GtkPaned:shrink:
 547    *
 548    * The "shrink" child property determines whether the child can be made
 549    * smaller than its requisition.
 550    *
 551    * Since: 2.4
 552    */
 553   gtk_container_class_install_child_property (container_class,
 554                                               CHILD_PROP_SHRINK,
 555                                               g_param_spec_boolean ("shrink",
 556                                                                     "Shrink",
 557                                                                     "If TRUE, the child can be made smaller than its requisition",
 558                                                                     TRUE,
 559                                                                     G_PARAM_READWRITE));
 560
 561   signals[CYCLE_CHILD_FOCUS] = g_signal_new ("cycle-child-focus",
 562                                              G_TYPE_FROM_CLASS (object_class),
 563                                              G_SIGNAL_RUN_LAST |
 564                                              G_SIGNAL_ACTION,
 565                                              G_STRUCT_OFFSET (GtkXPanedClass,
 566                                                               cycle_child_focus),
 567                                              NULL, NULL,
 568                                              psppire_marshal_BOOLEAN__BOOLEAN,
 569                                              G_TYPE_BOOLEAN, 1,
 570                                              G_TYPE_BOOLEAN);
 571
 572   signals[TOGGLE_HANDLE_FOCUS] = g_signal_new ("toggle-handle-focus",
 573                                                G_TYPE_FROM_CLASS
 574                                                (object_class),
 575                                                G_SIGNAL_RUN_LAST |
 576                                                G_SIGNAL_ACTION,
 577                                                G_STRUCT_OFFSET
 578                                                (GtkXPanedClass,
 579                                                 toggle_handle_focus), NULL,
 580                                                NULL,
 581                                                psppire_marshal_BOOLEAN__VOID,
 582                                                G_TYPE_BOOLEAN, 0);
 583
 584   signals[MOVE_HANDLE] = g_signal_new ("move-handle",
 585                                        G_TYPE_FROM_CLASS (object_class),
 586                                        G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 587                                        G_STRUCT_OFFSET (GtkXPanedClass,
 588                                                         move_handle), NULL,
 589                                        NULL, psppire_marshal_BOOLEAN__ENUM,
 590                                        G_TYPE_BOOLEAN, 1,
 591                                        GTK_TYPE_SCROLL_TYPE);
 592
 593   signals[CYCLE_HANDLE_FOCUS] = g_signal_new ("cycle-handle-focus",
 594                                               G_TYPE_FROM_CLASS
 595                                               (object_class),
 596                                               G_SIGNAL_RUN_LAST |
 597                                               G_SIGNAL_ACTION,
 598                                               G_STRUCT_OFFSET (GtkXPanedClass,
 599                                                                cycle_handle_focus),
 600                                               NULL, NULL,
 601                                               psppire_marshal_BOOLEAN__BOOLEAN,
 602                                               G_TYPE_BOOLEAN, 1,
 603                                               G_TYPE_BOOLEAN);
 604
 605   signals[ACCEPT_POSITION] = g_signal_new ("accept-position",
 606                                            G_TYPE_FROM_CLASS (object_class),
 607                                            G_SIGNAL_RUN_LAST |
 608                                            G_SIGNAL_ACTION,
 609                                            G_STRUCT_OFFSET (GtkXPanedClass,
 610                                                             accept_position),
 611                                            NULL, NULL,
 612                                            psppire_marshal_BOOLEAN__VOID,
 613                                            G_TYPE_BOOLEAN, 0);
 614
 615   signals[CANCEL_POSITION] = g_signal_new ("cancel-position",
 616                                            G_TYPE_FROM_CLASS (object_class),
 617                                            G_SIGNAL_RUN_LAST |
 618                                            G_SIGNAL_ACTION,
 619                                            G_STRUCT_OFFSET (GtkXPanedClass,
 620                                                             cancel_position),
 621                                            NULL, NULL,
 622                                            psppire_marshal_BOOLEAN__VOID,
 623                                            G_TYPE_BOOLEAN, 0);
 624
 625   binding_set = gtk_binding_set_by_class (class);
 626
 627   /* F6 and friends */
 628   gtk_binding_entry_add_signal (binding_set,
 629                                 GDK_F6, 0,
 630                                 "cycle-child-focus", 1,
 631                                 G_TYPE_BOOLEAN, FALSE);
 632
 633   gtk_binding_entry_add_signal (binding_set,
 634                                 GDK_F6, GDK_SHIFT_MASK,
 635                                 "cycle-child-focus", 1, G_TYPE_BOOLEAN, TRUE);
 636
 637   /* F8 and friends */
 638   gtk_binding_entry_add_signal (binding_set,
 639                                 GDK_F8, 0,
 640                                 "cycle-handle-focus", 1,
 641                                 G_TYPE_BOOLEAN, FALSE);
 642
 643   gtk_binding_entry_add_signal (binding_set,
 644                                 GDK_F8, GDK_SHIFT_MASK,
 645                                 "cycle-handle-focus", 1,
 646                                 G_TYPE_BOOLEAN, TRUE);
 647
 648   add_tab_bindings (binding_set, 0);
 649   add_tab_bindings (binding_set, GDK_CONTROL_MASK);
 650   add_tab_bindings (binding_set, GDK_SHIFT_MASK);
 651   add_tab_bindings (binding_set, GDK_CONTROL_MASK | GDK_SHIFT_MASK);
 652
 653   /* accept and cancel positions */
 654   gtk_binding_entry_add_signal (binding_set,
 655                                 GDK_Escape, 0, "cancel-position", 0);
 656
 657   gtk_binding_entry_add_signal (binding_set,
 658                                 GDK_Return, 0, "accept-position", 0);
 659
 660   gtk_binding_entry_add_signal (binding_set,
 661                                 GDK_KP_Enter, 0, "accept-position", 0);
 662
 663   gtk_binding_entry_add_signal (binding_set,
 664                                 GDK_space, 0, "accept-position", 0);
 665
 666   gtk_binding_entry_add_signal (binding_set,
 667                                 GDK_KP_Space, 0, "accept-position", 0);
 668
 669   /* move handle */
 670   add_move_binding (binding_set, GDK_Left, 0, GTK_SCROLL_STEP_LEFT);
 671   add_move_binding (binding_set, GDK_KP_Left, 0, GTK_SCROLL_STEP_LEFT);
 672   add_move_binding (binding_set, GDK_Left, GDK_CONTROL_MASK,
 673                     GTK_SCROLL_PAGE_LEFT);
 674   add_move_binding (binding_set, GDK_KP_Left, GDK_CONTROL_MASK,
 675                     GTK_SCROLL_PAGE_LEFT);
 676
 677   add_move_binding (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_RIGHT);
 678   add_move_binding (binding_set, GDK_Right, GDK_CONTROL_MASK,
 679                     GTK_SCROLL_PAGE_RIGHT);
 680   add_move_binding (binding_set, GDK_KP_Right, 0, GTK_SCROLL_STEP_RIGHT);
 681   add_move_binding (binding_set, GDK_KP_Right, GDK_CONTROL_MASK,
 682                     GTK_SCROLL_PAGE_RIGHT);
 683
 684   add_move_binding (binding_set, GDK_Up, 0, GTK_SCROLL_STEP_UP);
 685   add_move_binding (binding_set, GDK_Up, GDK_CONTROL_MASK,
 686                     GTK_SCROLL_PAGE_UP);
 687   add_move_binding (binding_set, GDK_KP_Up, 0, GTK_SCROLL_STEP_UP);
 688   add_move_binding (binding_set, GDK_KP_Up, GDK_CONTROL_MASK,
 689                     GTK_SCROLL_PAGE_UP);
 690   add_move_binding (binding_set, GDK_Page_Up, 0, GTK_SCROLL_PAGE_UP);
 691   add_move_binding (binding_set, GDK_KP_Page_Up, 0, GTK_SCROLL_PAGE_UP);
 692
 693   add_move_binding (binding_set, GDK_Down, 0, GTK_SCROLL_STEP_DOWN);
 694   add_move_binding (binding_set, GDK_Down, GDK_CONTROL_MASK,
 695                     GTK_SCROLL_PAGE_DOWN);
 696   add_move_binding (binding_set, GDK_KP_Down, 0, GTK_SCROLL_STEP_DOWN);
 697   add_move_binding (binding_set, GDK_KP_Down, GDK_CONTROL_MASK,
 698                     GTK_SCROLL_PAGE_DOWN);
 699   add_move_binding (binding_set, GDK_Page_Down, 0, GTK_SCROLL_PAGE_RIGHT);
 700   add_move_binding (binding_set, GDK_KP_Page_Down, 0, GTK_SCROLL_PAGE_RIGHT);
 701
 702   add_move_binding (binding_set, GDK_Home, 0, GTK_SCROLL_START);
 703   add_move_binding (binding_set, GDK_KP_Home, 0, GTK_SCROLL_START);
 704   add_move_binding (binding_set, GDK_End, 0, GTK_SCROLL_END);
 705   add_move_binding (binding_set, GDK_KP_End, 0, GTK_SCROLL_END);
 706 }
 707
 708 static GType
 709 gtk_xpaned_child_type (GtkContainer * container)
 710 {
 711   if (!GTK_XPANED (container)->top_left_child ||
 712       !GTK_XPANED (container)->top_right_child ||
 713       !GTK_XPANED (container)->bottom_left_child ||
 714       !GTK_XPANED (container)->bottom_right_child)
 715     return GTK_TYPE_WIDGET;
 716   else
 717     return G_TYPE_NONE;
 718 }
 719
 720 static void
 721 gtk_xpaned_init (GtkXPaned * xpaned)
 722 {
 723   gtk_widget_set_can_focus (GTK_WIDGET (xpaned), TRUE);
 724   gtk_widget_set_has_window (GTK_WIDGET (xpaned), FALSE);
 725
 726   xpaned->top_left_child = NULL;
 727   xpaned->top_right_child = NULL;
 728   xpaned->bottom_left_child = NULL;
 729   xpaned->bottom_right_child = NULL;
 730   xpaned->handle_east = NULL;
 731   xpaned->handle_west = NULL;
 732   xpaned->handle_north = NULL;
 733   xpaned->handle_south = NULL;
 734   xpaned->handle_middle = NULL;
 735   xpaned->cursor_type_east = GDK_SB_V_DOUBLE_ARROW;
 736   xpaned->cursor_type_west = GDK_SB_V_DOUBLE_ARROW;
 737   xpaned->cursor_type_north = GDK_SB_H_DOUBLE_ARROW;
 738   xpaned->cursor_type_south = GDK_SB_H_DOUBLE_ARROW;
 739   xpaned->cursor_type_middle = GDK_FLEUR;
 740
 741   xpaned->handle_pos_east.width = 5;
 742   xpaned->handle_pos_east.height = 5;
 743   xpaned->handle_pos_west.width = 5;
 744   xpaned->handle_pos_west.height = 5;
 745   xpaned->handle_pos_north.width = 5;
 746   xpaned->handle_pos_north.height = 5;
 747   xpaned->handle_pos_south.width = 5;
 748   xpaned->handle_pos_south.height = 5;
 749   xpaned->handle_pos_middle.width = 5;
 750   xpaned->handle_pos_middle.height = 5;
 751
 752   xpaned->position_set = FALSE;
 753   xpaned->last_allocation.width = -1;
 754   xpaned->last_allocation.height = -1;
 755   xpaned->in_drag_vert = FALSE;
 756   xpaned->in_drag_horiz = FALSE;
 757   xpaned->in_drag_vert_and_horiz = FALSE;
 758
 759   xpaned->maximized[GTK_XPANED_TOP_LEFT] = FALSE;
 760   xpaned->maximized[GTK_XPANED_TOP_RIGHT] = FALSE;
 761   xpaned->maximized[GTK_XPANED_BOTTOM_LEFT] = FALSE;
 762   xpaned->maximized[GTK_XPANED_BOTTOM_RIGHT] = FALSE;
 763
 764   xpaned->priv = g_new0 (GtkXPanedPrivate, 1);
 765   xpaned->last_top_left_child_focus = NULL;
 766   xpaned->last_top_right_child_focus = NULL;
 767   xpaned->last_bottom_left_child_focus = NULL;
 768   xpaned->last_bottom_right_child_focus = NULL;
 769   xpaned->in_recursion = FALSE;
 770   xpaned->handle_prelit = FALSE;
 771   xpaned->original_position.x = -1;
 772   xpaned->original_position.y = -1;
 773   xpaned->unmaximized_position.x = -1;
 774   xpaned->unmaximized_position.y = -1;
 775
 776   xpaned->handle_pos_east.x = -1;
 777   xpaned->handle_pos_east.y = -1;
 778   xpaned->handle_pos_west.x = -1;
 779   xpaned->handle_pos_west.y = -1;
 780   xpaned->handle_pos_north.x = -1;
 781   xpaned->handle_pos_north.y = -1;
 782   xpaned->handle_pos_south.x = -1;
 783   xpaned->handle_pos_south.y = -1;
 784   xpaned->handle_pos_middle.x = -1;
 785   xpaned->handle_pos_middle.y = -1;
 786
 787   xpaned->drag_pos.x = -1;
 788   xpaned->drag_pos.y = -1;
 789 }
 790
 791 void
 792 gtk_xpaned_compute_position (GtkXPaned * xpaned,
 793                              const GtkAllocation * allocation,
 794                              GtkRequisition * top_left_child_req,
 795                              GtkRequisition * top_right_child_req,
 796                              GtkRequisition * bottom_left_child_req,
 797                              GtkRequisition * bottom_right_child_req);
 798
 799
 800 static void
 801 gtk_xpaned_size_allocate (GtkWidget * widget, GtkAllocation * allocation)
 802 {
 803   GtkXPaned *xpaned = GTK_XPANED (widget);
 804   gint border_width = gtk_container_get_border_width (GTK_CONTAINER (xpaned));
 805   GtkAllocation top_left_child_allocation;
 806   GtkAllocation top_right_child_allocation;
 807   GtkAllocation bottom_left_child_allocation;
 808   GtkAllocation bottom_right_child_allocation;
 809   GtkRequisition top_left_child_requisition;
 810   GtkRequisition top_right_child_requisition;
 811   GtkRequisition bottom_left_child_requisition;
 812   GtkRequisition bottom_right_child_requisition;
 813   gint handle_size;
 814
 815   /* determine size of handle(s) */
 816   gtk_widget_style_get (widget, "handle-size", &handle_size, NULL);
 817
 818   gtk_widget_set_allocation (widget, allocation);
 819
 820   if (xpaned->top_left_child
 821       && gtk_widget_get_visible (xpaned->top_left_child)
 822       && xpaned->top_right_child
 823       && gtk_widget_get_visible (xpaned->top_right_child)
 824       && xpaned->bottom_left_child
 825       && gtk_widget_get_visible (xpaned->bottom_left_child)
 826       && xpaned->bottom_right_child
 827       && gtk_widget_get_visible (xpaned->bottom_right_child))
 828     {
 829       /* what sizes do the children want to be at least at */
 830       gtk_widget_get_preferred_size (xpaned->top_left_child,
 831                                      &top_left_child_requisition, NULL);
 832       gtk_widget_get_preferred_size (xpaned->top_right_child,
 833                                      &top_right_child_requisition, NULL);
 834       gtk_widget_get_preferred_size (xpaned->bottom_left_child,
 835                                      &bottom_left_child_requisition, NULL);
 836       gtk_widget_get_preferred_size (xpaned->bottom_right_child,
 837                                      &bottom_right_child_requisition, NULL);
 838
 839       /* determine the total requisition-sum of all requisitions of borders,
 840        * handles, children etc. */
 841       gtk_xpaned_compute_position (xpaned,
 842                                    allocation,
 843                                    &top_left_child_requisition,
 844                                    &top_right_child_requisition,
 845                                    &bottom_left_child_requisition,
 846                                    &bottom_right_child_requisition);
 847
 848       /* calculate the current positions and sizes of the handles */
 849       xpaned->handle_pos_east.x =
 850         allocation->x + border_width +
 851         xpaned->top_left_child_size.width + handle_size;
 852       xpaned->handle_pos_east.y =
 853         allocation->y + border_width +
 854         xpaned->top_left_child_size.height;
 855       xpaned->handle_pos_east.width =
 856         allocation->width - xpaned->top_left_child_size.width -
 857         2 * border_width - handle_size;
 858       xpaned->handle_pos_east.height = handle_size;
 859
 860       xpaned->handle_pos_west.x = allocation->x + border_width;
 861       xpaned->handle_pos_west.y = xpaned->handle_pos_east.y;
 862       xpaned->handle_pos_west.width =
 863         allocation->width - xpaned->handle_pos_east.width -
 864         2 * border_width - handle_size;
 865       xpaned->handle_pos_west.height = handle_size;
 866
 867       xpaned->handle_pos_north.x = xpaned->handle_pos_east.x - handle_size;
 868       xpaned->handle_pos_north.y = allocation->y + border_width;
 869       xpaned->handle_pos_north.width = handle_size;
 870       xpaned->handle_pos_north.height =
 871         xpaned->handle_pos_east.y - allocation->y - border_width;
 872
 873       xpaned->handle_pos_south.x = xpaned->handle_pos_north.x;
 874       xpaned->handle_pos_south.y = xpaned->handle_pos_east.y + handle_size;
 875       xpaned->handle_pos_south.width = handle_size;
 876       xpaned->handle_pos_south.height =
 877         allocation->height - xpaned->handle_pos_north.height -
 878         2 * border_width - handle_size;
 879
 880
 881 #define CENTRUM 20
 882       xpaned->handle_pos_middle.x = xpaned->handle_pos_north.x;
 883       xpaned->handle_pos_middle.y = xpaned->handle_pos_east.y;
 884       xpaned->handle_pos_middle.width = handle_size + CENTRUM;
 885       xpaned->handle_pos_middle.height = handle_size + CENTRUM;
 886
 887       /* set allocation for top-left child */
 888       top_left_child_allocation.x = allocation->x + border_width;
 889       top_left_child_allocation.y = allocation->y + border_width;
 890       top_left_child_allocation.width = xpaned->handle_pos_west.width;
 891       top_left_child_allocation.height = xpaned->handle_pos_north.height;
 892
 893       /* set allocation for top-right child */
 894       top_right_child_allocation.x =
 895         allocation->x + border_width + handle_size +
 896         top_left_child_allocation.width;
 897       top_right_child_allocation.y = allocation->y + border_width;
 898       top_right_child_allocation.width = xpaned->handle_pos_east.width;
 899       top_right_child_allocation.height = xpaned->handle_pos_north.height;
 900
 901       /* set allocation for bottom-left child */
 902       bottom_left_child_allocation.x = xpaned->handle_pos_west.x;
 903       bottom_left_child_allocation.y = xpaned->handle_pos_south.y;
 904       bottom_left_child_allocation.width = xpaned->handle_pos_west.width;
 905       bottom_left_child_allocation.height = xpaned->handle_pos_south.height;
 906
 907       /* set allocation for bottom-right child */
 908       bottom_right_child_allocation.x = top_right_child_allocation.x;
 909       bottom_right_child_allocation.y = bottom_left_child_allocation.y;
 910       bottom_right_child_allocation.width = xpaned->handle_pos_east.width;
 911       bottom_right_child_allocation.height = xpaned->handle_pos_south.height;
 912
 913       if (gtk_widget_get_realized (widget))
 914         {
 915           if (gtk_widget_get_mapped (widget))
 916             {
 917               gdk_window_show (xpaned->handle_east);
 918               gdk_window_show (xpaned->handle_west);
 919               gdk_window_show (xpaned->handle_north);
 920               gdk_window_show (xpaned->handle_south);
 921               gdk_window_show (xpaned->handle_middle);
 922             }
 923
 924           gdk_window_move_resize (xpaned->handle_east,
 925                                   xpaned->handle_pos_east.x,
 926                                   xpaned->handle_pos_east.y,
 927                                   xpaned->handle_pos_east.width,
 928                                   xpaned->handle_pos_east.height);
 929
 930           gdk_window_move_resize (xpaned->handle_west,
 931                                   xpaned->handle_pos_west.x,
 932                                   xpaned->handle_pos_west.y,
 933                                   xpaned->handle_pos_west.width,
 934                                   xpaned->handle_pos_west.height);
 935
 936           gdk_window_move_resize (xpaned->handle_north,
 937                                   xpaned->handle_pos_north.x,
 938                                   xpaned->handle_pos_north.y,
 939                                   xpaned->handle_pos_north.width,
 940                                   xpaned->handle_pos_north.height);
 941
 942           gdk_window_move_resize (xpaned->handle_south,
 943                                   xpaned->handle_pos_south.x,
 944                                   xpaned->handle_pos_south.y,
 945                                   xpaned->handle_pos_south.width,
 946                                   xpaned->handle_pos_south.height);
 947
 948           gdk_window_move_resize (xpaned->handle_middle,
 949                                   xpaned->handle_pos_middle.x,
 950                                   xpaned->handle_pos_middle.y,
 951                                   xpaned->handle_pos_middle.width,
 952                                   xpaned->handle_pos_middle.height);
 953         }
 954
 955       /* Now allocate the childen, making sure, when resizing not to
 956        * overlap the windows
 957        */
 958       if (gtk_widget_get_mapped (widget))
 959         {
 960           gtk_widget_size_allocate (xpaned->top_right_child,
 961                                     &top_right_child_allocation);
 962           gtk_widget_size_allocate (xpaned->top_left_child,
 963                                     &top_left_child_allocation);
 964           gtk_widget_size_allocate (xpaned->bottom_left_child,
 965                                     &bottom_left_child_allocation);
 966           gtk_widget_size_allocate (xpaned->bottom_right_child,
 967                                     &bottom_right_child_allocation);
 968         }
 969     }
 970 }
 971
 972 static void
 973 gtk_xpaned_set_property (GObject * object,
 974                          guint prop_id,
 975                          const GValue * value, GParamSpec * pspec)
 976 {
 977   GtkXPaned *xpaned = GTK_XPANED (object);
 978
 979   switch (prop_id)
 980     {
 981     case PROP_X_POSITION:
 982       gtk_xpaned_set_position_x (xpaned, g_value_get_int (value));
 983       break;
 984
 985     case PROP_Y_POSITION:
 986       gtk_xpaned_set_position_y (xpaned, g_value_get_int (value));
 987       break;
 988
 989     case PROP_POSITION_SET:
 990       xpaned->position_set = g_value_get_boolean (value);
 991       gtk_widget_queue_resize (GTK_WIDGET (xpaned));
 992       break;
 993
 994     default:
 995       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 996       break;
 997     }
 998 }
 999
1000 static void
1001 gtk_xpaned_get_property (GObject * object,
1002                          guint prop_id, GValue * value, GParamSpec * pspec)
1003 {
1004   GtkXPaned *xpaned = GTK_XPANED (object);
1005
1006   switch (prop_id)
1007     {
1008     case PROP_X_POSITION:
1009       g_value_set_int (value, xpaned->top_left_child_size.width);
1010       break;
1011
1012     case PROP_Y_POSITION:
1013       g_value_set_int (value, xpaned->top_left_child_size.height);
1014       break;
1015
1016     case PROP_POSITION_SET:
1017       g_value_set_boolean (value, xpaned->position_set);
1018       break;
1019
1020     case PROP_MIN_X_POSITION:
1021       g_value_set_int (value, xpaned->min_position.x);
1022       break;
1023
1024     case PROP_MIN_Y_POSITION:
1025       g_value_set_int (value, xpaned->min_position.y);
1026       break;
1027
1028     case PROP_MAX_X_POSITION:
1029       g_value_set_int (value, xpaned->max_position.x);
1030       break;
1031
1032     case PROP_MAX_Y_POSITION:
1033       g_value_set_int (value, xpaned->max_position.y);
1034       break;
1035
1036     default:
1037       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1038       break;
1039     }
1040 }
1041
1042 static void
1043 gtk_xpaned_set_child_property (GtkContainer * container,
1044                                GtkWidget * child,
1045                                guint property_id,
1046                                const GValue * value, GParamSpec * pspec)
1047 {
1048   GtkXPaned *xpaned = GTK_XPANED (container);
1049   gboolean old_value = FALSE;
1050   gboolean new_value = FALSE;
1051
1052   g_assert (child == xpaned->top_left_child ||
1053             child == xpaned->top_right_child ||
1054             child == xpaned->bottom_left_child ||
1055             child == xpaned->bottom_right_child);
1056
1057   new_value = g_value_get_boolean (value);
1058
1059   switch (property_id)
1060     {
1061     case CHILD_PROP_RESIZE:
1062       if (child == xpaned->top_left_child)
1063         {
1064           old_value = xpaned->top_left_child_resize;
1065           xpaned->top_left_child_resize = new_value;
1066         }
1067       else if (child == xpaned->top_right_child)
1068         {
1069           old_value = xpaned->top_right_child_resize;
1070           xpaned->top_right_child_resize = new_value;
1071         }
1072       else if (child == xpaned->bottom_left_child)
1073         {
1074           old_value = xpaned->bottom_left_child_resize;
1075           xpaned->bottom_left_child_resize = new_value;
1076         }
1077       else if (child == xpaned->bottom_right_child)
1078         {
1079           old_value = xpaned->bottom_right_child_resize;
1080           xpaned->bottom_right_child_resize = new_value;
1081         }
1082       break;
1083
1084     case CHILD_PROP_SHRINK:
1085       if (child == xpaned->top_left_child)
1086         {
1087           old_value = xpaned->top_left_child_shrink;
1088           xpaned->top_left_child_shrink = new_value;
1089         }
1090       else if (child == xpaned->top_right_child)
1091         {
1092           old_value = xpaned->top_right_child_shrink;
1093           xpaned->top_right_child_shrink = new_value;
1094         }
1095       else if (child == xpaned->bottom_left_child)
1096         {
1097           old_value = xpaned->bottom_left_child_shrink;
1098           xpaned->bottom_left_child_shrink = new_value;
1099         }
1100       else if (child == xpaned->bottom_right_child)
1101         {
1102           old_value = xpaned->bottom_right_child_shrink;
1103           xpaned->bottom_right_child_shrink = new_value;
1104         }
1105       break;
1106
1107     default:
1108       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container,
1109                                                     property_id, pspec);
1110       old_value = -1;           /* quiet gcc */
1111       break;
1112     }
1113
1114   if (old_value != new_value)
1115     gtk_widget_queue_resize (GTK_WIDGET (container));
1116 }
1117
1118 static void
1119 gtk_xpaned_get_child_property (GtkContainer * container,
1120                                GtkWidget * child,
1121                                guint property_id,
1122                                GValue * value, GParamSpec * pspec)
1123 {
1124   GtkXPaned *xpaned = GTK_XPANED (container);
1125
1126   g_assert (child == xpaned->top_left_child ||
1127             child == xpaned->top_right_child ||
1128             child == xpaned->bottom_left_child ||
1129             child == xpaned->bottom_right_child);
1130
1131   switch (property_id)
1132     {
1133     case CHILD_PROP_RESIZE:
1134       if (child == xpaned->top_left_child)
1135         g_value_set_boolean (value, xpaned->top_left_child_resize);
1136       else if (child == xpaned->top_right_child)
1137         g_value_set_boolean (value, xpaned->top_right_child_resize);
1138       else if (child == xpaned->bottom_left_child)
1139         g_value_set_boolean (value, xpaned->bottom_left_child_resize);
1140       else if (child == xpaned->bottom_right_child)
1141         g_value_set_boolean (value, xpaned->bottom_right_child_resize);
1142       break;
1143
1144     case CHILD_PROP_SHRINK:
1145       if (child == xpaned->top_left_child)
1146         g_value_set_boolean (value, xpaned->top_left_child_shrink);
1147       else if (child == xpaned->top_right_child)
1148         g_value_set_boolean (value, xpaned->top_right_child_shrink);
1149       else if (child == xpaned->bottom_left_child)
1150         g_value_set_boolean (value, xpaned->bottom_left_child_shrink);
1151       else if (child == xpaned->bottom_right_child)
1152         g_value_set_boolean (value, xpaned->bottom_right_child_shrink);
1153       break;
1154
1155     default:
1156       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container,
1157                                                     property_id, pspec);
1158       break;
1159     }
1160 }
1161
1162 static void
1163 gtk_xpaned_finalize (GObject * object)
1164 {
1165   GtkXPaned *xpaned = GTK_XPANED (object);
1166
1167   gtk_xpaned_set_saved_focus (xpaned, NULL);
1168   gtk_xpaned_set_first_xpaned (xpaned, NULL);
1169
1170   g_free (xpaned->priv);
1171
1172   G_OBJECT_CLASS (parent_class)->finalize (object);
1173 }
1174
1175 static void
1176 gtk_xpaned_realize (GtkWidget * widget)
1177 {
1178   GtkXPaned *xpaned;
1179   GdkWindowAttr attributes_east;
1180   GdkWindowAttr attributes_west;
1181   GdkWindowAttr attributes_north;
1182   GdkWindowAttr attributes_south;
1183   GdkWindowAttr attributes_middle;
1184   gint attributes_mask_east;
1185   gint attributes_mask_west;
1186   gint attributes_mask_north;
1187   gint attributes_mask_south;
1188   gint attributes_mask_middle;
1189
1190   gtk_widget_set_realized (widget, TRUE);
1191   xpaned = GTK_XPANED (widget);
1192
1193   gtk_widget_set_window (widget, gtk_widget_get_parent_window (widget));
1194   //  g_object_ref (widget->window);
1195
1196   attributes_east.window_type = GDK_WINDOW_CHILD;
1197   attributes_west.window_type = GDK_WINDOW_CHILD;
1198   attributes_north.window_type = GDK_WINDOW_CHILD;
1199   attributes_south.window_type = GDK_WINDOW_CHILD;
1200   attributes_middle.window_type = GDK_WINDOW_CHILD;
1201
1202   attributes_east.wclass = GDK_INPUT_ONLY;
1203   attributes_west.wclass = GDK_INPUT_ONLY;
1204   attributes_north.wclass = GDK_INPUT_ONLY;
1205   attributes_south.wclass = GDK_INPUT_ONLY;
1206   attributes_middle.wclass = GDK_INPUT_ONLY;
1207
1208   attributes_east.x = xpaned->handle_pos_east.x;
1209   attributes_east.y = xpaned->handle_pos_east.y;
1210   attributes_east.width = xpaned->handle_pos_east.width;
1211   attributes_east.height = xpaned->handle_pos_east.height;
1212
1213   attributes_west.x = xpaned->handle_pos_west.x;
1214   attributes_west.y = xpaned->handle_pos_west.y;
1215   attributes_west.width = xpaned->handle_pos_west.width;
1216   attributes_west.height = xpaned->handle_pos_west.height;
1217
1218   attributes_north.x = xpaned->handle_pos_north.x;
1219   attributes_north.y = xpaned->handle_pos_north.y;
1220   attributes_north.width = xpaned->handle_pos_north.width;
1221   attributes_north.height = xpaned->handle_pos_north.height;
1222
1223   attributes_south.x = xpaned->handle_pos_south.x;
1224   attributes_south.y = xpaned->handle_pos_south.y;
1225   attributes_south.width = xpaned->handle_pos_south.width;
1226   attributes_south.height = xpaned->handle_pos_south.height;
1227
1228   attributes_middle.x = xpaned->handle_pos_middle.x;
1229   attributes_middle.y = xpaned->handle_pos_middle.y;
1230   attributes_middle.width = xpaned->handle_pos_middle.width;
1231   attributes_middle.height = xpaned->handle_pos_middle.height;
1232
1233   attributes_east.cursor =
1234     gdk_cursor_new_for_display (gtk_widget_get_display (widget),
1235                                 xpaned->cursor_type_east);
1236   attributes_west.cursor =
1237     gdk_cursor_new_for_display (gtk_widget_get_display (widget),
1238                                 xpaned->cursor_type_west);
1239   attributes_north.cursor =
1240     gdk_cursor_new_for_display (gtk_widget_get_display (widget),
1241                                 xpaned->cursor_type_north);
1242   attributes_south.cursor =
1243     gdk_cursor_new_for_display (gtk_widget_get_display (widget),
1244                                 xpaned->cursor_type_south);
1245   attributes_middle.cursor =
1246     gdk_cursor_new_for_display (gtk_widget_get_display (widget),
1247                                 xpaned->cursor_type_middle);
1248
1249   attributes_east.event_mask = gtk_widget_get_events (widget);
1250   attributes_west.event_mask = gtk_widget_get_events (widget);
1251   attributes_north.event_mask = gtk_widget_get_events (widget);
1252   attributes_south.event_mask = gtk_widget_get_events (widget);
1253   attributes_middle.event_mask = gtk_widget_get_events (widget);
1254
1255   attributes_east.event_mask |= (GDK_BUTTON_PRESS_MASK |
1256                                  GDK_BUTTON_RELEASE_MASK |
1257                                  GDK_ENTER_NOTIFY_MASK |
1258                                  GDK_LEAVE_NOTIFY_MASK |
1259                                  GDK_POINTER_MOTION_MASK |
1260                                  GDK_POINTER_MOTION_HINT_MASK);
1261   attributes_west.event_mask |= (GDK_BUTTON_PRESS_MASK |
1262                                  GDK_BUTTON_RELEASE_MASK |
1263                                  GDK_ENTER_NOTIFY_MASK |
1264                                  GDK_LEAVE_NOTIFY_MASK |
1265                                  GDK_POINTER_MOTION_MASK |
1266                                  GDK_POINTER_MOTION_HINT_MASK);
1267   attributes_north.event_mask |= (GDK_BUTTON_PRESS_MASK |
1268                                   GDK_BUTTON_RELEASE_MASK |
1269                                   GDK_ENTER_NOTIFY_MASK |
1270                                   GDK_LEAVE_NOTIFY_MASK |
1271                                   GDK_POINTER_MOTION_MASK |
1272                                   GDK_POINTER_MOTION_HINT_MASK);
1273   attributes_south.event_mask |= (GDK_BUTTON_PRESS_MASK |
1274                                   GDK_BUTTON_RELEASE_MASK |
1275                                   GDK_ENTER_NOTIFY_MASK |
1276                                   GDK_LEAVE_NOTIFY_MASK |
1277                                   GDK_POINTER_MOTION_MASK |
1278                                   GDK_POINTER_MOTION_HINT_MASK);
1279   attributes_middle.event_mask |= (GDK_BUTTON_PRESS_MASK |
1280                                    GDK_BUTTON_RELEASE_MASK |
1281                                    GDK_ENTER_NOTIFY_MASK |
1282                                    GDK_LEAVE_NOTIFY_MASK |
1283                                    GDK_POINTER_MOTION_MASK |
1284                                    GDK_POINTER_MOTION_HINT_MASK);
1285
1286   attributes_mask_east = GDK_WA_X | GDK_WA_Y | GDK_WA_CURSOR;
1287   attributes_mask_west = GDK_WA_X | GDK_WA_Y | GDK_WA_CURSOR;
1288   attributes_mask_north = GDK_WA_X | GDK_WA_Y | GDK_WA_CURSOR;
1289   attributes_mask_south = GDK_WA_X | GDK_WA_Y | GDK_WA_CURSOR;
1290   attributes_mask_middle = GDK_WA_X | GDK_WA_Y | GDK_WA_CURSOR;
1291
1292   xpaned->handle_east = gdk_window_new (gtk_widget_get_window (widget),
1293                                         &attributes_east,
1294                                         attributes_mask_east);
1295   xpaned->handle_west = gdk_window_new (gtk_widget_get_window (widget),
1296                                         &attributes_west,
1297                                         attributes_mask_west);
1298   xpaned->handle_north = gdk_window_new (gtk_widget_get_window (widget),
1299                                          &attributes_north,
1300                                          attributes_mask_north);
1301   xpaned->handle_south = gdk_window_new (gtk_widget_get_window (widget),
1302                                          &attributes_south,
1303                                          attributes_mask_south);
1304   xpaned->handle_middle = gdk_window_new (gtk_widget_get_window (widget),
1305                                           &attributes_middle,
1306                                           attributes_mask_middle);
1307
1308   gdk_window_set_user_data (xpaned->handle_east, xpaned);
1309   gdk_window_set_user_data (xpaned->handle_west, xpaned);
1310   gdk_window_set_user_data (xpaned->handle_north, xpaned);
1311   gdk_window_set_user_data (xpaned->handle_south, xpaned);
1312   gdk_window_set_user_data (xpaned->handle_middle, xpaned);
1313
1314   g_object_unref (attributes_east.cursor);
1315   g_object_unref (attributes_west.cursor);
1316   g_object_unref (attributes_north.cursor);
1317   g_object_unref (attributes_south.cursor);
1318   g_object_unref (attributes_middle.cursor);
1319
1320   if (xpaned->top_left_child
1321       && gtk_widget_get_visible (xpaned->top_left_child)
1322       && xpaned->top_right_child
1323       && gtk_widget_get_visible (xpaned->top_right_child)
1324       && xpaned->bottom_left_child
1325       && gtk_widget_get_visible (xpaned->bottom_left_child)
1326       && xpaned->bottom_right_child
1327       && gtk_widget_get_visible (xpaned->bottom_right_child))
1328     {
1329       gdk_window_show (xpaned->handle_east);
1330       gdk_window_show (xpaned->handle_west);
1331       gdk_window_show (xpaned->handle_north);
1332       gdk_window_show (xpaned->handle_south);
1333       gdk_window_show (xpaned->handle_middle);
1334     }
1335 }
1336
1337 static void
1338 gtk_xpaned_unrealize (GtkWidget * widget)
1339 {
1340   GtkXPaned *xpaned = GTK_XPANED (widget);
1341
1342   if (xpaned->handle_east)
1343     {
1344       gdk_window_set_user_data (xpaned->handle_east, NULL);
1345       gdk_window_destroy (xpaned->handle_east);
1346       xpaned->handle_east = NULL;
1347     }
1348
1349   if (xpaned->handle_west)
1350     {
1351       gdk_window_set_user_data (xpaned->handle_west, NULL);
1352       gdk_window_destroy (xpaned->handle_west);
1353       xpaned->handle_west = NULL;
1354     }
1355
1356   if (xpaned->handle_north)
1357     {
1358       gdk_window_set_user_data (xpaned->handle_north, NULL);
1359       gdk_window_destroy (xpaned->handle_north);
1360       xpaned->handle_north = NULL;
1361     }
1362
1363   if (xpaned->handle_south)
1364     {
1365       gdk_window_set_user_data (xpaned->handle_south, NULL);
1366       gdk_window_destroy (xpaned->handle_south);
1367       xpaned->handle_south = NULL;
1368     }
1369
1370   if (xpaned->handle_middle)
1371     {
1372       gdk_window_set_user_data (xpaned->handle_middle, NULL);
1373       gdk_window_destroy (xpaned->handle_middle);
1374       xpaned->handle_middle = NULL;
1375     }
1376
1377   gtk_xpaned_set_last_top_left_child_focus (xpaned, NULL);
1378   gtk_xpaned_set_last_top_right_child_focus (xpaned, NULL);
1379   gtk_xpaned_set_last_bottom_left_child_focus (xpaned, NULL);
1380   gtk_xpaned_set_last_bottom_right_child_focus (xpaned, NULL);
1381   gtk_xpaned_set_saved_focus (xpaned, NULL);
1382   gtk_xpaned_set_first_xpaned (xpaned, NULL);
1383
1384   if (GTK_WIDGET_CLASS (parent_class)->unrealize)
1385     (*GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
1386 }
1387
1388 static void
1389 gtk_xpaned_map (GtkWidget * widget)
1390 {
1391   GtkXPaned *xpaned = GTK_XPANED (widget);
1392
1393   gdk_window_show (xpaned->handle_east);
1394   gdk_window_show (xpaned->handle_west);
1395   gdk_window_show (xpaned->handle_north);
1396   gdk_window_show (xpaned->handle_south);
1397   gdk_window_show (xpaned->handle_middle);
1398
1399   GTK_WIDGET_CLASS (parent_class)->map (widget);
1400 }
1401
1402 static void
1403 gtk_xpaned_unmap (GtkWidget * widget)
1404 {
1405   GtkXPaned *xpaned = GTK_XPANED (widget);
1406
1407   gdk_window_hide (xpaned->handle_east);
1408   gdk_window_hide (xpaned->handle_west);
1409   gdk_window_hide (xpaned->handle_north);
1410   gdk_window_hide (xpaned->handle_south);
1411   gdk_window_hide (xpaned->handle_middle);
1412
1413   GTK_WIDGET_CLASS (parent_class)->unmap (widget);
1414 }
1415
1416 static gboolean
1417 gtk_xpaned_draw (GtkWidget * widget, cairo_t *cr)
1418 {
1419   GtkXPaned *xpaned = GTK_XPANED (widget);
1420   gint handle_size;
1421
1422   /* determine size of handle(s) */
1423   gtk_widget_style_get (widget, "handle-size", &handle_size, NULL);
1424
1425   /* I want the handle-"thickness" to be at least 3 */
1426   g_assert (handle_size >= 3);
1427
1428   if (gtk_widget_get_visible (widget) && gtk_widget_get_mapped (widget) &&
1429       xpaned->top_left_child
1430       && gtk_widget_get_visible (xpaned->top_left_child)
1431       && xpaned->top_right_child
1432       && gtk_widget_get_visible (xpaned->top_right_child)
1433       && xpaned->bottom_left_child
1434       && gtk_widget_get_visible (xpaned->bottom_left_child)
1435       && xpaned->bottom_right_child
1436       && gtk_widget_get_visible (xpaned->bottom_right_child))
1437     {
1438       GtkStyleContext *context;
1439
1440       context = gtk_widget_get_style_context (widget);
1441       gtk_render_handle (context, cr,
1442                          xpaned->handle_pos_east.x - handle_size - 256 / 2,
1443                          xpaned->handle_pos_west.y + 1,
1444                          256 + handle_size, handle_size - 2);
1445
1446       gtk_render_handle (context, cr,
1447                          xpaned->handle_pos_north.x + 1,
1448                          xpaned->handle_pos_south.y - handle_size - 256 / 2,
1449                          handle_size - 2, 256 + handle_size);
1450     }
1451
1452   /* Chain up to draw children */
1453   GTK_WIDGET_CLASS (parent_class)->draw (widget, cr);
1454
1455   return FALSE;
1456 }
1457
1458 static gboolean
1459 is_rtl (GtkXPaned * xpaned)
1460 {
1461   if (gtk_widget_get_direction (GTK_WIDGET (xpaned)) == GTK_TEXT_DIR_RTL)
1462     return TRUE;
1463
1464   return FALSE;
1465 }
1466
1467 static void
1468 update_drag (GtkXPaned * xpaned)
1469 {
1470   GdkPoint pos;
1471   GtkWidget *widget = GTK_WIDGET (xpaned);
1472   gint handle_size;
1473   GtkRequisition size;
1474   GtkAllocation allocation;
1475
1476   gtk_widget_get_allocation (widget, &allocation);
1477
1478   gdk_window_get_device_position (gtk_widget_get_window (widget),
1479                                   gdk_device_manager_get_client_pointer (
1480                                     gdk_display_get_device_manager (
1481                                       gtk_widget_get_display (widget))),
1482                                   &pos.x, &pos.y, NULL);
1483   if (!gtk_widget_get_has_window (widget))
1484     {
1485       pos.x -= allocation.x;
1486       pos.y -= allocation.y;
1487     }
1488
1489   if (xpaned->in_drag_vert)
1490     {
1491       pos.y -= xpaned->drag_pos.y;
1492
1493       if (is_rtl (xpaned))
1494         {
1495           gtk_widget_style_get (widget, "handle-size", &handle_size, NULL);
1496
1497           size.height = allocation.height - pos.y - handle_size;
1498         }
1499       else
1500         {
1501           size.height = pos.y;
1502         }
1503
1504       size.height -= gtk_container_get_border_width (GTK_CONTAINER (xpaned));
1505
1506       size.height =
1507         CLAMP (size.height, xpaned->min_position.y, xpaned->max_position.y);
1508
1509       if (size.height != xpaned->top_left_child_size.height)
1510         gtk_xpaned_set_position_y (xpaned, size.height);
1511     }
1512
1513   if (xpaned->in_drag_horiz)
1514     {
1515       pos.x -= xpaned->drag_pos.x;
1516
1517       if (is_rtl (xpaned))
1518         {
1519           gtk_widget_style_get (widget, "handle-size", &handle_size, NULL);
1520
1521           size.width = allocation.width - pos.x - handle_size;
1522         }
1523       else
1524         {
1525           size.width = pos.x;
1526         }
1527
1528       size.width -= gtk_container_get_border_width (GTK_CONTAINER (xpaned));
1529
1530       size.width =
1531         CLAMP (size.width, xpaned->min_position.x, xpaned->max_position.x);
1532
1533       if (size.width != xpaned->top_left_child_size.width)
1534         gtk_xpaned_set_position_x (xpaned, size.width);
1535     }
1536
1537   if (xpaned->in_drag_vert_and_horiz)
1538     {
1539       pos.x -= xpaned->drag_pos.x;
1540       pos.y -= xpaned->drag_pos.y;
1541
1542       if (is_rtl (xpaned))
1543         {
1544           gtk_widget_style_get (widget, "handle-size", &handle_size, NULL);
1545
1546           size.width = allocation.width - pos.x - handle_size;
1547           size.height = allocation.height - pos.y - handle_size;
1548         }
1549       else
1550         {
1551           size.width = pos.x;
1552           size.height = pos.y;
1553         }
1554
1555       size.width -= gtk_container_get_border_width (GTK_CONTAINER (xpaned));
1556       size.height -= gtk_container_get_border_width (GTK_CONTAINER (xpaned));
1557
1558       size.width =
1559         CLAMP (size.width, xpaned->min_position.x, xpaned->max_position.x);
1560       size.height =
1561         CLAMP (size.height, xpaned->min_position.y, xpaned->max_position.y);
1562
1563       if (size.width != xpaned->top_left_child_size.width)
1564         gtk_xpaned_set_position_x (xpaned, size.width);
1565
1566       if (size.height != xpaned->top_left_child_size.height)
1567         gtk_xpaned_set_position_y (xpaned, size.height);
1568     }
1569 }
1570
1571 static gboolean
1572 gtk_xpaned_enter (GtkWidget * widget, GdkEventCrossing * event)
1573 {
1574   GtkXPaned *xpaned = GTK_XPANED (widget);
1575
1576   if (xpaned->in_drag_vert ||
1577       xpaned->in_drag_horiz || xpaned->in_drag_vert_and_horiz)
1578     update_drag (xpaned);
1579   else
1580     {
1581       xpaned->handle_prelit = TRUE;
1582
1583       gtk_widget_queue_draw_area (widget,
1584                                   xpaned->handle_pos_east.x,
1585                                   xpaned->handle_pos_east.y,
1586                                   xpaned->handle_pos_east.width,
1587                                   xpaned->handle_pos_east.height);
1588
1589       gtk_widget_queue_draw_area (widget,
1590                                   xpaned->handle_pos_west.x,
1591                                   xpaned->handle_pos_west.y,
1592                                   xpaned->handle_pos_west.width,
1593                                   xpaned->handle_pos_west.height);
1594
1595       gtk_widget_queue_draw_area (widget,
1596                                   xpaned->handle_pos_north.x,
1597                                   xpaned->handle_pos_north.y,
1598                                   xpaned->handle_pos_north.width,
1599                                   xpaned->handle_pos_north.height);
1600
1601       gtk_widget_queue_draw_area (widget,
1602                                   xpaned->handle_pos_south.x,
1603                                   xpaned->handle_pos_south.y,
1604                                   xpaned->handle_pos_south.width,
1605                                   xpaned->handle_pos_south.height);
1606
1607       gtk_widget_queue_draw_area (widget,
1608                                   xpaned->handle_pos_middle.x,
1609                                   xpaned->handle_pos_middle.y,
1610                                   xpaned->handle_pos_middle.width,
1611                                   xpaned->handle_pos_middle.height);
1612     }
1613
1614   return TRUE;
1615 }
1616
1617 static gboolean
1618 gtk_xpaned_leave (GtkWidget * widget, GdkEventCrossing * event)
1619 {
1620   GtkXPaned *xpaned = GTK_XPANED (widget);
1621
1622   if (xpaned->in_drag_vert ||
1623       xpaned->in_drag_horiz || xpaned->in_drag_vert_and_horiz)
1624     update_drag (xpaned);
1625   else
1626     {
1627       xpaned->handle_prelit = FALSE;
1628
1629       gtk_widget_queue_draw_area (widget,
1630                                   xpaned->handle_pos_east.x,
1631                                   xpaned->handle_pos_east.y,
1632                                   xpaned->handle_pos_east.width,
1633                                   xpaned->handle_pos_east.height);
1634
1635       gtk_widget_queue_draw_area (widget,
1636                                   xpaned->handle_pos_west.x,
1637                                   xpaned->handle_pos_west.y,
1638                                   xpaned->handle_pos_west.width,
1639                                   xpaned->handle_pos_west.height);
1640
1641       gtk_widget_queue_draw_area (widget,
1642                                   xpaned->handle_pos_north.x,
1643                                   xpaned->handle_pos_north.y,
1644                                   xpaned->handle_pos_north.width,
1645                                   xpaned->handle_pos_north.height);
1646
1647       gtk_widget_queue_draw_area (widget,
1648                                   xpaned->handle_pos_south.x,
1649                                   xpaned->handle_pos_south.y,
1650                                   xpaned->handle_pos_south.width,
1651                                   xpaned->handle_pos_south.height);
1652
1653       gtk_widget_queue_draw_area (widget,
1654                                   xpaned->handle_pos_middle.x,
1655                                   xpaned->handle_pos_middle.y,
1656                                   xpaned->handle_pos_middle.width,
1657                                   xpaned->handle_pos_middle.height);
1658     }
1659
1660   return TRUE;
1661 }
1662
1663 static gboolean
1664 gtk_xpaned_focus (GtkWidget * widget, GtkDirectionType direction)
1665 {
1666   gboolean retval;
1667
1668   /* This is a hack, but how can this be done without
1669    * excessive cut-and-paste from gtkcontainer.c?
1670    */
1671
1672   gtk_widget_set_can_focus (GTK_WIDGET (widget), FALSE);
1673   retval = (*GTK_WIDGET_CLASS (parent_class)->focus) (widget, direction);
1674   gtk_widget_set_can_focus (GTK_WIDGET (widget), TRUE);
1675
1676   return retval;
1677 }
1678
1679 static gboolean
1680 gtk_xpaned_button_press (GtkWidget * widget, GdkEventButton * event)
1681 {
1682   GtkXPaned *xpaned = GTK_XPANED (widget);
1683
1684   /* if any child is currently maximized, jump right back */
1685   if (xpaned->maximized[GTK_XPANED_TOP_LEFT] ||
1686       xpaned->maximized[GTK_XPANED_TOP_RIGHT] ||
1687       xpaned->maximized[GTK_XPANED_BOTTOM_LEFT] ||
1688       xpaned->maximized[GTK_XPANED_BOTTOM_RIGHT])
1689     return FALSE;
1690
1691   /* if user is dragging the handles around */
1692   if (!xpaned->in_drag_vert_and_horiz &&
1693       event->window != xpaned->handle_east &&
1694       event->window != xpaned->handle_west &&
1695       event->window != xpaned->handle_north &&
1696       event->window != xpaned->handle_south &&
1697       event->window == xpaned->handle_middle && event->button == 1)
1698     {
1699       xpaned->in_drag_vert_and_horiz = TRUE;
1700
1701       /* We need a server grab here, not gtk_grab_add(), since
1702        * we don't want to pass events on to the widget's children */
1703       if (gdk_pointer_grab (xpaned->handle_middle,
1704                             FALSE,
1705                             GDK_POINTER_MOTION_HINT_MASK
1706                             | GDK_BUTTON1_MOTION_MASK
1707                             | GDK_BUTTON_RELEASE_MASK
1708                             | GDK_ENTER_NOTIFY_MASK
1709                             | GDK_LEAVE_NOTIFY_MASK,
1710                             NULL, NULL, event->time) == GDK_GRAB_SUCCESS)
1711         {
1712         }
1713
1714       xpaned->drag_pos.x = event->x;
1715       xpaned->drag_pos.y = event->y;
1716
1717       return TRUE;
1718     }
1719   else if (!xpaned->in_drag_vert &&
1720            event->window == xpaned->handle_east &&
1721            event->window != xpaned->handle_west &&
1722            event->window != xpaned->handle_north &&
1723            event->window != xpaned->handle_south &&
1724            event->window != xpaned->handle_middle && event->button == 1)
1725     {
1726       xpaned->in_drag_vert = TRUE;
1727
1728       /* We need a server grab here, not gtk_grab_add(), since
1729        * we don't want to pass events on to the widget's children */
1730       if (gdk_pointer_grab (xpaned->handle_east,
1731                             FALSE,
1732                             GDK_POINTER_MOTION_HINT_MASK
1733                             | GDK_BUTTON1_MOTION_MASK
1734                             | GDK_BUTTON_RELEASE_MASK
1735                             | GDK_ENTER_NOTIFY_MASK
1736                             | GDK_LEAVE_NOTIFY_MASK,
1737                             NULL, NULL, event->time) == GDK_GRAB_SUCCESS)
1738         {
1739         }
1740
1741       xpaned->drag_pos.y = event->y;
1742
1743       return TRUE;
1744     }
1745   else if (!xpaned->in_drag_vert &&
1746            event->window != xpaned->handle_east &&
1747            event->window == xpaned->handle_west &&
1748            event->window != xpaned->handle_north &&
1749            event->window != xpaned->handle_south &&
1750            event->window != xpaned->handle_middle && event->button == 1)
1751     {
1752       xpaned->in_drag_vert = TRUE;
1753
1754       /* We need a server grab here, not gtk_grab_add(), since
1755        * we don't want to pass events on to the widget's children */
1756       if (gdk_pointer_grab (xpaned->handle_west,
1757                             FALSE,
1758                             GDK_POINTER_MOTION_HINT_MASK
1759                             | GDK_BUTTON1_MOTION_MASK
1760                             | GDK_BUTTON_RELEASE_MASK
1761                             | GDK_ENTER_NOTIFY_MASK
1762                             | GDK_LEAVE_NOTIFY_MASK,
1763                             NULL, NULL, event->time) == GDK_GRAB_SUCCESS)
1764         {
1765         }
1766
1767       xpaned->drag_pos.y = event->y;
1768
1769       return TRUE;
1770     }
1771   else if (!xpaned->in_drag_horiz &&
1772            event->window != xpaned->handle_east &&
1773            event->window != xpaned->handle_west &&
1774            event->window == xpaned->handle_north &&
1775            event->window != xpaned->handle_south &&
1776            event->window != xpaned->handle_middle && event->button == 1)
1777     {
1778       xpaned->in_drag_horiz = TRUE;
1779
1780       /* We need a server grab here, not gtk_grab_add(), since
1781        * we don't want to pass events on to the widget's children */
1782       if (gdk_pointer_grab (xpaned->handle_north,
1783                             FALSE,
1784                             GDK_POINTER_MOTION_HINT_MASK
1785                             | GDK_BUTTON1_MOTION_MASK
1786                             | GDK_BUTTON_RELEASE_MASK
1787                             | GDK_ENTER_NOTIFY_MASK
1788                             | GDK_LEAVE_NOTIFY_MASK,
1789                             NULL, NULL, event->time) == GDK_GRAB_SUCCESS)
1790         {
1791         }
1792
1793       xpaned->drag_pos.x = event->x;
1794
1795       return TRUE;
1796     }
1797   else if (!xpaned->in_drag_horiz &&
1798            event->window != xpaned->handle_east &&
1799            event->window != xpaned->handle_west &&
1800            event->window != xpaned->handle_north &&
1801            event->window == xpaned->handle_south &&
1802            event->window != xpaned->handle_middle && event->button == 1)
1803     {
1804       xpaned->in_drag_horiz = TRUE;
1805
1806       /* We need a server grab here, not gtk_grab_add(), since
1807        * we don't want to pass events on to the widget's children */
1808       if (gdk_pointer_grab (xpaned->handle_south,
1809                             FALSE,
1810                             GDK_POINTER_MOTION_HINT_MASK
1811                             | GDK_BUTTON1_MOTION_MASK
1812                             | GDK_BUTTON_RELEASE_MASK
1813                             | GDK_ENTER_NOTIFY_MASK
1814                             | GDK_LEAVE_NOTIFY_MASK,
1815                             NULL, NULL, event->time) == GDK_GRAB_SUCCESS)
1816         {
1817         }
1818
1819       xpaned->drag_pos.x = event->x;
1820
1821       return TRUE;
1822     }
1823   return FALSE;
1824 }
1825
1826 static gboolean
1827 gtk_xpaned_button_release (GtkWidget * widget, GdkEventButton * event)
1828 {
1829   GtkXPaned *xpaned = GTK_XPANED (widget);
1830
1831   if (xpaned->in_drag_vert && (event->button == 1))
1832     {
1833       xpaned->in_drag_vert = FALSE;
1834       xpaned->drag_pos.y = -1;
1835       xpaned->position_set = TRUE;
1836       gdk_display_pointer_ungrab (gtk_widget_get_display (widget),
1837                                   event->time);
1838       return TRUE;
1839     }
1840   else if (xpaned->in_drag_horiz && (event->button == 1))
1841     {
1842       xpaned->in_drag_horiz = FALSE;
1843       xpaned->drag_pos.x = -1;
1844       xpaned->position_set = TRUE;
1845       gdk_display_pointer_ungrab (gtk_widget_get_display (widget),
1846                                   event->time);
1847       return TRUE;
1848     }
1849   else if (xpaned->in_drag_vert_and_horiz && (event->button == 1))
1850     {
1851       xpaned->in_drag_vert_and_horiz = FALSE;
1852       xpaned->drag_pos.x = -1;
1853       xpaned->drag_pos.y = -1;
1854       xpaned->position_set = TRUE;
1855       gdk_display_pointer_ungrab (gtk_widget_get_display (widget),
1856                                   event->time);
1857       return TRUE;
1858     }
1859
1860   return FALSE;
1861 }
1862
1863 static gboolean
1864 gtk_xpaned_motion (GtkWidget * widget, GdkEventMotion * event)
1865 {
1866   GtkXPaned *xpaned = GTK_XPANED (widget);
1867
1868   if (xpaned->in_drag_vert ||
1869       xpaned->in_drag_horiz || xpaned->in_drag_vert_and_horiz)
1870
1871     {
1872       update_drag (xpaned);
1873       return TRUE;
1874     }
1875
1876   return FALSE;
1877 }
1878
1879 void
1880 gtk_xpaned_add_top_left (GtkXPaned * xpaned, GtkWidget * widget)
1881 {
1882   gtk_xpaned_pack_top_left (xpaned, widget, FALSE, TRUE);
1883 }
1884
1885 void
1886 gtk_xpaned_add_top_right (GtkXPaned * xpaned, GtkWidget * widget)
1887 {
1888   gtk_xpaned_pack_top_right (xpaned, widget, FALSE, TRUE);
1889 }
1890
1891 void
1892 gtk_xpaned_add_bottom_left (GtkXPaned * xpaned, GtkWidget * widget)
1893 {
1894   gtk_xpaned_pack_bottom_left (xpaned, widget, FALSE, TRUE);
1895 }
1896
1897 void
1898 gtk_xpaned_add_bottom_right (GtkXPaned * xpaned, GtkWidget * widget)
1899 {
1900   gtk_xpaned_pack_bottom_right (xpaned, widget, FALSE, TRUE);
1901 }
1902
1903 void
1904 gtk_xpaned_pack_top_left (GtkXPaned * xpaned,
1905                           GtkWidget * child, gboolean resize, gboolean shrink)
1906 {
1907   g_return_if_fail (GTK_IS_XPANED (xpaned));
1908   g_return_if_fail (GTK_IS_WIDGET (child));
1909
1910   if (!xpaned->top_left_child)
1911     {
1912       xpaned->top_left_child = child;
1913       xpaned->top_left_child_resize = resize;
1914       xpaned->top_left_child_shrink = shrink;
1915
1916       gtk_widget_set_parent (child, GTK_WIDGET (xpaned));
1917     }
1918 }
1919
1920 void
1921 gtk_xpaned_pack_top_right (GtkXPaned * xpaned,
1922                            GtkWidget * child,
1923                            gboolean resize, gboolean shrink)
1924 {
1925   g_return_if_fail (GTK_IS_XPANED (xpaned));
1926   g_return_if_fail (GTK_IS_WIDGET (child));
1927
1928   if (!xpaned->top_right_child)
1929     {
1930       xpaned->top_right_child = child;
1931       xpaned->top_right_child_resize = resize;
1932       xpaned->top_right_child_shrink = shrink;
1933
1934       gtk_widget_set_parent (child, GTK_WIDGET (xpaned));
1935     }
1936 }
1937
1938 void
1939 gtk_xpaned_pack_bottom_left (GtkXPaned * xpaned,
1940                              GtkWidget * child,
1941                              gboolean resize, gboolean shrink)
1942 {
1943   g_return_if_fail (GTK_IS_XPANED (xpaned));
1944   g_return_if_fail (GTK_IS_WIDGET (child));
1945
1946   if (!xpaned->bottom_left_child)
1947     {
1948       xpaned->bottom_left_child = child;
1949       xpaned->bottom_left_child_resize = resize;
1950       xpaned->bottom_left_child_shrink = shrink;
1951
1952       gtk_widget_set_parent (child, GTK_WIDGET (xpaned));
1953     }
1954 }
1955
1956 void
1957 gtk_xpaned_pack_bottom_right (GtkXPaned * xpaned,
1958                               GtkWidget * child,
1959                               gboolean resize, gboolean shrink)
1960 {
1961   g_return_if_fail (GTK_IS_XPANED (xpaned));
1962   g_return_if_fail (GTK_IS_WIDGET (child));
1963
1964   if (!xpaned->bottom_right_child)
1965     {
1966       xpaned->bottom_right_child = child;
1967       xpaned->bottom_right_child_resize = resize;
1968       xpaned->bottom_right_child_shrink = shrink;
1969
1970       gtk_widget_set_parent (child, GTK_WIDGET (xpaned));
1971     }
1972 }
1973
1974 static void
1975 gtk_xpaned_add (GtkContainer * container, GtkWidget * widget)
1976 {
1977   GtkXPaned *xpaned;
1978
1979   g_return_if_fail (GTK_IS_XPANED (container));
1980
1981   xpaned = GTK_XPANED (container);
1982
1983   if (!xpaned->top_left_child)
1984     gtk_xpaned_add_top_left (xpaned, widget);
1985   else if (!xpaned->top_right_child)
1986     gtk_xpaned_add_top_right (xpaned, widget);
1987   else if (!xpaned->bottom_left_child)
1988     gtk_xpaned_add_bottom_left (xpaned, widget);
1989   else if (!xpaned->bottom_right_child)
1990     gtk_xpaned_add_bottom_right (xpaned, widget);
1991   else
1992     g_warning ("GtkXPaned cannot have more than 4 children\n");
1993 }
1994
1995 static void
1996 gtk_xpaned_remove (GtkContainer * container, GtkWidget * widget)
1997 {
1998   GtkXPaned *xpaned;
1999   gboolean was_visible;
2000
2001   xpaned = GTK_XPANED (container);
2002   was_visible = gtk_widget_get_visible (widget);
2003
2004   if (xpaned->top_left_child == widget)
2005     {
2006       gtk_widget_unparent (widget);
2007
2008       xpaned->top_left_child = NULL;
2009
2010       if (was_visible && gtk_widget_get_visible (GTK_WIDGET (container)))
2011         gtk_widget_queue_resize (GTK_WIDGET (container));
2012     }
2013   else if (xpaned->top_right_child == widget)
2014     {
2015       gtk_widget_unparent (widget);
2016
2017       xpaned->top_right_child = NULL;
2018
2019       if (was_visible && gtk_widget_get_visible (GTK_WIDGET (container)))
2020         gtk_widget_queue_resize (GTK_WIDGET (container));
2021     }
2022   else if (xpaned->bottom_left_child == widget)
2023     {
2024       gtk_widget_unparent (widget);
2025
2026       xpaned->bottom_left_child = NULL;
2027
2028       if (was_visible && gtk_widget_get_visible (GTK_WIDGET (container)))
2029         gtk_widget_queue_resize (GTK_WIDGET (container));
2030     }
2031   else if (xpaned->bottom_right_child == widget)
2032     {
2033       gtk_widget_unparent (widget);
2034
2035       xpaned->bottom_right_child = NULL;
2036
2037       if (was_visible && gtk_widget_get_visible (GTK_WIDGET (container)))
2038         gtk_widget_queue_resize (GTK_WIDGET (container));
2039     }
2040   else
2041     g_warning ("GtkXPaned has no more children attached\n");
2042
2043 }
2044
2045 static void
2046 gtk_xpaned_forall (GtkContainer * container,
2047                    gboolean include_internals,
2048                    GtkCallback callback, gpointer callback_data)
2049 {
2050   GtkXPaned *xpaned;
2051
2052   g_return_if_fail (callback != NULL);
2053
2054   xpaned = GTK_XPANED (container);
2055
2056   if (xpaned->top_left_child)
2057     (*callback) (xpaned->top_left_child, callback_data);
2058   if (xpaned->top_right_child)
2059     (*callback) (xpaned->top_right_child, callback_data);
2060   if (xpaned->bottom_left_child)
2061     (*callback) (xpaned->bottom_left_child, callback_data);
2062   if (xpaned->bottom_right_child)
2063     (*callback) (xpaned->bottom_right_child, callback_data);
2064 }
2065
2066 /**
2067  * gtk_xpaned_get_position_x:
2068  * @paned: a #GtkXPaned widget
2069  *
2070  * Obtains the x-position of the divider.
2071  *
2072  * Return value: x-position of the divider
2073  **/
2074 gint
2075 gtk_xpaned_get_position_x (GtkXPaned * xpaned)
2076 {
2077   g_return_val_if_fail (GTK_IS_XPANED (xpaned), 0);
2078
2079   return xpaned->top_left_child_size.width;
2080 }
2081
2082 /**
2083  * gtk_xpaned_get_position_y:
2084  * @paned: a #GtkXPaned widget
2085  *
2086  * Obtains the y-position of the divider.
2087  *
2088  * Return value: y-position of the divider
2089  **/
2090 gint
2091 gtk_xpaned_get_position_y (GtkXPaned * xpaned)
2092 {
2093   g_return_val_if_fail (GTK_IS_XPANED (xpaned), 0);
2094
2095   return xpaned->top_left_child_size.height;
2096 }
2097
2098 /**
2099  * gtk_xpaned_set_position_x:
2100  * @paned: a #GtkXPaned widget
2101  * @xposition: pixel x-position of divider, a negative values
2102  *                         of a component mean that the position is unset.
2103  *
2104  * Sets the x-position of the divider between the four panes.
2105  **/
2106 void
2107 gtk_xpaned_set_position_x (GtkXPaned * xpaned, gint xposition)
2108 {
2109   GObject *object;
2110
2111   g_return_if_fail (GTK_IS_XPANED (xpaned));
2112
2113   /* if any child is currently maximized, jump right back */
2114   if (xpaned->maximized[GTK_XPANED_TOP_LEFT] ||
2115       xpaned->maximized[GTK_XPANED_TOP_RIGHT] ||
2116       xpaned->maximized[GTK_XPANED_BOTTOM_LEFT] ||
2117       xpaned->maximized[GTK_XPANED_BOTTOM_RIGHT])
2118     return;
2119
2120   object = G_OBJECT (xpaned);
2121
2122   if (xposition >= 0)
2123     {
2124       /* We don't clamp here - the assumption is that
2125        * if the total allocation changes at the same time
2126        * as the position, the position set is with reference
2127        * to the new total size. If only the position changes,
2128        * then clamping will occur in gtk_paned_compute_position()
2129        */
2130
2131       xpaned->top_left_child_size.width = xposition;
2132       xpaned->position_set = TRUE;
2133     }
2134   else
2135     {
2136       xpaned->position_set = FALSE;
2137     }
2138
2139   g_object_freeze_notify (object);
2140   g_object_notify (object, "x-position");
2141   g_object_notify (object, "position-set");
2142   g_object_thaw_notify (object);
2143
2144   gtk_widget_queue_resize (GTK_WIDGET (xpaned));
2145 }
2146
2147 /**
2148  * gtk_xpaned_set_position_y:
2149  * @paned: a #GtkXPaned widget
2150  * @yposition: pixel y-position of divider, a negative values
2151  *                         of a component mean that the position is unset.
2152  *
2153  * Sets the y-position of the divider between the four panes.
2154  **/
2155 void
2156 gtk_xpaned_set_position_y (GtkXPaned * xpaned, gint yposition)
2157 {
2158   GObject *object;
2159
2160   g_return_if_fail (GTK_IS_XPANED (xpaned));
2161
2162   /* if any child is currently maximized, jump right back */
2163   if (xpaned->maximized[GTK_XPANED_TOP_LEFT] ||
2164       xpaned->maximized[GTK_XPANED_TOP_RIGHT] ||
2165       xpaned->maximized[GTK_XPANED_BOTTOM_LEFT] ||
2166       xpaned->maximized[GTK_XPANED_BOTTOM_RIGHT])
2167     return;
2168
2169   object = G_OBJECT (xpaned);
2170
2171   if (yposition >= 0)
2172     {
2173       /* We don't clamp here - the assumption is that
2174        * if the total allocation changes at the same time
2175        * as the position, the position set is with reference
2176        * to the new total size. If only the position changes,
2177        * then clamping will occur in gtk_paned_compute_position()
2178        */
2179
2180       xpaned->top_left_child_size.height = yposition;
2181       xpaned->position_set = TRUE;
2182     }
2183   else
2184     {
2185       xpaned->position_set = FALSE;
2186     }
2187
2188   g_object_freeze_notify (object);
2189   g_object_notify (object, "y-position");
2190   g_object_notify (object, "position-set");
2191   g_object_thaw_notify (object);
2192
2193   gtk_widget_queue_resize (GTK_WIDGET (xpaned));
2194 }
2195
2196 /* this call is private and only intended for internal use! */
2197 void
2198 gtk_xpaned_save_unmaximized_x (GtkXPaned * xpaned)
2199 {
2200   xpaned->unmaximized_position.x = gtk_xpaned_get_position_x (xpaned);
2201 }
2202
2203 /* this call is private and only intended for internal use! */
2204 void
2205 gtk_xpaned_save_unmaximized_y (GtkXPaned * xpaned)
2206 {
2207   xpaned->unmaximized_position.y = gtk_xpaned_get_position_y (xpaned);
2208 }
2209
2210 /* this call is private and only intended for internal use! */
2211 gint
2212 gtk_xpaned_fetch_unmaximized_x (GtkXPaned * xpaned)
2213 {
2214   return xpaned->unmaximized_position.x;
2215 }
2216
2217 /* this call is private and only intended for internal use! */
2218 gint
2219 gtk_xpaned_fetch_unmaximized_y (GtkXPaned * xpaned)
2220 {
2221   return xpaned->unmaximized_position.y;
2222 }
2223
2224 /**
2225  * gtk_xpaned_get_top_left_child:
2226  * @xpaned: a #GtkXPaned widget
2227  *
2228  * Obtains the top-left child of the xpaned widget.
2229  *
2230  * Return value: top-left child, or %NULL if it is not set.
2231  *
2232  * Since: 2.4
2233  **/
2234 GtkWidget *
2235 gtk_xpaned_get_top_left_child (GtkXPaned * xpaned)
2236 {
2237   g_return_val_if_fail (GTK_IS_XPANED (xpaned), NULL);
2238
2239   return xpaned->top_left_child;
2240 }
2241
2242 /**
2243  * gtk_xpaned_get_top_right_child:
2244  * @xpaned: a #GtkXPaned widget
2245  *
2246  * Obtains the top-right child of the xpaned widget.
2247  *
2248  * Return value: top-right child, or %NULL if it is not set.
2249  *
2250  * Since: 2.4
2251  **/
2252 GtkWidget *
2253 gtk_xpaned_get_top_right_child (GtkXPaned * xpaned)
2254 {
2255   g_return_val_if_fail (GTK_IS_XPANED (xpaned), NULL);
2256
2257   return xpaned->top_right_child;
2258 }
2259
2260 /**
2261  * gtk_xpaned_get_bottom_left_child:
2262  * @xpaned: a #GtkXPaned widget
2263  *
2264  * Obtains the bottom-left child of the xpaned widget.
2265  *
2266  * Return value: bottom-left child, or %NULL if it is not set.
2267  *
2268  * Since: 2.4
2269  **/
2270 GtkWidget *
2271 gtk_xpaned_get_bottom_left_child (GtkXPaned * xpaned)
2272 {
2273   g_return_val_if_fail (GTK_IS_XPANED (xpaned), NULL);
2274
2275   return xpaned->bottom_left_child;
2276 }
2277
2278 /**
2279  * gtk_xpaned_get_bottom_right_child:
2280  * @xpaned: a #GtkXPaned widget
2281  *
2282  * Obtains the bottom-right child of the xpaned widget.
2283  *
2284  * Return value: bottom-right child, or %NULL if it is not set.
2285  *
2286  * Since: 2.4
2287  **/
2288 GtkWidget *
2289 gtk_xpaned_get_bottom_right_child (GtkXPaned * xpaned)
2290 {
2291   g_return_val_if_fail (GTK_IS_XPANED (xpaned), NULL);
2292
2293   return xpaned->bottom_right_child;
2294 }
2295
2296 gboolean
2297 gtk_xpaned_maximize_top_left (GtkXPaned * xpaned, gboolean maximize)
2298 {
2299   if (maximize)
2300     {
2301       /* see if any child is already maximized */
2302       if (!xpaned->maximized[GTK_XPANED_TOP_LEFT] &&
2303           !xpaned->maximized[GTK_XPANED_TOP_RIGHT] &&
2304           !xpaned->maximized[GTK_XPANED_BOTTOM_LEFT] &&
2305           !xpaned->maximized[GTK_XPANED_BOTTOM_RIGHT])
2306         {
2307           /* save current position */
2308           gtk_xpaned_save_unmaximized_x (xpaned);
2309           gtk_xpaned_save_unmaximized_y (xpaned);
2310
2311           /* set new maximized position */
2312           gtk_xpaned_set_position_x (xpaned, xpaned->max_position.x);
2313           gtk_xpaned_set_position_y (xpaned, xpaned->max_position.y);
2314
2315           /* mark maximized flag for top-left child */
2316           xpaned->maximized[GTK_XPANED_TOP_LEFT] = TRUE;
2317
2318           return TRUE;
2319         }
2320       /* already one child maximized, report error */
2321       else
2322         return FALSE;
2323     }
2324   else
2325     {
2326       /* verify that top-left child is really currently maximized */
2327       if (xpaned->maximized[GTK_XPANED_TOP_LEFT])
2328         {
2329           /* clear maximized flat for top-left child */
2330           xpaned->maximized[GTK_XPANED_TOP_LEFT] = FALSE;
2331
2332           /* restore unmaximized position */
2333           gtk_xpaned_set_position_x (xpaned,
2334                                      gtk_xpaned_fetch_unmaximized_x (xpaned));
2335           gtk_xpaned_set_position_y (xpaned,
2336                                      gtk_xpaned_fetch_unmaximized_y (xpaned));
2337
2338           return TRUE;
2339         }
2340       /* top-left child is currently not maximized, report error */
2341       else
2342         return FALSE;
2343     }
2344 }
2345
2346 gboolean
2347 gtk_xpaned_maximize_top_right (GtkXPaned * xpaned, gboolean maximize)
2348 {
2349   if (maximize)
2350     {
2351       /* see if any child is already maximized */
2352       if (!xpaned->maximized[GTK_XPANED_TOP_LEFT] &&
2353           !xpaned->maximized[GTK_XPANED_TOP_RIGHT] &&
2354           !xpaned->maximized[GTK_XPANED_BOTTOM_LEFT] &&
2355           !xpaned->maximized[GTK_XPANED_BOTTOM_RIGHT])
2356         {
2357           /* save current position */
2358           gtk_xpaned_save_unmaximized_x (xpaned);
2359           gtk_xpaned_save_unmaximized_y (xpaned);
2360
2361           /* set new maximized position */
2362           gtk_xpaned_set_position_x (xpaned, xpaned->min_position.x);
2363           gtk_xpaned_set_position_y (xpaned, xpaned->max_position.y);
2364
2365           /* mark maximized flag for top-right child */
2366           xpaned->maximized[GTK_XPANED_TOP_RIGHT] = TRUE;
2367
2368           return TRUE;
2369         }
2370       /* already one child maximized, report error */
2371       else
2372         return FALSE;
2373     }
2374   else
2375     {
2376       /* verify that top-right child is really currently maximized */
2377       if (xpaned->maximized[GTK_XPANED_TOP_RIGHT])
2378         {
2379           /* clear maximized flat for top-right child */
2380           xpaned->maximized[GTK_XPANED_TOP_RIGHT] = FALSE;
2381
2382           /* restore unmaximized position */
2383           gtk_xpaned_set_position_x (xpaned,
2384                                      gtk_xpaned_fetch_unmaximized_x (xpaned));
2385           gtk_xpaned_set_position_y (xpaned,
2386                                      gtk_xpaned_fetch_unmaximized_y (xpaned));
2387
2388           return TRUE;
2389         }
2390       /* top-right child is currently not maximized, report error */
2391       else
2392         return FALSE;
2393     }
2394 }
2395
2396 gboolean
2397 gtk_xpaned_maximize_bottom_left (GtkXPaned * xpaned, gboolean maximize)
2398 {
2399   if (maximize)
2400     {
2401       /* see if any child is already maximized */
2402       if (!xpaned->maximized[GTK_XPANED_TOP_LEFT] &&
2403           !xpaned->maximized[GTK_XPANED_TOP_RIGHT] &&
2404           !xpaned->maximized[GTK_XPANED_BOTTOM_LEFT] &&
2405           !xpaned->maximized[GTK_XPANED_BOTTOM_RIGHT])
2406         {
2407           /* save current position */
2408           gtk_xpaned_save_unmaximized_x (xpaned);
2409           gtk_xpaned_save_unmaximized_y (xpaned);
2410
2411           /* set new maximized position */
2412           gtk_xpaned_set_position_x (xpaned, xpaned->max_position.x);
2413           gtk_xpaned_set_position_y (xpaned, xpaned->min_position.y);
2414
2415           /* mark maximized flag for bottom-left child */
2416           xpaned->maximized[GTK_XPANED_BOTTOM_LEFT] = TRUE;
2417
2418           return TRUE;
2419         }
2420       /* already one child maximized, report error */
2421       else
2422         return FALSE;
2423     }
2424   else
2425     {
2426       /* verify that bottom-left child is really currently maximized */
2427       if (xpaned->maximized[GTK_XPANED_BOTTOM_LEFT])
2428         {
2429           /* clear maximized flat for bottom-left child */
2430           xpaned->maximized[GTK_XPANED_BOTTOM_LEFT] = FALSE;
2431
2432           /* restore unmaximized position */
2433           gtk_xpaned_set_position_x (xpaned,
2434                                      gtk_xpaned_fetch_unmaximized_x (xpaned));
2435           gtk_xpaned_set_position_y (xpaned,
2436                                      gtk_xpaned_fetch_unmaximized_y (xpaned));
2437
2438           return TRUE;
2439         }
2440       /* bottom-left child is currently not maximized, report error */
2441       else
2442         return FALSE;
2443     }
2444 }
2445
2446 gboolean
2447 gtk_xpaned_maximize_bottom_right (GtkXPaned * xpaned, gboolean maximize)
2448 {
2449   if (maximize)
2450     {
2451       /* see if any child is already maximized */
2452       if (!xpaned->maximized[GTK_XPANED_TOP_LEFT] &&
2453           !xpaned->maximized[GTK_XPANED_TOP_RIGHT] &&
2454           !xpaned->maximized[GTK_XPANED_BOTTOM_LEFT] &&
2455           !xpaned->maximized[GTK_XPANED_BOTTOM_RIGHT])
2456         {
2457           /* save current position */
2458           gtk_xpaned_save_unmaximized_x (xpaned);
2459           gtk_xpaned_save_unmaximized_y (xpaned);
2460
2461           /* set new maximized position */
2462           gtk_xpaned_set_position_x (xpaned, xpaned->min_position.x);
2463           gtk_xpaned_set_position_y (xpaned, xpaned->min_position.y);
2464
2465           /* mark maximized flag for bottom-right child */
2466           xpaned->maximized[GTK_XPANED_BOTTOM_RIGHT] = TRUE;
2467
2468           return TRUE;
2469         }
2470       /* already one child maximized, report error */
2471       else
2472         return FALSE;
2473     }
2474   else
2475     {
2476       /* verify that bottom-right child is really currently maximized */
2477       if (xpaned->maximized[GTK_XPANED_BOTTOM_RIGHT])
2478         {
2479           /* clear maximized flat for bottom-right child */
2480           xpaned->maximized[GTK_XPANED_BOTTOM_RIGHT] = FALSE;
2481
2482           /* restore unmaximized position */
2483           gtk_xpaned_set_position_x (xpaned,
2484                                      gtk_xpaned_fetch_unmaximized_x (xpaned));
2485           gtk_xpaned_set_position_y (xpaned,
2486                                      gtk_xpaned_fetch_unmaximized_y (xpaned));
2487
2488           return TRUE;
2489         }
2490       /* bottom-right child is currently not maximized, report error */
2491       else
2492         return FALSE;
2493     }
2494 }
2495
2496 void
2497 gtk_xpaned_compute_position (GtkXPaned * xpaned,
2498                              const GtkAllocation * allocation,
2499                              GtkRequisition * top_left_child_req,
2500                              GtkRequisition * top_right_child_req,
2501                              GtkRequisition * bottom_left_child_req,
2502                              GtkRequisition * bottom_right_child_req)
2503 {
2504   GdkPoint old_position;
2505   GdkPoint old_min_position;
2506   GdkPoint old_max_position;
2507   gint handle_size;
2508   gint border_width = gtk_container_get_border_width (GTK_CONTAINER (xpaned));
2509
2510   g_return_if_fail (GTK_IS_XPANED (xpaned));
2511
2512   old_position.x = xpaned->top_left_child_size.width;
2513   old_position.y = xpaned->top_left_child_size.height;
2514   old_min_position.x = xpaned->min_position.x;
2515   old_min_position.y = xpaned->min_position.y;
2516   old_max_position.x = xpaned->max_position.x;
2517   old_max_position.y = xpaned->max_position.y;
2518
2519   xpaned->min_position.x =
2520     xpaned->top_left_child_shrink ? 0 : top_left_child_req->width;
2521   xpaned->min_position.y =
2522     xpaned->top_left_child_shrink ? 0 : top_left_child_req->height;
2523
2524   gtk_widget_style_get (GTK_WIDGET (xpaned), "handle-size", &handle_size,
2525                         NULL);
2526
2527   xpaned->max_position.x = allocation->width - 2 * border_width - handle_size;
2528   xpaned->max_position.y =
2529     allocation->height - 2 * border_width - handle_size;
2530   if (!xpaned->top_left_child_shrink)
2531     xpaned->max_position.x =
2532       MAX (1, xpaned->max_position.x - top_left_child_req->width);
2533   xpaned->max_position.x =
2534     MAX (xpaned->min_position.x, xpaned->max_position.x);
2535
2536   if (!xpaned->position_set)
2537     {
2538       if (xpaned->top_left_child_resize && !xpaned->top_right_child_resize)
2539         {
2540           xpaned->top_left_child_size.width =
2541             MAX (0, allocation->width - top_right_child_req->width);
2542           xpaned->top_left_child_size.height =
2543             MAX (0, allocation->height - top_right_child_req->height);
2544         }
2545       else if (!xpaned->top_left_child_resize
2546                && xpaned->top_right_child_resize)
2547         {
2548           xpaned->top_left_child_size.width = top_left_child_req->width;
2549           xpaned->top_left_child_size.height = top_left_child_req->height;
2550         }
2551       else
2552         {
2553           xpaned->top_left_child_size.width = allocation->width * 0.5 + 0.5;
2554           xpaned->top_left_child_size.height = allocation->height * 0.5 + 0.5;
2555         }
2556     }
2557   else
2558     {
2559       /* If the position was set before the initial allocation.
2560       ** (paned->last_allocation <= 0) just clamp it and leave it. */
2561       if (xpaned->last_allocation.width > 0)
2562         {
2563           if (xpaned->top_left_child_resize
2564               && !xpaned->top_right_child_resize)
2565             {
2566               xpaned->top_left_child_size.width += allocation->width
2567                 - xpaned->last_allocation.width;
2568
2569               xpaned->top_left_child_size.height += allocation->height
2570                 - xpaned->last_allocation.height;
2571             }
2572           else
2573             if (!
2574                 (!xpaned->top_left_child_resize
2575                  && xpaned->top_right_child_resize))
2576               {
2577                 xpaned->top_left_child_size.width = allocation->width
2578                   * ((gdouble) xpaned->top_left_child_size.width /
2579                      (xpaned->last_allocation.width)) + 0.5;
2580
2581                 xpaned->top_left_child_size.height = allocation->height
2582                   * ((gdouble) xpaned->top_left_child_size.height /
2583                      (xpaned->last_allocation.height)) + 0.5;
2584               }
2585         }
2586       if (xpaned->last_allocation.height > 0)
2587         {
2588           if (xpaned->top_left_child_resize
2589               && !xpaned->top_right_child_resize)
2590             {
2591               xpaned->top_left_child_size.width +=
2592                 allocation->width - xpaned->last_allocation.width;
2593               xpaned->top_left_child_size.height +=
2594                 allocation->height - xpaned->last_allocation.height;
2595             }
2596           else
2597             if (!
2598                 (!xpaned->top_left_child_resize
2599                  && xpaned->top_right_child_resize))
2600               {
2601                 xpaned->top_left_child_size.width =
2602                   allocation->width *
2603                   ((gdouble) xpaned->top_left_child_size.width /
2604                    (xpaned->last_allocation.width)) + 0.5;
2605                 xpaned->top_left_child_size.height =
2606                   allocation->height *
2607                   ((gdouble) xpaned->top_left_child_size.height /
2608                    (xpaned->last_allocation.height)) + 0.5;
2609               }
2610         }
2611
2612     }
2613
2614   xpaned->top_left_child_size.width =
2615     CLAMP (xpaned->top_left_child_size.width, xpaned->min_position.x,
2616            xpaned->max_position.x);
2617   xpaned->top_left_child_size.height =
2618     CLAMP (xpaned->top_left_child_size.height, xpaned->min_position.y,
2619            xpaned->max_position.y);
2620
2621   xpaned->top_right_child_size.width =
2622     CLAMP (xpaned->top_right_child_size.width, xpaned->min_position.x,
2623            xpaned->max_position.x);
2624   xpaned->top_right_child_size.height =
2625     CLAMP (xpaned->top_right_child_size.height, xpaned->min_position.y,
2626            xpaned->max_position.y);
2627
2628   xpaned->bottom_left_child_size.width =
2629     CLAMP (xpaned->bottom_left_child_size.width, xpaned->min_position.x,
2630            xpaned->max_position.x);
2631   xpaned->bottom_left_child_size.height =
2632     CLAMP (xpaned->bottom_left_child_size.height, xpaned->min_position.y,
2633            xpaned->max_position.y);
2634
2635   xpaned->bottom_right_child_size.width =
2636     CLAMP (xpaned->bottom_right_child_size.width, xpaned->min_position.x,
2637            xpaned->max_position.x);
2638   xpaned->bottom_right_child_size.height =
2639     CLAMP (xpaned->bottom_right_child_size.height, xpaned->min_position.y,
2640            xpaned->max_position.y);
2641
2642   gtk_widget_set_child_visible (xpaned->top_left_child, TRUE);
2643   gtk_widget_set_child_visible (xpaned->top_right_child, TRUE);
2644   gtk_widget_set_child_visible (xpaned->bottom_left_child, TRUE);
2645   gtk_widget_set_child_visible (xpaned->bottom_right_child, TRUE);
2646
2647   g_object_freeze_notify (G_OBJECT (xpaned));
2648
2649   if (xpaned->top_left_child_size.width != old_position.x)
2650     g_object_notify (G_OBJECT (xpaned), "x-position");
2651   if (xpaned->top_left_child_size.height != old_position.y)
2652     g_object_notify (G_OBJECT (xpaned), "y-position");
2653
2654   if (xpaned->top_right_child_size.width != old_position.x)
2655     g_object_notify (G_OBJECT (xpaned), "x-position");
2656   if (xpaned->top_right_child_size.height != old_position.y)
2657     g_object_notify (G_OBJECT (xpaned), "y-position");
2658
2659   if (xpaned->bottom_left_child_size.width != old_position.x)
2660     g_object_notify (G_OBJECT (xpaned), "x-position");
2661   if (xpaned->bottom_left_child_size.height != old_position.y)
2662     g_object_notify (G_OBJECT (xpaned), "y-position");
2663
2664   if (xpaned->bottom_right_child_size.width != old_position.x)
2665     g_object_notify (G_OBJECT (xpaned), "x-position");
2666   if (xpaned->bottom_right_child_size.height != old_position.y)
2667     g_object_notify (G_OBJECT (xpaned), "y-position");
2668
2669   if (xpaned->min_position.x != old_min_position.x)
2670     g_object_notify (G_OBJECT (xpaned), "min-x-position");
2671   if (xpaned->min_position.y != old_min_position.y)
2672     g_object_notify (G_OBJECT (xpaned), "min-y-position");
2673
2674   if (xpaned->max_position.x != old_max_position.x)
2675     g_object_notify (G_OBJECT (xpaned), "max-y-position");
2676   if (xpaned->max_position.y != old_max_position.y)
2677     g_object_notify (G_OBJECT (xpaned), "max-y-position");
2678
2679   g_object_thaw_notify (G_OBJECT (xpaned));
2680
2681   xpaned->last_allocation.width = allocation->width;
2682   xpaned->last_allocation.height = allocation->height;
2683 }
2684
2685 static void
2686 gtk_xpaned_set_saved_focus (GtkXPaned * xpaned, GtkWidget * widget)
2687 {
2688   if (xpaned->priv->saved_focus)
2689     g_object_remove_weak_pointer (G_OBJECT (xpaned->priv->saved_focus),
2690                                   (gpointer *) & (xpaned->priv->saved_focus));
2691
2692   xpaned->priv->saved_focus = widget;
2693
2694   if (xpaned->priv->saved_focus)
2695     g_object_add_weak_pointer (G_OBJECT (xpaned->priv->saved_focus),
2696                                (gpointer *) & (xpaned->priv->saved_focus));
2697 }
2698
2699 static void
2700 gtk_xpaned_set_first_xpaned (GtkXPaned * xpaned, GtkXPaned * first_xpaned)
2701 {
2702   if (xpaned->priv->first_xpaned)
2703     g_object_remove_weak_pointer (G_OBJECT (xpaned->priv->first_xpaned),
2704                                   (gpointer *) & (xpaned->priv->
2705                                                   first_xpaned));
2706
2707   xpaned->priv->first_xpaned = first_xpaned;
2708
2709   if (xpaned->priv->first_xpaned)
2710     g_object_add_weak_pointer (G_OBJECT (xpaned->priv->first_xpaned),
2711                                (gpointer *) & (xpaned->priv->first_xpaned));
2712 }
2713
2714 static void
2715 gtk_xpaned_set_last_top_left_child_focus (GtkXPaned * xpaned,
2716                                           GtkWidget * widget)
2717 {
2718   if (xpaned->last_top_left_child_focus)
2719     g_object_remove_weak_pointer (G_OBJECT
2720                                   (xpaned->last_top_left_child_focus),
2721                                   (gpointer *) & (xpaned->
2722                                                   last_top_left_child_focus));
2723
2724   xpaned->last_top_left_child_focus = widget;
2725
2726   if (xpaned->last_top_left_child_focus)
2727     g_object_add_weak_pointer (G_OBJECT (xpaned->last_top_left_child_focus),
2728                                (gpointer *) & (xpaned->
2729                                                last_top_left_child_focus));
2730 }
2731
2732 static void
2733 gtk_xpaned_set_last_top_right_child_focus (GtkXPaned * xpaned,
2734                                            GtkWidget * widget)
2735 {
2736   if (xpaned->last_top_right_child_focus)
2737     g_object_remove_weak_pointer (G_OBJECT
2738                                   (xpaned->last_top_right_child_focus),
2739                                   (gpointer *) & (xpaned->
2740                                                   last_top_right_child_focus));
2741
2742   xpaned->last_top_right_child_focus = widget;
2743
2744   if (xpaned->last_top_right_child_focus)
2745     g_object_add_weak_pointer (G_OBJECT (xpaned->last_top_right_child_focus),
2746                                (gpointer *) & (xpaned->
2747                                                last_top_right_child_focus));
2748 }
2749
2750 static void
2751 gtk_xpaned_set_last_bottom_left_child_focus (GtkXPaned * xpaned,
2752                                              GtkWidget * widget)
2753 {
2754   if (xpaned->last_bottom_left_child_focus)
2755     g_object_remove_weak_pointer (G_OBJECT
2756                                   (xpaned->last_bottom_left_child_focus),
2757                                   (gpointer *) & (xpaned->
2758                                                   last_bottom_left_child_focus));
2759
2760   xpaned->last_bottom_left_child_focus = widget;
2761
2762   if (xpaned->last_bottom_left_child_focus)
2763     g_object_add_weak_pointer (G_OBJECT
2764                                (xpaned->last_bottom_left_child_focus),
2765                                (gpointer *) & (xpaned->
2766                                                last_bottom_left_child_focus));
2767 }
2768
2769 static void
2770 gtk_xpaned_set_last_bottom_right_child_focus (GtkXPaned * xpaned,
2771                                               GtkWidget * widget)
2772 {
2773   if (xpaned->last_bottom_right_child_focus)
2774     g_object_remove_weak_pointer (G_OBJECT
2775                                   (xpaned->last_bottom_right_child_focus),
2776                                   (gpointer *) & (xpaned->
2777                                                   last_bottom_right_child_focus));
2778
2779   xpaned->last_bottom_right_child_focus = widget;
2780
2781   if (xpaned->last_bottom_right_child_focus)
2782     g_object_add_weak_pointer (G_OBJECT
2783                                (xpaned->last_bottom_right_child_focus),
2784                                (gpointer *) & (xpaned->
2785                                                last_bottom_right_child_focus));
2786 }
2787
2788 static GtkWidget *
2789 xpaned_get_focus_widget (GtkXPaned * xpaned)
2790 {
2791   GtkWidget *toplevel;
2792
2793   toplevel = gtk_widget_get_toplevel (GTK_WIDGET (xpaned));
2794   if (gtk_widget_is_toplevel (toplevel))
2795     return gtk_window_get_focus (GTK_WINDOW (toplevel));
2796
2797   return NULL;
2798 }
2799
2800 static void
2801 gtk_xpaned_set_focus_child (GtkContainer * container, GtkWidget * focus_child)
2802 {
2803   GtkXPaned *xpaned;
2804
2805   g_return_if_fail (GTK_IS_XPANED (container));
2806
2807   xpaned = GTK_XPANED (container);
2808
2809   if (focus_child == NULL)
2810     {
2811       GtkWidget *last_focus;
2812       GtkWidget *w;
2813
2814       last_focus = xpaned_get_focus_widget (xpaned);
2815
2816       if (last_focus)
2817         {
2818           /* If there is one or more paned widgets between us and the
2819            * focus widget, we want the topmost of those as last_focus
2820            */
2821           for (w = last_focus; w != GTK_WIDGET (xpaned); w = gtk_widget_get_parent (w))
2822             if (GTK_IS_XPANED (w))
2823               last_focus = w;
2824
2825           if (gtk_container_get_focus_child (container) == xpaned->top_left_child)
2826             gtk_xpaned_set_last_top_left_child_focus (xpaned, last_focus);
2827           else if (gtk_container_get_focus_child (container) == xpaned->top_right_child)
2828             gtk_xpaned_set_last_top_right_child_focus (xpaned, last_focus);
2829           else if (gtk_container_get_focus_child (container) == xpaned->bottom_left_child)
2830             gtk_xpaned_set_last_bottom_left_child_focus (xpaned, last_focus);
2831           else if (gtk_container_get_focus_child (container) == xpaned->bottom_right_child)
2832             gtk_xpaned_set_last_bottom_right_child_focus (xpaned, last_focus);
2833         }
2834     }
2835
2836   if (parent_class->set_focus_child)
2837     (*parent_class->set_focus_child) (container, focus_child);
2838 }
2839
2840 static void
2841 gtk_xpaned_get_cycle_chain (GtkXPaned * xpaned,
2842                             GtkDirectionType direction, GList ** widgets)
2843 {
2844   GtkContainer *container = GTK_CONTAINER (xpaned);
2845   GtkWidget *ancestor = NULL;
2846   GList *temp_list = NULL;
2847   GList *list;
2848
2849   if (xpaned->in_recursion)
2850     return;
2851
2852   g_assert (widgets != NULL);
2853
2854   if (xpaned->last_top_left_child_focus &&
2855       !gtk_widget_is_ancestor (xpaned->last_top_left_child_focus,
2856                                GTK_WIDGET (xpaned)))
2857     {
2858       gtk_xpaned_set_last_top_left_child_focus (xpaned, NULL);
2859     }
2860
2861   if (xpaned->last_top_right_child_focus &&
2862       !gtk_widget_is_ancestor (xpaned->last_top_right_child_focus,
2863                                GTK_WIDGET (xpaned)))
2864     {
2865       gtk_xpaned_set_last_top_right_child_focus (xpaned, NULL);
2866     }
2867
2868   if (xpaned->last_bottom_left_child_focus &&
2869       !gtk_widget_is_ancestor (xpaned->last_bottom_left_child_focus,
2870                                GTK_WIDGET (xpaned)))
2871     {
2872       gtk_xpaned_set_last_bottom_left_child_focus (xpaned, NULL);
2873     }
2874
2875   if (xpaned->last_bottom_right_child_focus &&
2876       !gtk_widget_is_ancestor (xpaned->last_bottom_right_child_focus,
2877                                GTK_WIDGET (xpaned)))
2878     {
2879       gtk_xpaned_set_last_bottom_right_child_focus (xpaned, NULL);
2880     }
2881
2882   if (gtk_widget_get_parent (GTK_WIDGET (xpaned)))
2883     ancestor = gtk_widget_get_ancestor (gtk_widget_get_parent (GTK_WIDGET (xpaned)),
2884                                         GTK_TYPE_XPANED);
2885
2886   /* The idea here is that temp_list is a list of widgets we want to cycle
2887    * to. The list is prioritized so that the first element is our first
2888    * choice, the next our second, and so on.
2889    *
2890    * We can't just use g_list_reverse(), because we want to try
2891    * paned->last_child?_focus before paned->child?, both when we
2892    * are going forward and backward.
2893    */
2894   if (direction == GTK_DIR_TAB_FORWARD)
2895     {
2896       if (gtk_container_get_focus_child (container) == xpaned->top_left_child)
2897         {
2898           temp_list =
2899             g_list_append (temp_list, xpaned->last_top_right_child_focus);
2900           temp_list = g_list_append (temp_list, xpaned->top_right_child);
2901           temp_list = g_list_append (temp_list, ancestor);
2902         }
2903       else if (gtk_container_get_focus_child (container) == xpaned->top_right_child)
2904         {
2905           temp_list = g_list_append (temp_list, ancestor);
2906           temp_list =
2907             g_list_append (temp_list, xpaned->last_bottom_left_child_focus);
2908           temp_list = g_list_append (temp_list, xpaned->bottom_left_child);
2909         }
2910       else if (gtk_container_get_focus_child (container) == xpaned->bottom_left_child)
2911         {
2912           temp_list = g_list_append (temp_list, ancestor);
2913           temp_list =
2914             g_list_append (temp_list, xpaned->last_bottom_right_child_focus);
2915           temp_list = g_list_append (temp_list, xpaned->bottom_right_child);
2916         }
2917       else if (gtk_container_get_focus_child (container) == xpaned->bottom_right_child)
2918         {
2919           temp_list = g_list_append (temp_list, ancestor);
2920           temp_list =
2921             g_list_append (temp_list, xpaned->last_top_left_child_focus);
2922           temp_list = g_list_append (temp_list, xpaned->top_left_child);
2923         }
2924       else
2925         {
2926           temp_list =
2927             g_list_append (temp_list, xpaned->last_top_left_child_focus);
2928           temp_list = g_list_append (temp_list, xpaned->top_left_child);
2929           temp_list =
2930             g_list_append (temp_list, xpaned->last_top_right_child_focus);
2931           temp_list = g_list_append (temp_list, xpaned->top_right_child);
2932           temp_list =
2933             g_list_append (temp_list, xpaned->last_bottom_left_child_focus);
2934           temp_list = g_list_append (temp_list, xpaned->bottom_left_child);
2935           temp_list =
2936             g_list_append (temp_list, xpaned->last_bottom_right_child_focus);
2937           temp_list = g_list_append (temp_list, xpaned->bottom_right_child);
2938           temp_list = g_list_append (temp_list, ancestor);
2939         }
2940     }
2941   else
2942     {
2943       if (gtk_container_get_focus_child (container) == xpaned->top_left_child)
2944         {
2945           temp_list = g_list_append (temp_list, ancestor);
2946           temp_list =
2947             g_list_append (temp_list, xpaned->last_top_right_child_focus);
2948           temp_list = g_list_append (temp_list, xpaned->top_right_child);
2949         }
2950       else if (gtk_container_get_focus_child (container) == xpaned->top_right_child)
2951         {
2952           temp_list =
2953             g_list_append (temp_list, xpaned->last_bottom_left_child_focus);
2954           temp_list = g_list_append (temp_list, xpaned->bottom_left_child);
2955           temp_list = g_list_append (temp_list, ancestor);
2956         }
2957       else if (gtk_container_get_focus_child (container) == xpaned->bottom_right_child)
2958         {
2959           temp_list =
2960             g_list_append (temp_list, xpaned->last_bottom_left_child_focus);
2961           temp_list = g_list_append (temp_list, xpaned->bottom_left_child);
2962           temp_list = g_list_append (temp_list, ancestor);
2963         }
2964       else if (gtk_container_get_focus_child (container) == xpaned->top_right_child)
2965         {
2966           temp_list =
2967             g_list_append (temp_list, xpaned->last_bottom_left_child_focus);
2968           temp_list = g_list_append (temp_list, xpaned->bottom_left_child);
2969           temp_list = g_list_append (temp_list, ancestor);
2970         }
2971       else
2972         {
2973           temp_list =
2974             g_list_append (temp_list, xpaned->last_bottom_right_child_focus);
2975           temp_list = g_list_append (temp_list, xpaned->bottom_right_child);
2976           temp_list =
2977             g_list_append (temp_list, xpaned->last_bottom_left_child_focus);
2978           temp_list = g_list_append (temp_list, xpaned->bottom_left_child);
2979           temp_list =
2980             g_list_append (temp_list, xpaned->last_top_right_child_focus);
2981           temp_list = g_list_append (temp_list, xpaned->top_right_child);
2982           temp_list =
2983             g_list_append (temp_list, xpaned->last_top_left_child_focus);
2984           temp_list = g_list_append (temp_list, xpaned->top_left_child);
2985           temp_list = g_list_append (temp_list, ancestor);
2986         }
2987     }
2988
2989   /* Walk the list and expand all the paned widgets. */
2990   for (list = temp_list; list != NULL; list = list->next)
2991     {
2992       GtkWidget *widget = list->data;
2993
2994       if (widget)
2995         {
2996           if (GTK_IS_XPANED (widget))
2997             {
2998               xpaned->in_recursion = TRUE;
2999               gtk_xpaned_get_cycle_chain (GTK_XPANED (widget),
3000                                           direction, widgets);
3001               xpaned->in_recursion = FALSE;
3002             }
3003           else
3004             {
3005               *widgets = g_list_append (*widgets, widget);
3006             }
3007         }
3008     }
3009
3010   g_list_free (temp_list);
3011 }
3012
3013 static gboolean
3014 gtk_xpaned_cycle_child_focus (GtkXPaned * xpaned, gboolean reversed)
3015 {
3016   GList *cycle_chain = NULL;
3017   GList *list;
3018
3019   GtkDirectionType direction =
3020     reversed ? GTK_DIR_TAB_BACKWARD : GTK_DIR_TAB_FORWARD;
3021
3022   /* ignore f6 if the handle is focused */
3023   if (gtk_widget_is_focus (GTK_WIDGET (xpaned)))
3024     return TRUE;
3025
3026   /* we can't just let the event propagate up the hierarchy,
3027    * because the paned will want to cycle focus _unless_ an
3028    * ancestor paned handles the event
3029    */
3030   gtk_xpaned_get_cycle_chain (xpaned, direction, &cycle_chain);
3031
3032   for (list = cycle_chain; list != NULL; list = list->next)
3033     if (gtk_widget_child_focus (GTK_WIDGET (list->data), direction))
3034       break;
3035
3036   g_list_free (cycle_chain);
3037
3038   return TRUE;
3039 }
3040
3041 static void
3042 get_child_xpanes (GtkWidget * widget, GList ** xpanes)
3043 {
3044   if (GTK_IS_XPANED (widget))
3045     {
3046       GtkXPaned *xpaned = GTK_XPANED (widget);
3047
3048       get_child_xpanes (xpaned->top_left_child, xpanes);
3049       *xpanes = g_list_prepend (*xpanes, widget);
3050       get_child_xpanes (xpaned->top_right_child, xpanes);
3051       *xpanes = g_list_prepend (*xpanes, widget);
3052       get_child_xpanes (xpaned->bottom_left_child, xpanes);
3053       *xpanes = g_list_prepend (*xpanes, widget);
3054       get_child_xpanes (xpaned->bottom_right_child, xpanes);
3055     }
3056   else if (GTK_IS_CONTAINER (widget))
3057     {
3058       gtk_container_foreach (GTK_CONTAINER (widget),
3059                              (GtkCallback) get_child_xpanes, xpanes);
3060     }
3061 }
3062
3063 static GList *
3064 get_all_xpanes (GtkXPaned * xpaned)
3065 {
3066   GtkXPaned *topmost = NULL;
3067   GList *result = NULL;
3068   GtkWidget *w;
3069
3070   for (w = GTK_WIDGET (xpaned); w != NULL; w = gtk_widget_get_parent (w))
3071     {
3072       if (GTK_IS_XPANED (w))
3073         topmost = GTK_XPANED (w);
3074     }
3075
3076   g_assert (topmost);
3077
3078   get_child_xpanes (GTK_WIDGET (topmost), &result);
3079
3080   return g_list_reverse (result);
3081 }
3082
3083 static void
3084 gtk_xpaned_find_neighbours (GtkXPaned * xpaned,
3085                             GtkXPaned ** next, GtkXPaned ** prev)
3086 {
3087   GList *all_xpanes;
3088   GList *this_link;
3089
3090   all_xpanes = get_all_xpanes (xpaned);
3091   g_assert (all_xpanes);
3092
3093   this_link = g_list_find (all_xpanes, xpaned);
3094
3095   g_assert (this_link);
3096
3097   if (this_link->next)
3098     *next = this_link->next->data;
3099   else
3100     *next = all_xpanes->data;
3101
3102   if (this_link->prev)
3103     *prev = this_link->prev->data;
3104   else
3105     *prev = g_list_last (all_xpanes)->data;
3106
3107   g_list_free (all_xpanes);
3108 }
3109
3110 static gboolean
3111 gtk_xpaned_move_handle (GtkXPaned * xpaned, GtkScrollType scroll)
3112 {
3113   if (gtk_widget_is_focus (GTK_WIDGET (xpaned)))
3114     {
3115       GdkPoint old_position;
3116       GdkPoint new_position;
3117       gint increment;
3118
3119       enum
3120       {
3121         SINGLE_STEP_SIZE = 1,
3122         PAGE_STEP_SIZE = 75
3123       };
3124
3125       new_position.x = old_position.x = gtk_xpaned_get_position_x (xpaned);
3126       new_position.y = old_position.y = gtk_xpaned_get_position_y (xpaned);
3127       increment = 0;
3128
3129       switch (scroll)
3130         {
3131         case GTK_SCROLL_STEP_LEFT:
3132         case GTK_SCROLL_STEP_UP:
3133         case GTK_SCROLL_STEP_BACKWARD:
3134           increment = -SINGLE_STEP_SIZE;
3135           break;
3136
3137         case GTK_SCROLL_STEP_RIGHT:
3138         case GTK_SCROLL_STEP_DOWN:
3139         case GTK_SCROLL_STEP_FORWARD:
3140           increment = SINGLE_STEP_SIZE;
3141           break;
3142
3143         case GTK_SCROLL_PAGE_LEFT:
3144         case GTK_SCROLL_PAGE_UP:
3145         case GTK_SCROLL_PAGE_BACKWARD:
3146           increment = -PAGE_STEP_SIZE;
3147           break;
3148
3149         case GTK_SCROLL_PAGE_RIGHT:
3150         case GTK_SCROLL_PAGE_DOWN:
3151         case GTK_SCROLL_PAGE_FORWARD:
3152           increment = PAGE_STEP_SIZE;
3153           break;
3154
3155         case GTK_SCROLL_START:
3156           new_position.x = xpaned->min_position.x;
3157           new_position.y = xpaned->min_position.y;
3158           break;
3159
3160         case GTK_SCROLL_END:
3161           new_position.x = xpaned->max_position.x;
3162           new_position.y = xpaned->max_position.y;
3163           break;
3164
3165         default:
3166           break;
3167         }
3168
3169       if (increment)
3170         {
3171           if (is_rtl (xpaned))
3172             increment = -increment;
3173
3174           new_position.x = old_position.x + increment;
3175           new_position.y = old_position.y + increment;
3176         }
3177
3178       new_position.x = CLAMP (new_position.x,
3179                               xpaned->min_position.x, xpaned->max_position.x);
3180
3181       new_position.y = CLAMP (new_position.y,
3182                               xpaned->min_position.y, xpaned->max_position.y);
3183
3184       if (old_position.x != new_position.x)
3185         gtk_xpaned_set_position_x (xpaned, new_position.x);
3186
3187       if (old_position.y != new_position.y)
3188         gtk_xpaned_set_position_y (xpaned, new_position.y);
3189
3190       return TRUE;
3191     }
3192
3193   return FALSE;
3194 }
3195
3196 static void
3197 gtk_xpaned_restore_focus (GtkXPaned * xpaned)
3198 {
3199   if (gtk_widget_is_focus (GTK_WIDGET (xpaned)))
3200     {
3201       if (xpaned->priv->saved_focus &&
3202           gtk_widget_get_sensitive (xpaned->priv->saved_focus))
3203         {
3204           gtk_widget_grab_focus (xpaned->priv->saved_focus);
3205         }
3206       else
3207         {
3208           /* the saved focus is somehow not available for focusing,
3209            * try
3210            *   1) tabbing into the paned widget
3211            * if that didn't work,
3212            *   2) unset focus for the window if there is one
3213            */
3214
3215           if (!gtk_widget_child_focus
3216               (GTK_WIDGET (xpaned), GTK_DIR_TAB_FORWARD))
3217             {
3218               GtkWidget *toplevel =
3219                 gtk_widget_get_toplevel (GTK_WIDGET (xpaned));
3220
3221               if (GTK_IS_WINDOW (toplevel))
3222                 gtk_window_set_focus (GTK_WINDOW (toplevel), NULL);
3223             }
3224         }
3225
3226       gtk_xpaned_set_saved_focus (xpaned, NULL);
3227       gtk_xpaned_set_first_xpaned (xpaned, NULL);
3228     }
3229 }
3230
3231 static gboolean
3232 gtk_xpaned_accept_position (GtkXPaned * xpaned)
3233 {
3234   if (gtk_widget_is_focus (GTK_WIDGET (xpaned)))
3235     {
3236       xpaned->original_position.x = -1;
3237       xpaned->original_position.y = -1;
3238       gtk_xpaned_restore_focus (xpaned);
3239
3240       return TRUE;
3241     }
3242
3243   return FALSE;
3244 }
3245
3246 static gboolean
3247 gtk_xpaned_cancel_position (GtkXPaned * xpaned)
3248 {
3249   if (gtk_widget_is_focus (GTK_WIDGET (xpaned)))
3250     {
3251       if (xpaned->original_position.x != -1)
3252         {
3253           gtk_xpaned_set_position_x (xpaned, xpaned->original_position.x);
3254           xpaned->original_position.x = -1;
3255         }
3256
3257       if (xpaned->original_position.y != -1)
3258         {
3259           gtk_xpaned_set_position_y (xpaned, xpaned->original_position.y);
3260           xpaned->original_position.y = -1;
3261         }
3262
3263       gtk_xpaned_restore_focus (xpaned);
3264       return TRUE;
3265     }
3266
3267   return FALSE;
3268 }
3269
3270 static gboolean
3271 gtk_xpaned_cycle_handle_focus (GtkXPaned * xpaned, gboolean reversed)
3272 {
3273   GtkXPaned *next;
3274   GtkXPaned *prev;
3275
3276   if (gtk_widget_is_focus (GTK_WIDGET (xpaned)))
3277     {
3278       GtkXPaned *focus = NULL;
3279
3280       if (!xpaned->priv->first_xpaned)
3281         {
3282           /* The first_pane has disappeared. As an ad-hoc solution,
3283            * we make the currently focused paned the first_paned. To the
3284            * user this will seem like the paned cycling has been reset.
3285            */
3286           gtk_xpaned_set_first_xpaned (xpaned, xpaned);
3287         }
3288
3289       gtk_xpaned_find_neighbours (xpaned, &next, &prev);
3290
3291       if (reversed && prev &&
3292           prev != xpaned && xpaned != xpaned->priv->first_xpaned)
3293         {
3294           focus = prev;
3295         }
3296       else if (!reversed &&
3297                next && next != xpaned && next != xpaned->priv->first_xpaned)
3298         {
3299           focus = next;
3300         }
3301       else
3302         {
3303           gtk_xpaned_accept_position (xpaned);
3304           return TRUE;
3305         }
3306
3307       g_assert (focus);
3308
3309       gtk_xpaned_set_saved_focus (focus, xpaned->priv->saved_focus);
3310       gtk_xpaned_set_first_xpaned (focus, xpaned->priv->first_xpaned);
3311
3312       gtk_xpaned_set_saved_focus (xpaned, NULL);
3313       gtk_xpaned_set_first_xpaned (xpaned, NULL);
3314
3315       gtk_widget_grab_focus (GTK_WIDGET (focus));
3316
3317       if (!gtk_widget_is_focus (GTK_WIDGET (xpaned)))
3318         {
3319           xpaned->original_position.x = -1;
3320           xpaned->original_position.y = -1;
3321           focus->original_position.x = gtk_xpaned_get_position_x (focus);
3322           focus->original_position.y = gtk_xpaned_get_position_y (focus);
3323         }
3324     }
3325   else
3326     {
3327       GtkContainer *container = GTK_CONTAINER (xpaned);
3328       GtkXPaned *focus;
3329       GtkXPaned *first;
3330       GtkXPaned *prev;
3331       GtkXPaned *next;
3332       GtkWidget *toplevel;
3333
3334       gtk_xpaned_find_neighbours (xpaned, &next, &prev);
3335
3336       if (gtk_container_get_focus_child (container) == xpaned->top_left_child)
3337         {
3338           if (reversed)
3339             {
3340               focus = prev;
3341               first = xpaned;
3342             }
3343           else
3344             {
3345               focus = xpaned;
3346               first = xpaned;
3347             }
3348         }
3349       else if (gtk_container_get_focus_child (container) == xpaned->top_right_child)
3350         {
3351           if (reversed)
3352             {
3353               focus = xpaned;
3354               first = next;
3355             }
3356           else
3357             {
3358               focus = next;
3359               first = next;
3360             }
3361         }
3362       else
3363         {
3364           /* Focus is not inside this xpaned, and we don't have focus.
3365            * Presumably this happened because the application wants us
3366            * to start keyboard navigating.
3367            */
3368           focus = xpaned;
3369
3370           if (reversed)
3371             first = xpaned;
3372           else
3373             first = next;
3374         }
3375
3376       toplevel = gtk_widget_get_toplevel (GTK_WIDGET (xpaned));
3377
3378       if (GTK_IS_WINDOW (toplevel))
3379         gtk_xpaned_set_saved_focus (focus,
3380                                     gtk_window_get_focus (GTK_WINDOW (toplevel)));
3381       gtk_xpaned_set_first_xpaned (focus, first);
3382       focus->original_position.x = gtk_xpaned_get_position_x (focus);
3383       focus->original_position.y = gtk_xpaned_get_position_y (focus);
3384
3385       gtk_widget_grab_focus (GTK_WIDGET (focus));
3386     }
3387
3388   return TRUE;
3389 }
3390
3391 static gboolean
3392 gtk_xpaned_toggle_handle_focus (GtkXPaned * xpaned)
3393 {
3394   /* This function/signal has the wrong name. It is called when you
3395    * press Tab or Shift-Tab and what we do is act as if
3396    * the user pressed Return and then Tab or Shift-Tab
3397    */
3398   if (gtk_widget_is_focus (GTK_WIDGET (xpaned)))
3399     gtk_xpaned_accept_position (xpaned);
3400
3401   return FALSE;
3402 }
3403
3404 /*#define __GTK_XPANED_C__*/
3405 /*#include "gtkaliasdef.c"*/