Pileus Git - ~andy/gtk/blob - gtk/gtkhandlebox.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  * Copyright (C) 1998 Elliot Lee
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  23  * file for a list of people on the GTK+ Team.  See the ChangeLog
  24  * files for a list of changes.  These files are distributed with
  25  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  26  */
  27
  28 #include <config.h>
  29 #include <stdlib.h>
  30 #include "gtkhandlebox.h"
  31 #include "gtkinvisible.h"
  32 #include "gtkmain.h"
  33 #include "gtkmarshalers.h"
  34 #include "gtkwindow.h"
  35 #include "gtkprivate.h"
  36 #include "gtkintl.h"
  37 #include "gtkalias.h"
  38
  39 typedef struct _GtkHandleBoxPrivate GtkHandleBoxPrivate;
  40
  41 struct _GtkHandleBoxPrivate
  42 {
  43   gint orig_x;
  44   gint orig_y;
  45 };
  46
  47 enum {
  48   PROP_0,
  49   PROP_SHADOW,
  50   PROP_SHADOW_TYPE,
  51   PROP_HANDLE_POSITION,
  52   PROP_SNAP_EDGE,
  53   PROP_SNAP_EDGE_SET
  54 };
  55
  56 #define DRAG_HANDLE_SIZE 10
  57 #define CHILDLESS_SIZE  25
  58 #define GHOST_HEIGHT 3
  59 #define TOLERANCE 5
  60
  61 enum {
  62   SIGNAL_CHILD_ATTACHED,
  63   SIGNAL_CHILD_DETACHED,
  64   SIGNAL_LAST
  65 };
  66
  67 /* The algorithm for docking and redocking implemented here
  68  * has a couple of nice properties:
  69  *
  70  * 1) During a single drag, docking always occurs at the
  71  *    the same cursor position. This means that the users
  72  *    motions are reversible, and that you won't
  73  *    undock/dock oscillations.
  74  *
  75  * 2) Docking generally occurs at user-visible features.
  76  *    The user, once they figure out to redock, will
  77  *    have useful information about doing it again in
  78  *    the future.
  79  *
  80  * Please try to preserve these properties if you
  81  * change the algorithm. (And the current algorithm
  82  * is far from ideal). Briefly, the current algorithm
  83  * for deciding whether the handlebox is docked or not:
  84  *
  85  * 1) The decision is done by comparing two rectangles - the
  86  *    allocation if the widget at the start of the drag,
  87  *    and the boundary of hb->bin_window at the start of
  88  *    of the drag offset by the distance that the cursor
  89  *    has moved.
  90  *
  91  * 2) These rectangles must have one edge, the "snap_edge"
  92  *    of the handlebox, aligned within TOLERANCE.
  93  *
  94  * 3) On the other dimension, the extents of one rectangle
  95  *    must be contained in the extents of the other,
  96  *    extended by tolerance. That is, either we can have:
  97  *
  98  * <-TOLERANCE-|--------bin_window--------------|-TOLERANCE->
  99  *         <--------float_window-------------------->
 100  *
 101  * or we can have:
 102  *
 103  * <-TOLERANCE-|------float_window--------------|-TOLERANCE->
 104  *          <--------bin_window-------------------->
 105  */
 106
 107 static void gtk_handle_box_set_property   (GObject      *object,
 108                                            guint         param_id,
 109                                            const GValue *value,
 110                                            GParamSpec   *pspec);
 111 static void gtk_handle_box_get_property   (GObject     *object,
 112                                            guint        param_id,
 113                                            GValue      *value,
 114                                            GParamSpec  *pspec);
 115 static void gtk_handle_box_destroy        (GtkObject         *object);
 116 static void gtk_handle_box_map            (GtkWidget         *widget);
 117 static void gtk_handle_box_unmap          (GtkWidget         *widget);
 118 static void gtk_handle_box_realize        (GtkWidget         *widget);
 119 static void gtk_handle_box_unrealize      (GtkWidget         *widget);
 120 static void gtk_handle_box_style_set      (GtkWidget         *widget,
 121                                            GtkStyle          *previous_style);
 122 static void gtk_handle_box_size_request   (GtkWidget         *widget,
 123                                            GtkRequisition    *requisition);
 124 static void gtk_handle_box_size_allocate  (GtkWidget         *widget,
 125                                            GtkAllocation     *real_allocation);
 126 static void gtk_handle_box_add            (GtkContainer      *container,
 127                                            GtkWidget         *widget);
 128 static void gtk_handle_box_remove         (GtkContainer      *container,
 129                                            GtkWidget         *widget);
 130 static void gtk_handle_box_draw_ghost     (GtkHandleBox      *hb);
 131 static void gtk_handle_box_paint          (GtkWidget         *widget,
 132                                            GdkEventExpose    *event,
 133                                            GdkRectangle      *area);
 134 static gint gtk_handle_box_expose         (GtkWidget         *widget,
 135                                            GdkEventExpose    *event);
 136 static gint gtk_handle_box_button_changed (GtkWidget         *widget,
 137                                            GdkEventButton    *event);
 138 static gint gtk_handle_box_motion         (GtkWidget         *widget,
 139                                            GdkEventMotion    *event);
 140 static gint gtk_handle_box_delete_event   (GtkWidget         *widget,
 141                                            GdkEventAny       *event);
 142 static void gtk_handle_box_reattach       (GtkHandleBox      *hb);
 143 static void gtk_handle_box_end_drag       (GtkHandleBox      *hb,
 144                                            guint32            time);
 145
 146 static guint        handle_box_signals[SIGNAL_LAST] = { 0 };
 147
 148 G_DEFINE_TYPE (GtkHandleBox, gtk_handle_box, GTK_TYPE_BIN)
 149
 150 static void
 151 gtk_handle_box_class_init (GtkHandleBoxClass *class)
 152 {
 153   GObjectClass *gobject_class;
 154   GtkObjectClass *object_class;
 155   GtkWidgetClass *widget_class;
 156   GtkContainerClass *container_class;
 157
 158   gobject_class = (GObjectClass *) class;
 159   object_class = (GtkObjectClass *) class;
 160   widget_class = (GtkWidgetClass *) class;
 161   container_class = (GtkContainerClass *) class;
 162
 163   gobject_class->set_property = gtk_handle_box_set_property;
 164   gobject_class->get_property = gtk_handle_box_get_property;
 165
 166   g_object_class_install_property (gobject_class,
 167                                    PROP_SHADOW,
 168                                    g_param_spec_enum ("shadow", NULL,
 169                                                       P_("Deprecated property, use shadow_type instead"),
 170                                                       GTK_TYPE_SHADOW_TYPE,
 171                                                       GTK_SHADOW_ETCHED_OUT,
 172                                                       GTK_PARAM_READWRITE));
 173   g_object_class_install_property (gobject_class,
 174                                    PROP_SHADOW_TYPE,
 175                                    g_param_spec_enum ("shadow-type",
 176                                                       P_("Shadow type"),
 177                                                       P_("Appearance of the shadow that surrounds the container"),
 178                                                       GTK_TYPE_SHADOW_TYPE,
 179                                                       GTK_SHADOW_ETCHED_OUT,
 180                                                       GTK_PARAM_READWRITE));
 181
 182   g_object_class_install_property (gobject_class,
 183                                    PROP_HANDLE_POSITION,
 184                                    g_param_spec_enum ("handle-position",
 185                                                       P_("Handle position"),
 186                                                       P_("Position of the handle relative to the child widget"),
 187                                                       GTK_TYPE_POSITION_TYPE,
 188                                                       GTK_POS_LEFT,
 189                                                       GTK_PARAM_READWRITE));
 190
 191   g_object_class_install_property (gobject_class,
 192                                    PROP_SNAP_EDGE,
 193                                    g_param_spec_enum ("snap-edge",
 194                                                       P_("Snap edge"),
 195                                                       P_("Side of the handlebox that's lined up with the docking point to dock the handlebox"),
 196                                                       GTK_TYPE_POSITION_TYPE,
 197                                                       GTK_POS_TOP,
 198                                                       GTK_PARAM_READWRITE));
 199
 200   g_object_class_install_property (gobject_class,
 201                                    PROP_SNAP_EDGE_SET,
 202                                    g_param_spec_boolean ("snap-edge-set",
 203                                                          P_("Snap edge set"),
 204                                                          P_("Whether to use the value from the snap_edge property or a value derived from handle_position"),
 205                                                          FALSE,
 206                                                          GTK_PARAM_READWRITE));
 207
 208   object_class->destroy = gtk_handle_box_destroy;
 209
 210   widget_class->map = gtk_handle_box_map;
 211   widget_class->unmap = gtk_handle_box_unmap;
 212   widget_class->realize = gtk_handle_box_realize;
 213   widget_class->unrealize = gtk_handle_box_unrealize;
 214   widget_class->style_set = gtk_handle_box_style_set;
 215   widget_class->size_request = gtk_handle_box_size_request;
 216   widget_class->size_allocate = gtk_handle_box_size_allocate;
 217   widget_class->expose_event = gtk_handle_box_expose;
 218   widget_class->button_press_event = gtk_handle_box_button_changed;
 219   widget_class->delete_event = gtk_handle_box_delete_event;
 220
 221   container_class->add = gtk_handle_box_add;
 222   container_class->remove = gtk_handle_box_remove;
 223
 224   class->child_attached = NULL;
 225   class->child_detached = NULL;
 226
 227   handle_box_signals[SIGNAL_CHILD_ATTACHED] =
 228     g_signal_new (I_("child_attached"),
 229                   G_OBJECT_CLASS_TYPE (gobject_class),
 230                   G_SIGNAL_RUN_FIRST,
 231                   G_STRUCT_OFFSET (GtkHandleBoxClass, child_attached),
 232                   NULL, NULL,
 233                   _gtk_marshal_VOID__OBJECT,
 234                   G_TYPE_NONE, 1,
 235                   GTK_TYPE_WIDGET);
 236   handle_box_signals[SIGNAL_CHILD_DETACHED] =
 237     g_signal_new (I_("child_detached"),
 238                   G_OBJECT_CLASS_TYPE (gobject_class),
 239                   G_SIGNAL_RUN_FIRST,
 240                   G_STRUCT_OFFSET (GtkHandleBoxClass, child_detached),
 241                   NULL, NULL,
 242                   _gtk_marshal_VOID__OBJECT,
 243                   G_TYPE_NONE, 1,
 244                   GTK_TYPE_WIDGET);
 245
 246   g_type_class_add_private (gobject_class, sizeof (GtkHandleBoxPrivate));
 247 }
 248
 249 static GtkHandleBoxPrivate *
 250 gtk_handle_box_get_private (GtkHandleBox *hb)
 251 {
 252   return G_TYPE_INSTANCE_GET_PRIVATE (hb, GTK_TYPE_HANDLE_BOX, GtkHandleBoxPrivate);
 253 }
 254
 255 static void
 256 gtk_handle_box_init (GtkHandleBox *handle_box)
 257 {
 258   GTK_WIDGET_UNSET_FLAGS (handle_box, GTK_NO_WINDOW);
 259
 260   handle_box->bin_window = NULL;
 261   handle_box->float_window = NULL;
 262   handle_box->shadow_type = GTK_SHADOW_OUT;
 263   handle_box->handle_position = GTK_POS_LEFT;
 264   handle_box->float_window_mapped = FALSE;
 265   handle_box->child_detached = FALSE;
 266   handle_box->in_drag = FALSE;
 267   handle_box->shrink_on_detach = TRUE;
 268   handle_box->snap_edge = -1;
 269 }
 270
 271 static void
 272 gtk_handle_box_set_property (GObject         *object,
 273                              guint            prop_id,
 274                              const GValue    *value,
 275                              GParamSpec      *pspec)
 276 {
 277   GtkHandleBox *handle_box = GTK_HANDLE_BOX (object);
 278
 279   switch (prop_id)
 280     {
 281     case PROP_SHADOW:
 282     case PROP_SHADOW_TYPE:
 283       gtk_handle_box_set_shadow_type (handle_box, g_value_get_enum (value));
 284       break;
 285     case PROP_HANDLE_POSITION:
 286       gtk_handle_box_set_handle_position (handle_box, g_value_get_enum (value));
 287       break;
 288     case PROP_SNAP_EDGE:
 289       gtk_handle_box_set_snap_edge (handle_box, g_value_get_enum (value));
 290       break;
 291     case PROP_SNAP_EDGE_SET:
 292       if (!g_value_get_boolean (value))
 293         gtk_handle_box_set_snap_edge (handle_box, (GtkPositionType)-1);
 294       break;
 295     default:
 296       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 297       break;
 298     }
 299 }
 300
 301 static void
 302 gtk_handle_box_get_property (GObject         *object,
 303                              guint            prop_id,
 304                              GValue          *value,
 305                              GParamSpec      *pspec)
 306 {
 307   GtkHandleBox *handle_box = GTK_HANDLE_BOX (object);
 308
 309   switch (prop_id)
 310     {
 311     case PROP_SHADOW:
 312     case PROP_SHADOW_TYPE:
 313       g_value_set_enum (value, handle_box->shadow_type);
 314       break;
 315     case PROP_HANDLE_POSITION:
 316       g_value_set_enum (value, handle_box->handle_position);
 317       break;
 318     case PROP_SNAP_EDGE:
 319       g_value_set_enum (value,
 320                         (handle_box->snap_edge == -1 ?
 321                          GTK_POS_TOP : handle_box->snap_edge));
 322       break;
 323     case PROP_SNAP_EDGE_SET:
 324       g_value_set_boolean (value, handle_box->snap_edge != -1);
 325       break;
 326     default:
 327       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 328       break;
 329     }
 330 }
 331
 332 GtkWidget*
 333 gtk_handle_box_new (void)
 334 {
 335   return g_object_new (GTK_TYPE_HANDLE_BOX, NULL);
 336 }
 337
 338 static void
 339 gtk_handle_box_destroy (GtkObject *object)
 340 {
 341   if (GTK_OBJECT_CLASS (gtk_handle_box_parent_class)->destroy)
 342     (* GTK_OBJECT_CLASS (gtk_handle_box_parent_class)->destroy) (object);
 343 }
 344
 345 static void
 346 gtk_handle_box_map (GtkWidget *widget)
 347 {
 348   GtkBin *bin;
 349   GtkHandleBox *hb;
 350
 351   GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
 352
 353   bin = GTK_BIN (widget);
 354   hb = GTK_HANDLE_BOX (widget);
 355
 356   if (bin->child &&
 357       GTK_WIDGET_VISIBLE (bin->child) &&
 358       !GTK_WIDGET_MAPPED (bin->child))
 359     gtk_widget_map (bin->child);
 360
 361   if (hb->child_detached && !hb->float_window_mapped)
 362     {
 363       gdk_window_show (hb->float_window);
 364       hb->float_window_mapped = TRUE;
 365     }
 366
 367   gdk_window_show (hb->bin_window);
 368   gdk_window_show (widget->window);
 369 }
 370
 371 static void
 372 gtk_handle_box_unmap (GtkWidget *widget)
 373 {
 374   GtkHandleBox *hb;
 375
 376   GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
 377
 378   hb = GTK_HANDLE_BOX (widget);
 379
 380   gdk_window_hide (widget->window);
 381   if (hb->float_window_mapped)
 382     {
 383       gdk_window_hide (hb->float_window);
 384       hb->float_window_mapped = FALSE;
 385     }
 386 }
 387
 388 static void
 389 gtk_handle_box_realize (GtkWidget *widget)
 390 {
 391   GdkWindowAttr attributes;
 392   gint attributes_mask;
 393   GtkHandleBox *hb;
 394
 395   hb = GTK_HANDLE_BOX (widget);
 396
 397   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 398
 399   attributes.x = widget->allocation.x;
 400   attributes.y = widget->allocation.y;
 401   attributes.width = widget->allocation.width;
 402   attributes.height = widget->allocation.height;
 403   attributes.window_type = GDK_WINDOW_CHILD;
 404   attributes.wclass = GDK_INPUT_OUTPUT;
 405   attributes.visual = gtk_widget_get_visual (widget);
 406   attributes.colormap = gtk_widget_get_colormap (widget);
 407   attributes.event_mask = (gtk_widget_get_events (widget)
 408                            | GDK_EXPOSURE_MASK);
 409   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 410   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 411   gdk_window_set_user_data (widget->window, widget);
 412
 413   attributes.x = 0;
 414   attributes.y = 0;
 415   attributes.width = widget->allocation.width;
 416   attributes.height = widget->allocation.height;
 417   attributes.window_type = GDK_WINDOW_CHILD;
 418   attributes.event_mask = (gtk_widget_get_events (widget) |
 419                            GDK_EXPOSURE_MASK |
 420                            GDK_BUTTON1_MOTION_MASK |
 421                            GDK_POINTER_MOTION_HINT_MASK |
 422                            GDK_BUTTON_PRESS_MASK |
 423                             GDK_BUTTON_RELEASE_MASK);
 424   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 425   hb->bin_window = gdk_window_new (widget->window, &attributes, attributes_mask);
 426   gdk_window_set_user_data (hb->bin_window, widget);
 427   if (GTK_BIN (hb)->child)
 428     gtk_widget_set_parent_window (GTK_BIN (hb)->child, hb->bin_window);
 429
 430   attributes.x = 0;
 431   attributes.y = 0;
 432   attributes.width = widget->requisition.width;
 433   attributes.height = widget->requisition.height;
 434   attributes.window_type = GDK_WINDOW_TOPLEVEL;
 435   attributes.wclass = GDK_INPUT_OUTPUT;
 436   attributes.visual = gtk_widget_get_visual (widget);
 437   attributes.colormap = gtk_widget_get_colormap (widget);
 438   attributes.event_mask = (gtk_widget_get_events (widget) |
 439                            GDK_KEY_PRESS_MASK |
 440                            GDK_ENTER_NOTIFY_MASK |
 441                            GDK_LEAVE_NOTIFY_MASK |
 442                            GDK_FOCUS_CHANGE_MASK |
 443                            GDK_STRUCTURE_MASK);
 444   attributes.type_hint = GDK_WINDOW_TYPE_HINT_TOOLBAR;
 445   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP | GDK_WA_TYPE_HINT;
 446   hb->float_window = gdk_window_new (gtk_widget_get_root_window (widget),
 447                                      &attributes, attributes_mask);
 448   gdk_window_set_user_data (hb->float_window, widget);
 449   gdk_window_set_decorations (hb->float_window, 0);
 450   gdk_window_set_type_hint (hb->float_window, GDK_WINDOW_TYPE_HINT_TOOLBAR);
 451
 452   widget->style = gtk_style_attach (widget->style, widget->window);
 453   gtk_style_set_background (widget->style, widget->window, GTK_WIDGET_STATE (hb));
 454   gtk_style_set_background (widget->style, hb->bin_window, GTK_WIDGET_STATE (hb));
 455   gtk_style_set_background (widget->style, hb->float_window, GTK_WIDGET_STATE (hb));
 456   gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
 457 }
 458
 459 static void
 460 gtk_handle_box_unrealize (GtkWidget *widget)
 461 {
 462   GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
 463
 464   gdk_window_set_user_data (hb->bin_window, NULL);
 465   gdk_window_destroy (hb->bin_window);
 466   hb->bin_window = NULL;
 467   gdk_window_set_user_data (hb->float_window, NULL);
 468   gdk_window_destroy (hb->float_window);
 469   hb->float_window = NULL;
 470
 471   if (GTK_WIDGET_CLASS (gtk_handle_box_parent_class)->unrealize)
 472     (* GTK_WIDGET_CLASS (gtk_handle_box_parent_class)->unrealize) (widget);
 473 }
 474
 475 static void
 476 gtk_handle_box_style_set (GtkWidget *widget,
 477                           GtkStyle  *previous_style)
 478 {
 479   GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
 480
 481   if (GTK_WIDGET_REALIZED (widget) &&
 482       !GTK_WIDGET_NO_WINDOW (widget))
 483     {
 484       gtk_style_set_background (widget->style, widget->window,
 485                                 widget->state);
 486       gtk_style_set_background (widget->style, hb->bin_window, widget->state);
 487       gtk_style_set_background (widget->style, hb->float_window, widget->state);
 488     }
 489 }
 490
 491 static int
 492 effective_handle_position (GtkHandleBox *hb)
 493 {
 494   int handle_position;
 495
 496   if (gtk_widget_get_direction (GTK_WIDGET (hb)) == GTK_TEXT_DIR_LTR)
 497     handle_position = hb->handle_position;
 498   else
 499     {
 500       switch (hb->handle_position)
 501         {
 502         case GTK_POS_LEFT:
 503           handle_position = GTK_POS_RIGHT;
 504           break;
 505         case GTK_POS_RIGHT:
 506           handle_position = GTK_POS_LEFT;
 507           break;
 508         default:
 509           handle_position = hb->handle_position;
 510           break;
 511         }
 512     }
 513
 514   return handle_position;
 515 }
 516
 517 static void
 518 gtk_handle_box_size_request (GtkWidget      *widget,
 519                              GtkRequisition *requisition)
 520 {
 521   GtkBin *bin;
 522   GtkHandleBox *hb;
 523   GtkRequisition child_requisition;
 524   gint handle_position;
 525
 526   bin = GTK_BIN (widget);
 527   hb = GTK_HANDLE_BOX (widget);
 528
 529   handle_position = effective_handle_position (hb);
 530
 531   if (handle_position == GTK_POS_LEFT ||
 532       handle_position == GTK_POS_RIGHT)
 533     {
 534       requisition->width = DRAG_HANDLE_SIZE;
 535       requisition->height = 0;
 536     }
 537   else
 538     {
 539       requisition->width = 0;
 540       requisition->height = DRAG_HANDLE_SIZE;
 541     }
 542
 543   /* if our child is not visible, we still request its size, since we
 544    * won't have any useful hint for our size otherwise.
 545    */
 546   if (bin->child)
 547     gtk_widget_size_request (bin->child, &child_requisition);
 548   else
 549     {
 550       child_requisition.width = 0;
 551       child_requisition.height = 0;
 552     }
 553
 554   if (hb->child_detached)
 555     {
 556       /* FIXME: This doesn't work currently */
 557       if (!hb->shrink_on_detach)
 558         {
 559           if (handle_position == GTK_POS_LEFT ||
 560               handle_position == GTK_POS_RIGHT)
 561             requisition->height += child_requisition.height;
 562           else
 563             requisition->width += child_requisition.width;
 564         }
 565       else
 566         {
 567           if (handle_position == GTK_POS_LEFT ||
 568               handle_position == GTK_POS_RIGHT)
 569             requisition->height += widget->style->ythickness;
 570           else
 571             requisition->width += widget->style->xthickness;
 572         }
 573     }
 574   else
 575     {
 576       requisition->width += GTK_CONTAINER (widget)->border_width * 2;
 577       requisition->height += GTK_CONTAINER (widget)->border_width * 2;
 578
 579       if (bin->child)
 580         {
 581           requisition->width += child_requisition.width;
 582           requisition->height += child_requisition.height;
 583         }
 584       else
 585         {
 586           requisition->width += CHILDLESS_SIZE;
 587           requisition->height += CHILDLESS_SIZE;
 588         }
 589     }
 590 }
 591
 592 static void
 593 gtk_handle_box_size_allocate (GtkWidget     *widget,
 594                               GtkAllocation *allocation)
 595 {
 596   GtkBin *bin;
 597   GtkHandleBox *hb;
 598   GtkRequisition child_requisition;
 599   gint handle_position;
 600
 601   bin = GTK_BIN (widget);
 602   hb = GTK_HANDLE_BOX (widget);
 603
 604   handle_position = effective_handle_position (hb);
 605
 606   if (bin->child)
 607     gtk_widget_get_child_requisition (bin->child, &child_requisition);
 608   else
 609     {
 610       child_requisition.width = 0;
 611       child_requisition.height = 0;
 612     }
 613
 614   widget->allocation = *allocation;
 615
 616   if (GTK_WIDGET_REALIZED (hb))
 617     gdk_window_move_resize (widget->window,
 618                             widget->allocation.x,
 619                             widget->allocation.y,
 620                             widget->allocation.width,
 621                             widget->allocation.height);
 622
 623
 624   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 625     {
 626       GtkAllocation child_allocation;
 627       guint border_width;
 628
 629       border_width = GTK_CONTAINER (widget)->border_width;
 630
 631       child_allocation.x = border_width;
 632       child_allocation.y = border_width;
 633       if (handle_position == GTK_POS_LEFT)
 634         child_allocation.x += DRAG_HANDLE_SIZE;
 635       else if (handle_position == GTK_POS_TOP)
 636         child_allocation.y += DRAG_HANDLE_SIZE;
 637
 638       if (hb->child_detached)
 639         {
 640           guint float_width;
 641           guint float_height;
 642
 643           child_allocation.width = child_requisition.width;
 644           child_allocation.height = child_requisition.height;
 645
 646           float_width = child_allocation.width + 2 * border_width;
 647           float_height = child_allocation.height + 2 * border_width;
 648
 649           if (handle_position == GTK_POS_LEFT ||
 650               handle_position == GTK_POS_RIGHT)
 651             float_width += DRAG_HANDLE_SIZE;
 652           else
 653             float_height += DRAG_HANDLE_SIZE;
 654
 655           if (GTK_WIDGET_REALIZED (hb))
 656             {
 657               gdk_window_resize (hb->float_window,
 658                                  float_width,
 659                                  float_height);
 660               gdk_window_move_resize (hb->bin_window,
 661                                       0,
 662                                       0,
 663                                       float_width,
 664                                       float_height);
 665             }
 666         }
 667       else
 668         {
 669           child_allocation.width = MAX (1, (gint)widget->allocation.width - 2 * border_width);
 670           child_allocation.height = MAX (1, (gint)widget->allocation.height - 2 * border_width);
 671
 672           if (handle_position == GTK_POS_LEFT ||
 673               handle_position == GTK_POS_RIGHT)
 674             child_allocation.width -= DRAG_HANDLE_SIZE;
 675           else
 676             child_allocation.height -= DRAG_HANDLE_SIZE;
 677
 678           if (GTK_WIDGET_REALIZED (hb))
 679             gdk_window_move_resize (hb->bin_window,
 680                                     0,
 681                                     0,
 682                                     widget->allocation.width,
 683                                     widget->allocation.height);
 684         }
 685
 686       gtk_widget_size_allocate (bin->child, &child_allocation);
 687     }
 688 }
 689
 690 static void
 691 gtk_handle_box_draw_ghost (GtkHandleBox *hb)
 692 {
 693   GtkWidget *widget;
 694   guint x;
 695   guint y;
 696   guint width;
 697   guint height;
 698   gint handle_position;
 699
 700   widget = GTK_WIDGET (hb);
 701
 702   handle_position = effective_handle_position (hb);
 703   if (handle_position == GTK_POS_LEFT ||
 704       handle_position == GTK_POS_RIGHT)
 705     {
 706       x = handle_position == GTK_POS_LEFT ? 0 : widget->allocation.width - DRAG_HANDLE_SIZE;
 707       y = 0;
 708       width = DRAG_HANDLE_SIZE;
 709       height = widget->allocation.height;
 710     }
 711   else
 712     {
 713       x = 0;
 714       y = handle_position == GTK_POS_TOP ? 0 : widget->allocation.height - DRAG_HANDLE_SIZE;
 715       width = widget->allocation.width;
 716       height = DRAG_HANDLE_SIZE;
 717     }
 718   gtk_paint_shadow (widget->style,
 719                     widget->window,
 720                     GTK_WIDGET_STATE (widget),
 721                     GTK_SHADOW_ETCHED_IN,
 722                     NULL, widget, "handle",
 723                     x,
 724                     y,
 725                     width,
 726                     height);
 727    if (handle_position == GTK_POS_LEFT ||
 728        handle_position == GTK_POS_RIGHT)
 729      gtk_paint_hline (widget->style,
 730                       widget->window,
 731                       GTK_WIDGET_STATE (widget),
 732                       NULL, widget, "handlebox",
 733                       handle_position == GTK_POS_LEFT ? DRAG_HANDLE_SIZE : 0,
 734                       handle_position == GTK_POS_LEFT ? widget->allocation.width : widget->allocation.width - DRAG_HANDLE_SIZE,
 735                       widget->allocation.height / 2);
 736    else
 737      gtk_paint_vline (widget->style,
 738                       widget->window,
 739                       GTK_WIDGET_STATE (widget),
 740                       NULL, widget, "handlebox",
 741                       handle_position == GTK_POS_TOP ? DRAG_HANDLE_SIZE : 0,
 742                       handle_position == GTK_POS_TOP ? widget->allocation.height : widget->allocation.height - DRAG_HANDLE_SIZE,
 743                       widget->allocation.width / 2);
 744 }
 745
 746 static void
 747 draw_textured_frame (GtkWidget *widget, GdkWindow *window, GdkRectangle *rect, GtkShadowType shadow,
 748                      GdkRectangle *clip, GtkOrientation orientation)
 749 {
 750    gtk_paint_handle (widget->style, window, GTK_STATE_NORMAL, shadow,
 751                      clip, widget, "handlebox",
 752                      rect->x, rect->y, rect->width, rect->height,
 753                      orientation);
 754 }
 755
 756 void
 757 gtk_handle_box_set_shadow_type (GtkHandleBox  *handle_box,
 758                                 GtkShadowType  type)
 759 {
 760   g_return_if_fail (GTK_IS_HANDLE_BOX (handle_box));
 761
 762   if ((GtkShadowType) handle_box->shadow_type != type)
 763     {
 764       handle_box->shadow_type = type;
 765       g_object_notify (G_OBJECT (handle_box), "shadow-type");
 766       gtk_widget_queue_resize (GTK_WIDGET (handle_box));
 767     }
 768 }
 769
 770 /**
 771  * gtk_handle_box_get_shadow_type:
 772  * @handle_box: a #GtkHandleBox
 773  *
 774  * Gets the type of shadow drawn around the handle box. See
 775  * gtk_handle_box_set_shadow_type().
 776  *
 777  * Return value: the type of shadow currently drawn around the handle box.
 778  **/
 779 GtkShadowType
 780 gtk_handle_box_get_shadow_type (GtkHandleBox *handle_box)
 781 {
 782   g_return_val_if_fail (GTK_IS_HANDLE_BOX (handle_box), GTK_SHADOW_ETCHED_OUT);
 783
 784   return handle_box->shadow_type;
 785 }
 786
 787 void
 788 gtk_handle_box_set_handle_position  (GtkHandleBox    *handle_box,
 789                                      GtkPositionType  position)
 790 {
 791   g_return_if_fail (GTK_IS_HANDLE_BOX (handle_box));
 792
 793   if ((GtkPositionType) handle_box->handle_position != position)
 794     {
 795       handle_box->handle_position = position;
 796       g_object_notify (G_OBJECT (handle_box), "handle-position");
 797       gtk_widget_queue_resize (GTK_WIDGET (handle_box));
 798     }
 799 }
 800
 801 /**
 802  * gtk_handle_box_get_handle_position:
 803  * @handle_box: a #GtkHandleBox
 804  *
 805  * Gets the handle position of the handle box. See
 806  * gtk_handle_box_set_handle_position().
 807  *
 808  * Return value: the current handle position.
 809  **/
 810 GtkPositionType
 811 gtk_handle_box_get_handle_position (GtkHandleBox *handle_box)
 812 {
 813   g_return_val_if_fail (GTK_IS_HANDLE_BOX (handle_box), GTK_POS_LEFT);
 814
 815   return handle_box->handle_position;
 816 }
 817
 818 void
 819 gtk_handle_box_set_snap_edge        (GtkHandleBox    *handle_box,
 820                                      GtkPositionType  edge)
 821 {
 822   g_return_if_fail (GTK_IS_HANDLE_BOX (handle_box));
 823
 824   if (handle_box->snap_edge != edge)
 825     {
 826       handle_box->snap_edge = edge;
 827
 828       g_object_freeze_notify (G_OBJECT (handle_box));
 829       g_object_notify (G_OBJECT (handle_box), "snap-edge");
 830       g_object_notify (G_OBJECT (handle_box), "snap-edge-set");
 831       g_object_thaw_notify (G_OBJECT (handle_box));
 832     }
 833 }
 834
 835 /**
 836  * gtk_handle_box_get_snap_edge:
 837  * @handle_box: a #GtkHandleBox
 838  *
 839  * Gets the edge used for determining reattachment of the handle box. See
 840  * gtk_handle_box_set_snap_edge().
 841  *
 842  * Return value: the edge used for determining reattachment, or (GtkPositionType)-1 if this
 843  *               is determined (as per default) from the handle position.
 844  **/
 845 GtkPositionType
 846 gtk_handle_box_get_snap_edge (GtkHandleBox *handle_box)
 847 {
 848   g_return_val_if_fail (GTK_IS_HANDLE_BOX (handle_box), (GtkPositionType)-1);
 849
 850   return handle_box->snap_edge;
 851 }
 852
 853 static void
 854 gtk_handle_box_paint (GtkWidget      *widget,
 855
 856     GdkEventExpose *event,
 857                       GdkRectangle   *area)
 858 {
 859   GtkBin *bin;
 860   GtkHandleBox *hb;
 861   gint width, height;
 862   GdkRectangle rect;
 863   GdkRectangle dest;
 864   gint handle_position;
 865   GtkOrientation handle_orientation;
 866
 867   bin = GTK_BIN (widget);
 868   hb = GTK_HANDLE_BOX (widget);
 869
 870   handle_position = effective_handle_position (hb);
 871
 872   gdk_drawable_get_size (hb->bin_window, &width, &height);
 873
 874   if (!event)
 875     gtk_paint_box (widget->style,
 876                    hb->bin_window,
 877                    GTK_WIDGET_STATE (widget),
 878                    hb->shadow_type,
 879                    area, widget, "handlebox_bin",
 880                    0, 0, -1, -1);
 881   else
 882    gtk_paint_box (widget->style,
 883                   hb->bin_window,
 884                   GTK_WIDGET_STATE (widget),
 885                   hb->shadow_type,
 886                   &event->area, widget, "handlebox_bin",
 887                   0, 0, -1, -1);
 888
 889 /* We currently draw the handle _above_ the relief of the handlebox.
 890  * it could also be drawn on the same level...
 891
 892                  hb->handle_position == GTK_POS_LEFT ? DRAG_HANDLE_SIZE : 0,
 893                  hb->handle_position == GTK_POS_TOP ? DRAG_HANDLE_SIZE : 0,
 894                  width,
 895                  height);*/
 896
 897   switch (handle_position)
 898     {
 899     case GTK_POS_LEFT:
 900       rect.x = 0;
 901       rect.y = 0;
 902       rect.width = DRAG_HANDLE_SIZE;
 903       rect.height = height;
 904       handle_orientation = GTK_ORIENTATION_VERTICAL;
 905       break;
 906     case GTK_POS_RIGHT:
 907       rect.x = width - DRAG_HANDLE_SIZE;
 908       rect.y = 0;
 909       rect.width = DRAG_HANDLE_SIZE;
 910       rect.height = height;
 911       handle_orientation = GTK_ORIENTATION_VERTICAL;
 912       break;
 913     case GTK_POS_TOP:
 914       rect.x = 0;
 915       rect.y = 0;
 916       rect.width = width;
 917       rect.height = DRAG_HANDLE_SIZE;
 918       handle_orientation = GTK_ORIENTATION_HORIZONTAL;
 919       break;
 920     case GTK_POS_BOTTOM:
 921       rect.x = 0;
 922       rect.y = height - DRAG_HANDLE_SIZE;
 923       rect.width = width;
 924       rect.height = DRAG_HANDLE_SIZE;
 925       handle_orientation = GTK_ORIENTATION_HORIZONTAL;
 926       break;
 927     default:
 928       g_assert_not_reached ();
 929       break;
 930     }
 931
 932   if (gdk_rectangle_intersect (event ? &event->area : area, &rect, &dest))
 933     draw_textured_frame (widget, hb->bin_window, &rect,
 934                          GTK_SHADOW_OUT,
 935                          event ? &event->area : area,
 936                          handle_orientation);
 937
 938   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 939     (* GTK_WIDGET_CLASS (gtk_handle_box_parent_class)->expose_event) (widget, event);
 940 }
 941
 942 static gint
 943 gtk_handle_box_expose (GtkWidget      *widget,
 944                        GdkEventExpose *event)
 945 {
 946   GtkHandleBox *hb;
 947
 948   if (GTK_WIDGET_DRAWABLE (widget))
 949     {
 950       hb = GTK_HANDLE_BOX (widget);
 951
 952       if (event->window == widget->window)
 953         {
 954           if (hb->child_detached)
 955             gtk_handle_box_draw_ghost (hb);
 956         }
 957       else
 958         gtk_handle_box_paint (widget, event, NULL);
 959     }
 960
 961   return FALSE;
 962 }
 963
 964 static GtkWidget *
 965 gtk_handle_box_get_invisible (void)
 966 {
 967   static GtkWidget *handle_box_invisible = NULL;
 968
 969   if (!handle_box_invisible)
 970     {
 971       handle_box_invisible = gtk_invisible_new ();
 972       gtk_widget_show (handle_box_invisible);
 973     }
 974
 975   return handle_box_invisible;
 976 }
 977
 978 static gboolean
 979 gtk_handle_box_grab_event (GtkWidget    *widget,
 980                            GdkEvent     *event,
 981                            GtkHandleBox *hb)
 982 {
 983   switch (event->type)
 984     {
 985     case GDK_BUTTON_RELEASE:
 986       if (hb->in_drag)          /* sanity check */
 987         {
 988           gtk_handle_box_end_drag (hb, event->button.time);
 989           return TRUE;
 990         }
 991       break;
 992
 993     case GDK_MOTION_NOTIFY:
 994       return gtk_handle_box_motion (GTK_WIDGET (hb), (GdkEventMotion *)event);
 995       break;
 996
 997     default:
 998       break;
 999     }
1000
1001   return FALSE;
1002 }
1003
1004 static gint
1005 gtk_handle_box_button_changed (GtkWidget      *widget,
1006                                GdkEventButton *event)
1007 {
1008   GtkHandleBox *hb;
1009   gboolean event_handled;
1010   GdkCursor *fleur;
1011   gint handle_position;
1012
1013   hb = GTK_HANDLE_BOX (widget);
1014
1015   handle_position = effective_handle_position (hb);
1016
1017   event_handled = FALSE;
1018   if ((event->button == 1) &&
1019       (event->type == GDK_BUTTON_PRESS || event->type == GDK_2BUTTON_PRESS))
1020     {
1021       GtkWidget *child;
1022       gboolean in_handle;
1023
1024       if (event->window != hb->bin_window)
1025         return FALSE;
1026
1027       child = GTK_BIN (hb)->child;
1028
1029       if (child)
1030         {
1031           switch (handle_position)
1032             {
1033             case GTK_POS_LEFT:
1034               in_handle = event->x < DRAG_HANDLE_SIZE;
1035               break;
1036             case GTK_POS_TOP:
1037               in_handle = event->y < DRAG_HANDLE_SIZE;
1038               break;
1039             case GTK_POS_RIGHT:
1040               in_handle = event->x > 2 * GTK_CONTAINER (hb)->border_width + child->allocation.width;
1041               break;
1042             case GTK_POS_BOTTOM:
1043               in_handle = event->y > 2 * GTK_CONTAINER (hb)->border_width + child->allocation.height;
1044               break;
1045             default:
1046               in_handle = FALSE;
1047               break;
1048             }
1049         }
1050       else
1051         {
1052           in_handle = FALSE;
1053           event_handled = TRUE;
1054         }
1055
1056       if (in_handle)
1057         {
1058           if (event->type == GDK_BUTTON_PRESS) /* Start a drag */
1059             {
1060               GtkHandleBoxPrivate *private = gtk_handle_box_get_private (hb);
1061               GtkWidget *invisible = gtk_handle_box_get_invisible ();
1062               gint desk_x, desk_y;
1063               gint root_x, root_y;
1064               gint width, height;
1065
1066               gdk_window_get_deskrelative_origin (hb->bin_window, &desk_x, &desk_y);
1067               gdk_window_get_origin (hb->bin_window, &root_x, &root_y);
1068               gdk_drawable_get_size (hb->bin_window, &width, &height);
1069
1070               private->orig_x = event->x_root;
1071               private->orig_y = event->y_root;
1072
1073               hb->float_allocation.x = root_x - event->x_root;
1074               hb->float_allocation.y = root_y - event->y_root;
1075               hb->float_allocation.width = width;
1076               hb->float_allocation.height = height;
1077
1078               hb->deskoff_x = desk_x - root_x;
1079               hb->deskoff_y = desk_y - root_y;
1080
1081               if (gdk_window_is_viewable (widget->window))
1082                 {
1083                   gdk_window_get_origin (widget->window, &root_x, &root_y);
1084                   gdk_drawable_get_size (widget->window, &width, &height);
1085
1086                   hb->attach_allocation.x = root_x;
1087                   hb->attach_allocation.y = root_y;
1088                   hb->attach_allocation.width = width;
1089                   hb->attach_allocation.height = height;
1090                 }
1091               else
1092                 {
1093                   hb->attach_allocation.x = -1;
1094                   hb->attach_allocation.y = -1;
1095                   hb->attach_allocation.width = 0;
1096                   hb->attach_allocation.height = 0;
1097                 }
1098               hb->in_drag = TRUE;
1099               fleur = gdk_cursor_new_for_display (gtk_widget_get_display (widget),
1100                                                   GDK_FLEUR);
1101               if (gdk_pointer_grab (invisible->window,
1102                                     FALSE,
1103                                     (GDK_BUTTON1_MOTION_MASK |
1104                                      GDK_POINTER_MOTION_HINT_MASK |
1105                                      GDK_BUTTON_RELEASE_MASK),
1106                                     NULL,
1107                                     fleur,
1108                                     event->time) != 0)
1109                 {
1110                   hb->in_drag = FALSE;
1111                 }
1112               else
1113                 {
1114                   gtk_grab_add (invisible);
1115                   g_signal_connect (invisible, "event",
1116                                     G_CALLBACK (gtk_handle_box_grab_event), hb);
1117                 }
1118
1119               gdk_cursor_unref (fleur);
1120               event_handled = TRUE;
1121             }
1122           else if (hb->child_detached) /* Double click */
1123             {
1124               gtk_handle_box_reattach (hb);
1125             }
1126         }
1127     }
1128
1129   return event_handled;
1130 }
1131
1132 static gint
1133 gtk_handle_box_motion (GtkWidget      *widget,
1134                        GdkEventMotion *event)
1135 {
1136   GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
1137   gint new_x, new_y;
1138   gint snap_edge;
1139   gboolean is_snapped = FALSE;
1140   gint handle_position;
1141   GdkGeometry geometry;
1142   GdkScreen *screen, *pointer_screen;
1143
1144   if (!hb->in_drag)
1145     return FALSE;
1146   handle_position = effective_handle_position (hb);
1147
1148   /* Calculate the attachment point on the float, if the float
1149    * were detached
1150    */
1151   new_x = 0;
1152   new_y = 0;
1153   screen = gtk_widget_get_screen (widget);
1154   gdk_display_get_pointer (gdk_screen_get_display (screen),
1155                            &pointer_screen,
1156                            &new_x, &new_y, NULL);
1157   if (pointer_screen != screen)
1158     {
1159       GtkHandleBoxPrivate *private = gtk_handle_box_get_private (hb);
1160
1161       new_x = private->orig_x;
1162       new_y = private->orig_y;
1163     }
1164
1165   new_x += hb->float_allocation.x;
1166   new_y += hb->float_allocation.y;
1167
1168   snap_edge = hb->snap_edge;
1169   if (snap_edge == -1)
1170     snap_edge = (handle_position == GTK_POS_LEFT ||
1171                  handle_position == GTK_POS_RIGHT) ?
1172       GTK_POS_TOP : GTK_POS_LEFT;
1173
1174   if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
1175     switch (snap_edge)
1176       {
1177       case GTK_POS_LEFT:
1178         snap_edge = GTK_POS_RIGHT;
1179         break;
1180       case GTK_POS_RIGHT:
1181         snap_edge = GTK_POS_LEFT;
1182         break;
1183       default:
1184         break;
1185       }
1186
1187   /* First, check if the snapped edge is aligned
1188    */
1189   switch (snap_edge)
1190     {
1191     case GTK_POS_TOP:
1192       is_snapped = abs (hb->attach_allocation.y - new_y) < TOLERANCE;
1193       break;
1194     case GTK_POS_BOTTOM:
1195       is_snapped = abs (hb->attach_allocation.y + (gint)hb->attach_allocation.height -
1196                         new_y - (gint)hb->float_allocation.height) < TOLERANCE;
1197       break;
1198     case GTK_POS_LEFT:
1199       is_snapped = abs (hb->attach_allocation.x - new_x) < TOLERANCE;
1200       break;
1201     case GTK_POS_RIGHT:
1202       is_snapped = abs (hb->attach_allocation.x + (gint)hb->attach_allocation.width -
1203                         new_x - (gint)hb->float_allocation.width) < TOLERANCE;
1204       break;
1205     }
1206
1207   /* Next, check if coordinates in the other direction are sufficiently
1208    * aligned
1209    */
1210   if (is_snapped)
1211     {
1212       gint float_pos1 = 0;      /* Initialize to suppress warnings */
1213       gint float_pos2 = 0;
1214       gint attach_pos1 = 0;
1215       gint attach_pos2 = 0;
1216
1217       switch (snap_edge)
1218         {
1219         case GTK_POS_TOP:
1220         case GTK_POS_BOTTOM:
1221           attach_pos1 = hb->attach_allocation.x;
1222           attach_pos2 = hb->attach_allocation.x + hb->attach_allocation.width;
1223           float_pos1 = new_x;
1224           float_pos2 = new_x + hb->float_allocation.width;
1225           break;
1226         case GTK_POS_LEFT:
1227         case GTK_POS_RIGHT:
1228           attach_pos1 = hb->attach_allocation.y;
1229           attach_pos2 = hb->attach_allocation.y + hb->attach_allocation.height;
1230           float_pos1 = new_y;
1231           float_pos2 = new_y + hb->float_allocation.height;
1232           break;
1233         }
1234
1235       is_snapped = ((attach_pos1 - TOLERANCE < float_pos1) &&
1236                     (attach_pos2 + TOLERANCE > float_pos2)) ||
1237                    ((float_pos1 - TOLERANCE < attach_pos1) &&
1238                     (float_pos2 + TOLERANCE > attach_pos2));
1239     }
1240
1241   if (is_snapped)
1242     {
1243       if (hb->child_detached)
1244         {
1245           hb->child_detached = FALSE;
1246           gdk_window_hide (hb->float_window);
1247           gdk_window_reparent (hb->bin_window, widget->window, 0, 0);
1248           hb->float_window_mapped = FALSE;
1249           g_signal_emit (hb,
1250                          handle_box_signals[SIGNAL_CHILD_ATTACHED],
1251                          0,
1252                          GTK_BIN (hb)->child);
1253
1254           gtk_widget_queue_resize (widget);
1255         }
1256     }
1257   else
1258     {
1259       gint width, height;
1260
1261       gdk_drawable_get_size (hb->float_window, &width, &height);
1262       new_x += hb->deskoff_x;
1263       new_y += hb->deskoff_y;
1264
1265       switch (handle_position)
1266         {
1267         case GTK_POS_LEFT:
1268           new_y += ((gint)hb->float_allocation.height - height) / 2;
1269           break;
1270         case GTK_POS_RIGHT:
1271           new_x += (gint)hb->float_allocation.width - width;
1272           new_y += ((gint)hb->float_allocation.height - height) / 2;
1273           break;
1274         case GTK_POS_TOP:
1275           new_x += ((gint)hb->float_allocation.width - width) / 2;
1276           break;
1277         case GTK_POS_BOTTOM:
1278           new_x += ((gint)hb->float_allocation.width - width) / 2;
1279           new_y += (gint)hb->float_allocation.height - height;
1280           break;
1281         }
1282
1283       if (hb->child_detached)
1284         {
1285           gdk_window_move (hb->float_window, new_x, new_y);
1286           gdk_window_raise (hb->float_window);
1287         }
1288       else
1289         {
1290           gint width;
1291           gint height;
1292           GtkRequisition child_requisition;
1293
1294           hb->child_detached = TRUE;
1295
1296           if (GTK_BIN (hb)->child)
1297             gtk_widget_get_child_requisition (GTK_BIN (hb)->child, &child_requisition);
1298           else
1299             {
1300               child_requisition.width = 0;
1301               child_requisition.height = 0;
1302             }
1303
1304           width = child_requisition.width + 2 * GTK_CONTAINER (hb)->border_width;
1305           height = child_requisition.height + 2 * GTK_CONTAINER (hb)->border_width;
1306
1307           if (handle_position == GTK_POS_LEFT || handle_position == GTK_POS_RIGHT)
1308             width += DRAG_HANDLE_SIZE;
1309           else
1310             height += DRAG_HANDLE_SIZE;
1311
1312           gdk_window_move_resize (hb->float_window, new_x, new_y, width, height);
1313           gdk_window_reparent (hb->bin_window, hb->float_window, 0, 0);
1314           gdk_window_set_geometry_hints (hb->float_window, &geometry, GDK_HINT_POS);
1315           gdk_window_show (hb->float_window);
1316           hb->float_window_mapped = TRUE;
1317 #if     0
1318           /* this extra move is necessary if we use decorations, or our
1319            * window manager insists on decorations.
1320            */
1321           gdk_display_sync (gtk_widget_get_display (widget));
1322           gdk_window_move (hb->float_window, new_x, new_y);
1323           gdk_display_sync (gtk_widget_get_display (widget));
1324 #endif  /* 0 */
1325           g_signal_emit (hb,
1326                          handle_box_signals[SIGNAL_CHILD_DETACHED],
1327                          0,
1328                          GTK_BIN (hb)->child);
1329           gtk_handle_box_draw_ghost (hb);
1330
1331           gtk_widget_queue_resize (widget);
1332         }
1333     }
1334
1335   return TRUE;
1336 }
1337
1338 static void
1339 gtk_handle_box_add (GtkContainer *container,
1340                     GtkWidget    *widget)
1341 {
1342   gtk_widget_set_parent_window (widget, GTK_HANDLE_BOX (container)->bin_window);
1343   GTK_CONTAINER_CLASS (gtk_handle_box_parent_class)->add (container, widget);
1344 }
1345
1346 static void
1347 gtk_handle_box_remove (GtkContainer *container,
1348                        GtkWidget    *widget)
1349 {
1350   GTK_CONTAINER_CLASS (gtk_handle_box_parent_class)->remove (container, widget);
1351
1352   gtk_handle_box_reattach (GTK_HANDLE_BOX (container));
1353 }
1354
1355 static gint
1356 gtk_handle_box_delete_event (GtkWidget *widget,
1357                              GdkEventAny  *event)
1358 {
1359   GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
1360
1361   if (event->window == hb->float_window)
1362     {
1363       gtk_handle_box_reattach (hb);
1364
1365       return TRUE;
1366     }
1367
1368   return FALSE;
1369 }
1370
1371 static void
1372 gtk_handle_box_reattach (GtkHandleBox *hb)
1373 {
1374   GtkWidget *widget = GTK_WIDGET (hb);
1375
1376   if (hb->child_detached)
1377     {
1378       hb->child_detached = FALSE;
1379       if (GTK_WIDGET_REALIZED (hb))
1380         {
1381           gdk_window_hide (hb->float_window);
1382           gdk_window_reparent (hb->bin_window, widget->window, 0, 0);
1383
1384           if (GTK_BIN (hb)->child)
1385             g_signal_emit (hb,
1386                            handle_box_signals[SIGNAL_CHILD_ATTACHED],
1387                            0,
1388                            GTK_BIN (hb)->child);
1389
1390         }
1391       hb->float_window_mapped = FALSE;
1392     }
1393   if (hb->in_drag)
1394     gtk_handle_box_end_drag (hb, GDK_CURRENT_TIME);
1395
1396   gtk_widget_queue_resize (GTK_WIDGET (hb));
1397 }
1398
1399 static void
1400 gtk_handle_box_end_drag (GtkHandleBox *hb,
1401                          guint32       time)
1402 {
1403   GtkWidget *invisible = gtk_handle_box_get_invisible ();
1404
1405   hb->in_drag = FALSE;
1406
1407   gtk_grab_remove (invisible);
1408   gdk_pointer_ungrab (time);
1409   g_signal_handlers_disconnect_by_func (invisible,
1410                                         G_CALLBACK (gtk_handle_box_grab_event),
1411                                         hb);
1412 }
1413
1414 #define __GTK_HANDLE_BOX_C__
1415 #include "gtkaliasdef.c"