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   PROP_CHILD_DETACHED
  55 };
  56
  57 #define DRAG_HANDLE_SIZE 10
  58 #define CHILDLESS_SIZE  25
  59 #define GHOST_HEIGHT 3
  60 #define TOLERANCE 5
  61
  62 enum {
  63   SIGNAL_CHILD_ATTACHED,
  64   SIGNAL_CHILD_DETACHED,
  65   SIGNAL_LAST
  66 };
  67
  68 /* The algorithm for docking and redocking implemented here
  69  * has a couple of nice properties:
  70  *
  71  * 1) During a single drag, docking always occurs at the
  72  *    the same cursor position. This means that the users
  73  *    motions are reversible, and that you won't
  74  *    undock/dock oscillations.
  75  *
  76  * 2) Docking generally occurs at user-visible features.
  77  *    The user, once they figure out to redock, will
  78  *    have useful information about doing it again in
  79  *    the future.
  80  *
  81  * Please try to preserve these properties if you
  82  * change the algorithm. (And the current algorithm
  83  * is far from ideal). Briefly, the current algorithm
  84  * for deciding whether the handlebox is docked or not:
  85  *
  86  * 1) The decision is done by comparing two rectangles - the
  87  *    allocation if the widget at the start of the drag,
  88  *    and the boundary of hb->bin_window at the start of
  89  *    of the drag offset by the distance that the cursor
  90  *    has moved.
  91  *
  92  * 2) These rectangles must have one edge, the "snap_edge"
  93  *    of the handlebox, aligned within TOLERANCE.
  94  *
  95  * 3) On the other dimension, the extents of one rectangle
  96  *    must be contained in the extents of the other,
  97  *    extended by tolerance. That is, either we can have:
  98  *
  99  * <-TOLERANCE-|--------bin_window--------------|-TOLERANCE->
 100  *         <--------float_window-------------------->
 101  *
 102  * or we can have:
 103  *
 104  * <-TOLERANCE-|------float_window--------------|-TOLERANCE->
 105  *          <--------bin_window-------------------->
 106  */
 107
 108 static void     gtk_handle_box_set_property  (GObject        *object,
 109                                               guint           param_id,
 110                                               const GValue   *value,
 111                                               GParamSpec     *pspec);
 112 static void     gtk_handle_box_get_property  (GObject        *object,
 113                                               guint           param_id,
 114                                               GValue         *value,
 115                                               GParamSpec     *pspec);
 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 gboolean gtk_handle_box_expose        (GtkWidget      *widget,
 135                                               GdkEventExpose *event);
 136 static gboolean gtk_handle_box_button_press  (GtkWidget      *widget,
 137                                               GdkEventButton *event);
 138 static gboolean gtk_handle_box_motion        (GtkWidget      *widget,
 139                                               GdkEventMotion *event);
 140 static gboolean 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   GtkWidgetClass *widget_class;
 155   GtkContainerClass *container_class;
 156
 157   gobject_class = (GObjectClass *) class;
 158   widget_class = (GtkWidgetClass *) class;
 159   container_class = (GtkContainerClass *) class;
 160
 161   gobject_class->set_property = gtk_handle_box_set_property;
 162   gobject_class->get_property = gtk_handle_box_get_property;
 163
 164   g_object_class_install_property (gobject_class,
 165                                    PROP_SHADOW,
 166                                    g_param_spec_enum ("shadow", NULL,
 167                                                       P_("Deprecated property, use shadow_type instead"),
 168                                                       GTK_TYPE_SHADOW_TYPE,
 169                                                       GTK_SHADOW_OUT,
 170                                                       GTK_PARAM_READWRITE));
 171   g_object_class_install_property (gobject_class,
 172                                    PROP_SHADOW_TYPE,
 173                                    g_param_spec_enum ("shadow-type",
 174                                                       P_("Shadow type"),
 175                                                       P_("Appearance of the shadow that surrounds the container"),
 176                                                       GTK_TYPE_SHADOW_TYPE,
 177                                                       GTK_SHADOW_OUT,
 178                                                       GTK_PARAM_READWRITE));
 179
 180   g_object_class_install_property (gobject_class,
 181                                    PROP_HANDLE_POSITION,
 182                                    g_param_spec_enum ("handle-position",
 183                                                       P_("Handle position"),
 184                                                       P_("Position of the handle relative to the child widget"),
 185                                                       GTK_TYPE_POSITION_TYPE,
 186                                                       GTK_POS_LEFT,
 187                                                       GTK_PARAM_READWRITE));
 188
 189   g_object_class_install_property (gobject_class,
 190                                    PROP_SNAP_EDGE,
 191                                    g_param_spec_enum ("snap-edge",
 192                                                       P_("Snap edge"),
 193                                                       P_("Side of the handlebox that's lined up with the docking point to dock the handlebox"),
 194                                                       GTK_TYPE_POSITION_TYPE,
 195                                                       GTK_POS_TOP,
 196                                                       GTK_PARAM_READWRITE));
 197
 198   g_object_class_install_property (gobject_class,
 199                                    PROP_SNAP_EDGE_SET,
 200                                    g_param_spec_boolean ("snap-edge-set",
 201                                                          P_("Snap edge set"),
 202                                                          P_("Whether to use the value from the snap_edge property or a value derived from handle_position"),
 203                                                          FALSE,
 204                                                          GTK_PARAM_READWRITE));
 205
 206   g_object_class_install_property (gobject_class,
 207                                    PROP_CHILD_DETACHED,
 208                                    g_param_spec_boolean ("child-detached",
 209                                                          P_("Child Detached"),
 210                                                          P_("A boolean value indicating whether the handlebox's child is attached or detached."),
 211                                                          FALSE,
 212                                                          GTK_PARAM_READABLE));
 213
 214   widget_class->map = gtk_handle_box_map;
 215   widget_class->unmap = gtk_handle_box_unmap;
 216   widget_class->realize = gtk_handle_box_realize;
 217   widget_class->unrealize = gtk_handle_box_unrealize;
 218   widget_class->style_set = gtk_handle_box_style_set;
 219   widget_class->size_request = gtk_handle_box_size_request;
 220   widget_class->size_allocate = gtk_handle_box_size_allocate;
 221   widget_class->expose_event = gtk_handle_box_expose;
 222   widget_class->button_press_event = gtk_handle_box_button_press;
 223   widget_class->delete_event = gtk_handle_box_delete_event;
 224
 225   container_class->add = gtk_handle_box_add;
 226   container_class->remove = gtk_handle_box_remove;
 227
 228   class->child_attached = NULL;
 229   class->child_detached = NULL;
 230
 231   handle_box_signals[SIGNAL_CHILD_ATTACHED] =
 232     g_signal_new (I_("child-attached"),
 233                   G_OBJECT_CLASS_TYPE (gobject_class),
 234                   G_SIGNAL_RUN_FIRST,
 235                   G_STRUCT_OFFSET (GtkHandleBoxClass, child_attached),
 236                   NULL, NULL,
 237                   _gtk_marshal_VOID__OBJECT,
 238                   G_TYPE_NONE, 1,
 239                   GTK_TYPE_WIDGET);
 240   handle_box_signals[SIGNAL_CHILD_DETACHED] =
 241     g_signal_new (I_("child-detached"),
 242                   G_OBJECT_CLASS_TYPE (gobject_class),
 243                   G_SIGNAL_RUN_FIRST,
 244                   G_STRUCT_OFFSET (GtkHandleBoxClass, child_detached),
 245                   NULL, NULL,
 246                   _gtk_marshal_VOID__OBJECT,
 247                   G_TYPE_NONE, 1,
 248                   GTK_TYPE_WIDGET);
 249
 250   g_type_class_add_private (gobject_class, sizeof (GtkHandleBoxPrivate));
 251 }
 252
 253 static GtkHandleBoxPrivate *
 254 gtk_handle_box_get_private (GtkHandleBox *hb)
 255 {
 256   return G_TYPE_INSTANCE_GET_PRIVATE (hb, GTK_TYPE_HANDLE_BOX, GtkHandleBoxPrivate);
 257 }
 258
 259 static void
 260 gtk_handle_box_init (GtkHandleBox *handle_box)
 261 {
 262   GTK_WIDGET_UNSET_FLAGS (handle_box, GTK_NO_WINDOW);
 263
 264   handle_box->bin_window = NULL;
 265   handle_box->float_window = NULL;
 266   handle_box->shadow_type = GTK_SHADOW_OUT;
 267   handle_box->handle_position = GTK_POS_LEFT;
 268   handle_box->float_window_mapped = FALSE;
 269   handle_box->child_detached = FALSE;
 270   handle_box->in_drag = FALSE;
 271   handle_box->shrink_on_detach = TRUE;
 272   handle_box->snap_edge = -1;
 273 }
 274
 275 static void
 276 gtk_handle_box_set_property (GObject         *object,
 277                              guint            prop_id,
 278                              const GValue    *value,
 279                              GParamSpec      *pspec)
 280 {
 281   GtkHandleBox *handle_box = GTK_HANDLE_BOX (object);
 282
 283   switch (prop_id)
 284     {
 285     case PROP_SHADOW:
 286     case PROP_SHADOW_TYPE:
 287       gtk_handle_box_set_shadow_type (handle_box, g_value_get_enum (value));
 288       break;
 289     case PROP_HANDLE_POSITION:
 290       gtk_handle_box_set_handle_position (handle_box, g_value_get_enum (value));
 291       break;
 292     case PROP_SNAP_EDGE:
 293       gtk_handle_box_set_snap_edge (handle_box, g_value_get_enum (value));
 294       break;
 295     case PROP_SNAP_EDGE_SET:
 296       if (!g_value_get_boolean (value))
 297         gtk_handle_box_set_snap_edge (handle_box, (GtkPositionType)-1);
 298       break;
 299     default:
 300       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 301       break;
 302     }
 303 }
 304
 305 static void
 306 gtk_handle_box_get_property (GObject         *object,
 307                              guint            prop_id,
 308                              GValue          *value,
 309                              GParamSpec      *pspec)
 310 {
 311   GtkHandleBox *handle_box = GTK_HANDLE_BOX (object);
 312
 313   switch (prop_id)
 314     {
 315     case PROP_SHADOW:
 316     case PROP_SHADOW_TYPE:
 317       g_value_set_enum (value, handle_box->shadow_type);
 318       break;
 319     case PROP_HANDLE_POSITION:
 320       g_value_set_enum (value, handle_box->handle_position);
 321       break;
 322     case PROP_SNAP_EDGE:
 323       g_value_set_enum (value,
 324                         (handle_box->snap_edge == -1 ?
 325                          GTK_POS_TOP : handle_box->snap_edge));
 326       break;
 327     case PROP_SNAP_EDGE_SET:
 328       g_value_set_boolean (value, handle_box->snap_edge != -1);
 329       break;
 330     case PROP_CHILD_DETACHED:
 331       g_value_set_boolean (value, handle_box->child_detached);
 332       break;
 333     default:
 334       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 335       break;
 336     }
 337 }
 338
 339 GtkWidget*
 340 gtk_handle_box_new (void)
 341 {
 342   return g_object_new (GTK_TYPE_HANDLE_BOX, NULL);
 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_get_visible (bin->child) &&
 358       !gtk_widget_get_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   GTK_WIDGET_CLASS (gtk_handle_box_parent_class)->unrealize (widget);
 472 }
 473
 474 static void
 475 gtk_handle_box_style_set (GtkWidget *widget,
 476                           GtkStyle  *previous_style)
 477 {
 478   GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
 479
 480   if (GTK_WIDGET_REALIZED (widget) &&
 481       gtk_widget_get_has_window (widget))
 482     {
 483       gtk_style_set_background (widget->style, widget->window,
 484                                 widget->state);
 485       gtk_style_set_background (widget->style, hb->bin_window, widget->state);
 486       gtk_style_set_background (widget->style, hb->float_window, widget->state);
 487     }
 488 }
 489
 490 static int
 491 effective_handle_position (GtkHandleBox *hb)
 492 {
 493   int handle_position;
 494
 495   if (gtk_widget_get_direction (GTK_WIDGET (hb)) == GTK_TEXT_DIR_LTR)
 496     handle_position = hb->handle_position;
 497   else
 498     {
 499       switch (hb->handle_position)
 500         {
 501         case GTK_POS_LEFT:
 502           handle_position = GTK_POS_RIGHT;
 503           break;
 504         case GTK_POS_RIGHT:
 505           handle_position = GTK_POS_LEFT;
 506           break;
 507         default:
 508           handle_position = hb->handle_position;
 509           break;
 510         }
 511     }
 512
 513   return handle_position;
 514 }
 515
 516 static void
 517 gtk_handle_box_size_request (GtkWidget      *widget,
 518                              GtkRequisition *requisition)
 519 {
 520   GtkBin *bin;
 521   GtkHandleBox *hb;
 522   GtkRequisition child_requisition;
 523   gint handle_position;
 524
 525   bin = GTK_BIN (widget);
 526   hb = GTK_HANDLE_BOX (widget);
 527
 528   handle_position = effective_handle_position (hb);
 529
 530   if (handle_position == GTK_POS_LEFT ||
 531       handle_position == GTK_POS_RIGHT)
 532     {
 533       requisition->width = DRAG_HANDLE_SIZE;
 534       requisition->height = 0;
 535     }
 536   else
 537     {
 538       requisition->width = 0;
 539       requisition->height = DRAG_HANDLE_SIZE;
 540     }
 541
 542   /* if our child is not visible, we still request its size, since we
 543    * won't have any useful hint for our size otherwise.
 544    */
 545   if (bin->child)
 546     gtk_widget_size_request (bin->child, &child_requisition);
 547   else
 548     {
 549       child_requisition.width = 0;
 550       child_requisition.height = 0;
 551     }
 552
 553   if (hb->child_detached)
 554     {
 555       /* FIXME: This doesn't work currently */
 556       if (!hb->shrink_on_detach)
 557         {
 558           if (handle_position == GTK_POS_LEFT ||
 559               handle_position == GTK_POS_RIGHT)
 560             requisition->height += child_requisition.height;
 561           else
 562             requisition->width += child_requisition.width;
 563         }
 564       else
 565         {
 566           if (handle_position == GTK_POS_LEFT ||
 567               handle_position == GTK_POS_RIGHT)
 568             requisition->height += widget->style->ythickness;
 569           else
 570             requisition->width += widget->style->xthickness;
 571         }
 572     }
 573   else
 574     {
 575       requisition->width += GTK_CONTAINER (widget)->border_width * 2;
 576       requisition->height += GTK_CONTAINER (widget)->border_width * 2;
 577
 578       if (bin->child)
 579         {
 580           requisition->width += child_requisition.width;
 581           requisition->height += child_requisition.height;
 582         }
 583       else
 584         {
 585           requisition->width += CHILDLESS_SIZE;
 586           requisition->height += CHILDLESS_SIZE;
 587         }
 588     }
 589 }
 590
 591 static void
 592 gtk_handle_box_size_allocate (GtkWidget     *widget,
 593                               GtkAllocation *allocation)
 594 {
 595   GtkBin *bin;
 596   GtkHandleBox *hb;
 597   GtkRequisition child_requisition;
 598   gint handle_position;
 599
 600   bin = GTK_BIN (widget);
 601   hb = GTK_HANDLE_BOX (widget);
 602
 603   handle_position = effective_handle_position (hb);
 604
 605   if (bin->child)
 606     gtk_widget_get_child_requisition (bin->child, &child_requisition);
 607   else
 608     {
 609       child_requisition.width = 0;
 610       child_requisition.height = 0;
 611     }
 612
 613   widget->allocation = *allocation;
 614
 615   if (GTK_WIDGET_REALIZED (hb))
 616     gdk_window_move_resize (widget->window,
 617                             widget->allocation.x,
 618                             widget->allocation.y,
 619                             widget->allocation.width,
 620                             widget->allocation.height);
 621
 622
 623   if (bin->child && gtk_widget_get_visible (bin->child))
 624     {
 625       GtkAllocation child_allocation;
 626       guint border_width;
 627
 628       border_width = GTK_CONTAINER (widget)->border_width;
 629
 630       child_allocation.x = border_width;
 631       child_allocation.y = border_width;
 632       if (handle_position == GTK_POS_LEFT)
 633         child_allocation.x += DRAG_HANDLE_SIZE;
 634       else if (handle_position == GTK_POS_TOP)
 635         child_allocation.y += DRAG_HANDLE_SIZE;
 636
 637       if (hb->child_detached)
 638         {
 639           guint float_width;
 640           guint float_height;
 641
 642           child_allocation.width = child_requisition.width;
 643           child_allocation.height = child_requisition.height;
 644
 645           float_width = child_allocation.width + 2 * border_width;
 646           float_height = child_allocation.height + 2 * border_width;
 647
 648           if (handle_position == GTK_POS_LEFT ||
 649               handle_position == GTK_POS_RIGHT)
 650             float_width += DRAG_HANDLE_SIZE;
 651           else
 652             float_height += DRAG_HANDLE_SIZE;
 653
 654           if (GTK_WIDGET_REALIZED (hb))
 655             {
 656               gdk_window_resize (hb->float_window,
 657                                  float_width,
 658                                  float_height);
 659               gdk_window_move_resize (hb->bin_window,
 660                                       0,
 661                                       0,
 662                                       float_width,
 663                                       float_height);
 664             }
 665         }
 666       else
 667         {
 668           child_allocation.width = MAX (1, (gint)widget->allocation.width - 2 * border_width);
 669           child_allocation.height = MAX (1, (gint)widget->allocation.height - 2 * border_width);
 670
 671           if (handle_position == GTK_POS_LEFT ||
 672               handle_position == GTK_POS_RIGHT)
 673             child_allocation.width -= DRAG_HANDLE_SIZE;
 674           else
 675             child_allocation.height -= DRAG_HANDLE_SIZE;
 676
 677           if (GTK_WIDGET_REALIZED (hb))
 678             gdk_window_move_resize (hb->bin_window,
 679                                     0,
 680                                     0,
 681                                     widget->allocation.width,
 682                                     widget->allocation.height);
 683         }
 684
 685       gtk_widget_size_allocate (bin->child, &child_allocation);
 686     }
 687 }
 688
 689 static void
 690 gtk_handle_box_draw_ghost (GtkHandleBox *hb)
 691 {
 692   GtkWidget *widget;
 693   guint x;
 694   guint y;
 695   guint width;
 696   guint height;
 697   gint handle_position;
 698
 699   widget = GTK_WIDGET (hb);
 700
 701   handle_position = effective_handle_position (hb);
 702   if (handle_position == GTK_POS_LEFT ||
 703       handle_position == GTK_POS_RIGHT)
 704     {
 705       x = handle_position == GTK_POS_LEFT ? 0 : widget->allocation.width - DRAG_HANDLE_SIZE;
 706       y = 0;
 707       width = DRAG_HANDLE_SIZE;
 708       height = widget->allocation.height;
 709     }
 710   else
 711     {
 712       x = 0;
 713       y = handle_position == GTK_POS_TOP ? 0 : widget->allocation.height - DRAG_HANDLE_SIZE;
 714       width = widget->allocation.width;
 715       height = DRAG_HANDLE_SIZE;
 716     }
 717   gtk_paint_shadow (widget->style,
 718                     widget->window,
 719                     GTK_WIDGET_STATE (widget),
 720                     GTK_SHADOW_ETCHED_IN,
 721                     NULL, widget, "handle",
 722                     x,
 723                     y,
 724                     width,
 725                     height);
 726    if (handle_position == GTK_POS_LEFT ||
 727        handle_position == GTK_POS_RIGHT)
 728      gtk_paint_hline (widget->style,
 729                       widget->window,
 730                       GTK_WIDGET_STATE (widget),
 731                       NULL, widget, "handlebox",
 732                       handle_position == GTK_POS_LEFT ? DRAG_HANDLE_SIZE : 0,
 733                       handle_position == GTK_POS_LEFT ? widget->allocation.width : widget->allocation.width - DRAG_HANDLE_SIZE,
 734                       widget->allocation.height / 2);
 735    else
 736      gtk_paint_vline (widget->style,
 737                       widget->window,
 738                       GTK_WIDGET_STATE (widget),
 739                       NULL, widget, "handlebox",
 740                       handle_position == GTK_POS_TOP ? DRAG_HANDLE_SIZE : 0,
 741                       handle_position == GTK_POS_TOP ? widget->allocation.height : widget->allocation.height - DRAG_HANDLE_SIZE,
 742                       widget->allocation.width / 2);
 743 }
 744
 745 static void
 746 draw_textured_frame (GtkWidget *widget, GdkWindow *window, GdkRectangle *rect, GtkShadowType shadow,
 747                      GdkRectangle *clip, GtkOrientation orientation)
 748 {
 749    gtk_paint_handle (widget->style, window, GTK_STATE_NORMAL, shadow,
 750                      clip, widget, "handlebox",
 751                      rect->x, rect->y, rect->width, rect->height,
 752                      orientation);
 753 }
 754
 755 void
 756 gtk_handle_box_set_shadow_type (GtkHandleBox  *handle_box,
 757                                 GtkShadowType  type)
 758 {
 759   g_return_if_fail (GTK_IS_HANDLE_BOX (handle_box));
 760
 761   if ((GtkShadowType) handle_box->shadow_type != type)
 762     {
 763       handle_box->shadow_type = type;
 764       g_object_notify (G_OBJECT (handle_box), "shadow-type");
 765       gtk_widget_queue_resize (GTK_WIDGET (handle_box));
 766     }
 767 }
 768
 769 /**
 770  * gtk_handle_box_get_shadow_type:
 771  * @handle_box: a #GtkHandleBox
 772  *
 773  * Gets the type of shadow drawn around the handle box. See
 774  * gtk_handle_box_set_shadow_type().
 775  *
 776  * Return value: the type of shadow currently drawn around the handle box.
 777  **/
 778 GtkShadowType
 779 gtk_handle_box_get_shadow_type (GtkHandleBox *handle_box)
 780 {
 781   g_return_val_if_fail (GTK_IS_HANDLE_BOX (handle_box), GTK_SHADOW_ETCHED_OUT);
 782
 783   return handle_box->shadow_type;
 784 }
 785
 786 void
 787 gtk_handle_box_set_handle_position  (GtkHandleBox    *handle_box,
 788                                      GtkPositionType  position)
 789 {
 790   g_return_if_fail (GTK_IS_HANDLE_BOX (handle_box));
 791
 792   if ((GtkPositionType) handle_box->handle_position != position)
 793     {
 794       handle_box->handle_position = position;
 795       g_object_notify (G_OBJECT (handle_box), "handle-position");
 796       gtk_widget_queue_resize (GTK_WIDGET (handle_box));
 797     }
 798 }
 799
 800 /**
 801  * gtk_handle_box_get_handle_position:
 802  * @handle_box: a #GtkHandleBox
 803  *
 804  * Gets the handle position of the handle box. See
 805  * gtk_handle_box_set_handle_position().
 806  *
 807  * Return value: the current handle position.
 808  **/
 809 GtkPositionType
 810 gtk_handle_box_get_handle_position (GtkHandleBox *handle_box)
 811 {
 812   g_return_val_if_fail (GTK_IS_HANDLE_BOX (handle_box), GTK_POS_LEFT);
 813
 814   return handle_box->handle_position;
 815 }
 816
 817 void
 818 gtk_handle_box_set_snap_edge        (GtkHandleBox    *handle_box,
 819                                      GtkPositionType  edge)
 820 {
 821   g_return_if_fail (GTK_IS_HANDLE_BOX (handle_box));
 822
 823   if (handle_box->snap_edge != edge)
 824     {
 825       handle_box->snap_edge = edge;
 826
 827       g_object_freeze_notify (G_OBJECT (handle_box));
 828       g_object_notify (G_OBJECT (handle_box), "snap-edge");
 829       g_object_notify (G_OBJECT (handle_box), "snap-edge-set");
 830       g_object_thaw_notify (G_OBJECT (handle_box));
 831     }
 832 }
 833
 834 /**
 835  * gtk_handle_box_get_snap_edge:
 836  * @handle_box: a #GtkHandleBox
 837  *
 838  * Gets the edge used for determining reattachment of the handle box. See
 839  * gtk_handle_box_set_snap_edge().
 840  *
 841  * Return value: the edge used for determining reattachment, or (GtkPositionType)-1 if this
 842  *               is determined (as per default) from the handle position.
 843  **/
 844 GtkPositionType
 845 gtk_handle_box_get_snap_edge (GtkHandleBox *handle_box)
 846 {
 847   g_return_val_if_fail (GTK_IS_HANDLE_BOX (handle_box), (GtkPositionType)-1);
 848
 849   return handle_box->snap_edge;
 850 }
 851
 852 /**
 853  * gtk_handle_box_get_child_detached:
 854  * @handle_box: a #GtkHandleBox
 855  *
 856  * Whether the handlebox's child is currently detached.
 857  *
 858  * Return value: %TRUE if the child is currently detached, otherwise %FALSE
 859  *
 860  * Since: 2.14
 861  **/
 862 gboolean
 863 gtk_handle_box_get_child_detached (GtkHandleBox *handle_box)
 864 {
 865   g_return_val_if_fail (GTK_IS_HANDLE_BOX (handle_box), FALSE);
 866
 867   return handle_box->child_detached;
 868 }
 869
 870 static void
 871 gtk_handle_box_paint (GtkWidget      *widget,
 872                       GdkEventExpose *event,
 873                       GdkRectangle   *area)
 874 {
 875   GtkBin *bin;
 876   GtkHandleBox *hb;
 877   gint width, height;
 878   GdkRectangle rect;
 879   GdkRectangle dest;
 880   gint handle_position;
 881   GtkOrientation handle_orientation;
 882
 883   bin = GTK_BIN (widget);
 884   hb = GTK_HANDLE_BOX (widget);
 885
 886   handle_position = effective_handle_position (hb);
 887
 888   gdk_drawable_get_size (hb->bin_window, &width, &height);
 889
 890   if (!event)
 891     gtk_paint_box (widget->style,
 892                    hb->bin_window,
 893                    GTK_WIDGET_STATE (widget),
 894                    hb->shadow_type,
 895                    area, widget, "handlebox_bin",
 896                    0, 0, -1, -1);
 897   else
 898    gtk_paint_box (widget->style,
 899                   hb->bin_window,
 900                   GTK_WIDGET_STATE (widget),
 901                   hb->shadow_type,
 902                   &event->area, widget, "handlebox_bin",
 903                   0, 0, -1, -1);
 904
 905 /* We currently draw the handle _above_ the relief of the handlebox.
 906  * it could also be drawn on the same level...
 907
 908                  hb->handle_position == GTK_POS_LEFT ? DRAG_HANDLE_SIZE : 0,
 909                  hb->handle_position == GTK_POS_TOP ? DRAG_HANDLE_SIZE : 0,
 910                  width,
 911                  height);*/
 912
 913   switch (handle_position)
 914     {
 915     case GTK_POS_LEFT:
 916       rect.x = 0;
 917       rect.y = 0;
 918       rect.width = DRAG_HANDLE_SIZE;
 919       rect.height = height;
 920       handle_orientation = GTK_ORIENTATION_VERTICAL;
 921       break;
 922     case GTK_POS_RIGHT:
 923       rect.x = width - DRAG_HANDLE_SIZE;
 924       rect.y = 0;
 925       rect.width = DRAG_HANDLE_SIZE;
 926       rect.height = height;
 927       handle_orientation = GTK_ORIENTATION_VERTICAL;
 928       break;
 929     case GTK_POS_TOP:
 930       rect.x = 0;
 931       rect.y = 0;
 932       rect.width = width;
 933       rect.height = DRAG_HANDLE_SIZE;
 934       handle_orientation = GTK_ORIENTATION_HORIZONTAL;
 935       break;
 936     case GTK_POS_BOTTOM:
 937       rect.x = 0;
 938       rect.y = height - DRAG_HANDLE_SIZE;
 939       rect.width = width;
 940       rect.height = DRAG_HANDLE_SIZE;
 941       handle_orientation = GTK_ORIENTATION_HORIZONTAL;
 942       break;
 943     default:
 944       g_assert_not_reached ();
 945       break;
 946     }
 947
 948   if (gdk_rectangle_intersect (event ? &event->area : area, &rect, &dest))
 949     draw_textured_frame (widget, hb->bin_window, &rect,
 950                          GTK_SHADOW_OUT,
 951                          event ? &event->area : area,
 952                          handle_orientation);
 953
 954   if (bin->child && gtk_widget_get_visible (bin->child))
 955     GTK_WIDGET_CLASS (gtk_handle_box_parent_class)->expose_event (widget, event);
 956 }
 957
 958 static gboolean
 959 gtk_handle_box_expose (GtkWidget      *widget,
 960                        GdkEventExpose *event)
 961 {
 962   GtkHandleBox *hb;
 963
 964   if (gtk_widget_is_drawable (widget))
 965     {
 966       hb = GTK_HANDLE_BOX (widget);
 967
 968       if (event->window == widget->window)
 969         {
 970           if (hb->child_detached)
 971             gtk_handle_box_draw_ghost (hb);
 972         }
 973       else
 974         gtk_handle_box_paint (widget, event, NULL);
 975     }
 976
 977   return FALSE;
 978 }
 979
 980 static GtkWidget *
 981 gtk_handle_box_get_invisible (void)
 982 {
 983   static GtkWidget *handle_box_invisible = NULL;
 984
 985   if (!handle_box_invisible)
 986     {
 987       handle_box_invisible = gtk_invisible_new ();
 988       gtk_widget_show (handle_box_invisible);
 989     }
 990
 991   return handle_box_invisible;
 992 }
 993
 994 static gboolean
 995 gtk_handle_box_grab_event (GtkWidget    *widget,
 996                            GdkEvent     *event,
 997                            GtkHandleBox *hb)
 998 {
 999   switch (event->type)
1000     {
1001     case GDK_BUTTON_RELEASE:
1002       if (hb->in_drag)          /* sanity check */
1003         {
1004           gtk_handle_box_end_drag (hb, event->button.time);
1005           return TRUE;
1006         }
1007       break;
1008
1009     case GDK_MOTION_NOTIFY:
1010       return gtk_handle_box_motion (GTK_WIDGET (hb), (GdkEventMotion *)event);
1011       break;
1012
1013     default:
1014       break;
1015     }
1016
1017   return FALSE;
1018 }
1019
1020 static gboolean
1021 gtk_handle_box_button_press (GtkWidget      *widget,
1022                              GdkEventButton *event)
1023 {
1024   GtkHandleBox *hb;
1025   gboolean event_handled;
1026   GdkCursor *fleur;
1027   gint handle_position;
1028
1029   hb = GTK_HANDLE_BOX (widget);
1030
1031   handle_position = effective_handle_position (hb);
1032
1033   event_handled = FALSE;
1034   if ((event->button == 1) &&
1035       (event->type == GDK_BUTTON_PRESS || event->type == GDK_2BUTTON_PRESS))
1036     {
1037       GtkWidget *child;
1038       gboolean in_handle;
1039
1040       if (event->window != hb->bin_window)
1041         return FALSE;
1042
1043       child = GTK_BIN (hb)->child;
1044
1045       if (child)
1046         {
1047           switch (handle_position)
1048             {
1049             case GTK_POS_LEFT:
1050               in_handle = event->x < DRAG_HANDLE_SIZE;
1051               break;
1052             case GTK_POS_TOP:
1053               in_handle = event->y < DRAG_HANDLE_SIZE;
1054               break;
1055             case GTK_POS_RIGHT:
1056               in_handle = event->x > 2 * GTK_CONTAINER (hb)->border_width + child->allocation.width;
1057               break;
1058             case GTK_POS_BOTTOM:
1059               in_handle = event->y > 2 * GTK_CONTAINER (hb)->border_width + child->allocation.height;
1060               break;
1061             default:
1062               in_handle = FALSE;
1063               break;
1064             }
1065         }
1066       else
1067         {
1068           in_handle = FALSE;
1069           event_handled = TRUE;
1070         }
1071
1072       if (in_handle)
1073         {
1074           if (event->type == GDK_BUTTON_PRESS) /* Start a drag */
1075             {
1076               GtkHandleBoxPrivate *private = gtk_handle_box_get_private (hb);
1077               GtkWidget *invisible = gtk_handle_box_get_invisible ();
1078               gint desk_x, desk_y;
1079               gint root_x, root_y;
1080               gint width, height;
1081
1082               gtk_invisible_set_screen (GTK_INVISIBLE (invisible),
1083                                         gtk_widget_get_screen (GTK_WIDGET (hb)));
1084               gdk_window_get_deskrelative_origin (hb->bin_window, &desk_x, &desk_y);
1085               gdk_window_get_origin (hb->bin_window, &root_x, &root_y);
1086               gdk_drawable_get_size (hb->bin_window, &width, &height);
1087
1088               private->orig_x = event->x_root;
1089               private->orig_y = event->y_root;
1090
1091               hb->float_allocation.x = root_x - event->x_root;
1092               hb->float_allocation.y = root_y - event->y_root;
1093               hb->float_allocation.width = width;
1094               hb->float_allocation.height = height;
1095
1096               hb->deskoff_x = desk_x - root_x;
1097               hb->deskoff_y = desk_y - root_y;
1098
1099               if (gdk_window_is_viewable (widget->window))
1100                 {
1101                   gdk_window_get_origin (widget->window, &root_x, &root_y);
1102                   gdk_drawable_get_size (widget->window, &width, &height);
1103
1104                   hb->attach_allocation.x = root_x;
1105                   hb->attach_allocation.y = root_y;
1106                   hb->attach_allocation.width = width;
1107                   hb->attach_allocation.height = height;
1108                 }
1109               else
1110                 {
1111                   hb->attach_allocation.x = -1;
1112                   hb->attach_allocation.y = -1;
1113                   hb->attach_allocation.width = 0;
1114                   hb->attach_allocation.height = 0;
1115                 }
1116               hb->in_drag = TRUE;
1117               fleur = gdk_cursor_new_for_display (gtk_widget_get_display (widget),
1118                                                   GDK_FLEUR);
1119               if (gdk_pointer_grab (invisible->window,
1120                                     FALSE,
1121                                     (GDK_BUTTON1_MOTION_MASK |
1122                                      GDK_POINTER_MOTION_HINT_MASK |
1123                                      GDK_BUTTON_RELEASE_MASK),
1124                                     NULL,
1125                                     fleur,
1126                                     event->time) != 0)
1127                 {
1128                   hb->in_drag = FALSE;
1129                 }
1130               else
1131                 {
1132                   gtk_grab_add (invisible);
1133                   g_signal_connect (invisible, "event",
1134                                     G_CALLBACK (gtk_handle_box_grab_event), hb);
1135                 }
1136
1137               gdk_cursor_unref (fleur);
1138               event_handled = TRUE;
1139             }
1140           else if (hb->child_detached) /* Double click */
1141             {
1142               gtk_handle_box_reattach (hb);
1143             }
1144         }
1145     }
1146
1147   return event_handled;
1148 }
1149
1150 static gboolean
1151 gtk_handle_box_motion (GtkWidget      *widget,
1152                        GdkEventMotion *event)
1153 {
1154   GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
1155   gint new_x, new_y;
1156   gint snap_edge;
1157   gboolean is_snapped = FALSE;
1158   gint handle_position;
1159   GdkGeometry geometry;
1160   GdkScreen *screen, *pointer_screen;
1161
1162   if (!hb->in_drag)
1163     return FALSE;
1164   handle_position = effective_handle_position (hb);
1165
1166   /* Calculate the attachment point on the float, if the float
1167    * were detached
1168    */
1169   new_x = 0;
1170   new_y = 0;
1171   screen = gtk_widget_get_screen (widget);
1172   gdk_display_get_pointer (gdk_screen_get_display (screen),
1173                            &pointer_screen,
1174                            &new_x, &new_y, NULL);
1175   if (pointer_screen != screen)
1176     {
1177       GtkHandleBoxPrivate *private = gtk_handle_box_get_private (hb);
1178
1179       new_x = private->orig_x;
1180       new_y = private->orig_y;
1181     }
1182
1183   new_x += hb->float_allocation.x;
1184   new_y += hb->float_allocation.y;
1185
1186   snap_edge = hb->snap_edge;
1187   if (snap_edge == -1)
1188     snap_edge = (handle_position == GTK_POS_LEFT ||
1189                  handle_position == GTK_POS_RIGHT) ?
1190       GTK_POS_TOP : GTK_POS_LEFT;
1191
1192   if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
1193     switch (snap_edge)
1194       {
1195       case GTK_POS_LEFT:
1196         snap_edge = GTK_POS_RIGHT;
1197         break;
1198       case GTK_POS_RIGHT:
1199         snap_edge = GTK_POS_LEFT;
1200         break;
1201       default:
1202         break;
1203       }
1204
1205   /* First, check if the snapped edge is aligned
1206    */
1207   switch (snap_edge)
1208     {
1209     case GTK_POS_TOP:
1210       is_snapped = abs (hb->attach_allocation.y - new_y) < TOLERANCE;
1211       break;
1212     case GTK_POS_BOTTOM:
1213       is_snapped = abs (hb->attach_allocation.y + (gint)hb->attach_allocation.height -
1214                         new_y - (gint)hb->float_allocation.height) < TOLERANCE;
1215       break;
1216     case GTK_POS_LEFT:
1217       is_snapped = abs (hb->attach_allocation.x - new_x) < TOLERANCE;
1218       break;
1219     case GTK_POS_RIGHT:
1220       is_snapped = abs (hb->attach_allocation.x + (gint)hb->attach_allocation.width -
1221                         new_x - (gint)hb->float_allocation.width) < TOLERANCE;
1222       break;
1223     }
1224
1225   /* Next, check if coordinates in the other direction are sufficiently
1226    * aligned
1227    */
1228   if (is_snapped)
1229     {
1230       gint float_pos1 = 0;      /* Initialize to suppress warnings */
1231       gint float_pos2 = 0;
1232       gint attach_pos1 = 0;
1233       gint attach_pos2 = 0;
1234
1235       switch (snap_edge)
1236         {
1237         case GTK_POS_TOP:
1238         case GTK_POS_BOTTOM:
1239           attach_pos1 = hb->attach_allocation.x;
1240           attach_pos2 = hb->attach_allocation.x + hb->attach_allocation.width;
1241           float_pos1 = new_x;
1242           float_pos2 = new_x + hb->float_allocation.width;
1243           break;
1244         case GTK_POS_LEFT:
1245         case GTK_POS_RIGHT:
1246           attach_pos1 = hb->attach_allocation.y;
1247           attach_pos2 = hb->attach_allocation.y + hb->attach_allocation.height;
1248           float_pos1 = new_y;
1249           float_pos2 = new_y + hb->float_allocation.height;
1250           break;
1251         }
1252
1253       is_snapped = ((attach_pos1 - TOLERANCE < float_pos1) &&
1254                     (attach_pos2 + TOLERANCE > float_pos2)) ||
1255                    ((float_pos1 - TOLERANCE < attach_pos1) &&
1256                     (float_pos2 + TOLERANCE > attach_pos2));
1257     }
1258
1259   if (is_snapped)
1260     {
1261       if (hb->child_detached)
1262         {
1263           hb->child_detached = FALSE;
1264           gdk_window_hide (hb->float_window);
1265           gdk_window_reparent (hb->bin_window, widget->window, 0, 0);
1266           hb->float_window_mapped = FALSE;
1267           g_signal_emit (hb,
1268                          handle_box_signals[SIGNAL_CHILD_ATTACHED],
1269                          0,
1270                          GTK_BIN (hb)->child);
1271
1272           gtk_widget_queue_resize (widget);
1273         }
1274     }
1275   else
1276     {
1277       gint width, height;
1278
1279       gdk_drawable_get_size (hb->float_window, &width, &height);
1280       new_x += hb->deskoff_x;
1281       new_y += hb->deskoff_y;
1282
1283       switch (handle_position)
1284         {
1285         case GTK_POS_LEFT:
1286           new_y += ((gint)hb->float_allocation.height - height) / 2;
1287           break;
1288         case GTK_POS_RIGHT:
1289           new_x += (gint)hb->float_allocation.width - width;
1290           new_y += ((gint)hb->float_allocation.height - height) / 2;
1291           break;
1292         case GTK_POS_TOP:
1293           new_x += ((gint)hb->float_allocation.width - width) / 2;
1294           break;
1295         case GTK_POS_BOTTOM:
1296           new_x += ((gint)hb->float_allocation.width - width) / 2;
1297           new_y += (gint)hb->float_allocation.height - height;
1298           break;
1299         }
1300
1301       if (hb->child_detached)
1302         {
1303           gdk_window_move (hb->float_window, new_x, new_y);
1304           gdk_window_raise (hb->float_window);
1305         }
1306       else
1307         {
1308           gint width;
1309           gint height;
1310           GtkRequisition child_requisition;
1311
1312           hb->child_detached = TRUE;
1313
1314           if (GTK_BIN (hb)->child)
1315             gtk_widget_get_child_requisition (GTK_BIN (hb)->child, &child_requisition);
1316           else
1317             {
1318               child_requisition.width = 0;
1319               child_requisition.height = 0;
1320             }
1321
1322           width = child_requisition.width + 2 * GTK_CONTAINER (hb)->border_width;
1323           height = child_requisition.height + 2 * GTK_CONTAINER (hb)->border_width;
1324
1325           if (handle_position == GTK_POS_LEFT || handle_position == GTK_POS_RIGHT)
1326             width += DRAG_HANDLE_SIZE;
1327           else
1328             height += DRAG_HANDLE_SIZE;
1329
1330           gdk_window_move_resize (hb->float_window, new_x, new_y, width, height);
1331           gdk_window_reparent (hb->bin_window, hb->float_window, 0, 0);
1332           gdk_window_set_geometry_hints (hb->float_window, &geometry, GDK_HINT_POS);
1333           gdk_window_show (hb->float_window);
1334           hb->float_window_mapped = TRUE;
1335 #if     0
1336           /* this extra move is necessary if we use decorations, or our
1337            * window manager insists on decorations.
1338            */
1339           gdk_display_sync (gtk_widget_get_display (widget));
1340           gdk_window_move (hb->float_window, new_x, new_y);
1341           gdk_display_sync (gtk_widget_get_display (widget));
1342 #endif  /* 0 */
1343           g_signal_emit (hb,
1344                          handle_box_signals[SIGNAL_CHILD_DETACHED],
1345                          0,
1346                          GTK_BIN (hb)->child);
1347           gtk_handle_box_draw_ghost (hb);
1348
1349           gtk_widget_queue_resize (widget);
1350         }
1351     }
1352
1353   return TRUE;
1354 }
1355
1356 static void
1357 gtk_handle_box_add (GtkContainer *container,
1358                     GtkWidget    *widget)
1359 {
1360   gtk_widget_set_parent_window (widget, GTK_HANDLE_BOX (container)->bin_window);
1361   GTK_CONTAINER_CLASS (gtk_handle_box_parent_class)->add (container, widget);
1362 }
1363
1364 static void
1365 gtk_handle_box_remove (GtkContainer *container,
1366                        GtkWidget    *widget)
1367 {
1368   GTK_CONTAINER_CLASS (gtk_handle_box_parent_class)->remove (container, widget);
1369
1370   gtk_handle_box_reattach (GTK_HANDLE_BOX (container));
1371 }
1372
1373 static gint
1374 gtk_handle_box_delete_event (GtkWidget *widget,
1375                              GdkEventAny  *event)
1376 {
1377   GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
1378
1379   if (event->window == hb->float_window)
1380     {
1381       gtk_handle_box_reattach (hb);
1382
1383       return TRUE;
1384     }
1385
1386   return FALSE;
1387 }
1388
1389 static void
1390 gtk_handle_box_reattach (GtkHandleBox *hb)
1391 {
1392   GtkWidget *widget = GTK_WIDGET (hb);
1393
1394   if (hb->child_detached)
1395     {
1396       hb->child_detached = FALSE;
1397       if (GTK_WIDGET_REALIZED (hb))
1398         {
1399           gdk_window_hide (hb->float_window);
1400           gdk_window_reparent (hb->bin_window, widget->window, 0, 0);
1401
1402           if (GTK_BIN (hb)->child)
1403             g_signal_emit (hb,
1404                            handle_box_signals[SIGNAL_CHILD_ATTACHED],
1405                            0,
1406                            GTK_BIN (hb)->child);
1407
1408         }
1409       hb->float_window_mapped = FALSE;
1410     }
1411   if (hb->in_drag)
1412     gtk_handle_box_end_drag (hb, GDK_CURRENT_TIME);
1413
1414   gtk_widget_queue_resize (GTK_WIDGET (hb));
1415 }
1416
1417 static void
1418 gtk_handle_box_end_drag (GtkHandleBox *hb,
1419                          guint32       time)
1420 {
1421   GtkWidget *invisible = gtk_handle_box_get_invisible ();
1422
1423   hb->in_drag = FALSE;
1424
1425   gtk_grab_remove (invisible);
1426   gdk_pointer_ungrab (time);
1427   g_signal_handlers_disconnect_by_func (invisible,
1428                                         G_CALLBACK (gtk_handle_box_grab_event),
1429                                         hb);
1430 }
1431
1432 #define __GTK_HANDLE_BOX_C__
1433 #include "gtkaliasdef.c"