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
  38
  39
  40 struct _GtkHandleBoxPrivate
  41 {
  42   /* Properties */
  43   GtkPositionType handle_position;
  44   GtkPositionType snap_edge;
  45   GtkShadowType   shadow_type;
  46   gboolean        child_detached;
  47   /* Properties */
  48
  49   GtkAllocation   attach_allocation;
  50   GtkAllocation   float_allocation;
  51
  52   GdkDevice      *grab_device;
  53
  54   GdkWindow      *bin_window;     /* parent window for children */
  55   GdkWindow      *float_window;
  56
  57   /* Variables used during a drag
  58    */
  59   gint            deskoff_x;      /* Offset between root relative coords */
  60   gint            deskoff_y;      /* and deskrelative coords             */
  61
  62   gint            orig_x;
  63   gint            orig_y;
  64
  65   guint           float_window_mapped : 1;
  66   guint           in_drag : 1;
  67   guint           shrink_on_detach : 1;
  68 };
  69
  70 enum {
  71   PROP_0,
  72   PROP_SHADOW,
  73   PROP_SHADOW_TYPE,
  74   PROP_HANDLE_POSITION,
  75   PROP_SNAP_EDGE,
  76   PROP_SNAP_EDGE_SET,
  77   PROP_CHILD_DETACHED
  78 };
  79
  80 #define DRAG_HANDLE_SIZE 10
  81 #define CHILDLESS_SIZE  25
  82 #define GHOST_HEIGHT 3
  83 #define TOLERANCE 5
  84
  85 enum {
  86   SIGNAL_CHILD_ATTACHED,
  87   SIGNAL_CHILD_DETACHED,
  88   SIGNAL_LAST
  89 };
  90
  91 /* The algorithm for docking and redocking implemented here
  92  * has a couple of nice properties:
  93  *
  94  * 1) During a single drag, docking always occurs at the
  95  *    the same cursor position. This means that the users
  96  *    motions are reversible, and that you won't
  97  *    undock/dock oscillations.
  98  *
  99  * 2) Docking generally occurs at user-visible features.
 100  *    The user, once they figure out to redock, will
 101  *    have useful information about doing it again in
 102  *    the future.
 103  *
 104  * Please try to preserve these properties if you
 105  * change the algorithm. (And the current algorithm
 106  * is far from ideal). Briefly, the current algorithm
 107  * for deciding whether the handlebox is docked or not:
 108  *
 109  * 1) The decision is done by comparing two rectangles - the
 110  *    allocation if the widget at the start of the drag,
 111  *    and the boundary of hb->bin_window at the start of
 112  *    of the drag offset by the distance that the cursor
 113  *    has moved.
 114  *
 115  * 2) These rectangles must have one edge, the "snap_edge"
 116  *    of the handlebox, aligned within TOLERANCE.
 117  *
 118  * 3) On the other dimension, the extents of one rectangle
 119  *    must be contained in the extents of the other,
 120  *    extended by tolerance. That is, either we can have:
 121  *
 122  * <-TOLERANCE-|--------bin_window--------------|-TOLERANCE->
 123  *         <--------float_window-------------------->
 124  *
 125  * or we can have:
 126  *
 127  * <-TOLERANCE-|------float_window--------------|-TOLERANCE->
 128  *          <--------bin_window-------------------->
 129  */
 130
 131 static void     gtk_handle_box_set_property  (GObject        *object,
 132                                               guint           param_id,
 133                                               const GValue   *value,
 134                                               GParamSpec     *pspec);
 135 static void     gtk_handle_box_get_property  (GObject        *object,
 136                                               guint           param_id,
 137                                               GValue         *value,
 138                                               GParamSpec     *pspec);
 139 static void     gtk_handle_box_map           (GtkWidget      *widget);
 140 static void     gtk_handle_box_unmap         (GtkWidget      *widget);
 141 static void     gtk_handle_box_realize       (GtkWidget      *widget);
 142 static void     gtk_handle_box_unrealize     (GtkWidget      *widget);
 143 static void     gtk_handle_box_style_set     (GtkWidget      *widget,
 144                                               GtkStyle       *previous_style);
 145 static void     gtk_handle_box_size_request  (GtkWidget      *widget,
 146                                               GtkRequisition *requisition);
 147 static void     gtk_handle_box_size_allocate (GtkWidget      *widget,
 148                                               GtkAllocation  *real_allocation);
 149 static void     gtk_handle_box_add           (GtkContainer   *container,
 150                                               GtkWidget      *widget);
 151 static void     gtk_handle_box_remove        (GtkContainer   *container,
 152                                               GtkWidget      *widget);
 153 static void     gtk_handle_box_draw_ghost    (GtkHandleBox   *hb);
 154 static void     gtk_handle_box_paint         (GtkWidget      *widget,
 155                                               GdkEventExpose *event,
 156                                               GdkRectangle   *area);
 157 static gboolean gtk_handle_box_expose        (GtkWidget      *widget,
 158                                               GdkEventExpose *event);
 159 static gboolean gtk_handle_box_button_press  (GtkWidget      *widget,
 160                                               GdkEventButton *event);
 161 static gboolean gtk_handle_box_motion        (GtkWidget      *widget,
 162                                               GdkEventMotion *event);
 163 static gboolean gtk_handle_box_delete_event  (GtkWidget      *widget,
 164                                               GdkEventAny    *event);
 165 static void     gtk_handle_box_reattach      (GtkHandleBox   *hb);
 166 static void     gtk_handle_box_end_drag      (GtkHandleBox   *hb,
 167                                               guint32         time);
 168
 169 static guint handle_box_signals[SIGNAL_LAST] = { 0 };
 170
 171 G_DEFINE_TYPE (GtkHandleBox, gtk_handle_box, GTK_TYPE_BIN)
 172
 173 static void
 174 gtk_handle_box_class_init (GtkHandleBoxClass *class)
 175 {
 176   GObjectClass *gobject_class;
 177   GtkWidgetClass *widget_class;
 178   GtkContainerClass *container_class;
 179
 180   gobject_class = (GObjectClass *) class;
 181   widget_class = (GtkWidgetClass *) class;
 182   container_class = (GtkContainerClass *) class;
 183
 184   gobject_class->set_property = gtk_handle_box_set_property;
 185   gobject_class->get_property = gtk_handle_box_get_property;
 186
 187   g_object_class_install_property (gobject_class,
 188                                    PROP_SHADOW,
 189                                    g_param_spec_enum ("shadow", NULL,
 190                                                       P_("Deprecated property, use shadow_type instead"),
 191                                                       GTK_TYPE_SHADOW_TYPE,
 192                                                       GTK_SHADOW_OUT,
 193                                                       GTK_PARAM_READWRITE));
 194   g_object_class_install_property (gobject_class,
 195                                    PROP_SHADOW_TYPE,
 196                                    g_param_spec_enum ("shadow-type",
 197                                                       P_("Shadow type"),
 198                                                       P_("Appearance of the shadow that surrounds the container"),
 199                                                       GTK_TYPE_SHADOW_TYPE,
 200                                                       GTK_SHADOW_OUT,
 201                                                       GTK_PARAM_READWRITE));
 202
 203   g_object_class_install_property (gobject_class,
 204                                    PROP_HANDLE_POSITION,
 205                                    g_param_spec_enum ("handle-position",
 206                                                       P_("Handle position"),
 207                                                       P_("Position of the handle relative to the child widget"),
 208                                                       GTK_TYPE_POSITION_TYPE,
 209                                                       GTK_POS_LEFT,
 210                                                       GTK_PARAM_READWRITE));
 211
 212   g_object_class_install_property (gobject_class,
 213                                    PROP_SNAP_EDGE,
 214                                    g_param_spec_enum ("snap-edge",
 215                                                       P_("Snap edge"),
 216                                                       P_("Side of the handlebox that's lined up with the docking point to dock the handlebox"),
 217                                                       GTK_TYPE_POSITION_TYPE,
 218                                                       GTK_POS_TOP,
 219                                                       GTK_PARAM_READWRITE));
 220
 221   g_object_class_install_property (gobject_class,
 222                                    PROP_SNAP_EDGE_SET,
 223                                    g_param_spec_boolean ("snap-edge-set",
 224                                                          P_("Snap edge set"),
 225                                                          P_("Whether to use the value from the snap_edge property or a value derived from handle_position"),
 226                                                          FALSE,
 227                                                          GTK_PARAM_READWRITE));
 228
 229   g_object_class_install_property (gobject_class,
 230                                    PROP_CHILD_DETACHED,
 231                                    g_param_spec_boolean ("child-detached",
 232                                                          P_("Child Detached"),
 233                                                          P_("A boolean value indicating whether the handlebox's child is attached or detached."),
 234                                                          FALSE,
 235                                                          GTK_PARAM_READABLE));
 236
 237   widget_class->map = gtk_handle_box_map;
 238   widget_class->unmap = gtk_handle_box_unmap;
 239   widget_class->realize = gtk_handle_box_realize;
 240   widget_class->unrealize = gtk_handle_box_unrealize;
 241   widget_class->style_set = gtk_handle_box_style_set;
 242   widget_class->size_request = gtk_handle_box_size_request;
 243   widget_class->size_allocate = gtk_handle_box_size_allocate;
 244   widget_class->expose_event = gtk_handle_box_expose;
 245   widget_class->button_press_event = gtk_handle_box_button_press;
 246   widget_class->delete_event = gtk_handle_box_delete_event;
 247
 248   container_class->add = gtk_handle_box_add;
 249   container_class->remove = gtk_handle_box_remove;
 250
 251   class->child_attached = NULL;
 252   class->child_detached = NULL;
 253
 254   handle_box_signals[SIGNAL_CHILD_ATTACHED] =
 255     g_signal_new (I_("child-attached"),
 256                   G_OBJECT_CLASS_TYPE (gobject_class),
 257                   G_SIGNAL_RUN_FIRST,
 258                   G_STRUCT_OFFSET (GtkHandleBoxClass, child_attached),
 259                   NULL, NULL,
 260                   _gtk_marshal_VOID__OBJECT,
 261                   G_TYPE_NONE, 1,
 262                   GTK_TYPE_WIDGET);
 263   handle_box_signals[SIGNAL_CHILD_DETACHED] =
 264     g_signal_new (I_("child-detached"),
 265                   G_OBJECT_CLASS_TYPE (gobject_class),
 266                   G_SIGNAL_RUN_FIRST,
 267                   G_STRUCT_OFFSET (GtkHandleBoxClass, child_detached),
 268                   NULL, NULL,
 269                   _gtk_marshal_VOID__OBJECT,
 270                   G_TYPE_NONE, 1,
 271                   GTK_TYPE_WIDGET);
 272
 273   g_type_class_add_private (gobject_class, sizeof (GtkHandleBoxPrivate));
 274 }
 275
 276 static void
 277 gtk_handle_box_init (GtkHandleBox *handle_box)
 278 {
 279   GtkHandleBoxPrivate *priv;
 280
 281   handle_box->priv = G_TYPE_INSTANCE_GET_PRIVATE (handle_box,
 282                                                   GTK_TYPE_HANDLE_BOX,
 283                                                   GtkHandleBoxPrivate);
 284   priv = handle_box->priv;
 285
 286   gtk_widget_set_has_window (GTK_WIDGET (handle_box), TRUE);
 287
 288   priv->bin_window = NULL;
 289   priv->float_window = NULL;
 290   priv->shadow_type = GTK_SHADOW_OUT;
 291   priv->handle_position = GTK_POS_LEFT;
 292   priv->float_window_mapped = FALSE;
 293   priv->child_detached = FALSE;
 294   priv->in_drag = FALSE;
 295   priv->shrink_on_detach = TRUE;
 296   priv->snap_edge = -1;
 297 }
 298
 299 static void
 300 gtk_handle_box_set_property (GObject         *object,
 301                              guint            prop_id,
 302                              const GValue    *value,
 303                              GParamSpec      *pspec)
 304 {
 305   GtkHandleBox *handle_box = GTK_HANDLE_BOX (object);
 306
 307   switch (prop_id)
 308     {
 309     case PROP_SHADOW:
 310     case PROP_SHADOW_TYPE:
 311       gtk_handle_box_set_shadow_type (handle_box, g_value_get_enum (value));
 312       break;
 313     case PROP_HANDLE_POSITION:
 314       gtk_handle_box_set_handle_position (handle_box, g_value_get_enum (value));
 315       break;
 316     case PROP_SNAP_EDGE:
 317       gtk_handle_box_set_snap_edge (handle_box, g_value_get_enum (value));
 318       break;
 319     case PROP_SNAP_EDGE_SET:
 320       if (!g_value_get_boolean (value))
 321         gtk_handle_box_set_snap_edge (handle_box, (GtkPositionType)-1);
 322       break;
 323     default:
 324       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 325       break;
 326     }
 327 }
 328
 329 static void
 330 gtk_handle_box_get_property (GObject         *object,
 331                              guint            prop_id,
 332                              GValue          *value,
 333                              GParamSpec      *pspec)
 334 {
 335   GtkHandleBox *handle_box = GTK_HANDLE_BOX (object);
 336   GtkHandleBoxPrivate *priv = handle_box->priv;
 337
 338   switch (prop_id)
 339     {
 340     case PROP_SHADOW:
 341     case PROP_SHADOW_TYPE:
 342       g_value_set_enum (value, priv->shadow_type);
 343       break;
 344     case PROP_HANDLE_POSITION:
 345       g_value_set_enum (value, priv->handle_position);
 346       break;
 347     case PROP_SNAP_EDGE:
 348       g_value_set_enum (value,
 349                         (priv->snap_edge == -1 ?
 350                          GTK_POS_TOP : priv->snap_edge));
 351       break;
 352     case PROP_SNAP_EDGE_SET:
 353       g_value_set_boolean (value, priv->snap_edge != -1);
 354       break;
 355     case PROP_CHILD_DETACHED:
 356       g_value_set_boolean (value, priv->child_detached);
 357       break;
 358     default:
 359       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 360       break;
 361     }
 362 }
 363
 364 GtkWidget*
 365 gtk_handle_box_new (void)
 366 {
 367   return g_object_new (GTK_TYPE_HANDLE_BOX, NULL);
 368 }
 369
 370 static void
 371 gtk_handle_box_map (GtkWidget *widget)
 372 {
 373   GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
 374   GtkHandleBoxPrivate *priv = hb->priv;
 375   GtkBin *bin = GTK_BIN (widget);
 376   GtkWidget *child;
 377
 378   gtk_widget_set_mapped (widget, TRUE);
 379
 380   child = gtk_bin_get_child (bin);
 381   if (child != NULL &&
 382       gtk_widget_get_visible (child) &&
 383       !gtk_widget_get_mapped (child))
 384     gtk_widget_map (child);
 385
 386   if (priv->child_detached && !priv->float_window_mapped)
 387     {
 388       gdk_window_show (priv->float_window);
 389       priv->float_window_mapped = TRUE;
 390     }
 391
 392   gdk_window_show (priv->bin_window);
 393   gdk_window_show (widget->window);
 394 }
 395
 396 static void
 397 gtk_handle_box_unmap (GtkWidget *widget)
 398 {
 399   GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
 400   GtkHandleBoxPrivate *priv = hb->priv;
 401
 402   gtk_widget_set_mapped (widget, FALSE);
 403
 404   gdk_window_hide (widget->window);
 405   if (priv->float_window_mapped)
 406     {
 407       gdk_window_hide (priv->float_window);
 408       priv->float_window_mapped = FALSE;
 409     }
 410 }
 411
 412 static void
 413 gtk_handle_box_realize (GtkWidget *widget)
 414 {
 415   GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
 416   GtkHandleBoxPrivate *priv = hb->priv;
 417   GtkWidget *child;
 418   GdkWindowAttr attributes;
 419   gint attributes_mask;
 420
 421   gtk_widget_set_realized (widget, TRUE);
 422
 423   attributes.x = widget->allocation.x;
 424   attributes.y = widget->allocation.y;
 425   attributes.width = widget->allocation.width;
 426   attributes.height = widget->allocation.height;
 427   attributes.window_type = GDK_WINDOW_CHILD;
 428   attributes.wclass = GDK_INPUT_OUTPUT;
 429   attributes.visual = gtk_widget_get_visual (widget);
 430   attributes.colormap = gtk_widget_get_colormap (widget);
 431   attributes.event_mask = (gtk_widget_get_events (widget)
 432                            | GDK_EXPOSURE_MASK);
 433   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 434   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 435   gdk_window_set_user_data (widget->window, widget);
 436
 437   attributes.x = 0;
 438   attributes.y = 0;
 439   attributes.width = widget->allocation.width;
 440   attributes.height = widget->allocation.height;
 441   attributes.window_type = GDK_WINDOW_CHILD;
 442   attributes.event_mask = (gtk_widget_get_events (widget) |
 443                            GDK_EXPOSURE_MASK |
 444                            GDK_BUTTON1_MOTION_MASK |
 445                            GDK_POINTER_MOTION_HINT_MASK |
 446                            GDK_BUTTON_PRESS_MASK |
 447                             GDK_BUTTON_RELEASE_MASK);
 448   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 449   priv->bin_window = gdk_window_new (widget->window, &attributes, attributes_mask);
 450   gdk_window_set_user_data (priv->bin_window, widget);
 451
 452   child = gtk_bin_get_child (GTK_BIN (hb));
 453   if (child)
 454     gtk_widget_set_parent_window (child, priv->bin_window);
 455
 456   attributes.x = 0;
 457   attributes.y = 0;
 458   attributes.width = widget->requisition.width;
 459   attributes.height = widget->requisition.height;
 460   attributes.window_type = GDK_WINDOW_TOPLEVEL;
 461   attributes.wclass = GDK_INPUT_OUTPUT;
 462   attributes.visual = gtk_widget_get_visual (widget);
 463   attributes.colormap = gtk_widget_get_colormap (widget);
 464   attributes.event_mask = (gtk_widget_get_events (widget) |
 465                            GDK_KEY_PRESS_MASK |
 466                            GDK_ENTER_NOTIFY_MASK |
 467                            GDK_LEAVE_NOTIFY_MASK |
 468                            GDK_FOCUS_CHANGE_MASK |
 469                            GDK_STRUCTURE_MASK);
 470   attributes.type_hint = GDK_WINDOW_TYPE_HINT_TOOLBAR;
 471   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP | GDK_WA_TYPE_HINT;
 472   priv->float_window = gdk_window_new (gtk_widget_get_root_window (widget),
 473                                      &attributes, attributes_mask);
 474   gdk_window_set_user_data (priv->float_window, widget);
 475   gdk_window_set_decorations (priv->float_window, 0);
 476   gdk_window_set_type_hint (priv->float_window, GDK_WINDOW_TYPE_HINT_TOOLBAR);
 477
 478   widget->style = gtk_style_attach (widget->style, widget->window);
 479   gtk_style_set_background (widget->style, widget->window, gtk_widget_get_state (widget));
 480   gtk_style_set_background (widget->style, priv->bin_window, gtk_widget_get_state (widget));
 481   gtk_style_set_background (widget->style, priv->float_window, gtk_widget_get_state (widget));
 482   gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
 483 }
 484
 485 static void
 486 gtk_handle_box_unrealize (GtkWidget *widget)
 487 {
 488   GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
 489   GtkHandleBoxPrivate *priv = hb->priv;
 490
 491   gdk_window_set_user_data (priv->bin_window, NULL);
 492   gdk_window_destroy (priv->bin_window);
 493   priv->bin_window = NULL;
 494   gdk_window_set_user_data (priv->float_window, NULL);
 495   gdk_window_destroy (priv->float_window);
 496   priv->float_window = NULL;
 497
 498   GTK_WIDGET_CLASS (gtk_handle_box_parent_class)->unrealize (widget);
 499 }
 500
 501 static void
 502 gtk_handle_box_style_set (GtkWidget *widget,
 503                           GtkStyle  *previous_style)
 504 {
 505   GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
 506   GtkHandleBoxPrivate *priv = hb->priv;
 507
 508   if (gtk_widget_get_realized (widget) &&
 509       gtk_widget_get_has_window (widget))
 510     {
 511       gtk_style_set_background (widget->style, widget->window,
 512                                 widget->state);
 513       gtk_style_set_background (widget->style, priv->bin_window, widget->state);
 514       gtk_style_set_background (widget->style, priv->float_window, widget->state);
 515     }
 516 }
 517
 518 static int
 519 effective_handle_position (GtkHandleBox *hb)
 520 {
 521   GtkHandleBoxPrivate *priv = hb->priv;
 522   int handle_position;
 523
 524   if (gtk_widget_get_direction (GTK_WIDGET (hb)) == GTK_TEXT_DIR_LTR)
 525     handle_position = priv->handle_position;
 526   else
 527     {
 528       switch (priv->handle_position)
 529         {
 530         case GTK_POS_LEFT:
 531           handle_position = GTK_POS_RIGHT;
 532           break;
 533         case GTK_POS_RIGHT:
 534           handle_position = GTK_POS_LEFT;
 535           break;
 536         default:
 537           handle_position = priv->handle_position;
 538           break;
 539         }
 540     }
 541
 542   return handle_position;
 543 }
 544
 545 static void
 546 gtk_handle_box_size_request (GtkWidget      *widget,
 547                              GtkRequisition *requisition)
 548 {
 549   GtkBin *bin = GTK_BIN (widget);
 550   GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
 551   GtkHandleBoxPrivate *priv = hb->priv;
 552   GtkRequisition child_requisition;
 553   GtkWidget *child;
 554   gint handle_position;
 555
 556   handle_position = effective_handle_position (hb);
 557
 558   if (handle_position == GTK_POS_LEFT ||
 559       handle_position == GTK_POS_RIGHT)
 560     {
 561       requisition->width = DRAG_HANDLE_SIZE;
 562       requisition->height = 0;
 563     }
 564   else
 565     {
 566       requisition->width = 0;
 567       requisition->height = DRAG_HANDLE_SIZE;
 568     }
 569
 570   child = gtk_bin_get_child (bin);
 571   /* if our child is not visible, we still request its size, since we
 572    * won't have any useful hint for our size otherwise.
 573    */
 574   if (child)
 575     gtk_widget_size_request (child, &child_requisition);
 576   else
 577     {
 578       child_requisition.width = 0;
 579       child_requisition.height = 0;
 580     }
 581
 582   if (priv->child_detached)
 583     {
 584       /* FIXME: This doesn't work currently */
 585       if (!priv->shrink_on_detach)
 586         {
 587           if (handle_position == GTK_POS_LEFT ||
 588               handle_position == GTK_POS_RIGHT)
 589             requisition->height += child_requisition.height;
 590           else
 591             requisition->width += child_requisition.width;
 592         }
 593       else
 594         {
 595           if (handle_position == GTK_POS_LEFT ||
 596               handle_position == GTK_POS_RIGHT)
 597             requisition->height += widget->style->ythickness;
 598           else
 599             requisition->width += widget->style->xthickness;
 600         }
 601     }
 602   else
 603     {
 604       guint border_width;
 605
 606       border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 607       requisition->width += border_width * 2;
 608       requisition->height += border_width * 2;
 609
 610       if (child)
 611         {
 612           requisition->width += child_requisition.width;
 613           requisition->height += child_requisition.height;
 614         }
 615       else
 616         {
 617           requisition->width += CHILDLESS_SIZE;
 618           requisition->height += CHILDLESS_SIZE;
 619         }
 620     }
 621 }
 622
 623 static void
 624 gtk_handle_box_size_allocate (GtkWidget     *widget,
 625                               GtkAllocation *allocation)
 626 {
 627   GtkBin *bin = GTK_BIN (widget);
 628   GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
 629   GtkHandleBoxPrivate *priv = hb->priv;
 630   GtkRequisition child_requisition;
 631   GtkWidget *child;
 632   gint handle_position;
 633
 634   handle_position = effective_handle_position (hb);
 635
 636   child = gtk_bin_get_child (bin);
 637
 638   if (child)
 639     gtk_widget_get_child_requisition (child, &child_requisition);
 640   else
 641     {
 642       child_requisition.width = 0;
 643       child_requisition.height = 0;
 644     }
 645
 646   widget->allocation = *allocation;
 647
 648   if (gtk_widget_get_realized (widget))
 649     gdk_window_move_resize (widget->window,
 650                             widget->allocation.x,
 651                             widget->allocation.y,
 652                             widget->allocation.width,
 653                             widget->allocation.height);
 654
 655
 656   if (child != NULL && gtk_widget_get_visible (child))
 657     {
 658       GtkAllocation child_allocation;
 659       guint border_width;
 660
 661       border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 662
 663       child_allocation.x = border_width;
 664       child_allocation.y = border_width;
 665       if (handle_position == GTK_POS_LEFT)
 666         child_allocation.x += DRAG_HANDLE_SIZE;
 667       else if (handle_position == GTK_POS_TOP)
 668         child_allocation.y += DRAG_HANDLE_SIZE;
 669
 670       if (priv->child_detached)
 671         {
 672           guint float_width;
 673           guint float_height;
 674
 675           child_allocation.width = child_requisition.width;
 676           child_allocation.height = child_requisition.height;
 677
 678           float_width = child_allocation.width + 2 * border_width;
 679           float_height = child_allocation.height + 2 * border_width;
 680
 681           if (handle_position == GTK_POS_LEFT ||
 682               handle_position == GTK_POS_RIGHT)
 683             float_width += DRAG_HANDLE_SIZE;
 684           else
 685             float_height += DRAG_HANDLE_SIZE;
 686
 687           if (gtk_widget_get_realized (widget))
 688             {
 689               gdk_window_resize (priv->float_window,
 690                                  float_width,
 691                                  float_height);
 692               gdk_window_move_resize (priv->bin_window,
 693                                       0,
 694                                       0,
 695                                       float_width,
 696                                       float_height);
 697             }
 698         }
 699       else
 700         {
 701           child_allocation.width = MAX (1, (gint)widget->allocation.width - 2 * border_width);
 702           child_allocation.height = MAX (1, (gint)widget->allocation.height - 2 * border_width);
 703
 704           if (handle_position == GTK_POS_LEFT ||
 705               handle_position == GTK_POS_RIGHT)
 706             child_allocation.width -= DRAG_HANDLE_SIZE;
 707           else
 708             child_allocation.height -= DRAG_HANDLE_SIZE;
 709
 710           if (gtk_widget_get_realized (widget))
 711             gdk_window_move_resize (priv->bin_window,
 712                                     0,
 713                                     0,
 714                                     widget->allocation.width,
 715                                     widget->allocation.height);
 716         }
 717
 718       gtk_widget_size_allocate (child, &child_allocation);
 719     }
 720 }
 721
 722 static void
 723 gtk_handle_box_draw_ghost (GtkHandleBox *hb)
 724 {
 725   GtkWidget *widget;
 726   guint x;
 727   guint y;
 728   guint width;
 729   guint height;
 730   gint handle_position;
 731
 732   widget = GTK_WIDGET (hb);
 733
 734   handle_position = effective_handle_position (hb);
 735   if (handle_position == GTK_POS_LEFT ||
 736       handle_position == GTK_POS_RIGHT)
 737     {
 738       x = handle_position == GTK_POS_LEFT ? 0 : widget->allocation.width - DRAG_HANDLE_SIZE;
 739       y = 0;
 740       width = DRAG_HANDLE_SIZE;
 741       height = widget->allocation.height;
 742     }
 743   else
 744     {
 745       x = 0;
 746       y = handle_position == GTK_POS_TOP ? 0 : widget->allocation.height - DRAG_HANDLE_SIZE;
 747       width = widget->allocation.width;
 748       height = DRAG_HANDLE_SIZE;
 749     }
 750   gtk_paint_shadow (widget->style,
 751                     widget->window,
 752                     gtk_widget_get_state (widget),
 753                     GTK_SHADOW_ETCHED_IN,
 754                     NULL, widget, "handle",
 755                     x,
 756                     y,
 757                     width,
 758                     height);
 759    if (handle_position == GTK_POS_LEFT ||
 760        handle_position == GTK_POS_RIGHT)
 761      gtk_paint_hline (widget->style,
 762                       widget->window,
 763                       gtk_widget_get_state (widget),
 764                       NULL, widget, "handlebox",
 765                       handle_position == GTK_POS_LEFT ? DRAG_HANDLE_SIZE : 0,
 766                       handle_position == GTK_POS_LEFT ? widget->allocation.width : widget->allocation.width - DRAG_HANDLE_SIZE,
 767                       widget->allocation.height / 2);
 768    else
 769      gtk_paint_vline (widget->style,
 770                       widget->window,
 771                       gtk_widget_get_state (widget),
 772                       NULL, widget, "handlebox",
 773                       handle_position == GTK_POS_TOP ? DRAG_HANDLE_SIZE : 0,
 774                       handle_position == GTK_POS_TOP ? widget->allocation.height : widget->allocation.height - DRAG_HANDLE_SIZE,
 775                       widget->allocation.width / 2);
 776 }
 777
 778 static void
 779 draw_textured_frame (GtkWidget *widget, GdkWindow *window, GdkRectangle *rect, GtkShadowType shadow,
 780                      GdkRectangle *clip, GtkOrientation orientation)
 781 {
 782    gtk_paint_handle (widget->style, window, GTK_STATE_NORMAL, shadow,
 783                      clip, widget, "handlebox",
 784                      rect->x, rect->y, rect->width, rect->height,
 785                      orientation);
 786 }
 787
 788 void
 789 gtk_handle_box_set_shadow_type (GtkHandleBox  *handle_box,
 790                                 GtkShadowType  type)
 791 {
 792   GtkHandleBoxPrivate *priv;
 793
 794   g_return_if_fail (GTK_IS_HANDLE_BOX (handle_box));
 795
 796   priv = handle_box->priv;
 797
 798   if ((GtkShadowType) priv->shadow_type != type)
 799     {
 800       priv->shadow_type = type;
 801       g_object_notify (G_OBJECT (handle_box), "shadow-type");
 802       gtk_widget_queue_resize (GTK_WIDGET (handle_box));
 803     }
 804 }
 805
 806 /**
 807  * gtk_handle_box_get_shadow_type:
 808  * @handle_box: a #GtkHandleBox
 809  *
 810  * Gets the type of shadow drawn around the handle box. See
 811  * gtk_handle_box_set_shadow_type().
 812  *
 813  * Return value: the type of shadow currently drawn around the handle box.
 814  **/
 815 GtkShadowType
 816 gtk_handle_box_get_shadow_type (GtkHandleBox *handle_box)
 817 {
 818   g_return_val_if_fail (GTK_IS_HANDLE_BOX (handle_box), GTK_SHADOW_ETCHED_OUT);
 819
 820   return handle_box->priv->shadow_type;
 821 }
 822
 823 void
 824 gtk_handle_box_set_handle_position  (GtkHandleBox    *handle_box,
 825                                      GtkPositionType  position)
 826 {
 827   GtkHandleBoxPrivate *priv;
 828
 829   g_return_if_fail (GTK_IS_HANDLE_BOX (handle_box));
 830
 831   priv = handle_box->priv;
 832
 833   if ((GtkPositionType) priv->handle_position != position)
 834     {
 835       priv->handle_position = position;
 836       g_object_notify (G_OBJECT (handle_box), "handle-position");
 837       gtk_widget_queue_resize (GTK_WIDGET (handle_box));
 838     }
 839 }
 840
 841 /**
 842  * gtk_handle_box_get_handle_position:
 843  * @handle_box: a #GtkHandleBox
 844  *
 845  * Gets the handle position of the handle box. See
 846  * gtk_handle_box_set_handle_position().
 847  *
 848  * Return value: the current handle position.
 849  **/
 850 GtkPositionType
 851 gtk_handle_box_get_handle_position (GtkHandleBox *handle_box)
 852 {
 853   g_return_val_if_fail (GTK_IS_HANDLE_BOX (handle_box), GTK_POS_LEFT);
 854
 855   return handle_box->priv->handle_position;
 856 }
 857
 858 void
 859 gtk_handle_box_set_snap_edge        (GtkHandleBox    *handle_box,
 860                                      GtkPositionType  edge)
 861 {
 862   GtkHandleBoxPrivate *priv;
 863
 864   g_return_if_fail (GTK_IS_HANDLE_BOX (handle_box));
 865
 866   priv = handle_box->priv;
 867
 868   if (priv->snap_edge != edge)
 869     {
 870       priv->snap_edge = edge;
 871
 872       g_object_freeze_notify (G_OBJECT (handle_box));
 873       g_object_notify (G_OBJECT (handle_box), "snap-edge");
 874       g_object_notify (G_OBJECT (handle_box), "snap-edge-set");
 875       g_object_thaw_notify (G_OBJECT (handle_box));
 876     }
 877 }
 878
 879 /**
 880  * gtk_handle_box_get_snap_edge:
 881  * @handle_box: a #GtkHandleBox
 882  *
 883  * Gets the edge used for determining reattachment of the handle box. See
 884  * gtk_handle_box_set_snap_edge().
 885  *
 886  * Return value: the edge used for determining reattachment, or (GtkPositionType)-1 if this
 887  *               is determined (as per default) from the handle position.
 888  **/
 889 GtkPositionType
 890 gtk_handle_box_get_snap_edge (GtkHandleBox *handle_box)
 891 {
 892   g_return_val_if_fail (GTK_IS_HANDLE_BOX (handle_box), (GtkPositionType)-1);
 893
 894   return handle_box->priv->snap_edge;
 895 }
 896
 897 /**
 898  * gtk_handle_box_get_child_detached:
 899  * @handle_box: a #GtkHandleBox
 900  *
 901  * Whether the handlebox's child is currently detached.
 902  *
 903  * Return value: %TRUE if the child is currently detached, otherwise %FALSE
 904  *
 905  * Since: 2.14
 906  **/
 907 gboolean
 908 gtk_handle_box_get_child_detached (GtkHandleBox *handle_box)
 909 {
 910   g_return_val_if_fail (GTK_IS_HANDLE_BOX (handle_box), FALSE);
 911
 912   return handle_box->priv->child_detached;
 913 }
 914
 915 static void
 916 gtk_handle_box_paint (GtkWidget      *widget,
 917                       GdkEventExpose *event,
 918                       GdkRectangle   *area)
 919 {
 920   GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
 921   GtkHandleBoxPrivate *priv = hb->priv;
 922   GtkBin *bin = GTK_BIN (widget);
 923   GtkWidget *child;
 924   gint width, height;
 925   GdkRectangle rect;
 926   GdkRectangle dest;
 927   gint handle_position;
 928   GtkOrientation handle_orientation;
 929
 930   handle_position = effective_handle_position (hb);
 931
 932   gdk_drawable_get_size (priv->bin_window, &width, &height);
 933
 934   if (!event)
 935     gtk_paint_box (widget->style,
 936                    priv->bin_window,
 937                    gtk_widget_get_state (widget),
 938                    priv->shadow_type,
 939                    area, widget, "handlebox_bin",
 940                    0, 0, -1, -1);
 941   else
 942    gtk_paint_box (widget->style,
 943                   priv->bin_window,
 944                   gtk_widget_get_state (widget),
 945                   priv->shadow_type,
 946                   &event->area, widget, "handlebox_bin",
 947                   0, 0, -1, -1);
 948
 949 /* We currently draw the handle _above_ the relief of the handlebox.
 950  * it could also be drawn on the same level...
 951
 952                  priv->handle_position == GTK_POS_LEFT ? DRAG_HANDLE_SIZE : 0,
 953                  priv->handle_position == GTK_POS_TOP ? DRAG_HANDLE_SIZE : 0,
 954                  width,
 955                  height);*/
 956
 957   switch (handle_position)
 958     {
 959     case GTK_POS_LEFT:
 960       rect.x = 0;
 961       rect.y = 0;
 962       rect.width = DRAG_HANDLE_SIZE;
 963       rect.height = height;
 964       handle_orientation = GTK_ORIENTATION_VERTICAL;
 965       break;
 966     case GTK_POS_RIGHT:
 967       rect.x = width - DRAG_HANDLE_SIZE;
 968       rect.y = 0;
 969       rect.width = DRAG_HANDLE_SIZE;
 970       rect.height = height;
 971       handle_orientation = GTK_ORIENTATION_VERTICAL;
 972       break;
 973     case GTK_POS_TOP:
 974       rect.x = 0;
 975       rect.y = 0;
 976       rect.width = width;
 977       rect.height = DRAG_HANDLE_SIZE;
 978       handle_orientation = GTK_ORIENTATION_HORIZONTAL;
 979       break;
 980     case GTK_POS_BOTTOM:
 981       rect.x = 0;
 982       rect.y = height - DRAG_HANDLE_SIZE;
 983       rect.width = width;
 984       rect.height = DRAG_HANDLE_SIZE;
 985       handle_orientation = GTK_ORIENTATION_HORIZONTAL;
 986       break;
 987     default:
 988       g_assert_not_reached ();
 989       break;
 990     }
 991
 992   if (gdk_rectangle_intersect (event ? &event->area : area, &rect, &dest))
 993     draw_textured_frame (widget, priv->bin_window, &rect,
 994                          GTK_SHADOW_OUT,
 995                          event ? &event->area : area,
 996                          handle_orientation);
 997
 998   child = gtk_bin_get_child (bin);
 999   if (child != NULL && gtk_widget_get_visible (child))
1000     GTK_WIDGET_CLASS (gtk_handle_box_parent_class)->expose_event (widget, event);
1001 }
1002
1003 static gboolean
1004 gtk_handle_box_expose (GtkWidget      *widget,
1005                        GdkEventExpose *event)
1006 {
1007   GtkHandleBox *hb;
1008   GtkHandleBoxPrivate *priv;
1009
1010   if (gtk_widget_is_drawable (widget))
1011     {
1012       hb = GTK_HANDLE_BOX (widget);
1013       priv = hb->priv;
1014
1015       if (event->window == widget->window)
1016         {
1017           if (priv->child_detached)
1018             gtk_handle_box_draw_ghost (hb);
1019         }
1020       else
1021         gtk_handle_box_paint (widget, event, NULL);
1022     }
1023
1024   return FALSE;
1025 }
1026
1027 static GtkWidget *
1028 gtk_handle_box_get_invisible (void)
1029 {
1030   static GtkWidget *handle_box_invisible = NULL;
1031
1032   if (!handle_box_invisible)
1033     {
1034       handle_box_invisible = gtk_invisible_new ();
1035       gtk_widget_show (handle_box_invisible);
1036     }
1037
1038   return handle_box_invisible;
1039 }
1040
1041 static gboolean
1042 gtk_handle_box_grab_event (GtkWidget    *widget,
1043                            GdkEvent     *event,
1044                            GtkHandleBox *hb)
1045 {
1046   GtkHandleBoxPrivate *priv = hb->priv;
1047
1048   switch (event->type)
1049     {
1050     case GDK_BUTTON_RELEASE:
1051       if (priv->in_drag)                /* sanity check */
1052         {
1053           gtk_handle_box_end_drag (hb, event->button.time);
1054           return TRUE;
1055         }
1056       break;
1057
1058     case GDK_MOTION_NOTIFY:
1059       return gtk_handle_box_motion (GTK_WIDGET (hb), (GdkEventMotion *)event);
1060       break;
1061
1062     default:
1063       break;
1064     }
1065
1066   return FALSE;
1067 }
1068
1069 static gboolean
1070 gtk_handle_box_button_press (GtkWidget      *widget,
1071                              GdkEventButton *event)
1072 {
1073   GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
1074   GtkHandleBoxPrivate *priv = hb->priv;
1075   gboolean event_handled;
1076   GdkCursor *fleur;
1077   gint handle_position;
1078
1079   handle_position = effective_handle_position (hb);
1080
1081   event_handled = FALSE;
1082   if ((event->button == 1) &&
1083       (event->type == GDK_BUTTON_PRESS || event->type == GDK_2BUTTON_PRESS))
1084     {
1085       GtkWidget *child;
1086       gboolean in_handle;
1087
1088       if (event->window != priv->bin_window)
1089         return FALSE;
1090
1091       child = gtk_bin_get_child (GTK_BIN (hb));
1092
1093       if (child)
1094         {
1095           guint border_width;
1096
1097           border_width = gtk_container_get_border_width (GTK_CONTAINER (hb));
1098
1099           switch (handle_position)
1100             {
1101             case GTK_POS_LEFT:
1102               in_handle = event->x < DRAG_HANDLE_SIZE;
1103               break;
1104             case GTK_POS_TOP:
1105               in_handle = event->y < DRAG_HANDLE_SIZE;
1106               break;
1107             case GTK_POS_RIGHT:
1108               in_handle = event->x > 2 * border_width + child->allocation.width;
1109               break;
1110             case GTK_POS_BOTTOM:
1111               in_handle = event->y > 2 * border_width + child->allocation.height;
1112               break;
1113             default:
1114               in_handle = FALSE;
1115               break;
1116             }
1117         }
1118       else
1119         {
1120           in_handle = FALSE;
1121           event_handled = TRUE;
1122         }
1123
1124       if (in_handle)
1125         {
1126           if (event->type == GDK_BUTTON_PRESS) /* Start a drag */
1127             {
1128               GtkWidget *invisible = gtk_handle_box_get_invisible ();
1129               gint desk_x, desk_y;
1130               gint root_x, root_y;
1131               gint width, height;
1132
1133               gtk_invisible_set_screen (GTK_INVISIBLE (invisible),
1134                                         gtk_widget_get_screen (GTK_WIDGET (hb)));
1135               gdk_window_get_deskrelative_origin (priv->bin_window, &desk_x, &desk_y);
1136               gdk_window_get_origin (priv->bin_window, &root_x, &root_y);
1137               gdk_drawable_get_size (priv->bin_window, &width, &height);
1138
1139               priv->orig_x = event->x_root;
1140               priv->orig_y = event->y_root;
1141
1142               priv->float_allocation.x = root_x - event->x_root;
1143               priv->float_allocation.y = root_y - event->y_root;
1144               priv->float_allocation.width = width;
1145               priv->float_allocation.height = height;
1146
1147               priv->deskoff_x = desk_x - root_x;
1148               priv->deskoff_y = desk_y - root_y;
1149
1150               if (gdk_window_is_viewable (widget->window))
1151                 {
1152                   gdk_window_get_origin (widget->window, &root_x, &root_y);
1153                   gdk_drawable_get_size (widget->window, &width, &height);
1154
1155                   priv->attach_allocation.x = root_x;
1156                   priv->attach_allocation.y = root_y;
1157                   priv->attach_allocation.width = width;
1158                   priv->attach_allocation.height = height;
1159                 }
1160               else
1161                 {
1162                   priv->attach_allocation.x = -1;
1163                   priv->attach_allocation.y = -1;
1164                   priv->attach_allocation.width = 0;
1165                   priv->attach_allocation.height = 0;
1166                 }
1167               priv->in_drag = TRUE;
1168               priv->grab_device = event->device;
1169               fleur = gdk_cursor_new_for_display (gtk_widget_get_display (widget),
1170                                                   GDK_FLEUR);
1171               if (gdk_device_grab (event->device,
1172                                    invisible->window,
1173                                    GDK_OWNERSHIP_WINDOW,
1174                                    FALSE,
1175                                    (GDK_BUTTON1_MOTION_MASK |
1176                                     GDK_POINTER_MOTION_HINT_MASK |
1177                                     GDK_BUTTON_RELEASE_MASK),
1178                                    fleur,
1179                                    event->time) != GDK_GRAB_SUCCESS)
1180                 {
1181                   priv->in_drag = FALSE;
1182                   priv->grab_device = NULL;
1183                 }
1184               else
1185                 {
1186                   gtk_device_grab_add (invisible, priv->grab_device, TRUE);
1187                   g_signal_connect (invisible, "event",
1188                                     G_CALLBACK (gtk_handle_box_grab_event), hb);
1189                 }
1190
1191               gdk_cursor_unref (fleur);
1192               event_handled = TRUE;
1193             }
1194           else if (priv->child_detached) /* Double click */
1195             {
1196               gtk_handle_box_reattach (hb);
1197             }
1198         }
1199     }
1200
1201   return event_handled;
1202 }
1203
1204 static gboolean
1205 gtk_handle_box_motion (GtkWidget      *widget,
1206                        GdkEventMotion *event)
1207 {
1208   GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
1209   GtkHandleBoxPrivate *priv = hb->priv;
1210   GtkWidget *child;
1211   gint new_x, new_y;
1212   gint snap_edge;
1213   gboolean is_snapped = FALSE;
1214   gint handle_position;
1215   GdkGeometry geometry;
1216   GdkScreen *screen, *pointer_screen;
1217
1218   if (!priv->in_drag)
1219     return FALSE;
1220   handle_position = effective_handle_position (hb);
1221
1222   /* Calculate the attachment point on the float, if the float
1223    * were detached
1224    */
1225   new_x = 0;
1226   new_y = 0;
1227   screen = gtk_widget_get_screen (widget);
1228   gdk_display_get_device_state (gdk_screen_get_display (screen),
1229                                 event->device,
1230                                 &pointer_screen,
1231                                 &new_x, &new_y, NULL);
1232   if (pointer_screen != screen)
1233     {
1234       new_x = priv->orig_x;
1235       new_y = priv->orig_y;
1236     }
1237
1238   new_x += priv->float_allocation.x;
1239   new_y += priv->float_allocation.y;
1240
1241   snap_edge = priv->snap_edge;
1242   if (snap_edge == -1)
1243     snap_edge = (handle_position == GTK_POS_LEFT ||
1244                  handle_position == GTK_POS_RIGHT) ?
1245       GTK_POS_TOP : GTK_POS_LEFT;
1246
1247   if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
1248     switch (snap_edge)
1249       {
1250       case GTK_POS_LEFT:
1251         snap_edge = GTK_POS_RIGHT;
1252         break;
1253       case GTK_POS_RIGHT:
1254         snap_edge = GTK_POS_LEFT;
1255         break;
1256       default:
1257         break;
1258       }
1259
1260   /* First, check if the snapped edge is aligned
1261    */
1262   switch (snap_edge)
1263     {
1264     case GTK_POS_TOP:
1265       is_snapped = abs (priv->attach_allocation.y - new_y) < TOLERANCE;
1266       break;
1267     case GTK_POS_BOTTOM:
1268       is_snapped = abs (priv->attach_allocation.y + (gint)priv->attach_allocation.height -
1269                         new_y - (gint)priv->float_allocation.height) < TOLERANCE;
1270       break;
1271     case GTK_POS_LEFT:
1272       is_snapped = abs (priv->attach_allocation.x - new_x) < TOLERANCE;
1273       break;
1274     case GTK_POS_RIGHT:
1275       is_snapped = abs (priv->attach_allocation.x + (gint)priv->attach_allocation.width -
1276                         new_x - (gint)priv->float_allocation.width) < TOLERANCE;
1277       break;
1278     }
1279
1280   /* Next, check if coordinates in the other direction are sufficiently
1281    * aligned
1282    */
1283   if (is_snapped)
1284     {
1285       gint float_pos1 = 0;      /* Initialize to suppress warnings */
1286       gint float_pos2 = 0;
1287       gint attach_pos1 = 0;
1288       gint attach_pos2 = 0;
1289
1290       switch (snap_edge)
1291         {
1292         case GTK_POS_TOP:
1293         case GTK_POS_BOTTOM:
1294           attach_pos1 = priv->attach_allocation.x;
1295           attach_pos2 = priv->attach_allocation.x + priv->attach_allocation.width;
1296           float_pos1 = new_x;
1297           float_pos2 = new_x + priv->float_allocation.width;
1298           break;
1299         case GTK_POS_LEFT:
1300         case GTK_POS_RIGHT:
1301           attach_pos1 = priv->attach_allocation.y;
1302           attach_pos2 = priv->attach_allocation.y + priv->attach_allocation.height;
1303           float_pos1 = new_y;
1304           float_pos2 = new_y + priv->float_allocation.height;
1305           break;
1306         }
1307
1308       is_snapped = ((attach_pos1 - TOLERANCE < float_pos1) &&
1309                     (attach_pos2 + TOLERANCE > float_pos2)) ||
1310                    ((float_pos1 - TOLERANCE < attach_pos1) &&
1311                     (float_pos2 + TOLERANCE > attach_pos2));
1312     }
1313
1314   child = gtk_bin_get_child (GTK_BIN (hb));
1315
1316   if (is_snapped)
1317     {
1318       if (priv->child_detached)
1319         {
1320           priv->child_detached = FALSE;
1321           gdk_window_hide (priv->float_window);
1322           gdk_window_reparent (priv->bin_window, widget->window, 0, 0);
1323           priv->float_window_mapped = FALSE;
1324           g_signal_emit (hb,
1325                          handle_box_signals[SIGNAL_CHILD_ATTACHED],
1326                          0,
1327                          child);
1328
1329           gtk_widget_queue_resize (widget);
1330         }
1331     }
1332   else
1333     {
1334       gint width, height;
1335
1336       gdk_drawable_get_size (priv->float_window, &width, &height);
1337       new_x += priv->deskoff_x;
1338       new_y += priv->deskoff_y;
1339
1340       switch (handle_position)
1341         {
1342         case GTK_POS_LEFT:
1343           new_y += ((gint)priv->float_allocation.height - height) / 2;
1344           break;
1345         case GTK_POS_RIGHT:
1346           new_x += (gint)priv->float_allocation.width - width;
1347           new_y += ((gint)priv->float_allocation.height - height) / 2;
1348           break;
1349         case GTK_POS_TOP:
1350           new_x += ((gint)priv->float_allocation.width - width) / 2;
1351           break;
1352         case GTK_POS_BOTTOM:
1353           new_x += ((gint)priv->float_allocation.width - width) / 2;
1354           new_y += (gint)priv->float_allocation.height - height;
1355           break;
1356         }
1357
1358       if (priv->child_detached)
1359         {
1360           gdk_window_move (priv->float_window, new_x, new_y);
1361           gdk_window_raise (priv->float_window);
1362         }
1363       else
1364         {
1365           gint width;
1366           gint height;
1367           guint border_width;
1368           GtkRequisition child_requisition;
1369
1370           priv->child_detached = TRUE;
1371
1372           if (child)
1373             gtk_widget_get_child_requisition (child, &child_requisition);
1374           else
1375             {
1376               child_requisition.width = 0;
1377               child_requisition.height = 0;
1378             }
1379
1380           border_width = gtk_container_get_border_width (GTK_CONTAINER (hb));
1381           width = child_requisition.width + 2 * border_width;
1382           height = child_requisition.height + 2 * border_width;
1383
1384           if (handle_position == GTK_POS_LEFT || handle_position == GTK_POS_RIGHT)
1385             width += DRAG_HANDLE_SIZE;
1386           else
1387             height += DRAG_HANDLE_SIZE;
1388
1389           gdk_window_move_resize (priv->float_window, new_x, new_y, width, height);
1390           gdk_window_reparent (priv->bin_window, priv->float_window, 0, 0);
1391           gdk_window_set_geometry_hints (priv->float_window, &geometry, GDK_HINT_POS);
1392           gdk_window_show (priv->float_window);
1393           priv->float_window_mapped = TRUE;
1394 #if     0
1395           /* this extra move is necessary if we use decorations, or our
1396            * window manager insists on decorations.
1397            */
1398           gdk_display_sync (gtk_widget_get_display (widget));
1399           gdk_window_move (priv->float_window, new_x, new_y);
1400           gdk_display_sync (gtk_widget_get_display (widget));
1401 #endif  /* 0 */
1402           g_signal_emit (hb,
1403                          handle_box_signals[SIGNAL_CHILD_DETACHED],
1404                          0,
1405                          child);
1406           gtk_handle_box_draw_ghost (hb);
1407
1408           gtk_widget_queue_resize (widget);
1409         }
1410     }
1411
1412   return TRUE;
1413 }
1414
1415 static void
1416 gtk_handle_box_add (GtkContainer *container,
1417                     GtkWidget    *widget)
1418 {
1419   GtkHandleBoxPrivate *priv = GTK_HANDLE_BOX (container)->priv;
1420
1421   gtk_widget_set_parent_window (widget, priv->bin_window);
1422   GTK_CONTAINER_CLASS (gtk_handle_box_parent_class)->add (container, widget);
1423 }
1424
1425 static void
1426 gtk_handle_box_remove (GtkContainer *container,
1427                        GtkWidget    *widget)
1428 {
1429   GTK_CONTAINER_CLASS (gtk_handle_box_parent_class)->remove (container, widget);
1430
1431   gtk_handle_box_reattach (GTK_HANDLE_BOX (container));
1432 }
1433
1434 static gint
1435 gtk_handle_box_delete_event (GtkWidget *widget,
1436                              GdkEventAny  *event)
1437 {
1438   GtkHandleBox *hb = GTK_HANDLE_BOX (widget);
1439   GtkHandleBoxPrivate *priv = hb->priv;
1440
1441   if (event->window == priv->float_window)
1442     {
1443       gtk_handle_box_reattach (hb);
1444
1445       return TRUE;
1446     }
1447
1448   return FALSE;
1449 }
1450
1451 static void
1452 gtk_handle_box_reattach (GtkHandleBox *hb)
1453 {
1454   GtkHandleBoxPrivate *priv = hb->priv;
1455   GtkWidget *child;
1456   GtkWidget *widget = GTK_WIDGET (hb);
1457
1458   if (priv->child_detached)
1459     {
1460       priv->child_detached = FALSE;
1461       if (gtk_widget_get_realized (widget))
1462         {
1463           gdk_window_hide (priv->float_window);
1464           gdk_window_reparent (priv->bin_window, widget->window, 0, 0);
1465
1466           child = gtk_bin_get_child (GTK_BIN (hb));
1467           if (child)
1468             g_signal_emit (hb,
1469                            handle_box_signals[SIGNAL_CHILD_ATTACHED],
1470                            0,
1471                            child);
1472
1473         }
1474       priv->float_window_mapped = FALSE;
1475     }
1476   if (priv->in_drag)
1477     gtk_handle_box_end_drag (hb, GDK_CURRENT_TIME);
1478
1479   gtk_widget_queue_resize (GTK_WIDGET (hb));
1480 }
1481
1482 static void
1483 gtk_handle_box_end_drag (GtkHandleBox *hb,
1484                          guint32       time)
1485 {
1486   GtkHandleBoxPrivate *priv = hb->priv;
1487   GtkWidget *invisible = gtk_handle_box_get_invisible ();
1488
1489   priv->in_drag = FALSE;
1490
1491   gtk_device_grab_remove (invisible, priv->grab_device);
1492   gdk_device_ungrab (priv->grab_device, time);
1493   g_signal_handlers_disconnect_by_func (invisible,
1494                                         G_CALLBACK (gtk_handle_box_grab_event),
1495                                         hb);
1496
1497   priv->grab_device = NULL;
1498 }