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 Library 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  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public
  16  * License along with this library; if not, write to the Free
  17  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20
  21 #include <stdlib.h>
  22 #include "gdk/gdkx.h"
  23 #include "gtkhandlebox.h"
  24 #include "gtkmain.h"
  25 #include "gtksignal.h"
  26 #include "gtkwindow.h"
  27
  28
  29 #define DRAG_HANDLE_SIZE 10
  30 #define CHILDLESS_SIZE  25
  31 #define GHOST_HEIGHT 3
  32
  33 enum
  34 {
  35   SIGNAL_CHILD_ATTACHED,
  36   SIGNAL_CHILD_DETACHED,
  37   SIGNAL_LAST
  38 };
  39
  40 typedef void    (*SignalChildAttached)          (GtkObject      *object,
  41                                                  GtkWidget      *widget,
  42                                                  gpointer        func_data);
  43
  44 static void gtk_handle_box_class_init     (GtkHandleBoxClass *klass);
  45 static void gtk_handle_box_init           (GtkHandleBox      *handle_box);
  46 static void gtk_handle_box_destroy        (GtkObject         *object);
  47 static void gtk_handle_box_map            (GtkWidget         *widget);
  48 static void gtk_handle_box_unmap          (GtkWidget         *widget);
  49 static void gtk_handle_box_realize        (GtkWidget         *widget);
  50 static void gtk_handle_box_unrealize      (GtkWidget         *widget);
  51 static void gtk_handle_box_size_request   (GtkWidget         *widget,
  52                                            GtkRequisition    *requisition);
  53 static void gtk_handle_box_size_allocate  (GtkWidget         *widget,
  54                                            GtkAllocation     *real_allocation);
  55 static void gtk_handle_box_add            (GtkContainer      *container,
  56                                            GtkWidget         *widget);
  57 static void gtk_handle_box_remove         (GtkContainer      *container,
  58                                            GtkWidget         *widget);
  59 static void gtk_handle_box_draw_ghost     (GtkHandleBox      *hb);
  60 static void gtk_handle_box_paint          (GtkWidget         *widget,
  61                                            GdkEventExpose    *event,
  62                                            GdkRectangle      *area);
  63 static void gtk_handle_box_draw           (GtkWidget         *widget,
  64                                            GdkRectangle      *area);
  65 static gint gtk_handle_box_expose         (GtkWidget         *widget,
  66                                            GdkEventExpose    *event);
  67 static gint gtk_handle_box_button_changed (GtkWidget         *widget,
  68                                            GdkEventButton    *event);
  69 static gint gtk_handle_box_motion         (GtkWidget         *widget,
  70                                            GdkEventMotion    *event);
  71 static gint gtk_handle_box_delete_event   (GtkWidget         *widget,
  72                                            GdkEventAny       *event);
  73
  74
  75 static GtkBinClass *parent_class;
  76 static guint        handle_box_signals[SIGNAL_LAST] = { 0 };
  77
  78
  79 guint
  80 gtk_handle_box_get_type (void)
  81 {
  82   static guint handle_box_type = 0;
  83
  84   if (!handle_box_type)
  85     {
  86       GtkTypeInfo handle_box_info =
  87       {
  88         "GtkHandleBox",
  89         sizeof (GtkHandleBox),
  90         sizeof (GtkHandleBoxClass),
  91         (GtkClassInitFunc) gtk_handle_box_class_init,
  92         (GtkObjectInitFunc) gtk_handle_box_init,
  93         (GtkArgSetFunc) NULL,
  94         (GtkArgGetFunc) NULL,
  95       };
  96
  97       handle_box_type = gtk_type_unique (gtk_bin_get_type (), &handle_box_info);
  98     }
  99
 100   return handle_box_type;
 101 }
 102
 103 static void
 104 gtk_handle_box_marshal_child_attached (GtkObject      *object,
 105                                        GtkSignalFunc  func,
 106                                        gpointer       func_data,
 107                                        GtkArg         *args)
 108 {
 109   SignalChildAttached sfunc = (SignalChildAttached) func;
 110
 111   (* sfunc) (object,
 112              (GtkWidget*) GTK_VALUE_OBJECT (args[0]),
 113              func_data);
 114 }
 115
 116 static void
 117 gtk_handle_box_class_init (GtkHandleBoxClass *class)
 118 {
 119   GtkObjectClass *object_class;
 120   GtkWidgetClass *widget_class;
 121   GtkContainerClass *container_class;
 122
 123   object_class = (GtkObjectClass *) class;
 124   widget_class = (GtkWidgetClass *) class;
 125   container_class = (GtkContainerClass *) class;
 126
 127   parent_class = gtk_type_class (gtk_bin_get_type ());
 128
 129   handle_box_signals[SIGNAL_CHILD_ATTACHED] =
 130     gtk_signal_new ("child_attached",
 131                     GTK_RUN_FIRST,
 132                     object_class->type,
 133                     GTK_SIGNAL_OFFSET (GtkHandleBoxClass, child_attached),
 134                     gtk_handle_box_marshal_child_attached,
 135                     GTK_TYPE_NONE, 1,
 136                     GTK_TYPE_WIDGET);
 137   handle_box_signals[SIGNAL_CHILD_DETACHED] =
 138     gtk_signal_new ("child_detached",
 139                     GTK_RUN_FIRST,
 140                     object_class->type,
 141                     GTK_SIGNAL_OFFSET (GtkHandleBoxClass, child_detached),
 142                     gtk_handle_box_marshal_child_attached,
 143                     GTK_TYPE_NONE, 1,
 144                     GTK_TYPE_WIDGET);
 145   gtk_object_class_add_signals (object_class, handle_box_signals, SIGNAL_LAST);
 146
 147   object_class->destroy = gtk_handle_box_destroy;
 148
 149   widget_class->map = gtk_handle_box_map;
 150   widget_class->unmap = gtk_handle_box_unmap;
 151   widget_class->realize = gtk_handle_box_realize;
 152   widget_class->unrealize = gtk_handle_box_unrealize;
 153   widget_class->size_request = gtk_handle_box_size_request;
 154   widget_class->size_allocate = gtk_handle_box_size_allocate;
 155   widget_class->draw = gtk_handle_box_draw;
 156   widget_class->expose_event = gtk_handle_box_expose;
 157   widget_class->button_press_event = gtk_handle_box_button_changed;
 158   widget_class->button_release_event = gtk_handle_box_button_changed;
 159   widget_class->motion_notify_event = gtk_handle_box_motion;
 160   widget_class->delete_event = gtk_handle_box_delete_event;
 161
 162   container_class->add = gtk_handle_box_add;
 163   container_class->remove = gtk_handle_box_remove;
 164
 165   class->child_attached = NULL;
 166   class->child_detached = NULL;
 167 }
 168
 169 static void
 170 gtk_handle_box_init (GtkHandleBox *handle_box)
 171 {
 172   GTK_WIDGET_UNSET_FLAGS (handle_box, GTK_NO_WINDOW);
 173   GTK_WIDGET_SET_FLAGS (handle_box, GTK_BASIC); /* FIXME: are we really a basic widget? */
 174
 175   handle_box->bin_window = NULL;
 176   handle_box->float_window = NULL;
 177   handle_box->handle_position = GTK_POS_LEFT;
 178   handle_box->float_window_mapped = FALSE;
 179   handle_box->child_detached = FALSE;
 180   handle_box->in_drag = FALSE;
 181   handle_box->shrink_on_detach = TRUE;
 182   handle_box->fleur_cursor = gdk_cursor_new (GDK_FLEUR);
 183   handle_box->dragoff_x = 0;
 184   handle_box->dragoff_y = 0;
 185 }
 186
 187 GtkWidget*
 188 gtk_handle_box_new (void)
 189 {
 190   return GTK_WIDGET (gtk_type_new (gtk_handle_box_get_type ()));
 191 }
 192
 193 static void
 194 gtk_handle_box_destroy (GtkObject *object)
 195 {
 196   GtkHandleBox *hb;
 197
 198   g_return_if_fail (object != NULL);
 199   g_return_if_fail (GTK_IS_HANDLE_BOX (object));
 200
 201   hb = GTK_HANDLE_BOX (object);
 202
 203   if (GTK_OBJECT_CLASS (parent_class)->destroy)
 204     (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
 205 }
 206
 207 static void
 208 gtk_handle_box_map (GtkWidget *widget)
 209 {
 210   GtkBin *bin;
 211   GtkHandleBox *hb;
 212
 213   g_return_if_fail (widget != NULL);
 214   g_return_if_fail (GTK_IS_HANDLE_BOX (widget));
 215
 216   GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
 217
 218   bin = GTK_BIN (widget);
 219   hb = GTK_HANDLE_BOX (widget);
 220
 221   gdk_window_show (hb->bin_window);
 222   gdk_window_show (widget->window);
 223
 224   if (hb->child_detached && !hb->float_window_mapped)
 225     {
 226       gdk_window_show (hb->float_window);
 227       hb->float_window_mapped = TRUE;
 228     }
 229
 230   if (bin->child &&
 231       GTK_WIDGET_VISIBLE (bin->child) &&
 232       !GTK_WIDGET_MAPPED (bin->child))
 233     gtk_widget_map (bin->child);
 234 }
 235
 236 static void
 237 gtk_handle_box_unmap (GtkWidget *widget)
 238 {
 239   GtkHandleBox *hb;
 240
 241   g_return_if_fail (widget != NULL);
 242   g_return_if_fail (GTK_IS_HANDLE_BOX (widget));
 243
 244   GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
 245
 246   hb = GTK_HANDLE_BOX (widget);
 247
 248   gdk_window_hide (widget->window);
 249   if (hb->float_window_mapped)
 250     {
 251       gdk_window_hide (hb->float_window);
 252       hb->float_window_mapped = FALSE;
 253     }
 254 }
 255
 256 static void
 257 gtk_handle_box_realize (GtkWidget *widget)
 258 {
 259   GdkWindowAttr attributes;
 260   gint attributes_mask;
 261   GtkHandleBox *hb;
 262
 263   g_return_if_fail (widget != NULL);
 264   g_return_if_fail (GTK_IS_HANDLE_BOX (widget));
 265
 266   hb = GTK_HANDLE_BOX (widget);
 267
 268   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 269
 270   attributes.x = widget->allocation.x;
 271   attributes.y = widget->allocation.y;
 272   attributes.width = widget->allocation.width;
 273   attributes.height = widget->allocation.height;
 274   attributes.window_type = GDK_WINDOW_CHILD;
 275   attributes.wclass = GDK_INPUT_OUTPUT;
 276   attributes.visual = gtk_widget_get_visual (widget);
 277   attributes.colormap = gtk_widget_get_colormap (widget);
 278   attributes.event_mask = (gtk_widget_get_events (widget)
 279                            | GDK_EXPOSURE_MASK);
 280   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 281   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 282   gdk_window_set_user_data (widget->window, widget);
 283
 284   attributes.x = 0;
 285   attributes.y = 0;
 286   attributes.width = widget->allocation.width;
 287   attributes.height = widget->allocation.height;
 288   attributes.window_type = GDK_WINDOW_CHILD;
 289   attributes.event_mask |= (gtk_widget_get_events (widget) |
 290                             GDK_EXPOSURE_MASK |
 291                             GDK_BUTTON1_MOTION_MASK |
 292                             GDK_POINTER_MOTION_HINT_MASK |
 293                             GDK_BUTTON_PRESS_MASK |
 294                             GDK_BUTTON_RELEASE_MASK);
 295   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 296   hb->bin_window = gdk_window_new (widget->window, &attributes, attributes_mask);
 297   gdk_window_set_user_data (hb->bin_window, widget);
 298   if (GTK_BIN (hb)->child)
 299     gtk_widget_set_parent_window (GTK_BIN (hb)->child, hb->bin_window);
 300
 301   attributes.x = 0;
 302   attributes.y = 0;
 303   attributes.width = widget->requisition.width;
 304   attributes.height = widget->requisition.height;
 305   attributes.window_type = GDK_WINDOW_TOPLEVEL;
 306   attributes.wclass = GDK_INPUT_OUTPUT;
 307   attributes.visual = gtk_widget_get_visual (widget);
 308   attributes.colormap = gtk_widget_get_colormap (widget);
 309   attributes.event_mask = (gtk_widget_get_events (widget) |
 310                            GDK_KEY_PRESS_MASK |
 311                            GDK_ENTER_NOTIFY_MASK |
 312                            GDK_LEAVE_NOTIFY_MASK |
 313                            GDK_FOCUS_CHANGE_MASK |
 314                            GDK_STRUCTURE_MASK);
 315   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 316   hb->float_window = gdk_window_new (NULL, &attributes, attributes_mask);
 317   gdk_window_set_user_data (hb->float_window, widget);
 318   gdk_window_set_decorations (hb->float_window, 0);
 319
 320
 321   widget->style = gtk_style_attach (widget->style, widget->window);
 322   gtk_style_set_background (widget->style, widget->window, GTK_WIDGET_STATE (hb));
 323   gtk_style_set_background (widget->style, hb->bin_window, GTK_WIDGET_STATE (hb));
 324   gtk_style_set_background (widget->style, hb->float_window, GTK_WIDGET_STATE (hb));
 325 }
 326
 327 static void
 328 gtk_handle_box_unrealize (GtkWidget *widget)
 329 {
 330   GtkHandleBox *hb;
 331
 332   g_return_if_fail (widget != NULL);
 333   g_return_if_fail (GTK_IS_HANDLE_BOX (widget));
 334
 335   hb = GTK_HANDLE_BOX (widget);
 336
 337   gdk_window_set_user_data (hb->bin_window, NULL);
 338   gdk_window_destroy (hb->bin_window);
 339   hb->bin_window = NULL;
 340   gdk_window_set_user_data (hb->float_window, NULL);
 341   gdk_window_destroy (hb->float_window);
 342   hb->float_window = NULL;
 343
 344   gdk_cursor_destroy (hb->fleur_cursor);
 345   hb->fleur_cursor = NULL;
 346
 347   if (GTK_WIDGET_CLASS (parent_class)->unrealize)
 348     (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 349 }
 350
 351 static void
 352 gtk_handle_box_size_request (GtkWidget      *widget,
 353                              GtkRequisition *requisition)
 354 {
 355   GtkBin *bin;
 356   GtkHandleBox *hb;
 357
 358   g_return_if_fail (widget != NULL);
 359   g_return_if_fail (GTK_IS_HANDLE_BOX (widget));
 360   g_return_if_fail (requisition != NULL);
 361
 362   bin = GTK_BIN (widget);
 363   hb = GTK_HANDLE_BOX (widget);
 364
 365   if (hb->handle_position == GTK_POS_LEFT ||
 366       hb->handle_position == GTK_POS_RIGHT)
 367     {
 368       requisition->width = DRAG_HANDLE_SIZE;
 369       requisition->height = 0;
 370     }
 371   else
 372     {
 373       requisition->width = 0;
 374       requisition->height = DRAG_HANDLE_SIZE;
 375     }
 376
 377   /* if our child is not visible, we still request its size, since we
 378    * won't have any usefull hint for our size otherwise.
 379    */
 380   if (bin->child)
 381     gtk_widget_size_request (bin->child, &bin->child->requisition);
 382
 383   if (hb->child_detached)
 384     {
 385       if (!hb->shrink_on_detach)
 386         {
 387           if (hb->handle_position == GTK_POS_LEFT ||
 388               hb->handle_position == GTK_POS_RIGHT)
 389             requisition->height += bin->child->requisition.height;
 390           else
 391             requisition->width += bin->child->requisition.width;
 392         }
 393       else
 394         {
 395           if (hb->handle_position == GTK_POS_LEFT ||
 396               hb->handle_position == GTK_POS_RIGHT)
 397             requisition->height += widget->style->klass->ythickness;
 398           else
 399             requisition->width += widget->style->klass->xthickness;
 400         }
 401     }
 402   else
 403     {
 404       requisition->width += GTK_CONTAINER (widget)->border_width * 2;
 405       requisition->height += GTK_CONTAINER (widget)->border_width * 2;
 406
 407       if (bin->child)
 408         {
 409           requisition->width += bin->child->requisition.width;
 410           requisition->height += bin->child->requisition.height;
 411         }
 412       else
 413         {
 414           requisition->width += CHILDLESS_SIZE;
 415           requisition->height += CHILDLESS_SIZE;
 416         }
 417     }
 418   g_print ("size_request: width=%d height=%d\n", requisition->width, requisition->height);
 419 }
 420
 421 static void
 422 gtk_handle_box_size_allocate (GtkWidget     *widget,
 423                               GtkAllocation *allocation)
 424 {
 425   GtkBin *bin;
 426   GtkHandleBox *hb;
 427
 428   g_return_if_fail (widget != NULL);
 429   g_return_if_fail (GTK_IS_HANDLE_BOX (widget));
 430   g_return_if_fail (allocation != NULL);
 431
 432   bin = GTK_BIN (widget);
 433   hb = GTK_HANDLE_BOX (widget);
 434
 435   widget->allocation.x = allocation->x;
 436
 437   if (hb->child_detached)
 438     {
 439       guint max_req_height;
 440       guint max_req_width;
 441
 442       max_req_height = MAX (widget->requisition.height,
 443                             bin->child->requisition.height +
 444                             2 * widget->style->klass->ythickness);
 445       max_req_width = MAX (widget->requisition.width,
 446                            bin->child->requisition.width +
 447                            2 * widget->style->klass->xthickness);
 448
 449       if (allocation->height > max_req_height)
 450         widget->allocation.y = allocation->y +
 451           (allocation->height - max_req_height) / 2;
 452       else
 453         widget->allocation.y = allocation->y;
 454
 455       widget->allocation.height = MIN (allocation->height, max_req_height);
 456       widget->allocation.width = MIN (allocation->width, max_req_width);
 457     }
 458   else
 459     {
 460       widget->allocation = *allocation;
 461     }
 462
 463   if (GTK_WIDGET_REALIZED (hb))
 464     gdk_window_move_resize (widget->window,
 465                             widget->allocation.x,
 466                             widget->allocation.y,
 467                             widget->allocation.width,
 468                             widget->allocation.height);
 469
 470
 471   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 472     {
 473       GtkWidget *child;
 474       GtkAllocation child_allocation;
 475       guint border_width;
 476
 477       child = bin->child;
 478       border_width = GTK_CONTAINER (widget)->border_width;
 479
 480       child_allocation.x = border_width;
 481       child_allocation.y = border_width;
 482       if (hb->handle_position == GTK_POS_LEFT)
 483         child_allocation.x += DRAG_HANDLE_SIZE;
 484       else if (hb->handle_position == GTK_POS_TOP)
 485         child_allocation.y += DRAG_HANDLE_SIZE;
 486
 487       if (hb->child_detached)
 488         {
 489           guint float_width;
 490           guint float_height;
 491
 492           child_allocation.width = child->requisition.width;
 493           child_allocation.height = child->requisition.height;
 494
 495           float_width = child_allocation.width + 2 * border_width;
 496           float_height = child_allocation.height + 2 * border_width;
 497
 498           if (hb->handle_position == GTK_POS_LEFT ||
 499               hb->handle_position == GTK_POS_RIGHT)
 500             float_width += DRAG_HANDLE_SIZE;
 501           else
 502             float_height += DRAG_HANDLE_SIZE;
 503
 504           if (GTK_WIDGET_REALIZED (hb))
 505             {
 506               gdk_window_resize (hb->float_window,
 507                                  float_width,
 508                                  float_height);
 509               gdk_window_move_resize (hb->bin_window,
 510                                       0,
 511                                       0,
 512                                       float_width,
 513                                       float_height);
 514             }
 515         }
 516       else
 517         {
 518           child_allocation.width = widget->allocation.width - 2 * border_width;
 519           child_allocation.height = widget->allocation.height - 2 * border_width;
 520
 521           if (hb->handle_position == GTK_POS_LEFT ||
 522               hb->handle_position == GTK_POS_RIGHT)
 523             child_allocation.width -= DRAG_HANDLE_SIZE;
 524           else
 525             child_allocation.height -= DRAG_HANDLE_SIZE;
 526
 527           if (GTK_WIDGET_REALIZED (hb))
 528             gdk_window_move_resize (hb->bin_window,
 529                                     0,
 530                                     0,
 531                                     widget->allocation.width,
 532                                     widget->allocation.height);
 533         }
 534
 535       gtk_widget_size_allocate (bin->child, &child_allocation);
 536     }
 537 }
 538
 539 static void
 540 gtk_handle_box_draw_ghost (GtkHandleBox *hb)
 541 {
 542   GtkWidget *widget;
 543   guint x;
 544   guint y;
 545   guint width;
 546   guint height;
 547
 548   widget = GTK_WIDGET (hb);
 549
 550   if (hb->handle_position == GTK_POS_LEFT ||
 551       hb->handle_position == GTK_POS_RIGHT)
 552     {
 553       x = hb->handle_position == GTK_POS_LEFT ? 0 : widget->allocation.width;
 554       y = 0;
 555       width = DRAG_HANDLE_SIZE;
 556       height = widget->allocation.height;
 557     }
 558   else
 559     {
 560       x = 0;
 561       y = hb->handle_position == GTK_POS_TOP ? 0 : widget->allocation.height;
 562       width = widget->allocation.width;
 563       height = DRAG_HANDLE_SIZE;
 564     }
 565   gtk_draw_shadow (widget->style,
 566                    widget->window,
 567                    GTK_WIDGET_STATE (widget),
 568                    GTK_SHADOW_ETCHED_IN,
 569                    x,
 570                    y,
 571                    width,
 572                    height);
 573   /*
 574   if (hb->handle_position == GTK_POS_LEFT ||
 575       hb->handle_position == GTK_POS_RIGHT)
 576     gtk_draw_hline (widget->style,
 577                     widget->window,
 578                     GTK_WIDGET_STATE (widget),
 579                     hb->handle_position == GTK_POS_LEFT ? DRAG_HANDLE_SIZE : widget->allocation.width - DRAG_HANDLE_SIZE,
 580                     widget->allocation.width - DRAG_HANDLE_SIZE,
 581                     widget->allocation.height / 2);
 582   else
 583     gtk_draw_vline (widget->style,
 584                     widget->window,
 585                     GTK_WIDGET_STATE (widget),
 586                     hb->handle_position == GTK_POS_TOP ? DRAG_HANDLE_SIZE : widget->allocation.height - DRAG_HANDLE_SIZE,
 587                     widget->allocation.height - DRAG_HANDLE_SIZE,
 588                     widget->allocation.width / 2);
 589                     */
 590 }
 591
 592 static void
 593 gtk_handle_box_paint (GtkWidget      *widget,
 594                       GdkEventExpose *event,
 595                       GdkRectangle   *area)
 596 {
 597   GtkBin *bin;
 598   GtkHandleBox *hb;
 599   guint width;
 600   guint height;
 601   guint border_width;
 602
 603   bin = GTK_BIN (widget);
 604   hb = GTK_HANDLE_BOX (widget);
 605
 606   border_width = GTK_CONTAINER (hb)->border_width;
 607
 608   if (hb->child_detached)
 609     {
 610       width = bin->child->allocation.width + 2 * border_width;
 611       height = bin->child->allocation.height + 2 * border_width;
 612     }
 613   else if (hb->handle_position == GTK_POS_LEFT ||
 614            hb->handle_position == GTK_POS_RIGHT)
 615     {
 616       width = widget->allocation.width - DRAG_HANDLE_SIZE;
 617       height = widget->allocation.height;
 618     }
 619   else
 620     {
 621       width = widget->allocation.width;
 622       height = widget->allocation.height - DRAG_HANDLE_SIZE;
 623     }
 624
 625   gdk_window_clear (hb->bin_window);
 626   gtk_draw_shadow (widget->style,
 627                    hb->bin_window,
 628                    GTK_WIDGET_STATE (widget),
 629                    GTK_SHADOW_OUT,
 630                    hb->handle_position == GTK_POS_LEFT ? DRAG_HANDLE_SIZE : 0,
 631                    hb->handle_position == GTK_POS_TOP ? DRAG_HANDLE_SIZE : 0,
 632                    width,
 633                    height);
 634
 635   if (hb->handle_position == GTK_POS_LEFT ||
 636       hb->handle_position == GTK_POS_RIGHT)
 637     {
 638       guint x;
 639
 640       for (x = 1; x < DRAG_HANDLE_SIZE; x += 3)
 641
 642         gtk_draw_vline (widget->style,
 643                         hb->bin_window,
 644                         GTK_WIDGET_STATE (widget),
 645                         widget->style->klass->ythickness,
 646                         height + DRAG_HANDLE_SIZE - widget->style->klass->ythickness,
 647                         hb->handle_position == GTK_POS_LEFT ? x : width + x);
 648       gtk_draw_hline (widget->style,
 649                       hb->bin_window,
 650                       GTK_WIDGET_STATE (widget),
 651                       hb->handle_position == GTK_POS_LEFT ? DRAG_HANDLE_SIZE : width,
 652                       hb->handle_position == GTK_POS_LEFT ? 0 : width + DRAG_HANDLE_SIZE,
 653                       0);
 654       gtk_draw_hline (widget->style,
 655                       hb->bin_window,
 656                       GTK_WIDGET_STATE (widget),
 657                       hb->handle_position == GTK_POS_LEFT ? DRAG_HANDLE_SIZE : width,
 658                       hb->handle_position == GTK_POS_LEFT ? 0 : width + DRAG_HANDLE_SIZE,
 659                       height - widget->style->klass->ythickness);
 660     }
 661   else
 662     {
 663       guint y;
 664
 665       for (y = 1; y < DRAG_HANDLE_SIZE; y += 3)
 666
 667         gtk_draw_hline (widget->style,
 668                         hb->bin_window,
 669                         GTK_WIDGET_STATE (widget),
 670                         widget->style->klass->xthickness,
 671                         width + DRAG_HANDLE_SIZE - widget->style->klass->xthickness,
 672                         hb->handle_position == GTK_POS_TOP ? y : height + y);
 673       gtk_draw_vline (widget->style,
 674                       hb->bin_window,
 675                       GTK_WIDGET_STATE (widget),
 676                       hb->handle_position == GTK_POS_TOP ? DRAG_HANDLE_SIZE : height,
 677                       hb->handle_position == GTK_POS_TOP ? 0 : height + DRAG_HANDLE_SIZE,
 678                       0);
 679       gtk_draw_vline (widget->style,
 680                       hb->bin_window,
 681                       GTK_WIDGET_STATE (widget),
 682                       hb->handle_position == GTK_POS_TOP ? DRAG_HANDLE_SIZE : height,
 683                       hb->handle_position == GTK_POS_TOP ? 0 : height + DRAG_HANDLE_SIZE,
 684                       width - widget->style->klass->xthickness);
 685     }
 686
 687
 688   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 689     {
 690       GdkRectangle child_area;
 691       GdkEventExpose child_event;
 692
 693       if (!event) /* we were called from draw() */
 694         {
 695           if (gtk_widget_intersect (bin->child, area, &child_area))
 696             gtk_widget_draw (bin->child, &child_area);
 697         }
 698       else /* we were called from expose() */
 699         {
 700           child_event = *event;
 701
 702           if (GTK_WIDGET_NO_WINDOW (bin->child) &&
 703               gtk_widget_intersect (bin->child, &event->area, &child_event.area))
 704             gtk_widget_event (bin->child, (GdkEvent *) &child_event);
 705         }
 706     }
 707 }
 708
 709 static void
 710 gtk_handle_box_draw (GtkWidget    *widget,
 711                      GdkRectangle *area)
 712 {
 713   GtkHandleBox *hb;
 714
 715   g_return_if_fail (widget != NULL);
 716   g_return_if_fail (GTK_IS_HANDLE_BOX (widget));
 717   g_return_if_fail (area != NULL);
 718
 719   hb = GTK_HANDLE_BOX (widget);
 720
 721   if (GTK_WIDGET_DRAWABLE (widget))
 722     {
 723       if (hb->child_detached)
 724         {
 725           /* The area parameter does not make sense in this case, so we
 726            * repaint everything.
 727            */
 728
 729           gtk_handle_box_draw_ghost (hb);
 730
 731           area->x = 0;
 732           area->y = 0;
 733           area->width = 2 * GTK_CONTAINER (hb)->border_width + DRAG_HANDLE_SIZE;
 734           area->height = area->width + GTK_BIN (hb)->child->allocation.height;
 735           area->width += GTK_BIN (hb)->child->allocation.width;
 736
 737           gtk_handle_box_paint (widget, NULL, area);
 738         }
 739       else
 740         gtk_handle_box_paint (widget, NULL, area);
 741     }
 742 }
 743
 744 static gint
 745 gtk_handle_box_expose (GtkWidget      *widget,
 746                        GdkEventExpose *event)
 747 {
 748   GtkHandleBox *hb;
 749
 750   g_return_val_if_fail (widget != NULL, FALSE);
 751   g_return_val_if_fail (GTK_IS_HANDLE_BOX (widget), FALSE);
 752   g_return_val_if_fail (event != NULL, FALSE);
 753
 754   if (GTK_WIDGET_DRAWABLE (widget))
 755     {
 756       hb = GTK_HANDLE_BOX (widget);
 757
 758       if (event->window == widget->window)
 759         {
 760           if (hb->child_detached)
 761             gtk_handle_box_draw_ghost (hb);
 762         }
 763       else
 764         gtk_handle_box_paint (widget, event, NULL);
 765     }
 766
 767   return FALSE;
 768 }
 769
 770 static gint
 771 gtk_handle_box_button_changed (GtkWidget      *widget,
 772                                GdkEventButton *event)
 773 {
 774   GtkHandleBox *hb;
 775   gboolean event_handled;
 776
 777   g_return_val_if_fail (widget != NULL, FALSE);
 778   g_return_val_if_fail (GTK_IS_HANDLE_BOX (widget), FALSE);
 779   g_return_val_if_fail (event != NULL, FALSE);
 780
 781   hb = GTK_HANDLE_BOX (widget);
 782
 783   event_handled = FALSE;
 784   if (event->button == 1 &&
 785       event->type == GDK_BUTTON_PRESS)
 786     {
 787       GtkWidget *child;
 788       gboolean in_handle;
 789
 790       child = GTK_BIN (hb)->child;
 791
 792       switch (hb->handle_position)
 793         {
 794         case GTK_POS_LEFT:
 795           in_handle = event->x < DRAG_HANDLE_SIZE;
 796           break;
 797         case GTK_POS_TOP:
 798           in_handle = event->y < DRAG_HANDLE_SIZE;
 799           break;
 800         case GTK_POS_RIGHT:
 801           in_handle = event->x > 2 * GTK_CONTAINER (hb)->border_width + child->allocation.width;
 802           break;
 803         case GTK_POS_BOTTOM:
 804           in_handle = event->y > 2 * GTK_CONTAINER (hb)->border_width + child->allocation.height;
 805           break;
 806         default:
 807           in_handle = FALSE;
 808           break;
 809         }
 810
 811       if (!child)
 812         {
 813           in_handle = FALSE;
 814           event_handled = TRUE;
 815         }
 816
 817       if (in_handle)
 818         {
 819           hb->dragoff_x = event->x;
 820           hb->dragoff_y = event->y;
 821
 822           gtk_grab_add (widget);
 823           hb->in_drag = TRUE;
 824           while (gdk_pointer_grab (hb->bin_window,
 825                                    FALSE,
 826                                    (GDK_BUTTON1_MOTION_MASK |
 827                                     GDK_POINTER_MOTION_HINT_MASK |
 828                                     GDK_BUTTON_RELEASE_MASK),
 829                                    NULL,
 830                                    hb->fleur_cursor,
 831                                    GDK_CURRENT_TIME) != 0); /* wait for success */
 832           event_handled = TRUE;
 833         }
 834     }
 835   else if (event->type == GDK_BUTTON_RELEASE &&
 836            hb->in_drag)
 837     {
 838       gdk_pointer_ungrab (GDK_CURRENT_TIME);
 839       gtk_grab_remove (widget);
 840       hb->in_drag = FALSE;
 841       event_handled = TRUE;
 842     }
 843
 844   return event_handled;
 845 }
 846
 847 static gint
 848 gtk_handle_box_motion (GtkWidget      *widget,
 849                        GdkEventMotion *event)
 850 {
 851   GtkHandleBox *hb;
 852   gint new_x, new_y;
 853   gint ox, oy;
 854   gint snap_x, snap_y;
 855   gboolean in_handle;
 856
 857   g_return_val_if_fail (widget != NULL, FALSE);
 858   g_return_val_if_fail (GTK_IS_HANDLE_BOX (widget), FALSE);
 859   g_return_val_if_fail (event != NULL, FALSE);
 860
 861   hb = GTK_HANDLE_BOX (widget);
 862   if (!hb->in_drag)
 863     return FALSE;
 864
 865   ox = 0;
 866   oy = 0;
 867   gdk_window_get_origin (hb->float_window, &ox, &oy);
 868   new_x = 0;
 869   new_y = 0;
 870   gdk_window_get_pointer (hb->float_window, &new_x, &new_y, NULL);
 871   new_x += ox;
 872   new_y += oy;
 873   new_x -= hb->dragoff_x;
 874   new_y -= hb->dragoff_y;
 875   snap_x = 0;
 876   snap_y = 0;
 877   gdk_window_get_pointer (widget->window, &snap_x, &snap_y, NULL);
 878
 879   switch (hb->handle_position)
 880     {
 881     case GTK_POS_LEFT:
 882       in_handle = (snap_x >= 0 && snap_x <= DRAG_HANDLE_SIZE &&
 883                    snap_y >= 0 && snap_y <= widget->allocation.height);
 884       break;
 885     case GTK_POS_TOP:
 886       in_handle = (snap_x >= 0 && snap_x <= widget->allocation.width &&
 887                    snap_y >= 0 && snap_y <= DRAG_HANDLE_SIZE);
 888       break;
 889     case GTK_POS_RIGHT:
 890       in_handle = (snap_x >= widget->allocation.width - DRAG_HANDLE_SIZE && snap_x <= widget->allocation.width &&
 891                    snap_y >= 0 && snap_y <= widget->allocation.height);
 892       break;
 893     case GTK_POS_BOTTOM:
 894       in_handle = (snap_x >= 0 && snap_x <= widget->allocation.width &&
 895                    snap_y >= widget->allocation.height - DRAG_HANDLE_SIZE && snap_y <= widget->allocation.height);
 896       break;
 897     default:
 898       in_handle = FALSE;
 899       break;
 900     }
 901
 902   if (in_handle)
 903     {
 904       if (hb->child_detached)
 905         {
 906           gdk_pointer_ungrab (GDK_CURRENT_TIME);
 907
 908           hb->child_detached = FALSE;
 909           gdk_window_hide (hb->float_window);
 910           gdk_window_reparent (hb->bin_window, widget->window, 0, 0);
 911           hb->float_window_mapped = FALSE;
 912           gtk_signal_emit (GTK_OBJECT (hb),
 913                            handle_box_signals[SIGNAL_CHILD_ATTACHED],
 914                            GTK_BIN (hb)->child);
 915
 916           while (gdk_pointer_grab (hb->bin_window,
 917                                    FALSE,
 918                                    (GDK_BUTTON1_MOTION_MASK |
 919                                     GDK_POINTER_MOTION_HINT_MASK |
 920                                     GDK_BUTTON_RELEASE_MASK),
 921                                    NULL,
 922                                    hb->fleur_cursor,
 923                                    GDK_CURRENT_TIME) != 0); /* wait for success */
 924
 925           gtk_widget_queue_resize (widget);
 926         }
 927     }
 928   else
 929     {
 930       if (hb->child_detached)
 931         {
 932           gdk_window_move (hb->float_window, new_x, new_y);
 933           gdk_window_raise (hb->float_window);
 934         }
 935       else
 936         {
 937           gint width;
 938           gint height;
 939
 940           gdk_pointer_ungrab (GDK_CURRENT_TIME);
 941
 942           hb->child_detached = TRUE;
 943           width = 0;
 944           height = 0;
 945           gdk_window_get_size (hb->bin_window, &width, &height);
 946           gdk_window_move_resize (hb->float_window, new_x, new_y, width, height);
 947           gdk_window_reparent (hb->bin_window, hb->float_window, 0, 0);
 948           gdk_window_set_hints (hb->float_window, new_x, new_y, 0, 0, 0, 0, GDK_HINT_POS);
 949           gdk_window_show (hb->float_window);
 950           hb->float_window_mapped = TRUE;
 951 #if     0
 952           /* this extra move is neccessary if we use decorations, or our
 953            * window manager insists on decorations.
 954            */
 955           gdk_flush ();
 956           gdk_window_move (hb->float_window, new_x, new_y);
 957           gdk_flush ();
 958 #endif  /* 0 */
 959           gtk_signal_emit (GTK_OBJECT (hb),
 960                            handle_box_signals[SIGNAL_CHILD_DETACHED],
 961                            GTK_BIN (hb)->child);
 962           gtk_handle_box_draw_ghost (hb);
 963
 964           while (gdk_pointer_grab (hb->bin_window,
 965                                    FALSE,
 966                                    (GDK_BUTTON1_MOTION_MASK |
 967                                     GDK_POINTER_MOTION_HINT_MASK |
 968                                     GDK_BUTTON_RELEASE_MASK),
 969                                    NULL,
 970                                    hb->fleur_cursor,
 971                                    GDK_CURRENT_TIME) != 0); /* wait for success */
 972
 973           gtk_widget_queue_resize (widget);
 974         }
 975     }
 976
 977   return TRUE;
 978 }
 979
 980 static void
 981 gtk_handle_box_add (GtkContainer *container,
 982                     GtkWidget    *widget)
 983 {
 984   g_return_if_fail (GTK_IS_HANDLE_BOX (container));
 985   g_return_if_fail (GTK_BIN (container)->child == NULL);
 986   g_return_if_fail (widget->parent == NULL);
 987
 988   gtk_widget_set_parent_window (widget, GTK_HANDLE_BOX (container)->bin_window);
 989   GTK_CONTAINER_CLASS (parent_class)->add (container, widget);
 990 }
 991
 992 static void
 993 gtk_handle_box_remove (GtkContainer *container,
 994                        GtkWidget    *widget)
 995 {
 996   GtkHandleBox *hb;
 997
 998   g_return_if_fail (GTK_IS_HANDLE_BOX (container));
 999   g_return_if_fail (GTK_BIN (container)->child == widget);
1000
1001   hb = GTK_HANDLE_BOX (container);
1002
1003   if (hb->child_detached)
1004     {
1005       hb->child_detached = FALSE;
1006       if (GTK_WIDGET_REALIZED (hb))
1007         {
1008           gdk_window_hide (hb->float_window);
1009           gdk_window_reparent (hb->bin_window, GTK_WIDGET (hb)->window, 0, 0);
1010         }
1011       hb->float_window_mapped = FALSE;
1012     }
1013   if (hb->in_drag)
1014     {
1015       gdk_pointer_ungrab (GDK_CURRENT_TIME);
1016       gtk_grab_remove (GTK_WIDGET (container));
1017       hb->in_drag = FALSE;
1018     }
1019
1020   GTK_CONTAINER_CLASS (parent_class)->remove (container, widget);
1021 }
1022
1023 static gint
1024 gtk_handle_box_delete_event (GtkWidget *widget,
1025                              GdkEventAny  *event)
1026 {
1027   GtkHandleBox *hb;
1028
1029   g_return_val_if_fail (widget != NULL, FALSE);
1030   g_return_val_if_fail (GTK_IS_HANDLE_BOX (widget), FALSE);
1031   g_return_val_if_fail (event != NULL, FALSE);
1032
1033   hb = GTK_HANDLE_BOX (widget);
1034   g_return_val_if_fail (event->window == hb->float_window, FALSE);
1035
1036   hb->child_detached = FALSE;
1037   gdk_window_hide (hb->float_window);
1038   gdk_window_reparent (hb->bin_window, widget->window, 0, 0);
1039   hb->float_window_mapped = FALSE;
1040   gtk_signal_emit (GTK_OBJECT (hb),
1041                    handle_box_signals[SIGNAL_CHILD_ATTACHED],
1042                    GTK_BIN (hb)->child);
1043   if (hb->in_drag)
1044     {
1045       gdk_pointer_ungrab (GDK_CURRENT_TIME);
1046       gtk_grab_remove (widget);
1047       hb->in_drag = FALSE;
1048     }
1049
1050   gtk_widget_queue_resize (GTK_WIDGET (hb));
1051
1052   return TRUE;
1053 }