Pileus Git - ~andy/gtk/blob - tests/gtkoffscreenbox.c

   1 /*
   2  * gtkoffscreenbox.c
   3  */
   4
   5 #include "config.h"
   6
   7 #include <math.h>
   8 #include <gtk/gtk.h>
   9
  10 #include "gtkoffscreenbox.h"
  11
  12 static void        gtk_offscreen_box_realize       (GtkWidget       *widget);
  13 static void        gtk_offscreen_box_unrealize     (GtkWidget       *widget);
  14 static void        gtk_offscreen_box_size_request  (GtkWidget       *widget,
  15                                                     GtkRequisition  *requisition);
  16 static void        gtk_offscreen_box_size_allocate (GtkWidget       *widget,
  17                                                     GtkAllocation   *allocation);
  18 static gboolean    gtk_offscreen_box_damage        (GtkWidget       *widget,
  19                                                     GdkEventExpose  *event);
  20 static gboolean    gtk_offscreen_box_draw          (GtkWidget       *widget,
  21                                                     cairo_t         *cr);
  22
  23 static void        gtk_offscreen_box_add           (GtkContainer    *container,
  24                                                     GtkWidget       *child);
  25 static void        gtk_offscreen_box_remove        (GtkContainer    *container,
  26                                                     GtkWidget       *widget);
  27 static void        gtk_offscreen_box_forall        (GtkContainer    *container,
  28                                                     gboolean         include_internals,
  29                                                     GtkCallback      callback,
  30                                                     gpointer         callback_data);
  31 static GType       gtk_offscreen_box_child_type    (GtkContainer    *container);
  32
  33 #define CHILD1_SIZE_SCALE 1.0
  34 #define CHILD2_SIZE_SCALE 1.0
  35
  36 G_DEFINE_TYPE (GtkOffscreenBox, gtk_offscreen_box, GTK_TYPE_CONTAINER);
  37
  38 static void
  39 to_child_2 (GtkOffscreenBox *offscreen_box,
  40             double widget_x, double widget_y,
  41             double *x_out, double *y_out)
  42 {
  43   GtkAllocation child_area;
  44   double x, y, xr, yr;
  45   double cos_angle, sin_angle;
  46
  47   x = widget_x;
  48   y = widget_y;
  49
  50   gtk_widget_get_allocation (offscreen_box->child1, &child_area);
  51   if (offscreen_box->child1 && gtk_widget_get_visible (offscreen_box->child1))
  52     y -= child_area.height;
  53
  54   gtk_widget_get_allocation (offscreen_box->child2, &child_area);
  55
  56   x -= child_area.width / 2;
  57   y -= child_area.height / 2;
  58
  59   cos_angle = cos (-offscreen_box->angle);
  60   sin_angle = sin (-offscreen_box->angle);
  61
  62   xr = x * cos_angle - y * sin_angle;
  63   yr = x * sin_angle + y * cos_angle;
  64   x = xr;
  65   y = yr;
  66
  67   x += child_area.width / 2;
  68   y += child_area.height / 2;
  69
  70   *x_out = x;
  71   *y_out = y;
  72 }
  73
  74 static void
  75 to_parent_2 (GtkOffscreenBox *offscreen_box,
  76              double offscreen_x, double offscreen_y,
  77              double *x_out, double *y_out)
  78 {
  79   GtkAllocation child_area;
  80   double x, y, xr, yr;
  81   double cos_angle, sin_angle;
  82
  83   gtk_widget_get_allocation (offscreen_box->child2, &child_area);
  84
  85   x = offscreen_x;
  86   y = offscreen_y;
  87
  88   x -= child_area.width / 2;
  89   y -= child_area.height / 2;
  90
  91   cos_angle = cos (offscreen_box->angle);
  92   sin_angle = sin (offscreen_box->angle);
  93
  94   xr = x * cos_angle - y * sin_angle;
  95   yr = x * sin_angle + y * cos_angle;
  96   x = xr;
  97   y = yr;
  98
  99   x += child_area.width / 2;
 100   y += child_area.height / 2;
 101
 102   gtk_widget_get_allocation (offscreen_box->child1, &child_area);
 103   if (offscreen_box->child1 && gtk_widget_get_visible (offscreen_box->child1))
 104     y += child_area.height;
 105
 106   *x_out = x;
 107   *y_out = y;
 108 }
 109
 110 static void
 111 gtk_offscreen_box_class_init (GtkOffscreenBoxClass *klass)
 112 {
 113   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 114   GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
 115
 116   widget_class->realize = gtk_offscreen_box_realize;
 117   widget_class->unrealize = gtk_offscreen_box_unrealize;
 118   widget_class->size_request = gtk_offscreen_box_size_request;
 119   widget_class->size_allocate = gtk_offscreen_box_size_allocate;
 120   widget_class->draw = gtk_offscreen_box_draw;
 121
 122   g_signal_override_class_closure (g_signal_lookup ("damage-event", GTK_TYPE_WIDGET),
 123                                    GTK_TYPE_OFFSCREEN_BOX,
 124                                    g_cclosure_new (G_CALLBACK (gtk_offscreen_box_damage),
 125                                                    NULL, NULL));
 126
 127   container_class->add = gtk_offscreen_box_add;
 128   container_class->remove = gtk_offscreen_box_remove;
 129   container_class->forall = gtk_offscreen_box_forall;
 130   container_class->child_type = gtk_offscreen_box_child_type;
 131 }
 132
 133 static void
 134 gtk_offscreen_box_init (GtkOffscreenBox *offscreen_box)
 135 {
 136   gtk_widget_set_has_window (GTK_WIDGET (offscreen_box), TRUE);
 137 }
 138
 139 GtkWidget *
 140 gtk_offscreen_box_new (void)
 141 {
 142   return g_object_new (GTK_TYPE_OFFSCREEN_BOX, NULL);
 143 }
 144
 145 static GdkWindow *
 146 pick_offscreen_child (GdkWindow *offscreen_window,
 147                       double widget_x, double widget_y,
 148                       GtkOffscreenBox *offscreen_box)
 149 {
 150  GtkAllocation child_area;
 151  double x, y;
 152
 153  /* First check for child 2 */
 154  if (offscreen_box->child2 &&
 155      gtk_widget_get_visible (offscreen_box->child2))
 156     {
 157       to_child_2 (offscreen_box,
 158                   widget_x, widget_y,
 159                   &x, &y);
 160
 161       gtk_widget_get_allocation (offscreen_box->child2, &child_area);
 162
 163       if (x >= 0 && x < child_area.width &&
 164           y >= 0 && y < child_area.height)
 165         return offscreen_box->offscreen_window2;
 166     }
 167
 168  if (offscreen_box->child1 && gtk_widget_get_visible (offscreen_box->child1))
 169    {
 170      x = widget_x;
 171      y = widget_y;
 172
 173      gtk_widget_get_allocation (offscreen_box->child1, &child_area);
 174
 175      if (x >= 0 && x < child_area.width &&
 176          y >= 0 && y < child_area.height)
 177        return offscreen_box->offscreen_window1;
 178    }
 179
 180   return NULL;
 181 }
 182
 183 static void
 184 offscreen_window_to_parent1 (GdkWindow       *offscreen_window,
 185                              double           offscreen_x,
 186                              double           offscreen_y,
 187                              double          *parent_x,
 188                              double          *parent_y,
 189                              GtkOffscreenBox *offscreen_box)
 190 {
 191   *parent_x = offscreen_x;
 192   *parent_y = offscreen_y;
 193 }
 194
 195 static void
 196 offscreen_window_from_parent1 (GdkWindow       *window,
 197                                double           parent_x,
 198                                double           parent_y,
 199                                double          *offscreen_x,
 200                                double          *offscreen_y,
 201                                GtkOffscreenBox *offscreen_box)
 202 {
 203   *offscreen_x = parent_x;
 204   *offscreen_y = parent_y;
 205 }
 206
 207 static void
 208 offscreen_window_to_parent2 (GdkWindow       *offscreen_window,
 209                              double           offscreen_x,
 210                              double           offscreen_y,
 211                              double          *parent_x,
 212                              double          *parent_y,
 213                              GtkOffscreenBox *offscreen_box)
 214 {
 215   to_parent_2 (offscreen_box,
 216               offscreen_x, offscreen_y,
 217               parent_x, parent_y);
 218 }
 219
 220 static void
 221 offscreen_window_from_parent2 (GdkWindow       *window,
 222                                double           parent_x,
 223                                double           parent_y,
 224                                double          *offscreen_x,
 225                                double          *offscreen_y,
 226                                GtkOffscreenBox *offscreen_box)
 227 {
 228   to_child_2 (offscreen_box,
 229               parent_x, parent_y,
 230               offscreen_x, offscreen_y);
 231 }
 232
 233 static void
 234 gtk_offscreen_box_realize (GtkWidget *widget)
 235 {
 236   GtkOffscreenBox *offscreen_box = GTK_OFFSCREEN_BOX (widget);
 237   GtkAllocation allocation, child_area;
 238   GtkStyle *style;
 239   GdkWindow *window;
 240   GdkWindowAttr attributes;
 241   gint attributes_mask;
 242   guint border_width;
 243   GtkRequisition child_requisition;
 244   int start_y = 0;
 245
 246   gtk_widget_set_realized (widget, TRUE);
 247
 248   border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 249
 250   gtk_widget_get_allocation (widget, &allocation);
 251
 252   attributes.x = allocation.x + border_width;
 253   attributes.y = allocation.y + border_width;
 254   attributes.width = allocation.width - 2 * border_width;
 255   attributes.height = allocation.height - 2 * border_width;
 256   attributes.window_type = GDK_WINDOW_CHILD;
 257   attributes.event_mask = gtk_widget_get_events (widget)
 258                         | GDK_EXPOSURE_MASK
 259                         | GDK_POINTER_MOTION_MASK
 260                         | GDK_BUTTON_PRESS_MASK
 261                         | GDK_BUTTON_RELEASE_MASK
 262                         | GDK_SCROLL_MASK
 263                         | GDK_ENTER_NOTIFY_MASK
 264                         | GDK_LEAVE_NOTIFY_MASK;
 265
 266   attributes.visual = gtk_widget_get_visual (widget);
 267   attributes.wclass = GDK_INPUT_OUTPUT;
 268
 269   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
 270
 271   window = gdk_window_new (gtk_widget_get_parent_window (widget),
 272                            &attributes, attributes_mask);
 273   gtk_widget_set_window (widget, window);
 274   gdk_window_set_user_data (window, widget);
 275
 276   g_signal_connect (window, "pick-embedded-child",
 277                     G_CALLBACK (pick_offscreen_child), offscreen_box);
 278
 279   attributes.window_type = GDK_WINDOW_OFFSCREEN;
 280
 281   /* Child 1 */
 282   attributes.x = attributes.y = 0;
 283   if (offscreen_box->child1 && gtk_widget_get_visible (offscreen_box->child1))
 284     {
 285       gtk_widget_get_allocation (offscreen_box->child1, &child_area);
 286
 287       attributes.width = child_area.width;
 288       attributes.height = child_area.height;
 289       start_y += child_area.height;
 290     }
 291   offscreen_box->offscreen_window1 = gdk_window_new (gtk_widget_get_root_window (widget),
 292                                                      &attributes, attributes_mask);
 293   gdk_window_set_user_data (offscreen_box->offscreen_window1, widget);
 294   if (offscreen_box->child1)
 295     gtk_widget_set_parent_window (offscreen_box->child1, offscreen_box->offscreen_window1);
 296
 297   gdk_offscreen_window_set_embedder (offscreen_box->offscreen_window1,
 298                                      window);
 299
 300   g_signal_connect (offscreen_box->offscreen_window1, "to-embedder",
 301                     G_CALLBACK (offscreen_window_to_parent1), offscreen_box);
 302   g_signal_connect (offscreen_box->offscreen_window1, "from-embedder",
 303                     G_CALLBACK (offscreen_window_from_parent1), offscreen_box);
 304
 305   /* Child 2 */
 306   attributes.y = start_y;
 307   child_requisition.width = child_requisition.height = 0;
 308   if (offscreen_box->child2 && gtk_widget_get_visible (offscreen_box->child2))
 309     {
 310       gtk_widget_get_allocation (offscreen_box->child2, &child_area);
 311
 312       attributes.width = child_area.width;
 313       attributes.height = child_area.height;
 314     }
 315   offscreen_box->offscreen_window2 = gdk_window_new (gtk_widget_get_root_window (widget),
 316                                                      &attributes, attributes_mask);
 317   gdk_window_set_user_data (offscreen_box->offscreen_window2, widget);
 318   if (offscreen_box->child2)
 319     gtk_widget_set_parent_window (offscreen_box->child2, offscreen_box->offscreen_window2);
 320   gdk_offscreen_window_set_embedder (offscreen_box->offscreen_window2,
 321                                      window);
 322   g_signal_connect (offscreen_box->offscreen_window2, "to-embedder",
 323                     G_CALLBACK (offscreen_window_to_parent2), offscreen_box);
 324   g_signal_connect (offscreen_box->offscreen_window2, "from-embedder",
 325                     G_CALLBACK (offscreen_window_from_parent2), offscreen_box);
 326
 327   gtk_widget_style_attach (widget);
 328   style = gtk_widget_get_style (widget);
 329   gtk_style_set_background (style, window, GTK_STATE_NORMAL);
 330   gtk_style_set_background (style, offscreen_box->offscreen_window1, GTK_STATE_NORMAL);
 331   gtk_style_set_background (style, offscreen_box->offscreen_window2, GTK_STATE_NORMAL);
 332
 333   gdk_window_show (offscreen_box->offscreen_window1);
 334   gdk_window_show (offscreen_box->offscreen_window2);
 335 }
 336
 337 static void
 338 gtk_offscreen_box_unrealize (GtkWidget *widget)
 339 {
 340   GtkOffscreenBox *offscreen_box = GTK_OFFSCREEN_BOX (widget);
 341
 342   gdk_window_set_user_data (offscreen_box->offscreen_window1, NULL);
 343   gdk_window_destroy (offscreen_box->offscreen_window1);
 344   offscreen_box->offscreen_window1 = NULL;
 345
 346   gdk_window_set_user_data (offscreen_box->offscreen_window2, NULL);
 347   gdk_window_destroy (offscreen_box->offscreen_window2);
 348   offscreen_box->offscreen_window2 = NULL;
 349
 350   GTK_WIDGET_CLASS (gtk_offscreen_box_parent_class)->unrealize (widget);
 351 }
 352
 353 static GType
 354 gtk_offscreen_box_child_type (GtkContainer *container)
 355 {
 356   GtkOffscreenBox *offscreen_box = GTK_OFFSCREEN_BOX (container);
 357
 358   if (offscreen_box->child1 && offscreen_box->child2)
 359     return G_TYPE_NONE;
 360
 361   return GTK_TYPE_WIDGET;
 362 }
 363
 364 static void
 365 gtk_offscreen_box_add (GtkContainer *container,
 366                        GtkWidget    *widget)
 367 {
 368   GtkOffscreenBox *offscreen_box = GTK_OFFSCREEN_BOX (container);
 369
 370   if (!offscreen_box->child1)
 371     gtk_offscreen_box_add1 (offscreen_box, widget);
 372   else if (!offscreen_box->child2)
 373     gtk_offscreen_box_add2 (offscreen_box, widget);
 374   else
 375     g_warning ("GtkOffscreenBox cannot have more than 2 children\n");
 376 }
 377
 378 void
 379 gtk_offscreen_box_add1 (GtkOffscreenBox *offscreen_box,
 380                         GtkWidget       *child)
 381 {
 382   g_return_if_fail (GTK_IS_OFFSCREEN_BOX (offscreen_box));
 383   g_return_if_fail (GTK_IS_WIDGET (child));
 384
 385   if (offscreen_box->child1 == NULL)
 386     {
 387       gtk_widget_set_parent_window (child, offscreen_box->offscreen_window1);
 388       gtk_widget_set_parent (child, GTK_WIDGET (offscreen_box));
 389       offscreen_box->child1 = child;
 390     }
 391 }
 392
 393 void
 394 gtk_offscreen_box_add2 (GtkOffscreenBox  *offscreen_box,
 395                         GtkWidget    *child)
 396 {
 397   g_return_if_fail (GTK_IS_OFFSCREEN_BOX (offscreen_box));
 398   g_return_if_fail (GTK_IS_WIDGET (child));
 399
 400   if (offscreen_box->child2 == NULL)
 401     {
 402       gtk_widget_set_parent_window (child, offscreen_box->offscreen_window2);
 403       gtk_widget_set_parent (child, GTK_WIDGET (offscreen_box));
 404       offscreen_box->child2 = child;
 405     }
 406 }
 407
 408 static void
 409 gtk_offscreen_box_remove (GtkContainer *container,
 410                           GtkWidget    *widget)
 411 {
 412   GtkOffscreenBox *offscreen_box = GTK_OFFSCREEN_BOX (container);
 413   gboolean was_visible;
 414
 415   was_visible = gtk_widget_get_visible (widget);
 416
 417   if (offscreen_box->child1 == widget)
 418     {
 419       gtk_widget_unparent (widget);
 420
 421       offscreen_box->child1 = NULL;
 422
 423       if (was_visible && gtk_widget_get_visible (GTK_WIDGET (container)))
 424         gtk_widget_queue_resize (GTK_WIDGET (container));
 425     }
 426   else if (offscreen_box->child2 == widget)
 427     {
 428       gtk_widget_unparent (widget);
 429
 430       offscreen_box->child2 = NULL;
 431
 432       if (was_visible && gtk_widget_get_visible (GTK_WIDGET (container)))
 433         gtk_widget_queue_resize (GTK_WIDGET (container));
 434     }
 435 }
 436
 437 static void
 438 gtk_offscreen_box_forall (GtkContainer *container,
 439                           gboolean      include_internals,
 440                           GtkCallback   callback,
 441                           gpointer      callback_data)
 442 {
 443   GtkOffscreenBox *offscreen_box = GTK_OFFSCREEN_BOX (container);
 444
 445   g_return_if_fail (callback != NULL);
 446
 447   if (offscreen_box->child1)
 448     (*callback) (offscreen_box->child1, callback_data);
 449   if (offscreen_box->child2)
 450     (*callback) (offscreen_box->child2, callback_data);
 451 }
 452
 453 void
 454 gtk_offscreen_box_set_angle (GtkOffscreenBox  *offscreen_box,
 455                              gdouble           angle)
 456 {
 457   g_return_if_fail (GTK_IS_OFFSCREEN_BOX (offscreen_box));
 458
 459   offscreen_box->angle = angle;
 460   gtk_widget_queue_draw (GTK_WIDGET (offscreen_box));
 461
 462   /* TODO: Really needs to resent pointer events if over the rotated window */
 463 }
 464
 465
 466 static void
 467 gtk_offscreen_box_size_request (GtkWidget      *widget,
 468                                 GtkRequisition *requisition)
 469 {
 470   GtkOffscreenBox *offscreen_box = GTK_OFFSCREEN_BOX (widget);
 471   int w, h;
 472   guint border_width;
 473
 474   w = 0;
 475   h = 0;
 476
 477   if (offscreen_box->child1 && gtk_widget_get_visible (offscreen_box->child1))
 478     {
 479       GtkRequisition child_requisition;
 480
 481       gtk_size_request_get_size (GTK_SIZE_REQUEST (offscreen_box->child1),
 482                                  &child_requisition, NULL);
 483
 484       w = MAX (w, CHILD1_SIZE_SCALE * child_requisition.width);
 485       h += CHILD1_SIZE_SCALE * child_requisition.height;
 486     }
 487
 488   if (offscreen_box->child2 && gtk_widget_get_visible (offscreen_box->child2))
 489     {
 490       GtkRequisition child_requisition;
 491
 492       gtk_size_request_get_size (GTK_SIZE_REQUEST (offscreen_box->child2),
 493                                  &child_requisition, NULL);
 494
 495       w = MAX (w, CHILD2_SIZE_SCALE * child_requisition.width);
 496       h += CHILD2_SIZE_SCALE * child_requisition.height;
 497     }
 498
 499   border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 500   requisition->width = border_width * 2 + w;
 501   requisition->height = border_width * 2 + h;
 502 }
 503
 504 static void
 505 gtk_offscreen_box_size_allocate (GtkWidget     *widget,
 506                                  GtkAllocation *allocation)
 507 {
 508   GtkOffscreenBox *offscreen_box;
 509   gint start_y;
 510   guint border_width;
 511
 512   offscreen_box = GTK_OFFSCREEN_BOX (widget);
 513
 514   gtk_widget_set_allocation (widget, allocation);
 515
 516   border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 517
 518   if (gtk_widget_get_realized (widget))
 519     gdk_window_move_resize (gtk_widget_get_window (widget),
 520                             allocation->x + border_width,
 521                             allocation->y + border_width,
 522                             allocation->width - border_width * 2,
 523                             allocation->height - border_width * 2);
 524
 525   start_y = 0;
 526
 527   if (offscreen_box->child1 && gtk_widget_get_visible (offscreen_box->child1))
 528     {
 529       GtkRequisition child_requisition;
 530       GtkAllocation child_allocation;
 531
 532       gtk_size_request_get_size (GTK_SIZE_REQUEST (offscreen_box->child1),
 533                                  &child_requisition, NULL);
 534       child_allocation.x = child_requisition.width * (CHILD1_SIZE_SCALE - 1.0) / 2;
 535       child_allocation.y = start_y + child_requisition.height * (CHILD1_SIZE_SCALE - 1.0) / 2;
 536       child_allocation.width = MAX (1, (gint) allocation->width - 2 * border_width);
 537       child_allocation.height = child_requisition.height;
 538
 539       start_y += CHILD1_SIZE_SCALE * child_requisition.height;
 540
 541       if (gtk_widget_get_realized (widget))
 542         gdk_window_move_resize (offscreen_box->offscreen_window1,
 543                                 child_allocation.x,
 544                                 child_allocation.y,
 545                                 child_allocation.width,
 546                                 child_allocation.height);
 547
 548       child_allocation.x = child_allocation.y = 0;
 549       gtk_widget_size_allocate (offscreen_box->child1, &child_allocation);
 550     }
 551
 552   if (offscreen_box->child2 && gtk_widget_get_visible (offscreen_box->child2))
 553     {
 554       GtkRequisition child_requisition;
 555       GtkAllocation child_allocation;
 556
 557       gtk_size_request_get_size (GTK_SIZE_REQUEST (offscreen_box->child2),
 558                                  &child_requisition, NULL);
 559       child_allocation.x = child_requisition.width * (CHILD2_SIZE_SCALE - 1.0) / 2;
 560       child_allocation.y = start_y + child_requisition.height * (CHILD2_SIZE_SCALE - 1.0) / 2;
 561       child_allocation.width = MAX (1, (gint) allocation->width - 2 * border_width);
 562       child_allocation.height = child_requisition.height;
 563
 564       start_y += CHILD2_SIZE_SCALE * child_requisition.height;
 565
 566       if (gtk_widget_get_realized (widget))
 567         gdk_window_move_resize (offscreen_box->offscreen_window2,
 568                                 child_allocation.x,
 569                                 child_allocation.y,
 570                                 child_allocation.width,
 571                                 child_allocation.height);
 572
 573       child_allocation.x = child_allocation.y = 0;
 574       gtk_widget_size_allocate (offscreen_box->child2, &child_allocation);
 575     }
 576 }
 577
 578 static gboolean
 579 gtk_offscreen_box_damage (GtkWidget      *widget,
 580                           GdkEventExpose *event)
 581 {
 582   gdk_window_invalidate_rect (gtk_widget_get_window (widget),
 583                               NULL, FALSE);
 584
 585   return TRUE;
 586 }
 587
 588 static gboolean
 589 gtk_offscreen_box_draw (GtkWidget *widget,
 590                         cairo_t   *cr)
 591 {
 592   GtkOffscreenBox *offscreen_box = GTK_OFFSCREEN_BOX (widget);
 593   GdkWindow *window;
 594
 595   window = gtk_widget_get_window (widget);
 596   if (gtk_cairo_should_draw_window (cr, window))
 597     {
 598       cairo_surface_t *surface;
 599       GtkAllocation child_area;
 600
 601       if (offscreen_box->child1 && gtk_widget_get_visible (offscreen_box->child1))
 602         {
 603           surface = gdk_offscreen_window_get_surface (offscreen_box->offscreen_window1);
 604
 605           cairo_set_source_surface (cr, surface, 0, 0);
 606           cairo_paint (cr);
 607
 608           gtk_widget_get_allocation (offscreen_box->child1, &child_area);
 609           cairo_translate (cr, 0, child_area.height);
 610         }
 611
 612       if (offscreen_box->child2 && gtk_widget_get_visible (offscreen_box->child2))
 613         {
 614           surface = gdk_offscreen_window_get_surface (offscreen_box->offscreen_window2);
 615           gtk_widget_get_allocation (offscreen_box->child2, &child_area);
 616
 617           /* transform */
 618           cairo_translate (cr, child_area.width / 2, child_area.height / 2);
 619           cairo_rotate (cr, offscreen_box->angle);
 620           cairo_translate (cr, -child_area.width / 2, -child_area.height / 2);
 621
 622           /* paint */
 623           cairo_set_source_surface (cr, surface, 0, 0);
 624           cairo_paint (cr);
 625         }
 626     }
 627   else if (gtk_cairo_should_draw_window (cr, offscreen_box->offscreen_window1))
 628     {
 629       gtk_paint_flat_box (gtk_widget_get_style (widget), cr,
 630                           GTK_STATE_NORMAL, GTK_SHADOW_NONE,
 631                           widget, "blah",
 632                           0, 0,
 633                           gdk_window_get_width (offscreen_box->offscreen_window1),
 634                           gdk_window_get_height (offscreen_box->offscreen_window1));
 635
 636       if (offscreen_box->child1)
 637         gtk_container_propagate_draw (GTK_CONTAINER (widget),
 638                                       offscreen_box->child1,
 639                                       cr);
 640     }
 641   else if (gtk_cairo_should_draw_window (cr, offscreen_box->offscreen_window2))
 642     {
 643       gtk_paint_flat_box (gtk_widget_get_style (widget), cr,
 644                           GTK_STATE_NORMAL, GTK_SHADOW_NONE,
 645                           widget, "blah",
 646                           0, 0,
 647                           gdk_window_get_width (offscreen_box->offscreen_window2),
 648                           gdk_window_get_height (offscreen_box->offscreen_window2));
 649
 650       if (offscreen_box->child2)
 651         gtk_container_propagate_draw (GTK_CONTAINER (widget),
 652                                       offscreen_box->child2,
 653                                       cr);
 654     }
 655
 656   return FALSE;
 657 }