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don't call ::GetSystemMetrics() unnecessarily in wxGetHiconSize()
[wxWidgets.git] / src / gtk / win_gtk.c
1 /* ///////////////////////////////////////////////////////////////////////////
2 // Name: src/gtk/win_gtk.c
3 // Purpose: Native GTK+ widget for wxWidgets, based on GtkLayout and
4 // GtkFixed. It makes use of the gravity window property and
5 // therefore does not work with GTK 1.0.
6 // Author: Robert Roebling
7 // Id: $Id$
8 // Copyright: (c) 1998 Robert Roebling
9 // Licence: wxWidgets licence
10 /////////////////////////////////////////////////////////////////////////// */
11
12 #ifdef VMS
13 #define XCheckIfEvent XCHECKIFEVENT
14 #endif
15
16 #include "wx/platform.h"
17 #include "wx/gtk/win_gtk.h"
18
19 #ifdef __cplusplus
20 extern "C" {
21 #endif /* __cplusplus */
22
23 typedef struct _GtkPizzaAdjData GtkPizzaAdjData;
24
25 struct _GtkPizzaAdjData
26 {
27 gint dx;
28 gint dy;
29 };
30
31 static void gtk_pizza_class_init (GtkPizzaClass *klass);
32 static void gtk_pizza_init (GtkPizza *pizza);
33
34 static void gtk_pizza_realize (GtkWidget *widget);
35 static void gtk_pizza_unrealize (GtkWidget *widget);
36
37 static void gtk_pizza_map (GtkWidget *widget);
38
39 static void gtk_pizza_size_request (GtkWidget *widget,
40 GtkRequisition *requisition);
41 static void gtk_pizza_size_allocate (GtkWidget *widget,
42 GtkAllocation *allocation);
43 static gint gtk_pizza_expose (GtkWidget *widget,
44 GdkEventExpose *event);
45 static void gtk_pizza_style_set (GtkWidget *widget,
46 GtkStyle *previous_style);
47 static void gtk_pizza_add (GtkContainer *container,
48 GtkWidget *widget);
49 static void gtk_pizza_remove (GtkContainer *container,
50 GtkWidget *widget);
51 static void gtk_pizza_forall (GtkContainer *container,
52 gboolean include_internals,
53 GtkCallback callback,
54 gpointer callback_data);
55
56 static void gtk_pizza_allocate_child (GtkPizza *pizza,
57 GtkPizzaChild *child);
58 static void gtk_pizza_adjust_allocations_recurse (GtkWidget *widget,
59 gpointer cb_data);
60
61 static GtkType gtk_pizza_child_type (GtkContainer *container);
62
63 static void gtk_pizza_scroll_set_adjustments (GtkPizza *pizza,
64 GtkAdjustment *hadj,
65 GtkAdjustment *vadj);
66
67 /* static */
68 GtkContainerClass *pizza_parent_class = NULL;
69
70 GtkType
71 gtk_pizza_get_type ()
72 {
73 static GtkType pizza_type = 0;
74
75 if (!pizza_type)
76 {
77 static const GTypeInfo pizza_info =
78 {
79 sizeof (GtkPizzaClass),
80 NULL, /* base_init */
81 NULL, /* base_finalize */
82 (GClassInitFunc) gtk_pizza_class_init,
83 NULL, /* class_finalize */
84 NULL, /* class_data */
85 sizeof (GtkPizza),
86 16, /* n_preallocs */
87 (GInstanceInitFunc) gtk_pizza_init,
88 };
89 pizza_type = g_type_register_static (GTK_TYPE_CONTAINER, "GtkPizza", &pizza_info, (GTypeFlags)0);
90 }
91
92 return pizza_type;
93 }
94
95 /* Marshaller needed for set_scroll_adjustments signal,
96 generated with GLib-2.4.6 glib-genmarshal */
97 #define g_marshal_value_peek_object(v) g_value_get_object (v)
98 static void
99 g_cclosure_user_marshal_VOID__OBJECT_OBJECT (GClosure *closure,
100 GValue *return_value,
101 guint n_param_values,
102 const GValue *param_values,
103 gpointer invocation_hint,
104 gpointer marshal_data)
105 {
106 typedef void (*GMarshalFunc_VOID__OBJECT_OBJECT) (gpointer data1,
107 gpointer arg_1,
108 gpointer arg_2,
109 gpointer data2);
110 register GMarshalFunc_VOID__OBJECT_OBJECT callback;
111 register GCClosure *cc = (GCClosure*) closure;
112 register gpointer data1, data2;
113
114 g_return_if_fail (n_param_values == 3);
115
116 if (G_CCLOSURE_SWAP_DATA (closure))
117 {
118 data1 = closure->data;
119 data2 = g_value_peek_pointer (param_values + 0);
120 }
121 else
122 {
123 data1 = g_value_peek_pointer (param_values + 0);
124 data2 = closure->data;
125 }
126 callback = (GMarshalFunc_VOID__OBJECT_OBJECT) (marshal_data ? marshal_data : cc->callback);
127
128 callback (data1,
129 g_marshal_value_peek_object (param_values + 1),
130 g_marshal_value_peek_object (param_values + 2),
131 data2);
132 }
133
134 static void
135 gtk_pizza_class_init (GtkPizzaClass *klass)
136 {
137 GtkObjectClass *object_class;
138 GtkWidgetClass *widget_class;
139 GtkContainerClass *container_class;
140
141 object_class = (GtkObjectClass*) klass;
142 widget_class = (GtkWidgetClass*) klass;
143 container_class = (GtkContainerClass*) klass;
144 pizza_parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
145
146 widget_class->map = gtk_pizza_map;
147 widget_class->realize = gtk_pizza_realize;
148 widget_class->unrealize = gtk_pizza_unrealize;
149 widget_class->size_request = gtk_pizza_size_request;
150 widget_class->size_allocate = gtk_pizza_size_allocate;
151 widget_class->expose_event = gtk_pizza_expose;
152 widget_class->style_set = gtk_pizza_style_set;
153
154 container_class->add = gtk_pizza_add;
155 container_class->remove = gtk_pizza_remove;
156 container_class->forall = gtk_pizza_forall;
157
158 container_class->child_type = gtk_pizza_child_type;
159
160 klass->set_scroll_adjustments = gtk_pizza_scroll_set_adjustments;
161
162 widget_class->set_scroll_adjustments_signal =
163 g_signal_new(
164 "set_scroll_adjustments",
165 G_TYPE_FROM_CLASS(object_class),
166 G_SIGNAL_RUN_LAST,
167 G_STRUCT_OFFSET(GtkPizzaClass, set_scroll_adjustments),
168 NULL,
169 NULL,
170 g_cclosure_user_marshal_VOID__OBJECT_OBJECT,
171 G_TYPE_NONE,
172 2,
173 GTK_TYPE_ADJUSTMENT,
174 GTK_TYPE_ADJUSTMENT);
175 }
176
177 static GtkType
178 gtk_pizza_child_type (GtkContainer *container)
179 {
180 return GTK_TYPE_WIDGET;
181 }
182
183 static void
184 gtk_pizza_init (GtkPizza *pizza)
185 {
186 GTK_WIDGET_UNSET_FLAGS (pizza, GTK_NO_WINDOW);
187
188 pizza->shadow_type = GTK_MYSHADOW_NONE;
189
190 pizza->children = NULL;
191
192 pizza->bin_window = NULL;
193
194 pizza->m_xoffset = 0;
195 pizza->m_yoffset = 0;
196
197 pizza->m_width = -1;
198
199 pizza->external_expose = FALSE;
200 }
201
202 GtkWidget*
203 gtk_pizza_new ()
204 {
205 GtkPizza *pizza;
206
207 pizza = g_object_new (gtk_pizza_get_type (), NULL);
208
209 return GTK_WIDGET (pizza);
210 }
211
212 gint gtk_pizza_get_xoffset (GtkPizza *pizza)
213 {
214 g_return_val_if_fail ( (pizza != NULL), -1 );
215 g_return_val_if_fail ( (GTK_IS_PIZZA (pizza)), -1 );
216
217 return pizza->m_xoffset;
218 }
219
220 gint gtk_pizza_get_yoffset (GtkPizza *pizza)
221 {
222 g_return_val_if_fail ( (pizza != NULL), -1 );
223 g_return_val_if_fail ( (GTK_IS_PIZZA (pizza)), -1 );
224
225 return pizza->m_yoffset;
226 }
227
228 void gtk_pizza_set_xoffset (GtkPizza *pizza, gint xoffset)
229 {
230 g_return_if_fail (pizza != NULL);
231 g_return_if_fail (GTK_IS_PIZZA (pizza));
232
233 pizza->m_xoffset = xoffset;
234 // do something
235 }
236
237 void gtk_pizza_set_yoffset (GtkPizza *pizza, gint yoffset)
238 {
239 g_return_if_fail (pizza != NULL);
240 g_return_if_fail (GTK_IS_PIZZA (pizza));
241
242 pizza->m_xoffset = yoffset;
243 // do something
244 }
245
246 static void
247 gtk_pizza_scroll_set_adjustments (GtkPizza *pizza,
248 GtkAdjustment *hadj,
249 GtkAdjustment *vadj)
250 {
251 /* We handle scrolling in the wxScrolledWindow, not here. */
252 }
253
254 void
255 gtk_pizza_set_shadow_type (GtkPizza *pizza,
256 GtkMyShadowType type)
257 {
258 g_return_if_fail (pizza != NULL);
259 g_return_if_fail (GTK_IS_PIZZA (pizza));
260
261 if (pizza->shadow_type != type)
262 {
263 pizza->shadow_type = type;
264
265 if (GTK_WIDGET_VISIBLE (pizza))
266 {
267 gtk_widget_size_allocate (GTK_WIDGET (pizza), &(GTK_WIDGET (pizza)->allocation));
268 gtk_widget_queue_draw (GTK_WIDGET (pizza));
269 }
270 }
271 }
272
273 void
274 gtk_pizza_set_external (GtkPizza *pizza,
275 gboolean expose)
276 {
277 g_return_if_fail (pizza != NULL);
278 g_return_if_fail (GTK_IS_PIZZA (pizza));
279
280 pizza->external_expose = expose;
281 }
282
283 void
284 gtk_pizza_put (GtkPizza *pizza,
285 GtkWidget *widget,
286 gint x,
287 gint y,
288 gint width,
289 gint height)
290 {
291 GtkPizzaChild *child_info;
292
293 g_return_if_fail (pizza != NULL);
294 g_return_if_fail (GTK_IS_PIZZA (pizza));
295 g_return_if_fail (widget != NULL);
296
297 if (gtk_widget_get_direction( GTK_WIDGET(pizza) ) == GTK_TEXT_DIR_RTL)
298 {
299 // reverse horizontal placement
300 x = pizza->m_width - x - width;
301 }
302
303 child_info = g_new (GtkPizzaChild, 1);
304
305 child_info->widget = widget;
306 child_info->x = x;
307 child_info->y = y;
308 child_info->width = width;
309 child_info->height = height;
310
311 if (GTK_IS_PIZZA(widget))
312 GTK_PIZZA(widget)->m_width = width;
313
314 pizza->children = g_list_append (pizza->children, child_info);
315
316 if (GTK_WIDGET_REALIZED (pizza))
317 gtk_widget_set_parent_window (widget, pizza->bin_window);
318
319 gtk_widget_set_parent (widget, GTK_WIDGET (pizza));
320
321 gtk_widget_set_size_request (widget, width, height);
322 }
323
324 void
325 gtk_pizza_set_size (GtkPizza *pizza,
326 GtkWidget *widget,
327 gint x,
328 gint y,
329 gint width,
330 gint height)
331 {
332 GtkPizzaChild *child;
333 GList *children;
334
335 g_return_if_fail (pizza != NULL);
336 g_return_if_fail (GTK_IS_PIZZA (pizza));
337 g_return_if_fail (widget != NULL);
338
339 #ifndef WX_WARN_ILLEGAL_SETSIZE
340 /* this really shouldn't happen -- but it does, a lot, right now and we
341 can't pass negative values to gtk_widget_set_size_request() without getting
342 a warning printed out, so filter them out here */
343 if ( width < 0 )
344 width = 0;
345 if ( height < 0 )
346 height = 0;
347 #endif
348
349 children = pizza->children;
350 while (children)
351 {
352 child = children->data;
353 children = children->next;
354
355 if (child->widget == widget)
356 {
357 gint new_x = x;
358 if (gtk_widget_get_direction( GTK_WIDGET(pizza) ) == GTK_TEXT_DIR_RTL)
359 {
360 // reverse horizontal placement
361 new_x = pizza->m_width - new_x - width;
362 }
363
364 if ((child->x == new_x) &&
365 (child->y == y) &&
366 (child->width == width) &&
367 (child->height == height)) return;
368
369 child->x = new_x;
370 child->y = y;
371 child->width = width;
372 child->height = height;
373
374 if (GTK_IS_PIZZA(widget))
375 GTK_PIZZA(widget)->m_width = width;
376
377 gtk_widget_set_size_request (widget, width, height);
378
379 return;
380 }
381 }
382 }
383
384 static void
385 gtk_pizza_map (GtkWidget *widget)
386 {
387 GtkPizza *pizza;
388 GtkPizzaChild *child;
389 GList *children;
390
391 g_return_if_fail (widget != NULL);
392 g_return_if_fail (GTK_IS_PIZZA (widget));
393
394 GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
395 pizza = GTK_PIZZA (widget);
396
397 children = pizza->children;
398 while (children)
399 {
400 child = children->data;
401 children = children->next;
402
403 if ( GTK_WIDGET_VISIBLE (child->widget) &&
404 !GTK_WIDGET_MAPPED (child->widget) )
405 {
406 gtk_widget_map (child->widget);
407 }
408 }
409
410 gdk_window_show (widget->window);
411 gdk_window_show (pizza->bin_window);
412 }
413
414 static void
415 gtk_pizza_realize (GtkWidget *widget)
416 {
417 GtkPizza *pizza;
418 GdkWindowAttr attributes;
419 gint attributes_mask;
420 GtkPizzaChild *child;
421 GList *children;
422
423 g_return_if_fail (widget != NULL);
424 g_return_if_fail (GTK_IS_PIZZA (widget));
425
426 pizza = GTK_PIZZA (widget);
427 GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
428
429 attributes.window_type = GDK_WINDOW_CHILD;
430
431 attributes.x = widget->allocation.x;
432 attributes.y = widget->allocation.y;
433 attributes.width = widget->allocation.width;
434 attributes.height = widget->allocation.height;
435
436 #ifndef __WXUNIVERSAL__
437 if (pizza->shadow_type == GTK_MYSHADOW_NONE)
438 {
439 /* no border, no changes to sizes */
440 }
441 else if (pizza->shadow_type == GTK_MYSHADOW_THIN)
442 {
443 /* GTK_MYSHADOW_THIN == wxSIMPLE_BORDER */
444 attributes.x += 1;
445 attributes.y += 1;
446 attributes.width -= 2;
447 attributes.height -= 2;
448 }
449 else
450 {
451 /* GTK_MYSHADOW_IN == wxSUNKEN_BORDER */
452 /* GTK_MYSHADOW_OUT == wxRAISED_BORDER */
453 attributes.x += 2;
454 attributes.y += 2;
455 attributes.width -= 4;
456 attributes.height -= 4;
457 }
458 #endif /* __WXUNIVERSAL__ */
459
460 /* minimal size */
461 if (attributes.width < 2) attributes.width = 2;
462 if (attributes.height < 2) attributes.height = 2;
463
464 attributes.wclass = GDK_INPUT_OUTPUT;
465 attributes.visual = gtk_widget_get_visual (widget);
466 attributes.colormap = gtk_widget_get_colormap (widget);
467 attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK;
468 attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
469
470 widget->window = gdk_window_new(gtk_widget_get_parent_window (widget),
471 &attributes, attributes_mask);
472 gdk_window_set_user_data (widget->window, widget);
473
474 attributes.x = 0;
475 attributes.y = 0;
476
477 attributes.event_mask = gtk_widget_get_events (widget);
478 attributes.event_mask |= GDK_EXPOSURE_MASK |
479 GDK_SCROLL_MASK |
480 GDK_POINTER_MOTION_MASK |
481 GDK_POINTER_MOTION_HINT_MASK |
482 GDK_BUTTON_MOTION_MASK |
483 GDK_BUTTON1_MOTION_MASK |
484 GDK_BUTTON2_MOTION_MASK |
485 GDK_BUTTON3_MOTION_MASK |
486 GDK_BUTTON_PRESS_MASK |
487 GDK_BUTTON_RELEASE_MASK |
488 GDK_KEY_PRESS_MASK |
489 GDK_KEY_RELEASE_MASK |
490 GDK_ENTER_NOTIFY_MASK |
491 GDK_LEAVE_NOTIFY_MASK |
492 GDK_FOCUS_CHANGE_MASK;
493
494 pizza->bin_window = gdk_window_new(widget->window,
495 &attributes, attributes_mask);
496 gdk_window_set_user_data (pizza->bin_window, widget);
497
498 widget->style = gtk_style_attach (widget->style, widget->window);
499 gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
500 gtk_style_set_background (widget->style, pizza->bin_window, GTK_STATE_NORMAL );
501
502 /*
503 gdk_window_set_back_pixmap( widget->window, NULL, FALSE );
504 gdk_window_set_back_pixmap( pizza->bin_window, NULL, FALSE );
505 */
506
507 /* cannot be done before realisation */
508 children = pizza->children;
509 while (children)
510 {
511 child = children->data;
512 children = children->next;
513
514 gtk_widget_set_parent_window (child->widget, pizza->bin_window);
515 }
516 }
517
518 static void
519 gtk_pizza_unrealize (GtkWidget *widget)
520 {
521 GtkPizza *pizza;
522
523 g_return_if_fail (widget != NULL);
524 g_return_if_fail (GTK_IS_PIZZA (widget));
525
526 pizza = GTK_PIZZA (widget);
527
528 gdk_window_set_user_data (pizza->bin_window, NULL);
529 gdk_window_destroy (pizza->bin_window);
530 pizza->bin_window = NULL;
531
532 if (GTK_WIDGET_CLASS (pizza_parent_class)->unrealize)
533 (* GTK_WIDGET_CLASS (pizza_parent_class)->unrealize) (widget);
534 }
535
536 static void
537 gtk_pizza_size_request (GtkWidget *widget,
538 GtkRequisition *requisition)
539 {
540 GtkPizza *pizza;
541 GtkPizzaChild *child;
542 GList *children;
543 GtkRequisition child_requisition;
544
545 g_return_if_fail (widget != NULL);
546 g_return_if_fail (GTK_IS_PIZZA (widget));
547 g_return_if_fail (requisition != NULL);
548
549 pizza = GTK_PIZZA (widget);
550
551 children = pizza->children;
552 while (children)
553 {
554 child = children->data;
555 children = children->next;
556
557 if (GTK_WIDGET_VISIBLE (child->widget))
558 {
559 gtk_widget_size_request (child->widget, &child_requisition);
560 }
561 }
562
563 /* request very little, I'm not sure if requesting nothing
564 will always have positive effects on stability... */
565 requisition->width = 2;
566 requisition->height = 2;
567 }
568
569 static void
570 gtk_pizza_size_allocate (GtkWidget *widget,
571 GtkAllocation *allocation)
572 {
573 GtkPizza *pizza;
574 gint border;
575 gint x,y,w,h;
576 GtkPizzaChild *child;
577 GList *children;
578
579 g_return_if_fail (widget != NULL);
580 g_return_if_fail (GTK_IS_PIZZA(widget));
581 g_return_if_fail (allocation != NULL);
582
583 pizza = GTK_PIZZA (widget);
584
585 widget->allocation = *allocation;
586
587 if (pizza->shadow_type == GTK_MYSHADOW_NONE)
588 border = 0;
589 else
590 if (pizza->shadow_type == GTK_MYSHADOW_THIN)
591 border = 1;
592 else
593 border = 2;
594
595 x = allocation->x + border;
596 y = allocation->y + border;
597 w = allocation->width - border*2;
598 h = allocation->height - border*2;
599 if (w < 0)
600 w = 0;
601 if (h < 0)
602 h = 0;
603
604 if (GTK_WIDGET_REALIZED (widget))
605 {
606 gdk_window_move_resize( widget->window, x, y, w, h );
607 gdk_window_move_resize( pizza->bin_window, 0, 0, w, h );
608 }
609
610 children = pizza->children;
611 while (children)
612 {
613 child = children->data;
614 children = children->next;
615
616 gtk_pizza_allocate_child (pizza, child);
617 }
618 }
619
620 static gint
621 gtk_pizza_expose (GtkWidget *widget,
622 GdkEventExpose *event)
623 {
624 GtkPizza *pizza;
625
626 g_return_val_if_fail (widget != NULL, FALSE);
627 g_return_val_if_fail (GTK_IS_PIZZA (widget), FALSE);
628 g_return_val_if_fail (event != NULL, FALSE);
629
630 pizza = GTK_PIZZA (widget);
631
632 if (event->window != pizza->bin_window)
633 return FALSE;
634
635 /* We handle all expose events in window.cpp now. */
636 if (pizza->external_expose)
637 return FALSE;
638
639 (* GTK_WIDGET_CLASS (pizza_parent_class)->expose_event) (widget, event);
640
641 return FALSE;
642 }
643
644 static void
645 gtk_pizza_style_set(GtkWidget *widget, GtkStyle *previous_style)
646 {
647 if (GTK_WIDGET_REALIZED(widget))
648 {
649 gtk_style_set_background(widget->style, widget->window, GTK_STATE_NORMAL);
650 gtk_style_set_background(widget->style, GTK_PIZZA(widget)->bin_window, GTK_STATE_NORMAL );
651 }
652
653 (* GTK_WIDGET_CLASS (pizza_parent_class)->style_set) (widget, previous_style);
654 }
655
656 static void
657 gtk_pizza_add (GtkContainer *container,
658 GtkWidget *widget)
659 {
660 g_return_if_fail (container != NULL);
661 g_return_if_fail (GTK_IS_PIZZA (container));
662 g_return_if_fail (widget != NULL);
663
664 gtk_pizza_put (GTK_PIZZA (container), widget, 0, 0, 20, 20 );
665 }
666
667 static void
668 gtk_pizza_remove (GtkContainer *container,
669 GtkWidget *widget)
670 {
671 GtkPizza *pizza;
672 GtkPizzaChild *child;
673 GList *children;
674
675 g_return_if_fail (container != NULL);
676 g_return_if_fail (GTK_IS_PIZZA (container));
677 g_return_if_fail (widget != NULL);
678
679 pizza = GTK_PIZZA (container);
680
681 children = pizza->children;
682 while (children)
683 {
684 child = children->data;
685
686 if (child->widget == widget)
687 {
688 gtk_widget_unparent (widget);
689
690 /* security checks */
691 g_return_if_fail (GTK_IS_WIDGET (widget));
692
693 pizza->children = g_list_remove_link (pizza->children, children);
694 g_list_free (children);
695 g_free (child);
696
697 /* security checks */
698 g_return_if_fail (GTK_IS_WIDGET (widget));
699
700 break;
701 }
702
703 children = children->next;
704 }
705 }
706
707 static void
708 gtk_pizza_forall (GtkContainer *container,
709 gboolean include_internals,
710 GtkCallback callback,
711 gpointer callback_data)
712 {
713 GtkPizza *pizza;
714 GtkPizzaChild *child;
715 GList *children;
716
717 g_return_if_fail (container != NULL);
718 g_return_if_fail (GTK_IS_PIZZA (container));
719 g_return_if_fail (callback != (GtkCallback)NULL);
720
721 pizza = GTK_PIZZA (container);
722
723 children = pizza->children;
724 while (children)
725 {
726 child = children->data;
727 children = children->next;
728
729 (* callback) (child->widget, callback_data);
730 }
731 }
732
733 static void
734 gtk_pizza_allocate_child (GtkPizza *pizza,
735 GtkPizzaChild *child)
736 {
737 GtkAllocation allocation;
738 GtkRequisition requisition;
739
740 allocation.x = child->x - pizza->m_xoffset;
741 allocation.y = child->y - pizza->m_yoffset;
742 gtk_widget_get_child_requisition (child->widget, &requisition);
743 allocation.width = requisition.width;
744 allocation.height = requisition.height;
745
746 gtk_widget_size_allocate (child->widget, &allocation);
747 }
748
749 static void
750 gtk_pizza_adjust_allocations_recurse (GtkWidget *widget,
751 gpointer cb_data)
752 {
753 GtkPizzaAdjData *data = cb_data;
754
755 widget->allocation.x += data->dx;
756 widget->allocation.y += data->dy;
757
758 if (GTK_WIDGET_NO_WINDOW (widget) && GTK_IS_CONTAINER (widget))
759 {
760 gtk_container_forall (GTK_CONTAINER (widget),
761 gtk_pizza_adjust_allocations_recurse,
762 cb_data);
763 }
764 }
765
766 static void
767 gtk_pizza_adjust_allocations (GtkPizza *pizza,
768 gint dx,
769 gint dy)
770 {
771 GList *tmp_list;
772 GtkPizzaAdjData data;
773
774 data.dx = dx;
775 data.dy = dy;
776
777 tmp_list = pizza->children;
778 while (tmp_list)
779 {
780 GtkPizzaChild *child = tmp_list->data;
781 tmp_list = tmp_list->next;
782
783 child->widget->allocation.x += dx;
784 child->widget->allocation.y += dy;
785
786 if (GTK_WIDGET_NO_WINDOW (child->widget) &&
787 GTK_IS_CONTAINER (child->widget))
788 {
789 gtk_container_forall (GTK_CONTAINER (child->widget),
790 gtk_pizza_adjust_allocations_recurse,
791 &data);
792 }
793 }
794 }
795
796 void
797 gtk_pizza_scroll (GtkPizza *pizza, gint dx, gint dy)
798 {
799 pizza->m_xoffset += dx;
800 pizza->m_yoffset += dy;
801
802 gtk_pizza_adjust_allocations (pizza, -dx, -dy);
803
804 if (pizza->bin_window)
805 gdk_window_scroll( pizza->bin_window, -dx, -dy );
806 }
807
808 #ifdef __cplusplus
809 }
810 #endif /* __cplusplus */
wxWidgets (Impactor)