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1/* ///////////////////////////////////////////////////////////////////////////
2// Name: src/gtk1/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: wxWindows licence
10/////////////////////////////////////////////////////////////////////////// */
11
12#ifdef VMS
13#define XCheckIfEvent XCHECKIFEVENT
14#endif
15
16#include "wx/platform.h"
17#include "wx/gtk1/win_gtk.h"
18#include "gtk/gtksignal.h"
19#include "gtk/gtkprivate.h"
20#include "gdk/gdkx.h"
21
22#ifdef __cplusplus
23extern "C" {
24#endif /* __cplusplus */
25
26#include <X11/Xlib.h>
27#include <X11/Xutil.h>
28#include <X11/Xatom.h>
29
30#define IS_ONSCREEN(x,y) ((x >= G_MINSHORT) && (x <= G_MAXSHORT) && \
31 (y >= G_MINSHORT) && (y <= G_MAXSHORT))
32
33
34typedef struct _GtkPizzaAdjData GtkPizzaAdjData;
35
36struct _GtkPizzaAdjData
37{
38 gint dx;
39 gint dy;
40};
41
42static void gtk_pizza_class_init (GtkPizzaClass *klass);
43static void gtk_pizza_init (GtkPizza *pizza);
44
45static void gtk_pizza_realize (GtkWidget *widget);
46static void gtk_pizza_unrealize (GtkWidget *widget);
47
48static void gtk_pizza_map (GtkWidget *widget);
49
50static void gtk_pizza_size_request (GtkWidget *widget,
51 GtkRequisition *requisition);
52static void gtk_pizza_size_allocate (GtkWidget *widget,
53 GtkAllocation *allocation);
54static void gtk_pizza_draw (GtkWidget *widget,
55 GdkRectangle *area);
56static gint gtk_pizza_expose (GtkWidget *widget,
57 GdkEventExpose *event);
58static void gtk_pizza_style_set (GtkWidget *widget,
59 GtkStyle *previous_style);
60static void gtk_pizza_add (GtkContainer *container,
61 GtkWidget *widget);
62static void gtk_pizza_remove (GtkContainer *container,
63 GtkWidget *widget);
64static void gtk_pizza_forall (GtkContainer *container,
65 gboolean include_internals,
66 GtkCallback callback,
67 gpointer callback_data);
68
69static void gtk_pizza_allocate_child (GtkPizza *pizza,
70 GtkPizzaChild *child);
71static void gtk_pizza_adjust_allocations_recurse (GtkWidget *widget,
72 gpointer cb_data);
73
74static void gtk_pizza_position_child (GtkPizza *pizza,
75 GtkPizzaChild *child);
76static void gtk_pizza_position_children (GtkPizza *pizza);
77
78static GdkFilterReturn gtk_pizza_filter (GdkXEvent *gdk_xevent,
79 GdkEvent *event,
80 gpointer data);
81static GdkFilterReturn gtk_pizza_main_filter (GdkXEvent *gdk_xevent,
82 GdkEvent *event,
83 gpointer data);
84
85static GtkType gtk_pizza_child_type (GtkContainer *container);
86
87static void gtk_pizza_scroll_set_adjustments (GtkPizza *pizza,
88 GtkAdjustment *hadj,
89 GtkAdjustment *vadj);
90
91
92static GtkContainerClass *pizza_parent_class = NULL;
93
94static gboolean gravity_works;
95
96GtkType
97gtk_pizza_get_type ()
98{
99 static GtkType pizza_type = 0;
100
101 if (!pizza_type)
102 {
103 GtkTypeInfo pizza_info =
104 {
105 "GtkPizza",
106 sizeof (GtkPizza),
107 sizeof (GtkPizzaClass),
108 (GtkClassInitFunc) gtk_pizza_class_init,
109 (GtkObjectInitFunc) gtk_pizza_init,
110 /* reserved_1 */ NULL,
111 /* reserved_2 */ NULL,
112 (GtkClassInitFunc) NULL,
113 };
114 pizza_type = gtk_type_unique (gtk_container_get_type (), &pizza_info);
115 }
116
117 return pizza_type;
118}
119
120static void
121gtk_pizza_class_init (GtkPizzaClass *klass)
122{
123 GtkObjectClass *object_class;
124 GtkWidgetClass *widget_class;
125 GtkContainerClass *container_class;
126
127 object_class = (GtkObjectClass*) klass;
128 widget_class = (GtkWidgetClass*) klass;
129 container_class = (GtkContainerClass*) klass;
130 pizza_parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
131
132 widget_class->map = gtk_pizza_map;
133 widget_class->realize = gtk_pizza_realize;
134 widget_class->unrealize = gtk_pizza_unrealize;
135 widget_class->size_request = gtk_pizza_size_request;
136 widget_class->size_allocate = gtk_pizza_size_allocate;
137 widget_class->draw = gtk_pizza_draw;
138 widget_class->expose_event = gtk_pizza_expose;
139 widget_class->style_set = gtk_pizza_style_set;
140
141 container_class->add = gtk_pizza_add;
142 container_class->remove = gtk_pizza_remove;
143 container_class->forall = gtk_pizza_forall;
144
145 container_class->child_type = gtk_pizza_child_type;
146
147 klass->set_scroll_adjustments = gtk_pizza_scroll_set_adjustments;
148
149 widget_class->set_scroll_adjustments_signal =
150 gtk_signal_new ("set_scroll_adjustments",
151 GTK_RUN_LAST,
152 object_class->type,
153 GTK_SIGNAL_OFFSET (GtkPizzaClass, set_scroll_adjustments),
154 gtk_marshal_NONE__POINTER_POINTER,
155 GTK_TYPE_NONE, 2, GTK_TYPE_ADJUSTMENT, GTK_TYPE_ADJUSTMENT);
156}
157
158static GtkType
159gtk_pizza_child_type (GtkContainer *container)
160{
161 return GTK_TYPE_WIDGET;
162}
163
164static void
165gtk_pizza_init (GtkPizza *pizza)
166{
167 GTK_WIDGET_UNSET_FLAGS (pizza, GTK_NO_WINDOW);
168
169 pizza->shadow_type = GTK_MYSHADOW_NONE;
170
171 pizza->children = NULL;
172
173 pizza->width = 20;
174 pizza->height = 20;
175
176 pizza->bin_window = NULL;
177
178 pizza->xoffset = 0;
179 pizza->yoffset = 0;
180
181 pizza->configure_serial = 0;
182 pizza->scroll_x = 0;
183 pizza->scroll_y = 0;
184 pizza->visibility = GDK_VISIBILITY_PARTIAL;
185
186 pizza->clear_on_draw = TRUE;
187 pizza->use_filter = TRUE;
188 pizza->external_expose = FALSE;
189}
190
191GtkWidget*
192gtk_pizza_new ()
193{
194 GtkPizza *pizza;
195
196 pizza = gtk_type_new (gtk_pizza_get_type ());
197
198 return GTK_WIDGET (pizza);
199}
200
201static void
202gtk_pizza_scroll_set_adjustments (GtkPizza *pizza,
203 GtkAdjustment *hadj,
204 GtkAdjustment *vadj)
205{
206 /* We handle scrolling in the wxScrolledWindow, not here. */
207}
208
209void
210gtk_pizza_set_shadow_type (GtkPizza *pizza,
211 GtkMyShadowType type)
212{
213 g_return_if_fail (pizza != NULL);
214 g_return_if_fail (GTK_IS_PIZZA (pizza));
215
216 if ((GtkMyShadowType) pizza->shadow_type != type)
217 {
218 pizza->shadow_type = type;
219
220 if (GTK_WIDGET_VISIBLE (pizza))
221 {
222 gtk_widget_size_allocate (GTK_WIDGET (pizza), &(GTK_WIDGET (pizza)->allocation));
223 gtk_widget_queue_draw (GTK_WIDGET (pizza));
224 }
225 }
226}
227
228void
229gtk_pizza_set_clear (GtkPizza *pizza,
230 gboolean clear)
231{
232 g_return_if_fail (pizza != NULL);
233 g_return_if_fail (GTK_IS_PIZZA (pizza));
234
235 pizza->clear_on_draw = clear;
236}
237
238void
239gtk_pizza_set_filter (GtkPizza *pizza,
240 gboolean use)
241{
242 g_return_if_fail (pizza != NULL);
243 g_return_if_fail (GTK_IS_PIZZA (pizza));
244
245 pizza->use_filter = use;
246}
247
248void
249gtk_pizza_set_external (GtkPizza *pizza,
250 gboolean expose)
251{
252 g_return_if_fail (pizza != NULL);
253 g_return_if_fail (GTK_IS_PIZZA (pizza));
254
255 pizza->external_expose = expose;
256}
257
258void
259gtk_pizza_put (GtkPizza *pizza,
260 GtkWidget *widget,
261 gint x,
262 gint y,
263 gint width,
264 gint height)
265{
266 GtkPizzaChild *child_info;
267
268 g_return_if_fail (pizza != NULL);
269 g_return_if_fail (GTK_IS_PIZZA (pizza));
270 g_return_if_fail (widget != NULL);
271
272 child_info = g_new (GtkPizzaChild, 1);
273
274 child_info->widget = widget;
275 child_info->x = x;
276 child_info->y = y;
277 child_info->width = width;
278 child_info->height = height;
279
280 pizza->children = g_list_append (pizza->children, child_info);
281
282 if (GTK_WIDGET_REALIZED (pizza))
283 gtk_widget_set_parent_window (widget, pizza->bin_window);
284
285 gtk_widget_set_parent (widget, GTK_WIDGET (pizza));
286
287 if (!IS_ONSCREEN (x, y))
288 GTK_PRIVATE_SET_FLAG (widget, GTK_IS_OFFSCREEN);
289
290 gtk_widget_set_usize (widget, width, height);
291}
292
293void
294gtk_pizza_move (GtkPizza *pizza,
295 GtkWidget *widget,
296 gint x,
297 gint y)
298{
299 GtkPizzaChild *child;
300 GList *children;
301
302 g_return_if_fail (pizza != NULL);
303 g_return_if_fail (GTK_IS_PIZZA (pizza));
304 g_return_if_fail (widget != NULL);
305
306 children = pizza->children;
307 while (children)
308 {
309 child = children->data;
310 children = children->next;
311
312 if (child->widget == widget)
313 {
314 if ((child->x == x) && (child->y == y))
315 break;
316
317 child->x = x;
318 child->y = y;
319
320 if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (pizza))
321 gtk_widget_queue_resize (widget);
322 break;
323 }
324 }
325}
326
327void
328gtk_pizza_resize (GtkPizza *pizza,
329 GtkWidget *widget,
330 gint width,
331 gint height)
332{
333 GtkPizzaChild *child;
334 GList *children;
335
336 g_return_if_fail (pizza != NULL);
337 g_return_if_fail (GTK_IS_PIZZA (pizza));
338 g_return_if_fail (widget != NULL);
339
340 children = pizza->children;
341 while (children)
342 {
343 child = children->data;
344 children = children->next;
345
346 if (child->widget == widget)
347 {
348 if ((child->width == width) && (child->height == height))
349 break;
350
351 child->width = width;
352 child->height = height;
353
354 gtk_widget_set_usize (widget, width, height);
355
356 if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (pizza))
357 gtk_widget_queue_resize (widget);
358 break;
359 }
360 }
361}
362
363void
364gtk_pizza_set_size (GtkPizza *pizza,
365 GtkWidget *widget,
366 gint x,
367 gint y,
368 gint width,
369 gint height)
370{
371 GtkPizzaChild *child;
372 GList *children;
373
374 g_return_if_fail (pizza != NULL);
375 g_return_if_fail (GTK_IS_PIZZA (pizza));
376 g_return_if_fail (widget != NULL);
377
378 children = pizza->children;
379 while (children)
380 {
381 child = children->data;
382 children = children->next;
383
384 if (child->widget == widget)
385 {
386 if ((child->x == x) &&
387 (child->y == y) &&
388 (child->width == width) &&
389 (child->height == height)) return;
390
391 child->x = x;
392 child->y = y;
393 child->width = width;
394 child->height = height;
395
396 gtk_widget_set_usize (widget, width, height);
397
398 if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (pizza))
399 gtk_widget_queue_resize (widget);
400
401 return;
402 }
403 }
404}
405
406gint
407gtk_pizza_child_resized (GtkPizza *pizza,
408 GtkWidget *widget)
409{
410 GtkPizzaChild *child;
411 GList *children;
412
413 g_return_val_if_fail (pizza != NULL, FALSE);
414 g_return_val_if_fail (GTK_IS_PIZZA (pizza), FALSE);
415 g_return_val_if_fail (widget != NULL, FALSE);
416
417 children = pizza->children;
418 while (children)
419 {
420 child = children->data;
421 children = children->next;
422
423 if (child->widget == widget)
424 {
425 return ((child->width == widget->allocation.width) &&
426 (child->height == widget->allocation.height));
427 }
428 }
429
430 return FALSE;
431}
432
433static void
434gtk_pizza_map (GtkWidget *widget)
435{
436 GtkPizza *pizza;
437 GtkPizzaChild *child;
438 GList *children;
439
440 g_return_if_fail (widget != NULL);
441 g_return_if_fail (GTK_IS_PIZZA (widget));
442
443 GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
444 pizza = GTK_PIZZA (widget);
445
446 children = pizza->children;
447 while (children)
448 {
449 child = children->data;
450 children = children->next;
451
452 if ( GTK_WIDGET_VISIBLE (child->widget) &&
453 !GTK_WIDGET_MAPPED (child->widget) &&
454 !GTK_WIDGET_IS_OFFSCREEN (child->widget))
455 {
456 gtk_widget_map (child->widget);
457 }
458 }
459
460 gdk_window_show (widget->window);
461 gdk_window_show (pizza->bin_window);
462}
463
464static void
465gtk_pizza_realize (GtkWidget *widget)
466{
467 GtkPizza *pizza;
468 GdkWindowAttr attributes;
469 gint attributes_mask;
470 GtkPizzaChild *child;
471 GList *children;
472
473 g_return_if_fail (widget != NULL);
474 g_return_if_fail (GTK_IS_PIZZA (widget));
475
476 pizza = GTK_PIZZA (widget);
477 GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
478
479 attributes.window_type = GDK_WINDOW_CHILD;
480
481 attributes.x = widget->allocation.x;
482 attributes.y = widget->allocation.y;
483 attributes.width = widget->allocation.width;
484 attributes.height = widget->allocation.height;
485
486#ifndef __WXUNIVERSAL__
487 if (pizza->shadow_type == GTK_MYSHADOW_NONE)
488 {
489 /* no border, no changes to sizes */
490 }
491 else if (pizza->shadow_type == GTK_MYSHADOW_THIN)
492 {
493 /* GTK_MYSHADOW_THIN == wxSIMPLE_BORDER */
494 attributes.x += 1;
495 attributes.y += 1;
496 attributes.width -= 2;
497 attributes.height -= 2;
498 }
499 else
500 {
501 /* GTK_MYSHADOW_IN == wxSUNKEN_BORDER */
502 /* GTK_MYSHADOW_OUT == wxRAISED_BORDER */
503 attributes.x += 2;
504 attributes.y += 2;
505 attributes.width -= 4;
506 attributes.height -= 4;
507 }
508#endif /* __WXUNIVERSAL__ */
509
510 /* minimal size */
511 if (attributes.width < 2) attributes.width = 2;
512 if (attributes.height < 2) attributes.height = 2;
513
514 attributes.wclass = GDK_INPUT_OUTPUT;
515 attributes.visual = gtk_widget_get_visual (widget);
516 attributes.colormap = gtk_widget_get_colormap (widget);
517 attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK;
518 attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
519
520 widget->window = gdk_window_new(gtk_widget_get_parent_window (widget),
521 &attributes, attributes_mask);
522 gdk_window_set_user_data (widget->window, widget);
523
524 attributes.x = 0;
525 attributes.y = 0;
526
527 attributes.event_mask = gtk_widget_get_events (widget);
528 attributes.event_mask |= GDK_EXPOSURE_MASK |
529 GDK_POINTER_MOTION_MASK |
530 GDK_POINTER_MOTION_HINT_MASK |
531 GDK_BUTTON_MOTION_MASK |
532 GDK_BUTTON1_MOTION_MASK |
533 GDK_BUTTON2_MOTION_MASK |
534 GDK_BUTTON3_MOTION_MASK |
535 GDK_BUTTON_PRESS_MASK |
536 GDK_BUTTON_RELEASE_MASK |
537 GDK_KEY_PRESS_MASK |
538 GDK_KEY_RELEASE_MASK |
539 GDK_ENTER_NOTIFY_MASK |
540 GDK_LEAVE_NOTIFY_MASK |
541 GDK_FOCUS_CHANGE_MASK;
542
543 pizza->bin_window = gdk_window_new(widget->window,
544 &attributes, attributes_mask);
545 gdk_window_set_user_data (pizza->bin_window, widget);
546
547 widget->style = gtk_style_attach (widget->style, widget->window);
548 gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
549 gtk_style_set_background (widget->style, pizza->bin_window, GTK_STATE_NORMAL );
550
551/*
552 gdk_window_set_back_pixmap( widget->window, NULL, FALSE );
553 gdk_window_set_back_pixmap( pizza->bin_window, NULL, FALSE );
554*/
555
556 /* add filters for intercepting visibility and expose events */
557 gdk_window_add_filter (widget->window, gtk_pizza_main_filter, pizza);
558 gdk_window_add_filter (pizza->bin_window, gtk_pizza_filter, pizza);
559
560 /* we NEED gravity or we'll give up */
561 gravity_works = gdk_window_set_static_gravities (pizza->bin_window, TRUE);
562
563 /* cannot be done before realisation */
564 children = pizza->children;
565 while (children)
566 {
567 child = children->data;
568 children = children->next;
569
570 gtk_widget_set_parent_window (child->widget, pizza->bin_window);
571 }
572}
573
574static void
575gtk_pizza_unrealize (GtkWidget *widget)
576{
577 GtkPizza *pizza;
578
579 g_return_if_fail (widget != NULL);
580 g_return_if_fail (GTK_IS_PIZZA (widget));
581
582 pizza = GTK_PIZZA (widget);
583
584 gdk_window_set_user_data (pizza->bin_window, NULL);
585 gdk_window_destroy (pizza->bin_window);
586 pizza->bin_window = NULL;
587
588 if (GTK_WIDGET_CLASS (pizza_parent_class)->unrealize)
589 (* GTK_WIDGET_CLASS (pizza_parent_class)->unrealize) (widget);
590}
591
592static void
593gtk_pizza_size_request (GtkWidget *widget,
594 GtkRequisition *requisition)
595{
596 GtkPizza *pizza;
597 GtkPizzaChild *child;
598 GList *children;
599 GtkRequisition child_requisition;
600
601 g_return_if_fail (widget != NULL);
602 g_return_if_fail (GTK_IS_PIZZA (widget));
603 g_return_if_fail (requisition != NULL);
604
605 pizza = GTK_PIZZA (widget);
606
607 children = pizza->children;
608 while (children)
609 {
610 child = children->data;
611 children = children->next;
612
613 if (GTK_WIDGET_VISIBLE (child->widget))
614 {
615 gtk_widget_size_request (child->widget, &child_requisition);
616 }
617 }
618
619 /* request very little, I'm not sure if requesting nothing
620 will always have positive effects on stability... */
621 requisition->width = 2;
622 requisition->height = 2;
623}
624
625static void
626gtk_pizza_size_allocate (GtkWidget *widget,
627 GtkAllocation *allocation)
628{
629 GtkPizza *pizza;
630 gint border;
631 gint x,y,w,h;
632 GtkPizzaChild *child;
633 GList *children;
634
635 g_return_if_fail (widget != NULL);
636 g_return_if_fail (GTK_IS_PIZZA(widget));
637 g_return_if_fail (allocation != NULL);
638
639 pizza = GTK_PIZZA (widget);
640
641 widget->allocation = *allocation;
642
643 if (pizza->shadow_type == GTK_MYSHADOW_NONE)
644 border = 0;
645 else
646 if (pizza->shadow_type == GTK_MYSHADOW_THIN)
647 border = 1;
648 else
649 border = 2;
650
651 x = allocation->x + border;
652 y = allocation->y + border;
653 w = allocation->width - border*2;
654 h = allocation->height - border*2;
655
656 if (GTK_WIDGET_REALIZED (widget))
657 {
658 gdk_window_move_resize( widget->window, x, y, w, h );
659 gdk_window_move_resize( pizza->bin_window, 0, 0, w, h );
660 }
661
662 children = pizza->children;
663 while (children)
664 {
665 child = children->data;
666 children = children->next;
667
668 gtk_pizza_position_child (pizza, child);
669 gtk_pizza_allocate_child (pizza, child);
670 }
671}
672
673static void
674gtk_pizza_draw (GtkWidget *widget,
675 GdkRectangle *area)
676{
677 GtkPizza *pizza;
678 GtkPizzaChild *child;
679 GdkRectangle child_area;
680 GList *children;
681
682 g_return_if_fail (widget != NULL);
683 g_return_if_fail (GTK_IS_PIZZA (widget));
684
685 pizza = GTK_PIZZA (widget);
686
687 /* Sometimes, We handle all expose events in window.cpp now. */
688 if (pizza->external_expose)
689 return;
690
691 children = pizza->children;
692 if ( !(GTK_WIDGET_APP_PAINTABLE (widget)) &&
693 (pizza->clear_on_draw))
694 {
695 gdk_window_clear_area( pizza->bin_window,
696 area->x, area->y, area->width, area->height);
697 }
698
699 while (children)
700 {
701 child = children->data;
702 children = children->next;
703
704 if (gtk_widget_intersect (child->widget, area, &child_area))
705 gtk_widget_draw (child->widget, &child_area);
706 }
707}
708
709static gint
710gtk_pizza_expose (GtkWidget *widget,
711 GdkEventExpose *event)
712{
713 GtkPizza *pizza;
714 GtkPizzaChild *child;
715 GdkEventExpose child_event;
716 GList *children;
717
718 g_return_val_if_fail (widget != NULL, FALSE);
719 g_return_val_if_fail (GTK_IS_PIZZA (widget), FALSE);
720 g_return_val_if_fail (event != NULL, FALSE);
721
722 pizza = GTK_PIZZA (widget);
723
724 if (event->window != pizza->bin_window)
725 return FALSE;
726
727 /* We handle all expose events in window.cpp now. */
728 if (pizza->external_expose)
729 return FALSE;
730
731 children = pizza->children;
732 while (children)
733 {
734 child = children->data;
735 children = children->next;
736
737 child_event = *event;
738
739 if (GTK_WIDGET_NO_WINDOW (child->widget) &&
740 GTK_WIDGET_DRAWABLE (child->widget) &&
741 gtk_widget_intersect (child->widget, &event->area, &child_event.area))
742 {
743 gtk_widget_event (child->widget, (GdkEvent*) &child_event);
744 }
745 }
746
747 return TRUE;
748}
749
750static void
751gtk_pizza_style_set(GtkWidget *widget, GtkStyle *previous_style)
752{
753 if (GTK_WIDGET_REALIZED(widget))
754 {
755 gtk_style_set_background(widget->style, widget->window, GTK_STATE_NORMAL);
756 gtk_style_set_background(widget->style, GTK_PIZZA(widget)->bin_window, GTK_STATE_NORMAL );
757 }
758
759 (* GTK_WIDGET_CLASS (pizza_parent_class)->style_set) (widget, previous_style);
760}
761
762static void
763gtk_pizza_add (GtkContainer *container,
764 GtkWidget *widget)
765{
766 g_return_if_fail (container != NULL);
767 g_return_if_fail (GTK_IS_PIZZA (container));
768 g_return_if_fail (widget != NULL);
769
770 gtk_pizza_put (GTK_PIZZA (container), widget, 0, 0, 20, 20 );
771}
772
773static void
774gtk_pizza_remove (GtkContainer *container,
775 GtkWidget *widget)
776{
777 GtkPizza *pizza;
778 GtkPizzaChild *child;
779 GList *children;
780
781 g_return_if_fail (container != NULL);
782 g_return_if_fail (GTK_IS_PIZZA (container));
783 g_return_if_fail (widget != NULL);
784
785 pizza = GTK_PIZZA (container);
786
787 children = pizza->children;
788 while (children)
789 {
790 child = children->data;
791
792 if (child->widget == widget)
793 {
794 gtk_widget_unparent (widget);
795
796 /* security checks */
797 g_return_if_fail (GTK_IS_WIDGET (widget));
798
799 pizza->children = g_list_remove_link (pizza->children, children);
800 g_list_free (children);
801 g_free (child);
802
803 /* security checks */
804 g_return_if_fail (GTK_IS_WIDGET (widget));
805
806 GTK_PRIVATE_UNSET_FLAG (widget, GTK_IS_OFFSCREEN);
807
808 break;
809 }
810
811 children = children->next;
812 }
813}
814
815static void
816gtk_pizza_forall (GtkContainer *container,
817 gboolean include_internals,
818 GtkCallback callback,
819 gpointer callback_data)
820{
821 GtkPizza *pizza;
822 GtkPizzaChild *child;
823 GList *children;
824
825 g_return_if_fail (container != NULL);
826 g_return_if_fail (GTK_IS_PIZZA (container));
827 g_return_if_fail (callback != (GtkCallback)NULL);
828
829 pizza = GTK_PIZZA (container);
830
831 children = pizza->children;
832 while (children)
833 {
834 child = children->data;
835 children = children->next;
836
837 (* callback) (child->widget, callback_data);
838 }
839}
840
841static void
842gtk_pizza_allocate_child (GtkPizza *pizza,
843 GtkPizzaChild *child)
844{
845 GtkAllocation allocation;
846 GtkRequisition requisition;
847
848 allocation.x = child->x - pizza->xoffset;
849 allocation.y = child->y - pizza->yoffset;
850 gtk_widget_get_child_requisition (child->widget, &requisition);
851 allocation.width = requisition.width;
852 allocation.height = requisition.height;
853
854 gtk_widget_size_allocate (child->widget, &allocation);
855}
856
857static void
858gtk_pizza_adjust_allocations_recurse (GtkWidget *widget,
859 gpointer cb_data)
860{
861 GtkPizzaAdjData *data = cb_data;
862
863 widget->allocation.x += data->dx;
864 widget->allocation.y += data->dy;
865
866 if (GTK_WIDGET_NO_WINDOW (widget) && GTK_IS_CONTAINER (widget))
867 {
868 gtk_container_forall (GTK_CONTAINER (widget),
869 gtk_pizza_adjust_allocations_recurse,
870 cb_data);
871 }
872}
873
874static void
875gtk_pizza_adjust_allocations (GtkPizza *pizza,
876 gint dx,
877 gint dy)
878{
879 GList *tmp_list;
880 GtkPizzaAdjData data;
881
882 data.dx = dx;
883 data.dy = dy;
884
885 tmp_list = pizza->children;
886 while (tmp_list)
887 {
888 GtkPizzaChild *child = tmp_list->data;
889 tmp_list = tmp_list->next;
890
891 child->widget->allocation.x += dx;
892 child->widget->allocation.y += dy;
893
894 if (GTK_WIDGET_NO_WINDOW (child->widget) &&
895 GTK_IS_CONTAINER (child->widget))
896 {
897 gtk_container_forall (GTK_CONTAINER (child->widget),
898 gtk_pizza_adjust_allocations_recurse,
899 &data);
900 }
901 }
902}
903
904static void
905gtk_pizza_position_child (GtkPizza *pizza,
906 GtkPizzaChild *child)
907{
908 gint x;
909 gint y;
910
911 x = child->x - pizza->xoffset;
912 y = child->y - pizza->yoffset;
913
914 if (IS_ONSCREEN (x,y))
915 {
916 if (GTK_WIDGET_MAPPED (pizza) &&
917 GTK_WIDGET_VISIBLE (child->widget))
918 {
919 if (!GTK_WIDGET_MAPPED (child->widget))
920 gtk_widget_map (child->widget);
921 }
922
923 if (GTK_WIDGET_IS_OFFSCREEN (child->widget))
924 GTK_PRIVATE_UNSET_FLAG (child->widget, GTK_IS_OFFSCREEN);
925 }
926 else
927 {
928 if (!GTK_WIDGET_IS_OFFSCREEN (child->widget))
929 GTK_PRIVATE_SET_FLAG (child->widget, GTK_IS_OFFSCREEN);
930
931 if (GTK_WIDGET_MAPPED (child->widget))
932 gtk_widget_unmap (child->widget);
933 }
934}
935
936static void
937gtk_pizza_position_children (GtkPizza *pizza)
938{
939 GList *tmp_list;
940
941 tmp_list = pizza->children;
942 while (tmp_list)
943 {
944 GtkPizzaChild *child = tmp_list->data;
945 tmp_list = tmp_list->next;
946
947 gtk_pizza_position_child (pizza, child);
948 }
949}
950
951/* This function is used to find events to process while scrolling */
952static Bool
953gtk_pizza_expose_predicate (Display *display,
954 XEvent *xevent,
955 XPointer arg)
956{
957 if ((xevent->type == Expose) ||
958 ((xevent->xany.window == *(Window *)arg) &&
959 (xevent->type == ConfigureNotify)))
960 return True;
961 else
962 return False;
963}
964
965/* This is the main routine to do the scrolling. Scrolling is
966 * done by "Guffaw" scrolling, as in the Mozilla XFE, with
967 * a few modifications.
968 *
969 * The main improvement is that we keep track of whether we
970 * are obscured or not. If not, we ignore the generated expose
971 * events and instead do the exposes ourself, without having
972 * to wait for a roundtrip to the server. This also provides
973 * a limited form of expose-event compression, since we do
974 * the affected area as one big chunk.
975 */
976
977void
978gtk_pizza_scroll (GtkPizza *pizza, gint dx, gint dy)
979{
980 GtkWidget *widget;
981 XEvent xevent;
982 XID win;
983
984 gint x,y,w,h,border;
985
986 widget = GTK_WIDGET (pizza);
987
988 pizza->xoffset += dx;
989 pizza->yoffset += dy;
990
991 if (!GTK_WIDGET_MAPPED (pizza))
992 {
993 gtk_pizza_position_children (pizza);
994 return;
995 }
996
997 gtk_pizza_adjust_allocations (pizza, -dx, -dy);
998
999 if (pizza->shadow_type == GTK_MYSHADOW_NONE)
1000 border = 0;
1001 else
1002 if (pizza->shadow_type == GTK_MYSHADOW_THIN)
1003 border = 1;
1004 else
1005 border = 2;
1006
1007 x = 0;
1008 y = 0;
1009 w = widget->allocation.width - 2*border;
1010 h = widget->allocation.height - 2*border;
1011
1012 if (dx > 0)
1013 {
1014 if (gravity_works)
1015 {
1016 gdk_window_resize (pizza->bin_window,
1017 w + dx,
1018 h);
1019 gdk_window_move (pizza->bin_window, x-dx, y);
1020 gdk_window_move_resize (pizza->bin_window, x, y, w, h );
1021 }
1022 else
1023 {
1024 /* FIXME */
1025 }
1026 }
1027 else if (dx < 0)
1028 {
1029 if (gravity_works)
1030 {
1031 gdk_window_move_resize (pizza->bin_window,
1032 x + dx,
1033 y,
1034 w - dx,
1035 h);
1036 gdk_window_move (pizza->bin_window, x, y);
1037 gdk_window_resize (pizza->bin_window, w, h );
1038 }
1039 else
1040 {
1041 /* FIXME */
1042 }
1043 }
1044
1045 if (dy > 0)
1046 {
1047 if (gravity_works)
1048 {
1049 gdk_window_resize (pizza->bin_window, w, h + dy);
1050 gdk_window_move (pizza->bin_window, x, y-dy);
1051 gdk_window_move_resize (pizza->bin_window,
1052 x, y, w, h );
1053 }
1054 else
1055 {
1056 /* FIXME */
1057 }
1058 }
1059 else if (dy < 0)
1060 {
1061 if (gravity_works)
1062 {
1063 gdk_window_move_resize (pizza->bin_window,
1064 x, y+dy, w, h - dy );
1065 gdk_window_move (pizza->bin_window, x, y);
1066 gdk_window_resize (pizza->bin_window, w, h );
1067 }
1068 else
1069 {
1070 /* FIXME */
1071 }
1072 }
1073
1074 gtk_pizza_position_children (pizza);
1075
1076 gdk_flush();
1077
1078 win = GDK_WINDOW_XWINDOW (pizza->bin_window);
1079 while (XCheckIfEvent(GDK_WINDOW_XDISPLAY (pizza->bin_window),
1080 &xevent,
1081 gtk_pizza_expose_predicate,
1082 (XPointer)&win))
1083 {
1084 GdkEvent event;
1085 GtkWidget *event_widget;
1086
1087 if ((xevent.xany.window == GDK_WINDOW_XWINDOW (pizza->bin_window)) )
1088 gtk_pizza_filter (&xevent, &event, pizza);
1089
1090 if (xevent.type == Expose)
1091 {
1092 event.expose.window = gdk_window_lookup (xevent.xany.window);
1093 gdk_window_get_user_data (event.expose.window,
1094 (gpointer *)&event_widget);
1095
1096 if (event_widget)
1097 {
1098 event.expose.type = GDK_EXPOSE;
1099 event.expose.area.x = xevent.xexpose.x;
1100 event.expose.area.y = xevent.xexpose.y;
1101 event.expose.area.width = xevent.xexpose.width;
1102 event.expose.area.height = xevent.xexpose.height;
1103 event.expose.count = xevent.xexpose.count;
1104
1105 gdk_window_ref (event.expose.window);
1106 gtk_widget_event (event_widget, &event);
1107 gdk_window_unref (event.expose.window);
1108 }
1109 }
1110 }
1111}
1112
1113
1114/* The main event filter. Actually, we probably don't really need
1115 * to install this as a filter at all, since we are calling it
1116 * directly above in the expose-handling hack. But in case scrollbars
1117 * are fixed up in some manner...
1118 *
1119 * This routine identifies expose events that are generated when
1120 * we've temporarily moved the bin_window_origin, and translates
1121 * them or discards them, depending on whether we are obscured
1122 * or not.
1123 */
1124static GdkFilterReturn
1125gtk_pizza_filter (GdkXEvent *gdk_xevent,
1126 GdkEvent *event,
1127 gpointer data)
1128{
1129 XEvent *xevent;
1130 GtkPizza *pizza;
1131
1132 xevent = (XEvent *)gdk_xevent;
1133
1134 pizza = GTK_PIZZA (data);
1135
1136 if (!pizza->use_filter)
1137 return GDK_FILTER_CONTINUE;
1138
1139 switch (xevent->type)
1140 {
1141 case Expose:
1142 if (xevent->xexpose.serial == pizza->configure_serial)
1143 {
1144 xevent->xexpose.x += pizza->scroll_x;
1145 xevent->xexpose.y += pizza->scroll_y;
1146 }
1147 break;
1148
1149 case ConfigureNotify:
1150 {
1151 pizza->configure_serial = xevent->xconfigure.serial;
1152 pizza->scroll_x = xevent->xconfigure.x;
1153 pizza->scroll_y = xevent->xconfigure.y;
1154 }
1155 break;
1156 }
1157
1158 return GDK_FILTER_CONTINUE;
1159}
1160
1161/* Although GDK does have a GDK_VISIBILITY_NOTIFY event,
1162 * there is no corresponding event in GTK, so we have
1163 * to get the events from a filter
1164 */
1165static GdkFilterReturn
1166gtk_pizza_main_filter (GdkXEvent *gdk_xevent,
1167 GdkEvent *event,
1168 gpointer data)
1169{
1170 XEvent *xevent;
1171 GtkPizza *pizza;
1172
1173 xevent = (XEvent *)gdk_xevent;
1174 pizza = GTK_PIZZA (data);
1175
1176 if (!pizza->use_filter)
1177 return GDK_FILTER_CONTINUE;
1178
1179 if (xevent->type == VisibilityNotify)
1180 {
1181 switch (xevent->xvisibility.state)
1182 {
1183 case VisibilityFullyObscured:
1184 pizza->visibility = GDK_VISIBILITY_FULLY_OBSCURED;
1185 break;
1186
1187 case VisibilityPartiallyObscured:
1188 pizza->visibility = GDK_VISIBILITY_PARTIAL;
1189 break;
1190
1191 case VisibilityUnobscured:
1192 pizza->visibility = GDK_VISIBILITY_UNOBSCURED;
1193 break;
1194 }
1195
1196 return GDK_FILTER_REMOVE;
1197 }
1198
1199 return GDK_FILTER_CONTINUE;
1200}
1201
1202#ifdef __cplusplus
1203}
1204#endif /* __cplusplus */
wxWidgets (Impactor)