1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GTK+ Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
28 #include "gtkviewport.h"
29 #include "gtkextendedlayout.h"
31 #include "gtkmarshalers.h"
32 #include "gtkprivate.h"
43 static void gtk_viewport_finalize (GObject *object);
44 static void gtk_viewport_destroy (GtkObject *object);
45 static void gtk_viewport_set_property (GObject *object,
49 static void gtk_viewport_get_property (GObject *object,
53 static void gtk_viewport_set_scroll_adjustments (GtkViewport *viewport,
54 GtkAdjustment *hadjustment,
55 GtkAdjustment *vadjustment);
56 static void gtk_viewport_realize (GtkWidget *widget);
57 static void gtk_viewport_unrealize (GtkWidget *widget);
58 static void gtk_viewport_paint (GtkWidget *widget,
60 static gint gtk_viewport_expose (GtkWidget *widget,
61 GdkEventExpose *event);
62 static void gtk_viewport_add (GtkContainer *container,
64 static void gtk_viewport_size_allocate (GtkWidget *widget,
65 GtkAllocation *allocation);
66 static void gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment,
68 static void gtk_viewport_style_set (GtkWidget *widget,
69 GtkStyle *previous_style);
71 static void gtk_viewport_extended_layout_init (GtkExtendedLayoutIface *iface);
72 static void gtk_viewport_get_desired_width (GtkExtendedLayout *layout,
75 static void gtk_viewport_get_desired_height (GtkExtendedLayout *layout,
80 G_DEFINE_TYPE_WITH_CODE (GtkViewport, gtk_viewport, GTK_TYPE_BIN,
81 G_IMPLEMENT_INTERFACE (GTK_TYPE_EXTENDED_LAYOUT,
82 gtk_viewport_extended_layout_init))
85 gtk_viewport_class_init (GtkViewportClass *class)
87 GtkObjectClass *object_class;
88 GObjectClass *gobject_class;
89 GtkWidgetClass *widget_class;
90 GtkContainerClass *container_class;
92 object_class = (GtkObjectClass*) class;
93 gobject_class = G_OBJECT_CLASS (class);
94 widget_class = (GtkWidgetClass*) class;
95 container_class = (GtkContainerClass*) class;
97 gobject_class->finalize = gtk_viewport_finalize;
98 gobject_class->set_property = gtk_viewport_set_property;
99 gobject_class->get_property = gtk_viewport_get_property;
100 object_class->destroy = gtk_viewport_destroy;
102 widget_class->realize = gtk_viewport_realize;
103 widget_class->unrealize = gtk_viewport_unrealize;
104 widget_class->expose_event = gtk_viewport_expose;
105 widget_class->size_allocate = gtk_viewport_size_allocate;
106 widget_class->style_set = gtk_viewport_style_set;
108 container_class->add = gtk_viewport_add;
110 class->set_scroll_adjustments = gtk_viewport_set_scroll_adjustments;
112 g_object_class_install_property (gobject_class,
114 g_param_spec_object ("hadjustment",
115 P_("Horizontal adjustment"),
116 P_("The GtkAdjustment that determines the values of the horizontal position for this viewport"),
118 GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
120 g_object_class_install_property (gobject_class,
122 g_param_spec_object ("vadjustment",
123 P_("Vertical adjustment"),
124 P_("The GtkAdjustment that determines the values of the vertical position for this viewport"),
126 GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
128 g_object_class_install_property (gobject_class,
130 g_param_spec_enum ("shadow-type",
132 P_("Determines how the shadowed box around the viewport is drawn"),
133 GTK_TYPE_SHADOW_TYPE,
135 GTK_PARAM_READWRITE));
138 * GtkViewport::set-scroll-adjustments
139 * @horizontal: the horizontal #GtkAdjustment
140 * @vertical: the vertical #GtkAdjustment
142 * Set the scroll adjustments for the viewport. Usually scrolled containers
143 * like #GtkScrolledWindow will emit this signal to connect two instances
144 * of #GtkScrollbar to the scroll directions of the #GtkViewport.
146 widget_class->set_scroll_adjustments_signal =
147 g_signal_new (I_("set-scroll-adjustments"),
148 G_OBJECT_CLASS_TYPE (gobject_class),
149 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
150 G_STRUCT_OFFSET (GtkViewportClass, set_scroll_adjustments),
152 _gtk_marshal_VOID__OBJECT_OBJECT,
155 GTK_TYPE_ADJUSTMENT);
159 gtk_viewport_set_property (GObject *object,
164 GtkViewport *viewport;
166 viewport = GTK_VIEWPORT (object);
170 case PROP_HADJUSTMENT:
171 gtk_viewport_set_hadjustment (viewport, g_value_get_object (value));
173 case PROP_VADJUSTMENT:
174 gtk_viewport_set_vadjustment (viewport, g_value_get_object (value));
176 case PROP_SHADOW_TYPE:
177 gtk_viewport_set_shadow_type (viewport, g_value_get_enum (value));
180 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
186 gtk_viewport_get_property (GObject *object,
191 GtkViewport *viewport;
193 viewport = GTK_VIEWPORT (object);
197 case PROP_HADJUSTMENT:
198 g_value_set_object (value, viewport->hadjustment);
200 case PROP_VADJUSTMENT:
201 g_value_set_object (value, viewport->vadjustment);
203 case PROP_SHADOW_TYPE:
204 g_value_set_enum (value, viewport->shadow_type);
207 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
213 gtk_viewport_init (GtkViewport *viewport)
215 gtk_widget_set_has_window (GTK_WIDGET (viewport), TRUE);
217 gtk_widget_set_redraw_on_allocate (GTK_WIDGET (viewport), FALSE);
218 gtk_container_set_resize_mode (GTK_CONTAINER (viewport), GTK_RESIZE_QUEUE);
220 viewport->shadow_type = GTK_SHADOW_IN;
221 viewport->view_window = NULL;
222 viewport->bin_window = NULL;
223 viewport->hadjustment = NULL;
224 viewport->vadjustment = NULL;
229 * @hadjustment: horizontal adjustment.
230 * @vadjustment: vertical adjustment.
231 * @returns: a new #GtkViewport.
233 * Creates a new #GtkViewport with the given adjustments.
237 gtk_viewport_new (GtkAdjustment *hadjustment,
238 GtkAdjustment *vadjustment)
242 viewport = g_object_new (GTK_TYPE_VIEWPORT,
243 "hadjustment", hadjustment,
244 "vadjustment", vadjustment,
250 #define ADJUSTMENT_POINTER(viewport, orientation) \
251 (((orientation) == GTK_ORIENTATION_HORIZONTAL) ? \
252 &(viewport)->hadjustment : &(viewport)->vadjustment)
255 viewport_disconnect_adjustment (GtkViewport *viewport,
256 GtkOrientation orientation)
258 GtkAdjustment **adjustmentp = ADJUSTMENT_POINTER (viewport, orientation);
262 g_signal_handlers_disconnect_by_func (*adjustmentp,
263 gtk_viewport_adjustment_value_changed,
265 g_object_unref (*adjustmentp);
271 gtk_viewport_finalize (GObject *object)
273 GtkViewport *viewport = GTK_VIEWPORT (object);
275 viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL);
276 viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_VERTICAL);
278 G_OBJECT_CLASS (gtk_viewport_parent_class)->finalize (object);
282 gtk_viewport_destroy (GtkObject *object)
284 GtkViewport *viewport = GTK_VIEWPORT (object);
286 viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL);
287 viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_VERTICAL);
289 GTK_OBJECT_CLASS (gtk_viewport_parent_class)->destroy (object);
293 * gtk_viewport_get_hadjustment:
294 * @viewport: a #GtkViewport.
296 * Returns the horizontal adjustment of the viewport.
298 * Return value: the horizontal adjustment of @viewport.
301 gtk_viewport_get_hadjustment (GtkViewport *viewport)
303 g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
305 if (!viewport->hadjustment)
306 gtk_viewport_set_hadjustment (viewport, NULL);
308 return viewport->hadjustment;
312 * gtk_viewport_get_vadjustment:
313 * @viewport: a #GtkViewport.
315 * Returns the vertical adjustment of the viewport.
317 * Return value: the vertical adjustment of @viewport.
320 gtk_viewport_get_vadjustment (GtkViewport *viewport)
322 g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
324 if (!viewport->vadjustment)
325 gtk_viewport_set_vadjustment (viewport, NULL);
327 return viewport->vadjustment;
331 viewport_get_view_allocation (GtkViewport *viewport,
332 GtkAllocation *view_allocation)
334 GtkWidget *widget = GTK_WIDGET (viewport);
335 GtkAllocation *allocation = &widget->allocation;
336 gint border_width = GTK_CONTAINER (viewport)->border_width;
338 view_allocation->x = 0;
339 view_allocation->y = 0;
341 if (viewport->shadow_type != GTK_SHADOW_NONE)
343 view_allocation->x = widget->style->xthickness;
344 view_allocation->y = widget->style->ythickness;
347 view_allocation->width = MAX (1, allocation->width - view_allocation->x * 2 - border_width * 2);
348 view_allocation->height = MAX (1, allocation->height - view_allocation->y * 2 - border_width * 2);
352 viewport_reclamp_adjustment (GtkAdjustment *adjustment,
353 gboolean *value_changed)
355 gdouble value = adjustment->value;
357 value = CLAMP (value, 0, adjustment->upper - adjustment->page_size);
358 if (value != adjustment->value)
360 adjustment->value = value;
362 *value_changed = TRUE;
364 else if (value_changed)
365 *value_changed = FALSE;
369 viewport_set_hadjustment_values (GtkViewport *viewport,
370 gboolean *value_changed)
372 GtkBin *bin = GTK_BIN (viewport);
373 GtkAllocation view_allocation;
374 GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport);
375 gdouble old_page_size;
379 viewport_get_view_allocation (viewport, &view_allocation);
381 old_page_size = hadjustment->page_size;
382 old_upper = hadjustment->upper;
383 old_value = hadjustment->value;
384 hadjustment->page_size = view_allocation.width;
385 hadjustment->step_increment = view_allocation.width * 0.1;
386 hadjustment->page_increment = view_allocation.width * 0.9;
388 hadjustment->lower = 0;
390 if (bin->child && gtk_widget_get_visible (bin->child))
392 GtkRequisition child_requisition;
394 gtk_widget_get_child_requisition (bin->child, &child_requisition);
395 hadjustment->upper = MAX (child_requisition.width, view_allocation.width);
398 hadjustment->upper = view_allocation.width;
400 if (gtk_widget_get_direction (GTK_WIDGET (viewport)) == GTK_TEXT_DIR_RTL)
402 gdouble dist = old_upper - (old_value + old_page_size);
403 hadjustment->value = hadjustment->upper - dist - hadjustment->page_size;
404 viewport_reclamp_adjustment (hadjustment, value_changed);
405 *value_changed = (old_value != hadjustment->value);
408 viewport_reclamp_adjustment (hadjustment, value_changed);
412 viewport_set_vadjustment_values (GtkViewport *viewport,
413 gboolean *value_changed)
415 GtkBin *bin = GTK_BIN (viewport);
416 GtkAllocation view_allocation;
417 GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport);
419 viewport_get_view_allocation (viewport, &view_allocation);
421 vadjustment->page_size = view_allocation.height;
422 vadjustment->step_increment = view_allocation.height * 0.1;
423 vadjustment->page_increment = view_allocation.height * 0.9;
425 vadjustment->lower = 0;
427 if (bin->child && gtk_widget_get_visible (bin->child))
431 gtk_extended_layout_get_height_for_width (GTK_EXTENDED_LAYOUT (bin->child),
432 view_allocation.width,
435 vadjustment->upper = MAX (natural_height, view_allocation.height);
438 vadjustment->upper = view_allocation.height;
440 viewport_reclamp_adjustment (vadjustment, value_changed);
444 viewport_set_adjustment (GtkViewport *viewport,
445 GtkOrientation orientation,
446 GtkAdjustment *adjustment)
448 GtkAdjustment **adjustmentp = ADJUSTMENT_POINTER (viewport, orientation);
449 gboolean value_changed;
451 if (adjustment && adjustment == *adjustmentp)
455 adjustment = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0,
457 viewport_disconnect_adjustment (viewport, orientation);
458 *adjustmentp = adjustment;
459 g_object_ref_sink (adjustment);
461 if (orientation == GTK_ORIENTATION_HORIZONTAL)
462 viewport_set_hadjustment_values (viewport, &value_changed);
464 viewport_set_vadjustment_values (viewport, &value_changed);
466 g_signal_connect (adjustment, "value-changed",
467 G_CALLBACK (gtk_viewport_adjustment_value_changed),
470 gtk_adjustment_changed (adjustment);
473 gtk_adjustment_value_changed (adjustment);
475 gtk_viewport_adjustment_value_changed (adjustment, viewport);
479 * gtk_viewport_set_hadjustment:
480 * @viewport: a #GtkViewport.
481 * @adjustment: (allow-none): a #GtkAdjustment.
483 * Sets the horizontal adjustment of the viewport.
486 gtk_viewport_set_hadjustment (GtkViewport *viewport,
487 GtkAdjustment *adjustment)
489 g_return_if_fail (GTK_IS_VIEWPORT (viewport));
491 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
493 viewport_set_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL, adjustment);
495 g_object_notify (G_OBJECT (viewport), "hadjustment");
499 * gtk_viewport_set_vadjustment:
500 * @viewport: a #GtkViewport.
501 * @adjustment: (allow-none): a #GtkAdjustment.
503 * Sets the vertical adjustment of the viewport.
506 gtk_viewport_set_vadjustment (GtkViewport *viewport,
507 GtkAdjustment *adjustment)
509 g_return_if_fail (GTK_IS_VIEWPORT (viewport));
511 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
513 viewport_set_adjustment (viewport, GTK_ORIENTATION_VERTICAL, adjustment);
515 g_object_notify (G_OBJECT (viewport), "vadjustment");
519 gtk_viewport_set_scroll_adjustments (GtkViewport *viewport,
520 GtkAdjustment *hadjustment,
521 GtkAdjustment *vadjustment)
523 gtk_viewport_set_hadjustment (viewport, hadjustment);
524 gtk_viewport_set_vadjustment (viewport, vadjustment);
528 * gtk_viewport_set_shadow_type:
529 * @viewport: a #GtkViewport.
530 * @type: the new shadow type.
532 * Sets the shadow type of the viewport.
535 gtk_viewport_set_shadow_type (GtkViewport *viewport,
538 g_return_if_fail (GTK_IS_VIEWPORT (viewport));
540 if ((GtkShadowType) viewport->shadow_type != type)
542 viewport->shadow_type = type;
544 if (gtk_widget_get_visible (GTK_WIDGET (viewport)))
546 gtk_widget_size_allocate (GTK_WIDGET (viewport), &(GTK_WIDGET (viewport)->allocation));
547 gtk_widget_queue_draw (GTK_WIDGET (viewport));
550 g_object_notify (G_OBJECT (viewport), "shadow-type");
555 * gtk_viewport_get_shadow_type:
556 * @viewport: a #GtkViewport
558 * Gets the shadow type of the #GtkViewport. See
559 * gtk_viewport_set_shadow_type().
561 * Return value: the shadow type
564 gtk_viewport_get_shadow_type (GtkViewport *viewport)
566 g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), GTK_SHADOW_NONE);
568 return viewport->shadow_type;
572 * gtk_viewport_get_bin_window:
573 * @viewport: a #GtkViewport
575 * Gets the bin window of the #GtkViewport.
577 * Return value: a #GdkWindow
582 gtk_viewport_get_bin_window (GtkViewport *viewport)
584 g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
586 return viewport->bin_window;
590 gtk_viewport_realize (GtkWidget *widget)
592 GtkViewport *viewport = GTK_VIEWPORT (widget);
593 GtkBin *bin = GTK_BIN (widget);
594 GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport);
595 GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport);
596 gint border_width = GTK_CONTAINER (widget)->border_width;
598 GtkAllocation view_allocation;
599 GdkWindowAttr attributes;
600 gint attributes_mask;
603 gtk_widget_set_realized (widget, TRUE);
605 attributes.x = widget->allocation.x + border_width;
606 attributes.y = widget->allocation.y + border_width;
607 attributes.width = widget->allocation.width - border_width * 2;
608 attributes.height = widget->allocation.height - border_width * 2;
609 attributes.window_type = GDK_WINDOW_CHILD;
610 attributes.wclass = GDK_INPUT_OUTPUT;
611 attributes.visual = gtk_widget_get_visual (widget);
612 attributes.colormap = gtk_widget_get_colormap (widget);
614 event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
615 /* We select on button_press_mask so that button 4-5 scrolls are trapped.
617 attributes.event_mask = event_mask | GDK_BUTTON_PRESS_MASK;
619 attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
621 widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
622 &attributes, attributes_mask);
623 gdk_window_set_user_data (widget->window, viewport);
625 viewport_get_view_allocation (viewport, &view_allocation);
627 attributes.x = view_allocation.x;
628 attributes.y = view_allocation.y;
629 attributes.width = view_allocation.width;
630 attributes.height = view_allocation.height;
631 attributes.event_mask = 0;
633 viewport->view_window = gdk_window_new (widget->window, &attributes, attributes_mask);
634 gdk_window_set_user_data (viewport->view_window, viewport);
636 gdk_window_set_back_pixmap (viewport->view_window, NULL, FALSE);
638 attributes.x = - hadjustment->value;
639 attributes.y = - vadjustment->value;
640 attributes.width = hadjustment->upper;
641 attributes.height = vadjustment->upper;
643 attributes.event_mask = event_mask;
645 viewport->bin_window = gdk_window_new (viewport->view_window, &attributes, attributes_mask);
646 gdk_window_set_user_data (viewport->bin_window, viewport);
649 gtk_widget_set_parent_window (bin->child, viewport->bin_window);
651 widget->style = gtk_style_attach (widget->style, widget->window);
652 gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
653 gtk_style_set_background (widget->style, viewport->bin_window, GTK_STATE_NORMAL);
655 /* Call paint here to allow a theme to set the background without flashing
657 gtk_paint_flat_box(widget->style, viewport->bin_window, GTK_STATE_NORMAL,
659 NULL, widget, "viewportbin",
662 gdk_window_show (viewport->bin_window);
663 gdk_window_show (viewport->view_window);
667 gtk_viewport_unrealize (GtkWidget *widget)
669 GtkViewport *viewport = GTK_VIEWPORT (widget);
671 gdk_window_set_user_data (viewport->view_window, NULL);
672 gdk_window_destroy (viewport->view_window);
673 viewport->view_window = NULL;
675 gdk_window_set_user_data (viewport->bin_window, NULL);
676 gdk_window_destroy (viewport->bin_window);
677 viewport->bin_window = NULL;
679 GTK_WIDGET_CLASS (gtk_viewport_parent_class)->unrealize (widget);
683 gtk_viewport_paint (GtkWidget *widget,
686 if (gtk_widget_is_drawable (widget))
688 GtkViewport *viewport = GTK_VIEWPORT (widget);
690 gtk_paint_shadow (widget->style, widget->window,
691 GTK_STATE_NORMAL, viewport->shadow_type,
692 area, widget, "viewport",
698 gtk_viewport_expose (GtkWidget *widget,
699 GdkEventExpose *event)
701 GtkViewport *viewport;
703 if (gtk_widget_is_drawable (widget))
705 viewport = GTK_VIEWPORT (widget);
707 if (event->window == widget->window)
708 gtk_viewport_paint (widget, &event->area);
709 else if (event->window == viewport->bin_window)
711 gtk_paint_flat_box(widget->style, viewport->bin_window,
712 GTK_STATE_NORMAL, GTK_SHADOW_NONE,
713 &event->area, widget, "viewportbin",
716 GTK_WIDGET_CLASS (gtk_viewport_parent_class)->expose_event (widget, event);
724 gtk_viewport_add (GtkContainer *container,
727 GtkBin *bin = GTK_BIN (container);
729 g_return_if_fail (bin->child == NULL);
731 gtk_widget_set_parent_window (child, GTK_VIEWPORT (bin)->bin_window);
733 GTK_CONTAINER_CLASS (gtk_viewport_parent_class)->add (container, child);
737 gtk_viewport_size_allocate (GtkWidget *widget,
738 GtkAllocation *allocation)
740 GtkViewport *viewport = GTK_VIEWPORT (widget);
741 GtkBin *bin = GTK_BIN (widget);
742 gint border_width = GTK_CONTAINER (widget)->border_width;
743 gboolean hadjustment_value_changed, vadjustment_value_changed;
744 GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport);
745 GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport);
746 GtkAllocation child_allocation;
748 /* If our size changed, and we have a shadow, queue a redraw on widget->window to
749 * redraw the shadow correctly.
751 if (gtk_widget_get_mapped (widget) &&
752 viewport->shadow_type != GTK_SHADOW_NONE &&
753 (widget->allocation.width != allocation->width ||
754 widget->allocation.height != allocation->height))
755 gdk_window_invalidate_rect (widget->window, NULL, FALSE);
757 widget->allocation = *allocation;
759 viewport_set_hadjustment_values (viewport, &hadjustment_value_changed);
760 viewport_set_vadjustment_values (viewport, &vadjustment_value_changed);
762 child_allocation.x = 0;
763 child_allocation.y = 0;
764 child_allocation.width = hadjustment->upper;
765 child_allocation.height = vadjustment->upper;
766 if (gtk_widget_get_realized (widget))
768 GtkAllocation view_allocation;
769 gdk_window_move_resize (widget->window,
770 allocation->x + border_width,
771 allocation->y + border_width,
772 allocation->width - border_width * 2,
773 allocation->height - border_width * 2);
775 viewport_get_view_allocation (viewport, &view_allocation);
776 gdk_window_move_resize (viewport->view_window,
779 view_allocation.width,
780 view_allocation.height);
781 gdk_window_move_resize (viewport->bin_window,
782 - hadjustment->value,
783 - vadjustment->value,
784 child_allocation.width,
785 child_allocation.height);
787 if (bin->child && gtk_widget_get_visible (bin->child))
788 gtk_widget_size_allocate (bin->child, &child_allocation);
790 gtk_adjustment_changed (hadjustment);
791 gtk_adjustment_changed (vadjustment);
792 if (hadjustment_value_changed)
793 gtk_adjustment_value_changed (hadjustment);
794 if (vadjustment_value_changed)
795 gtk_adjustment_value_changed (vadjustment);
799 gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment,
802 GtkViewport *viewport = GTK_VIEWPORT (data);
803 GtkBin *bin = GTK_BIN (data);
805 if (bin->child && gtk_widget_get_visible (bin->child) &&
806 gtk_widget_get_realized (GTK_WIDGET (viewport)))
808 GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport);
809 GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport);
813 gdk_window_get_position (viewport->bin_window, &old_x, &old_y);
814 new_x = - hadjustment->value;
815 new_y = - vadjustment->value;
817 if (new_x != old_x || new_y != old_y)
819 gdk_window_move (viewport->bin_window, new_x, new_y);
820 gdk_window_process_updates (viewport->bin_window, TRUE);
826 gtk_viewport_style_set (GtkWidget *widget,
827 GtkStyle *previous_style)
829 if (gtk_widget_get_realized (widget) &&
830 gtk_widget_get_has_window (widget))
832 GtkViewport *viewport = GTK_VIEWPORT (widget);
834 gtk_style_set_background (widget->style, viewport->bin_window, GTK_STATE_NORMAL);
835 gtk_style_set_background (widget->style, widget->window, widget->state);
841 gtk_viewport_extended_layout_init (GtkExtendedLayoutIface *iface)
843 iface->get_desired_width = gtk_viewport_get_desired_width;
844 iface->get_desired_height = gtk_viewport_get_desired_height;
848 gtk_viewport_get_desired_size (GtkExtendedLayout *layout,
849 GtkOrientation orientation,
854 gint child_min, child_nat;
855 gint minimum, natural;
857 child = gtk_bin_get_child (GTK_BIN (layout));
859 /* XXX This should probably be (border_width * 2); but GTK+ has
860 * been doing this with a single border for a while now...
862 minimum = GTK_CONTAINER (layout)->border_width;
864 if (GTK_VIEWPORT (layout)->shadow_type != GTK_SHADOW_NONE)
866 if (orientation == GTK_ORIENTATION_HORIZONTAL)
867 minimum += 2 * GTK_WIDGET (layout)->style->xthickness;
869 minimum += 2 * GTK_WIDGET (layout)->style->ythickness;
874 if (child && gtk_widget_get_visible (child))
876 if (orientation == GTK_ORIENTATION_HORIZONTAL)
877 gtk_extended_layout_get_desired_width (GTK_EXTENDED_LAYOUT (child), &child_min, &child_nat);
879 gtk_extended_layout_get_desired_height (GTK_EXTENDED_LAYOUT (child), &child_min, &child_nat);
881 minimum += child_min;
882 natural += child_nat;
887 gtk_viewport_get_desired_width (GtkExtendedLayout *layout,
891 gtk_viewport_get_desired_size (layout, GTK_ORIENTATION_HORIZONTAL, minimum_size, natural_size);
895 gtk_viewport_get_desired_height (GtkExtendedLayout *layout,
899 gtk_viewport_get_desired_size (layout, GTK_ORIENTATION_VERTICAL, minimum_size, natural_size);
902 #define __GTK_VIEWPORT_C__
903 #include "gtkaliasdef.c"