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 "gtksizerequest.h"
31 #include "gtkmarshalers.h"
32 #include "gtkprivate.h"
37 * @Short_description: An adapter which makes widgets scrollable
39 * @See_also:#GtkScrolledWindow, #GtkAdjustment
41 * The #GtkViewport widget acts as an adaptor class, implementing
42 * scrollability for child widgets that lack their own scrolling
43 * capabilities. Use #GtkViewport to scroll child widgets such as
44 * #GtkTable, #GtkBox, and so on.
46 * If a widget has native scrolling abilities, such as #GtkTextView,
47 * #GtkTreeView or #GtkIconview, it can be added to a #GtkScrolledWindow
48 * with gtk_container_add(). If a widget does not, you must first add the
49 * widget to a #GtkViewport, then add the viewport to the scrolled window.
50 * The convenience function gtk_scrolled_window_add_with_viewport() does
51 * exactly this, so you can ignore the presence of the viewport.
62 static void gtk_viewport_finalize (GObject *object);
63 static void gtk_viewport_destroy (GtkObject *object);
64 static void gtk_viewport_set_property (GObject *object,
68 static void gtk_viewport_get_property (GObject *object,
72 static void gtk_viewport_set_scroll_adjustments (GtkViewport *viewport,
73 GtkAdjustment *hadjustment,
74 GtkAdjustment *vadjustment);
75 static void gtk_viewport_realize (GtkWidget *widget);
76 static void gtk_viewport_unrealize (GtkWidget *widget);
77 static void gtk_viewport_paint (GtkWidget *widget,
79 static gint gtk_viewport_expose (GtkWidget *widget,
80 GdkEventExpose *event);
81 static void gtk_viewport_add (GtkContainer *container,
83 static void gtk_viewport_size_allocate (GtkWidget *widget,
84 GtkAllocation *allocation);
85 static void gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment,
87 static void gtk_viewport_style_set (GtkWidget *widget,
88 GtkStyle *previous_style);
90 static void gtk_viewport_size_request_init (GtkSizeRequestIface *iface);
91 static void gtk_viewport_get_width (GtkSizeRequest *widget,
94 static void gtk_viewport_get_height (GtkSizeRequest *widget,
99 G_DEFINE_TYPE_WITH_CODE (GtkViewport, gtk_viewport, GTK_TYPE_BIN,
100 G_IMPLEMENT_INTERFACE (GTK_TYPE_SIZE_REQUEST,
101 gtk_viewport_size_request_init))
104 gtk_viewport_class_init (GtkViewportClass *class)
106 GtkObjectClass *object_class;
107 GObjectClass *gobject_class;
108 GtkWidgetClass *widget_class;
109 GtkContainerClass *container_class;
111 object_class = (GtkObjectClass*) class;
112 gobject_class = G_OBJECT_CLASS (class);
113 widget_class = (GtkWidgetClass*) class;
114 container_class = (GtkContainerClass*) class;
116 gobject_class->finalize = gtk_viewport_finalize;
117 gobject_class->set_property = gtk_viewport_set_property;
118 gobject_class->get_property = gtk_viewport_get_property;
119 object_class->destroy = gtk_viewport_destroy;
121 widget_class->realize = gtk_viewport_realize;
122 widget_class->unrealize = gtk_viewport_unrealize;
123 widget_class->expose_event = gtk_viewport_expose;
124 widget_class->size_allocate = gtk_viewport_size_allocate;
125 widget_class->style_set = gtk_viewport_style_set;
127 container_class->add = gtk_viewport_add;
129 class->set_scroll_adjustments = gtk_viewport_set_scroll_adjustments;
131 g_object_class_install_property (gobject_class,
133 g_param_spec_object ("hadjustment",
134 P_("Horizontal adjustment"),
135 P_("The GtkAdjustment that determines the values of the horizontal position for this viewport"),
137 GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
139 g_object_class_install_property (gobject_class,
141 g_param_spec_object ("vadjustment",
142 P_("Vertical adjustment"),
143 P_("The GtkAdjustment that determines the values of the vertical position for this viewport"),
145 GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
147 g_object_class_install_property (gobject_class,
149 g_param_spec_enum ("shadow-type",
151 P_("Determines how the shadowed box around the viewport is drawn"),
152 GTK_TYPE_SHADOW_TYPE,
154 GTK_PARAM_READWRITE));
157 * GtkViewport::set-scroll-adjustments
158 * @horizontal: the horizontal #GtkAdjustment
159 * @vertical: the vertical #GtkAdjustment
161 * Set the scroll adjustments for the viewport. Usually scrolled containers
162 * like #GtkScrolledWindow will emit this signal to connect two instances
163 * of #GtkScrollbar to the scroll directions of the #GtkViewport.
165 widget_class->set_scroll_adjustments_signal =
166 g_signal_new (I_("set-scroll-adjustments"),
167 G_OBJECT_CLASS_TYPE (gobject_class),
168 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
169 G_STRUCT_OFFSET (GtkViewportClass, set_scroll_adjustments),
171 _gtk_marshal_VOID__OBJECT_OBJECT,
174 GTK_TYPE_ADJUSTMENT);
178 gtk_viewport_set_property (GObject *object,
183 GtkViewport *viewport;
185 viewport = GTK_VIEWPORT (object);
189 case PROP_HADJUSTMENT:
190 gtk_viewport_set_hadjustment (viewport, g_value_get_object (value));
192 case PROP_VADJUSTMENT:
193 gtk_viewport_set_vadjustment (viewport, g_value_get_object (value));
195 case PROP_SHADOW_TYPE:
196 gtk_viewport_set_shadow_type (viewport, g_value_get_enum (value));
199 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
205 gtk_viewport_get_property (GObject *object,
210 GtkViewport *viewport;
212 viewport = GTK_VIEWPORT (object);
216 case PROP_HADJUSTMENT:
217 g_value_set_object (value, viewport->hadjustment);
219 case PROP_VADJUSTMENT:
220 g_value_set_object (value, viewport->vadjustment);
222 case PROP_SHADOW_TYPE:
223 g_value_set_enum (value, viewport->shadow_type);
226 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
232 gtk_viewport_init (GtkViewport *viewport)
234 gtk_widget_set_has_window (GTK_WIDGET (viewport), TRUE);
236 gtk_widget_set_redraw_on_allocate (GTK_WIDGET (viewport), FALSE);
237 gtk_container_set_resize_mode (GTK_CONTAINER (viewport), GTK_RESIZE_QUEUE);
239 viewport->shadow_type = GTK_SHADOW_IN;
240 viewport->view_window = NULL;
241 viewport->bin_window = NULL;
242 viewport->hadjustment = NULL;
243 viewport->vadjustment = NULL;
248 * @hadjustment: horizontal adjustment.
249 * @vadjustment: vertical adjustment.
250 * @returns: a new #GtkViewport.
252 * Creates a new #GtkViewport with the given adjustments.
256 gtk_viewport_new (GtkAdjustment *hadjustment,
257 GtkAdjustment *vadjustment)
261 viewport = g_object_new (GTK_TYPE_VIEWPORT,
262 "hadjustment", hadjustment,
263 "vadjustment", vadjustment,
269 #define ADJUSTMENT_POINTER(viewport, orientation) \
270 (((orientation) == GTK_ORIENTATION_HORIZONTAL) ? \
271 &(viewport)->hadjustment : &(viewport)->vadjustment)
274 viewport_disconnect_adjustment (GtkViewport *viewport,
275 GtkOrientation orientation)
277 GtkAdjustment **adjustmentp = ADJUSTMENT_POINTER (viewport, orientation);
281 g_signal_handlers_disconnect_by_func (*adjustmentp,
282 gtk_viewport_adjustment_value_changed,
284 g_object_unref (*adjustmentp);
290 gtk_viewport_finalize (GObject *object)
292 GtkViewport *viewport = GTK_VIEWPORT (object);
294 viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL);
295 viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_VERTICAL);
297 G_OBJECT_CLASS (gtk_viewport_parent_class)->finalize (object);
301 gtk_viewport_destroy (GtkObject *object)
303 GtkViewport *viewport = GTK_VIEWPORT (object);
305 viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL);
306 viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_VERTICAL);
308 GTK_OBJECT_CLASS (gtk_viewport_parent_class)->destroy (object);
312 * gtk_viewport_get_hadjustment:
313 * @viewport: a #GtkViewport.
315 * Returns the horizontal adjustment of the viewport.
317 * Return value: the horizontal adjustment of @viewport.
320 gtk_viewport_get_hadjustment (GtkViewport *viewport)
322 g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
324 if (!viewport->hadjustment)
325 gtk_viewport_set_hadjustment (viewport, NULL);
327 return viewport->hadjustment;
331 * gtk_viewport_get_vadjustment:
332 * @viewport: a #GtkViewport.
334 * Returns the vertical adjustment of the viewport.
336 * Return value: the vertical adjustment of @viewport.
339 gtk_viewport_get_vadjustment (GtkViewport *viewport)
341 g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
343 if (!viewport->vadjustment)
344 gtk_viewport_set_vadjustment (viewport, NULL);
346 return viewport->vadjustment;
350 viewport_get_view_allocation (GtkViewport *viewport,
351 GtkAllocation *view_allocation)
353 GtkWidget *widget = GTK_WIDGET (viewport);
354 GtkAllocation *allocation = &widget->allocation;
355 gint border_width = GTK_CONTAINER (viewport)->border_width;
357 view_allocation->x = 0;
358 view_allocation->y = 0;
360 if (viewport->shadow_type != GTK_SHADOW_NONE)
362 view_allocation->x = widget->style->xthickness;
363 view_allocation->y = widget->style->ythickness;
366 view_allocation->width = MAX (1, allocation->width - view_allocation->x * 2 - border_width * 2);
367 view_allocation->height = MAX (1, allocation->height - view_allocation->y * 2 - border_width * 2);
371 viewport_reclamp_adjustment (GtkAdjustment *adjustment,
372 gboolean *value_changed)
374 gdouble value = adjustment->value;
376 value = CLAMP (value, 0, adjustment->upper - adjustment->page_size);
377 if (value != adjustment->value)
379 adjustment->value = value;
381 *value_changed = TRUE;
383 else if (value_changed)
384 *value_changed = FALSE;
388 viewport_set_hadjustment_values (GtkViewport *viewport,
389 gboolean *value_changed)
391 GtkBin *bin = GTK_BIN (viewport);
392 GtkAllocation view_allocation;
393 GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport);
394 gdouble old_page_size;
398 viewport_get_view_allocation (viewport, &view_allocation);
400 old_page_size = hadjustment->page_size;
401 old_upper = hadjustment->upper;
402 old_value = hadjustment->value;
403 hadjustment->page_size = view_allocation.width;
404 hadjustment->step_increment = view_allocation.width * 0.1;
405 hadjustment->page_increment = view_allocation.width * 0.9;
407 hadjustment->lower = 0;
409 if (bin->child && gtk_widget_get_visible (bin->child))
411 GtkRequisition child_requisition;
413 gtk_widget_get_child_requisition (bin->child, &child_requisition);
414 hadjustment->upper = MAX (child_requisition.width, view_allocation.width);
417 hadjustment->upper = view_allocation.width;
419 if (gtk_widget_get_direction (GTK_WIDGET (viewport)) == GTK_TEXT_DIR_RTL)
421 gdouble dist = old_upper - (old_value + old_page_size);
422 hadjustment->value = hadjustment->upper - dist - hadjustment->page_size;
423 viewport_reclamp_adjustment (hadjustment, value_changed);
424 *value_changed = (old_value != hadjustment->value);
427 viewport_reclamp_adjustment (hadjustment, value_changed);
431 viewport_set_vadjustment_values (GtkViewport *viewport,
432 gboolean *value_changed)
434 GtkBin *bin = GTK_BIN (viewport);
435 GtkAllocation view_allocation;
436 GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport);
438 viewport_get_view_allocation (viewport, &view_allocation);
440 vadjustment->page_size = view_allocation.height;
441 vadjustment->step_increment = view_allocation.height * 0.1;
442 vadjustment->page_increment = view_allocation.height * 0.9;
444 vadjustment->lower = 0;
446 if (bin->child && gtk_widget_get_visible (bin->child))
450 gtk_size_request_get_height_for_width (GTK_SIZE_REQUEST (bin->child),
451 view_allocation.width,
454 vadjustment->upper = MAX (natural_height, view_allocation.height);
457 vadjustment->upper = view_allocation.height;
459 viewport_reclamp_adjustment (vadjustment, value_changed);
463 viewport_set_adjustment (GtkViewport *viewport,
464 GtkOrientation orientation,
465 GtkAdjustment *adjustment)
467 GtkAdjustment **adjustmentp = ADJUSTMENT_POINTER (viewport, orientation);
468 gboolean value_changed;
470 if (adjustment && adjustment == *adjustmentp)
474 adjustment = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0,
476 viewport_disconnect_adjustment (viewport, orientation);
477 *adjustmentp = adjustment;
478 g_object_ref_sink (adjustment);
480 if (orientation == GTK_ORIENTATION_HORIZONTAL)
481 viewport_set_hadjustment_values (viewport, &value_changed);
483 viewport_set_vadjustment_values (viewport, &value_changed);
485 g_signal_connect (adjustment, "value-changed",
486 G_CALLBACK (gtk_viewport_adjustment_value_changed),
489 gtk_adjustment_changed (adjustment);
492 gtk_adjustment_value_changed (adjustment);
494 gtk_viewport_adjustment_value_changed (adjustment, viewport);
498 * gtk_viewport_set_hadjustment:
499 * @viewport: a #GtkViewport.
500 * @adjustment: (allow-none): a #GtkAdjustment.
502 * Sets the horizontal adjustment of the viewport.
505 gtk_viewport_set_hadjustment (GtkViewport *viewport,
506 GtkAdjustment *adjustment)
508 g_return_if_fail (GTK_IS_VIEWPORT (viewport));
510 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
512 viewport_set_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL, adjustment);
514 g_object_notify (G_OBJECT (viewport), "hadjustment");
518 * gtk_viewport_set_vadjustment:
519 * @viewport: a #GtkViewport.
520 * @adjustment: (allow-none): a #GtkAdjustment.
522 * Sets the vertical adjustment of the viewport.
525 gtk_viewport_set_vadjustment (GtkViewport *viewport,
526 GtkAdjustment *adjustment)
528 g_return_if_fail (GTK_IS_VIEWPORT (viewport));
530 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
532 viewport_set_adjustment (viewport, GTK_ORIENTATION_VERTICAL, adjustment);
534 g_object_notify (G_OBJECT (viewport), "vadjustment");
538 gtk_viewport_set_scroll_adjustments (GtkViewport *viewport,
539 GtkAdjustment *hadjustment,
540 GtkAdjustment *vadjustment)
542 gtk_viewport_set_hadjustment (viewport, hadjustment);
543 gtk_viewport_set_vadjustment (viewport, vadjustment);
547 * gtk_viewport_set_shadow_type:
548 * @viewport: a #GtkViewport.
549 * @type: the new shadow type.
551 * Sets the shadow type of the viewport.
554 gtk_viewport_set_shadow_type (GtkViewport *viewport,
557 g_return_if_fail (GTK_IS_VIEWPORT (viewport));
559 if ((GtkShadowType) viewport->shadow_type != type)
561 viewport->shadow_type = type;
563 if (gtk_widget_get_visible (GTK_WIDGET (viewport)))
565 gtk_widget_size_allocate (GTK_WIDGET (viewport), &(GTK_WIDGET (viewport)->allocation));
566 gtk_widget_queue_draw (GTK_WIDGET (viewport));
569 g_object_notify (G_OBJECT (viewport), "shadow-type");
574 * gtk_viewport_get_shadow_type:
575 * @viewport: a #GtkViewport
577 * Gets the shadow type of the #GtkViewport. See
578 * gtk_viewport_set_shadow_type().
580 * Return value: the shadow type
583 gtk_viewport_get_shadow_type (GtkViewport *viewport)
585 g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), GTK_SHADOW_NONE);
587 return viewport->shadow_type;
591 * gtk_viewport_get_bin_window:
592 * @viewport: a #GtkViewport
594 * Gets the bin window of the #GtkViewport.
596 * Return value: a #GdkWindow
601 gtk_viewport_get_bin_window (GtkViewport *viewport)
603 g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
605 return viewport->bin_window;
609 * gtk_viewport_get_view_window:
610 * @viewport: a #GtkViewport
612 * Gets the view window of the #GtkViewport.
614 * Return value: (transfer none): a #GdkWindow
619 gtk_viewport_get_view_window (GtkViewport *viewport)
621 g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
623 return viewport->view_window;
627 gtk_viewport_realize (GtkWidget *widget)
629 GtkViewport *viewport = GTK_VIEWPORT (widget);
630 GtkBin *bin = GTK_BIN (widget);
631 GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport);
632 GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport);
633 gint border_width = GTK_CONTAINER (widget)->border_width;
635 GtkAllocation view_allocation;
636 GdkWindowAttr attributes;
637 gint attributes_mask;
640 gtk_widget_set_realized (widget, TRUE);
642 attributes.x = widget->allocation.x + border_width;
643 attributes.y = widget->allocation.y + border_width;
644 attributes.width = widget->allocation.width - border_width * 2;
645 attributes.height = widget->allocation.height - border_width * 2;
646 attributes.window_type = GDK_WINDOW_CHILD;
647 attributes.wclass = GDK_INPUT_OUTPUT;
648 attributes.visual = gtk_widget_get_visual (widget);
649 attributes.colormap = gtk_widget_get_colormap (widget);
651 event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
652 /* We select on button_press_mask so that button 4-5 scrolls are trapped.
654 attributes.event_mask = event_mask | GDK_BUTTON_PRESS_MASK;
656 attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
658 widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
659 &attributes, attributes_mask);
660 gdk_window_set_user_data (widget->window, viewport);
662 viewport_get_view_allocation (viewport, &view_allocation);
664 attributes.x = view_allocation.x;
665 attributes.y = view_allocation.y;
666 attributes.width = view_allocation.width;
667 attributes.height = view_allocation.height;
668 attributes.event_mask = 0;
670 viewport->view_window = gdk_window_new (widget->window, &attributes, attributes_mask);
671 gdk_window_set_user_data (viewport->view_window, viewport);
673 gdk_window_set_back_pixmap (viewport->view_window, NULL, FALSE);
675 attributes.x = - hadjustment->value;
676 attributes.y = - vadjustment->value;
677 attributes.width = hadjustment->upper;
678 attributes.height = vadjustment->upper;
680 attributes.event_mask = event_mask;
682 viewport->bin_window = gdk_window_new (viewport->view_window, &attributes, attributes_mask);
683 gdk_window_set_user_data (viewport->bin_window, viewport);
686 gtk_widget_set_parent_window (bin->child, viewport->bin_window);
688 widget->style = gtk_style_attach (widget->style, widget->window);
689 gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
690 gtk_style_set_background (widget->style, viewport->bin_window, GTK_STATE_NORMAL);
692 /* Call paint here to allow a theme to set the background without flashing
694 gtk_paint_flat_box(widget->style, viewport->bin_window, GTK_STATE_NORMAL,
696 NULL, widget, "viewportbin",
699 gdk_window_show (viewport->bin_window);
700 gdk_window_show (viewport->view_window);
704 gtk_viewport_unrealize (GtkWidget *widget)
706 GtkViewport *viewport = GTK_VIEWPORT (widget);
708 gdk_window_set_user_data (viewport->view_window, NULL);
709 gdk_window_destroy (viewport->view_window);
710 viewport->view_window = NULL;
712 gdk_window_set_user_data (viewport->bin_window, NULL);
713 gdk_window_destroy (viewport->bin_window);
714 viewport->bin_window = NULL;
716 GTK_WIDGET_CLASS (gtk_viewport_parent_class)->unrealize (widget);
720 gtk_viewport_paint (GtkWidget *widget,
723 if (gtk_widget_is_drawable (widget))
725 GtkViewport *viewport = GTK_VIEWPORT (widget);
727 gtk_paint_shadow (widget->style, widget->window,
728 GTK_STATE_NORMAL, viewport->shadow_type,
729 area, widget, "viewport",
735 gtk_viewport_expose (GtkWidget *widget,
736 GdkEventExpose *event)
738 GtkViewport *viewport;
740 if (gtk_widget_is_drawable (widget))
742 viewport = GTK_VIEWPORT (widget);
744 if (event->window == widget->window)
745 gtk_viewport_paint (widget, &event->area);
746 else if (event->window == viewport->bin_window)
748 gtk_paint_flat_box(widget->style, viewport->bin_window,
749 GTK_STATE_NORMAL, GTK_SHADOW_NONE,
750 &event->area, widget, "viewportbin",
753 GTK_WIDGET_CLASS (gtk_viewport_parent_class)->expose_event (widget, event);
761 gtk_viewport_add (GtkContainer *container,
764 GtkBin *bin = GTK_BIN (container);
766 g_return_if_fail (bin->child == NULL);
768 gtk_widget_set_parent_window (child, GTK_VIEWPORT (bin)->bin_window);
770 GTK_CONTAINER_CLASS (gtk_viewport_parent_class)->add (container, child);
774 gtk_viewport_size_allocate (GtkWidget *widget,
775 GtkAllocation *allocation)
777 GtkViewport *viewport = GTK_VIEWPORT (widget);
778 GtkBin *bin = GTK_BIN (widget);
779 gint border_width = GTK_CONTAINER (widget)->border_width;
780 gboolean hadjustment_value_changed, vadjustment_value_changed;
781 GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport);
782 GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport);
783 GtkAllocation child_allocation;
785 /* If our size changed, and we have a shadow, queue a redraw on widget->window to
786 * redraw the shadow correctly.
788 if (gtk_widget_get_mapped (widget) &&
789 viewport->shadow_type != GTK_SHADOW_NONE &&
790 (widget->allocation.width != allocation->width ||
791 widget->allocation.height != allocation->height))
792 gdk_window_invalidate_rect (widget->window, NULL, FALSE);
794 widget->allocation = *allocation;
796 viewport_set_hadjustment_values (viewport, &hadjustment_value_changed);
797 viewport_set_vadjustment_values (viewport, &vadjustment_value_changed);
799 child_allocation.x = 0;
800 child_allocation.y = 0;
801 child_allocation.width = hadjustment->upper;
802 child_allocation.height = vadjustment->upper;
803 if (gtk_widget_get_realized (widget))
805 GtkAllocation view_allocation;
806 gdk_window_move_resize (widget->window,
807 allocation->x + border_width,
808 allocation->y + border_width,
809 allocation->width - border_width * 2,
810 allocation->height - border_width * 2);
812 viewport_get_view_allocation (viewport, &view_allocation);
813 gdk_window_move_resize (viewport->view_window,
816 view_allocation.width,
817 view_allocation.height);
818 gdk_window_move_resize (viewport->bin_window,
819 - hadjustment->value,
820 - vadjustment->value,
821 child_allocation.width,
822 child_allocation.height);
824 if (bin->child && gtk_widget_get_visible (bin->child))
825 gtk_widget_size_allocate (bin->child, &child_allocation);
827 gtk_adjustment_changed (hadjustment);
828 gtk_adjustment_changed (vadjustment);
829 if (hadjustment_value_changed)
830 gtk_adjustment_value_changed (hadjustment);
831 if (vadjustment_value_changed)
832 gtk_adjustment_value_changed (vadjustment);
836 gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment,
839 GtkViewport *viewport = GTK_VIEWPORT (data);
840 GtkBin *bin = GTK_BIN (data);
842 if (bin->child && gtk_widget_get_visible (bin->child) &&
843 gtk_widget_get_realized (GTK_WIDGET (viewport)))
845 GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport);
846 GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport);
850 gdk_window_get_position (viewport->bin_window, &old_x, &old_y);
851 new_x = - hadjustment->value;
852 new_y = - vadjustment->value;
854 if (new_x != old_x || new_y != old_y)
856 gdk_window_move (viewport->bin_window, new_x, new_y);
857 gdk_window_process_updates (viewport->bin_window, TRUE);
863 gtk_viewport_style_set (GtkWidget *widget,
864 GtkStyle *previous_style)
866 if (gtk_widget_get_realized (widget) &&
867 gtk_widget_get_has_window (widget))
869 GtkViewport *viewport = GTK_VIEWPORT (widget);
871 gtk_style_set_background (widget->style, viewport->bin_window, GTK_STATE_NORMAL);
872 gtk_style_set_background (widget->style, widget->window, widget->state);
878 gtk_viewport_size_request_init (GtkSizeRequestIface *iface)
880 iface->get_width = gtk_viewport_get_width;
881 iface->get_height = gtk_viewport_get_height;
885 gtk_viewport_get_size (GtkSizeRequest *widget,
886 GtkOrientation orientation,
891 gint child_min, child_nat;
892 gint minimum, natural;
894 child = gtk_bin_get_child (GTK_BIN (widget));
896 /* XXX This should probably be (border_width * 2); but GTK+ has
897 * been doing this with a single border for a while now...
899 minimum = GTK_CONTAINER (widget)->border_width;
901 if (GTK_VIEWPORT (widget)->shadow_type != GTK_SHADOW_NONE)
903 if (orientation == GTK_ORIENTATION_HORIZONTAL)
904 minimum += 2 * GTK_WIDGET (widget)->style->xthickness;
906 minimum += 2 * GTK_WIDGET (widget)->style->ythickness;
911 if (child && gtk_widget_get_visible (child))
913 if (orientation == GTK_ORIENTATION_HORIZONTAL)
914 gtk_size_request_get_width (GTK_SIZE_REQUEST (child), &child_min, &child_nat);
916 gtk_size_request_get_height (GTK_SIZE_REQUEST (child), &child_min, &child_nat);
918 minimum += child_min;
919 natural += child_nat;
923 *minimum_size = minimum;
926 *natural_size = natural;
930 gtk_viewport_get_width (GtkSizeRequest *widget,
934 gtk_viewport_get_size (widget, GTK_ORIENTATION_HORIZONTAL, minimum_size, natural_size);
938 gtk_viewport_get_height (GtkSizeRequest *widget,
942 gtk_viewport_get_size (widget, GTK_ORIENTATION_VERTICAL, minimum_size, natural_size);