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"
30 #include "gtkmarshalers.h"
31 #include "gtkprivate.h"
42 static void gtk_viewport_finalize (GObject *object);
43 static void gtk_viewport_destroy (GtkObject *object);
44 static void gtk_viewport_set_property (GObject *object,
48 static void gtk_viewport_get_property (GObject *object,
52 static void gtk_viewport_set_scroll_adjustments (GtkViewport *viewport,
53 GtkAdjustment *hadjustment,
54 GtkAdjustment *vadjustment);
55 static void gtk_viewport_realize (GtkWidget *widget);
56 static void gtk_viewport_unrealize (GtkWidget *widget);
57 static void gtk_viewport_paint (GtkWidget *widget,
59 static gint gtk_viewport_expose (GtkWidget *widget,
60 GdkEventExpose *event);
61 static void gtk_viewport_add (GtkContainer *container,
63 static void gtk_viewport_size_request (GtkWidget *widget,
64 GtkRequisition *requisition);
65 static void gtk_viewport_size_allocate (GtkWidget *widget,
66 GtkAllocation *allocation);
67 static void gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment,
69 static void gtk_viewport_style_set (GtkWidget *widget,
70 GtkStyle *previous_style);
72 G_DEFINE_TYPE (GtkViewport, gtk_viewport, GTK_TYPE_BIN)
75 gtk_viewport_class_init (GtkViewportClass *class)
77 GtkObjectClass *object_class;
78 GObjectClass *gobject_class;
79 GtkWidgetClass *widget_class;
80 GtkContainerClass *container_class;
82 object_class = (GtkObjectClass*) class;
83 gobject_class = G_OBJECT_CLASS (class);
84 widget_class = (GtkWidgetClass*) class;
85 container_class = (GtkContainerClass*) class;
87 gobject_class->finalize = gtk_viewport_finalize;
88 gobject_class->set_property = gtk_viewport_set_property;
89 gobject_class->get_property = gtk_viewport_get_property;
90 object_class->destroy = gtk_viewport_destroy;
92 widget_class->realize = gtk_viewport_realize;
93 widget_class->unrealize = gtk_viewport_unrealize;
94 widget_class->expose_event = gtk_viewport_expose;
95 widget_class->size_request = gtk_viewport_size_request;
96 widget_class->size_allocate = gtk_viewport_size_allocate;
97 widget_class->style_set = gtk_viewport_style_set;
99 container_class->add = gtk_viewport_add;
101 class->set_scroll_adjustments = gtk_viewport_set_scroll_adjustments;
103 g_object_class_install_property (gobject_class,
105 g_param_spec_object ("hadjustment",
106 P_("Horizontal adjustment"),
107 P_("The GtkAdjustment that determines the values of the horizontal position for this viewport"),
109 GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
111 g_object_class_install_property (gobject_class,
113 g_param_spec_object ("vadjustment",
114 P_("Vertical adjustment"),
115 P_("The GtkAdjustment that determines the values of the vertical position for this viewport"),
117 GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
119 g_object_class_install_property (gobject_class,
121 g_param_spec_enum ("shadow-type",
123 P_("Determines how the shadowed box around the viewport is drawn"),
124 GTK_TYPE_SHADOW_TYPE,
126 GTK_PARAM_READWRITE));
129 * GtkViewport::set-scroll-adjustments
130 * @horizontal: the horizontal #GtkAdjustment
131 * @vertical: the vertical #GtkAdjustment
133 * Set the scroll adjustments for the viewport. Usually scrolled containers
134 * like #GtkScrolledWindow will emit this signal to connect two instances
135 * of #GtkScrollbar to the scroll directions of the #GtkViewport.
137 widget_class->set_scroll_adjustments_signal =
138 g_signal_new (I_("set-scroll-adjustments"),
139 G_OBJECT_CLASS_TYPE (gobject_class),
140 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
141 G_STRUCT_OFFSET (GtkViewportClass, set_scroll_adjustments),
143 _gtk_marshal_VOID__OBJECT_OBJECT,
146 GTK_TYPE_ADJUSTMENT);
150 gtk_viewport_set_property (GObject *object,
155 GtkViewport *viewport;
157 viewport = GTK_VIEWPORT (object);
161 case PROP_HADJUSTMENT:
162 gtk_viewport_set_hadjustment (viewport, g_value_get_object (value));
164 case PROP_VADJUSTMENT:
165 gtk_viewport_set_vadjustment (viewport, g_value_get_object (value));
167 case PROP_SHADOW_TYPE:
168 gtk_viewport_set_shadow_type (viewport, g_value_get_enum (value));
171 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
177 gtk_viewport_get_property (GObject *object,
182 GtkViewport *viewport;
184 viewport = GTK_VIEWPORT (object);
188 case PROP_HADJUSTMENT:
189 g_value_set_object (value, viewport->hadjustment);
191 case PROP_VADJUSTMENT:
192 g_value_set_object (value, viewport->vadjustment);
194 case PROP_SHADOW_TYPE:
195 g_value_set_enum (value, viewport->shadow_type);
198 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
204 gtk_viewport_init (GtkViewport *viewport)
206 GTK_WIDGET_UNSET_FLAGS (viewport, GTK_NO_WINDOW);
208 gtk_widget_set_redraw_on_allocate (GTK_WIDGET (viewport), FALSE);
209 gtk_container_set_resize_mode (GTK_CONTAINER (viewport), GTK_RESIZE_QUEUE);
211 viewport->shadow_type = GTK_SHADOW_IN;
212 viewport->view_window = NULL;
213 viewport->bin_window = NULL;
214 viewport->hadjustment = NULL;
215 viewport->vadjustment = NULL;
220 * @hadjustment: horizontal adjustment.
221 * @vadjustment: vertical adjustment.
222 * @returns: a new #GtkViewport.
224 * Creates a new #GtkViewport with the given adjustments.
228 gtk_viewport_new (GtkAdjustment *hadjustment,
229 GtkAdjustment *vadjustment)
233 viewport = g_object_new (GTK_TYPE_VIEWPORT,
234 "hadjustment", hadjustment,
235 "vadjustment", vadjustment,
241 #define ADJUSTMENT_POINTER(viewport, orientation) \
242 (((orientation) == GTK_ORIENTATION_HORIZONTAL) ? \
243 &(viewport)->hadjustment : &(viewport)->vadjustment)
246 viewport_disconnect_adjustment (GtkViewport *viewport,
247 GtkOrientation orientation)
249 GtkAdjustment **adjustmentp = ADJUSTMENT_POINTER (viewport, orientation);
253 g_signal_handlers_disconnect_by_func (*adjustmentp,
254 gtk_viewport_adjustment_value_changed,
256 g_object_unref (*adjustmentp);
262 gtk_viewport_finalize (GObject *object)
264 GtkViewport *viewport = GTK_VIEWPORT (object);
266 viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL);
267 viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_VERTICAL);
269 G_OBJECT_CLASS (gtk_viewport_parent_class)->finalize (object);
273 gtk_viewport_destroy (GtkObject *object)
275 GtkViewport *viewport = GTK_VIEWPORT (object);
277 viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL);
278 viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_VERTICAL);
280 GTK_OBJECT_CLASS (gtk_viewport_parent_class)->destroy (object);
284 * gtk_viewport_get_hadjustment:
285 * @viewport: a #GtkViewport.
287 * Returns the horizontal adjustment of the viewport.
289 * Return value: the horizontal adjustment of @viewport.
292 gtk_viewport_get_hadjustment (GtkViewport *viewport)
294 g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
296 if (!viewport->hadjustment)
297 gtk_viewport_set_hadjustment (viewport, NULL);
299 return viewport->hadjustment;
303 * gtk_viewport_get_vadjustment:
304 * @viewport: a #GtkViewport.
306 * Returns the vertical adjustment of the viewport.
308 * Return value: the vertical adjustment of @viewport.
311 gtk_viewport_get_vadjustment (GtkViewport *viewport)
313 g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
315 if (!viewport->vadjustment)
316 gtk_viewport_set_vadjustment (viewport, NULL);
318 return viewport->vadjustment;
322 viewport_get_view_allocation (GtkViewport *viewport,
323 GtkAllocation *view_allocation)
325 GtkWidget *widget = GTK_WIDGET (viewport);
326 GtkAllocation *allocation = &widget->allocation;
327 gint border_width = GTK_CONTAINER (viewport)->border_width;
329 view_allocation->x = 0;
330 view_allocation->y = 0;
332 if (viewport->shadow_type != GTK_SHADOW_NONE)
334 view_allocation->x = widget->style->xthickness;
335 view_allocation->y = widget->style->ythickness;
338 view_allocation->width = MAX (1, allocation->width - view_allocation->x * 2 - border_width * 2);
339 view_allocation->height = MAX (1, allocation->height - view_allocation->y * 2 - border_width * 2);
343 viewport_reclamp_adjustment (GtkAdjustment *adjustment,
344 gboolean *value_changed)
346 gdouble value = adjustment->value;
348 value = CLAMP (value, 0, adjustment->upper - adjustment->page_size);
349 if (value != adjustment->value)
351 adjustment->value = value;
353 *value_changed = TRUE;
355 else if (value_changed)
356 *value_changed = FALSE;
360 viewport_set_hadjustment_values (GtkViewport *viewport,
361 gboolean *value_changed)
363 GtkBin *bin = GTK_BIN (viewport);
364 GtkAllocation view_allocation;
365 GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport);
366 gdouble old_page_size;
370 viewport_get_view_allocation (viewport, &view_allocation);
372 old_page_size = hadjustment->page_size;
373 old_upper = hadjustment->upper;
374 old_value = hadjustment->value;
375 hadjustment->page_size = view_allocation.width;
376 hadjustment->step_increment = view_allocation.width * 0.1;
377 hadjustment->page_increment = view_allocation.width * 0.9;
379 hadjustment->lower = 0;
381 if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
383 GtkRequisition child_requisition;
385 gtk_widget_get_child_requisition (bin->child, &child_requisition);
386 hadjustment->upper = MAX (child_requisition.width, view_allocation.width);
389 hadjustment->upper = view_allocation.width;
391 if (gtk_widget_get_direction (GTK_WIDGET (viewport)) == GTK_TEXT_DIR_RTL)
393 gdouble dist = old_upper - (old_value + old_page_size);
394 hadjustment->value = hadjustment->upper - dist - hadjustment->page_size;
395 viewport_reclamp_adjustment (hadjustment, value_changed);
396 *value_changed = (old_value != hadjustment->value);
399 viewport_reclamp_adjustment (hadjustment, value_changed);
403 viewport_set_vadjustment_values (GtkViewport *viewport,
404 gboolean *value_changed)
406 GtkBin *bin = GTK_BIN (viewport);
407 GtkAllocation view_allocation;
408 GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport);
410 viewport_get_view_allocation (viewport, &view_allocation);
412 vadjustment->page_size = view_allocation.height;
413 vadjustment->step_increment = view_allocation.height * 0.1;
414 vadjustment->page_increment = view_allocation.height * 0.9;
416 vadjustment->lower = 0;
418 if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
420 GtkRequisition child_requisition;
422 gtk_widget_get_child_requisition (bin->child, &child_requisition);
423 vadjustment->upper = MAX (child_requisition.height, view_allocation.height);
426 vadjustment->upper = view_allocation.height;
428 viewport_reclamp_adjustment (vadjustment, value_changed);
432 viewport_set_adjustment (GtkViewport *viewport,
433 GtkOrientation orientation,
434 GtkAdjustment *adjustment)
436 GtkAdjustment **adjustmentp = ADJUSTMENT_POINTER (viewport, orientation);
437 gboolean value_changed;
439 if (adjustment && adjustment == *adjustmentp)
443 adjustment = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0,
445 viewport_disconnect_adjustment (viewport, orientation);
446 *adjustmentp = adjustment;
447 g_object_ref_sink (adjustment);
449 if (orientation == GTK_ORIENTATION_HORIZONTAL)
450 viewport_set_hadjustment_values (viewport, &value_changed);
452 viewport_set_vadjustment_values (viewport, &value_changed);
454 g_signal_connect (adjustment, "value-changed",
455 G_CALLBACK (gtk_viewport_adjustment_value_changed),
458 gtk_adjustment_changed (adjustment);
461 gtk_adjustment_value_changed (adjustment);
463 gtk_viewport_adjustment_value_changed (adjustment, viewport);
467 * gtk_viewport_set_hadjustment:
468 * @viewport: a #GtkViewport.
469 * @adjustment: a #GtkAdjustment.
471 * Sets the horizontal adjustment of the viewport.
474 gtk_viewport_set_hadjustment (GtkViewport *viewport,
475 GtkAdjustment *adjustment)
477 g_return_if_fail (GTK_IS_VIEWPORT (viewport));
479 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
481 viewport_set_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL, adjustment);
483 g_object_notify (G_OBJECT (viewport), "hadjustment");
487 * gtk_viewport_set_vadjustment:
488 * @viewport: a #GtkViewport.
489 * @adjustment: a #GtkAdjustment.
491 * Sets the vertical adjustment of the viewport.
494 gtk_viewport_set_vadjustment (GtkViewport *viewport,
495 GtkAdjustment *adjustment)
497 g_return_if_fail (GTK_IS_VIEWPORT (viewport));
499 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
501 viewport_set_adjustment (viewport, GTK_ORIENTATION_VERTICAL, adjustment);
503 g_object_notify (G_OBJECT (viewport), "vadjustment");
507 gtk_viewport_set_scroll_adjustments (GtkViewport *viewport,
508 GtkAdjustment *hadjustment,
509 GtkAdjustment *vadjustment)
511 gtk_viewport_set_hadjustment (viewport, hadjustment);
512 gtk_viewport_set_vadjustment (viewport, vadjustment);
516 * gtk_viewport_set_shadow_type:
517 * @viewport: a #GtkViewport.
518 * @type: the new shadow type.
520 * Sets the shadow type of the viewport.
523 gtk_viewport_set_shadow_type (GtkViewport *viewport,
526 g_return_if_fail (GTK_IS_VIEWPORT (viewport));
528 if ((GtkShadowType) viewport->shadow_type != type)
530 viewport->shadow_type = type;
532 if (GTK_WIDGET_VISIBLE (viewport))
534 gtk_widget_size_allocate (GTK_WIDGET (viewport), &(GTK_WIDGET (viewport)->allocation));
535 gtk_widget_queue_draw (GTK_WIDGET (viewport));
538 g_object_notify (G_OBJECT (viewport), "shadow-type");
543 * gtk_viewport_get_shadow_type:
544 * @viewport: a #GtkViewport
546 * Gets the shadow type of the #GtkViewport. See
547 * gtk_viewport_set_shadow_type().
549 * Return value: the shadow type
552 gtk_viewport_get_shadow_type (GtkViewport *viewport)
554 g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), GTK_SHADOW_NONE);
556 return viewport->shadow_type;
560 gtk_viewport_realize (GtkWidget *widget)
562 GtkViewport *viewport = GTK_VIEWPORT (widget);
563 GtkBin *bin = GTK_BIN (widget);
564 GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport);
565 GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport);
566 gint border_width = GTK_CONTAINER (widget)->border_width;
568 GtkAllocation view_allocation;
569 GdkWindowAttr attributes;
570 gint attributes_mask;
573 GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
575 attributes.x = widget->allocation.x + border_width;
576 attributes.y = widget->allocation.y + border_width;
577 attributes.width = widget->allocation.width - border_width * 2;
578 attributes.height = widget->allocation.height - border_width * 2;
579 attributes.window_type = GDK_WINDOW_CHILD;
580 attributes.wclass = GDK_INPUT_OUTPUT;
581 attributes.visual = gtk_widget_get_visual (widget);
582 attributes.colormap = gtk_widget_get_colormap (widget);
584 event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
585 /* We select on button_press_mask so that button 4-5 scrolls are trapped.
587 attributes.event_mask = event_mask | GDK_BUTTON_PRESS_MASK;
589 attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
591 widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
592 &attributes, attributes_mask);
593 gdk_window_set_user_data (widget->window, viewport);
595 viewport_get_view_allocation (viewport, &view_allocation);
597 attributes.x = view_allocation.x;
598 attributes.y = view_allocation.y;
599 attributes.width = view_allocation.width;
600 attributes.height = view_allocation.height;
601 attributes.event_mask = 0;
603 viewport->view_window = gdk_window_new (widget->window, &attributes, attributes_mask);
604 gdk_window_set_user_data (viewport->view_window, viewport);
606 gdk_window_set_back_pixmap (viewport->view_window, NULL, FALSE);
608 attributes.x = - hadjustment->value;
609 attributes.y = - vadjustment->value;
610 attributes.width = hadjustment->upper;
611 attributes.height = vadjustment->upper;
613 attributes.event_mask = event_mask;
615 viewport->bin_window = gdk_window_new (viewport->view_window, &attributes, attributes_mask);
616 gdk_window_set_user_data (viewport->bin_window, viewport);
619 gtk_widget_set_parent_window (bin->child, viewport->bin_window);
621 widget->style = gtk_style_attach (widget->style, widget->window);
622 gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
623 gtk_style_set_background (widget->style, viewport->bin_window, GTK_STATE_NORMAL);
625 /* Call paint here to allow a theme to set the background without flashing
627 gtk_paint_flat_box(widget->style, viewport->bin_window, GTK_STATE_NORMAL,
629 NULL, widget, "viewportbin",
632 gdk_window_show (viewport->bin_window);
633 gdk_window_show (viewport->view_window);
637 gtk_viewport_unrealize (GtkWidget *widget)
639 GtkViewport *viewport = GTK_VIEWPORT (widget);
641 gdk_window_set_user_data (viewport->view_window, NULL);
642 gdk_window_destroy (viewport->view_window);
643 viewport->view_window = NULL;
645 gdk_window_set_user_data (viewport->bin_window, NULL);
646 gdk_window_destroy (viewport->bin_window);
647 viewport->bin_window = NULL;
649 GTK_WIDGET_CLASS (gtk_viewport_parent_class)->unrealize (widget);
653 gtk_viewport_paint (GtkWidget *widget,
656 if (GTK_WIDGET_DRAWABLE (widget))
658 GtkViewport *viewport = GTK_VIEWPORT (widget);
660 gtk_paint_shadow (widget->style, widget->window,
661 GTK_STATE_NORMAL, viewport->shadow_type,
662 area, widget, "viewport",
668 gtk_viewport_expose (GtkWidget *widget,
669 GdkEventExpose *event)
671 GtkViewport *viewport;
673 if (GTK_WIDGET_DRAWABLE (widget))
675 viewport = GTK_VIEWPORT (widget);
677 if (event->window == widget->window)
678 gtk_viewport_paint (widget, &event->area);
679 else if (event->window == viewport->bin_window)
681 gtk_paint_flat_box(widget->style, viewport->bin_window,
682 GTK_STATE_NORMAL, GTK_SHADOW_NONE,
683 &event->area, widget, "viewportbin",
686 GTK_WIDGET_CLASS (gtk_viewport_parent_class)->expose_event (widget, event);
694 gtk_viewport_add (GtkContainer *container,
697 GtkBin *bin = GTK_BIN (container);
699 g_return_if_fail (bin->child == NULL);
701 gtk_widget_set_parent_window (child, GTK_VIEWPORT (bin)->bin_window);
703 GTK_CONTAINER_CLASS (gtk_viewport_parent_class)->add (container, child);
707 gtk_viewport_size_request (GtkWidget *widget,
708 GtkRequisition *requisition)
710 GtkBin *bin = GTK_BIN (widget);
711 GtkRequisition child_requisition;
713 requisition->width = GTK_CONTAINER (widget)->border_width;
715 requisition->height = GTK_CONTAINER (widget)->border_width;
717 if (GTK_VIEWPORT (widget)->shadow_type != GTK_SHADOW_NONE)
719 requisition->width += 2 * widget->style->xthickness;
720 requisition->height += 2 * widget->style->ythickness;
723 if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
725 gtk_widget_size_request (bin->child, &child_requisition);
726 requisition->width += child_requisition.width;
727 requisition->height += child_requisition.height;
732 gtk_viewport_size_allocate (GtkWidget *widget,
733 GtkAllocation *allocation)
735 GtkViewport *viewport = GTK_VIEWPORT (widget);
736 GtkBin *bin = GTK_BIN (widget);
737 gint border_width = GTK_CONTAINER (widget)->border_width;
738 gboolean hadjustment_value_changed, vadjustment_value_changed;
739 GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport);
740 GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport);
741 GtkAllocation child_allocation;
743 /* If our size changed, and we have a shadow, queue a redraw on widget->window to
744 * redraw the shadow correctly.
746 if (GTK_WIDGET_MAPPED (widget) &&
747 viewport->shadow_type != GTK_SHADOW_NONE &&
748 (widget->allocation.width != allocation->width ||
749 widget->allocation.height != allocation->height))
750 gdk_window_invalidate_rect (widget->window, NULL, FALSE);
752 widget->allocation = *allocation;
754 viewport_set_hadjustment_values (viewport, &hadjustment_value_changed);
755 viewport_set_vadjustment_values (viewport, &vadjustment_value_changed);
757 child_allocation.x = 0;
758 child_allocation.y = 0;
759 child_allocation.width = hadjustment->upper;
760 child_allocation.height = vadjustment->upper;
761 if (GTK_WIDGET_REALIZED (widget))
763 GtkAllocation view_allocation;
764 gdk_window_move_resize (widget->window,
765 allocation->x + border_width,
766 allocation->y + border_width,
767 allocation->width - border_width * 2,
768 allocation->height - border_width * 2);
770 viewport_get_view_allocation (viewport, &view_allocation);
771 gdk_window_move_resize (viewport->view_window,
774 view_allocation.width,
775 view_allocation.height);
776 gdk_window_move_resize (viewport->bin_window,
777 - hadjustment->value,
778 - vadjustment->value,
779 child_allocation.width,
780 child_allocation.height);
782 if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
783 gtk_widget_size_allocate (bin->child, &child_allocation);
785 gtk_adjustment_changed (hadjustment);
786 gtk_adjustment_changed (vadjustment);
787 if (hadjustment_value_changed)
788 gtk_adjustment_value_changed (hadjustment);
789 if (vadjustment_value_changed)
790 gtk_adjustment_value_changed (vadjustment);
794 gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment,
797 GtkViewport *viewport = GTK_VIEWPORT (data);
798 GtkBin *bin = GTK_BIN (data);
800 if (bin->child && GTK_WIDGET_VISIBLE (bin->child) &&
801 GTK_WIDGET_REALIZED (viewport))
803 GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport);
804 GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport);
808 gdk_window_get_position (viewport->bin_window, &old_x, &old_y);
809 new_x = - hadjustment->value;
810 new_y = - vadjustment->value;
812 if (new_x != old_x || new_y != old_y)
814 gdk_window_move (viewport->bin_window, new_x, new_y);
815 gdk_window_process_updates (viewport->bin_window, TRUE);
821 gtk_viewport_style_set (GtkWidget *widget,
822 GtkStyle *previous_style)
824 if (GTK_WIDGET_REALIZED (widget) &&
825 !GTK_WIDGET_NO_WINDOW (widget))
827 GtkViewport *viewport = GTK_VIEWPORT (widget);
829 gtk_style_set_background (widget->style, viewport->bin_window, GTK_STATE_NORMAL);
830 gtk_style_set_background (widget->style, widget->window, widget->state);
834 #define __GTK_VIEWPORT_C__
835 #include "gtkaliasdef.c"