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, see <http://www.gnu.org/licenses/>.
19 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
20 * file for a list of people on the GTK+ Team. See the ChangeLog
21 * files for a list of changes. These files are distributed with
22 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
27 #include "gtkviewport.h"
29 #include "gtkadjustment.h"
31 #include "gtkmarshalers.h"
32 #include "gtkprivate.h"
33 #include "gtkscrollable.h"
34 #include "gtktypebuiltins.h"
39 * @Short_description: An adapter which makes widgets scrollable
41 * @See_also:#GtkScrolledWindow, #GtkAdjustment
43 * The #GtkViewport widget acts as an adaptor class, implementing
44 * scrollability for child widgets that lack their own scrolling
45 * capabilities. Use #GtkViewport to scroll child widgets such as
46 * #GtkGrid, #GtkBox, and so on.
48 * If a widget has native scrolling abilities, such as #GtkTextView,
49 * #GtkTreeView or #GtkIconView, it can be added to a #GtkScrolledWindow
50 * with gtk_container_add(). If a widget does not, you must first add the
51 * widget to a #GtkViewport, then add the viewport to the scrolled window.
52 * gtk_container_add() does this automatically if a child that does not
53 * implement #GtkScrollable is added to a #GtkScrolledWindow, so you can
54 * ignore the presence of the viewport.
56 * The #GtkViewport will start scrolling content only if allocated less
57 * than the child widget's minimum size in a given orientation.
60 struct _GtkViewportPrivate
62 GtkAdjustment *hadjustment;
63 GtkAdjustment *vadjustment;
64 GtkShadowType shadow_type;
66 GdkWindow *bin_window;
67 GdkWindow *view_window;
69 /* GtkScrollablePolicy needs to be checked when
70 * driving the scrollable adjustment values */
71 guint hscroll_policy : 1;
72 guint vscroll_policy : 1;
85 static void gtk_viewport_set_property (GObject *object,
89 static void gtk_viewport_get_property (GObject *object,
93 static void gtk_viewport_destroy (GtkWidget *widget);
94 static void gtk_viewport_realize (GtkWidget *widget);
95 static void gtk_viewport_unrealize (GtkWidget *widget);
96 static gint gtk_viewport_draw (GtkWidget *widget,
98 static void gtk_viewport_add (GtkContainer *container,
100 static void gtk_viewport_size_allocate (GtkWidget *widget,
101 GtkAllocation *allocation);
102 static void gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment,
104 static void gtk_viewport_style_updated (GtkWidget *widget);
106 static void gtk_viewport_get_preferred_width (GtkWidget *widget,
109 static void gtk_viewport_get_preferred_height (GtkWidget *widget,
113 static void viewport_set_adjustment (GtkViewport *viewport,
114 GtkOrientation orientation,
115 GtkAdjustment *adjustment);
117 G_DEFINE_TYPE_WITH_CODE (GtkViewport, gtk_viewport, GTK_TYPE_BIN,
118 G_IMPLEMENT_INTERFACE (GTK_TYPE_SCROLLABLE, NULL))
121 gtk_viewport_class_init (GtkViewportClass *class)
123 GObjectClass *gobject_class;
124 GtkWidgetClass *widget_class;
125 GtkContainerClass *container_class;
127 gobject_class = G_OBJECT_CLASS (class);
128 widget_class = (GtkWidgetClass*) class;
129 container_class = (GtkContainerClass*) class;
131 gobject_class->set_property = gtk_viewport_set_property;
132 gobject_class->get_property = gtk_viewport_get_property;
134 widget_class->destroy = gtk_viewport_destroy;
135 widget_class->realize = gtk_viewport_realize;
136 widget_class->unrealize = gtk_viewport_unrealize;
137 widget_class->draw = gtk_viewport_draw;
138 widget_class->size_allocate = gtk_viewport_size_allocate;
139 widget_class->style_updated = gtk_viewport_style_updated;
140 widget_class->get_preferred_width = gtk_viewport_get_preferred_width;
141 widget_class->get_preferred_height = gtk_viewport_get_preferred_height;
143 gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_VIEWPORT);
145 container_class->add = gtk_viewport_add;
147 /* GtkScrollable implementation */
148 g_object_class_override_property (gobject_class, PROP_HADJUSTMENT, "hadjustment");
149 g_object_class_override_property (gobject_class, PROP_VADJUSTMENT, "vadjustment");
150 g_object_class_override_property (gobject_class, PROP_HSCROLL_POLICY, "hscroll-policy");
151 g_object_class_override_property (gobject_class, PROP_VSCROLL_POLICY, "vscroll-policy");
153 g_object_class_install_property (gobject_class,
155 g_param_spec_enum ("shadow-type",
157 P_("Determines how the shadowed box around the viewport is drawn"),
158 GTK_TYPE_SHADOW_TYPE,
160 GTK_PARAM_READWRITE));
162 g_type_class_add_private (class, sizeof (GtkViewportPrivate));
166 gtk_viewport_set_property (GObject *object,
171 GtkViewport *viewport;
173 viewport = GTK_VIEWPORT (object);
177 case PROP_HADJUSTMENT:
178 viewport_set_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL, g_value_get_object (value));
180 case PROP_VADJUSTMENT:
181 viewport_set_adjustment (viewport, GTK_ORIENTATION_VERTICAL, g_value_get_object (value));
183 case PROP_HSCROLL_POLICY:
184 viewport->priv->hscroll_policy = g_value_get_enum (value);
185 gtk_widget_queue_resize (GTK_WIDGET (viewport));
187 case PROP_VSCROLL_POLICY:
188 viewport->priv->vscroll_policy = g_value_get_enum (value);
189 gtk_widget_queue_resize (GTK_WIDGET (viewport));
191 case PROP_SHADOW_TYPE:
192 gtk_viewport_set_shadow_type (viewport, g_value_get_enum (value));
195 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
201 gtk_viewport_get_property (GObject *object,
206 GtkViewport *viewport = GTK_VIEWPORT (object);
207 GtkViewportPrivate *priv = viewport->priv;
211 case PROP_HADJUSTMENT:
212 g_value_set_object (value, priv->hadjustment);
214 case PROP_VADJUSTMENT:
215 g_value_set_object (value, priv->vadjustment);
217 case PROP_HSCROLL_POLICY:
218 g_value_set_enum (value, priv->hscroll_policy);
220 case PROP_VSCROLL_POLICY:
221 g_value_set_enum (value, priv->vscroll_policy);
223 case PROP_SHADOW_TYPE:
224 g_value_set_enum (value, priv->shadow_type);
227 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
233 gtk_viewport_init (GtkViewport *viewport)
235 GtkViewportPrivate *priv;
237 viewport->priv = G_TYPE_INSTANCE_GET_PRIVATE (viewport,
240 priv = viewport->priv;
242 gtk_widget_set_has_window (GTK_WIDGET (viewport), TRUE);
244 gtk_widget_set_redraw_on_allocate (GTK_WIDGET (viewport), FALSE);
246 priv->shadow_type = GTK_SHADOW_IN;
247 priv->view_window = NULL;
248 priv->bin_window = NULL;
249 priv->hadjustment = NULL;
250 priv->vadjustment = NULL;
252 viewport_set_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL, NULL);
253 viewport_set_adjustment (viewport, GTK_ORIENTATION_VERTICAL, NULL);
258 * @hadjustment: horizontal adjustment
259 * @vadjustment: vertical adjustment
261 * Creates a new #GtkViewport with the given adjustments.
263 * Returns: a new #GtkViewport
266 gtk_viewport_new (GtkAdjustment *hadjustment,
267 GtkAdjustment *vadjustment)
271 viewport = g_object_new (GTK_TYPE_VIEWPORT,
272 "hadjustment", hadjustment,
273 "vadjustment", vadjustment,
279 #define ADJUSTMENT_POINTER(viewport, orientation) \
280 (((orientation) == GTK_ORIENTATION_HORIZONTAL) ? \
281 &(viewport)->priv->hadjustment : &(viewport)->priv->vadjustment)
284 viewport_disconnect_adjustment (GtkViewport *viewport,
285 GtkOrientation orientation)
287 GtkAdjustment **adjustmentp = ADJUSTMENT_POINTER (viewport, orientation);
291 g_signal_handlers_disconnect_by_func (*adjustmentp,
292 gtk_viewport_adjustment_value_changed,
294 g_object_unref (*adjustmentp);
300 gtk_viewport_destroy (GtkWidget *widget)
302 GtkViewport *viewport = GTK_VIEWPORT (widget);
304 viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL);
305 viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_VERTICAL);
307 GTK_WIDGET_CLASS (gtk_viewport_parent_class)->destroy (widget);
311 viewport_get_view_allocation (GtkViewport *viewport,
312 GtkAllocation *view_allocation)
314 GtkViewportPrivate *priv = viewport->priv;
315 GtkWidget *widget = GTK_WIDGET (viewport);
316 GtkAllocation allocation;
317 GtkStyleContext *context;
319 GtkBorder padding, border;
322 gtk_widget_get_allocation (widget, &allocation);
323 border_width = gtk_container_get_border_width (GTK_CONTAINER (viewport));
325 view_allocation->x = 0;
326 view_allocation->y = 0;
328 context = gtk_widget_get_style_context (widget);
329 state = gtk_widget_get_state_flags (widget);
330 gtk_style_context_save (context);
331 gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
333 gtk_style_context_get_padding (context, state, &padding);
334 gtk_style_context_get_border (context, state, &border);
336 gtk_style_context_restore (context);
338 if (priv->shadow_type != GTK_SHADOW_NONE)
340 view_allocation->x = border.left;
341 view_allocation->y = border.top;
344 view_allocation->x += padding.left;
345 view_allocation->y += padding.top;
346 view_allocation->width = MAX (1, allocation.width - padding.left - padding.right - border_width * 2);
347 view_allocation->height = MAX (1, allocation.height - padding.top - padding.bottom - border_width * 2);
349 if (priv->shadow_type != GTK_SHADOW_NONE)
351 view_allocation->width = MAX (1, view_allocation->width - border.left - border.right);
352 view_allocation->height = MAX (1, view_allocation->height - border.top - border.bottom);
357 * gtk_viewport_get_hadjustment:
358 * @viewport: a #GtkViewport.
360 * Returns the horizontal adjustment of the viewport.
362 * Return value: (transfer none): the horizontal adjustment of @viewport.
364 * Deprecated: 3.0: Use gtk_scrollable_get_hadjustment()
367 gtk_viewport_get_hadjustment (GtkViewport *viewport)
369 g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
371 return viewport->priv->hadjustment;
375 * gtk_viewport_get_vadjustment:
376 * @viewport: a #GtkViewport.
378 * Returns the vertical adjustment of the viewport.
380 * Return value: (transfer none): the vertical adjustment of @viewport.
382 * Deprecated: 3.0: Use gtk_scrollable_get_vadjustment()
385 gtk_viewport_get_vadjustment (GtkViewport *viewport)
387 g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
389 return viewport->priv->vadjustment;
393 viewport_set_hadjustment_values (GtkViewport *viewport)
395 GtkBin *bin = GTK_BIN (viewport);
396 GtkAllocation view_allocation;
397 GtkAdjustment *hadjustment = viewport->priv->hadjustment;
399 gdouble upper, value;
401 viewport_get_view_allocation (viewport, &view_allocation);
403 child = gtk_bin_get_child (bin);
404 if (child && gtk_widget_get_visible (child))
406 gint minimum_width, natural_width;
409 if (viewport->priv->vscroll_policy == GTK_SCROLL_MINIMUM)
410 gtk_widget_get_preferred_height (child, &scroll_height, NULL);
412 gtk_widget_get_preferred_height (child, NULL, &scroll_height);
414 gtk_widget_get_preferred_width_for_height (child,
415 MAX (view_allocation.height, scroll_height),
419 if (viewport->priv->hscroll_policy == GTK_SCROLL_MINIMUM)
420 upper = MAX (minimum_width, view_allocation.width);
422 upper = MAX (natural_width, view_allocation.width);
425 upper = view_allocation.width;
427 value = gtk_adjustment_get_value (hadjustment);
428 /* We clamp to the left in RTL mode */
429 if (gtk_widget_get_direction (GTK_WIDGET (viewport)) == GTK_TEXT_DIR_RTL)
431 gdouble dist = gtk_adjustment_get_upper (hadjustment)
433 - gtk_adjustment_get_page_size (hadjustment);
434 value = upper - dist - view_allocation.width;
437 gtk_adjustment_configure (hadjustment,
441 view_allocation.width * 0.1,
442 view_allocation.width * 0.9,
443 view_allocation.width);
447 viewport_set_vadjustment_values (GtkViewport *viewport)
449 GtkBin *bin = GTK_BIN (viewport);
450 GtkAllocation view_allocation;
451 GtkAdjustment *vadjustment = viewport->priv->vadjustment;
455 viewport_get_view_allocation (viewport, &view_allocation);
457 child = gtk_bin_get_child (bin);
458 if (child && gtk_widget_get_visible (child))
460 gint minimum_height, natural_height;
463 if (viewport->priv->hscroll_policy == GTK_SCROLL_MINIMUM)
464 gtk_widget_get_preferred_width (child, &scroll_width, NULL);
466 gtk_widget_get_preferred_width (child, NULL, &scroll_width);
468 gtk_widget_get_preferred_height_for_width (child,
469 MAX (view_allocation.width, scroll_width),
473 if (viewport->priv->vscroll_policy == GTK_SCROLL_MINIMUM)
474 upper = MAX (minimum_height, view_allocation.height);
476 upper = MAX (natural_height, view_allocation.height);
479 upper = view_allocation.height;
481 gtk_adjustment_configure (vadjustment,
482 gtk_adjustment_get_value (vadjustment),
485 view_allocation.height * 0.1,
486 view_allocation.height * 0.9,
487 view_allocation.height);
491 viewport_set_adjustment (GtkViewport *viewport,
492 GtkOrientation orientation,
493 GtkAdjustment *adjustment)
495 GtkAdjustment **adjustmentp = ADJUSTMENT_POINTER (viewport, orientation);
497 if (adjustment && adjustment == *adjustmentp)
501 adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
502 viewport_disconnect_adjustment (viewport, orientation);
503 *adjustmentp = adjustment;
504 g_object_ref_sink (adjustment);
506 if (orientation == GTK_ORIENTATION_HORIZONTAL)
507 viewport_set_hadjustment_values (viewport);
509 viewport_set_vadjustment_values (viewport);
511 g_signal_connect (adjustment, "value-changed",
512 G_CALLBACK (gtk_viewport_adjustment_value_changed),
515 gtk_viewport_adjustment_value_changed (adjustment, viewport);
519 * gtk_viewport_set_hadjustment:
520 * @viewport: a #GtkViewport.
521 * @adjustment: (allow-none): a #GtkAdjustment.
523 * Sets the horizontal adjustment of the viewport.
525 * Deprecated: 3.0: Use gtk_scrollable_set_hadjustment()
528 gtk_viewport_set_hadjustment (GtkViewport *viewport,
529 GtkAdjustment *adjustment)
531 g_return_if_fail (GTK_IS_VIEWPORT (viewport));
533 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
535 viewport_set_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL, adjustment);
537 g_object_notify (G_OBJECT (viewport), "hadjustment");
541 * gtk_viewport_set_vadjustment:
542 * @viewport: a #GtkViewport.
543 * @adjustment: (allow-none): a #GtkAdjustment.
545 * Sets the vertical adjustment of the viewport.
547 * Deprecated: 3.0: Use gtk_scrollable_set_vadjustment()
550 gtk_viewport_set_vadjustment (GtkViewport *viewport,
551 GtkAdjustment *adjustment)
553 g_return_if_fail (GTK_IS_VIEWPORT (viewport));
555 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
557 viewport_set_adjustment (viewport, GTK_ORIENTATION_VERTICAL, adjustment);
559 g_object_notify (G_OBJECT (viewport), "vadjustment");
563 * gtk_viewport_set_shadow_type:
564 * @viewport: a #GtkViewport.
565 * @type: the new shadow type.
567 * Sets the shadow type of the viewport.
570 gtk_viewport_set_shadow_type (GtkViewport *viewport,
573 GtkViewportPrivate *priv;
574 GtkAllocation allocation;
577 g_return_if_fail (GTK_IS_VIEWPORT (viewport));
579 widget = GTK_WIDGET (viewport);
580 priv = viewport->priv;
582 if ((GtkShadowType) priv->shadow_type != type)
584 priv->shadow_type = type;
586 if (gtk_widget_get_visible (widget))
588 gtk_widget_get_allocation (widget, &allocation);
589 gtk_widget_size_allocate (widget, &allocation);
590 gtk_widget_set_allocation (widget, &allocation);
591 gtk_widget_queue_draw (widget);
594 g_object_notify (G_OBJECT (viewport), "shadow-type");
599 * gtk_viewport_get_shadow_type:
600 * @viewport: a #GtkViewport
602 * Gets the shadow type of the #GtkViewport. See
603 * gtk_viewport_set_shadow_type().
605 * Return value: the shadow type
608 gtk_viewport_get_shadow_type (GtkViewport *viewport)
610 g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), GTK_SHADOW_NONE);
612 return viewport->priv->shadow_type;
616 * gtk_viewport_get_bin_window:
617 * @viewport: a #GtkViewport
619 * Gets the bin window of the #GtkViewport.
621 * Return value: (transfer none): a #GdkWindow
626 gtk_viewport_get_bin_window (GtkViewport *viewport)
628 g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
630 return viewport->priv->bin_window;
634 * gtk_viewport_get_view_window:
635 * @viewport: a #GtkViewport
637 * Gets the view window of the #GtkViewport.
639 * Return value: (transfer none): a #GdkWindow
644 gtk_viewport_get_view_window (GtkViewport *viewport)
646 g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
648 return viewport->priv->view_window;
652 gtk_viewport_realize (GtkWidget *widget)
654 GtkViewport *viewport = GTK_VIEWPORT (widget);
655 GtkViewportPrivate *priv = viewport->priv;
656 GtkBin *bin = GTK_BIN (widget);
657 GtkAdjustment *hadjustment = priv->hadjustment;
658 GtkAdjustment *vadjustment = priv->vadjustment;
659 GtkAllocation allocation;
660 GtkAllocation view_allocation;
661 GtkStyleContext *context;
664 GdkWindowAttr attributes;
665 gint attributes_mask;
669 border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
671 gtk_widget_set_realized (widget, TRUE);
673 gtk_widget_get_allocation (widget, &allocation);
675 attributes.x = allocation.x + border_width;
676 attributes.y = allocation.y + border_width;
677 attributes.width = allocation.width - border_width * 2;
678 attributes.height = allocation.height - border_width * 2;
679 attributes.window_type = GDK_WINDOW_CHILD;
680 attributes.wclass = GDK_INPUT_OUTPUT;
681 attributes.visual = gtk_widget_get_visual (widget);
683 event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
685 attributes.event_mask = event_mask | GDK_SCROLL_MASK | GDK_TOUCH_MASK | GDK_SMOOTH_SCROLL_MASK;
687 attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
689 window = gdk_window_new (gtk_widget_get_parent_window (widget),
690 &attributes, attributes_mask);
691 gtk_widget_set_window (widget, window);
692 gdk_window_set_user_data (window, viewport);
694 viewport_get_view_allocation (viewport, &view_allocation);
696 attributes.x = view_allocation.x;
697 attributes.y = view_allocation.y;
698 attributes.width = view_allocation.width;
699 attributes.height = view_allocation.height;
700 attributes.event_mask = 0;
702 priv->view_window = gdk_window_new (window,
703 &attributes, attributes_mask);
704 gdk_window_set_user_data (priv->view_window, viewport);
706 attributes.x = - gtk_adjustment_get_value (hadjustment);
707 attributes.y = - gtk_adjustment_get_value (vadjustment);
708 attributes.width = gtk_adjustment_get_upper (hadjustment);
709 attributes.height = gtk_adjustment_get_upper (vadjustment);
711 attributes.event_mask = event_mask;
713 priv->bin_window = gdk_window_new (priv->view_window, &attributes, attributes_mask);
714 gdk_window_set_user_data (priv->bin_window, viewport);
716 child = gtk_bin_get_child (bin);
718 gtk_widget_set_parent_window (child, priv->bin_window);
720 context = gtk_widget_get_style_context (widget);
721 gtk_style_context_set_background (context, window);
722 gtk_style_context_set_background (context, priv->bin_window);
724 gdk_window_show (priv->bin_window);
725 gdk_window_show (priv->view_window);
729 gtk_viewport_unrealize (GtkWidget *widget)
731 GtkViewport *viewport = GTK_VIEWPORT (widget);
732 GtkViewportPrivate *priv = viewport->priv;
734 gdk_window_set_user_data (priv->view_window, NULL);
735 gdk_window_destroy (priv->view_window);
736 priv->view_window = NULL;
738 gdk_window_set_user_data (priv->bin_window, NULL);
739 gdk_window_destroy (priv->bin_window);
740 priv->bin_window = NULL;
742 GTK_WIDGET_CLASS (gtk_viewport_parent_class)->unrealize (widget);
746 gtk_viewport_draw (GtkWidget *widget,
749 GtkViewport *viewport = GTK_VIEWPORT (widget);
750 GtkViewportPrivate *priv = viewport->priv;
751 GtkStyleContext *context;
754 context = gtk_widget_get_style_context (widget);
756 if (gtk_cairo_should_draw_window (cr, gtk_widget_get_window (widget)) &&
757 priv->shadow_type != GTK_SHADOW_NONE)
759 gtk_style_context_save (context);
760 gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
762 gtk_render_frame (context, cr, 0, 0,
763 gdk_window_get_width (gtk_widget_get_window (widget)),
764 gdk_window_get_height (gtk_widget_get_window (widget)));
766 gtk_style_context_restore (context);
769 if (gtk_cairo_should_draw_window (cr, priv->view_window))
771 /* This is a cute hack to ensure the contents of bin_window are
772 * restricted to where they are visible. We only need to do this
773 * clipping when called via gtk_widget_draw() and not in expose
774 * events. And when that happens every window (including this one)
777 gdk_window_get_position (priv->view_window, &x, &y);
778 cairo_rectangle (cr, x, y,
779 gdk_window_get_width (priv->view_window),
780 gdk_window_get_height (priv->view_window));
784 if (gtk_cairo_should_draw_window (cr, priv->bin_window))
786 gdk_window_get_position (priv->bin_window, &x, &y);
787 gtk_render_background (context, cr, x, y,
788 gdk_window_get_width (priv->bin_window),
789 gdk_window_get_height (priv->bin_window));
791 GTK_WIDGET_CLASS (gtk_viewport_parent_class)->draw (widget, cr);
798 gtk_viewport_add (GtkContainer *container,
801 GtkBin *bin = GTK_BIN (container);
802 GtkViewport *viewport = GTK_VIEWPORT (bin);
803 GtkViewportPrivate *priv = viewport->priv;
805 g_return_if_fail (gtk_bin_get_child (bin) == NULL);
807 gtk_widget_set_parent_window (child, priv->bin_window);
809 GTK_CONTAINER_CLASS (gtk_viewport_parent_class)->add (container, child);
813 gtk_viewport_size_allocate (GtkWidget *widget,
814 GtkAllocation *allocation)
816 GtkAllocation widget_allocation;
817 GtkViewport *viewport = GTK_VIEWPORT (widget);
818 GtkViewportPrivate *priv = viewport->priv;
819 GtkBin *bin = GTK_BIN (widget);
821 GtkAdjustment *hadjustment = priv->hadjustment;
822 GtkAdjustment *vadjustment = priv->vadjustment;
823 GtkAllocation child_allocation;
826 border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
828 /* If our size changed, and we have a shadow, queue a redraw on widget->window to
829 * redraw the shadow correctly.
831 gtk_widget_get_allocation (widget, &widget_allocation);
832 if (gtk_widget_get_mapped (widget) &&
833 priv->shadow_type != GTK_SHADOW_NONE &&
834 (widget_allocation.width != allocation->width ||
835 widget_allocation.height != allocation->height))
836 gdk_window_invalidate_rect (gtk_widget_get_window (widget), NULL, FALSE);
838 gtk_widget_set_allocation (widget, allocation);
840 g_object_freeze_notify (G_OBJECT (hadjustment));
841 g_object_freeze_notify (G_OBJECT (vadjustment));
843 viewport_set_hadjustment_values (viewport);
844 viewport_set_vadjustment_values (viewport);
846 child_allocation.x = 0;
847 child_allocation.y = 0;
848 child_allocation.width = gtk_adjustment_get_upper (hadjustment);
849 child_allocation.height = gtk_adjustment_get_upper (vadjustment);
850 if (gtk_widget_get_realized (widget))
852 GtkAllocation view_allocation;
854 gdk_window_move_resize (gtk_widget_get_window (widget),
855 allocation->x + border_width,
856 allocation->y + border_width,
857 allocation->width - border_width * 2,
858 allocation->height - border_width * 2);
860 viewport_get_view_allocation (viewport, &view_allocation);
861 gdk_window_move_resize (priv->view_window,
864 view_allocation.width,
865 view_allocation.height);
866 gdk_window_move_resize (priv->bin_window,
867 - gtk_adjustment_get_value (hadjustment),
868 - gtk_adjustment_get_value (vadjustment),
869 child_allocation.width,
870 child_allocation.height);
873 child = gtk_bin_get_child (bin);
874 if (child && gtk_widget_get_visible (child))
875 gtk_widget_size_allocate (child, &child_allocation);
877 g_object_thaw_notify (G_OBJECT (hadjustment));
878 g_object_thaw_notify (G_OBJECT (vadjustment));
882 gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment,
885 GtkViewport *viewport = GTK_VIEWPORT (data);
886 GtkViewportPrivate *priv = viewport->priv;
887 GtkBin *bin = GTK_BIN (data);
890 child = gtk_bin_get_child (bin);
891 if (child && gtk_widget_get_visible (child) &&
892 gtk_widget_get_realized (GTK_WIDGET (viewport)))
894 GtkAdjustment *hadjustment = priv->hadjustment;
895 GtkAdjustment *vadjustment = priv->vadjustment;
899 gdk_window_get_position (priv->bin_window, &old_x, &old_y);
900 new_x = - gtk_adjustment_get_value (hadjustment);
901 new_y = - gtk_adjustment_get_value (vadjustment);
903 if (new_x != old_x || new_y != old_y)
904 gdk_window_move (priv->bin_window, new_x, new_y);
909 gtk_viewport_style_updated (GtkWidget *widget)
911 GTK_WIDGET_CLASS (gtk_viewport_parent_class)->style_updated (widget);
913 if (gtk_widget_get_realized (widget) &&
914 gtk_widget_get_has_window (widget))
916 GtkStyleContext *context;
917 GtkViewport *viewport = GTK_VIEWPORT (widget);
918 GtkViewportPrivate *priv = viewport->priv;
920 context = gtk_widget_get_style_context (widget);
921 gtk_style_context_set_background (context, priv->bin_window);
922 gtk_style_context_set_background (context, gtk_widget_get_window (widget));
928 gtk_viewport_get_preferred_size (GtkWidget *widget,
929 GtkOrientation orientation,
933 GtkViewport *viewport = GTK_VIEWPORT (widget);
934 GtkViewportPrivate *priv = viewport->priv;
935 GtkStyleContext *context;
937 GtkBorder padding, border;
939 gint child_min, child_nat;
940 gint minimum, natural;
942 child = gtk_bin_get_child (GTK_BIN (widget));
944 /* XXX This should probably be (border_width * 2); but GTK+ has
945 * been doing this with a single border for a while now...
947 minimum = gtk_container_get_border_width (GTK_CONTAINER (widget));
949 context = gtk_widget_get_style_context (GTK_WIDGET (widget));
950 state = gtk_widget_get_state_flags (GTK_WIDGET (widget));
951 gtk_style_context_get_padding (context, state, &padding);
953 if (priv->shadow_type != GTK_SHADOW_NONE)
955 gtk_style_context_get_border (context, state, &border);
957 if (orientation == GTK_ORIENTATION_HORIZONTAL)
958 minimum += border.left + border.right;
960 minimum += border.top + border.bottom;
963 if (orientation == GTK_ORIENTATION_HORIZONTAL)
964 minimum += padding.left + padding.right;
966 minimum += padding.top + padding.bottom;
970 if (child && gtk_widget_get_visible (child))
972 if (orientation == GTK_ORIENTATION_HORIZONTAL)
973 gtk_widget_get_preferred_width (child, &child_min, &child_nat);
975 gtk_widget_get_preferred_height (child, &child_min, &child_nat);
977 minimum += child_min;
978 natural += child_nat;
982 *minimum_size = minimum;
985 *natural_size = natural;
989 gtk_viewport_get_preferred_width (GtkWidget *widget,
993 gtk_viewport_get_preferred_size (widget, GTK_ORIENTATION_HORIZONTAL, minimum_size, natural_size);
997 gtk_viewport_get_preferred_height (GtkWidget *widget,
1001 gtk_viewport_get_preferred_size (widget, GTK_ORIENTATION_VERTICAL, minimum_size, natural_size);