forked from AuroraMiddleware/gtk
805 lines
26 KiB
C
805 lines
26 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include "gtkviewport.h"
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#include "gtkadjustment.h"
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#include "gtkcsscustomgadgetprivate.h"
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#include "gtkintl.h"
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#include "gtkmarshalers.h"
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#include "gtkprivate.h"
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#include "gtkscrollable.h"
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#include "gtkrenderbackgroundprivate.h"
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#include "gtkstylecontextprivate.h"
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#include "gtktypebuiltins.h"
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#include "gtkwidgetprivate.h"
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/**
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* SECTION:gtkviewport
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* @Short_description: An adapter which makes widgets scrollable
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* @Title: GtkViewport
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* @See_also:#GtkScrolledWindow, #GtkAdjustment
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*
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* The #GtkViewport widget acts as an adaptor class, implementing
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* scrollability for child widgets that lack their own scrolling
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* capabilities. Use GtkViewport to scroll child widgets such as
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* #GtkGrid, #GtkBox, and so on.
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*
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* If a widget has native scrolling abilities, such as #GtkTextView,
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* #GtkTreeView or #GtkIconView, it can be added to a #GtkScrolledWindow
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* with gtk_container_add(). If a widget does not, you must first add the
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* widget to a #GtkViewport, then add the viewport to the scrolled window.
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* gtk_container_add() does this automatically if a child that does not
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* implement #GtkScrollable is added to a #GtkScrolledWindow, so you can
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* ignore the presence of the viewport.
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*
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* The GtkViewport will start scrolling content only if allocated less
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* than the child widget’s minimum size in a given orientation.
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*
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* # CSS nodes
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*
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* GtkViewport has a single CSS node with name viewport.
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*/
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struct _GtkViewportPrivate
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{
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GtkAdjustment *hadjustment;
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GtkAdjustment *vadjustment;
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GtkShadowType shadow_type;
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GdkWindow *bin_window;
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GdkWindow *view_window;
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GtkCssGadget *gadget;
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/* GtkScrollablePolicy needs to be checked when
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* driving the scrollable adjustment values */
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guint hscroll_policy : 1;
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guint vscroll_policy : 1;
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};
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enum {
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PROP_0,
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PROP_HADJUSTMENT,
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PROP_VADJUSTMENT,
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PROP_HSCROLL_POLICY,
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PROP_VSCROLL_POLICY,
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PROP_SHADOW_TYPE
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};
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static void gtk_viewport_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gtk_viewport_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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static void gtk_viewport_finalize (GObject *object);
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static void gtk_viewport_destroy (GtkWidget *widget);
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static void gtk_viewport_realize (GtkWidget *widget);
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static void gtk_viewport_unrealize (GtkWidget *widget);
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static gint gtk_viewport_draw (GtkWidget *widget,
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cairo_t *cr);
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static void gtk_viewport_add (GtkContainer *container,
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GtkWidget *widget);
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static void gtk_viewport_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static void gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment,
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gpointer data);
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static void viewport_set_adjustment (GtkViewport *viewport,
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GtkOrientation orientation,
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GtkAdjustment *adjustment);
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G_DEFINE_TYPE_WITH_CODE (GtkViewport, gtk_viewport, GTK_TYPE_BIN,
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G_ADD_PRIVATE (GtkViewport)
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G_IMPLEMENT_INTERFACE (GTK_TYPE_SCROLLABLE, NULL))
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static void
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gtk_viewport_measure (GtkCssGadget *gadget,
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GtkOrientation orientation,
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int for_size,
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int *minimum,
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int *natural,
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int *minimum_baseline,
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int *natural_baseline,
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gpointer data)
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{
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GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
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GtkWidget *child;
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*minimum = *natural = 0;
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child = gtk_bin_get_child (GTK_BIN (widget));
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if (child && gtk_widget_get_visible (child))
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gtk_widget_measure (child,
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orientation,
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for_size,
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minimum, natural,
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NULL, NULL);
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}
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static void
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viewport_set_hadjustment_values (GtkViewport *viewport)
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{
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GtkBin *bin = GTK_BIN (viewport);
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GtkAllocation view_allocation;
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GtkAdjustment *hadjustment = viewport->priv->hadjustment;
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GtkWidget *child;
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gdouble upper, value;
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gtk_css_gadget_get_content_allocation (viewport->priv->gadget,
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&view_allocation, NULL);
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child = gtk_bin_get_child (bin);
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if (child && gtk_widget_get_visible (child))
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{
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gint minimum_width, natural_width;
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gint scroll_height;
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if (viewport->priv->vscroll_policy == GTK_SCROLL_MINIMUM)
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gtk_widget_get_preferred_height (child, &scroll_height, NULL);
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else
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gtk_widget_get_preferred_height (child, NULL, &scroll_height);
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gtk_widget_get_preferred_width_for_height (child,
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MAX (view_allocation.height, scroll_height),
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&minimum_width,
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&natural_width);
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if (viewport->priv->hscroll_policy == GTK_SCROLL_MINIMUM)
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upper = MAX (minimum_width, view_allocation.width);
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else
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upper = MAX (natural_width, view_allocation.width);
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}
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else
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upper = view_allocation.width;
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value = gtk_adjustment_get_value (hadjustment);
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/* We clamp to the left in RTL mode */
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if (gtk_widget_get_direction (GTK_WIDGET (viewport)) == GTK_TEXT_DIR_RTL)
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{
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gdouble dist = gtk_adjustment_get_upper (hadjustment)
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- value
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- gtk_adjustment_get_page_size (hadjustment);
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value = upper - dist - view_allocation.width;
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}
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gtk_adjustment_configure (hadjustment,
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value,
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0,
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upper,
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view_allocation.width * 0.1,
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view_allocation.width * 0.9,
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view_allocation.width);
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}
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static void
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viewport_set_vadjustment_values (GtkViewport *viewport)
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{
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GtkBin *bin = GTK_BIN (viewport);
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GtkAllocation view_allocation;
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GtkAdjustment *vadjustment = viewport->priv->vadjustment;
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GtkWidget *child;
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gdouble upper;
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gtk_css_gadget_get_content_allocation (viewport->priv->gadget,
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&view_allocation, NULL);
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child = gtk_bin_get_child (bin);
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if (child && gtk_widget_get_visible (child))
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{
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gint minimum_height, natural_height;
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gint scroll_width;
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if (viewport->priv->hscroll_policy == GTK_SCROLL_MINIMUM)
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gtk_widget_get_preferred_width (child, &scroll_width, NULL);
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else
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gtk_widget_get_preferred_width (child, NULL, &scroll_width);
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gtk_widget_get_preferred_height_for_width (child,
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MAX (view_allocation.width, scroll_width),
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&minimum_height,
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&natural_height);
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if (viewport->priv->vscroll_policy == GTK_SCROLL_MINIMUM)
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upper = MAX (minimum_height, view_allocation.height);
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else
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upper = MAX (natural_height, view_allocation.height);
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}
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else
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upper = view_allocation.height;
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gtk_adjustment_configure (vadjustment,
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gtk_adjustment_get_value (vadjustment),
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0,
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upper,
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view_allocation.height * 0.1,
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view_allocation.height * 0.9,
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view_allocation.height);
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}
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static void
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gtk_viewport_allocate (GtkCssGadget *gadget,
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const GtkAllocation *allocation,
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int baseline,
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GtkAllocation *out_clip,
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gpointer data)
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{
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GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
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GtkViewport *viewport = GTK_VIEWPORT (widget);
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GtkViewportPrivate *priv = viewport->priv;
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GtkAdjustment *hadjustment = priv->hadjustment;
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GtkAdjustment *vadjustment = priv->vadjustment;
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GtkWidget *child;
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g_object_freeze_notify (G_OBJECT (hadjustment));
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g_object_freeze_notify (G_OBJECT (vadjustment));
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viewport_set_hadjustment_values (viewport);
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viewport_set_vadjustment_values (viewport);
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if (gtk_widget_get_realized (widget))
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{
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gdk_window_move_resize (priv->view_window,
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allocation->x,
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allocation->y,
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allocation->width,
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allocation->height);
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gdk_window_move_resize (priv->bin_window,
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- gtk_adjustment_get_value (hadjustment),
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- gtk_adjustment_get_value (vadjustment),
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gtk_adjustment_get_upper (hadjustment),
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gtk_adjustment_get_upper (vadjustment));
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}
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child = gtk_bin_get_child (GTK_BIN (widget));
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if (child && gtk_widget_get_visible (child))
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{
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GtkAllocation child_allocation;
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child_allocation.x = 0;
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child_allocation.y = 0;
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child_allocation.width = gtk_adjustment_get_upper (hadjustment);
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child_allocation.height = gtk_adjustment_get_upper (vadjustment);
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gtk_widget_size_allocate (child, &child_allocation);
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}
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g_object_thaw_notify (G_OBJECT (hadjustment));
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g_object_thaw_notify (G_OBJECT (vadjustment));
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}
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static gboolean
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gtk_viewport_render (GtkCssGadget *gadget,
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cairo_t *cr,
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int x,
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int y,
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int width,
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int height,
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gpointer data)
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{
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GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
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GTK_WIDGET_CLASS (gtk_viewport_parent_class)->draw (widget, cr);
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return FALSE;
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}
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static void
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gtk_viewport_measure_ (GtkWidget *widget,
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GtkOrientation orientation,
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int for_size,
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int *minimum,
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int *natural,
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int *minimum_baseline,
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int *natural_baseline)
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{
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gtk_css_gadget_get_preferred_size (GTK_VIEWPORT (widget)->priv->gadget,
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orientation,
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for_size,
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minimum, natural,
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minimum_baseline, natural_baseline);
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}
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static void
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gtk_viewport_class_init (GtkViewportClass *class)
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{
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GObjectClass *gobject_class;
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GtkWidgetClass *widget_class;
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GtkContainerClass *container_class;
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gobject_class = G_OBJECT_CLASS (class);
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widget_class = (GtkWidgetClass*) class;
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container_class = (GtkContainerClass*) class;
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gobject_class->set_property = gtk_viewport_set_property;
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gobject_class->get_property = gtk_viewport_get_property;
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gobject_class->finalize = gtk_viewport_finalize;
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widget_class->destroy = gtk_viewport_destroy;
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widget_class->realize = gtk_viewport_realize;
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widget_class->unrealize = gtk_viewport_unrealize;
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widget_class->draw = gtk_viewport_draw;
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widget_class->size_allocate = gtk_viewport_size_allocate;
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widget_class->measure = gtk_viewport_measure_;
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gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_VIEWPORT);
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container_class->add = gtk_viewport_add;
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/* GtkScrollable implementation */
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g_object_class_override_property (gobject_class, PROP_HADJUSTMENT, "hadjustment");
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g_object_class_override_property (gobject_class, PROP_VADJUSTMENT, "vadjustment");
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g_object_class_override_property (gobject_class, PROP_HSCROLL_POLICY, "hscroll-policy");
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g_object_class_override_property (gobject_class, PROP_VSCROLL_POLICY, "vscroll-policy");
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g_object_class_install_property (gobject_class,
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PROP_SHADOW_TYPE,
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g_param_spec_enum ("shadow-type",
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P_("Shadow type"),
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P_("Determines how the shadowed box around the viewport is drawn"),
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GTK_TYPE_SHADOW_TYPE,
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GTK_SHADOW_IN,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
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gtk_widget_class_set_css_name (widget_class, "viewport");
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}
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static void
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gtk_viewport_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GtkViewport *viewport;
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viewport = GTK_VIEWPORT (object);
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switch (prop_id)
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{
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case PROP_HADJUSTMENT:
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viewport_set_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL, g_value_get_object (value));
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break;
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case PROP_VADJUSTMENT:
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viewport_set_adjustment (viewport, GTK_ORIENTATION_VERTICAL, g_value_get_object (value));
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break;
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case PROP_HSCROLL_POLICY:
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if (viewport->priv->hscroll_policy != g_value_get_enum (value))
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{
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viewport->priv->hscroll_policy = g_value_get_enum (value);
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gtk_widget_queue_resize (GTK_WIDGET (viewport));
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g_object_notify_by_pspec (object, pspec);
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}
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break;
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case PROP_VSCROLL_POLICY:
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if (viewport->priv->vscroll_policy != g_value_get_enum (value))
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{
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viewport->priv->vscroll_policy = g_value_get_enum (value);
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gtk_widget_queue_resize (GTK_WIDGET (viewport));
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g_object_notify_by_pspec (object, pspec);
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}
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break;
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case PROP_SHADOW_TYPE:
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gtk_viewport_set_shadow_type (viewport, g_value_get_enum (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gtk_viewport_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GtkViewport *viewport = GTK_VIEWPORT (object);
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GtkViewportPrivate *priv = viewport->priv;
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switch (prop_id)
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{
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case PROP_HADJUSTMENT:
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g_value_set_object (value, priv->hadjustment);
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break;
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case PROP_VADJUSTMENT:
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g_value_set_object (value, priv->vadjustment);
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break;
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case PROP_HSCROLL_POLICY:
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g_value_set_enum (value, priv->hscroll_policy);
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break;
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case PROP_VSCROLL_POLICY:
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g_value_set_enum (value, priv->vscroll_policy);
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break;
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case PROP_SHADOW_TYPE:
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g_value_set_enum (value, priv->shadow_type);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gtk_viewport_init (GtkViewport *viewport)
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{
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GtkWidget *widget;
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GtkViewportPrivate *priv;
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GtkCssNode *widget_node;
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viewport->priv = gtk_viewport_get_instance_private (viewport);
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priv = viewport->priv;
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widget = GTK_WIDGET (viewport);
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gtk_widget_set_has_window (widget, FALSE);
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gtk_widget_set_redraw_on_allocate (widget, FALSE);
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priv->shadow_type = GTK_SHADOW_IN;
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priv->view_window = NULL;
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priv->bin_window = NULL;
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priv->hadjustment = NULL;
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priv->vadjustment = NULL;
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widget_node = gtk_widget_get_css_node (widget);
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priv->gadget = gtk_css_custom_gadget_new_for_node (widget_node,
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widget,
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gtk_viewport_measure,
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gtk_viewport_allocate,
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gtk_viewport_render,
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NULL,
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NULL, NULL);
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gtk_css_gadget_add_class (priv->gadget, GTK_STYLE_CLASS_FRAME);
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viewport_set_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL, NULL);
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viewport_set_adjustment (viewport, GTK_ORIENTATION_VERTICAL, NULL);
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}
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/**
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* gtk_viewport_new:
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* @hadjustment: (allow-none): horizontal adjustment
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* @vadjustment: (allow-none): vertical adjustment
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*
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* Creates a new #GtkViewport with the given adjustments, or with default
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* adjustments if none are given.
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*
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* Returns: a new #GtkViewport
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*/
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GtkWidget*
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gtk_viewport_new (GtkAdjustment *hadjustment,
|
||
GtkAdjustment *vadjustment)
|
||
{
|
||
GtkWidget *viewport;
|
||
|
||
viewport = g_object_new (GTK_TYPE_VIEWPORT,
|
||
"hadjustment", hadjustment,
|
||
"vadjustment", vadjustment,
|
||
NULL);
|
||
|
||
return viewport;
|
||
}
|
||
|
||
#define ADJUSTMENT_POINTER(viewport, orientation) \
|
||
(((orientation) == GTK_ORIENTATION_HORIZONTAL) ? \
|
||
&(viewport)->priv->hadjustment : &(viewport)->priv->vadjustment)
|
||
|
||
static void
|
||
viewport_disconnect_adjustment (GtkViewport *viewport,
|
||
GtkOrientation orientation)
|
||
{
|
||
GtkAdjustment **adjustmentp = ADJUSTMENT_POINTER (viewport, orientation);
|
||
|
||
if (*adjustmentp)
|
||
{
|
||
g_signal_handlers_disconnect_by_func (*adjustmentp,
|
||
gtk_viewport_adjustment_value_changed,
|
||
viewport);
|
||
g_object_unref (*adjustmentp);
|
||
*adjustmentp = NULL;
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_viewport_destroy (GtkWidget *widget)
|
||
{
|
||
GtkViewport *viewport = GTK_VIEWPORT (widget);
|
||
|
||
viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL);
|
||
viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_VERTICAL);
|
||
|
||
GTK_WIDGET_CLASS (gtk_viewport_parent_class)->destroy (widget);
|
||
}
|
||
|
||
static void
|
||
gtk_viewport_finalize (GObject *object)
|
||
{
|
||
GtkViewport *viewport = GTK_VIEWPORT (object);
|
||
GtkViewportPrivate *priv = viewport->priv;
|
||
|
||
g_clear_object (&priv->gadget);
|
||
|
||
G_OBJECT_CLASS (gtk_viewport_parent_class)->finalize (object);
|
||
}
|
||
|
||
static void
|
||
viewport_set_adjustment (GtkViewport *viewport,
|
||
GtkOrientation orientation,
|
||
GtkAdjustment *adjustment)
|
||
{
|
||
GtkAdjustment **adjustmentp = ADJUSTMENT_POINTER (viewport, orientation);
|
||
|
||
if (adjustment && adjustment == *adjustmentp)
|
||
return;
|
||
|
||
if (!adjustment)
|
||
adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
|
||
viewport_disconnect_adjustment (viewport, orientation);
|
||
*adjustmentp = adjustment;
|
||
g_object_ref_sink (adjustment);
|
||
|
||
if (orientation == GTK_ORIENTATION_HORIZONTAL)
|
||
viewport_set_hadjustment_values (viewport);
|
||
else
|
||
viewport_set_vadjustment_values (viewport);
|
||
|
||
g_signal_connect (adjustment, "value-changed",
|
||
G_CALLBACK (gtk_viewport_adjustment_value_changed),
|
||
viewport);
|
||
|
||
gtk_viewport_adjustment_value_changed (adjustment, viewport);
|
||
}
|
||
|
||
/**
|
||
* gtk_viewport_set_shadow_type:
|
||
* @viewport: a #GtkViewport.
|
||
* @type: the new shadow type.
|
||
*
|
||
* Sets the shadow type of the viewport.
|
||
**/
|
||
void
|
||
gtk_viewport_set_shadow_type (GtkViewport *viewport,
|
||
GtkShadowType type)
|
||
{
|
||
GtkViewportPrivate *priv;
|
||
GtkWidget *widget;
|
||
GtkStyleContext *context;
|
||
|
||
g_return_if_fail (GTK_IS_VIEWPORT (viewport));
|
||
|
||
widget = GTK_WIDGET (viewport);
|
||
priv = viewport->priv;
|
||
|
||
if ((GtkShadowType) priv->shadow_type != type)
|
||
{
|
||
priv->shadow_type = type;
|
||
|
||
context = gtk_widget_get_style_context (widget);
|
||
if (type != GTK_SHADOW_NONE)
|
||
gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
|
||
else
|
||
gtk_style_context_remove_class (context, GTK_STYLE_CLASS_FRAME);
|
||
|
||
gtk_widget_queue_resize (widget);
|
||
|
||
g_object_notify (G_OBJECT (viewport), "shadow-type");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_viewport_get_shadow_type:
|
||
* @viewport: a #GtkViewport
|
||
*
|
||
* Gets the shadow type of the #GtkViewport. See
|
||
* gtk_viewport_set_shadow_type().
|
||
*
|
||
* Returns: the shadow type
|
||
**/
|
||
GtkShadowType
|
||
gtk_viewport_get_shadow_type (GtkViewport *viewport)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), GTK_SHADOW_NONE);
|
||
|
||
return viewport->priv->shadow_type;
|
||
}
|
||
|
||
/**
|
||
* gtk_viewport_get_bin_window:
|
||
* @viewport: a #GtkViewport
|
||
*
|
||
* Gets the bin window of the #GtkViewport.
|
||
*
|
||
* Returns: (transfer none): a #GdkWindow
|
||
*
|
||
* Since: 2.20
|
||
**/
|
||
GdkWindow*
|
||
gtk_viewport_get_bin_window (GtkViewport *viewport)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
|
||
|
||
return viewport->priv->bin_window;
|
||
}
|
||
|
||
/**
|
||
* gtk_viewport_get_view_window:
|
||
* @viewport: a #GtkViewport
|
||
*
|
||
* Gets the view window of the #GtkViewport.
|
||
*
|
||
* Returns: (transfer none): a #GdkWindow
|
||
*
|
||
* Since: 2.22
|
||
**/
|
||
GdkWindow*
|
||
gtk_viewport_get_view_window (GtkViewport *viewport)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
|
||
|
||
return viewport->priv->view_window;
|
||
}
|
||
|
||
static void
|
||
gtk_viewport_realize (GtkWidget *widget)
|
||
{
|
||
GtkViewport *viewport = GTK_VIEWPORT (widget);
|
||
GtkViewportPrivate *priv = viewport->priv;
|
||
GtkBin *bin = GTK_BIN (widget);
|
||
GtkAdjustment *hadjustment = priv->hadjustment;
|
||
GtkAdjustment *vadjustment = priv->vadjustment;
|
||
GtkAllocation view_allocation;
|
||
GtkWidget *child;
|
||
gint event_mask;
|
||
|
||
GTK_WIDGET_CLASS (gtk_viewport_parent_class)->realize (widget);
|
||
|
||
event_mask = gtk_widget_get_events (widget);
|
||
gtk_css_gadget_get_content_allocation (priv->gadget,
|
||
&view_allocation, NULL);
|
||
|
||
priv->view_window = gdk_window_new_child (gtk_widget_get_window (widget),
|
||
event_mask | GDK_SCROLL_MASK | GDK_TOUCH_MASK | GDK_SMOOTH_SCROLL_MASK,
|
||
&view_allocation);
|
||
gtk_widget_register_window (widget, priv->view_window);
|
||
|
||
priv->bin_window = gdk_window_new_child (priv->view_window,
|
||
event_mask,
|
||
&(GdkRectangle) {
|
||
- gtk_adjustment_get_value (hadjustment),
|
||
- gtk_adjustment_get_value (vadjustment),
|
||
gtk_adjustment_get_upper (hadjustment),
|
||
gtk_adjustment_get_upper (vadjustment)});
|
||
gtk_widget_register_window (widget, priv->bin_window);
|
||
|
||
child = gtk_bin_get_child (bin);
|
||
if (child)
|
||
gtk_widget_set_parent_window (child, priv->bin_window);
|
||
|
||
gdk_window_show (priv->bin_window);
|
||
gdk_window_show (priv->view_window);
|
||
}
|
||
|
||
static void
|
||
gtk_viewport_unrealize (GtkWidget *widget)
|
||
{
|
||
GtkViewport *viewport = GTK_VIEWPORT (widget);
|
||
GtkViewportPrivate *priv = viewport->priv;
|
||
|
||
gtk_widget_unregister_window (widget, priv->view_window);
|
||
gdk_window_destroy (priv->view_window);
|
||
priv->view_window = NULL;
|
||
|
||
gtk_widget_unregister_window (widget, priv->bin_window);
|
||
gdk_window_destroy (priv->bin_window);
|
||
priv->bin_window = NULL;
|
||
|
||
GTK_WIDGET_CLASS (gtk_viewport_parent_class)->unrealize (widget);
|
||
}
|
||
|
||
static gint
|
||
gtk_viewport_draw (GtkWidget *widget,
|
||
cairo_t *cr)
|
||
{
|
||
GtkViewport *viewport = GTK_VIEWPORT (widget);
|
||
GtkViewportPrivate *priv = viewport->priv;
|
||
|
||
gtk_css_gadget_draw (priv->gadget, cr);
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
static void
|
||
gtk_viewport_add (GtkContainer *container,
|
||
GtkWidget *child)
|
||
{
|
||
GtkBin *bin = GTK_BIN (container);
|
||
GtkViewport *viewport = GTK_VIEWPORT (bin);
|
||
GtkViewportPrivate *priv = viewport->priv;
|
||
|
||
g_return_if_fail (gtk_bin_get_child (bin) == NULL);
|
||
|
||
gtk_widget_set_parent_window (child, priv->bin_window);
|
||
|
||
GTK_CONTAINER_CLASS (gtk_viewport_parent_class)->add (container, child);
|
||
}
|
||
|
||
static void
|
||
gtk_viewport_size_allocate (GtkWidget *widget,
|
||
GtkAllocation *allocation)
|
||
{
|
||
GtkViewport *viewport = GTK_VIEWPORT (widget);
|
||
GtkViewportPrivate *priv = viewport->priv;
|
||
GtkAllocation clip, content_allocation, widget_allocation;
|
||
|
||
/* If our size changed, and we have a shadow, queue a redraw on widget->window to
|
||
* redraw the shadow correctly.
|
||
*/
|
||
gtk_widget_get_allocation (widget, &widget_allocation);
|
||
if (gtk_widget_get_mapped (widget) &&
|
||
priv->shadow_type != GTK_SHADOW_NONE &&
|
||
(widget_allocation.width != allocation->width ||
|
||
widget_allocation.height != allocation->height))
|
||
gdk_window_invalidate_rect (gtk_widget_get_window (widget), NULL, FALSE);
|
||
|
||
gtk_widget_set_allocation (widget, allocation);
|
||
|
||
content_allocation = *allocation;
|
||
gtk_css_gadget_allocate (priv->gadget,
|
||
&content_allocation,
|
||
gtk_widget_get_allocated_baseline (widget),
|
||
&clip);
|
||
|
||
gtk_widget_set_clip (widget, &clip);
|
||
}
|
||
|
||
static void
|
||
gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment,
|
||
gpointer data)
|
||
{
|
||
GtkViewport *viewport = GTK_VIEWPORT (data);
|
||
GtkViewportPrivate *priv = viewport->priv;
|
||
GtkBin *bin = GTK_BIN (data);
|
||
GtkWidget *child;
|
||
|
||
child = gtk_bin_get_child (bin);
|
||
if (child && gtk_widget_get_visible (child) &&
|
||
gtk_widget_get_realized (GTK_WIDGET (viewport)))
|
||
{
|
||
GtkAdjustment *hadjustment = priv->hadjustment;
|
||
GtkAdjustment *vadjustment = priv->vadjustment;
|
||
gint old_x, old_y;
|
||
gint new_x, new_y;
|
||
|
||
gdk_window_get_position (priv->bin_window, &old_x, &old_y);
|
||
new_x = - gtk_adjustment_get_value (hadjustment);
|
||
new_y = - gtk_adjustment_get_value (vadjustment);
|
||
|
||
if (new_x != old_x || new_y != old_y)
|
||
gdk_window_move (priv->bin_window, new_x, new_y);
|
||
}
|
||
}
|