forked from AuroraMiddleware/gtk
1113 lines
35 KiB
C
1113 lines
35 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 "gtkintl.h"
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#include "gtkmarshalers.h"
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#include "gtkpixelcacheprivate.h"
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#include "gtkprivate.h"
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#include "gtkscrollable.h"
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#include "gtkrender.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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GtkPixelCache *pixel_cache;
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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_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 void gtk_viewport_map (GtkWidget *widget);
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static void gtk_viewport_unmap (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 gtk_viewport_get_preferred_width (GtkWidget *widget,
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gint *minimum_size,
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gint *natural_size);
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static void gtk_viewport_get_preferred_height (GtkWidget *widget,
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gint *minimum_size,
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gint *natural_size);
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static void gtk_viewport_get_preferred_width_for_height (GtkWidget *widget,
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gint height,
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gint *minimum_size,
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gint *natural_size);
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static void gtk_viewport_get_preferred_height_for_width (GtkWidget *widget,
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gint width,
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gint *minimum_size,
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gint *natural_size);
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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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static void gtk_viewport_queue_draw_region (GtkWidget *widget,
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const cairo_region_t *region);
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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_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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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->map = gtk_viewport_map;
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widget_class->unmap = gtk_viewport_unmap;
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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->get_preferred_width = gtk_viewport_get_preferred_width;
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widget_class->get_preferred_height = gtk_viewport_get_preferred_height;
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widget_class->get_preferred_width_for_height = gtk_viewport_get_preferred_width_for_height;
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widget_class->get_preferred_height_for_width = gtk_viewport_get_preferred_height_for_width;
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widget_class->queue_draw_region = gtk_viewport_queue_draw_region;
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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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GtkViewportPrivate *priv;
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GtkStyleContext *style_context;
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viewport->priv = gtk_viewport_get_instance_private (viewport);
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priv = viewport->priv;
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gtk_widget_set_has_window (GTK_WIDGET (viewport), TRUE);
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gtk_widget_set_redraw_on_allocate (GTK_WIDGET (viewport), 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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priv->pixel_cache = _gtk_pixel_cache_new ();
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style_context = gtk_widget_get_style_context (GTK_WIDGET (viewport));
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_gtk_pixel_cache_set_style_context (priv->pixel_cache, style_context);
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gtk_style_context_add_class (gtk_widget_get_style_context (GTK_WIDGET (viewport)), 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,
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GtkAdjustment *vadjustment)
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{
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GtkWidget *viewport;
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viewport = g_object_new (GTK_TYPE_VIEWPORT,
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"hadjustment", hadjustment,
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"vadjustment", vadjustment,
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NULL);
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return viewport;
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}
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#define ADJUSTMENT_POINTER(viewport, orientation) \
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(((orientation) == GTK_ORIENTATION_HORIZONTAL) ? \
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&(viewport)->priv->hadjustment : &(viewport)->priv->vadjustment)
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static void
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viewport_disconnect_adjustment (GtkViewport *viewport,
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GtkOrientation orientation)
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{
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GtkAdjustment **adjustmentp = ADJUSTMENT_POINTER (viewport, orientation);
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if (*adjustmentp)
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{
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g_signal_handlers_disconnect_by_func (*adjustmentp,
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gtk_viewport_adjustment_value_changed,
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viewport);
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g_object_unref (*adjustmentp);
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*adjustmentp = NULL;
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}
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}
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static void
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gtk_viewport_destroy (GtkWidget *widget)
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{
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GtkViewport *viewport = GTK_VIEWPORT (widget);
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GtkViewportPrivate *priv = viewport->priv;
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viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL);
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viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_VERTICAL);
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if (priv->pixel_cache)
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_gtk_pixel_cache_free (priv->pixel_cache);
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priv->pixel_cache = NULL;
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GTK_WIDGET_CLASS (gtk_viewport_parent_class)->destroy (widget);
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}
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static void
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viewport_get_view_allocation (GtkViewport *viewport,
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GtkAllocation *view_allocation)
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{
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GtkViewportPrivate *priv = viewport->priv;
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GtkWidget *widget = GTK_WIDGET (viewport);
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GtkAllocation allocation;
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GtkStyleContext *context;
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GtkStateFlags state;
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GtkBorder padding, border;
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gint border_width;
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gtk_widget_get_allocation (widget, &allocation);
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border_width = gtk_container_get_border_width (GTK_CONTAINER (viewport));
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view_allocation->x = 0;
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view_allocation->y = 0;
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context = gtk_widget_get_style_context (widget);
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state = gtk_widget_get_state_flags (widget);
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gtk_style_context_get_padding (context, state, &padding);
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gtk_style_context_get_border (context, state, &border);
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if (priv->shadow_type != GTK_SHADOW_NONE)
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{
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view_allocation->x = border.left;
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view_allocation->y = border.top;
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}
|
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view_allocation->x += padding.left;
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view_allocation->y += padding.top;
|
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view_allocation->width = MAX (1, allocation.width - padding.left - padding.right - border_width * 2);
|
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view_allocation->height = MAX (1, allocation.height - padding.top - padding.bottom - border_width * 2);
|
||
|
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if (priv->shadow_type != GTK_SHADOW_NONE)
|
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{
|
||
view_allocation->width = MAX (1, view_allocation->width - border.left - border.right);
|
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view_allocation->height = MAX (1, view_allocation->height - border.top - border.bottom);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_viewport_get_hadjustment:
|
||
* @viewport: a #GtkViewport.
|
||
*
|
||
* Returns the horizontal adjustment of the viewport.
|
||
*
|
||
* Returns: (transfer none): the horizontal adjustment of @viewport.
|
||
*
|
||
* Deprecated: 3.0: Use gtk_scrollable_get_hadjustment()
|
||
**/
|
||
GtkAdjustment*
|
||
gtk_viewport_get_hadjustment (GtkViewport *viewport)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
|
||
|
||
return viewport->priv->hadjustment;
|
||
}
|
||
|
||
/**
|
||
* gtk_viewport_get_vadjustment:
|
||
* @viewport: a #GtkViewport.
|
||
*
|
||
* Returns the vertical adjustment of the viewport.
|
||
*
|
||
* Returns: (transfer none): the vertical adjustment of @viewport.
|
||
*
|
||
* Deprecated: 3.0: Use gtk_scrollable_get_vadjustment()
|
||
**/
|
||
GtkAdjustment*
|
||
gtk_viewport_get_vadjustment (GtkViewport *viewport)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
|
||
|
||
return viewport->priv->vadjustment;
|
||
}
|
||
|
||
static void
|
||
viewport_set_hadjustment_values (GtkViewport *viewport)
|
||
{
|
||
GtkBin *bin = GTK_BIN (viewport);
|
||
GtkAllocation view_allocation;
|
||
GtkAdjustment *hadjustment = viewport->priv->hadjustment;
|
||
GtkWidget *child;
|
||
gdouble upper, value;
|
||
|
||
viewport_get_view_allocation (viewport, &view_allocation);
|
||
|
||
child = gtk_bin_get_child (bin);
|
||
if (child && gtk_widget_get_visible (child))
|
||
{
|
||
gint minimum_width, natural_width;
|
||
gint scroll_height;
|
||
|
||
if (viewport->priv->vscroll_policy == GTK_SCROLL_MINIMUM)
|
||
gtk_widget_get_preferred_height (child, &scroll_height, NULL);
|
||
else
|
||
gtk_widget_get_preferred_height (child, NULL, &scroll_height);
|
||
|
||
gtk_widget_get_preferred_width_for_height (child,
|
||
MAX (view_allocation.height, scroll_height),
|
||
&minimum_width,
|
||
&natural_width);
|
||
|
||
if (viewport->priv->hscroll_policy == GTK_SCROLL_MINIMUM)
|
||
upper = MAX (minimum_width, view_allocation.width);
|
||
else
|
||
upper = MAX (natural_width, view_allocation.width);
|
||
}
|
||
else
|
||
upper = view_allocation.width;
|
||
|
||
value = gtk_adjustment_get_value (hadjustment);
|
||
/* We clamp to the left in RTL mode */
|
||
if (gtk_widget_get_direction (GTK_WIDGET (viewport)) == GTK_TEXT_DIR_RTL)
|
||
{
|
||
gdouble dist = gtk_adjustment_get_upper (hadjustment)
|
||
- value
|
||
- gtk_adjustment_get_page_size (hadjustment);
|
||
value = upper - dist - view_allocation.width;
|
||
}
|
||
|
||
gtk_adjustment_configure (hadjustment,
|
||
value,
|
||
0,
|
||
upper,
|
||
view_allocation.width * 0.1,
|
||
view_allocation.width * 0.9,
|
||
view_allocation.width);
|
||
}
|
||
|
||
static void
|
||
viewport_set_vadjustment_values (GtkViewport *viewport)
|
||
{
|
||
GtkBin *bin = GTK_BIN (viewport);
|
||
GtkAllocation view_allocation;
|
||
GtkAdjustment *vadjustment = viewport->priv->vadjustment;
|
||
GtkWidget *child;
|
||
gdouble upper;
|
||
|
||
viewport_get_view_allocation (viewport, &view_allocation);
|
||
|
||
child = gtk_bin_get_child (bin);
|
||
if (child && gtk_widget_get_visible (child))
|
||
{
|
||
gint minimum_height, natural_height;
|
||
gint scroll_width;
|
||
|
||
if (viewport->priv->hscroll_policy == GTK_SCROLL_MINIMUM)
|
||
gtk_widget_get_preferred_width (child, &scroll_width, NULL);
|
||
else
|
||
gtk_widget_get_preferred_width (child, NULL, &scroll_width);
|
||
|
||
gtk_widget_get_preferred_height_for_width (child,
|
||
MAX (view_allocation.width, scroll_width),
|
||
&minimum_height,
|
||
&natural_height);
|
||
|
||
if (viewport->priv->vscroll_policy == GTK_SCROLL_MINIMUM)
|
||
upper = MAX (minimum_height, view_allocation.height);
|
||
else
|
||
upper = MAX (natural_height, view_allocation.height);
|
||
}
|
||
else
|
||
upper = view_allocation.height;
|
||
|
||
gtk_adjustment_configure (vadjustment,
|
||
gtk_adjustment_get_value (vadjustment),
|
||
0,
|
||
upper,
|
||
view_allocation.height * 0.1,
|
||
view_allocation.height * 0.9,
|
||
view_allocation.height);
|
||
}
|
||
|
||
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_hadjustment:
|
||
* @viewport: a #GtkViewport.
|
||
* @adjustment: (allow-none): a #GtkAdjustment.
|
||
*
|
||
* Sets the horizontal adjustment of the viewport.
|
||
*
|
||
* Deprecated: 3.0: Use gtk_scrollable_set_hadjustment()
|
||
**/
|
||
void
|
||
gtk_viewport_set_hadjustment (GtkViewport *viewport,
|
||
GtkAdjustment *adjustment)
|
||
{
|
||
g_return_if_fail (GTK_IS_VIEWPORT (viewport));
|
||
if (adjustment)
|
||
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
|
||
|
||
viewport_set_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL, adjustment);
|
||
|
||
g_object_notify (G_OBJECT (viewport), "hadjustment");
|
||
}
|
||
|
||
/**
|
||
* gtk_viewport_set_vadjustment:
|
||
* @viewport: a #GtkViewport.
|
||
* @adjustment: (allow-none): a #GtkAdjustment.
|
||
*
|
||
* Sets the vertical adjustment of the viewport.
|
||
*
|
||
* Deprecated: 3.0: Use gtk_scrollable_set_vadjustment()
|
||
**/
|
||
void
|
||
gtk_viewport_set_vadjustment (GtkViewport *viewport,
|
||
GtkAdjustment *adjustment)
|
||
{
|
||
g_return_if_fail (GTK_IS_VIEWPORT (viewport));
|
||
if (adjustment)
|
||
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
|
||
|
||
viewport_set_adjustment (viewport, GTK_ORIENTATION_VERTICAL, adjustment);
|
||
|
||
g_object_notify (G_OBJECT (viewport), "vadjustment");
|
||
}
|
||
|
||
/**
|
||
* 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_bin_window_invalidate_handler (GdkWindow *window,
|
||
cairo_region_t *region)
|
||
{
|
||
gpointer widget;
|
||
GtkViewport *viewport;
|
||
GtkViewportPrivate *priv;
|
||
|
||
gdk_window_get_user_data (window, &widget);
|
||
viewport = GTK_VIEWPORT (widget);
|
||
priv = viewport->priv;
|
||
|
||
_gtk_pixel_cache_invalidate (priv->pixel_cache, region);
|
||
}
|
||
|
||
static void
|
||
gtk_viewport_queue_draw_region (GtkWidget *widget,
|
||
const cairo_region_t *region)
|
||
{
|
||
GtkViewport *viewport = GTK_VIEWPORT (widget);
|
||
GtkViewportPrivate *priv = viewport->priv;
|
||
|
||
/* There is no way we can know if a region targets the
|
||
not-currently-visible but in pixel cache region, so we
|
||
always just invalidate the whole thing whenever the
|
||
tree view gets a queue draw. This doesn't normally happen
|
||
in normal scrolling cases anyway. */
|
||
_gtk_pixel_cache_invalidate (priv->pixel_cache, NULL);
|
||
|
||
GTK_WIDGET_CLASS (gtk_viewport_parent_class)->queue_draw_region (widget,
|
||
region);
|
||
}
|
||
|
||
|
||
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 allocation;
|
||
GtkAllocation view_allocation;
|
||
GtkWidget *child;
|
||
GdkWindow *window;
|
||
GdkWindowAttr attributes;
|
||
gint attributes_mask;
|
||
gint event_mask;
|
||
guint border_width;
|
||
|
||
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
|
||
|
||
gtk_widget_set_realized (widget, TRUE);
|
||
|
||
gtk_widget_get_allocation (widget, &allocation);
|
||
|
||
attributes.x = allocation.x + border_width;
|
||
attributes.y = allocation.y + border_width;
|
||
attributes.width = allocation.width - border_width * 2;
|
||
attributes.height = allocation.height - border_width * 2;
|
||
attributes.window_type = GDK_WINDOW_CHILD;
|
||
attributes.wclass = GDK_INPUT_OUTPUT;
|
||
attributes.visual = gtk_widget_get_visual (widget);
|
||
|
||
event_mask = gtk_widget_get_events (widget);
|
||
|
||
attributes.event_mask = event_mask | GDK_SCROLL_MASK | GDK_TOUCH_MASK | GDK_SMOOTH_SCROLL_MASK;
|
||
|
||
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
|
||
|
||
window = gdk_window_new (gtk_widget_get_parent_window (widget),
|
||
&attributes, attributes_mask);
|
||
gtk_widget_set_window (widget, window);
|
||
gtk_widget_register_window (widget, window);
|
||
|
||
viewport_get_view_allocation (viewport, &view_allocation);
|
||
|
||
attributes.x = view_allocation.x;
|
||
attributes.y = view_allocation.y;
|
||
attributes.width = view_allocation.width;
|
||
attributes.height = view_allocation.height;
|
||
attributes.event_mask = 0;
|
||
|
||
priv->view_window = gdk_window_new (window,
|
||
&attributes, attributes_mask);
|
||
gtk_widget_register_window (widget, priv->view_window);
|
||
|
||
attributes.x = - gtk_adjustment_get_value (hadjustment);
|
||
attributes.y = - gtk_adjustment_get_value (vadjustment);
|
||
attributes.width = gtk_adjustment_get_upper (hadjustment);
|
||
attributes.height = gtk_adjustment_get_upper (vadjustment);
|
||
|
||
attributes.event_mask = event_mask;
|
||
|
||
priv->bin_window = gdk_window_new (priv->view_window, &attributes, attributes_mask);
|
||
gtk_widget_register_window (widget, priv->bin_window);
|
||
gdk_window_set_invalidate_handler (priv->bin_window,
|
||
gtk_viewport_bin_window_invalidate_handler);
|
||
|
||
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 void
|
||
gtk_viewport_map (GtkWidget *widget)
|
||
{
|
||
GtkViewport *viewport = GTK_VIEWPORT (widget);
|
||
GtkViewportPrivate *priv = viewport->priv;
|
||
|
||
_gtk_pixel_cache_map (priv->pixel_cache);
|
||
|
||
GTK_WIDGET_CLASS (gtk_viewport_parent_class)->map (widget);
|
||
}
|
||
|
||
static void
|
||
gtk_viewport_unmap (GtkWidget *widget)
|
||
{
|
||
GtkViewport *viewport = GTK_VIEWPORT (widget);
|
||
GtkViewportPrivate *priv = viewport->priv;
|
||
|
||
GTK_WIDGET_CLASS (gtk_viewport_parent_class)->unmap (widget);
|
||
|
||
_gtk_pixel_cache_unmap (priv->pixel_cache);
|
||
}
|
||
|
||
static void
|
||
draw_bin (cairo_t *cr,
|
||
gpointer user_data)
|
||
{
|
||
GtkWidget *widget = GTK_WIDGET (user_data);
|
||
GtkViewport *viewport = GTK_VIEWPORT (widget);
|
||
GtkViewportPrivate *priv = viewport->priv;
|
||
GtkStyleContext *context;
|
||
int x, y;
|
||
|
||
context = gtk_widget_get_style_context (widget);
|
||
|
||
gdk_window_get_position (priv->bin_window, &x, &y);
|
||
gtk_render_background (context, cr, x, y,
|
||
gdk_window_get_width (priv->bin_window),
|
||
gdk_window_get_height (priv->bin_window));
|
||
GTK_WIDGET_CLASS (gtk_viewport_parent_class)->draw (widget, cr);
|
||
}
|
||
|
||
static gint
|
||
gtk_viewport_draw (GtkWidget *widget,
|
||
cairo_t *cr)
|
||
{
|
||
GtkViewport *viewport = GTK_VIEWPORT (widget);
|
||
GtkViewportPrivate *priv = viewport->priv;
|
||
GtkStyleContext *context;
|
||
|
||
context = gtk_widget_get_style_context (widget);
|
||
|
||
if (gtk_cairo_should_draw_window (cr, gtk_widget_get_window (widget)))
|
||
{
|
||
gtk_render_background (context, cr, 0, 0,
|
||
gdk_window_get_width (gtk_widget_get_window (widget)),
|
||
gdk_window_get_height (gtk_widget_get_window (widget)));
|
||
gtk_render_frame (context, cr, 0, 0,
|
||
gdk_window_get_width (gtk_widget_get_window (widget)),
|
||
gdk_window_get_height (gtk_widget_get_window (widget)));
|
||
}
|
||
|
||
if (gtk_cairo_should_draw_window (cr, priv->bin_window))
|
||
{
|
||
cairo_rectangle_int_t view_rect;
|
||
cairo_rectangle_int_t canvas_rect;
|
||
|
||
gdk_window_get_position (priv->view_window, &view_rect.x, &view_rect.y);
|
||
view_rect.width = gdk_window_get_width (priv->view_window);
|
||
view_rect.height = gdk_window_get_height (priv->view_window);
|
||
|
||
gdk_window_get_position (priv->bin_window, &canvas_rect.x, &canvas_rect.y);
|
||
canvas_rect.width = gdk_window_get_width (priv->bin_window);
|
||
canvas_rect.height = gdk_window_get_height (priv->bin_window);
|
||
|
||
_gtk_pixel_cache_draw (priv->pixel_cache, cr, priv->bin_window,
|
||
&view_rect, &canvas_rect,
|
||
draw_bin, widget);
|
||
}
|
||
|
||
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)
|
||
{
|
||
GtkAllocation widget_allocation;
|
||
GtkViewport *viewport = GTK_VIEWPORT (widget);
|
||
GtkViewportPrivate *priv = viewport->priv;
|
||
GtkBin *bin = GTK_BIN (widget);
|
||
guint border_width;
|
||
GtkAdjustment *hadjustment = priv->hadjustment;
|
||
GtkAdjustment *vadjustment = priv->vadjustment;
|
||
GtkAllocation child_allocation;
|
||
GtkWidget *child;
|
||
|
||
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
|
||
|
||
/* 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);
|
||
|
||
g_object_freeze_notify (G_OBJECT (hadjustment));
|
||
g_object_freeze_notify (G_OBJECT (vadjustment));
|
||
|
||
viewport_set_hadjustment_values (viewport);
|
||
viewport_set_vadjustment_values (viewport);
|
||
|
||
child_allocation.x = 0;
|
||
child_allocation.y = 0;
|
||
child_allocation.width = gtk_adjustment_get_upper (hadjustment);
|
||
child_allocation.height = gtk_adjustment_get_upper (vadjustment);
|
||
if (gtk_widget_get_realized (widget))
|
||
{
|
||
GtkAllocation view_allocation;
|
||
|
||
gdk_window_move_resize (gtk_widget_get_window (widget),
|
||
allocation->x + border_width,
|
||
allocation->y + border_width,
|
||
allocation->width - border_width * 2,
|
||
allocation->height - border_width * 2);
|
||
|
||
viewport_get_view_allocation (viewport, &view_allocation);
|
||
gdk_window_move_resize (priv->view_window,
|
||
view_allocation.x,
|
||
view_allocation.y,
|
||
view_allocation.width,
|
||
view_allocation.height);
|
||
gdk_window_move_resize (priv->bin_window,
|
||
- gtk_adjustment_get_value (hadjustment),
|
||
- gtk_adjustment_get_value (vadjustment),
|
||
child_allocation.width,
|
||
child_allocation.height);
|
||
}
|
||
|
||
child = gtk_bin_get_child (bin);
|
||
if (child && gtk_widget_get_visible (child))
|
||
gtk_widget_size_allocate (child, &child_allocation);
|
||
|
||
g_object_thaw_notify (G_OBJECT (hadjustment));
|
||
g_object_thaw_notify (G_OBJECT (vadjustment));
|
||
}
|
||
|
||
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);
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_viewport_get_preferred_size (GtkWidget *widget,
|
||
GtkOrientation orientation,
|
||
gint for_size,
|
||
gint *minimum_size,
|
||
gint *natural_size)
|
||
{
|
||
GtkViewport *viewport = GTK_VIEWPORT (widget);
|
||
GtkViewportPrivate *priv = viewport->priv;
|
||
GtkStyleContext *context;
|
||
GtkBorder padding, border;
|
||
GtkWidget *child;
|
||
gint child_min, child_nat;
|
||
gint minimum, natural;
|
||
|
||
child = gtk_bin_get_child (GTK_BIN (widget));
|
||
|
||
minimum = 2 * gtk_container_get_border_width (GTK_CONTAINER (widget));
|
||
|
||
context = gtk_widget_get_style_context (GTK_WIDGET (widget));
|
||
gtk_style_context_get_padding (context, gtk_style_context_get_state (context), &padding);
|
||
|
||
if (priv->shadow_type != GTK_SHADOW_NONE)
|
||
{
|
||
gtk_style_context_get_border (context, gtk_style_context_get_state (context), &border);
|
||
|
||
if (orientation == GTK_ORIENTATION_HORIZONTAL)
|
||
{
|
||
if (for_size >= 0)
|
||
for_size -= border.top + border.bottom;
|
||
minimum += border.left + border.right;
|
||
}
|
||
else
|
||
{
|
||
if (for_size >= 0)
|
||
for_size -= border.left + border.right;
|
||
minimum += border.top + border.bottom;
|
||
}
|
||
}
|
||
|
||
if (orientation == GTK_ORIENTATION_HORIZONTAL)
|
||
{
|
||
if (for_size >= 0)
|
||
for_size -= padding.top + padding.bottom;
|
||
minimum += padding.left + padding.right;
|
||
}
|
||
else
|
||
{
|
||
if (for_size >= 0)
|
||
for_size -= padding.left + padding.right;
|
||
minimum += padding.top + padding.bottom;
|
||
}
|
||
|
||
natural = minimum;
|
||
|
||
if (child && gtk_widget_get_visible (child))
|
||
{
|
||
_gtk_widget_get_preferred_size_for_size (child,
|
||
orientation,
|
||
for_size,
|
||
&child_min, &child_nat,
|
||
NULL, NULL);
|
||
|
||
minimum += child_min;
|
||
natural += child_nat;
|
||
}
|
||
|
||
*minimum_size = minimum;
|
||
*natural_size = natural;
|
||
}
|
||
|
||
static void
|
||
gtk_viewport_get_preferred_width (GtkWidget *widget,
|
||
gint *minimum_size,
|
||
gint *natural_size)
|
||
{
|
||
gtk_viewport_get_preferred_size (widget, GTK_ORIENTATION_HORIZONTAL, -1, minimum_size, natural_size);
|
||
}
|
||
|
||
static void
|
||
gtk_viewport_get_preferred_height (GtkWidget *widget,
|
||
gint *minimum_size,
|
||
gint *natural_size)
|
||
{
|
||
gtk_viewport_get_preferred_size (widget, GTK_ORIENTATION_VERTICAL, -1, minimum_size, natural_size);
|
||
}
|
||
|
||
static void
|
||
gtk_viewport_get_preferred_width_for_height (GtkWidget *widget,
|
||
gint height,
|
||
gint *minimum_size,
|
||
gint *natural_size)
|
||
{
|
||
gtk_viewport_get_preferred_size (widget, GTK_ORIENTATION_HORIZONTAL, height, minimum_size, natural_size);
|
||
}
|
||
|
||
static void
|
||
gtk_viewport_get_preferred_height_for_width (GtkWidget *widget,
|
||
gint width,
|
||
gint *minimum_size,
|
||
gint *natural_size)
|
||
{
|
||
gtk_viewport_get_preferred_size (widget, GTK_ORIENTATION_VERTICAL, width, minimum_size, natural_size);
|
||
}
|