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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gfx/gtk_preserve_window.h"
#include <gdk/gdkwindow.h>
#include <gtk/gtk.h>
#include <gtk/gtkwidget.h>
#include <gtk/gtkfixed.h>
G_BEGIN_DECLS
#define GTK_PRESERVE_WINDOW_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), \
GTK_TYPE_PRESERVE_WINDOW, \
GtkPreserveWindowPrivate))
typedef struct _GtkPreserveWindowPrivate GtkPreserveWindowPrivate;
struct _GtkPreserveWindowPrivate {
// If true, don't create/destroy windows on realize/unrealize.
gboolean preserve_window;
// Whether or not we delegate the resize of the GdkWindow
// to someone else.
gboolean delegate_resize;
};
G_DEFINE_TYPE(GtkPreserveWindow, gtk_preserve_window, GTK_TYPE_FIXED)
static void gtk_preserve_window_destroy(GtkObject* object);
static void gtk_preserve_window_realize(GtkWidget* widget);
static void gtk_preserve_window_unrealize(GtkWidget* widget);
static void gtk_preserve_window_size_allocate(GtkWidget* widget,
GtkAllocation* allocation);
static void gtk_preserve_window_class_init(GtkPreserveWindowClass *klass) {
GtkWidgetClass* widget_class = reinterpret_cast<GtkWidgetClass*>(klass);
widget_class->realize = gtk_preserve_window_realize;
widget_class->unrealize = gtk_preserve_window_unrealize;
widget_class->size_allocate = gtk_preserve_window_size_allocate;
GtkObjectClass* object_class = reinterpret_cast<GtkObjectClass*>(klass);
object_class->destroy = gtk_preserve_window_destroy;
GObjectClass* gobject_class = G_OBJECT_CLASS(klass);
g_type_class_add_private(gobject_class, sizeof(GtkPreserveWindowPrivate));
}
static void gtk_preserve_window_init(GtkPreserveWindow* widget) {
GtkPreserveWindowPrivate* priv = GTK_PRESERVE_WINDOW_GET_PRIVATE(widget);
priv->preserve_window = FALSE;
// These widgets always have their own window.
gtk_fixed_set_has_window(GTK_FIXED(widget), TRUE);
}
GtkWidget* gtk_preserve_window_new() {
return GTK_WIDGET(g_object_new(GTK_TYPE_PRESERVE_WINDOW, NULL));
}
static void gtk_preserve_window_destroy(GtkObject* object) {
GtkWidget* widget = reinterpret_cast<GtkWidget*>(object);
GtkPreserveWindowPrivate* priv = GTK_PRESERVE_WINDOW_GET_PRIVATE(widget);
if (widget->window) {
gdk_window_set_user_data(widget->window, NULL);
// If the window is preserved, someone else must destroy it.
if (!priv->preserve_window)
gdk_window_destroy(widget->window);
widget->window = NULL;
}
GTK_OBJECT_CLASS(gtk_preserve_window_parent_class)->destroy(object);
}
static void gtk_preserve_window_realize(GtkWidget* widget) {
g_return_if_fail(GTK_IS_PRESERVE_WINDOW(widget));
if (widget->window) {
gdk_window_reparent(widget->window,
gtk_widget_get_parent_window(widget),
widget->allocation.x,
widget->allocation.y);
widget->style = gtk_style_attach(widget->style, widget->window);
gtk_style_set_background(widget->style, widget->window, GTK_STATE_NORMAL);
gint event_mask = gtk_widget_get_events(widget);
event_mask |= GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK;
gdk_window_set_events(widget->window, (GdkEventMask) event_mask);
gdk_window_set_user_data(widget->window, widget);
// Deprecated as of GTK 2.22. Used for compatibility.
// It should be: gtk_widget_set_realized(widget, TRUE)
GTK_WIDGET_SET_FLAGS(widget, GTK_REALIZED);
} else {
GTK_WIDGET_CLASS(gtk_preserve_window_parent_class)->realize(widget);
}
}
static void gtk_preserve_window_unrealize(GtkWidget* widget) {
g_return_if_fail(GTK_IS_PRESERVE_WINDOW(widget));
GtkPreserveWindowPrivate* priv = GTK_PRESERVE_WINDOW_GET_PRIVATE(widget);
if (priv->preserve_window) {
GtkWidgetClass* widget_class =
GTK_WIDGET_CLASS(gtk_preserve_window_parent_class);
GtkContainerClass* container_class =
GTK_CONTAINER_CLASS(gtk_preserve_window_parent_class);
// Deprecated as of GTK 2.22. Used for compatibility.
// It should be: gtk_widget_get_mapped()
if (GTK_WIDGET_MAPPED(widget)) {
widget_class->unmap(widget);
// Deprecated as of GTK 2.22. Used for compatibility.
// It should be: gtk_widget_set_mapped(widget, FALSE)
GTK_WIDGET_UNSET_FLAGS(widget, GTK_MAPPED);
}
// This is the behavior from GtkWidget, inherited by GtkFixed.
// It is unclear why we should not call the potentially overridden
// unrealize method (via the callback), but doing so causes errors.
container_class->forall(
GTK_CONTAINER(widget), FALSE,
reinterpret_cast<GtkCallback>(gtk_widget_unrealize), NULL);
gtk_style_detach(widget->style);
gdk_window_reparent(widget->window, gdk_get_default_root_window(), 0, 0);
gtk_selection_remove_all(widget);
gdk_window_set_user_data(widget->window, NULL);
// Deprecated as of GTK 2.22. Used for compatibility.
// It should be: gtk_widget_set_realized(widget, FALSE)
GTK_WIDGET_UNSET_FLAGS(widget, GTK_REALIZED);
} else {
GTK_WIDGET_CLASS(gtk_preserve_window_parent_class)->unrealize(widget);
}
}
gboolean gtk_preserve_window_get_preserve(GtkPreserveWindow* window) {
g_return_val_if_fail(GTK_IS_PRESERVE_WINDOW(window), FALSE);
GtkPreserveWindowPrivate* priv = GTK_PRESERVE_WINDOW_GET_PRIVATE(window);
return priv->preserve_window;
}
void gtk_preserve_window_set_preserve(GtkPreserveWindow* window,
gboolean value) {
g_return_if_fail(GTK_IS_PRESERVE_WINDOW(window));
GtkPreserveWindowPrivate* priv = GTK_PRESERVE_WINDOW_GET_PRIVATE(window);
priv->preserve_window = value;
GtkWidget* widget = GTK_WIDGET(window);
if (value && !widget->window) {
GdkWindowAttr attributes;
gint attributes_mask;
// We may not know the width and height, so we rely on the fact
// that a size-allocation will resize it later.
attributes.width = 1;
attributes.height = 1;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.visual = gtk_widget_get_visual(widget);
attributes.colormap = gtk_widget_get_colormap(widget);
attributes_mask = GDK_WA_VISUAL | GDK_WA_COLORMAP;
widget->window = gdk_window_new(
gdk_get_default_root_window(), &attributes, attributes_mask);
} else if (!value && widget->window && !GTK_WIDGET_REALIZED(widget)) {
gdk_window_destroy(widget->window);
widget->window = NULL;
}
}
void gtk_preserve_window_size_allocate(GtkWidget* widget,
GtkAllocation* allocation) {
g_return_if_fail(GTK_IS_PRESERVE_WINDOW(widget));
GtkPreserveWindowPrivate* priv = GTK_PRESERVE_WINDOW_GET_PRIVATE(widget);
if (priv->delegate_resize) {
// Just update the state. Someone else will gdk_window_resize the
// associated GdkWindow.
widget->allocation = *allocation;
} else {
GTK_WIDGET_CLASS(gtk_preserve_window_parent_class)->size_allocate(
widget, allocation);
}
}
void gtk_preserve_window_delegate_resize(GtkPreserveWindow* widget,
gboolean delegate) {
GtkPreserveWindowPrivate* priv = GTK_PRESERVE_WINDOW_GET_PRIVATE(widget);
priv->delegate_resize = delegate;
}
G_END_DECLS
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