gtk2/gtk/gtkinvisible.c
Benjamin Otte 5abc4749de gtk: Chain up in toplevels' realize
Don't call set_realized() manually.
2018-04-11 03:16:34 +02:00

294 lines
7.6 KiB
C

/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include <gdk/gdk.h>
#include "gtkinvisible.h"
#include "gtkwidgetprivate.h"
#include "gtkprivate.h"
#include "gtkintl.h"
/**
* SECTION:gtkinvisible
* @Short_description: A widget which is not displayed
* @Title: GtkInvisible
*
* The #GtkInvisible widget is used internally in GTK+, and is probably not
* very useful for application developers.
*
* It is used for reliable pointer grabs and selection handling in the code
* for drag-and-drop.
*/
struct _GtkInvisiblePrivate
{
GdkDisplay *display;
gboolean has_user_ref_count;
};
enum {
PROP_0,
PROP_DISPLAY,
LAST_ARG
};
static void gtk_invisible_destroy (GtkWidget *widget);
static void gtk_invisible_realize (GtkWidget *widget);
static void gtk_invisible_style_updated (GtkWidget *widget);
static void gtk_invisible_show (GtkWidget *widget);
static void gtk_invisible_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_invisible_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_invisible_constructed (GObject *object);
G_DEFINE_TYPE_WITH_PRIVATE (GtkInvisible, gtk_invisible, GTK_TYPE_WIDGET)
static void
gtk_invisible_class_init (GtkInvisibleClass *class)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
widget_class = (GtkWidgetClass*) class;
gobject_class = (GObjectClass*) class;
widget_class->realize = gtk_invisible_realize;
widget_class->style_updated = gtk_invisible_style_updated;
widget_class->show = gtk_invisible_show;
widget_class->destroy = gtk_invisible_destroy;
gobject_class->set_property = gtk_invisible_set_property;
gobject_class->get_property = gtk_invisible_get_property;
gobject_class->constructed = gtk_invisible_constructed;
g_object_class_install_property (gobject_class,
PROP_DISPLAY,
g_param_spec_object ("display",
P_("Display"),
P_("The display where this window will be displayed"),
GDK_TYPE_DISPLAY,
GTK_PARAM_READWRITE));
}
static void
gtk_invisible_init (GtkInvisible *invisible)
{
GtkInvisiblePrivate *priv;
invisible->priv = gtk_invisible_get_instance_private (invisible);
priv = invisible->priv;
gtk_widget_set_has_surface (GTK_WIDGET (invisible), TRUE);
_gtk_widget_set_is_toplevel (GTK_WIDGET (invisible), TRUE);
g_object_ref_sink (invisible);
priv->has_user_ref_count = TRUE;
priv->display = gdk_display_get_default ();
}
static void
gtk_invisible_destroy (GtkWidget *widget)
{
GtkInvisible *invisible = GTK_INVISIBLE (widget);
GtkInvisiblePrivate *priv = invisible->priv;
if (priv->has_user_ref_count)
{
priv->has_user_ref_count = FALSE;
g_object_unref (invisible);
}
GTK_WIDGET_CLASS (gtk_invisible_parent_class)->destroy (widget);
}
/**
* gtk_invisible_new_for_display:
* @display: a #GdkDisplay which identifies on which
* the new #GtkInvisible will be created.
*
* Creates a new #GtkInvisible object for a specified display.
*
* Returns: a newly created #GtkInvisible object
**/
GtkWidget*
gtk_invisible_new_for_display (GdkDisplay *display)
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
return g_object_new (GTK_TYPE_INVISIBLE, "display", display, NULL);
}
/**
* gtk_invisible_new:
*
* Creates a new #GtkInvisible.
*
* Returns: a new #GtkInvisible.
**/
GtkWidget*
gtk_invisible_new (void)
{
return g_object_new (GTK_TYPE_INVISIBLE, NULL);
}
/**
* gtk_invisible_set_display:
* @invisible: a #GtkInvisible.
* @display: a #GdkDisplay.
*
* Sets the #GdkDisplay where the #GtkInvisible object will be displayed.
**/
void
gtk_invisible_set_display (GtkInvisible *invisible,
GdkDisplay *display)
{
GtkInvisiblePrivate *priv;
GtkWidget *widget;
GdkDisplay *previous_display;
gboolean was_realized;
g_return_if_fail (GTK_IS_INVISIBLE (invisible));
g_return_if_fail (GDK_IS_DISPLAY (display));
priv = invisible->priv;
if (display == priv->display)
return;
widget = GTK_WIDGET (invisible);
previous_display = priv->display;
was_realized = gtk_widget_get_realized (widget);
if (was_realized)
gtk_widget_unrealize (widget);
priv->display = display;
if (display != previous_display)
_gtk_widget_propagate_display_changed (widget, previous_display);
g_object_notify (G_OBJECT (invisible), "display");
if (was_realized)
gtk_widget_realize (widget);
}
/**
* gtk_invisible_get_display:
* @invisible: a #GtkInvisible.
*
* Returns the #GdkDisplay object associated with @invisible
*
* Returns: (transfer none): the associated #GdkDisplay.
**/
GdkDisplay *
gtk_invisible_get_display (GtkInvisible *invisible)
{
g_return_val_if_fail (GTK_IS_INVISIBLE (invisible), NULL);
return invisible->priv->display;
}
static void
gtk_invisible_realize (GtkWidget *widget)
{
GdkSurface *surface;
surface = gdk_surface_new_temp (gtk_widget_get_display (widget));
gtk_widget_set_surface (widget, surface);
gtk_widget_register_surface (widget, surface);
GTK_WIDGET_CLASS (gtk_invisible_parent_class)->realize (widget);
}
static void
gtk_invisible_style_updated (GtkWidget *widget)
{
/* Don't chain up to parent implementation */
}
static void
gtk_invisible_show (GtkWidget *widget)
{
_gtk_widget_set_visible_flag (widget, TRUE);
gtk_widget_map (widget);
}
static void
gtk_invisible_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkInvisible *invisible = GTK_INVISIBLE (object);
switch (prop_id)
{
case PROP_DISPLAY:
gtk_invisible_set_display (invisible, g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_invisible_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkInvisible *invisible = GTK_INVISIBLE (object);
GtkInvisiblePrivate *priv = invisible->priv;
switch (prop_id)
{
case PROP_DISPLAY:
g_value_set_object (value, priv->display);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* We use a constructor here so that we can realize the invisible on
* the correct display after the “display” property has been set
*/
static void
gtk_invisible_constructed (GObject *object)
{
G_OBJECT_CLASS (gtk_invisible_parent_class)->constructed (object);
gtk_widget_realize (GTK_WIDGET (object));
}