gtk2/gtk/gtkinvisible.c
2010-09-21 00:18:11 -04:00

342 lines
9.1 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* 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 "gtkprivate.h"
#include "gtkintl.h"
struct _GtkInvisiblePrivate
{
GdkScreen *screen;
gboolean has_user_ref_count;
};
enum {
PROP_0,
PROP_SCREEN,
LAST_ARG
};
static void gtk_invisible_destroy (GtkObject *object);
static void gtk_invisible_realize (GtkWidget *widget);
static void gtk_invisible_style_set (GtkWidget *widget,
GtkStyle *previous_style);
static void gtk_invisible_show (GtkWidget *widget);
static void gtk_invisible_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
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 GObject *gtk_invisible_constructor (GType type,
guint n_construct_properties,
GObjectConstructParam *construct_params);
G_DEFINE_TYPE (GtkInvisible, gtk_invisible, GTK_TYPE_WIDGET)
static void
gtk_invisible_class_init (GtkInvisibleClass *class)
{
GObjectClass *gobject_class;
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
widget_class = (GtkWidgetClass*) class;
object_class = (GtkObjectClass*) class;
gobject_class = (GObjectClass*) class;
widget_class->realize = gtk_invisible_realize;
widget_class->style_set = gtk_invisible_style_set;
widget_class->show = gtk_invisible_show;
widget_class->size_allocate = gtk_invisible_size_allocate;
object_class->destroy = gtk_invisible_destroy;
gobject_class->set_property = gtk_invisible_set_property;
gobject_class->get_property = gtk_invisible_get_property;
gobject_class->constructor = gtk_invisible_constructor;
g_object_class_install_property (gobject_class,
PROP_SCREEN,
g_param_spec_object ("screen",
P_("Screen"),
P_("The screen where this window will be displayed"),
GDK_TYPE_SCREEN,
GTK_PARAM_READWRITE));
g_type_class_add_private (class, sizeof (GtkInvisiblePrivate));
}
static void
gtk_invisible_init (GtkInvisible *invisible)
{
GtkInvisiblePrivate *priv;
GdkColormap *colormap;
invisible->priv = G_TYPE_INSTANCE_GET_PRIVATE (invisible,
GTK_TYPE_INVISIBLE,
GtkInvisiblePrivate);
priv = invisible->priv;
gtk_widget_set_has_window (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->screen = gdk_screen_get_default ();
colormap = _gtk_widget_peek_colormap ();
if (colormap)
gtk_widget_set_colormap (GTK_WIDGET (invisible), colormap);
}
static void
gtk_invisible_destroy (GtkObject *object)
{
GtkInvisible *invisible = GTK_INVISIBLE (object);
GtkInvisiblePrivate *priv = invisible->priv;
if (priv->has_user_ref_count)
{
priv->has_user_ref_count = FALSE;
g_object_unref (invisible);
}
GTK_OBJECT_CLASS (gtk_invisible_parent_class)->destroy (object);
}
/**
* gtk_invisible_new_for_screen:
* @screen: a #GdkScreen which identifies on which
* the new #GtkInvisible will be created.
*
* Creates a new #GtkInvisible object for a specified screen
*
* Return value: a newly created #GtkInvisible object
*
* Since: 2.2
**/
GtkWidget*
gtk_invisible_new_for_screen (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
return g_object_new (GTK_TYPE_INVISIBLE, "screen", screen, NULL);
}
/**
* gtk_invisible_new:
*
* Creates a new #GtkInvisible.
*
* Return value: a new #GtkInvisible.
**/
GtkWidget*
gtk_invisible_new (void)
{
return g_object_new (GTK_TYPE_INVISIBLE, NULL);
}
/**
* gtk_invisible_set_screen:
* @invisible: a #GtkInvisible.
* @screen: a #GdkScreen.
*
* Sets the #GdkScreen where the #GtkInvisible object will be displayed.
*
* Since: 2.2
**/
void
gtk_invisible_set_screen (GtkInvisible *invisible,
GdkScreen *screen)
{
GtkInvisiblePrivate *priv;
GtkWidget *widget;
GdkScreen *previous_screen;
gboolean was_realized;
g_return_if_fail (GTK_IS_INVISIBLE (invisible));
g_return_if_fail (GDK_IS_SCREEN (screen));
priv = invisible->priv;
if (screen == priv->screen)
return;
widget = GTK_WIDGET (invisible);
previous_screen = priv->screen;
was_realized = gtk_widget_get_realized (widget);
if (was_realized)
gtk_widget_unrealize (widget);
priv->screen = screen;
if (screen != previous_screen)
_gtk_widget_propagate_screen_changed (widget, previous_screen);
g_object_notify (G_OBJECT (invisible), "screen");
if (was_realized)
gtk_widget_realize (widget);
}
/**
* gtk_invisible_get_screen:
* @invisible: a #GtkInvisible.
*
* Returns the #GdkScreen object associated with @invisible
*
* Return value: (transfer none): the associated #GdkScreen.
*
* Since: 2.2
**/
GdkScreen *
gtk_invisible_get_screen (GtkInvisible *invisible)
{
g_return_val_if_fail (GTK_IS_INVISIBLE (invisible), NULL);
return invisible->priv->screen;
}
static void
gtk_invisible_realize (GtkWidget *widget)
{
GdkWindow *parent;
GdkWindow *window;
GdkWindowAttr attributes;
gint attributes_mask;
gtk_widget_set_realized (widget, TRUE);
parent = gtk_widget_get_parent_window (widget);
if (parent == NULL)
parent = gtk_widget_get_root_window (widget);
attributes.x = -100;
attributes.y = -100;
attributes.width = 10;
attributes.height = 10;
attributes.window_type = GDK_WINDOW_TEMP;
attributes.wclass = GDK_INPUT_ONLY;
attributes.override_redirect = TRUE;
attributes.event_mask = gtk_widget_get_events (widget);
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_NOREDIR;
window = gdk_window_new (parent, &attributes, attributes_mask);
gtk_widget_set_window (widget, window);
gdk_window_set_user_data (window, widget);
gtk_widget_style_attach (widget);
}
static void
gtk_invisible_style_set (GtkWidget *widget,
GtkStyle *previous_style)
{
/* Don't chain up to parent implementation */
}
static void
gtk_invisible_show (GtkWidget *widget)
{
GTK_WIDGET_SET_FLAGS (widget, GTK_VISIBLE);
gtk_widget_map (widget);
}
static void
gtk_invisible_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
gtk_widget_set_allocation (widget, allocation);
}
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_SCREEN:
gtk_invisible_set_screen (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_SCREEN:
g_value_set_object (value, priv->screen);
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 screen after the "screen" property has been set
*/
static GObject*
gtk_invisible_constructor (GType type,
guint n_construct_properties,
GObjectConstructParam *construct_params)
{
GObject *object;
object = G_OBJECT_CLASS (gtk_invisible_parent_class)->constructor (type,
n_construct_properties,
construct_params);
gtk_widget_realize (GTK_WIDGET (object));
return object;
}