mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-11-18 09:00:34 +00:00
329 lines
8.4 KiB
C
329 lines
8.4 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
|
|
{
|
|
GdkScreen *screen;
|
|
gboolean has_user_ref_count;
|
|
};
|
|
|
|
enum {
|
|
PROP_0,
|
|
PROP_SCREEN,
|
|
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_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 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->size_allocate = gtk_invisible_size_allocate;
|
|
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_SCREEN,
|
|
g_param_spec_object ("screen",
|
|
P_("Screen"),
|
|
P_("The screen where this window will be displayed"),
|
|
GDK_TYPE_SCREEN,
|
|
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_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 ();
|
|
}
|
|
|
|
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_screen:
|
|
* @screen: a #GdkScreen which identifies on which
|
|
* the new #GtkInvisible will be created.
|
|
*
|
|
* Creates a new #GtkInvisible object for a specified screen
|
|
*
|
|
* Returns: 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.
|
|
*
|
|
* Returns: 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
|
|
*
|
|
* Returns: (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 = gdk_screen_get_root_window (gtk_widget_get_screen (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);
|
|
gtk_widget_register_window (widget, window);
|
|
}
|
|
|
|
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_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 void
|
|
gtk_invisible_constructed (GObject *object)
|
|
{
|
|
G_OBJECT_CLASS (gtk_invisible_parent_class)->constructed (object);
|
|
|
|
gtk_widget_realize (GTK_WIDGET (object));
|
|
}
|