gtk2/gdk/gdkscreen.c
Benjamin Otte 4585af5719 gdk: Remove visual APIs from GdkScreen
gdk_screen_list_visuals(), gdk_screen_get_system_visual() and
gdk_screen_get_rgba_visual() are gone now.
2016-11-04 00:02:37 +01:00

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/*
* gdkscreen.c
*
* Copyright 2001 Sun Microsystems Inc.
*
* Erwann Chenede <erwann.chenede@sun.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gdkinternals.h"
#include "gdkscreenprivate.h"
#include "gdkrectangle.h"
#include "gdkwindow.h"
#include "gdkintl.h"
/**
* SECTION:gdkscreen
* @Short_description: Object representing a physical screen
* @Title: GdkScreen
*
* #GdkScreen objects are the GDK representation of the screen on
* which windows can be displayed and on which the pointer moves.
* X originally identified screens with physical screens, but
* nowadays it is more common to have a single #GdkScreen which
* combines several physical monitors (see gdk_screen_get_n_monitors()).
*
* GdkScreen is used throughout GDK and GTK+ to specify which screen
* the top level windows are to be displayed on.
*/
static void gdk_screen_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gdk_screen_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
enum
{
PROP_0,
PROP_RESOLUTION
};
enum
{
SIZE_CHANGED,
MONITORS_CHANGED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE (GdkScreen, gdk_screen, G_TYPE_OBJECT)
static void
gdk_screen_class_init (GdkScreenClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->set_property = gdk_screen_set_property;
object_class->get_property = gdk_screen_get_property;
g_object_class_install_property (object_class,
PROP_RESOLUTION,
g_param_spec_double ("resolution",
P_("Font resolution"),
P_("The resolution for fonts on the screen"),
-1.0,
10000.0,
-1.0,
G_PARAM_READWRITE|G_PARAM_STATIC_NAME|
G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
/**
* GdkScreen::monitors-changed:
* @screen: the object on which the signal is emitted
*
* The ::monitors-changed signal is emitted when the number, size
* or position of the monitors attached to the screen change.
*
* Only for X11 and OS X for now. A future implementation for Win32
* may be a possibility.
*
* Since: 2.14
*/
signals[MONITORS_CHANGED] =
g_signal_new (g_intern_static_string ("monitors-changed"),
G_OBJECT_CLASS_TYPE (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GdkScreenClass, monitors_changed),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE,
0);
}
static void
gdk_screen_init (GdkScreen *screen)
{
screen->resolution = -1.;
}
void
_gdk_screen_close (GdkScreen *screen)
{
g_return_if_fail (GDK_IS_SCREEN (screen));
if (!screen->closed)
{
screen->closed = TRUE;
g_object_run_dispose (G_OBJECT (screen));
}
}
/**
* gdk_screen_set_resolution:
* @screen: a #GdkScreen
* @dpi: the resolution in “dots per inch”. (Physical inches arent actually
* involved; the terminology is conventional.)
* Sets the resolution for font handling on the screen. This is a
* scale factor between points specified in a #PangoFontDescription
* and cairo units. The default value is 96, meaning that a 10 point
* font will be 13 units high. (10 * 96. / 72. = 13.3).
*
* Since: 2.10
**/
void
gdk_screen_set_resolution (GdkScreen *screen,
gdouble dpi)
{
g_return_if_fail (GDK_IS_SCREEN (screen));
if (dpi < 0)
dpi = -1.0;
screen->resolution_set = TRUE;
if (screen->resolution != dpi)
{
screen->resolution = dpi;
g_object_notify (G_OBJECT (screen), "resolution");
}
}
/* Just like gdk_screen_set_resolution(), but doesn't change
* screen->resolution. This is us to allow us to distinguish
* resolution changes that the backend picks up from resolution
* changes made through the public API - perhaps using
* g_object_set(<GtkSetting>, "gtk-xft-dpi", ...);
*/
void
_gdk_screen_set_resolution (GdkScreen *screen,
gdouble dpi)
{
g_return_if_fail (GDK_IS_SCREEN (screen));
if (dpi < 0)
dpi = -1.0;
if (screen->resolution != dpi)
{
screen->resolution = dpi;
g_object_notify (G_OBJECT (screen), "resolution");
}
}
/**
* gdk_screen_get_resolution:
* @screen: a #GdkScreen
*
* Gets the resolution for font handling on the screen; see
* gdk_screen_set_resolution() for full details.
*
* Returns: the current resolution, or -1 if no resolution
* has been set.
*
* Since: 2.10
**/
gdouble
gdk_screen_get_resolution (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), -1.0);
return screen->resolution;
}
static void
gdk_screen_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GdkScreen *screen = GDK_SCREEN (object);
switch (prop_id)
{
case PROP_RESOLUTION:
g_value_set_double (value, gdk_screen_get_resolution (screen));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gdk_screen_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GdkScreen *screen = GDK_SCREEN (object);
switch (prop_id)
{
case PROP_RESOLUTION:
gdk_screen_set_resolution (screen, g_value_get_double (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/**
* gdk_screen_get_display:
* @screen: a #GdkScreen
*
* Gets the display to which the @screen belongs.
*
* Returns: (transfer none): the display to which @screen belongs
*
* Since: 2.2
**/
GdkDisplay *
gdk_screen_get_display (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
return GDK_SCREEN_GET_CLASS (screen)->get_display (screen);
}
/**
* gdk_screen_get_root_window:
* @screen: a #GdkScreen
*
* Gets the root window of @screen.
*
* Returns: (transfer none): the root window
*
* Since: 2.2
**/
GdkWindow *
gdk_screen_get_root_window (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
return GDK_SCREEN_GET_CLASS (screen)->get_root_window (screen);
}
/**
* gdk_screen_get_setting:
* @screen: the #GdkScreen where the setting is located
* @name: the name of the setting
* @value: location to store the value of the setting
*
* Retrieves a desktop-wide setting such as double-click time
* for the #GdkScreen @screen.
*
* FIXME needs a list of valid settings here, or a link to
* more information.
*
* Returns: %TRUE if the setting existed and a value was stored
* in @value, %FALSE otherwise.
*
* Since: 2.2
**/
gboolean
gdk_screen_get_setting (GdkScreen *screen,
const gchar *name,
GValue *value)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), FALSE);
g_return_val_if_fail (name != NULL, FALSE);
g_return_val_if_fail (value != NULL, FALSE);
return GDK_SCREEN_GET_CLASS (screen)->get_setting (screen, name, value);
}