mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-11-10 19:00:08 +00:00
d249e77bcb
Switch code to use gdk_display_is_composited() instead. The new code also doesn't use a vfunc to query the property but rather requires the backend to call set_composited()/set_rgba() to change the value.
389 lines
10 KiB
C
389 lines
10 KiB
C
/*
|
||
* 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. it is also used to
|
||
* query the screen specification and default settings such as
|
||
* the default visual (gdk_screen_get_system_visual()), the dimensions
|
||
* of the physical monitors (gdk_screen_get_monitor_geometry()), etc.
|
||
*/
|
||
|
||
|
||
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 aren’t 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_list_visuals:
|
||
* @screen: the relevant #GdkScreen.
|
||
*
|
||
* Lists the available visuals for the specified @screen.
|
||
* A visual describes a hardware image data format.
|
||
* For example, a visual might support 24-bit color, or 8-bit color,
|
||
* and might expect pixels to be in a certain format.
|
||
*
|
||
* Call g_list_free() on the return value when you’re finished with it.
|
||
*
|
||
* Returns: (transfer container) (element-type GdkVisual):
|
||
* a list of visuals; the list must be freed, but not its contents
|
||
*
|
||
* Since: 2.2
|
||
**/
|
||
GList *
|
||
gdk_screen_list_visuals (GdkScreen *screen)
|
||
{
|
||
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
|
||
|
||
return GDK_SCREEN_GET_CLASS (screen)->list_visuals (screen);
|
||
}
|
||
|
||
/**
|
||
* gdk_screen_get_system_visual:
|
||
* @screen: a #GdkScreen.
|
||
*
|
||
* Get the system’s default visual for @screen.
|
||
* This is the visual for the root window of the display.
|
||
* The return value should not be freed.
|
||
*
|
||
* Returns: (transfer none): the system visual
|
||
*
|
||
* Since: 2.2
|
||
**/
|
||
GdkVisual *
|
||
gdk_screen_get_system_visual (GdkScreen * screen)
|
||
{
|
||
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
|
||
|
||
return GDK_SCREEN_GET_CLASS (screen)->get_system_visual (screen);
|
||
}
|
||
|
||
/**
|
||
* gdk_screen_get_rgba_visual:
|
||
* @screen: a #GdkScreen
|
||
*
|
||
* Gets a visual to use for creating windows with an alpha channel.
|
||
* The windowing system on which GTK+ is running
|
||
* may not support this capability, in which case %NULL will
|
||
* be returned. Even if a non-%NULL value is returned, its
|
||
* possible that the window’s alpha channel won’t be honored
|
||
* when displaying the window on the screen: in particular, for
|
||
* X an appropriate windowing manager and compositing manager
|
||
* must be running to provide appropriate display.
|
||
*
|
||
* This functionality is not implemented in the Windows backend.
|
||
*
|
||
* For setting an overall opacity for a top-level window, see
|
||
* gdk_window_set_opacity().
|
||
*
|
||
* Returns: (nullable) (transfer none): a visual to use for windows
|
||
* with an alpha channel or %NULL if the capability is not
|
||
* available.
|
||
*
|
||
* Since: 2.8
|
||
**/
|
||
GdkVisual *
|
||
gdk_screen_get_rgba_visual (GdkScreen *screen)
|
||
{
|
||
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
|
||
|
||
return GDK_SCREEN_GET_CLASS (screen)->get_rgba_visual (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);
|
||
}
|