/*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "gdk.h" /* For gdk_rectangle_intersect() */
#include "gdkcolor.h"
#include "gdkwindow.h"
#include "gdkscreen.h"
#include "gdkintl.h"
#include "gdkalias.h"
static void gdk_screen_dispose (GObject *object);
static void gdk_screen_finalize (GObject *object);
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_FONT_OPTIONS,
PROP_RESOLUTION
};
enum
{
SIZE_CHANGED,
COMPOSITED_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->dispose = gdk_screen_dispose;
object_class->finalize = gdk_screen_finalize;
object_class->set_property = gdk_screen_set_property;
object_class->get_property = gdk_screen_get_property;
g_object_class_install_property (object_class,
PROP_FONT_OPTIONS,
g_param_spec_pointer ("font-options",
P_("Font options"),
P_("The default font options for the screen"),
G_PARAM_READWRITE|G_PARAM_STATIC_NAME|
G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
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"),
-G_MAXDOUBLE,
G_MAXDOUBLE,
-1.0,
G_PARAM_READWRITE|G_PARAM_STATIC_NAME|
G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
/**
* GdkScreen::size-changed:
* @screen: the object on which the signal is emitted
*
* The ::size-changed signal is emitted when the pixel width or
* height of a screen changes.
*
* Since: 2.2
*/
signals[SIZE_CHANGED] =
g_signal_new (g_intern_static_string ("size-changed"),
G_OBJECT_CLASS_TYPE (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GdkScreenClass, size_changed),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE,
0);
/**
* GdkScreen::composited-changed:
* @screen: the object on which the signal is emitted
*
* The ::composited-changed signal is emitted when the composited
* status of the screen changes
*
* Since: 2.10
*/
signals[COMPOSITED_CHANGED] =
g_signal_new (g_intern_static_string ("composited-changed"),
G_OBJECT_CLASS_TYPE (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GdkScreenClass, composited_changed),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE,
0);
/**
* 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.;
}
static void
gdk_screen_dispose (GObject *object)
{
GdkScreen *screen = GDK_SCREEN (object);
gint i;
for (i = 0; i < 32; ++i)
{
if (screen->exposure_gcs[i])
{
g_object_unref (screen->exposure_gcs[i]);
screen->exposure_gcs[i] = NULL;
}
if (screen->normal_gcs[i])
{
g_object_unref (screen->normal_gcs[i]);
screen->normal_gcs[i] = NULL;
}
}
G_OBJECT_CLASS (gdk_screen_parent_class)->dispose (object);
}
static void
gdk_screen_finalize (GObject *object)
{
GdkScreen *screen = GDK_SCREEN (object);
if (screen->font_options)
cairo_font_options_destroy (screen->font_options);
G_OBJECT_CLASS (gdk_screen_parent_class)->finalize (object);
}
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));
}
}
/* Fallback used when the monitor "at" a point or window
* doesn't exist.
*/
static gint
get_nearest_monitor (GdkScreen *screen,
gint x,
gint y)
{
gint num_monitors, i;
gint nearest_dist = G_MAXINT;
gint nearest_monitor = 0;
g_return_val_if_fail (GDK_IS_SCREEN (screen), -1);
num_monitors = gdk_screen_get_n_monitors (screen);
for (i = 0; i < num_monitors; i++)
{
GdkRectangle monitor;
gint dist_x, dist_y, dist;
gdk_screen_get_monitor_geometry (screen, i, &monitor);
if (x < monitor.x)
dist_x = monitor.x - x;
else if (x >= monitor.x + monitor.width)
dist_x = x - (monitor.x + monitor.width) + 1;
else
dist_x = 0;
if (y < monitor.y)
dist_y = monitor.y - y;
else if (y >= monitor.y + monitor.height)
dist_y = y - (monitor.y + monitor.height) + 1;
else
dist_y = 0;
dist = dist_x + dist_y;
if (dist < nearest_dist)
{
nearest_dist = dist;
nearest_monitor = i;
}
}
return nearest_monitor;
}
/**
* gdk_screen_get_monitor_at_point:
* @screen: a #GdkScreen.
* @x: the x coordinate in the virtual screen.
* @y: the y coordinate in the virtual screen.
*
* Returns the monitor number in which the point (@x,@y) is located.
*
* Returns: the monitor number in which the point (@x,@y) lies, or
* a monitor close to (@x,@y) if the point is not in any monitor.
*
* Since: 2.2
**/
gint
gdk_screen_get_monitor_at_point (GdkScreen *screen,
gint x,
gint y)
{
gint num_monitors, i;
g_return_val_if_fail (GDK_IS_SCREEN (screen), -1);
num_monitors = gdk_screen_get_n_monitors (screen);
for (i=0;i<num_monitors;i++)
{
GdkRectangle monitor;
gdk_screen_get_monitor_geometry (screen, i, &monitor);
if (x >= monitor.x &&
x < monitor.x + monitor.width &&
y >= monitor.y &&
y < (monitor.y + monitor.height))
return i;
}
return get_nearest_monitor (screen, x, y);
}
/**
* gdk_screen_get_monitor_at_window:
* @screen: a #GdkScreen.
* @window: a #GdkWindow
* @returns: the monitor number in which most of @window is located,
* or if @window does not intersect any monitors, a monitor,
* close to @window.
*
* Returns the number of the monitor in which the largest area of the
* bounding rectangle of @window resides.
*
* Since: 2.2
**/
gint
gdk_screen_get_monitor_at_window (GdkScreen *screen,
GdkWindow *window)
{
gint num_monitors, i, area = 0, screen_num = -1;
GdkRectangle win_rect;
g_return_val_if_fail (GDK_IS_SCREEN (screen), -1);
gdk_window_get_geometry (window, &win_rect.x, &win_rect.y, &win_rect.width,
&win_rect.height, NULL);
gdk_window_get_origin (window, &win_rect.x, &win_rect.y);
num_monitors = gdk_screen_get_n_monitors (screen);
for (i=0;i<num_monitors;i++)
{
GdkRectangle tmp_monitor, intersect;
gdk_screen_get_monitor_geometry (screen, i, &tmp_monitor);
gdk_rectangle_intersect (&win_rect, &tmp_monitor, &intersect);
if (intersect.width * intersect.height > area)
{
area = intersect.width * intersect.height;
screen_num = i;
}
}
if (screen_num >= 0)
return screen_num;
else
return get_nearest_monitor (screen,
win_rect.x + win_rect.width / 2,
win_rect.y + win_rect.height / 2);
}
/**
* gdk_screen_width:
*
* Returns the width of the default screen in pixels.
*
* Return value: the width of the default screen in pixels.
**/
gint
gdk_screen_width (void)
{
return gdk_screen_get_width (gdk_screen_get_default ());
}
/**
* gdk_screen_height:
*
* Returns the height of the default screen in pixels.
*
* Return value: the height of the default screen in pixels.
**/
gint
gdk_screen_height (void)
{
return gdk_screen_get_height (gdk_screen_get_default ());
}
/**
* gdk_screen_width_mm:
*
* Returns the width of the default screen in millimeters.
* Note that on many X servers this value will not be correct.
*
* Return value: the width of the default screen in millimeters,
* though it is not always correct.
**/
gint
gdk_screen_width_mm (void)
{
return gdk_screen_get_width_mm (gdk_screen_get_default ());
}
/**
* gdk_screen_height_mm:
*
* Returns the height of the default screen in millimeters.
* Note that on many X servers this value will not be correct.
*
* Return value: the height of the default screen in millimeters,
* though it is not always correct.
**/
gint
gdk_screen_height_mm (void)
{
return gdk_screen_get_height_mm (gdk_screen_get_default ());
}
/**
* gdk_screen_set_font_options:
* @screen: a #GdkScreen
* @options: (allow-none): a #cairo_font_options_t, or %NULL to unset any
* previously set default font options.
*
* Sets the default font options for the screen. These
* options will be set on any #PangoContext's newly created
* with gdk_pango_context_get_for_screen(). Changing the
* default set of font options does not affect contexts that
* have already been created.
*
* Since: 2.10
**/
void
gdk_screen_set_font_options (GdkScreen *screen,
const cairo_font_options_t *options)
{
g_return_if_fail (GDK_IS_SCREEN (screen));
if (screen->font_options != options)
{
if (screen->font_options)
cairo_font_options_destroy (screen->font_options);
if (options)
screen->font_options = cairo_font_options_copy (options);
else
screen->font_options = NULL;
g_object_notify (G_OBJECT (screen), "font-options");
}
}
/**
* gdk_screen_get_font_options:
* @screen: a #GdkScreen
*
* Gets any options previously set with gdk_screen_set_font_options().
*
* Return value: the current font options, or %NULL if no default
* font options have been set.
*
* Since: 2.10
**/
const cairo_font_options_t *
gdk_screen_get_font_options (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
return screen->font_options;
}
/**
* 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;
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.
*
* Return value: 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_FONT_OPTIONS:
g_value_set_pointer (value, (gpointer) gdk_screen_get_font_options (screen));
break;
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_FONT_OPTIONS:
gdk_screen_set_font_options (screen, g_value_get_pointer (value));
break;
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;
}
}
#define __GDK_SCREEN_C__
#include "gdkaliasdef.c"