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Learning_GTK4_tree/gdk/gdkmonitor.c

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2023-12-12 11:36:42 +01:00
/*
* gdkmonitor.c
*
* Copyright 2016 Red Hat, Inc.
*
* Matthias Clasen <mclasen@redhat.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 "gdkmonitorprivate.h"
#include "gdkdisplay.h"
#include "gdkenumtypes.h"
#include "gdkrectangle.h"
/**
* GdkMonitor:
*
* `GdkMonitor` objects represent the individual outputs that are
* associated with a `GdkDisplay`.
*
* `GdkDisplay` keeps a `GListModel` to enumerate and monitor
* monitors with [method@Gdk.Display.get_monitors]. You can use
* [method@Gdk.Display.get_monitor_at_surface] to find a particular
* monitor.
*/
enum {
PROP_0,
PROP_DESCRIPTION,
PROP_DISPLAY,
PROP_MANUFACTURER,
PROP_MODEL,
PROP_CONNECTOR,
PROP_SCALE_FACTOR,
PROP_GEOMETRY,
PROP_WIDTH_MM,
PROP_HEIGHT_MM,
PROP_REFRESH_RATE,
PROP_SUBPIXEL_LAYOUT,
PROP_VALID,
LAST_PROP
};
static GParamSpec *props[LAST_PROP] = { NULL, };
enum {
INVALIDATE,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE (GdkMonitor, gdk_monitor, G_TYPE_OBJECT)
static void
gdk_monitor_init (GdkMonitor *monitor)
{
monitor->scale_factor = 1;
monitor->valid = TRUE;
}
static void
gdk_monitor_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GdkMonitor *monitor = GDK_MONITOR (object);
switch (prop_id)
{
case PROP_DESCRIPTION:
g_value_set_string (value, monitor->description);
break;
case PROP_DISPLAY:
g_value_set_object (value, monitor->display);
break;
case PROP_MANUFACTURER:
g_value_set_string (value, monitor->manufacturer);
break;
case PROP_MODEL:
g_value_set_string (value, monitor->model);
break;
case PROP_CONNECTOR:
g_value_set_string (value, monitor->connector);
break;
case PROP_SCALE_FACTOR:
g_value_set_int (value, monitor->scale_factor);
break;
case PROP_GEOMETRY:
g_value_set_boxed (value, &monitor->geometry);
break;
case PROP_WIDTH_MM:
g_value_set_int (value, monitor->width_mm);
break;
case PROP_HEIGHT_MM:
g_value_set_int (value, monitor->height_mm);
break;
case PROP_REFRESH_RATE:
g_value_set_int (value, monitor->refresh_rate);
break;
case PROP_SUBPIXEL_LAYOUT:
g_value_set_enum (value, monitor->subpixel_layout);
break;
case PROP_VALID:
g_value_set_boolean (value, monitor->valid);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
gdk_monitor_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GdkMonitor *monitor = GDK_MONITOR (object);
switch (prop_id)
{
case PROP_DISPLAY:
monitor->display = g_value_get_object (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
gdk_monitor_finalize (GObject *object)
{
GdkMonitor *monitor = GDK_MONITOR (object);
g_free (monitor->description);
g_free (monitor->connector);
g_free (monitor->manufacturer);
g_free (monitor->model);
G_OBJECT_CLASS (gdk_monitor_parent_class)->finalize (object);
}
static void
gdk_monitor_class_init (GdkMonitorClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
object_class->finalize = gdk_monitor_finalize;
object_class->get_property = gdk_monitor_get_property;
object_class->set_property = gdk_monitor_set_property;
/**
* GdkMonitor:description: (attributes org.gtk.Property.get=gdk_monitor_get_description)
*
* A short description of the monitor, meant for display to the user.
*
* Since: 4.10
*/
props[PROP_DESCRIPTION] =
g_param_spec_string ("description", NULL, NULL,
NULL,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
/**
* GdkMonitor:display: (attributes org.gtk.Property.get=gdk_monitor_get_display)
*
* The `GdkDisplay` of the monitor.
*/
props[PROP_DISPLAY] =
g_param_spec_object ("display", NULL, NULL,
GDK_TYPE_DISPLAY,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);
/**
* GdkMonitor:manufacturer: (attributes org.gtk.Property.get=gdk_monitor_get_manufacturer)
*
* The manufacturer name.
*/
props[PROP_MANUFACTURER] =
g_param_spec_string ("manufacturer", NULL, NULL,
NULL,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
/**
* GdkMonitor:model: (attributes org.gtk.Property.get=gdk_monitor_get_model)
*
* The model name.
*/
props[PROP_MODEL] =
g_param_spec_string ("model", NULL, NULL,
NULL,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
/**
* GdkMonitor:connector: (attributes org.gtk.Property.get=gdk_monitor_get_connector)
*
* The connector name.
*/
props[PROP_CONNECTOR] =
g_param_spec_string ("connector", NULL, NULL,
NULL,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
/**
* GdkMonitor:scale-factor: (attributes org.gtk.Property.get=gdk_monitor_get_scale_factor)
*
* The scale factor.
*/
props[PROP_SCALE_FACTOR] =
g_param_spec_int ("scale-factor", NULL, NULL,
0, G_MAXINT,
1,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
/**
* GdkMonitor:geometry: (attributes org.gtk.Property.get=gdk_monitor_get_geometry)
*
* The geometry of the monitor.
*/
props[PROP_GEOMETRY] =
g_param_spec_boxed ("geometry", NULL, NULL,
GDK_TYPE_RECTANGLE,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
/**
* GdkMonitor:width-mm: (attributes org.gtk.Property.get=gdk_monitor_get_width_mm)
*
* The width of the monitor, in millimeters.
*/
props[PROP_WIDTH_MM] =
g_param_spec_int ("width-mm", NULL, NULL,
0, G_MAXINT,
0,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
/**
* GdkMonitor:height-mm: (attributes org.gtk.Property.get=gdk_monitor_get_height_mm)
*
* The height of the monitor, in millimeters.
*/
props[PROP_HEIGHT_MM] =
g_param_spec_int ("height-mm", NULL, NULL,
0, G_MAXINT,
0,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
/**
* GdkMonitor:refresh-rate: (attributes org.gtk.Property.get=gdk_monitor_get_refresh_rate)
*
* The refresh rate, in milli-Hertz.
*/
props[PROP_REFRESH_RATE] =
g_param_spec_int ("refresh-rate", NULL, NULL,
0, G_MAXINT,
0,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
/**
* GdkMonitor:subpixel-layout: (attributes org.gtk.Property.get=gdk_monitor_get_subpixel_layout)
*
* The subpixel layout.
*/
props[PROP_SUBPIXEL_LAYOUT] =
g_param_spec_enum ("subpixel-layout", NULL, NULL,
GDK_TYPE_SUBPIXEL_LAYOUT,
GDK_SUBPIXEL_LAYOUT_UNKNOWN,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
/**
* GdkMonitor:valid: (attributes org.gtk.Property.get=gdk_monitor_is_valid)
*
* Whether the object is still valid.
*/
props[PROP_VALID] =
g_param_spec_boolean ("valid", NULL, NULL,
TRUE,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (object_class, LAST_PROP, props);
/**
* GdkMonitor::invalidate:
* @monitor: the object on which this signal was emitted
*
* Emitted when the output represented by @monitor gets disconnected.
*/
signals[INVALIDATE] = g_signal_new (g_intern_static_string ("invalidate"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_FIRST,
0,
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
}
/**
* gdk_monitor_get_display: (attributes org.gtk.Method.get_property=display)
* @monitor: a `GdkMonitor`
*
* Gets the display that this monitor belongs to.
*
* Returns: (transfer none): the display
*/
GdkDisplay *
gdk_monitor_get_display (GdkMonitor *monitor)
{
g_return_val_if_fail (GDK_IS_MONITOR (monitor), NULL);
return monitor->display;
}
/**
* gdk_monitor_get_geometry: (attributes org.gtk.Method.get_property=geometry)
* @monitor: a `GdkMonitor`
* @geometry: (out): a `GdkRectangle` to be filled with the monitor geometry
*
* Retrieves the size and position of the monitor within the
* display coordinate space.
*
* The returned geometry is in ”application pixels”, not in
* ”device pixels” (see [method@Gdk.Monitor.get_scale_factor]).
*/
void
gdk_monitor_get_geometry (GdkMonitor *monitor,
GdkRectangle *geometry)
{
g_return_if_fail (GDK_IS_MONITOR (monitor));
g_return_if_fail (geometry != NULL);
*geometry = monitor->geometry;
}
/**
* gdk_monitor_get_width_mm: (attributes org.gtk.Method.get_property=width-mm)
* @monitor: a `GdkMonitor`
*
* Gets the width in millimeters of the monitor.
*
* Returns: the physical width of the monitor
*/
int
gdk_monitor_get_width_mm (GdkMonitor *monitor)
{
g_return_val_if_fail (GDK_IS_MONITOR (monitor), 0);
return monitor->width_mm;
}
/**
* gdk_monitor_get_height_mm: (attributes org.gtk.Method.get_property=height-mm)
* @monitor: a `GdkMonitor`
*
* Gets the height in millimeters of the monitor.
*
* Returns: the physical height of the monitor
*/
int
gdk_monitor_get_height_mm (GdkMonitor *monitor)
{
g_return_val_if_fail (GDK_IS_MONITOR (monitor), 0);
return monitor->height_mm;
}
/**
* gdk_monitor_get_connector: (attributes org.gtk.Method.get_property=connector)
* @monitor: a `GdkMonitor`
*
* Gets the name of the monitor's connector, if available.
*
* These are strings such as "eDP-1", or "HDMI-2". They depend
* on software and hardware configuration, and should not be
* relied on as stable identifiers of a specific monitor.
*
* Returns: (transfer none) (nullable): the name of the connector
*/
const char *
gdk_monitor_get_connector (GdkMonitor *monitor)
{
g_return_val_if_fail (GDK_IS_MONITOR (monitor), NULL);
return monitor->connector;
}
/**
* gdk_monitor_get_manufacturer: (attributes org.gtk.Method.get_property=manufacturer)
* @monitor: a `GdkMonitor`
*
* Gets the name or PNP ID of the monitor's manufacturer.
*
* Note that this value might also vary depending on actual
* display backend.
*
* The PNP ID registry is located at
* [https://uefi.org/pnp_id_list](https://uefi.org/pnp_id_list).
*
* Returns: (transfer none) (nullable): the name of the manufacturer
*/
const char *
gdk_monitor_get_manufacturer (GdkMonitor *monitor)
{
g_return_val_if_fail (GDK_IS_MONITOR (monitor), NULL);
return monitor->manufacturer;
}
/**
* gdk_monitor_get_model: (attributes org.gtk.Method.get_property=model)
* @monitor: a `GdkMonitor`
*
* Gets the string identifying the monitor model, if available.
*
* Returns: (transfer none) (nullable): the monitor model
*/
const char *
gdk_monitor_get_model (GdkMonitor *monitor)
{
g_return_val_if_fail (GDK_IS_MONITOR (monitor), NULL);
return monitor->model;
}
/**
* gdk_monitor_get_scale_factor: (attributes org.gtk.Method.get_property=scale-factor)
* @monitor: a `GdkMonitor`
*
* Gets the internal scale factor that maps from monitor coordinates
* to device pixels.
*
* On traditional systems this is 1, but on very high density outputs
* it can be a higher value (often 2).
*
* This can be used if you want to create pixel based data for a
* particular monitor, but most of the time you’re drawing to a surface
* where it is better to use [method@Gdk.Surface.get_scale_factor] instead.
*
* Returns: the scale factor
*/
int
gdk_monitor_get_scale_factor (GdkMonitor *monitor)
{
g_return_val_if_fail (GDK_IS_MONITOR (monitor), 1);
return monitor->scale_factor;
}
/**
* gdk_monitor_get_refresh_rate: (attributes org.gtk.Method.get_property=refresh-rate)
* @monitor: a `GdkMonitor`
*
* Gets the refresh rate of the monitor, if available.
*
* The value is in milli-Hertz, so a refresh rate of 60Hz
* is returned as 60000.
*
* Returns: the refresh rate in milli-Hertz, or 0
*/
int
gdk_monitor_get_refresh_rate (GdkMonitor *monitor)
{
g_return_val_if_fail (GDK_IS_MONITOR (monitor), 0);
return monitor->refresh_rate;
}
/**
* gdk_monitor_get_subpixel_layout: (attributes org.gtk.Method.get_property=subpixel-layout)
* @monitor: a `GdkMonitor`
*
* Gets information about the layout of red, green and blue
* primaries for pixels.
*
* Returns: the subpixel layout
*/
GdkSubpixelLayout
gdk_monitor_get_subpixel_layout (GdkMonitor *monitor)
{
g_return_val_if_fail (GDK_IS_MONITOR (monitor), GDK_SUBPIXEL_LAYOUT_UNKNOWN);
return monitor->subpixel_layout;
}
GdkMonitor *
gdk_monitor_new (GdkDisplay *display)
{
return GDK_MONITOR (g_object_new (GDK_TYPE_MONITOR,
"display", display,
NULL));
}
void
gdk_monitor_set_manufacturer (GdkMonitor *monitor,
const char *manufacturer)
{
g_free (monitor->manufacturer);
monitor->manufacturer = g_strdup (manufacturer);
g_object_notify (G_OBJECT (monitor), "manufacturer");
}
void
gdk_monitor_set_model (GdkMonitor *monitor,
const char *model)
{
g_free (monitor->model);
monitor->model = g_strdup (model);
g_object_notify (G_OBJECT (monitor), "model");
}
void
gdk_monitor_set_connector (GdkMonitor *monitor,
const char *connector)
{
g_free (monitor->connector);
monitor->connector = g_strdup (connector);
g_object_notify (G_OBJECT (monitor), "connector");
}
void
gdk_monitor_set_geometry (GdkMonitor *monitor,
const GdkRectangle *geometry)
{
if (gdk_rectangle_equal (&monitor->geometry, geometry))
return;
monitor->geometry = *geometry;
g_object_notify (G_OBJECT (monitor), "geometry");
}
void
gdk_monitor_set_physical_size (GdkMonitor *monitor,
int width_mm,
int height_mm)
{
g_object_freeze_notify (G_OBJECT (monitor));
if (monitor->width_mm != width_mm)
{
monitor->width_mm = width_mm;
g_object_notify (G_OBJECT (monitor), "width-mm");
}
if (monitor->height_mm != height_mm)
{
monitor->height_mm = height_mm;
g_object_notify (G_OBJECT (monitor), "height-mm");
}
g_object_thaw_notify (G_OBJECT (monitor));
}
void
gdk_monitor_set_scale_factor (GdkMonitor *monitor,
int scale_factor)
{
if (monitor->scale_factor == scale_factor)
return;
monitor->scale_factor = scale_factor;
g_object_notify (G_OBJECT (monitor), "scale-factor");
}
void
gdk_monitor_set_refresh_rate (GdkMonitor *monitor,
int refresh_rate)
{
if (monitor->refresh_rate == refresh_rate)
return;
monitor->refresh_rate = refresh_rate;
g_object_notify (G_OBJECT (monitor), "refresh-rate");
}
void
gdk_monitor_set_subpixel_layout (GdkMonitor *monitor,
GdkSubpixelLayout subpixel_layout)
{
if (monitor->subpixel_layout == subpixel_layout)
return;
monitor->subpixel_layout = subpixel_layout;
g_object_notify (G_OBJECT (monitor), "subpixel-layout");
}
void
gdk_monitor_invalidate (GdkMonitor *monitor)
{
monitor->valid = FALSE;
g_object_notify (G_OBJECT (monitor), "valid");
g_signal_emit (monitor, signals[INVALIDATE], 0);
}
/**
* gdk_monitor_is_valid: (attributes org.gtk.Method.get_property=valid)
* @monitor: a `GdkMonitor`
*
* Returns %TRUE if the @monitor object corresponds to a
* physical monitor.
*
* The @monitor becomes invalid when the physical monitor
* is unplugged or removed.
*
* Returns: %TRUE if the object corresponds to a physical monitor
*/
gboolean
gdk_monitor_is_valid (GdkMonitor *monitor)
{
g_return_val_if_fail (GDK_IS_MONITOR (monitor), FALSE);
return monitor->valid;
}
/**
* gdk_monitor_get_description: (attributes org.gtk.Method.get_property=description)
* @monitor: a `GdkMonitor`
*
* Gets a string describing the monitor, if available.
*
* This can be used to identify a monitor in the UI.
*
* Returns: (transfer none) (nullable): the monitor description
*
* Since: 4.10
*/
const char *
gdk_monitor_get_description (GdkMonitor *monitor)
{
g_return_val_if_fail (GDK_IS_MONITOR (monitor), NULL);
return monitor->description;
}
void
gdk_monitor_set_description (GdkMonitor *monitor,
const char *description)
{
g_free (monitor->description);
monitor->description = g_strdup (description);
g_object_notify_by_pspec (G_OBJECT (monitor), props[PROP_DESCRIPTION]);
}