gtk/gdk/gdkseat.c

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/* GDK - The GIMP Drawing Kit
* Copyright (C) 2015 Red Hat
*
* 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/>.
*
* Author: Carlos Garnacho <carlosg@gnome.org>
*/
#include "config.h"
#include <glib-object.h>
#include "gdkdisplay.h"
#include "gdkdevice.h"
#include "gdkseatprivate.h"
#include "gdkdeviceprivate.h"
#include "gdkintl.h"
/**
* SECTION:gdkseat
* @Short_description: Object representing an user seat
* @Title: GdkSeat
* @See_also: #GdkDisplay, #GdkDevice
*
* The #GdkSeat object represents a collection of input devices
* that belong to an user.
*/
typedef struct _GdkSeatPrivate GdkSeatPrivate;
struct _GdkSeatPrivate
{
GdkDisplay *display;
};
enum {
DEVICE_ADDED,
DEVICE_REMOVED,
N_SIGNALS
};
enum {
PROP_0,
PROP_DISPLAY,
N_PROPS
};
static guint signals[N_SIGNALS] = { 0 };
static GParamSpec *props[N_PROPS] = { NULL };
G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GdkSeat, gdk_seat, G_TYPE_OBJECT)
static void
gdk_seat_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GdkSeatPrivate *priv = gdk_seat_get_instance_private (GDK_SEAT (object));
switch (prop_id)
{
case PROP_DISPLAY:
priv->display = g_value_get_object (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gdk_seat_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GdkSeatPrivate *priv = gdk_seat_get_instance_private (GDK_SEAT (object));
switch (prop_id)
{
case PROP_DISPLAY:
g_value_set_object (value, priv->display);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gdk_seat_class_init (GdkSeatClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->set_property = gdk_seat_set_property;
object_class->get_property = gdk_seat_get_property;
/**
* GdkSeat::device-added:
* @seat: the object on which the signal is emitted
* @device: the newly added #GdkDevice.
*
* The ::device-added signal is emitted either when a new input
* device is related to this seat.
*
* Since: 3.20
*/
signals [DEVICE_ADDED] =
g_signal_new (g_intern_static_string ("device-added"),
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GdkSeatClass, device_added),
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
GDK_TYPE_DEVICE);
/**
* GdkSeat::device-removed:
* @seat: the object on which the signal is emitted
* @device: the just removed #GdkDevice.
*
* The ::device-removed signal is emitted either when an
* input device is removed (e.g. unplugged).
*
* Since: 3.20
*/
signals [DEVICE_REMOVED] =
g_signal_new (g_intern_static_string ("device-removed"),
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GdkSeatClass, device_removed),
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
GDK_TYPE_DEVICE);
/**
* GdkSeat:display:
*
* #GdkDisplay of this seat.
*
* Since: 3.20
*/
props[PROP_DISPLAY] =
g_param_spec_object ("display",
P_("Display"),
P_("Display"),
GDK_TYPE_DISPLAY,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (object_class, N_PROPS, props);
}
static void
gdk_seat_init (GdkSeat *seat)
{
}
/**
* gdk_seat_get_capabilities:
* @seat: a #GdkSeat
*
* Returns the capabilities this #GdkSeat currently has.
*
* Returns: the seat capabilities
*
* Since: 3.20
**/
GdkSeatCapabilities
gdk_seat_get_capabilities (GdkSeat *seat)
{
GdkSeatClass *seat_class;
g_return_val_if_fail (GDK_IS_SEAT (seat), GDK_SEAT_CAPABILITY_NONE);
seat_class = GDK_SEAT_GET_CLASS (seat);
return seat_class->get_capabilities (seat);
}
/**
* gdk_seat_grab:
* @seat: a #GdkSeat
* @window: the #GdkWindow which will own the grab
* @capabilities: capabilities that will be grabbed
* @owner_events: if %FALSE then all device events are reported with respect to
* @window and are only reported if selected by @event_mask. If
* %TRUE then pointer events for this application are reported
* as normal, but pointer events outside this application are
* reported with respect to @window and only if selected by
* @event_mask. In either mode, unreported events are discarded.
* @cursor: (nullable): the cursor to display while the grab is active. If
* this is %NULL then the normal cursors are used for
* @window and its descendants, and the cursor for @window is used
* elsewhere.
* @event: (nullable): the event that is triggering the grab, or %NULL if none
* is available.
* @prepare_func: (nullable) (scope call) (closure prepare_func_data): function to prepare the window to be
* grabbed, it can be %NULL if @window is visible before this call.
* @prepare_func_data: user data to pass to @prepare_func
*
* Grabs the seat so that all events corresponding to the given @capabilities
* are passed to this application until the seat is ungrabbed with gdk_seat_ungrab(),
* or the window becomes hidden. This overrides any previous grab on the
* seat by this client.
*
* As a rule of thumb, if a grab is desired over %GDK_SEAT_CAPABILITY_POINTER,
* all other "pointing" capabilities (eg. %GDK_SEAT_CAPABILITY_TOUCH) should
* be grabbed too, so the user is able to interact with all of those while
* the grab holds, you should thus use %GDK_SEAT_CAPABILITY_ALL_POINTING most
* commonly.
*
* Grabs are used for operations which need complete control over the
* events corresponding to the given capabilities. For example in GTK+ this
* is used for Drag and Drop operations, popup menus and such.
*
* Note that if the event mask of a #GdkWindow has selected both button press
* and button release events, or touch begin and touch end, then a press event
* will cause an automatic grab until the button is released, equivalent to a
* grab on the window with @owner_events set to %TRUE. This performed as most
* applications expect to receive presses and releases in pairs.
*
* If you set up anything at the time you take the grab that needs to be
* cleaned up when the grab ends, you should handle the #GdkEventGrabBroken
* events that are emitted when the grab ends unvoluntarily.
*
* Returns: %GDK_GRAB_SUCCESS if the grab was successful.
*
* Since: 3.20
**/
GdkGrabStatus
gdk_seat_grab (GdkSeat *seat,
GdkWindow *window,
GdkSeatCapabilities capabilities,
gboolean owner_events,
GdkCursor *cursor,
const GdkEvent *event,
GdkSeatGrabPrepareFunc prepare_func,
gpointer prepare_func_data)
{
GdkSeatClass *seat_class;
g_return_val_if_fail (GDK_IS_SEAT (seat), GDK_GRAB_FAILED);
g_return_val_if_fail (GDK_IS_WINDOW (window), GDK_GRAB_FAILED);
capabilities &= GDK_SEAT_CAPABILITY_ALL;
g_return_val_if_fail (capabilities != GDK_SEAT_CAPABILITY_NONE, GDK_GRAB_FAILED);
seat_class = GDK_SEAT_GET_CLASS (seat);
return seat_class->grab (seat, window, capabilities, owner_events, cursor,
event, prepare_func, prepare_func_data);
}
/**
* gdk_seat_ungrab:
* @seat: a #GdkSeat
*
* Releases a grab added through gdk_seat_grab().
*
* Since: 3.20
**/
void
gdk_seat_ungrab (GdkSeat *seat)
{
GdkSeatClass *seat_class;
g_return_if_fail (GDK_IS_SEAT (seat));
seat_class = GDK_SEAT_GET_CLASS (seat);
seat_class->ungrab (seat);
}
/**
* gdk_seat_get_slaves:
* @seat: a #GdkSeat
* @capabilities: capabilities to get devices for
*
* Returns the slave devices that match the given capabilities.
*
* Returns: (transfer container) (element-type GdkDevice): A list of #GdkDevices. The list
* must be freed with g_list_free(), the elements are owned
* by GDK and must not be freed.
*
* Since: 3.20
**/
GList *
gdk_seat_get_slaves (GdkSeat *seat,
GdkSeatCapabilities capabilities)
{
GdkSeatClass *seat_class;
g_return_val_if_fail (GDK_IS_SEAT (seat), NULL);
seat_class = GDK_SEAT_GET_CLASS (seat);
return seat_class->get_slaves (seat, capabilities);
}
/**
* gdk_seat_get_pointer:
* @seat: a #GdkSeat
*
* Returns the master device that routes pointer events.
*
* Returns: (transfer none) (nullable): a master #GdkDevice with pointer
* capabilities. This object is owned by GTK+ and must not be
* freed.
*
* Since: 3.20
**/
GdkDevice *
gdk_seat_get_pointer (GdkSeat *seat)
{
GdkSeatClass *seat_class;
g_return_val_if_fail (GDK_IS_SEAT (seat), NULL);
seat_class = GDK_SEAT_GET_CLASS (seat);
return seat_class->get_master (seat, GDK_SEAT_CAPABILITY_POINTER);
}
/**
* gdk_seat_get_keyboard:
* @seat: a #GdkSeat
*
* Returns the master device that routes keyboard events.
*
* Returns: (transfer none) (nullable): a master #GdkDevice with keyboard
* capabilities. This object is owned by GTK+ and must not be
* freed.
*
* Since: 3.20
**/
GdkDevice *
gdk_seat_get_keyboard (GdkSeat *seat)
{
GdkSeatClass *seat_class;
g_return_val_if_fail (GDK_IS_SEAT (seat), NULL);
seat_class = GDK_SEAT_GET_CLASS (seat);
return seat_class->get_master (seat, GDK_SEAT_CAPABILITY_KEYBOARD);
}
void
gdk_seat_device_added (GdkSeat *seat,
GdkDevice *device)
{
gdk_device_set_seat (device, seat);
g_signal_emit (seat, signals[DEVICE_ADDED], 0, device);
}
void
gdk_seat_device_removed (GdkSeat *seat,
GdkDevice *device)
{
gdk_device_set_seat (device, NULL);
g_signal_emit (seat, signals[DEVICE_REMOVED], 0, device);
}
/**
* gdk_seat_get_display:
* @seat: a #GdkSeat
*
* Returns the #GdkDisplay this seat belongs to.
*
* Returns: (transfer none): a #GdkDisplay. This memory is owned by GTK+ and
* must not be freed.
**/
GdkDisplay *
gdk_seat_get_display (GdkSeat *seat)
{
GdkSeatPrivate *priv = gdk_seat_get_instance_private (seat);
g_return_val_if_fail (GDK_IS_SEAT (seat), NULL);
return priv->display;
}