31419f2026
The last paragraph still seems to be out of place though, as if it was a previous attempt at an overview or part of some older text elsewhere. This overuses the passive too.
324 lines
12 KiB
C
324 lines
12 KiB
C
/* GDK - The GIMP Drawing Kit
|
|
* Copyright (C) 2009 Carlos Garnacho <carlosg@gnome.org>
|
|
*
|
|
* 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, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include "gdkdevicemanagerprivate.h"
|
|
#include "gdkdisplay.h"
|
|
#include "gdkintl.h"
|
|
|
|
|
|
/**
|
|
* SECTION:gdkdevicemanager
|
|
* @Short_description: Functions for handling input devices
|
|
* @Title: GdkDeviceManager
|
|
* @See_also: #GdkDevice, #GdkEvent
|
|
*
|
|
* In addition to a single pointer and keyboard for user interface input,
|
|
* GDK contains support for a variety of input devices, including graphics
|
|
* tablets, touchscreens and multiple pointers/keyboards interacting
|
|
* simultaneously with the user interface. Under X, the support for multiple
|
|
* input devices is done through the <firstterm>XInput 2</firstterm> extension,
|
|
* which also supports additional features such as sub-pixel positioning
|
|
* information and additional device-dependent information.
|
|
*
|
|
* By default, and if the platform supports it, GDK is aware of multiple
|
|
* keyboard/pointer pairs and multitouch devices, this behavior can be
|
|
* changed by calling gdk_disable_multidevice() before gdk_display_open(),
|
|
* although there would rarely be a reason to do that. For a widget or
|
|
* window to be dealt as multipointer aware,
|
|
* gdk_window_set_support_multidevice() or
|
|
* gtk_widget_set_support_multidevice() must have been called on it.
|
|
*
|
|
* Conceptually, in multidevice mode there are 2 device types. Virtual
|
|
* devices (or master devices) are represented by the pointer cursors
|
|
* and keyboard foci that are seen on the screen. Physical devices (or
|
|
* slave devices) represent the hardware that is controlling the virtual
|
|
* devices, and thus have no visible cursor on the screen.
|
|
*
|
|
* Virtual devices are always paired, so there is a keyboard device for every
|
|
* pointer device. Associations between devices may be inspected through
|
|
* gdk_device_get_associated_device().
|
|
*
|
|
* There may be several virtual devices, and several physical devices could
|
|
* be controlling each of these virtual devices. Physical devices may also
|
|
* be "floating", which means they are not attached to any virtual device.
|
|
*
|
|
* By default, GDK will automatically listen for events coming from all
|
|
* master devices, setting the #GdkDevice for all events coming from input
|
|
* devices,
|
|
* <footnote>
|
|
* Events containing device information are #GDK_MOTION_NOTIFY,
|
|
* #GDK_BUTTON_PRESS, #GDK_2BUTTON_PRESS, #GDK_3BUTTON_PRESS,
|
|
* #GDK_BUTTON_RELEASE, #GDK_SCROLL, #GDK_KEY_PRESS, #GDK_KEY_RELEASE,
|
|
* #GDK_ENTER_NOTIFY, #GDK_LEAVE_NOTIFY, #GDK_FOCUS_CHANGE,
|
|
* #GDK_PROXIMITY_IN, #GDK_PROXIMITY_OUT, #GDK_DRAG_ENTER, #GDK_DRAG_LEAVE,
|
|
* #GDK_DRAG_MOTION, #GDK_DRAG_STATUS, #GDK_DROP_START, #GDK_DROP_FINISHED
|
|
* and #GDK_GRAB_BROKEN.
|
|
* </footnote>
|
|
* Although gdk_window_set_support_multidevice() must be called on
|
|
* #GdkWindows in order to support additional features of multiple pointer
|
|
* interaction, such as multiple per-device enter/leave events, the default
|
|
* setting will emit just one enter/leave event pair for all devices on the
|
|
* window. See gdk_window_set_support_multidevice() documentation for more
|
|
* information.
|
|
*
|
|
* In order to listen for events coming from other than a virtual device,
|
|
* gdk_window_set_device_events() must be called. Generally, this function
|
|
* can be used to modify the event mask for any given device.
|
|
*
|
|
* Input devices may also provide additional information besides X/Y.
|
|
* For example, graphics tablets may also provide pressure and X/Y tilt
|
|
* information. This information is device-dependent, and may be
|
|
* queried through gdk_device_get_axis(). In multidevice mode, virtual
|
|
* devices will change axes in order to always represent the physical
|
|
* device that is routing events through it. Whenever the physical device
|
|
* changes, the #GdkDevice:n-axes property will be notified, and
|
|
* gdk_device_list_axes() will return the new device axes.
|
|
*
|
|
* Devices may also have associated <firstterm>keys</firstterm> or
|
|
* macro buttons. Such keys can be globally set to map into normal X
|
|
* keyboard events. The mapping is set using gdk_device_set_key().
|
|
*
|
|
* In order to query the device hierarchy and be aware of changes in the
|
|
* device hierarchy (such as virtual devices being created or removed, or
|
|
* physical devices being plugged or unplugged), GDK provides
|
|
* #GdkDeviceManager. On X11, multidevice support is implemented through
|
|
* XInput 2. Unless gdk_disable_multidevice() is called, the XInput 2.x
|
|
* #GdkDeviceManager implementation will be used as the input source. Otherwise
|
|
* either the core or XInput 1.x implementations will be used.
|
|
*/
|
|
|
|
static void gdk_device_manager_set_property (GObject *object,
|
|
guint prop_id,
|
|
const GValue *value,
|
|
GParamSpec *pspec);
|
|
static void gdk_device_manager_get_property (GObject *object,
|
|
guint prop_id,
|
|
GValue *value,
|
|
GParamSpec *pspec);
|
|
|
|
|
|
G_DEFINE_ABSTRACT_TYPE (GdkDeviceManager, gdk_device_manager, G_TYPE_OBJECT)
|
|
|
|
enum {
|
|
PROP_0,
|
|
PROP_DISPLAY
|
|
};
|
|
|
|
enum {
|
|
DEVICE_ADDED,
|
|
DEVICE_REMOVED,
|
|
DEVICE_CHANGED,
|
|
LAST_SIGNAL
|
|
};
|
|
|
|
static guint signals [LAST_SIGNAL] = { 0 };
|
|
|
|
|
|
static void
|
|
gdk_device_manager_class_init (GdkDeviceManagerClass *klass)
|
|
{
|
|
GObjectClass *object_class = G_OBJECT_CLASS (klass);
|
|
|
|
object_class->set_property = gdk_device_manager_set_property;
|
|
object_class->get_property = gdk_device_manager_get_property;
|
|
|
|
g_object_class_install_property (object_class,
|
|
PROP_DISPLAY,
|
|
g_param_spec_object ("display",
|
|
P_("Display"),
|
|
P_("Display for the device manager"),
|
|
GDK_TYPE_DISPLAY,
|
|
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
|
|
G_PARAM_STATIC_STRINGS));
|
|
|
|
/**
|
|
* GdkDeviceManager::device-added:
|
|
* @device_manager: the object on which the signal is emitted
|
|
* @device: the newly added #GdkDevice.
|
|
*
|
|
* The ::device-added signal is emitted either when a new master
|
|
* pointer is created, or when a slave (Hardware) input device
|
|
* is plugged in.
|
|
*/
|
|
signals [DEVICE_ADDED] =
|
|
g_signal_new (g_intern_static_string ("device-added"),
|
|
G_TYPE_FROM_CLASS (klass),
|
|
G_SIGNAL_RUN_LAST,
|
|
G_STRUCT_OFFSET (GdkDeviceManagerClass, device_added),
|
|
NULL, NULL,
|
|
g_cclosure_marshal_VOID__OBJECT,
|
|
G_TYPE_NONE, 1,
|
|
GDK_TYPE_DEVICE);
|
|
|
|
/**
|
|
* GdkDeviceManager::device-removed:
|
|
* @device_manager: the object on which the signal is emitted
|
|
* @device: the just removed #GdkDevice.
|
|
*
|
|
* The ::device-removed signal is emitted either when a master
|
|
* pointer is removed, or when a slave (Hardware) input device
|
|
* is unplugged.
|
|
*/
|
|
signals [DEVICE_REMOVED] =
|
|
g_signal_new (g_intern_static_string ("device-removed"),
|
|
G_TYPE_FROM_CLASS (klass),
|
|
G_SIGNAL_RUN_LAST,
|
|
G_STRUCT_OFFSET (GdkDeviceManagerClass, device_removed),
|
|
NULL, NULL,
|
|
g_cclosure_marshal_VOID__OBJECT,
|
|
G_TYPE_NONE, 1,
|
|
GDK_TYPE_DEVICE);
|
|
|
|
/**
|
|
* GdkDeviceManager::device-changed:
|
|
* @device_manager: the object on which the signal is emitted
|
|
* @device: the #GdkDevice that changed.
|
|
*
|
|
* The ::device-changed signal is emitted whenever a device
|
|
* has changed in the hierarchy, either slave devices being
|
|
* disconnected from their master device or connected to
|
|
* another one, or master devices being added or removed
|
|
* a slave device.
|
|
*
|
|
* If a slave device is detached from all master devices
|
|
* (gdk_device_get_associated_device() returns %NULL), its
|
|
* #GdkDeviceType will change to %GDK_DEVICE_TYPE_FLOATING,
|
|
* if it's attached, it will change to %GDK_DEVICE_TYPE_SLAVE.
|
|
*/
|
|
signals [DEVICE_CHANGED] =
|
|
g_signal_new (g_intern_static_string ("device-changed"),
|
|
G_TYPE_FROM_CLASS (klass),
|
|
G_SIGNAL_RUN_LAST,
|
|
G_STRUCT_OFFSET (GdkDeviceManagerClass, device_changed),
|
|
NULL, NULL,
|
|
g_cclosure_marshal_VOID__OBJECT,
|
|
G_TYPE_NONE, 1,
|
|
GDK_TYPE_DEVICE);
|
|
}
|
|
|
|
static void
|
|
gdk_device_manager_init (GdkDeviceManager *device_manager)
|
|
{
|
|
}
|
|
|
|
static void
|
|
gdk_device_manager_set_property (GObject *object,
|
|
guint prop_id,
|
|
const GValue *value,
|
|
GParamSpec *pspec)
|
|
{
|
|
switch (prop_id)
|
|
{
|
|
case PROP_DISPLAY:
|
|
GDK_DEVICE_MANAGER (object)->display = g_value_get_object (value);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gdk_device_manager_get_property (GObject *object,
|
|
guint prop_id,
|
|
GValue *value,
|
|
GParamSpec *pspec)
|
|
{
|
|
|
|
switch (prop_id)
|
|
{
|
|
case PROP_DISPLAY:
|
|
g_value_set_object (value, GDK_DEVICE_MANAGER (object)->display);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gdk_device_manager_get_display:
|
|
* @device_manager: a #GdkDeviceManager
|
|
*
|
|
* Gets the #GdkDisplay associated to @device_manager.
|
|
*
|
|
* Returns: (transfer none): the #GdkDisplay to which @device_manager is
|
|
* associated to, or #NULL. This memory is owned by GDK and
|
|
* must not be freed or unreferenced.
|
|
*
|
|
* Since: 3.0
|
|
**/
|
|
GdkDisplay *
|
|
gdk_device_manager_get_display (GdkDeviceManager *device_manager)
|
|
{
|
|
g_return_val_if_fail (GDK_IS_DEVICE_MANAGER (device_manager), NULL);
|
|
|
|
return device_manager->display;
|
|
}
|
|
|
|
/**
|
|
* gdk_device_manager_list_devices:
|
|
* @device_manager: a #GdkDeviceManager
|
|
* @type: device type to get.
|
|
*
|
|
* Returns the list of devices of type @type currently attached to
|
|
* @device_manager.
|
|
*
|
|
* Returns: (transfer container) (element-type Gdk.Device): a list of
|
|
* #GdkDevice<!-- -->s. The returned list must be
|
|
* freed with g_list_free (). The list elements are owned by
|
|
* GTK+ and must not be freed or unreffed.
|
|
*
|
|
* Since: 3.0
|
|
**/
|
|
GList *
|
|
gdk_device_manager_list_devices (GdkDeviceManager *device_manager,
|
|
GdkDeviceType type)
|
|
{
|
|
g_return_val_if_fail (GDK_IS_DEVICE_MANAGER (device_manager), NULL);
|
|
|
|
return GDK_DEVICE_MANAGER_GET_CLASS (device_manager)->list_devices (device_manager, type);
|
|
}
|
|
|
|
/**
|
|
* gdk_device_manager_get_client_pointer:
|
|
* @device_manager: a #GdkDeviceManager
|
|
*
|
|
* Returns the client pointer, that is, the master pointer that acts as the core pointer
|
|
* for this application. In X11, window managers may change this depending on the interaction
|
|
* pattern under the presence of several pointers.
|
|
*
|
|
* You should use this function sheldomly, only in code that isn't triggered by a #GdkEvent
|
|
* and there aren't other means to get a meaningful #GdkDevice to operate on.
|
|
*
|
|
* Returns: (transfer none): The client pointer. This memory is
|
|
* owned by GDK and must not be freed or unreferenced.
|
|
*
|
|
* Since: 3.0
|
|
**/
|
|
GdkDevice *
|
|
gdk_device_manager_get_client_pointer (GdkDeviceManager *device_manager)
|
|
{
|
|
g_return_val_if_fail (GDK_IS_DEVICE_MANAGER (device_manager), NULL);
|
|
|
|
return GDK_DEVICE_MANAGER_GET_CLASS (device_manager)->get_client_pointer (device_manager);
|
|
}
|