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