forked from AuroraMiddleware/gtk
be7de347bf
The xi2 device manager now handles slaves being detached and/or attached to a master. gdk_device_list_slaves() has been added so it is possible to know how slaves relate with masters. The other backends (X11 and not) don't neeed to to anything special here since their hierarchy is fully flat.
333 lines
13 KiB
C
333 lines
13 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 "gdkdevicemanager.h"
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#include "gdkintl.h"
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#include "gdkinternals.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. If
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* gdk_enable_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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struct _GdkDeviceManagerPrivate
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{
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GdkDisplay *display;
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};
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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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g_type_class_add_private (object_class, sizeof (GdkDeviceManagerPrivate));
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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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GdkDeviceManagerPrivate *priv;
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device_manager->priv = priv = G_TYPE_INSTANCE_GET_PRIVATE (device_manager,
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GDK_TYPE_DEVICE_MANAGER,
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GdkDeviceManagerPrivate);
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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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GdkDeviceManagerPrivate *priv;
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priv = GDK_DEVICE_MANAGER (object)->priv;
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switch (prop_id)
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{
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case PROP_DISPLAY:
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priv->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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GdkDeviceManagerPrivate *priv;
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priv = GDK_DEVICE_MANAGER (object)->priv;
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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, priv->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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GdkDeviceManagerPrivate *priv;
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g_return_val_if_fail (GDK_IS_DEVICE_MANAGER (device_manager), NULL);
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priv = device_manager->priv;
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return priv->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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