/* GDK - The GIMP Drawing Kit * Copyright (C) 2009 Carlos Garnacho * * 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 XInput 2 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 be rarely 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 has no visible cursor on the screen. * * Virtual devices are always paired, 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, * * 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. * * although gdk_window_set_support_multidevice() has to 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 keys 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 input source, else * 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 * #GdkDevices. 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); }