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82d1e5a6ee
Clutter should just require that the windowing system used by a backend adds a device to the stage when the device enters, and removes it from the stage when the device leaves; with this information, we can synthesize every crossing event and update the device state without other intervention from the backend-specific code. The generation of additional crossing events for actors that are covering the stage at the coordinates of the crossing event should be delegated to the event processing code. The x11 and win32 backends need to be modified to relay the enter and leave events from the windowing system.
437 lines
13 KiB
C
437 lines
13 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Copyright (C) 2009 Intel Corp.
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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, see <http://www.gnu.org/licenses/>.
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*
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* Author: Emmanuele Bassi <ebassi@linux.intel.com>
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*/
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/**
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* SECTION:clutter-device-manager
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* @short_description: Maintains the list of input devices
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*
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* #ClutterDeviceManager is a singleton object, owned by Clutter, which
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* maintains the list of #ClutterInputDevice<!-- -->s.
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*
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* Depending on the backend used by Clutter it is possible to use the
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* #ClutterDeviceManager::device-added and
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* #ClutterDeviceManager::device-removed to monitor addition and removal
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* of devices.
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*
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* #ClutterDeviceManager is available since Clutter 1.2
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "clutter-backend-private.h"
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#include "clutter-debug.h"
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#include "clutter-device-manager-private.h"
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#include "clutter-enum-types.h"
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#include "clutter-marshal.h"
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#include "clutter-private.h"
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#define CLUTTER_DEVICE_MANAGER_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), CLUTTER_TYPE_DEVICE_MANAGER, ClutterDeviceManagerPrivate))
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struct _ClutterDeviceManagerPrivate
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{
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/* back-pointer to the backend */
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ClutterBackend *backend;
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};
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enum
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{
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PROP_0,
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PROP_BACKEND,
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PROP_LAST
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};
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static GParamSpec *obj_props[PROP_LAST];
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enum
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{
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DEVICE_ADDED,
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DEVICE_REMOVED,
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LAST_SIGNAL
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};
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static guint manager_signals[LAST_SIGNAL] = { 0, };
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G_DEFINE_ABSTRACT_TYPE (ClutterDeviceManager,
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clutter_device_manager,
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G_TYPE_OBJECT);
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static void
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clutter_device_manager_set_property (GObject *gobject,
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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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ClutterDeviceManagerPrivate *priv = CLUTTER_DEVICE_MANAGER (gobject)->priv;
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switch (prop_id)
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{
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case PROP_BACKEND:
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priv->backend = 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 (gobject, prop_id, pspec);
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}
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}
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static void
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clutter_device_manager_get_property (GObject *gobject,
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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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ClutterDeviceManagerPrivate *priv = CLUTTER_DEVICE_MANAGER (gobject)->priv;
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switch (prop_id)
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{
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case PROP_BACKEND:
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g_value_set_object (value, priv->backend);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
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}
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}
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static void
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clutter_device_manager_class_init (ClutterDeviceManagerClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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g_type_class_add_private (klass, sizeof (ClutterDeviceManagerPrivate));
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obj_props[PROP_BACKEND] =
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g_param_spec_object ("backend",
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P_("Backend"),
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P_("The ClutterBackend of the device manager"),
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CLUTTER_TYPE_BACKEND,
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CLUTTER_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
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gobject_class->set_property = clutter_device_manager_set_property;
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gobject_class->get_property = clutter_device_manager_get_property;
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_clutter_object_class_install_properties (gobject_class,
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PROP_LAST,
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obj_props);
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/**
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* ClutterDeviceManager::device-added:
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* @manager: the #ClutterDeviceManager that emitted the signal
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* @device: the newly added #ClutterInputDevice
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*
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* The ::device-added signal is emitted each time a device has been
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* added to the #ClutterDeviceManager
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*
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* Since: 1.2
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*/
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manager_signals[DEVICE_ADDED] =
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g_signal_new (I_("device-added"),
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST,
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0,
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NULL, NULL,
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_clutter_marshal_VOID__OBJECT,
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G_TYPE_NONE, 1,
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CLUTTER_TYPE_INPUT_DEVICE);
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/**
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* ClutterDeviceManager::device-removed:
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* @manager: the #ClutterDeviceManager that emitted the signal
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* @device: the removed #ClutterInputDevice
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*
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* The ::device-removed signal is emitted each time a device has been
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* removed from the #ClutterDeviceManager
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*
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* Since: 1.2
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*/
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manager_signals[DEVICE_REMOVED] =
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g_signal_new (I_("device-removed"),
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST,
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0,
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NULL, NULL,
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_clutter_marshal_VOID__OBJECT,
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G_TYPE_NONE, 1,
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CLUTTER_TYPE_INPUT_DEVICE);
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}
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static void
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clutter_device_manager_init (ClutterDeviceManager *self)
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{
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self->priv = CLUTTER_DEVICE_MANAGER_GET_PRIVATE (self);
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}
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/**
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* clutter_device_manager_get_default:
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*
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* Retrieves the device manager singleton
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*
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* Return value: (transfer none): the #ClutterDeviceManager singleton.
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* The returned instance is owned by Clutter and it should not be
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* modified or freed
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*
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* Since: 1.2
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*/
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ClutterDeviceManager *
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clutter_device_manager_get_default (void)
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{
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ClutterBackendClass *klass;
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klass = CLUTTER_BACKEND_GET_CLASS (clutter_get_default_backend ());
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g_assert (klass->get_device_manager != NULL);
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return klass->get_device_manager (clutter_get_default_backend ());
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}
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/**
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* clutter_device_manager_list_devices:
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* @device_manager: a #ClutterDeviceManager
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*
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* Lists all currently registered input devices
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*
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* Return value: (transfer container) (element-type Clutter.InputDevice):
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* a newly allocated list of #ClutterInputDevice objects. Use
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* g_slist_free() to deallocate it when done
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*
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* Since: 1.2
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*/
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GSList *
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clutter_device_manager_list_devices (ClutterDeviceManager *device_manager)
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{
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const GSList *devices;
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g_return_val_if_fail (CLUTTER_IS_DEVICE_MANAGER (device_manager), NULL);
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devices = clutter_device_manager_peek_devices (device_manager);
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return g_slist_copy ((GSList *) devices);
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}
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/**
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* clutter_device_manager_peek_devices:
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* @device_manager: a #ClutterDeviceManager
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*
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* Lists all currently registered input devices
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*
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* Return value: (transfer none) (element-type Clutter.InputDevice):
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* a pointer to the internal list of #ClutterInputDevice objects. The
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* returned list is owned by the #ClutterDeviceManager and should never
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* be modified or freed
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*
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* Since: 1.2
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*/
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const GSList *
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clutter_device_manager_peek_devices (ClutterDeviceManager *device_manager)
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{
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ClutterDeviceManagerClass *manager_class;
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g_return_val_if_fail (CLUTTER_IS_DEVICE_MANAGER (device_manager), NULL);
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manager_class = CLUTTER_DEVICE_MANAGER_GET_CLASS (device_manager);
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return manager_class->get_devices (device_manager);
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}
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/**
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* clutter_device_manager_get_device:
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* @device_manager: a #ClutterDeviceManager
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* @device_id: the integer id of a device
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*
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* Retrieves the #ClutterInputDevice with the given @device_id
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*
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* Return value: (transfer none): a #ClutterInputDevice or %NULL. The
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* returned device is owned by the #ClutterDeviceManager and should
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* never be modified or freed
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*
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* Since: 1.2
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*/
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ClutterInputDevice *
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clutter_device_manager_get_device (ClutterDeviceManager *device_manager,
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gint device_id)
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{
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ClutterDeviceManagerClass *manager_class;
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g_return_val_if_fail (CLUTTER_IS_DEVICE_MANAGER (device_manager), NULL);
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manager_class = CLUTTER_DEVICE_MANAGER_GET_CLASS (device_manager);
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return manager_class->get_device (device_manager, device_id);
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}
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/**
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* clutter_device_manager_get_core_device:
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* @device_manager: a #ClutterDeviceManager
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* @device_type: the type of the core device
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*
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* Retrieves the core #ClutterInputDevice of type @device_type
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*
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* Core devices are devices created automatically by the default
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* Clutter backend
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*
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* Return value: (transfer none): a #ClutterInputDevice or %NULL. The
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* returned device is owned by the #ClutterDeviceManager and should
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* not be modified or freed
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*
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* Since: 1.2
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*/
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ClutterInputDevice *
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clutter_device_manager_get_core_device (ClutterDeviceManager *device_manager,
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ClutterInputDeviceType device_type)
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{
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ClutterDeviceManagerClass *manager_class;
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g_return_val_if_fail (CLUTTER_IS_DEVICE_MANAGER (device_manager), NULL);
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manager_class = CLUTTER_DEVICE_MANAGER_GET_CLASS (device_manager);
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return manager_class->get_core_device (device_manager, device_type);
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}
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void
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_clutter_device_manager_select_stage_events (ClutterDeviceManager *device_manager,
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ClutterStage *stage,
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gint event_flags)
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{
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ClutterDeviceManagerClass *manager_class;
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const GSList *devices, *d;
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g_return_if_fail (CLUTTER_IS_DEVICE_MANAGER (device_manager));
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manager_class = CLUTTER_DEVICE_MANAGER_GET_CLASS (device_manager);
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devices = manager_class->get_devices (device_manager);
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for (d = devices; d != NULL; d = d->next)
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{
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ClutterInputDevice *device = d->data;
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_clutter_input_device_select_stage_events (device, stage, event_flags);
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}
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}
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/*
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* _clutter_device_manager_add_device:
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* @device_manager: a #ClutterDeviceManager
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* @device: a #ClutterInputDevice
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*
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* Adds @device to the list of #ClutterInputDevice<!-- -->s maintained
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* by @device_manager
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*
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* The reference count of @device is not increased
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*
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* The #ClutterDeviceManager::device-added signal is emitted after
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* adding @device to the list
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*/
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void
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_clutter_device_manager_add_device (ClutterDeviceManager *device_manager,
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ClutterInputDevice *device)
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{
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ClutterDeviceManagerClass *manager_class;
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g_return_if_fail (CLUTTER_IS_DEVICE_MANAGER (device_manager));
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manager_class = CLUTTER_DEVICE_MANAGER_GET_CLASS (device_manager);
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g_assert (manager_class->add_device != NULL);
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manager_class->add_device (device_manager, device);
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g_signal_emit (device_manager, manager_signals[DEVICE_ADDED], 0, device);
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}
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/*
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* _clutter_device_manager_remove_device:
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* @device_manager: a #ClutterDeviceManager
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* @device: a #ClutterInputDevice
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*
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* Removes @device from the list of #ClutterInputDevice<!-- -->s
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* maintained by @device_manager
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*
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* The reference count of @device is not decreased
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*
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* The #ClutterDeviceManager::device-removed signal is emitted after
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* removing @device from the list
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*/
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void
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_clutter_device_manager_remove_device (ClutterDeviceManager *device_manager,
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ClutterInputDevice *device)
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{
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ClutterDeviceManagerClass *manager_class;
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g_return_if_fail (CLUTTER_IS_DEVICE_MANAGER (device_manager));
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manager_class = CLUTTER_DEVICE_MANAGER_GET_CLASS (device_manager);
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g_assert (manager_class->remove_device != NULL);
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manager_class->remove_device (device_manager, device);
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g_signal_emit (device_manager, manager_signals[DEVICE_REMOVED], 0, device);
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}
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/*
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* _clutter_device_manager_update_devices:
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* @device_manager: a #ClutterDeviceManager
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*
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* Updates every #ClutterInputDevice handled by @device_manager
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* by performing a pick paint at the coordinates of each pointer
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* device
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*/
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void
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_clutter_device_manager_update_devices (ClutterDeviceManager *device_manager)
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{
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const GSList *d;
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/* the user disabled motion events delivery on actors; we
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* don't perform any picking since the source of the events
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* will always be set to be the stage
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*/
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if (!clutter_get_motion_events_enabled ())
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return;
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for (d = clutter_device_manager_peek_devices (device_manager);
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d != NULL;
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d = d->next)
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{
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ClutterInputDevice *device = d->data;
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ClutterInputDeviceType device_type;
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/* we only care about pointer devices */
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device_type = clutter_input_device_get_device_type (device);
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if (device_type != CLUTTER_POINTER_DEVICE)
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continue;
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/* out of stage */
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if (device->stage == NULL)
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continue;
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_clutter_input_device_update (device, TRUE);
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}
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}
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ClutterBackend *
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_clutter_device_manager_get_backend (ClutterDeviceManager *manager)
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{
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g_return_val_if_fail (CLUTTER_IS_DEVICE_MANAGER (manager), NULL);
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return manager->priv->backend;
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}
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