297 lines
8.2 KiB
C
297 lines
8.2 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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* #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-debug.h"
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#include "clutter-device-manager.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_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CLUTTER_TYPE_DEVICE_MANAGER, ClutterDeviceManagerClass))
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#define CLUTTER_IS_DEVICE_MANAGER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CLUTTER_TYPE_DEVICE_MANAGER))
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#define CLUTTER_DEVICE_MANAGER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), CLUTTER_TYPE_DEVICE_MANAGER, ClutterDeviceManagerClass))
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typedef struct _ClutterDeviceManagerClass ClutterDeviceManagerClass;
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struct _ClutterDeviceManagerClass
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{
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GObjectClass parent_instance;
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};
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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 ClutterDeviceManager *default_manager = NULL;
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static guint manager_signals[LAST_SIGNAL] = { 0, };
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G_DEFINE_TYPE (ClutterDeviceManager, clutter_device_manager, G_TYPE_OBJECT);
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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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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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G_TYPE_POINTER);
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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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G_TYPE_POINTER);
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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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}
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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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if (G_UNLIKELY (default_manager == NULL))
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default_manager = g_object_new (CLUTTER_TYPE_DEVICE_MANAGER, NULL);
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return default_manager;
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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 ClutterInputDevice):
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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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g_return_val_if_fail (CLUTTER_IS_DEVICE_MANAGER (device_manager), NULL);
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return g_slist_copy (device_manager->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 ClutterInputDevice):
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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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g_return_val_if_fail (CLUTTER_IS_DEVICE_MANAGER (device_manager), NULL);
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return device_manager->devices;
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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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GSList *l;
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g_return_val_if_fail (CLUTTER_IS_DEVICE_MANAGER (device_manager), NULL);
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for (l = device_manager->devices; l != NULL; l = l->next)
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{
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ClutterInputDevice *device = l->data;
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if (device->id == device_id)
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return device;
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}
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return NULL;
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}
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static gint
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input_device_cmp (gconstpointer a,
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gconstpointer b)
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{
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const ClutterInputDevice *device_a = a;
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const ClutterInputDevice *device_b = b;
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if (device_a->id < device_b->id)
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return -1;
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if (device_a->id > device_b->id)
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return 1;
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return 0;
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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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g_return_if_fail (CLUTTER_IS_DEVICE_MANAGER (device_manager));
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device_manager->devices = g_slist_insert_sorted (device_manager->devices,
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device,
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input_device_cmp);
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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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g_return_if_fail (CLUTTER_IS_DEVICE_MANAGER (device_manager));
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if (g_slist_find (device_manager->devices, device) == NULL)
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return;
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device_manager->devices = g_slist_remove (device_manager->devices, 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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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 = device_manager->devices; d != NULL; 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);
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}
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}
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