e0f04efa41
If we do not unset the Stage we will have stale data, and the Crossing event when re-entering a Stage will not be emitted, as the actor under the pointer might be the same as before.
685 lines
20 KiB
C
685 lines
20 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-input-device
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* @short_description: An input device managed by Clutter
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*
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* #ClutterInputDevice represents an input device known to Clutter.
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*
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* The #ClutterInputDevice class holds the state of the device, but
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* its contents are usually defined by the Clutter backend in use.
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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-enum-types.h"
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#include "clutter-input-device.h"
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#include "clutter-private.h"
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enum
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{
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PROP_0,
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PROP_ID,
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PROP_DEVICE_TYPE,
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PROP_NAME
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};
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G_DEFINE_TYPE (ClutterInputDevice, clutter_input_device, G_TYPE_OBJECT);
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static void
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clutter_input_device_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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ClutterInputDevice *self = CLUTTER_INPUT_DEVICE (gobject);
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switch (prop_id)
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{
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case PROP_ID:
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self->id = g_value_get_int (value);
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break;
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case PROP_DEVICE_TYPE:
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self->device_type = g_value_get_enum (value);
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break;
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case PROP_NAME:
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self->device_name = g_strdup (g_value_get_string (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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break;
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}
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}
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static void
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clutter_input_device_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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ClutterInputDevice *self = CLUTTER_INPUT_DEVICE (gobject);
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switch (prop_id)
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{
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case PROP_ID:
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g_value_set_int (value, self->id);
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break;
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case PROP_DEVICE_TYPE:
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g_value_set_enum (value, self->device_type);
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break;
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case PROP_NAME:
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g_value_set_string (value, self->device_name);
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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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break;
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}
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}
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static void
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clutter_input_device_class_init (ClutterInputDeviceClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GParamSpec *pspec;
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gobject_class->set_property = clutter_input_device_set_property;
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gobject_class->get_property = clutter_input_device_get_property;
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/**
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* ClutterInputDevice:id:
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*
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* The unique identifier of the device
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*
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* Since: 1.2
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*/
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pspec = g_param_spec_int ("id",
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"Id",
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"Unique identifier of the device",
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-1, G_MAXINT,
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0,
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CLUTTER_PARAM_READWRITE |
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G_PARAM_CONSTRUCT_ONLY);
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g_object_class_install_property (gobject_class, PROP_ID, pspec);
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/**
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* ClutterInputDevice:name:
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*
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* The name of the device
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*
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* Since: 1.2
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*/
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pspec = g_param_spec_string ("name",
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"Name",
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"The name of the device",
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NULL,
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CLUTTER_PARAM_READWRITE |
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G_PARAM_CONSTRUCT_ONLY);
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g_object_class_install_property (gobject_class, PROP_NAME, pspec);
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/**
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* ClutterInputDevice:device-type:
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*
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* The type of the device
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*
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* Since: 1.2
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*/
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pspec = g_param_spec_enum ("device-type",
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"Device Type",
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"The type of the device",
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CLUTTER_TYPE_INPUT_DEVICE_TYPE,
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CLUTTER_POINTER_DEVICE,
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CLUTTER_PARAM_READWRITE |
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G_PARAM_CONSTRUCT_ONLY);
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g_object_class_install_property (gobject_class, PROP_DEVICE_TYPE, pspec);
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}
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static void
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clutter_input_device_init (ClutterInputDevice *self)
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{
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self->id = -1;
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self->device_type = CLUTTER_POINTER_DEVICE;
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self->click_count = 0;
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self->current_time = self->previous_time = CLUTTER_CURRENT_TIME;
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self->current_x = self->previous_x = -1;
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self->current_y = self->previous_y = -1;
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self->current_button_number = self->previous_button_number = -1;
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self->current_state = self->previous_state = 0;
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}
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/*
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* _clutter_input_device_set_coords:
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* @device: a #ClutterInputDevice
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* @x: X coordinate of the device
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* @y: Y coordinate of the device
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*
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* Stores the last known coordinates of the device
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*/
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void
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_clutter_input_device_set_coords (ClutterInputDevice *device,
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gint x,
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gint y)
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{
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g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device));
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if (device->current_x != x)
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device->current_x = x;
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if (device->current_y != y)
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device->current_y = y;
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}
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/*
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* _clutter_input_device_set_state:
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* @device: a #ClutterInputDevice
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* @state: a bitmask of modifiers
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*
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* Stores the last known modifiers state of the device
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*/
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void
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_clutter_input_device_set_state (ClutterInputDevice *device,
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ClutterModifierType state)
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{
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g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device));
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device->current_state = state;
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}
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/*
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* _clutter_input_device_set_time:
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* @device: a #ClutterInputDevice
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* @time_: the time
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*
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* Stores the last known event time of the device
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*/
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void
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_clutter_input_device_set_time (ClutterInputDevice *device,
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guint32 time_)
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{
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g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device));
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if (device->current_time != time_)
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device->current_time = time_;
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}
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/*
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* cursor_weak_unref:
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*
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* #ClutterInputDevice keeps a weak reference on the actor
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* under its pointer; this function unsets the reference on
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* the actor to avoid keeping around stale pointers
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*/
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static void
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cursor_weak_unref (gpointer user_data,
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GObject *object_pointer)
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{
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ClutterInputDevice *device = user_data;
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device->cursor_actor = NULL;
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}
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/*
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* _clutter_input_device_set_stage:
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* @device: a #ClutterInputDevice
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* @stage: a #ClutterStage or %NULL
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*
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* Stores the stage under the device
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*/
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void
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_clutter_input_device_set_stage (ClutterInputDevice *device,
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ClutterStage *stage)
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{
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ClutterStage *old_stage;
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g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device));
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old_stage = device->stage;
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device->stage = stage;
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/* if we left the stage then we also need to unset the
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* cursor actor (and update its :has-pointer property)
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*/
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if (device->stage == NULL &&
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device->cursor_actor != NULL &&
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device->cursor_actor != CLUTTER_ACTOR (old_stage))
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{
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ClutterEvent cev;
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cev.crossing.type = CLUTTER_LEAVE;
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cev.crossing.time = device->current_time;
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cev.crossing.flags = 0;
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cev.crossing.stage = old_stage;
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cev.crossing.source = device->cursor_actor;
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cev.crossing.x = device->current_x;
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cev.crossing.y = device->current_y;
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cev.crossing.device = device;
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cev.crossing.related = device->stage != NULL
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? CLUTTER_ACTOR (device->stage)
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: CLUTTER_ACTOR (old_stage);
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_clutter_stage_queue_event (old_stage, &cev);
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_clutter_actor_set_has_pointer (device->cursor_actor, FALSE);
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g_object_weak_unref (G_OBJECT (device->cursor_actor),
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cursor_weak_unref,
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device);
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}
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device->cursor_actor = NULL;
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}
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/*
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* _clutter_input_device_set_actor:
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* @device: a #ClutterInputDevice
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* @actor: a #ClutterActor
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*
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* Sets the actor under the pointer coordinates of @device
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*
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* This function is called by _clutter_input_device_update()
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* and it will:
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*
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* - queue a %CLUTTER_LEAVE event on the previous pointer actor
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* of @device, if any
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* - set to %FALSE the :has-pointer property of the previous
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* pointer actor of @device, if any
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* - queue a %CLUTTER_ENTER event on the new pointer actor
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* - set to %TRUE the :has-pointer property of the new pointer
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* actor
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*/
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void
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_clutter_input_device_set_actor (ClutterInputDevice *device,
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ClutterActor *actor)
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{
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ClutterActor *old_actor;
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ClutterEvent cev;
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g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device));
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if (actor == device->cursor_actor)
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return;
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old_actor = device->cursor_actor;
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if (old_actor != NULL)
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{
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cev.crossing.type = CLUTTER_LEAVE;
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cev.crossing.time = device->current_time;
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cev.crossing.flags = 0;
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cev.crossing.stage = device->stage;
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cev.crossing.source = device->cursor_actor;
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cev.crossing.x = device->current_x;
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cev.crossing.y = device->current_y;
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cev.crossing.device = device;
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cev.crossing.related = actor;
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/* we need to make sure that this event is processed before
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* any other event we might have queued up until now, so we
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* go on and synthesize the event emission
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*/
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_clutter_process_event (&cev);
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_clutter_actor_set_has_pointer (device->cursor_actor, FALSE);
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g_object_weak_unref (G_OBJECT (device->cursor_actor),
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cursor_weak_unref,
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device);
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device->cursor_actor = NULL;
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}
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if (actor != NULL)
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{
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cev.crossing.type = CLUTTER_ENTER;
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cev.crossing.time = device->current_time;
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cev.crossing.flags = 0;
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cev.crossing.stage = device->stage;
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cev.crossing.x = device->current_x;
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cev.crossing.y = device->current_y;
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cev.crossing.device = device;
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CLUTTER_NOTE (EVENT, "Device '%s' entering '%s' at %d, %d",
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device->device_name,
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clutter_actor_get_name (actor) != NULL
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? clutter_actor_get_name (actor)
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: G_OBJECT_TYPE_NAME (actor),
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device->current_x,
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device->current_y);
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/* if there is an actor overlapping the Stage boundary and we
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* don't do this check then we'll emit an ENTER event only on
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* the actor instead of emitting it on the Stage *and* the
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* actor
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*/
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if (old_actor == NULL && actor != CLUTTER_ACTOR (device->stage))
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{
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cev.crossing.source = CLUTTER_ACTOR (device->stage);
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cev.crossing.related = NULL;
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CLUTTER_NOTE (EVENT, "Adding Crossing[Enter] event for Stage");
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_clutter_process_event (&cev);
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cev.crossing.source = actor;
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cev.crossing.related = CLUTTER_ACTOR (device->stage);
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}
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else
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{
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cev.crossing.source = actor;
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cev.crossing.related = old_actor;
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}
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/* as above: we need to make sure that this event is processed
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* before any other event we might have queued up until now, so
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* we go on and synthesize the event emission
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*/
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_clutter_process_event (&cev);
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}
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device->cursor_actor = actor;
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if (device->cursor_actor != NULL)
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{
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g_object_weak_ref (G_OBJECT (device->cursor_actor),
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cursor_weak_unref,
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device);
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_clutter_actor_set_has_pointer (device->cursor_actor, TRUE);
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}
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}
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/**
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* clutter_input_device_get_device_type:
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* @device: a #ClutterInputDevice
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*
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* Retrieves the type of @device
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*
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* Return value: the type of the device
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*
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* Since: 1.0
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*/
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ClutterInputDeviceType
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clutter_input_device_get_device_type (ClutterInputDevice *device)
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{
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g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device),
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CLUTTER_POINTER_DEVICE);
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return device->device_type;
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}
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/**
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* clutter_input_device_get_device_id:
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* @device: a #ClutterInputDevice
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*
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* Retrieves the unique identifier of @device
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*
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* Return value: the identifier of the device
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*
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* Since: 1.0
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*/
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gint
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clutter_input_device_get_device_id (ClutterInputDevice *device)
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{
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g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device), -1);
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return device->id;
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}
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/**
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* clutter_input_device_get_device_coords:
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* @device: a #ClutterInputDevice of type %CLUTTER_POINTER_DEVICE
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* @x: (out): return location for the X coordinate
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* @y: (out): return location for the Y coordinate
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*
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* Retrieves the latest coordinates of the pointer of @device
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*
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* Since: 1.2
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*/
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void
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clutter_input_device_get_device_coords (ClutterInputDevice *device,
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gint *x,
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gint *y)
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{
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g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device));
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g_return_if_fail (device->device_type == CLUTTER_POINTER_DEVICE);
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if (x)
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*x = device->current_x;
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if (y)
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*y = device->current_y;
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}
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/*
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* _clutter_input_device_update:
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* @device: a #ClutterInputDevice
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*
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* Updates the input @device by determining the #ClutterActor underneath the
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* pointer's cursor
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*
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* This function calls _clutter_input_device_set_actor() if needed.
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*
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* This function only works for #ClutterInputDevice of type
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* %CLUTTER_POINTER_DEVICE.
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*
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* Since: 1.2
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*/
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ClutterActor *
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_clutter_input_device_update (ClutterInputDevice *device)
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{
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ClutterStage *stage;
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ClutterActor *new_cursor_actor;
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ClutterActor *old_cursor_actor;
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gint x, y;
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g_return_val_if_fail (device->device_type == CLUTTER_POINTER_DEVICE, NULL);
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stage = device->stage;
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if (stage == NULL)
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return NULL;
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clutter_input_device_get_device_coords (device, &x, &y);
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old_cursor_actor = device->cursor_actor;
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new_cursor_actor = _clutter_do_pick (stage, x, y, CLUTTER_PICK_REACTIVE);
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/* if the pick could not find an actor then we do not update the
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* input device, to avoid ghost enter/leave events; the pick should
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* never fail, except for bugs in the glReadPixels() implementation
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* in which case this is the safest course of action anyway
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*/
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if (new_cursor_actor == NULL)
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return NULL;
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CLUTTER_NOTE (EVENT,
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"Actor under cursor (device %d, at %d, %d): %s",
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clutter_input_device_get_device_id (device),
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x, y,
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clutter_actor_get_name (new_cursor_actor) != NULL
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? clutter_actor_get_name (new_cursor_actor)
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: G_OBJECT_TYPE_NAME (new_cursor_actor));
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/* short-circuit here */
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if (new_cursor_actor == old_cursor_actor)
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return old_cursor_actor;
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_clutter_input_device_set_actor (device, new_cursor_actor);
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return device->cursor_actor;
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}
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/**
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* clutter_input_device_get_pointer_actor:
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* @device: a #ClutterInputDevice of type %CLUTTER_POINTER_DEVICE
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*
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* Retrieves the #ClutterActor underneath the pointer of @device
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*
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|
* Return value: (transfer none): a pointer to the #ClutterActor or %NULL
|
|
*
|
|
* Since: 1.2
|
|
*/
|
|
ClutterActor *
|
|
clutter_input_device_get_pointer_actor (ClutterInputDevice *device)
|
|
{
|
|
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device), NULL);
|
|
g_return_val_if_fail (device->device_type == CLUTTER_POINTER_DEVICE, NULL);
|
|
|
|
return device->cursor_actor;
|
|
}
|
|
|
|
/**
|
|
* clutter_input_device_get_pointer_stage:
|
|
* @device: a #ClutterInputDevice of type %CLUTTER_POINTER_DEVICE
|
|
*
|
|
* Retrieves the #ClutterStage underneath the pointer of @device
|
|
*
|
|
* Return value: (transfer none): a pointer to the #ClutterStage or %NULL
|
|
*
|
|
* Since: 1.2
|
|
*/
|
|
ClutterStage *
|
|
clutter_input_device_get_pointer_stage (ClutterInputDevice *device)
|
|
{
|
|
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device), NULL);
|
|
g_return_val_if_fail (device->device_type == CLUTTER_POINTER_DEVICE, NULL);
|
|
|
|
return device->stage;
|
|
}
|
|
|
|
/**
|
|
* clutter_input_device_get_device_name:
|
|
* @device: a #ClutterInputDevice
|
|
*
|
|
* Retrieves the name of the @device
|
|
*
|
|
* Return value: the name of the device, or %NULL. The returned string
|
|
* is owned by the #ClutterInputDevice and should never be modified
|
|
* or freed
|
|
*
|
|
* Since: 1.2
|
|
*/
|
|
G_CONST_RETURN gchar *
|
|
clutter_input_device_get_device_name (ClutterInputDevice *device)
|
|
{
|
|
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device), NULL);
|
|
|
|
return device->device_name;
|
|
}
|
|
|
|
/**
|
|
* clutter_input_device_update_from_event:
|
|
* @device: a #ClutterInputDevice
|
|
* @event: a #ClutterEvent
|
|
* @update_stage: whether to update the #ClutterStage of the @device
|
|
* using the stage of the event
|
|
*
|
|
* Forcibly updates the state of the @device using a #ClutterEvent
|
|
*
|
|
* This function should never be used by applications: it is meant
|
|
* for integration with embedding toolkits, like clutter-gtk
|
|
*
|
|
* Embedding toolkits that disable the event collection inside Clutter
|
|
* need to use this function to update the state of input devices depending
|
|
* on a #ClutterEvent that they are going to submit to the event handling code
|
|
* in Clutter though clutter_do_event(). Since the input devices hold the state
|
|
* that is going to be used to fill in fields like the #ClutterButtonEvent
|
|
* click count, or to emit synthesized events like %CLUTTER_ENTER and
|
|
* %CLUTTER_LEAVE, it is necessary for embedding toolkits to also be
|
|
* responsible of updating the input device state.
|
|
*
|
|
* For instance, this might be the code to translate an embedding toolkit
|
|
* native motion notification into a Clutter #ClutterMotionEvent and ask
|
|
* Clutter to process it:
|
|
*
|
|
* |[
|
|
* ClutterEvent c_event;
|
|
*
|
|
* translate_native_event_to_clutter (native_event, &c_event);
|
|
*
|
|
* clutter_do_event (&c_event);
|
|
* ]|
|
|
*
|
|
* Before letting clutter_do_event() process the event, it is necessary to call
|
|
* clutter_input_device_update_from_event():
|
|
*
|
|
* |[
|
|
* ClutterEvent c_event;
|
|
* ClutterDeviceManager *manager;
|
|
* ClutterInputDevice *device;
|
|
*
|
|
* translate_native_event_to_clutter (native_event, &c_event);
|
|
*
|
|
* /* get the device manager */
|
|
* manager = clutter_device_manager_get_default ();
|
|
*
|
|
* /* use the default Core Pointer that Clutter
|
|
* * backends register by default
|
|
* */
|
|
* device = clutter_device_manager_get_core_device (manager, %CLUTTER_POINTER_DEVICE);
|
|
*
|
|
* /* update the state of the input device */
|
|
* clutter_input_device_update_from_event (device, &c_event, FALSE);
|
|
*
|
|
* clutter_do_event (&c_event);
|
|
* ]|
|
|
*
|
|
* The @update_stage boolean argument should be used when the input device
|
|
* enters and leaves a #ClutterStage; it will use the #ClutterStage field
|
|
* of the passed @event to update the stage associated to the input device.
|
|
*
|
|
* Since: 1.2
|
|
*/
|
|
void
|
|
clutter_input_device_update_from_event (ClutterInputDevice *device,
|
|
ClutterEvent *event,
|
|
gboolean update_stage)
|
|
{
|
|
ClutterModifierType event_state;
|
|
ClutterStage *event_stage;
|
|
gfloat event_x, event_y;
|
|
guint32 event_time;
|
|
|
|
g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device));
|
|
g_return_if_fail (event != NULL);
|
|
|
|
event_state = clutter_event_get_state (event);
|
|
event_time = clutter_event_get_time (event);
|
|
event_stage = clutter_event_get_stage (event);
|
|
clutter_event_get_coords (event, &event_x, &event_y);
|
|
|
|
_clutter_input_device_set_coords (device, event_x, event_y);
|
|
_clutter_input_device_set_state (device, event_state);
|
|
_clutter_input_device_set_time (device, event_time);
|
|
|
|
if (update_stage)
|
|
_clutter_input_device_set_stage (device, event_stage);
|
|
}
|