isa/mutter
1
0
Fork 0
mirror of https://github.com/brl/mutter.git synced 2024-12-28 22:02:14 +00:00
Code Issues Packages Projects Releases Wiki Activity
001f84875a
mutter/clutter/clutter-input-device.c
Emmanuele Bassi 1b1e77b469 event/x11: Rework the way we translate X11 events 
This is a lump commit that is fairly difficult to break down without
either breaking bisecting or breaking the test cases.

The new design for handling X11 event translation works this way:

  - ClutterBackend::translate_event() has been added as the central
    point used by a ClutterBackend implementation to translate a
    native event into a ClutterEvent;

  - ClutterEventTranslator is a private interface that should be
    implemented by backend-specific objects, like stage
    implementations and ClutterDeviceManager sub-classes, and
    allows dealing with class-specific event translation;

  - ClutterStageX11 implements EventTranslator, and deals with the
    stage-relative X11 events coming from the X11 event source;

  - ClutterStageGLX overrides EventTranslator, in order to
    deal with the INTEL_GLX_swap_event extension, and it chains up
    to the X11 default implementation;

  - ClutterDeviceManagerX11 has been split into two separate classes,
    one that deals with core and (optionally) XI1 events, and the
    other that deals with XI2 events; the selection is done at run-time,
    since the core+XI1 and XI2 mechanisms are mutually exclusive.

All the other backends we officially support still use their own
custom event source and translation function, but the end goal is to
migrate them to the translate_event() virtual function, and have the
event source be a shared part of Clutter core.
2011-01-21 10:25:43 +00:00

1107 lines
30 KiB
C
Raw Blame History

/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2009 Intel Corp.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Author: Emmanuele Bassi <ebassi@linux.intel.com>
*/
/**
* SECTION:clutter-input-device
* @short_description: An input device managed by Clutter
*
* #ClutterInputDevice represents an input device known to Clutter.
*
* The #ClutterInputDevice class holds the state of the device, but
* its contents are usually defined by the Clutter backend in use.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-input-device.h"
#include "clutter-actor-private.h"
#include "clutter-debug.h"
#include "clutter-device-manager-private.h"
#include "clutter-enum-types.h"
#include "clutter-marshal.h"
#include "clutter-private.h"
#include "clutter-stage-private.h"
enum
{
PROP_0,
PROP_BACKEND,
PROP_ID,
PROP_NAME,
PROP_DEVICE_TYPE,
PROP_DEVICE_MANAGER,
PROP_DEVICE_MODE,
PROP_HAS_CURSOR,
PROP_N_AXES,
PROP_LAST
};
enum
{
SELECT_STAGE_EVENTS,
LAST_SIGNAL
};
static GParamSpec *obj_props[PROP_LAST] = { NULL, };
static guint device_signals[LAST_SIGNAL] = { 0, };
G_DEFINE_TYPE (ClutterInputDevice, clutter_input_device, G_TYPE_OBJECT);
static void
clutter_input_device_dispose (GObject *gobject)
{
ClutterInputDevice *device = CLUTTER_INPUT_DEVICE (gobject);
g_free (device->device_name);
if (device->device_mode == CLUTTER_INPUT_MODE_SLAVE)
_clutter_input_device_remove_slave (device->associated, device);
if (device->associated != NULL)
{
_clutter_input_device_set_associated_device (device->associated, NULL);
g_object_unref (device->associated);
device->associated = NULL;
}
if (device->axes != NULL)
{
g_array_free (device->axes, TRUE);
device->axes = NULL;
}
if (device->keys != NULL)
{
g_array_free (device->keys, TRUE);
device->keys = NULL;
}
G_OBJECT_CLASS (clutter_input_device_parent_class)->dispose (gobject);
}
static void
clutter_input_device_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterInputDevice *self = CLUTTER_INPUT_DEVICE (gobject);
switch (prop_id)
{
case PROP_ID:
self->id = g_value_get_int (value);
break;
case PROP_DEVICE_TYPE:
self->device_type = g_value_get_enum (value);
break;
case PROP_DEVICE_MANAGER:
self->device_manager = g_value_get_object (value);
break;
case PROP_DEVICE_MODE:
self->device_mode = g_value_get_enum (value);
break;
case PROP_BACKEND:
self->backend = g_value_get_object (value);
break;
case PROP_NAME:
self->device_name = g_value_dup_string (value);
break;
case PROP_HAS_CURSOR:
self->has_cursor = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_input_device_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterInputDevice *self = CLUTTER_INPUT_DEVICE (gobject);
switch (prop_id)
{
case PROP_ID:
g_value_set_int (value, self->id);
break;
case PROP_DEVICE_TYPE:
g_value_set_enum (value, self->device_type);
break;
case PROP_DEVICE_MANAGER:
g_value_set_object (value, self->device_manager);
break;
case PROP_DEVICE_MODE:
g_value_set_enum (value, self->device_mode);
break;
case PROP_BACKEND:
g_value_set_object (value, self->backend);
break;
case PROP_NAME:
g_value_set_string (value, self->device_name);
break;
case PROP_HAS_CURSOR:
g_value_set_boolean (value, self->has_cursor);
break;
case PROP_N_AXES:
if (self->axes != NULL)
g_value_set_uint (value, self->axes->len);
else
g_value_set_uint (value, 0);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_input_device_class_init (ClutterInputDeviceClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
/**
* ClutterInputDevice:id:
*
* The unique identifier of the device
*
* Since: 1.2
*/
obj_props[PROP_ID] =
g_param_spec_int ("id",
P_("Id"),
P_("Unique identifier of the device"),
-1, G_MAXINT,
0,
CLUTTER_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY);
/**
* ClutterInputDevice:name:
*
* The name of the device
*
* Since: 1.2
*/
obj_props[PROP_NAME] =
g_param_spec_string ("name",
P_("Name"),
P_("The name of the device"),
NULL,
CLUTTER_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY);
/**
* ClutterInputDevice:device-type:
*
* The type of the device
*
* Since: 1.2
*/
obj_props[PROP_DEVICE_TYPE] =
g_param_spec_enum ("device-type",
P_("Device Type"),
P_("The type of the device"),
CLUTTER_TYPE_INPUT_DEVICE_TYPE,
CLUTTER_POINTER_DEVICE,
CLUTTER_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY);
obj_props[PROP_DEVICE_MANAGER] =
g_param_spec_object ("device-manager",
P_("Device Manager"),
P_("The device manager instance"),
CLUTTER_TYPE_DEVICE_MANAGER,
CLUTTER_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
obj_props[PROP_DEVICE_MODE] =
g_param_spec_enum ("device-mode",
P_("Device Mode"),
P_("The mode of the device"),
CLUTTER_TYPE_INPUT_MODE,
CLUTTER_INPUT_MODE_FLOATING,
CLUTTER_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
obj_props[PROP_HAS_CURSOR] =
g_param_spec_boolean ("has-cursor",
P_("Has Cursor"),
P_("Whether the device has a cursor"),
FALSE,
CLUTTER_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
obj_props[PROP_N_AXES] =
g_param_spec_uint ("n-axes",
P_("Number of Axes"),
P_("The number of axes on the device"),
0, G_MAXUINT,
0,
CLUTTER_PARAM_READABLE);
obj_props[PROP_BACKEND] =
g_param_spec_object ("backend",
P_("Backend"),
P_("The backend instance"),
CLUTTER_TYPE_BACKEND,
CLUTTER_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
gobject_class->dispose = clutter_input_device_dispose;
gobject_class->set_property = clutter_input_device_set_property;
gobject_class->get_property = clutter_input_device_get_property;
g_object_class_install_properties (gobject_class, PROP_LAST, obj_props);
device_signals[SELECT_STAGE_EVENTS] =
g_signal_new (I_("select-stage-events"),
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
0,
NULL, NULL,
_clutter_marshal_VOID__OBJECT_INT,
G_TYPE_NONE, 2,
CLUTTER_TYPE_STAGE,
G_TYPE_INT);
}
static void
clutter_input_device_init (ClutterInputDevice *self)
{
self->id = -1;
self->device_type = CLUTTER_POINTER_DEVICE;
self->click_count = 0;
self->current_time = self->previous_time = CLUTTER_CURRENT_TIME;
self->current_x = self->previous_x = -1;
self->current_y = self->previous_y = -1;
self->current_button_number = self->previous_button_number = -1;
self->current_state = self->previous_state = 0;
self->min_keycode = 0;
self->max_keycode = G_MAXUINT;
}
/*
* _clutter_input_device_set_coords:
* @device: a #ClutterInputDevice
* @x: X coordinate of the device
* @y: Y coordinate of the device
*
* Stores the last known coordinates of the device
*/
void
_clutter_input_device_set_coords (ClutterInputDevice *device,
gint x,
gint y)
{
g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device));
if (device->current_x != x)
device->current_x = x;
if (device->current_y != y)
device->current_y = y;
}
/*
* _clutter_input_device_set_state:
* @device: a #ClutterInputDevice
* @state: a bitmask of modifiers
*
* Stores the last known modifiers state of the device
*/
void
_clutter_input_device_set_state (ClutterInputDevice *device,
ClutterModifierType state)
{
g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device));
device->current_state = state;
}
/*
* _clutter_input_device_set_time:
* @device: a #ClutterInputDevice
* @time_: the time
*
* Stores the last known event time of the device
*/
void
_clutter_input_device_set_time (ClutterInputDevice *device,
guint32 time_)
{
g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device));
if (device->current_time != time_)
device->current_time = time_;
}
/*
* cursor_weak_unref:
*
* #ClutterInputDevice keeps a weak reference on the actor
* under its pointer; this function unsets the reference on
* the actor to avoid keeping around stale pointers
*/
static void
cursor_weak_unref (gpointer user_data,
GObject *object_pointer)
{
ClutterInputDevice *device = user_data;
device->cursor_actor = NULL;
}
/*
* _clutter_input_device_set_stage:
* @device: a #ClutterInputDevice
* @stage: a #ClutterStage or %NULL
*
* Stores the stage under the device
*/
void
_clutter_input_device_set_stage (ClutterInputDevice *device,
ClutterStage *stage)
{
ClutterStage *old_stage;
g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device));
old_stage = device->stage;
device->stage = stage;
/* if we left the stage then we also need to unset the
* cursor actor (and update its :has-pointer property)
*/
if (device->stage == NULL &&
device->cursor_actor != NULL &&
device->cursor_actor != CLUTTER_ACTOR (old_stage))
{
ClutterEvent cev;
cev.crossing.type = CLUTTER_LEAVE;
cev.crossing.time = device->current_time;
cev.crossing.flags = 0;
cev.crossing.stage = old_stage;
cev.crossing.source = device->cursor_actor;
cev.crossing.x = device->current_x;
cev.crossing.y = device->current_y;
cev.crossing.device = device;
cev.crossing.related = device->stage != NULL
? CLUTTER_ACTOR (device->stage)
: CLUTTER_ACTOR (old_stage);
_clutter_stage_queue_event (old_stage, &cev);
_clutter_actor_set_has_pointer (device->cursor_actor, FALSE);
g_object_weak_unref (G_OBJECT (device->cursor_actor),
cursor_weak_unref,
device);
}
device->cursor_actor = NULL;
}
/*
* _clutter_input_device_set_actor:
* @device: a #ClutterInputDevice
* @actor: a #ClutterActor
*
* Sets the actor under the pointer coordinates of @device
*
* This function is called by _clutter_input_device_update()
* and it will:
*
* - queue a %CLUTTER_LEAVE event on the previous pointer actor
* of @device, if any
* - set to %FALSE the :has-pointer property of the previous
* pointer actor of @device, if any
* - queue a %CLUTTER_ENTER event on the new pointer actor
* - set to %TRUE the :has-pointer property of the new pointer
* actor
*/
void
_clutter_input_device_set_actor (ClutterInputDevice *device,
ClutterActor *actor)
{
ClutterActor *old_actor;
ClutterEvent cev;
g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device));
if (actor == device->cursor_actor)
return;
old_actor = device->cursor_actor;
if (old_actor != NULL)
{
cev.crossing.type = CLUTTER_LEAVE;
cev.crossing.time = device->current_time;
cev.crossing.flags = 0;
cev.crossing.stage = device->stage;
cev.crossing.source = device->cursor_actor;
cev.crossing.x = device->current_x;
cev.crossing.y = device->current_y;
cev.crossing.device = device;
cev.crossing.related = actor;
/* we need to make sure that this event is processed before
* any other event we might have queued up until now, so we
* go on and synthesize the event emission
*/
_clutter_process_event (&cev);
/* processing the event might have destroyed the actor */
if (device->cursor_actor != NULL)
{
_clutter_actor_set_has_pointer (device->cursor_actor, FALSE);
g_object_weak_unref (G_OBJECT (device->cursor_actor),
cursor_weak_unref,
device);
device->cursor_actor = NULL;
}
}
if (actor != NULL)
{
cev.crossing.type = CLUTTER_ENTER;
cev.crossing.time = device->current_time;
cev.crossing.flags = 0;
cev.crossing.stage = device->stage;
cev.crossing.x = device->current_x;
cev.crossing.y = device->current_y;
cev.crossing.device = device;
CLUTTER_NOTE (EVENT, "Device '%s' entering '%s' at %d, %d",
device->device_name,
clutter_actor_get_name (actor) != NULL
? clutter_actor_get_name (actor)
: G_OBJECT_TYPE_NAME (actor),
device->current_x,
device->current_y);
/* if there is an actor overlapping the Stage boundary and we
* don't do this check then we'll emit an ENTER event only on
* the actor instead of emitting it on the Stage *and* the
* actor
*/
if (old_actor == NULL && actor != CLUTTER_ACTOR (device->stage))
{
cev.crossing.source = CLUTTER_ACTOR (device->stage);
cev.crossing.related = NULL;
CLUTTER_NOTE (EVENT, "Adding Crossing[Enter] event for Stage");
_clutter_process_event (&cev);
cev.crossing.source = actor;
cev.crossing.related = CLUTTER_ACTOR (device->stage);
}
else
{
cev.crossing.source = actor;
cev.crossing.related = old_actor;
}
/* as above: we need to make sure that this event is processed
* before any other event we might have queued up until now, so
* we go on and synthesize the event emission
*/
_clutter_process_event (&cev);
}
device->cursor_actor = actor;
if (device->cursor_actor != NULL)
{
g_object_weak_ref (G_OBJECT (device->cursor_actor),
cursor_weak_unref,
device);
_clutter_actor_set_has_pointer (device->cursor_actor, TRUE);
}
}
/**
* clutter_input_device_get_device_type:
* @device: a #ClutterInputDevice
*
* Retrieves the type of @device
*
* Return value: the type of the device
*
* Since: 1.0
*/
ClutterInputDeviceType
clutter_input_device_get_device_type (ClutterInputDevice *device)
{
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device),
CLUTTER_POINTER_DEVICE);
return device->device_type;
}
/**
* clutter_input_device_get_device_id:
* @device: a #ClutterInputDevice
*
* Retrieves the unique identifier of @device
*
* Return value: the identifier of the device
*
* Since: 1.0
*/
gint
clutter_input_device_get_device_id (ClutterInputDevice *device)
{
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device), -1);
return device->id;
}
/**
* clutter_input_device_get_device_coords:
* @device: a #ClutterInputDevice of type %CLUTTER_POINTER_DEVICE
* @x: (out): return location for the X coordinate
* @y: (out): return location for the Y coordinate
*
* Retrieves the latest coordinates of the pointer of @device
*
* Since: 1.2
*/
void
clutter_input_device_get_device_coords (ClutterInputDevice *device,
gint *x,
gint *y)
{
g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device));
if (x)
*x = device->current_x;
if (y)
*y = device->current_y;
}
/*
* _clutter_input_device_update:
* @device: a #ClutterInputDevice
*
* Updates the input @device by determining the #ClutterActor underneath the
* pointer's cursor
*
* This function calls _clutter_input_device_set_actor() if needed.
*
* This function only works for #ClutterInputDevice of type
* %CLUTTER_POINTER_DEVICE.
*
* Since: 1.2
*/
ClutterActor *
_clutter_input_device_update (ClutterInputDevice *device)
{
ClutterStage *stage;
ClutterActor *new_cursor_actor;
ClutterActor *old_cursor_actor;
gint x, y;
if (device->device_type == CLUTTER_KEYBOARD_DEVICE)
return NULL;
stage = device->stage;
if (G_UNLIKELY (stage == NULL))
{
CLUTTER_NOTE (EVENT, "No stage defined for device '%s'",
clutter_input_device_get_device_name (device));
return NULL;
}
clutter_input_device_get_device_coords (device, &x, &y);
old_cursor_actor = device->cursor_actor;
new_cursor_actor = _clutter_do_pick (stage, x, y, CLUTTER_PICK_REACTIVE);
/* if the pick could not find an actor then we do not update the
* input device, to avoid ghost enter/leave events; the pick should
* never fail, except for bugs in the glReadPixels() implementation
* in which case this is the safest course of action anyway
*/
if (new_cursor_actor == NULL)
return NULL;
CLUTTER_NOTE (EVENT,
"Actor under cursor (device %d, at %d, %d): %s",
clutter_input_device_get_device_id (device),
x, y,
clutter_actor_get_name (new_cursor_actor) != NULL
? clutter_actor_get_name (new_cursor_actor)
: G_OBJECT_TYPE_NAME (new_cursor_actor));
/* short-circuit here */
if (new_cursor_actor == old_cursor_actor)
return old_cursor_actor;
_clutter_input_device_set_actor (device, new_cursor_actor);
return device->cursor_actor;
}
/**
* clutter_input_device_get_pointer_actor:
* @device: a #ClutterInputDevice of type %CLUTTER_POINTER_DEVICE
*
* Retrieves the #ClutterActor underneath the pointer of @device
*
* 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, &amp;c_event);
*
* clutter_do_event (&amp;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, &amp;c_event);
*
* /&ast; get the device manager &ast;/
* manager = clutter_device_manager_get_default ();
*
* /&ast; use the default Core Pointer that Clutter
* &ast; backends register by default
* &ast;/
* device = clutter_device_manager_get_core_device (manager, %CLUTTER_POINTER_DEVICE);
*
* /&ast; update the state of the input device &ast;/
* clutter_input_device_update_from_event (device, &amp;c_event, FALSE);
*
* clutter_do_event (&amp;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);
}
void
_clutter_input_device_reset_axes (ClutterInputDevice *device)
{
if (device->axes != NULL)
{
g_array_free (device->axes, TRUE);
g_object_notify_by_pspec (G_OBJECT (device), obj_props[PROP_N_AXES]);
}
}
guint
_clutter_input_device_add_axis (ClutterInputDevice *device,
ClutterInputAxis axis,
gdouble minimum,
gdouble maximum,
gdouble resolution)
{
ClutterAxisInfo info;
guint pos;
if (device->axes == NULL)
device->axes = g_array_new (FALSE, TRUE, sizeof (ClutterAxisInfo));
info.axis = axis;
info.min_value = minimum;
info.max_value = maximum;
info.resolution = resolution;
switch (axis)
{
case CLUTTER_INPUT_AXIS_X:
case CLUTTER_INPUT_AXIS_Y:
info.min_axis = 0;
info.max_axis = 0;
break;
case CLUTTER_INPUT_AXIS_XTILT:
case CLUTTER_INPUT_AXIS_YTILT:
info.min_axis = -1;
info.max_axis = 1;
break;
default:
info.min_axis = 0;
info.max_axis = 1;
}
device->axes = g_array_append_val (device->axes, info);
pos = device->axes->len - 1;
g_object_notify_by_pspec (G_OBJECT (device), obj_props[PROP_N_AXES]);
return pos;
}
gboolean
_clutter_input_device_translate_axis (ClutterInputDevice *device,
guint index_,
gint value,
gdouble *axis_value)
{
ClutterAxisInfo *info;
gdouble width;
gdouble real_value;
if (device->axes == NULL || index_ >= device->axes->len)
return FALSE;
info = &g_array_index (device->axes, ClutterAxisInfo, index_);
if (info->axis == CLUTTER_INPUT_AXIS_X ||
info->axis == CLUTTER_INPUT_AXIS_Y)
return FALSE;
width = info->max_value - info->min_value;
real_value = (info->max_axis * (value - info->min_value)
+ info->min_axis * (info->max_value - value))
/ width;
if (axis_value)
*axis_value = real_value;
return TRUE;
}
ClutterInputAxis
_clutter_input_device_get_axis (ClutterInputDevice *device,
guint index_)
{
ClutterAxisInfo *info;
if (device->axes == NULL)
return CLUTTER_INPUT_AXIS_IGNORE;
if (index_ >= device->axes->len)
return CLUTTER_INPUT_AXIS_IGNORE;
info = &g_array_index (device->axes, ClutterAxisInfo, index_);
return info->axis;
}
guint
clutter_input_device_get_n_axes (ClutterInputDevice *device)
{
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device), 0);
if (device->axes != NULL)
return device->axes->len;
return 0;
}
void
_clutter_input_device_set_keys (ClutterInputDevice *device,
guint n_keys,
gint min_keycode,
gint max_keycode)
{
if (device->keys != NULL)
g_array_free (device->keys, TRUE);
device->n_keys = n_keys;
device->keys = g_array_sized_new (FALSE, TRUE,
sizeof (ClutterKeyInfo),
n_keys);
device->min_keycode = min_keycode;
device->max_keycode = max_keycode;
}
guint
clutter_input_device_get_n_keys (ClutterInputDevice *device)
{
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device), 0);
if (device->keys != NULL)
return device->keys->len;
return 0;
}
void
clutter_input_device_set_key (ClutterInputDevice *device,
guint index_,
guint keyval,
ClutterModifierType modifiers)
{
ClutterKeyInfo *key_info;
g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device));
g_return_if_fail (index_ < device->n_keys);
g_return_if_fail (keyval >= device->min_keycode &&
keyval <= device->max_keycode);
key_info = &g_array_index (device->keys, ClutterKeyInfo, index_);
key_info->keyval = keyval;
key_info->modifiers = modifiers;
}
gboolean
clutter_input_device_get_key (ClutterInputDevice *device,
guint index_,
guint *keyval,
ClutterModifierType *modifiers)
{
ClutterKeyInfo *key_info;
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device), FALSE);
if (device->keys == NULL)
return FALSE;
if (index_ > device->keys->len)
return FALSE;
key_info = &g_array_index (device->keys, ClutterKeyInfo, index_);
if (!key_info->keyval && !key_info->modifiers)
return FALSE;
if (keyval)
*keyval = key_info->keyval;
if (modifiers)
*modifiers = key_info->modifiers;
return TRUE;
}
void
_clutter_input_device_add_slave (ClutterInputDevice *master,
ClutterInputDevice *slave)
{
if (g_list_find (master->slaves, slave) == NULL)
master->slaves = g_list_prepend (master->slaves, slave);
}
void
_clutter_input_device_remove_slave (ClutterInputDevice *master,
ClutterInputDevice *slave)
{
if (g_list_find (master->slaves, slave) != NULL)
master->slaves = g_list_remove (master->slaves, slave);
}
GList *
clutter_input_device_get_slave_devices (ClutterInputDevice *device)
{
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device), NULL);
return g_list_copy (device->slaves);
}
void
_clutter_input_device_set_associated_device (ClutterInputDevice *device,
ClutterInputDevice *associated)
{
if (device->associated == associated)
return;
if (device->associated != NULL)
g_object_unref (device->associated);
device->associated = associated;
if (device->associated != NULL)
g_object_ref (device->associated);
CLUTTER_NOTE (MISC, "Associating device '%s' to device '%s'",
clutter_input_device_get_device_name (device),
device->associated != NULL
? clutter_input_device_get_device_name (device->associated)
: "(none)");
if (device->device_mode != CLUTTER_INPUT_MODE_MASTER)
{
if (device->associated != NULL)
device->device_mode = CLUTTER_INPUT_MODE_SLAVE;
else
device->device_mode = CLUTTER_INPUT_MODE_FLOATING;
g_object_notify_by_pspec (G_OBJECT (device), obj_props[PROP_DEVICE_MODE]);
}
}
ClutterInputDevice *
clutter_input_device_get_associated_device (ClutterInputDevice *device)
{
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device), NULL);
return device->associated;
}
void
_clutter_input_device_select_stage_events (ClutterInputDevice *device,
ClutterStage *stage,
gint event_mask)
{
g_signal_emit (device, device_signals[SELECT_STAGE_EVENTS], 0,
stage,
event_mask);
}
Reference in New Issue View Git Blame Copy Permalink