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|
/*
* Copyright 2010, 2011, 2013 Canonical, Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of either or both of the following licenses:
*
* 1) the GNU Lesser General Public License version 3, as published by the
* Free Software Foundation; and/or
* 2) the GNU Lesser General Public License version 2.1, as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranties of
* MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the applicable version of the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of both the GNU Lesser General Public
* License version 3 and version 2.1 along with this program. If not, see
* <http://www.gnu.org/licenses/>
*
* Authors:
* Cody Russell <crussell@canonical.com>
*/
#include "gripgesturemanager.h"
#include <gdk/gdkx.h>
#include <geis/geis.h>
#include "gripinputdevice.h"
typedef struct _GripGestureBinding GripGestureBinding;
typedef struct _GripRegistrationRequest GripRegistrationRequest;
typedef GPtrArray GripDevices;
/*
* GripGestureClassMap:
* @grip_type: the libgrip gesture type
* @geis_class: the geis gesture class
*
* Provides a mapping between a grip gesture type and a geis gesture class.
*/
typedef struct _GripGestureClassMap
{
GripGestureType grip_type;
GeisGestureClass geis_class;
} GripGestureClassMap;
/*
* GripGestureManagerPrivate:
* @geis: the GEIS instance
* @is_initialized: GEIS async initialization has been successfully completed
* @iochannel: connects the geis object with the main loop
* @iochannel_id: the identifier for the iochannel
* @devices: a collection of recognized input devices
* @classes: a list of grip type to geis class mappings
* @requests: a list of pending binding requests
* @bindings: a list of current gesture bindings
*/
struct _GripGestureManagerPrivate
{
Geis geis;
gboolean is_initialized;
GIOChannel *iochannel;
int iochannel_id;
GripDevices *devices;
GList *classes;
GList *requests;
GList *bindings;
};
G_DEFINE_TYPE (GripGestureManager, grip_gesture_manager, G_TYPE_OBJECT)
#define GRIP_GESTURE_MANAGER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GRIP_TYPE_GESTURE_MANAGER, GripGestureManagerPrivate))
/*
* GripGestureBinding:
* @type:
* @widget:
* @touches:
* @callback:
* @data:
* @destroy:
*
* The mapping between a GEIS subscription and a GTK widget. Sort of.
*/
struct _GripGestureBinding
{
GripGestureType type;
GtkWidget *widget;
guint touches;
GeisSubscription subscription;
GripGestureCallback callback;
gpointer data;
GDestroyNotify destroy;
};
/*
* GripRegistrationRequest:
* @manager: the @GripGestureManager
* @widget: the GtkWidget to be bound
* @gesture_type: the type of gesture to subscribe for
* @device_type: the type of input device to subscribe for
* @touch_points: the number of touches making the gesture
* @callback: the callback to be invoked on gesture events
* @user_data: the callback context to be passed back on gesture events
* @destroy: function to destroy the callback context (NULL for no function)
*
* A collection of information required to register a callback for a
* particulatr type of gestures on a window.
*/
struct _GripRegistrationRequest
{
GripGestureManager *manager;
GtkWidget *widget;
GripGestureType gesture_type;
GripDeviceType device_type;
gint touch_points;
GripGestureCallback callback;
gpointer user_data;
GDestroyNotify destroy;
};
enum
{
DEVICE_AVAILABLE,
DEVICE_UNAVAILABLE,
SIGNAL_LAST
};
static guint signals[SIGNAL_LAST];
static void process_gesture_events (GripGestureManager *manager,
GeisEvent geis_event);
static void toplevel_mapped_cb (GtkWidget *toplevel,
GdkEvent *event,
gpointer user_data);
static void
grip_geis_device_added(GripGestureManager *manager G_GNUC_UNUSED, GeisEvent geis_event)
{
GeisAttr attr = geis_event_attr_by_name(geis_event, GEIS_EVENT_ATTRIBUTE_DEVICE);
g_return_if_fail (attr);
GeisDevice device = geis_attr_value_to_pointer(attr);
g_return_if_fail (device);
switch (geis_event_type(geis_event))
{
case GEIS_EVENT_DEVICE_AVAILABLE:
{
GripInputDevice *input_device = g_object_new (GRIP_TYPE_INPUT_DEVICE,
"geis-device", device,
NULL);
g_ptr_array_add(manager->priv->devices, input_device);
g_signal_emit (manager, signals[DEVICE_AVAILABLE], 0, input_device);
}
break;
case GEIS_EVENT_DEVICE_UNAVAILABLE:
{
guint device_id = geis_device_id (device);
GripDevices *devices = manager->priv->devices;
guint i;
for (i = 0; i < devices->len; ++i)
{
GripInputDevice *input_device = g_ptr_array_index (devices, i);
if (device_id == grip_input_device_get_id (input_device))
{
g_signal_emit (manager, signals[DEVICE_UNAVAILABLE], 0,
input_device);
g_ptr_array_remove_index (devices, i);
break;
}
}
}
break;
default:
break;
}
}
static void
process_class_event(GripGestureManagerPrivate *priv G_GNUC_UNUSED, GeisEvent geis_event)
{
GeisAttr attr = geis_event_attr_by_name (geis_event,
GEIS_EVENT_ATTRIBUTE_CLASS);
g_return_if_fail (attr);
GeisGestureClass gesture_class = geis_attr_value_to_pointer (attr);
g_return_if_fail (gesture_class);
switch (geis_event_type (geis_event))
{
case GEIS_EVENT_CLASS_AVAILABLE:
{
gchar const *class_name = geis_gesture_class_name (gesture_class);
/* check for dups */
GList *l;
for (l = priv->classes; l != NULL; l = l->next)
{
GripGestureClassMap *p = (GripGestureClassMap *)l->data;
if (0 == g_strcmp0 (geis_gesture_class_name (p->geis_class),
class_name))
{
g_warning ("multiple class definitions for '%s' received",
class_name);
return;
}
}
GripGestureClassMap *m = g_new0 (GripGestureClassMap, 1);
if (0 == g_strcmp0 (class_name, "Drag"))
m->grip_type = GRIP_GESTURE_DRAG;
else if (0 == g_strcmp0 (class_name, "Pinch"))
m->grip_type = GRIP_GESTURE_PINCH;
else if (0 == g_strcmp0 (class_name, "Rotate"))
m->grip_type = GRIP_GESTURE_ROTATE;
else if (0 == g_strcmp0 (class_name, "Tap"))
m->grip_type = GRIP_GESTURE_TAP;
else
m->grip_type = (GripGestureType)100;
m->geis_class = gesture_class;
priv->classes = g_list_append (priv->classes, m);
}
break;
default:
/* @todo handle class-changed and class-unavailable events */
g_warning ("gesture class event ignored");
break;
}
}
static void
grip_geis_event_callback(Geis geis G_GNUC_UNUSED, GeisEvent geis_event, void *context)
{
GripGestureManager *self = GRIP_GESTURE_MANAGER (context);
GripGestureManagerPrivate *priv = GRIP_GESTURE_MANAGER_GET_PRIVATE (self);
switch (geis_event_type(geis_event))
{
case GEIS_EVENT_DEVICE_AVAILABLE:
case GEIS_EVENT_DEVICE_UNAVAILABLE:
grip_geis_device_added (self, geis_event);
break;
case GEIS_EVENT_CLASS_AVAILABLE:
case GEIS_EVENT_CLASS_CHANGED:
case GEIS_EVENT_CLASS_UNAVAILABLE:
process_class_event(priv, geis_event);
break;
case GEIS_EVENT_INIT_COMPLETE:
priv->is_initialized = TRUE;
break;
case GEIS_EVENT_GESTURE_BEGIN:
case GEIS_EVENT_GESTURE_UPDATE:
case GEIS_EVENT_GESTURE_END:
process_gesture_events(self, geis_event);
break;
default:
g_warning ("event ignored");
break;
}
geis_event_delete(geis_event);
return;
}
static void
grip_gesture_manager_dispose (GObject *object G_GNUC_UNUSED)
{
}
static void
grip_gesture_manager_finalize (GObject *object)
{
GripGestureManagerPrivate *priv = GRIP_GESTURE_MANAGER_GET_PRIVATE (object);
g_list_foreach(priv->classes, (GFunc) g_free, NULL);
g_list_free(priv->classes);
g_ptr_array_foreach (priv->devices, (GFunc) g_object_unref, NULL);
g_ptr_array_unref (priv->devices);
}
static GObject *
grip_gesture_manager_constructor (GType type,
guint n_params,
GObjectConstructParam *params)
{
static GObject *self = NULL;
if (self == NULL)
{
self = G_OBJECT_CLASS (grip_gesture_manager_parent_class)->
constructor (type, n_params, params);
g_object_add_weak_pointer (self, (gpointer) &self);
}
return g_object_ref (self);
}
static void
grip_gesture_manager_class_init (GripGestureManagerClass *class)
{
GObjectClass *gobject_class;
gobject_class = G_OBJECT_CLASS (class);
grip_gesture_manager_parent_class = g_type_class_peek_parent (class);
g_type_class_add_private (gobject_class, sizeof (GripGestureManagerPrivate));
gobject_class->constructor = grip_gesture_manager_constructor;
gobject_class->dispose = grip_gesture_manager_dispose;
gobject_class->finalize = grip_gesture_manager_finalize;
/**
* GripGestureManager::device-available:
* @gesture_manager: the #GripGestureManager sending the signal
* @input_device: the new #GripInputDevice just added.
*
* Signals the availability of a new gesture-capable input device.
*/
signals[DEVICE_AVAILABLE] = g_signal_new ("device-available",
GRIP_TYPE_GESTURE_MANAGER,
G_SIGNAL_RUN_LAST,
0,
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE,
1,
GRIP_TYPE_INPUT_DEVICE);
/**
* GripGestureManager::device-unavailable:
* @gesture_manager: the #GripGestureManager sending the signal
* @input_device: the new #GripInputDevice just added.
*
* Signals the unavailability of a gesture-capable input device.
*/
signals[DEVICE_UNAVAILABLE] = g_signal_new ("device-unavailable",
GRIP_TYPE_GESTURE_MANAGER,
G_SIGNAL_RUN_LAST,
0,
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE,
1,
GRIP_TYPE_INPUT_DEVICE);
}
/*
* device_id_to_input_device:
* @gesture_manager: the #GripGestureManager
* @device_id: the device ID
*
* Finds a known #GripInputDevice given a GEIS device identifier.
*
* Returns: a pointer to a #GripInputDevice or %NULL if not found.
*/
static GripInputDevice *
device_id_to_input_device (GripGestureManager *gesture_manager,
GeisInputDeviceId device_id)
{
guint j;
GripInputDevice *input_device = NULL;
for (j = 0; j < gesture_manager->priv->devices->len; ++j)
{
GripInputDevice *device;
device = g_ptr_array_index (gesture_manager->priv->devices, j);
if (grip_input_device_get_id (device) == device_id)
{
input_device = device;
break;
}
}
return input_device;
}
static gint
pinch_gesture_handle_properties (GripEventGesturePinch *event,
GeisFrame frame)
{
guint attr_count = geis_frame_attr_count (frame);
gint num_touches = 0;
guint i;
for (i = 0; i < attr_count; ++i)
{
GeisAttr attr = geis_frame_attr(frame, i);
GeisString attr_name = geis_attr_name(attr);
if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_TOUCHES) == 0)
num_touches = geis_attr_value_to_integer(attr);
if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_TIMESTAMP) == 0)
event->timestamp = geis_attr_value_to_integer(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_FOCUS_X) == 0)
event->focus_x = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_FOCUS_Y) == 0)
event->focus_y = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_RADIUS_DELTA) == 0)
event->radius_delta = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_RADIAL_VELOCITY) == 0)
event->radial_velocity = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_RADIUS) == 0)
event->radius = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_POSITION_X) == 0)
event->position_x = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_POSITION_Y) == 0)
event->position_y = geis_attr_value_to_float(attr);
}
return num_touches;
}
static gint
drag_gesture_handle_properties (GripEventGestureDrag *event,
GeisFrame frame)
{
guint attr_count = geis_frame_attr_count (frame);
gint num_touches = 0;
guint i;
for (i = 0; i < attr_count; ++i)
{
GeisAttr attr = geis_frame_attr(frame, i);
GeisString attr_name = geis_attr_name(attr);
if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_TOUCHES) == 0)
num_touches = geis_attr_value_to_integer(attr);
if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_TIMESTAMP) == 0)
event->timestamp = geis_attr_value_to_integer(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_FOCUS_X) == 0)
event->focus_x = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_FOCUS_Y) == 0)
event->focus_y = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_DELTA_X) == 0)
event->delta_x = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_DELTA_Y) == 0)
event->delta_y = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_VELOCITY_X) == 0)
event->velocity_x = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_VELOCITY_Y) == 0)
event->velocity_y = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_POSITION_X) == 0)
event->position_x = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_POSITION_Y) == 0)
event->position_y = geis_attr_value_to_float(attr);
}
return num_touches;
}
static gint
rotate_gesture_handle_properties (GripEventGestureRotate *event,
GeisFrame frame)
{
guint attr_count = geis_frame_attr_count (frame);
gint num_touches = 0;
guint i;
for (i = 0; i < attr_count; ++i)
{
GeisAttr attr = geis_frame_attr(frame, i);
GeisString attr_name = geis_attr_name(attr);
if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_TOUCHES) == 0)
num_touches = geis_attr_value_to_integer(attr);
if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_TIMESTAMP) == 0)
event->timestamp = geis_attr_value_to_integer(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_FOCUS_X) == 0)
event->focus_x = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_FOCUS_Y) == 0)
event->focus_y = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_ANGLE_DELTA) == 0)
event->angle_delta = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_ANGULAR_VELOCITY) == 0)
event->angular_velocity = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_ANGLE) == 0)
event->angle = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_POSITION_X) == 0)
event->position_x = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_POSITION_Y) == 0)
event->position_y = geis_attr_value_to_float(attr);
}
return num_touches;
}
static gint
tap_gesture_handle_properties (GripEventGestureTap *event,
GeisFrame frame)
{
guint attr_count = geis_frame_attr_count (frame);
gint num_touches = 0;
guint i;
for (i = 0; i < attr_count; ++i)
{
GeisAttr attr = geis_frame_attr(frame, i);
GeisString attr_name = geis_attr_name(attr);
if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_TOUCHES) == 0)
num_touches = geis_attr_value_to_integer(attr);
if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_TIMESTAMP) == 0)
event->timestamp = geis_attr_value_to_integer(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_FOCUS_X) == 0)
event->focus_x = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_FOCUS_Y) == 0)
event->focus_y = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_POSITION_X) == 0)
event->position_x = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_POSITION_Y) == 0)
event->position_y = geis_attr_value_to_float(attr);
else if (g_strcmp0 (attr_name, GEIS_GESTURE_ATTRIBUTE_TAP_TIME) == 0)
event->tap_time = geis_attr_value_to_float(attr);
}
return num_touches;
}
static void
process_gesture_events(GripGestureManager *manager, GeisEvent geis_event)
{
GripGestureManagerPrivate *priv = manager->priv;
GripTimeType time_type = GRIP_TIME_UPDATE;
if (geis_event_type(geis_event) == GEIS_EVENT_GESTURE_BEGIN)
time_type = GRIP_TIME_START;
else if (geis_event_type(geis_event) == GEIS_EVENT_GESTURE_END)
time_type = GRIP_TIME_END;
GeisAttr attr = geis_event_attr_by_name (geis_event, GEIS_EVENT_ATTRIBUTE_GROUPSET);
g_return_if_fail (attr);
GeisGroupSet groupset = geis_attr_value_to_pointer (attr);
g_return_if_fail (groupset);
GeisSize i;
for (i = 0; i < geis_groupset_group_count (groupset); ++i)
{
GeisGroup group = geis_groupset_group (groupset, i);
g_return_if_fail (group);
GeisSize j;
for (j = 0; j < geis_group_frame_count (group); ++j)
{
GeisFrame frame = geis_group_frame(group, j);
g_return_if_fail (frame);
GeisAttr window_attr = geis_frame_attr_by_name(frame, GEIS_GESTURE_ATTRIBUTE_EVENT_WINDOW_ID);
guint window_id = geis_attr_value_to_integer(window_attr);
GeisAttr device_attr = geis_frame_attr_by_name(frame, GEIS_GESTURE_ATTRIBUTE_DEVICE_ID);
guint device_id = geis_attr_value_to_integer(device_attr);
GripInputDevice *input_device = device_id_to_input_device (manager, device_id);
GList *l;
for (l = priv->bindings; l != NULL; l = l->next)
{
GripGestureBinding *binding = (GripGestureBinding *)l->data;
guint widget_window_id = GDK_WINDOW_XID (gtk_widget_get_window (binding->widget));
if (widget_window_id == window_id)
{
GList *class_list;
for (class_list = priv->classes; class_list != NULL; class_list = class_list->next)
{
GripGestureClassMap *p = (GripGestureClassMap *)class_list->data;
if (p->grip_type == binding->type)
{
if (geis_frame_is_class(frame, p->geis_class))
{
GripGestureEvent *grip_event = grip_gesture_event_new (p->grip_type);
if (p->grip_type == GRIP_GESTURE_DRAG)
{
GripEventGestureDrag *drag = (GripEventGestureDrag *)grip_event;
drag->type = p->grip_type;
drag->id = geis_frame_id(frame);
drag->input_device = input_device;
drag->fingers = drag_gesture_handle_properties (drag, frame);
binding->callback (binding->widget,
time_type,
grip_event,
binding->data);
}
else if (p->grip_type == GRIP_GESTURE_PINCH)
{
GripEventGesturePinch *pinch = (GripEventGesturePinch *)grip_event;
pinch->type = p->grip_type;
pinch->id = geis_frame_id(frame);
pinch->input_device = input_device;
pinch->fingers = pinch_gesture_handle_properties (pinch, frame);
binding->callback (binding->widget,
time_type,
grip_event,
binding->data);
}
else if (p->grip_type == GRIP_GESTURE_ROTATE)
{
GripEventGestureRotate *rotate = (GripEventGestureRotate *)grip_event;
rotate->type = p->grip_type;
rotate->id = geis_frame_id(frame);
rotate->input_device = input_device;
rotate->fingers = rotate_gesture_handle_properties (rotate, frame);
binding->callback (binding->widget,
time_type,
grip_event,
binding->data);
}
else if (p->grip_type == GRIP_GESTURE_TAP)
{
GripEventGestureTap *tap = (GripEventGestureTap *)grip_event;
tap->type = p->grip_type;
tap->id = geis_frame_id(frame);
tap->input_device = input_device;
tap->fingers = tap_gesture_handle_properties (tap, frame);
binding->callback (binding->widget,
time_type,
grip_event,
binding->data);
}
grip_gesture_event_free (grip_event);
}
}
}
}
}
}
}
}
static gboolean
grip_geis_event_ready (GIOChannel *source G_GNUC_UNUSED,
GIOCondition condition G_GNUC_UNUSED,
gpointer context)
{
Geis geis = (Geis)context;
GeisStatus status G_GNUC_UNUSED = geis_dispatch_events(geis);
return TRUE;
}
static void
grip_gesture_manager_init (GripGestureManager *self)
{
GripGestureManagerPrivate *priv = self->priv = GRIP_GESTURE_MANAGER_GET_PRIVATE (self);
priv->devices = g_ptr_array_new ();
priv->is_initialized = FALSE;
priv->geis = geis_new (GEIS_INIT_TRACK_DEVICES, GEIS_INIT_TRACK_GESTURE_CLASSES, NULL);
g_return_if_fail (priv->geis);
int fd;
geis_get_configuration(priv->geis, GEIS_CONFIGURATION_FD, &fd);
priv->iochannel = g_io_channel_unix_new (fd);
priv->iochannel_id = g_io_add_watch (priv->iochannel, G_IO_IN, grip_geis_event_ready, priv->geis);
geis_register_device_callback (priv->geis, grip_geis_event_callback, self);
geis_register_class_callback (priv->geis, grip_geis_event_callback, self);
geis_register_event_callback (priv->geis, grip_geis_event_callback, self);
}
static void
window_destroyed_cb (GtkWidget *object,
gpointer user_data)
{
GripGestureManager *manager = (GripGestureManager *)user_data;
GList *l = manager->priv->bindings;
while (l != NULL)
{
GList *next = l->next;
GripGestureBinding *binding = l->data;
if (gtk_widget_get_toplevel (binding->widget) == object)
{
geis_subscription_delete (binding->subscription);
if (binding->destroy)
binding->destroy (binding->data);
g_free (binding);
manager->priv->bindings = g_list_delete_link (manager->priv->bindings, l);
}
l = next;
}
}
/* Public API */
GripGestureManager *
grip_gesture_manager_get (void)
{
return g_object_new (GRIP_TYPE_GESTURE_MANAGER, NULL);
}
/*
* processed_mapped_window_request:
* @reg: a #GripRegistrationRequest (removed from the GripGestureManager
* requests listand freed).
*
* Creates a subscription for a widget mapped to a window.
*/
static void
processed_mapped_window_request (GripRegistrationRequest *req)
{
g_return_if_fail (GRIP_IS_GESTURE_MANAGER (req->manager));
g_return_if_fail (GTK_IS_WIDGET (req->widget));
GtkWidget *toplevel = gtk_widget_get_toplevel (req->widget);
g_return_if_fail (GTK_IS_WINDOW (toplevel));
GripGestureManagerPrivate *priv = req->manager->priv;
if (!priv->is_initialized)
return;
guint window_id = GDK_WINDOW_XID (gtk_widget_get_window(toplevel));
/* XXX - check for duplicates in reg->bindings first */
GripGestureBinding *binding = g_new0 (GripGestureBinding, 1);
binding->type = req->gesture_type;
binding->widget = req->widget;
binding->touches = req->touch_points;
binding->callback = req->callback;
binding->data = req->user_data;
binding->destroy = req->destroy;
char sub_name[48];
snprintf(sub_name, 48, "sub-%x-%x-%x", window_id, req->gesture_type, req->touch_points);
binding->subscription = geis_subscription_new (priv->geis, sub_name, GEIS_SUBSCRIPTION_CONT);
g_return_if_fail (binding->subscription);
char filter_id[20];
snprintf(filter_id, 20, "grip-%x", window_id);
GeisFilter window_filter = geis_filter_new(priv->geis, filter_id);
geis_filter_add_term(window_filter, GEIS_FILTER_REGION,
GEIS_REGION_ATTRIBUTE_WINDOWID, GEIS_FILTER_OP_EQ, window_id,
NULL);
switch (req->gesture_type)
{
case GRIP_GESTURE_DRAG:
geis_filter_add_term(window_filter, GEIS_FILTER_CLASS,
GEIS_CLASS_ATTRIBUTE_NAME, GEIS_FILTER_OP_EQ, GEIS_GESTURE_DRAG,
GEIS_GESTURE_ATTRIBUTE_TOUCHES, GEIS_FILTER_OP_EQ, req->touch_points,
NULL);
break;
case GRIP_GESTURE_PINCH:
geis_filter_add_term(window_filter, GEIS_FILTER_CLASS,
GEIS_CLASS_ATTRIBUTE_NAME, GEIS_FILTER_OP_EQ, GEIS_GESTURE_PINCH,
GEIS_GESTURE_ATTRIBUTE_TOUCHES, GEIS_FILTER_OP_EQ, req->touch_points,
NULL);
break;
case GRIP_GESTURE_ROTATE:
geis_filter_add_term(window_filter, GEIS_FILTER_CLASS,
GEIS_CLASS_ATTRIBUTE_NAME, GEIS_FILTER_OP_EQ, GEIS_GESTURE_ROTATE,
GEIS_GESTURE_ATTRIBUTE_TOUCHES, GEIS_FILTER_OP_EQ, req->touch_points,
NULL);
break;
case GRIP_GESTURE_TAP:
geis_filter_add_term(window_filter, GEIS_FILTER_CLASS,
GEIS_CLASS_ATTRIBUTE_NAME, GEIS_FILTER_OP_EQ, GEIS_GESTURE_TAP,
GEIS_GESTURE_ATTRIBUTE_TOUCHES, GEIS_FILTER_OP_EQ, req->touch_points,
NULL);
break;
}
if (req->device_type & GRIP_DEVICE_TOUCHSCREEN)
{
char filter_name[32];
snprintf(filter_name, 32, "%s/touchscreen", filter_id);
GeisFilter touchscreen_filter = geis_filter_clone (window_filter, filter_name);
geis_filter_add_term(touchscreen_filter, GEIS_FILTER_DEVICE,
GEIS_DEVICE_ATTRIBUTE_DIRECT_TOUCH, GEIS_FILTER_OP_EQ, GEIS_TRUE,
NULL);
GeisStatus status = geis_subscription_add_filter(binding->subscription, touchscreen_filter);
g_return_if_fail (status == GEIS_STATUS_SUCCESS);
}
if (req->device_type & GRIP_DEVICE_TOUCHPAD)
{
char filter_name[32];
snprintf(filter_name, 32, "%s/touchpad", filter_id);
GeisFilter touchpad_filter = geis_filter_clone (window_filter, filter_name);
geis_filter_add_term(touchpad_filter, GEIS_FILTER_DEVICE,
GEIS_DEVICE_ATTRIBUTE_DIRECT_TOUCH, GEIS_FILTER_OP_EQ, GEIS_FALSE,
NULL);
GeisStatus status = geis_subscription_add_filter(binding->subscription, touchpad_filter);
g_return_if_fail (status == GEIS_STATUS_SUCCESS);
}
if (req->device_type & GRIP_DEVICE_INDEPENDENT)
{
char filter_name[32];
snprintf(filter_name, 32, "%s/indep", filter_id);
GeisFilter indep_filter = geis_filter_clone (window_filter, filter_name);
geis_filter_add_term(indep_filter, GEIS_FILTER_DEVICE,
GEIS_DEVICE_ATTRIBUTE_INDEPENDENT_TOUCH, GEIS_FILTER_OP_EQ, GEIS_TRUE,
NULL);
GeisStatus status = geis_subscription_add_filter(binding->subscription, indep_filter);
g_return_if_fail (status == GEIS_STATUS_SUCCESS);
}
/*
* If any device types were specified, the window_filter was cloned and needs
* to be disposed of, otehrwise it's _the_ filter.
*/
if (req->device_type)
{
geis_filter_delete(window_filter);
}
else
{
GeisStatus status = geis_subscription_add_filter(binding->subscription, window_filter);
g_return_if_fail (status == GEIS_STATUS_SUCCESS);
}
GeisStatus status = geis_subscription_activate (binding->subscription);
g_return_if_fail (status == GEIS_STATUS_SUCCESS);
priv->bindings = g_list_append (priv->bindings, binding);
g_signal_connect (toplevel,
"destroy",
G_CALLBACK (window_destroyed_cb),
req->manager);
/* remove the request from the watch list */
g_free (req);
priv->requests = g_list_remove (priv->requests, req);
}
/*
* register_mapped_window:
* @manager: a Grip gesture manager object
* @toplevel: a top-level widget
*
* Processes all subscriptions requests for a newly-mapped window.
*/
static void
register_mapped_window (GripGestureManager *manager, GtkWidget *toplevel)
{
g_return_if_fail (gtk_widget_is_toplevel (toplevel));
GList *pending_request = manager->priv->requests;
while (pending_request)
{
GList *next = pending_request->next;
GripRegistrationRequest *req = pending_request->data;
if (gtk_widget_get_toplevel (req->widget) == toplevel)
{
processed_mapped_window_request (req);
}
pending_request = next;
}
}
/*
* register_toplevel_widget:
* @manager: a Grip gesture manager object
* @toplevel: a top-level widget
*
* Handles the registration of a widget that has just become a top-level widget.
*
* If the top-level widget is mapped to a window, it;s handled right away.
* Otherwise, a callback is queued for when it does become mapped to a window.
*/
static void
register_toplevel_widget (GripGestureManager *manager, GtkWidget *toplevel)
{
g_return_if_fail (gtk_widget_is_toplevel (toplevel));
if (gtk_widget_get_mapped (GTK_WIDGET (toplevel)))
{
register_mapped_window (manager, toplevel);
}
else
{
g_signal_connect (toplevel,
"map-event",
G_CALLBACK (toplevel_mapped_cb),
manager);
}
}
/*
* toplevel_notify_cb:
*
* Called when a widget property has changed.
*
* The only widget property we're interested in here is the "parent" property.
* We can't subscribe to gestures on a window until the widget is mapped to a
* window. Only top-level widgets can be mapped to a window: we just keep
* queueing this callback on successive parent widgets until one is a top-level
* widget, then process that one.
*/
static void
toplevel_notify_cb (GtkWidget *widget,
GParamSpec *pspec,
gpointer user_data)
{
if (pspec->name == g_intern_static_string ("parent"))
{
GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
GripGestureManager *manager = (GripGestureManager *)user_data;
g_signal_handlers_disconnect_by_func (widget,
G_CALLBACK (toplevel_notify_cb),
user_data);
if (gtk_widget_is_toplevel (toplevel))
{
register_toplevel_widget (manager, toplevel);
}
else
{
g_signal_connect (G_OBJECT (toplevel),
"notify",
G_CALLBACK (toplevel_notify_cb),
user_data);
}
}
}
/*
* toplevel_mapped_cb:
*
* A callback invoked when a toplevel widget with one or more pending gesture
* registration requests has been mapped to a window.
*
* This callback will in fact process all pending registration requests for the
* newly-mapped window.
*/
static void
toplevel_mapped_cb (GtkWidget *toplevel,
GdkEvent *event G_GNUC_UNUSED,
gpointer user_data)
{
GripGestureManager *manager = (GripGestureManager *)user_data;
register_mapped_window (manager, toplevel);
g_signal_handlers_disconnect_by_func (toplevel,
toplevel_mapped_cb,
user_data);
}
/**
* grip_gesture_manager_register_window:
* @manager: A #GripGestureManager instance.
* @widget: A #GtkWidget to register the gesture event for.
* @gesture_type: The type of gesture event to register.
* @device_type: The type of the device use to create the gesture.
* @touch_points: Number of touch points for this gesture.
* @callback: Called when a gesture starts, updates, or ends.
* @user_data: User data
* @destroy: Destroy callback for user data.
*
* Registers a widget to receive gesture events.
*
* The callback parameters provided will be called by the
* #GripGestureManager whenever the user initiates a gesture
* on the specified window.
*/
void
grip_gesture_manager_register_window (GripGestureManager *manager,
GtkWidget *widget,
GripGestureType gesture_type,
GripDeviceType device_type,
gint touch_points,
GripGestureCallback callback,
gpointer user_data,
GDestroyNotify destroy)
{
g_return_if_fail (GRIP_IS_GESTURE_MANAGER (manager));
g_return_if_fail (GTK_IS_WIDGET (widget));
GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
GripRegistrationRequest *req = g_new0 (GripRegistrationRequest, 1);
req->manager = manager;
req->widget = widget;
req->gesture_type = gesture_type;
req->device_type = device_type;
req->touch_points = touch_points;
req->callback = callback;
req->user_data = user_data;
req->destroy = destroy;
manager->priv->requests = g_list_append (manager->priv->requests, req);
if (GTK_IS_WINDOW (toplevel))
{
register_toplevel_widget (manager, toplevel);
}
else
{
g_signal_connect (toplevel,
"notify",
G_CALLBACK (toplevel_notify_cb),
manager);
}
}
void
grip_gesture_manager_unregister_window (GripGestureManager *manager G_GNUC_UNUSED,
GtkWidget *toplevel G_GNUC_UNUSED)
{
g_return_if_fail (GRIP_IS_GESTURE_MANAGER (manager));
g_return_if_fail (GTK_IS_WINDOW (toplevel));
window_destroyed_cb (toplevel, manager);
}
GType
grip_gesture_event_get_type (void)
{
static GType type = 0;
if (type == 0)
{
type = g_boxed_type_register_static (g_intern_static_string ("GripGestureEvent"),
(GBoxedCopyFunc)grip_gesture_event_copy,
(GBoxedFreeFunc)grip_gesture_event_free);
}
return type;
}
/**
* grip_gesture_event_new:
* @gesture_type: the type of the gesture
*
* Creates a new Grip gesture event.
*
* Returns: a new #GripGestureEvent
*/
GripGestureEvent *
grip_gesture_event_new (GripGestureType gesture_type)
{
GripGestureEvent *event = g_slice_new0 (GripGestureEvent);
event->any.type = gesture_type;
return event;
}
/**
* grip_gesture_event_copy:
* @event: an existing #GripGestureEvent
*
* Creates a new #GripGestureEvent instance using a deep copy of and existing
* event.
*
* Returns: a new #GripGestureEvent
*/
GripGestureEvent *
grip_gesture_event_copy (const GripGestureEvent *event)
{
GripGestureEvent *new_event;
g_return_val_if_fail (event != NULL, NULL);
new_event = grip_gesture_event_new (event->type);
*new_event = *event;
return new_event;
}
/**
* grip_gesture_event_free:
* @event: a #GripGestureEvent
*
* Frees the resources allocated for a #GripGestureEvent.
*/
void
grip_gesture_event_free (GripGestureEvent *event)
{
g_return_if_fail (event != NULL);
g_slice_free (GripGestureEvent, event);
}
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