This is the public interface for the GEIS gesture API. More...

#include <geis/geisimpl.h>

Data Structures
class	GeisWinInfo
	Generic display region description block. More...
struct	GeisInputFuncs
	Callback functions used to handle changes in the available input devices. More...
struct	GeisGestureAttr
	An individual gesture attribute. More...
struct	GeisGestureFuncs
	The set of callback functions invoked for various gesture-related events. More...
Defines
#define	GEIS_VERSION_1_0
	GEIS version macros.
#define	GEIS_VERSION_2_0
#define	GEIS_FALSE
#define	GEIS_TRUE
#define	GEIS_GESTURE_DRAG
#define	GEIS_GESTURE_PINCH
#define	GEIS_GESTURE_ROTATE
#define	GEIS_GESTURE_TAP
#define	GEIS_GESTURE_TOUCH
#define	GEIS_GESTURE_FLICK
#define	GEIS_GESTURE_PRIMITIVE_DRAG
	A translate gesture: dragging, swiping, flicking, moving in a generally linear fashion.
#define	GEIS_GESTURE_PRIMITIVE_PINCH
	A pinch or expand gesture: two or more touch points generally moving toward or away from a common point.
#define	GEIS_GESTURE_PRIMITIVE_ROTATE
	A rotation gesture.
#define	GEIS_GESTURE_PRIMITIVE_TAP
	A tap.
#define	GEIS_GESTURE_PRIMITIVE_TOUCH
	A parenthetical gesture event.
#define	GEIS_GESTURE_ID_FLICK
#define	GEIS_GESTURE_TYPE_DRAG1
#define	GEIS_GESTURE_TYPE_DRAG2
#define	GEIS_GESTURE_TYPE_DRAG3
#define	GEIS_GESTURE_TYPE_DRAG4
#define	GEIS_GESTURE_TYPE_DRAG5
#define	GEIS_GESTURE_TYPE_PINCH1
#define	GEIS_GESTURE_TYPE_PINCH2
#define	GEIS_GESTURE_TYPE_PINCH3
#define	GEIS_GESTURE_TYPE_PINCH4
#define	GEIS_GESTURE_TYPE_PINCH5
#define	GEIS_GESTURE_TYPE_ROTATE1
#define	GEIS_GESTURE_TYPE_ROTATE2
#define	GEIS_GESTURE_TYPE_ROTATE3
#define	GEIS_GESTURE_TYPE_ROTATE4
#define	GEIS_GESTURE_TYPE_ROTATE5
#define	GEIS_GESTURE_TYPE_TAP1
#define	GEIS_GESTURE_TYPE_TAP2
#define	GEIS_GESTURE_TYPE_TAP3
#define	GEIS_GESTURE_TYPE_TAP4
#define	GEIS_GESTURE_TYPE_TAP5
#define	GEIS_GESTURE_TYPE_TOUCH1
#define	GEIS_GESTURE_TYPE_TOUCH2
#define	GEIS_GESTURE_TYPE_TOUCH3
#define	GEIS_GESTURE_TYPE_TOUCH4
#define	GEIS_GESTURE_TYPE_TOUCH5
#define	GEIS_GESTURE_TYPE_SYSTEM
	A special gesture type than enabled system-wide gesture priority.
#define	GEIS_GESTURE_TYPE_FLICK1
#define	GEIS_GESTURE_TYPE_FLICK2
#define	GEIS_GESTURE_TYPE_FLICK3
#define	GEIS_GESTURE_TYPE_FLICK4
#define	GEIS_GESTURE_TYPE_FLICK5
#define	GEIS_CONFIG_UNIX_FD
	Gets the Unix file descriptor for GEIS events.
#define	GEIS_ALL_INPUT_DEVICES
#define	GEIS_ALL_GESTURES
	Selects ALL input devices.
#define	GEIS_NO_GESTURE_ID
#define	GEIS_DEFAULT_EVENT_CALLBACK
	A special constant indicating the use of the default event callback.
Standard fundamental gesture attributes
#define	GEIS_GESTURE_ATTRIBUTE_ANGLE
	Angle covered by a gesture since it has started, in radians, counterclockwise.
#define	GEIS_GESTURE_ATTRIBUTE_ANGLE_DELTA
	Angle covered by a gesture since its last update, in radians, counterclockwise.
#define	GEIS_GESTURE_ATTRIBUTE_ANGULAR_VELOCITY
#define	GEIS_GESTURE_ATTRIBUTE_BOUNDINGBOX_X1
#define	GEIS_GESTURE_ATTRIBUTE_BOUNDINGBOX_Y1
#define	GEIS_GESTURE_ATTRIBUTE_BOUNDINGBOX_X2
#define	GEIS_GESTURE_ATTRIBUTE_BOUNDINGBOX_Y2
#define	GEIS_GESTURE_ATTRIBUTE_CHILD_WINDOW_ID
#define	GEIS_GESTURE_ATTRIBUTE_CENTROID_X
	This attribute provides the X coordinate of the centroid of the non-self-intersecting closed polygon defined by the touch points of the gesture, in device coordinates.
#define	GEIS_GESTURE_ATTRIBUTE_CENTROID_Y
	This attribute provides the Y coordinate of the centroid of the non-self-intersecting closed polygon defined by the touch points of the gesture, in device coordinates.
#define	GEIS_GESTURE_ATTRIBUTE_DELTA_X
#define	GEIS_GESTURE_ATTRIBUTE_DELTA_Y
#define	GEIS_GESTURE_ATTRIBUTE_DEVICE_ID
#define	GEIS_GESTURE_ATTRIBUTE_EVENT_WINDOW_ID
#define	GEIS_GESTURE_ATTRIBUTE_FOCUS_X
	This attribute provides the X coordinate of the focus point of a gesture, in screen coordinates.
#define	GEIS_GESTURE_ATTRIBUTE_FOCUS_Y
	This attribute provides the Y coordinate of the focus point of a gesture, in screen coordinates.
#define	GEIS_GESTURE_ATTRIBUTE_GESTURE_NAME
	Name of the gesture.
#define	GEIS_GESTURE_ATTRIBUTE_POSITION_X
	This attribute provides the X coordinate of the position of a gesture, in device coordinates.
#define	GEIS_GESTURE_ATTRIBUTE_POSITION_Y
	This attribute provides the Y coordinate of the position of a gesture, in device coordinates.
#define	GEIS_GESTURE_ATTRIBUTE_RADIAL_VELOCITY
#define	GEIS_GESTURE_ATTRIBUTE_RADIUS_DELTA
#define	GEIS_GESTURE_ATTRIBUTE_RADIUS
#define	GEIS_GESTURE_ATTRIBUTE_ROOT_WINDOW_ID
#define	GEIS_GESTURE_ATTRIBUTE_TAP_TIME
#define	GEIS_GESTURE_ATTRIBUTE_TIMESTAMP
#define	GEIS_GESTURE_ATTRIBUTE_TOUCHES
#define	GEIS_GESTURE_ATTRIBUTE_VELOCITY_X
#define	GEIS_GESTURE_ATTRIBUTE_VELOCITY_Y
#define	GEIS_GESTURE_ATTRIBUTE_TOUCH_0_ID
	This attribute provides the ID of the touch at index0.
#define	GEIS_GESTURE_ATTRIBUTE_TOUCH_0_X
	This attribute provides the X coordinate of the touch at index0.
#define	GEIS_GESTURE_ATTRIBUTE_TOUCH_0_Y
	This attribute provides the Y coordinate of the touch at index0.
#define	GEIS_GESTURE_ATTRIBUTE_TOUCH_1_ID
	This attribute provides the ID of the touch at index1.
#define	GEIS_GESTURE_ATTRIBUTE_TOUCH_1_X
	This attribute provides the X coordinate of the touch at index1.
#define	GEIS_GESTURE_ATTRIBUTE_TOUCH_1_Y
	This attribute provides the Y coordinate of the touch at index1.
#define	GEIS_GESTURE_ATTRIBUTE_TOUCH_2_ID
	This attribute provides the ID of the touch at index2.
#define	GEIS_GESTURE_ATTRIBUTE_TOUCH_2_X
	This attribute provides the X coordinate of the touch at index2.
#define	GEIS_GESTURE_ATTRIBUTE_TOUCH_2_Y
	This attribute provides the Y coordinate of the touch at index2.
#define	GEIS_GESTURE_ATTRIBUTE_TOUCH_3_ID
	This attribute provides the ID of the touch at index3.
#define	GEIS_GESTURE_ATTRIBUTE_TOUCH_3_X
	This attribute provides the X coordinate of the touch at index3.
#define	GEIS_GESTURE_ATTRIBUTE_TOUCH_3_Y
	This attribute provides the Y coordinate of the touch at index3.
#define	GEIS_GESTURE_ATTRIBUTE_TOUCH_4_ID
	This attribute provides the ID of the touch at index4.
#define	GEIS_GESTURE_ATTRIBUTE_TOUCH_4_X
	This attribute provides the X coordinate of the touch at index4.
#define	GEIS_GESTURE_ATTRIBUTE_TOUCH_4_Y
	This attribute provides the Y coordinate of the touch at index4.
Standard Initialization Arguments
These initialization arguments are defined by the GEIS v2 specification.
#define	GEIS_INIT_SERVICE_PROVIDER
	Enables GEIS to provide a networked service.
#define	GEIS_INIT_TRACK_DEVICES
	Tells GEIS to send input device events.
#define	GEIS_INIT_TRACK_GESTURE_CLASSES
	Tells GEIS to send gesture class events.
#define	GEIS_INIT_SYNCHRONOUS_START
	Performs all setup synchronously: geis_new() will block until all setup has completed successfully or unsuccessfully.
Vendor-defined Initialization Arguments
These initialization arguments are not a part of the GEIS specification and may change.
#define	GEIS_INIT_UTOUCH_DBUS_BACKEND
	Uses the DBus back end (default).
#define	GEIS_INIT_UTOUCH_GRAIL_BACKEND
	Uses the native grail back end (fallback).
#define	GEIS_INIT_UTOUCH_XCB_BACKEND
	Uses the grail-embedded-in-X11 back end.
#define	GEIS_INIT_NO_ATOMIC_GESTURES
	Disables the use of (GEIS v1-style) atomic gestures: only a single gesture is recognized at a time.
#define	GEIS_INIT_SEND_TENTATIVE_EVENTS
	Causes tentative events to be sent.
#define	GEIS_INIT_SEND_SYNCHRONOS_EVENTS
	Causes all gesture events to be sent, even if there is zero apparent time difference between the events.
Required Configuration Items
These configuration items are defined by the GEIS specification.
#define	GEIS_CONFIGURATION_FD
	Gets a Unix file descriptor that will signal the availablility of GEIS events for processing.
Vendor-defined Configuration Items
These configuration items are not a part of the GEIS specification and may change.
#define	GEIS_CONFIG_UTOUCH_MAX_EVENTS
#define	GEIS_CONFIG_ATOMIC_GESTURES
	Indicates if atomic gestures are in use.
#define	GEIS_CONFIG_SEND_TENTATIVE_EVENTS
	See GEIS_INIT_SEND_TENTATIVE_EVENTS.
#define	GEIS_CONFIG_SEND_SYNCHRONOS_EVENTS
	See GEIS_INIT_SEND_SYNCHRONOS_EVENTS.
Device Event Attributes
#define	GEIS_EVENT_ATTRIBUTE_DEVICE
	The event attribute containing a pointer to a GeisDevice.
Device Attributes
#define	GEIS_DEVICE_ATTRIBUTE_NAME
	The name of the input device.
#define	GEIS_DEVICE_ATTRIBUTE_ID
	The unique integer ID of the device.
#define	GEIS_DEVICE_ATTRIBUTE_TOUCHES
	The maximum number of touches a device is capable of reporting.
#define	GEIS_DEVICE_ATTRIBUTE_DIRECT_TOUCH
	Indicates the device is a direct touch device.
#define	GEIS_DEVICE_ATTRIBUTE_INDEPENDENT_TOUCH
	Indicates the device is an independent touch device.
#define	GEIS_DEVICE_ATTRIBUTE_MIN_X
	The lower bound of the X-axis (nominally horizontal) coordinate values reported by the device.
#define	GEIS_DEVICE_ATTRIBUTE_MAX_X
	The upper bound of the X-axis (nominally horizontal) coordinate values reported by the device.
#define	GEIS_DEVICE_ATTRIBUTE_RES_X
	The resolution of the X-axis (nominally horizontal) coordinate values reported by the device.
#define	GEIS_DEVICE_ATTRIBUTE_MIN_Y
	The lower bound of the Y-axis (nominally vertical) coordinate values reported by the device.
#define	GEIS_DEVICE_ATTRIBUTE_MAX_Y
	The upper bound of the Y-axis (nominally vertical) coordinate values reported by the device.
#define	GEIS_DEVICE_ATTRIBUTE_RES_Y
	The resolution of the Y-axis (nominally vertical) coordinate values reported by the device.
Gesture Class Event Attributes
#define	GEIS_EVENT_ATTRIBUTE_CLASS
	The event attribute containing a pointer to a GeisGestureClass.
Gesture Class Attributes
#define	GEIS_CLASS_ATTRIBUTE_NAME
	The name of the gesture class.
#define	GEIS_CLASS_ATTRIBUTE_ID
	The unique integer ID of the gesture class.
Region Attributes
These attributes can be used to construct filter terms to restrict a gesture subscription to a particular region.
#define	GEIS_REGION_ATTRIBUTE_WINDOWID
	The X11 windowid in which a gesture occurred.
Region Initialization Arguments
Gesture regions are created to describe a particular display/feedback region. The type of the region can not be changed after creation (just create a new region for that). The types of regions are platform specific and each type may require addition arguments. The following region initialization argument names are required by the GEIS v2.0 specification.
#define	GEIS_REGION_X11_ROOT
	Selects the X11 root window as a region.
#define	GEIS_REGION_X11_WINDOWID
	Selects an X11 window as a region.
Gesture Frame Event Attributes
A gesture event (GEIS_EVENT_GESTURE_BEGIN, GEIS_EVENT_GESTURE_UPDATE, GEIS_EVENT_GESTURE_END) should have two GEIS_ATTR_TYPE_POINTER attributes, one containing a GeisGroupSet and one containing a GeisTouchSet. For example: If four fingers are being simultaneously moved over a touchpad or touchscreen surface, Geis could start generating gesture events containing two groups: One group having a single frame from a four-fingers gesture of some class and a second group having two frames, each from a different two-fingers gesture (like one from a Rotate and the other from a Pinch gesture). This means that geis could interpret the movements of those four touch points as both a single four-fingers gesture and as two separate two-fingers gestures. There can be only a single frame per gesture in a gesture event. I.e. no two frames will return the same GeisGestureId in the same gesture event.
#define	GEIS_EVENT_ATTRIBUTE_GROUPSET
	The event attribute containing a pointer to a GeisGroupSet.
#define	GEIS_EVENT_ATTRIBUTE_TOUCHSET
	The event attribute containing a pointer to a GeisTouchSet.
Touch Attributes
Each touch has zero or more attributes associated with it. Differing hardware is capable of reporting differing sets of touch attributes, so there is no guarantee that any or all of the defined touch attributes will bre present. If the touch comes from a direct device (see GEIS_DEVICE_ATTRIBUTE_DIRECT_TOUCH) its position (x and y attributes) will be in window coordinates, otherwise it will be in the input device's own coordinate system.
#define	GEIS_TOUCH_ATTRIBUTE_ID
	Identifies the touch.
#define	GEIS_TOUCH_ATTRIBUTE_X
	The X coordinate of the touch.
#define	GEIS_TOUCH_ATTRIBUTE_Y
	The Y coordinate of the touch.
Typedefs
typedef enum GeisStatus	GeisStatus
	Errors returned from calls.
typedef enum GeisAttrType	GeisAttrType
	Attribute data types.
typedef struct GeisWinInfo	GeisWinInfo
typedef unsigned int	GeisInputDeviceId
typedef void(*	GeisInputCallback )(void cookie, GeisInputDeviceId device_id, void attrs)
	Prototype for input device callback functions.
typedef struct GeisInputFuncs	GeisInputFuncs
	Callback functions used to handle changes in the available input devices.
typedef unsigned int	GeisGestureType
typedef unsigned int	GeisGestureId
typedef struct GeisGestureAttr	GeisGestureAttr
	An individual gesture attribute.
typedef void(*	GeisGestureCallback )(void cookie, GeisGestureType gesture_type, GeisGestureId gesture_id, GeisSize attr_count, GeisGestureAttr attrs)
	A callback used for different gesture events.
typedef struct GeisGestureFuncs	GeisGestureFuncs
	The set of callback functions invoked for various gesture-related events.
typedef enum _GeisEventType	GeisEventType
typedef void(*	GeisEventCallback )(Geis geis, GeisEvent event, void *context)
	The application callback type for the event dispatcher.
typedef enum _GeisFilterFacility	GeisFilterFacility
	Indicates the type of filter.
typedef enum _GeisFilterOperation	GeisFilterOperation
	Indicates the type of filter operation.
typedef int	GeisSubscriptionFlags
Enumerations
enum	GeisStatus { GEIS_STATUS_SUCCESS, GEIS_STATUS_CONTINUE, GEIS_STATUS_EMPTY, GEIS_STATUS_NOT_SUPPORTED, GEIS_BAD_ARGUMENT, GEIS_UNKNOWN_ERROR, GEIS_STATUS_BAD_ARGUMENT, GEIS_STATUS_UNKNOWN_ERROR }
	Errors returned from calls. More...
enum	GeisAttrType { GEIS_ATTR_TYPE_UNKNOWN, GEIS_ATTR_TYPE_BOOLEAN, GEIS_ATTR_TYPE_FLOAT, GEIS_ATTR_TYPE_INTEGER, GEIS_ATTR_TYPE_POINTER, GEIS_ATTR_TYPE_STRING }
	Attribute data types. More...
enum	_GeisEventType { GEIS_EVENT_DEVICE_AVAILABLE, GEIS_EVENT_DEVICE_UNAVAILABLE, GEIS_EVENT_CLASS_AVAILABLE, GEIS_EVENT_CLASS_CHANGED, GEIS_EVENT_CLASS_UNAVAILABLE, GEIS_EVENT_GESTURE_BEGIN, GEIS_EVENT_GESTURE_UPDATE, GEIS_EVENT_GESTURE_END, GEIS_EVENT_TENTATIVE_BEGIN, GEIS_EVENT_TENTATIVE_UPDATE, GEIS_EVENT_TENTATIVE_END, GEIS_EVENT_INIT_COMPLETE, GEIS_EVENT_USER_DEFINED, GEIS_EVENT_ERROR }
enum	_GeisFilterFacility { GEIS_FILTER_DEVICE, GEIS_FILTER_CLASS, GEIS_FILTER_REGION, GEIS_FILTER_SPECIAL }
	Indicates the type of filter. More...
enum	_GeisFilterOperation { GEIS_FILTER_OP_EQ, GEIS_FILTER_OP_NE, GEIS_FILTER_OP_GT, GEIS_FILTER_OP_GE, GEIS_FILTER_OP_LT, GEIS_FILTER_OP_LE }
	Indicates the type of filter operation. More...
enum	{ GEIS_SUBSCRIPTION_NONE, GEIS_SUBSCRIPTION_GRAB, GEIS_SUBSCRIPTION_CONT }
Functions
GeisStatus	geis_configuration_supported (GeisInstance geis_instance, int configuration_item)
	Indicates if a particular feaure is supported.
GeisStatus	geis_configuration_get_value (GeisInstance geis_instance, int configuration_item, void *value)
	Gets a feature configuration value.
GeisStatus	geis_configuration_set_value (GeisInstance geis_instance, int configuration_item, void *value)
	Sets a feature configuration value.
GeisStatus	geis_event_dispatch (GeisInstance geis_instance)
	Dispatches geis events until there are no further events available.
GeisSize	geis_error_count (Geis geis)
	Gets the number of status codes in the error stack.
GeisStatus	geis_error_code (Geis geis, GeisSize index)
	Gets the indicated status code from the error stack.
GeisString	geis_error_message (Geis geis, GeisSize index)
	Gets the localized error message, if any, associated with the indicated error.
GeisStatus	geis_get_configuration (Geis geis, GeisString configuration_item_name, void *configuration_item_value)
	Gets a feature configuration value.
GeisStatus	geis_set_configuration (Geis geis, GeisString configuration_item_name, void *configuration_item_value)
	Sets a feature configuration value.
GeisStatus	geis_input_devices (GeisInstance geis_instance, GeisInputFuncs func, void cookie)
	Registers a callback to receive information on input devices.
GeisStatus	geis_subscribe (GeisInstance geis_instance, GeisInputDeviceId input_list, const char gesture_list, GeisGestureFuncs funcs, void *cookie)
	Registers a callback to receive gesture events.
GeisStatus	geis_unsubscribe (GeisInstance geis_instance, GeisGestureType *gesture_list)
	Unsubscribes to one or more gestures.
GeisString	geis_attr_name (GeisAttr attr)
	An opaque type that encapsulates a GEIS attribute.
GeisAttrType	geis_attr_type (GeisAttr attr)
	Gets the type of an attribute value.
GeisBoolean	geis_attr_value_to_boolean (GeisAttr attr)
	Gets the value of an attribute as a GeisBoolean.
GeisFloat	geis_attr_value_to_float (GeisAttr attr)
	Gets the value of an attribute as a GeisFloat.
GeisInteger	geis_attr_value_to_integer (GeisAttr attr)
	Gets the value of an attribute as a GeisInteger.
GeisPointer	geis_attr_value_to_pointer (GeisAttr attr)
	Gets the value of an attribute as a GeisPointer.
GeisString	geis_attr_value_to_string (GeisAttr attr)
	Gets the value of an attribute as a GeisString.
void	geis_register_event_callback (Geis geis, GeisEventCallback event_callback, void *context)
	Registers an event-handler callback.
GeisStatus	geis_dispatch_events (Geis geis)
	Pumps the GEIS event loop.
GeisStatus	geis_next_event (Geis geis, GeisEvent *event)
	Retrieves the next queued GEIS event.
void	geis_register_device_callback (Geis geis, GeisEventCallback event_callback, void *context)
GeisDevice	geis_get_device (Geis geis, GeisInteger device_id)
	Gets a cached device description for an identified device.
void	geis_register_class_callback (Geis geis, GeisEventCallback event_callback, void *context)
	Registers a callback to receive gesture class change notifications.
GeisStatus	geis_gesture_accept (Geis geis, GeisGroup group, GeisGestureId gesture_id)
	Marks a gesture as accepted.
GeisStatus	geis_gesture_reject (Geis geis, GeisGroup group, GeisGestureId gesture_id)
	Marks a gesture as rejected.

Detailed Description

This is the public interface for the GEIS gesture API.

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 3 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 General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 US

Define Documentation

#define GEIS_GESTURE_ATTRIBUTE_ANGLE

Angle covered by a gesture since it has started, in radians, counterclockwise.

Its value ranges from -pi to pi.

#define GEIS_GESTURE_ATTRIBUTE_ANGLE_DELTA

Angle covered by a gesture since its last update, in radians, counterclockwise.

#define GEIS_GESTURE_ATTRIBUTE_CENTROID_X

This attribute provides the X coordinate of the centroid of the non-self-intersecting closed polygon defined by the touch points of the gesture, in device coordinates.

#define GEIS_GESTURE_ATTRIBUTE_CENTROID_Y

This attribute provides the Y coordinate of the centroid of the non-self-intersecting closed polygon defined by the touch points of the gesture, in device coordinates.

#define GEIS_GESTURE_ATTRIBUTE_FOCUS_X

This attribute provides the X coordinate of the focus point of a gesture, in screen coordinates.

For direct devices (GEIS_DEVICE_ATTRIBUTE_DIRECT_TOUCH is GEIS_TRUE) it's the centroid point. For indirect devices it's the pointer/cursor position.

#define GEIS_GESTURE_ATTRIBUTE_FOCUS_Y

This attribute provides the Y coordinate of the focus point of a gesture, in screen coordinates.

For direct devices (GEIS_DEVICE_ATTRIBUTE_DIRECT_TOUCH is GEIS_TRUE) it's the centroid point. For indirect devices it's the pointer/cursor position.

#define GEIS_GESTURE_ATTRIBUTE_GESTURE_NAME

Name of the gesture.

This attribute is filled only when using GEIS v1 API (the simplified interface). On GEIS v2 this attribute has been replaced by the concept of gesture classes. Use geis_frame_is_class() instead.

#define GEIS_GESTURE_ATTRIBUTE_POSITION_X

This attribute provides the X coordinate of the position of a gesture, in device coordinates.

It's the same as the centroid of a gesture. See GEIS_GESTURE_ATTRIBUTE_CENTROID_X.

#define GEIS_GESTURE_ATTRIBUTE_POSITION_Y

This attribute provides the Y coordinate of the position of a gesture, in device coordinates.

It's the same as the centroid of a gesture. See GEIS_GESTURE_ATTRIBUTE_CENTROID_Y.

#define GEIS_GESTURE_ATTRIBUTE_TOUCH_0_ID

This attribute provides the ID of the touch at index0.

Only used by GEIS v1 API.

#define GEIS_GESTURE_ATTRIBUTE_TOUCH_0_X

This attribute provides the X coordinate of the touch at index0.

Only used by GEIS v1 API.