KeyTapGesture¶

Attributes:

class Leap.KeyTapGesture¶

Extends Gesture.

The KeyTapGesture class represents a tapping gesture by a finger or tool.

A key tap gesture is recognized when the tip of a finger rotates down toward the palm and then springs back to approximately the original postion, as if tapping. The tapping finger must pause briefly before beginning the tap.

Important: To use key tap gestures in your application, you must enable recognition of the key tap gesture. You can enable recognition with:

controller.enable_gesture(Leap.Gesture.TYPE_KEY_TAP);

Key tap gestures are discrete. The KeyTapGesture object representing a tap always has the state, STATE_STOP. Only one KeyTapGesture object is created for each key tap gesture recognized.

You can set the minimum finger movement and velocity required for a movement to be recognized as a key tap as well as adjust the detection window for evaluating the movement using the config attribute of a connected Controller object. Use the following configuration keys to configure key tap recognition:

Key string	Value type	Default value	Units
Gesture.KeyTap.MinDownVelocity	float	50	mm/s
Gesture.KeyTap.HistorySeconds	float	0.1	s
Gesture.KeyTap.MinDistance	float	3.0	mm

The following example demonstrates how to set the key tap configuration parameters:

controller.config.set("Gesture.KeyTap.MinDownVelocity", 40.0)
controller.config.set("Gesture.KeyTap.HistorySeconds", .2)
controller.config.set("Gesture.KeyTap.MinDistance", 1.0)
controller.config.save()

New in version 1.0.

classmethod KeyTapGesture([gesture])¶

Constructs a KeyTapGesture object from an instance of the Gesture class.

for gesture in frame.gestures():
    if gesture.type is Leap.Gesture.TYPE_KEY_TAP:
        key_tap = Leap.KeyTapGesture(gesture)

Parameters:	gesture (Gesture) – The Gesture instance to specialize. This Gesture instance must be a KeyTapGesture object. If no argument is supplied, an invalid KeyTapGesture object is created.

New in version 1.0.

position¶

Type:	Vector

The position where the key tap is registered.

tap_point = key_tap.position

New in version 1.0.

direction¶

Type:	Vector

The direction of finger tip motion. If the finger is stationary, at the time this gesture object is recorded, then the direction will be a zero vector.

tap_direction = key_tap.direction

New in version 1.0.

progress¶

Type:	float

The progess value is always 1.0 for a key tap gesture.

New in version 1.0.

pointable¶

Type:	Pointable

The finger performing the key tap gesture.

tapper = key_tap.pointable

New in version 1.0.

class_type¶

Type:	integer The key tap gesture type designator: Gesture.TYPE_KEY_TAP New in version 1.0.