3.3.6.12 PINCH_ZOOM_THRESHOLD

This parameter is valid only if a two-finger gesture is selected. The PINCH_ZOOM_THRESHOLD sets the maximum allowable distance between two fingers for pinch and zoom gestures to be detected. After crossing the PINCH_ZOOM_THRESHOLD, if the distance between the contacts is reducing, then the gesture is reported as ‘PINCH’. After crossing the PINCH_ZOOM_THRESHOLD, if the distance between the contacts is increasing, then the gesture is reported as ‘ZOOM’.

Unit: coordinates

E.g., If the PINCH_ZOOM_THRESHOLD is set to 20, a pinch or zoom gesture will be recognized once the distance between the two fingers changes by more than 20 units.