Get the historical pressure of this event for the given pointer index that
occurred between this event and the previous motion event.
The pressure generally ranges from 0 (no pressure at all) to 1 (normal pressure),
although values higher than 1 may be generated depending on the calibration of
the input device.
Get the historical pressure of this event for the given pointer index that occurred between this event and the previous motion event. The pressure generally ranges from 0 (no pressure at all) to 1 (normal pressure), although values higher than 1 may be generated depending on the calibration of the input device.