Gets the offset from the start point.
If the gesture is active, this function returns true and fills in x and y with the coordinates of the current point, as an offset to the starting drag point.
X offset for the current point
Y offset for the current point
true if the gesture is active
Gets the offset from the start point.
If the gesture is active, this function returns true and fills in x and y with the coordinates of the current point, as an offset to the starting drag point.