onPinch method

  1. @override
void onPinch(
  1. Point<int> start1,
  2. Point<int> start2,
  3. Point<int> end1,
  4. Point<int> end2,
  5. Point<int> center,
)

Called when a continuous two-pointer pinch gesture occurs.

A pinch is formed by two pointers moving while remaining in contact with the screen.

Parameters

  • start1: Initial position of the first pointer.
  • start2: Initial position of the second pointer.
  • end1: Current position of the first pointer.
  • end2: Current position of the second pointer.
  • center: Computed gesture center.

Implementation

@override
void onPinch(
  final Point<int> start1,
  final Point<int> start2,
  final Point<int> end1,
  final Point<int> end2,
  final Point<int> center,
) {
  _pinchCallback?.call(start1, start2, end1, end2, center);
}