flipUp method

void flipUp()

Flips the Flipper to the Top for one time. Only works with DragAxis.vertical and DragAxis.both.

Implementation

void flipUp() {
  assert(_state != null,
      'Controller not attached to any Flipper. Seems that you forget to attach controller to Flipper.');
  assert(
      (dragAxis != DragAxis.horizontal),
      'Cannot call flipUp() when the dragAxis is set to DragAxis.horizontal!'
      '\nUse DragAxis.vertical or DragAxis.both');

  ///For DragAxis.both
  ///Initialising the unused animation with the current value.

  if (dragAxis == DragAxis.both) {
    _state!.animationHorizontal =
        AlwaysStoppedAnimation<double>(_state!.dragHorizontal);
  }

  _state!.animationVertical = Tween<double>(
    begin: _state!.isInverted ? 180 : 360,
    end: _state!.isInverted ? 0 : 180,
  ).animate(_state!.animationController);

  _state!.animationController.forward(from: 0.0);
}