onPanUpdateGesture method

void onPanUpdateGesture(
  1. Offset globalPosition
)

Implementation

void onPanUpdateGesture(Offset globalPosition) {
  _adjustPositionOnPanUpdate(globalPosition.dx, globalPosition.dy);
  if (_pageWidth.value > 0) {
    _xOffsetRatio = xOffset.value / _pageWidth.value;
  }
  if (_pageHeight.value > 0) {
    _yOffsetRatio = yOffset.value / _pageHeight.value;
  }
}