handleScrollEvent method

void handleScrollEvent(
  1. PointerScrollEvent event
)

Implementation

void handleScrollEvent(PointerScrollEvent event) {
  if (null == _old1 && null == _old2) {
    if (event.scrollDelta.dy < 0) {
      scale -= 0.05;
    } else if (event.scrollDelta.dy > 0) {
      scale += 0.05;
    }
  } else if (!limitations) {
    if (event.scrollDelta.dy < 0) {
      rotate1 -= 0.05;
    } else if (event.scrollDelta.dy > 0) {
      rotate1 += 0.05;
    }
  }
  markNeedsPaint();
}