handleScrollEvent method
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();
}