onScaleStart method
Called when the user starts a scale gesture.
Implementation
@mustCallSuper
void onScaleStart(ScaleStartEvent event) {
event.deliverAtPoint(
rootComponent: game,
eventHandler: (ScaleCallbacks component) {
_scaleRecords.add(TaggedComponent(event.pointerId, component));
component.onScaleStart(event);
},
);
}