getDesiredGestures method
Gets distinct set of gestures this chart will subscribe to.
This is needed to allow setup of the GestureDetector widget with only
gestures we need to listen to and it must wrap ChartContainer
widget.
Gestures are then setup to be proxied in common.BaseChart
and that is
held by ChartContainerRenderObject
.
Implementation
Set<GestureType> getDesiredGestures(BaseChartState chartState) {
final types = <GestureType>{};
behaviors?.forEach((behavior) {
types.addAll(behavior.desiredGestures);
});
if (defaultInteractions && chartState.autoBehaviorWidgets.isEmpty) {
addDefaultInteractions(chartState.autoBehaviorWidgets);
}
for (final behavior in chartState.autoBehaviorWidgets) {
types.addAll(behavior.desiredGestures);
}
return types;
}