onLinkTapUp method
Implementation
@override
void onLinkTapUp(String linkId, TapUpDetails details) {
hideLinkOption();
canvasWriter.model.hideAllLinkJoints();
canvasWriter.model.showLinkJoints(linkId);
showLinkOption(linkId,
canvasReader.state.fromCanvasCoordinates(details.localPosition));
}