show method
Displays the trackball at the specified x and y-positions.
Implementation
void show(double x, double y) {
if (_trackballPainter != null &&
activationMode != ActivationMode.none &&
x != null &&
y != null) {
_trackballPainter.generateAllPoints(Offset(x, y));
_trackballPainter.canResetPath = false;
_trackballPainter.chart._chartState.trackballRepaintNotifier.value++;
}
}