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