onChangeStart property

  1. @override
ValueChanged<double>? onChangeStart
final

Signature for a callback that reports the value of a marker pointer has started to change.

This snippet shows how to call onChangeStart callback in SfLinearGauge.


SfLinearGauge(
markerPointers: [
LinearShapePointer(
value: _pointerValue,
onChangeStart: (double startValue) {
    print('Start value $startValue');
  },
)])

Implementation

@override
final ValueChanged<double>? onChangeStart;