onChangeStart property
final
Called when the user starts selecting a new value for the slider.
This callback shouldn't be used to update the slider value (use onChanged for that), but rather to be notified when the user has started selecting a new value by starting a drag or with a tap.
The value passed will be the last value that the slider had before the change began.
link
Slider(
value: _duelCommandment.toDouble(),
min: 1.0,
max: 10.0,
divisions: 10,
label: '$_duelCommandment',
onChanged: (double newValue) {
setState(() {
_duelCommandment = newValue.round();
});
},
onChangeStart: (double startValue) {
print('Started change at $startValue');
},
)
See also:
- onChangeEnd for a callback that is called when the value change is complete.
Implementation
final ValueChanged<double>? onChangeStart;