onChangeStart property

ValueChanged<double>? onChangeStart
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.

See also:

  • onChangeEnd for a callback that is called when the value change is complete.

Implementation

final ValueChanged<double>? onChangeStart;