Slider({Key key, @required double value, @required ValueChanged<double> onChanged, double min: 0.0, double max: 1.0, int divisions, String label, Color activeColor })

Creates a material design slider.

The slider itself does not maintain any state. Instead, when the state of the slider changes, the widget calls the onChanged callback. Most widgets that use a slider will listen for the onChanged callback and rebuild the slider with a new value to update the visual appearance of the slider.

  • value determines currently selected value for this slider.
  • onChanged is called when the user selects a new value for the slider.

Source 

Slider({
  Key key,
  @required this.value,
  @required this.onChanged,
  this.min: 0.0,
  this.max: 1.0,
  this.divisions,
  this.label,
  this.activeColor
}) : super(key: key) {
  assert(value != null);
  assert(min != null);
  assert(max != null);
  assert(value >= min && value <= max);
  assert(divisions == null || divisions > 0);
}