Track in Flutter Range Slider (SfRangeSlider)

4 May 202117 minutes to read

This section helps to learn about how to customize the track in the range slider.

Track color

You can change the active and inactive track color of the range slider using the activeTrackColor and inactiveTrackColor properties respectively.

The active side of the range slider is between start and end thumbs.

The inactive side of the range slider is between the min value and the left thumb, and the right thumb and the max value.

For RTL, the inactive side is between the max value and the left thumb, and the right thumb and the min value.

NOTE

You must import the theme.dart library from the Core package to use SfRangeSliderTheme.

Horizontal

DART

SfRangeValues _values = SfRangeValues(4.0, 7.0);

@override
Widget build(BuildContext context) {
  return MaterialApp(
      home: Scaffold(
          body: Center(
              child: SfRangeSliderTheme(
                    data: SfRangeSliderThemeData(
                        activeTrackColor: Colors.red,
                        inactiveTrackColor: Colors.red[100],
                    ),
                    child:  SfRangeSlider(
                        min: 2.0,
                        max: 10.0,
                        values: _values,
                        onChanged: (SfRangeValues newValues){
                            setState(() {
                                _values = newValues;
                            });
                        },
                    ),
              )
          )
      )
  );
}

Vertical

DART

SfRangeValues _values = SfRangeValues(4.0, 7.0);

@override
Widget build(BuildContext context) {
  return MaterialApp(
      home: Scaffold(
          body: Center(
              child: SfRangeSliderTheme(
                    data: SfRangeSliderThemeData(
                        activeTrackColor: Colors.red,
                        inactiveTrackColor: Colors.red[100],
                    ),
                    child:  SfRangeSlider.vertical(
                        min: 2.0,
                        max: 10.0,
                        values: _values,
                        onChanged: (SfRangeValues newValues){
                            setState(() {
                                _values = newValues;
                            });
                        },
                    ),
              )
          )
      )
  );
}

Track height

You can change the track height of the range slider using the activeTrackHeight and the inactiveTrackHeight properties. The default value of the activeTrackHeight and the inactiveTrackHeight properties are 6.0 and 4.0.

NOTE

You must import the theme.dart library from the Core package to use SfRangeSliderTheme.

Horizontal

DART

SfRangeValues _values = SfRangeValues(4.0, 7.0);

@override
Widget build(BuildContext context) {
  return MaterialApp(
      home: Scaffold(
          body: Center(
              child: SfRangeSliderTheme(
                    data: SfRangeSliderThemeData(
                        activeTrackHeight: 8,
                        inactiveTrackHeight: 8,
                    ),
                    child:  SfRangeSlider(
                        min: 2.0,
                        max: 10.0,
                        values: _values,
                        onChanged: (SfRangeValues newValues){
                            setState(() {
                                _values = newValues;
                            });
                        },
                    ),
              )
          )
      )
  );
}

Vertical

DART

SfRangeValues _values = SfRangeValues(4.0, 7.0);

@override
Widget build(BuildContext context) {
  return MaterialApp(
      home: Scaffold(
          body: Center(
              child: SfRangeSliderTheme(
                    data: SfRangeSliderThemeData(
                        activeTrackHeight: 8,
                        inactiveTrackHeight: 8,
                    ),
                    child:  SfRangeSlider.vertical(
                        min: 2.0,
                        max: 10.0,
                        values: _values,
                        onChanged: (SfRangeValues newValues){
                            setState(() {
                                _values = newValues;
                            });
                        },
                    ),
              )
          )
      )
  );
}

Track corner radius

You can change the corner of the track to be round in the range slider using the trackCornerRadius property. The default value of the trackCornerRadius property is 1.0.

NOTE

You must import the theme.dart library from the Core package to use SfRangeSliderTheme.

Horizontal

DART

SfRangeValues _values = SfRangeValues(4.0, 7.0);

@override
Widget build(BuildContext context) {
  return MaterialApp(
      home: Scaffold(
          body: Center(
              child: SfRangeSliderTheme(
                    data: SfRangeSliderThemeData(
                        activeTrackHeight: 10,
                        inactiveTrackHeight: 10,
                        trackCornerRadius: 5,
                    ),
                    child: SfRangeSlider(
                        min: 2.0,
                        max: 10.0,
                        values: _values,
                        onChanged: (SfRangeValues newValues){
                            setState(() {
                                _values = newValues;
                            });
                        },
                    ),
              )
          )
      )
  );
}

Vertical

DART

SfRangeValues _values = SfRangeValues(4.0, 7.0);

@override
Widget build(BuildContext context) {
  return MaterialApp(
      home: Scaffold(
          body: Center(
              child: SfRangeSliderTheme(
                    data: SfRangeSliderThemeData(
                        activeTrackHeight: 10,
                        inactiveTrackHeight: 10,
                        trackCornerRadius: 5,
                    ),
                    child: SfRangeSlider.vertical(
                        min: 2.0,
                        max: 10.0,
                        values: _values,
                        onChanged: (SfRangeValues newValues){
                            setState(() {
                                _values = newValues;
                            });
                        },
                    ),
              )
          )
      )
  );
}