CODEWITHSUNDEEP
flutterdartslidermaterial-design
Ουιλιαμ Αρκευα
Ουιλιαμ Αρκευα

Reputation: 6229

How to evenly change track height for slider in Flutter?

My code:

          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 12),
            child: SliderTheme(
              data: SliderTheme.of(context).copyWith(
                inactiveTrackColor: Color(0xff8d8e98),
                activeTrackColor: Colors.white,
                thumbColor: Color(0xffeb1555),
                overlayColor: Color(0x29eb1555),
                thumbShape: RoundSliderThumbShape(enabledThumbRadius: 15),
                overlayShape: RoundSliderOverlayShape(overlayRadius: 30),
                trackHeight: 2,                                             
              ),
              child: Slider(
                value: 183,
                min: 10,
                max: 270,
                onChanged: (double value) {},
              ),
            ),
          ),

I got this:

bad

I expected this:

OK

How can I get it?

Upvotes: 13

Views: 6429

Answers (3)

TheMisplacedMechEngineer
TheMisplacedMechEngineer

Reputation: 619

If you must use the RoundedRectSliderTrackShape() specifically as you need the rounded edge, then simply create a CustomTrackShape() and override the value of additionalActiveTrackHeight to 0.

class CustomTrackShape extends RoundedRectSliderTrackShape {
 
  @override
  void paint(PaintingContext context, Offset offset,
      {required RenderBox parentBox,
      required SliderThemeData sliderTheme,
      required Animation<double> enableAnimation,
      required TextDirection textDirection,
      required Offset thumbCenter,
      bool isDiscrete = false,
      bool isEnabled = false,
      double additionalActiveTrackHeight = 2}) {

    super.paint(context, offset,
        parentBox: parentBox,
        sliderTheme: sliderTheme,
        enableAnimation: enableAnimation,
        textDirection: textDirection,
        thumbCenter: thumbCenter,
        isDiscrete: isDiscrete,
        isEnabled: isEnabled,
        additionalActiveTrackHeight: 0);
  }

}

Upvotes: 16

Jorgercg
Jorgercg

Reputation: 366

This is a liitle bit late, but, as I just solved that to myself, I thought it could be useful to others:

You should include, in the SliderTheme data the following:

trackShape: RectangularSliderTrackShape(),

And that is it, you will get both active and inactive track with the same height!

Upvotes: 24

Ravi Garg
Ravi Garg

Reputation: 1534

Just update trackHeight to 1. This would make it better.

Padding(
            padding: const EdgeInsets.symmetric(horizontal: 12),
            child: SliderTheme(
              data: SliderTheme.of(context).copyWith(
                inactiveTrackColor: Color(0xff8d8e98),
                activeTrackColor: Colors.white,
                thumbColor: Color(0xffeb1555),
                overlayColor: Color(0x29eb1555),
                thumbShape: RoundSliderThumbShape(enabledThumbRadius: 15),
                overlayShape: RoundSliderOverlayShape(overlayRadius: 30),
                trackHeight: 1,                                             
              ),
              child: Slider(
                value: 183,
                min: 10,
                max: 270,
                onChanged: (double value) {},
              ),
            ),
          ),

Upvotes: 4

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