flutter_ruler_slider 0.0.3

Customizable horizontal ruler slider with snapping, labels, and tick styling for Flutter.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter_ruler_slider/flutter_ruler_slider.dart';

void main() => runApp(const RulerExample());

class RulerExample extends StatefulWidget {
  const RulerExample({super.key});

  @override
  State<RulerExample> createState() => _RulerExampleState();
}

class _RulerExampleState extends State<RulerExample> {
  double _value = 36;

  List<int> _computeMidpoints({
    required int minValue,
    required int maxValue,
    required int interval,
  }) {
    final List<int> results = <int>[];
    int start = minValue;
    while (start + interval <= maxValue) {
      final int end = start + interval;
      final int mid = ((start + end) / 2).round();
      if (mid >= minValue && mid <= maxValue) {
        results.add(mid);
      }
      start = end;
    }
    return results;
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Center(
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              FlutterRulerSlider(
                minValue: 20,
                maxValue: 100,
                initialValue: 36,
                width: 300,
                interval: 10,
                smallerInterval: 10,
                snapping: true,
                showLabels: true,
                showSubLabels: false,
                labelSpacing: 6,
                labelRotation: 0,
                tickSpacing: 20,
                matchValues: _computeMidpoints(
                  minValue: 20,
                  maxValue: 100,
                  interval: 10,
                ),
                tickStyle: const RulerTickStyle(
                  majorHeight: 30,
                  minorHeight: 15,
                  majorThickness: 2,
                  minorThickness: 1,
                  majorColor: Colors.black,
                  minorColor: Colors.black,
                  matchColor: Colors.transparent,
                ),
                onValueChanged: (v) {
                  setState(() => _value = v);
                },
              ),
              const SizedBox(height: 12),
              Text(
                'Selected: ${_value.toStringAsFixed(1)}',
                style: const TextStyle(fontSize: 16),
              ),
            ],
          ),
        ),
      ),
    );
  }
}