Want to customize Slider widget in Flutter? Use the below example to customize Slider widget in Flutter.
Here is an example:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 | import 'dart:math'; import 'package:flutter/material.dart'; List<int> bars = []; const barWidth = 5.0; double screenWidth; int numberOfBars; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( home: Home(), ); } } void randomNumberGenerator() { Random r = Random(); for (var i = 0; i < numberOfBars; i++) { bars.add(r.nextInt(40) + 10); } } class Home extends StatelessWidget { @override Widget build(BuildContext context) { if (bars.isEmpty) { screenWidth = MediaQuery.of(context).size.width; numberOfBars = screenWidth ~/ barWidth; randomNumberGenerator(); } return Container(child: WaveSlider()); } } class WaveSlider extends StatefulWidget { @override State<StatefulWidget> createState() => WaveSliderState(); } class WaveSliderState extends State<WaveSlider> { double bar2Position = 180.0; _onTapDown(TapDownDetails details) { var x = details.globalPosition.dx; print("tap down " + x.toString()); setState(() { bar2Position = x; }); } @override Widget build(BuildContext context) { int barItem = 0; return Scaffold( body: Center( child: Stack( alignment: Alignment.centerLeft, children: <Widget>[ GestureDetector( onTapDown: (TapDownDetails details) => _onTapDown(details), onHorizontalDragUpdate: (DragUpdateDetails details) { setState(() { bar2Position = details.globalPosition.dx; }); }, child: Container( child: Row( crossAxisAlignment: CrossAxisAlignment.end, mainAxisAlignment: MainAxisAlignment.start, children: bars.map((int height) { Color color = barItem + 1 < bar2Position / barWidth ? Colors.deepPurple : Colors.blueGrey; barItem++; return Container( color: color, height: height.toDouble(), width: 5.0, ); }).toList(), ), ), ), ], ), ), ); } } |
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