dh_slider 1.0.0 dh_slider: ^1.0.0 copied to clipboard
A handy slider that supports color and image settings for thumb and track.
import 'dart:async';
import 'dart:math';
import 'dart:ui' as ui;
import 'package:dh_slider/dh_slider.dart';
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'DHSlider',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: SliderPage(title: 'DHSlider'),
);
}
}
class SliderPage extends StatefulWidget {
SliderPage({Key? key, required this.title}) : super(key: key);
final String title;
@override
_SliderPageState createState() => _SliderPageState();
}
class _SliderPageState extends State<SliderPage> {
double slider = 0.0;
Future<ui.Image>? sliderFuture;
@override
void initState() {
super.initState();
sliderFuture = getImageFuture(AssetImage("images/slider_bck.png"));
}
@override
Widget build(BuildContext context) {
var dhSlider = DHSlider(
thumbBorderSide: BorderSide.none,
thumbColor: Colors.redAccent,
trackHeight: 46,
margin: EdgeInsets.only(left: 10, right: 10, top: 20),
value: slider,
label: "$slider",
indicator: Indicator(rectRadius: 10, labelPadding: 18),
indicatorStyle: IndicatorStyle(
backgroundColor: Colors.red,
shadowColor: Colors.black,
elevation: 12.0,
reverse: true,
angle: pi),
showValueIndicator: ShowValueIndicator.always,
onChangeEnd: (double value) {
print("onChangeEnd: $value");
this.setState(() {
slider = value;
});
},
onChangeStart: (double value) {
this.setState(() {
slider = value;
});
print("onChangeStart: $value");
},
onChanged: (double value) {
this.setState(() {
slider = value;
});
print("onChanged: $value");
});
Widget fbSlider = FutureBuilder(
future: sliderFuture,
builder: (BuildContext context, AsyncSnapshot<ui.Image> snapshot) {
return DHSlider(
value: slider,
trackHeight: 12,
trackShape: DHSliderTrackShape(image: snapshot.data, padTrack: false),
activeTrackColor: Colors.transparent,
inactiveTrackColor: Colors.transparent,
disabledActiveTrackColor: Colors.transparent,
disabledInactiveTrackColor: Colors.transparent,
thumbColor: Colors.yellowAccent.withOpacity(0.2),
disabledThumbColor: Colors.white,
enabledThumbRadius: 12,
margin: EdgeInsets.only(left: 10, right: 10, top: 30),
thumbBorderSide: BorderSide(
width: 0.6,
color: Colors.red,
),
onChanged: (value) {
print("onChange: $value");
this.setState(() => slider = value);
},
onChangeStart: (value) {
print("onChangeStart: $value");
this.setState(() => slider = value);
},
onChangeEnd: (value) {
print("onChangeEnd: $value");
this.setState(() => slider = value);
},
min: 0,
max: 1,
);
},
);
Widget spaceSlider = DHSlider(
value: slider,
trackHeight: 46,
thumbBorderSide: BorderSide(width: 4, color: Color(0xFF31C2A6)),
activeTrackColor: Color(0x8031C2A6),
inactiveTrackColor: Color(0xFFF70000),
thumbColor: Colors.yellowAccent.withOpacity(0.2),
disabledThumbColor: Colors.transparent,
backgroundColor: Colors.transparent,
enabledThumbRadius: 21,
trackShape: DHSliderTrackShape(padTrack: false),
onChanged: (value) {
this.setState(() => slider = value);
},
onChangeStart: (value) {
this.setState(() => slider = value);
},
onChangeEnd: (value) {
this.setState(() => slider = value);
},
min: 0.0,
max: 1.0,
);
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: ListView(
padding: EdgeInsets.symmetric(horizontal: 30),
children: <Widget>[
dhSlider,
fbSlider,
SizedBox(height: 20),
spaceSlider,
],
),
);
}
Future<ui.Image> getImageFuture(
ImageProvider provider, {
ImageConfiguration config = ImageConfiguration.empty,
}) {
//new Completer
Completer<ui.Image> completer = Completer<ui.Image>();
ImageStreamListener? listener;
//获取图片流
ImageStream stream = provider.resolve(config);
listener = ImageStreamListener((ImageInfo frame, bool sync) {
//stream 流监听
final ui.Image image = frame.image;
//完成事件
completer.complete(image);
//移除监听
stream.removeListener(listener!);
});
//添加监听
stream.addListener(listener);
//返回image
return completer.future;
}
}