flutter_echarts 1.2.3 
flutter_echarts: ^1.2.3 copied to clipboard
A data visualization charts library, based on Echarts, able to build advanced charts like WebGL 3D, GIS map, etc.
import 'dart:async';
import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:flutter_echarts/flutter_echarts.dart';
import 'package:number_display/number_display.dart';
import './liquid_script.dart' show liquidScript;
import './gl_script.dart' show glScript;
final display = createDisplay(decimal: 2);
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key}) : super(key: key);
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
List<Map<String, Object>> _data1 = [{ 'name': 'Please wait', 'value': 0 }];
getData1() async {
await Future.delayed(Duration(seconds: 4));
const dataObj = [{
'name': 'Jan',
'value': 8726.2453,
}, {
'name': 'Feb',
'value': 2445.2453,
}, {
'name': 'Mar',
'value': 6636.2400,
}, {
'name': 'Apr',
'value': 4774.2453,
}, {
'name': 'May',
'value': 1066.2453,
}, {
'name': 'Jun',
'value': 4576.9932,
}, {
'name': 'Jul',
'value': 8926.9823,
}];
this.setState(() { this._data1 = dataObj;});
}
@override
void initState() {
super.initState();
this.getData1();
}
@override
Widget build(BuildContext context) {
return Scaffold(
key: _scaffoldKey,
appBar: AppBar(
title: Text('Echarts Demon'),
),
backgroundColor: Colors.white,
body: SingleChildScrollView(
child: Center(
child: Column(
children: <Widget>[
Padding(
child: Text('Reactive updating and tap event', style: TextStyle(fontSize: 20)),
padding: EdgeInsets.fromLTRB(0, 40, 0, 20),
),
Text('- data will be fetched in a few seconds'),
Text('- tap the bar and trigger the snack'),
Container(
child: Echarts(
option: '''
{
dataset: {
dimensions: ['name', 'value'],
source: ${jsonEncode(_data1)},
},
color: ['#3398DB'],
legend: {
data: ['直接访问', '背景'],
show: false,
},
grid: {
left: '0%',
right: '0%',
bottom: '5%',
top: '7%',
height: '85%',
containLabel: true,
z: 22,
},
xAxis: [{
type: 'category',
gridIndex: 0,
axisTick: {
show: false,
},
axisLine: {
lineStyle: {
color: '#0c3b71',
},
},
axisLabel: {
show: true,
color: 'rgb(170,170,170)',
formatter: function xFormatter(value, index) {
if (index === 6) {
return `\${value}\\n*`;
}
return value;
},
},
}],
yAxis: {
type: 'value',
gridIndex: 0,
splitLine: {
show: false,
},
axisTick: {
show: false,
},
axisLine: {
lineStyle: {
color: '#0c3b71',
},
},
axisLabel: {
color: 'rgb(170,170,170)',
},
splitNumber: 12,
splitArea: {
show: true,
areaStyle: {
color: ['rgba(250,250,250,0.0)', 'rgba(250,250,250,0.05)'],
},
},
},
series: [{
name: '合格率',
type: 'bar',
barWidth: '50%',
xAxisIndex: 0,
yAxisIndex: 0,
itemStyle: {
normal: {
barBorderRadius: 5,
color: {
type: 'linear',
x: 0,
y: 0,
x2: 0,
y2: 1,
colorStops: [
{
offset: 0, color: '#00feff',
},
{
offset: 1, color: '#027eff',
},
{
offset: 1, color: '#0286ff',
},
],
},
},
},
zlevel: 11,
}],
}
''',
extraScript: '''
chart.on('click', (params) => {
if(params.componentType === 'series') {
Messager.postMessage(JSON.stringify({
type: 'select',
payload: params.dataIndex,
}));
}
});
''',
onMessage: (String message) {
Map<String, Object> messageAction = jsonDecode(message);
print(messageAction);
if (messageAction['type'] == 'select') {
final item = _data1[messageAction['payload']];
_scaffoldKey.currentState.showSnackBar(
SnackBar(
content: Text(item['name'].toString() + ': ' + display(item['value'])),
duration: Duration(seconds: 2),
));
}
},
),
width: 300,
height: 250,
),
Padding(
child: Text('Using WebGL for 3D charts', style: TextStyle(fontSize: 20)),
padding: EdgeInsets.fromLTRB(0, 40, 0, 20),
),
Text('- chart capture all gestures'),
Container(
child: Echarts(
extensions: [glScript],
captureAllGestures: true,
option: '''
{
tooltip: {},
visualMap: {
max: 20,
inRange: {
color: ['#313695', '#4575b4', '#74add1', '#abd9e9', '#e0f3f8', '#ffffbf', '#fee090', '#fdae61', '#f46d43', '#d73027', '#a50026']
}
},
xAxis3D: {
type: 'category',
data: ['12a', '1a', '2a', '3a', '4a', '5a', '6a',
'7a', '8a', '9a','10a','11a',
'12p', '1p', '2p', '3p', '4p', '5p',
'6p', '7p', '8p', '9p', '10p', '11p'],
},
yAxis3D: {
type: 'category',
data: ['Saturday', 'Friday', 'Thursday',
'Wednesday', 'Tuesday', 'Monday', 'Sunday'],
},
zAxis3D: {
type: 'value'
},
grid3D: {
boxWidth: 200,
boxDepth: 80,
viewControl: {
// projection: 'orthographic'
},
light: {
main: {
intensity: 1.2,
shadow: true
},
ambient: {
intensity: 0.3
}
}
},
series: [{
type: 'bar3D',
data: [[0,0,5],[0,1,1],[0,2,0],[0,3,0],[0,4,0],[0,5,0],[0,6,0],
[0,7,0],[0,8,0],[0,9,0],[0,10,0],[0,11,2],[0,12,4],[0,13,1],
[0,14,1],[0,15,3],[0,16,4],[0,17,6],[0,18,4],[0,19,4],[0,20,3],
[0,21,3],[0,22,2],[0,23,5],[1,0,7],[1,1,0],[1,2,0],[1,3,0],
[1,4,0],[1,5,0],[1,6,0],[1,7,0],[1,8,0],[1,9,0],[1,10,5],
[1,11,2],[1,12,2],[1,13,6],[1,14,9],[1,15,11],[1,16,6],[1,17,7],
[1,18,8],[1,19,12],[1,20,5],[1,21,5],[1,22,7],[1,23,2],[2,0,1],
[2,1,1],[2,2,0],[2,3,0],[2,4,0],[2,5,0],[2,6,0],[2,7,0],[2,8,0],
[2,9,0],[2,10,3],[2,11,2],[2,12,1],[2,13,9],[2,14,8],[2,15,10],
[2,16,6],[2,17,5],[2,18,5],[2,19,5],[2,20,7],[2,21,4],[2,22,2],
[2,23,4],[3,0,7],[3,1,3],[3,2,0],[3,3,0],[3,4,0],[3,5,0],[3,6,0],
[3,7,0],[3,8,1],[3,9,0],[3,10,5],[3,11,4],[3,12,7],[3,13,14],[3,14,13],
[3,15,12],[3,16,9],[3,17,5],[3,18,5],[3,19,10],[3,20,6],[3,21,4],[3,22,4],
[3,23,1],[4,0,1],[4,1,3],[4,2,0],[4,3,0],[4,4,0],[4,5,1],[4,6,0],[4,7,0],
[4,8,0],[4,9,2],[4,10,4],[4,11,4],[4,12,2],[4,13,4],[4,14,4],[4,15,14],
[4,16,12],[4,17,1],[4,18,8],[4,19,5],[4,20,3],[4,21,7],[4,22,3],[4,23,0],
[5,0,2],[5,1,1],[5,2,0],[5,3,3],[5,4,0],[5,5,0],[5,6,0],[5,7,0],[5,8,2],
[5,9,0],[5,10,4],[5,11,1],[5,12,5],[5,13,10],[5,14,5],[5,15,7],[5,16,11],
[5,17,6],[5,18,0],[5,19,5],[5,20,3],[5,21,4],[5,22,2],[5,23,0],[6,0,1],
[6,1,0],[6,2,0],[6,3,0],[6,4,0],[6,5,0],[6,6,0],[6,7,0],[6,8,0],[6,9,0],
[6,10,1],[6,11,0],[6,12,2],[6,13,1],[6,14,3],[6,15,4],[6,16,0],[6,17,0],
[6,18,0],[6,19,0],[6,20,1],[6,21,2],[6,22,2],[6,23,6]]
.map(function (item) {
return {
value: [item[1], item[0], item[2]],
}
}),
shading: 'lambert',
label: {
textStyle: {
fontSize: 16,
borderWidth: 1
}
},
emphasis: {
label: {
textStyle: {
fontSize: 20,
color: '#900'
}
},
itemStyle: {
color: '#900'
}
}
}]
}
''',
),
width: 300,
height: 250,
),
Padding(
child: Text('Data zoom', style: TextStyle(fontSize: 20)),
padding: EdgeInsets.fromLTRB(0, 40, 0, 20),
),
Text('- chart capture all gestures'),
Container(
child: Echarts(
captureAllGestures: true,
extraScript: '''
var base = +new Date(1968, 9, 3);
var oneDay = 24 * 3600 * 1000;
var date = [];
var data = [Math.random() * 300];
for (var i = 1; i < 20000; i++) {
var now = new Date(base += oneDay);
date.push([now.getFullYear(), now.getMonth() + 1, now.getDate()].join('/'));
data.push(Math.round((Math.random() - 0.5) * 20 + data[i - 1]));
}
''',
option: '''
{
tooltip: {
trigger: 'axis',
position: function (pt) {
return [pt[0], '10%'];
}
},
toolbox: {
feature: {
dataZoom: {
yAxisIndex: 'none'
},
restore: {},
saveAsImage: {}
}
},
xAxis: {
type: 'category',
boundaryGap: false,
data: date
},
yAxis: {
type: 'value',
boundaryGap: [0, '100%']
},
dataZoom: [{
type: 'inside',
start: 0,
end: 10
}, {
start: 0,
end: 10,
handleIcon: 'M10.7,11.9v-1.3H9.3v1.3c-4.9,0.3-8.8,4.4-8.8,9.4c0,5,3.9,9.1,8.8,9.4v1.3h1.3v-1.3c4.9-0.3,8.8-4.4,8.8-9.4C19.5,16.3,15.6,12.2,10.7,11.9z M13.3,24.4H6.7V23h6.6V24.4z M13.3,19.6H6.7v-1.4h6.6V19.6z',
handleSize: '80%',
handleStyle: {
color: '#fff',
shadowBlur: 3,
shadowColor: 'rgba(0, 0, 0, 0.6)',
shadowOffsetX: 2,
shadowOffsetY: 2
}
}],
series: [
{
name: 'data',
type: 'line',
smooth: true,
symbol: 'none',
sampling: 'average',
itemStyle: {
color: 'rgb(255, 70, 131)'
},
areaStyle: {
color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{
offset: 0,
color: 'rgb(255, 158, 68)'
}, {
offset: 1,
color: 'rgb(255, 70, 131)'
}])
},
data: data
}
]
}
''',
),
width: 300,
height: 250,
),
Padding(
child: Text('Using extension', style: TextStyle(fontSize: 20)),
padding: EdgeInsets.fromLTRB(0, 40, 0, 0),
),
Container(
child: Echarts(
extensions: [liquidScript],
option: '''
{
grid: {
left: '0%',
right: '0%',
bottom: '0%',
top: '0%',
},
series: [{
type: 'liquidFill',
data: [0.6]
}]
}
''',
),
width: 300,
height: 250,
),
],
),
),
),
);
}
}Metadata
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popularity
Publisher
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Metadata
A data visualization charts library, based on Echarts, able to build advanced charts like WebGL 3D, GIS map, etc.
Repository (GitHub)
View/report issues
License
unknown (license)
