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polar_interval.dart
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polar_interval.dart
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import 'package:flutter/material.dart';
import 'package:graphic/graphic.dart';
import '../data.dart';
class PolarIntervalPage extends StatelessWidget {
PolarIntervalPage({Key? key}) : super(key: key);
final GlobalKey<ScaffoldState> _scaffoldKey = GlobalKey<ScaffoldState>();
@override
Widget build(BuildContext context) {
return Scaffold(
key: _scaffoldKey,
appBar: AppBar(
title: const Text('Polar Interval Element'),
),
backgroundColor: Colors.white,
body: SingleChildScrollView(
child: Center(
child: Column(
children: <Widget>[
Container(
child: const Text(
'Pie Chart',
style: TextStyle(fontSize: 20),
),
padding: const EdgeInsets.fromLTRB(20, 40, 20, 5),
),
Container(
margin: const EdgeInsets.only(top: 10),
width: 350,
height: 300,
child: Chart(
data: basicData,
variables: {
'genre': Variable(
accessor: (Map map) => map['genre'] as String,
),
'sold': Variable(
accessor: (Map map) => map['sold'] as num,
),
},
transforms: [
Proportion(
variable: 'sold',
as: 'percent',
)
],
elements: [
IntervalElement(
position: Varset('percent') / Varset('genre'),
label: LabelAttr(
encoder: (tuple) => Label(
tuple['sold'].toString(),
LabelStyle(Defaults.runeStyle),
)),
color: ColorAttr(
variable: 'genre', values: Defaults.colors10),
modifiers: [StackModifier()],
)
],
coord: PolarCoord(transposed: true, dimCount: 1),
),
),
Container(
child: const Text(
'Rose Chart',
style: TextStyle(fontSize: 20),
),
padding: const EdgeInsets.fromLTRB(20, 40, 20, 5),
),
Container(
child: const Text(
'- With corner radius and shadow elevation.',
),
padding: const EdgeInsets.fromLTRB(10, 5, 10, 0),
alignment: Alignment.centerLeft,
),
Container(
margin: const EdgeInsets.only(top: 10),
width: 350,
height: 300,
child: Chart(
data: roseData,
variables: {
'name': Variable(
accessor: (Map map) => map['name'] as String,
),
'value': Variable(
accessor: (Map map) => map['value'] as num,
scale: LinearScale(min: 0, marginMax: 0.1),
),
},
elements: [
IntervalElement(
label: LabelAttr(
encoder: (tuple) => Label(tuple['name'].toString())),
shape: ShapeAttr(
value: RectShape(
borderRadius:
const BorderRadius.all(Radius.circular(10)),
)),
color: ColorAttr(
variable: 'name', values: Defaults.colors10),
elevation: ElevationAttr(value: 5),
)
],
coord: PolarCoord(startRadius: 0.15),
),
),
Container(
child: const Text(
'Stacked Rose Chart',
style: TextStyle(fontSize: 20),
),
padding: const EdgeInsets.fromLTRB(20, 40, 20, 5),
),
Container(
child: const Text(
'- A multiple variabes tooltip anchord top-left.',
),
padding: const EdgeInsets.fromLTRB(10, 5, 10, 0),
alignment: Alignment.centerLeft,
),
Container(
margin: const EdgeInsets.only(top: 10),
width: 350,
height: 300,
child: Chart(
data: adjustData,
variables: {
'index': Variable(
accessor: (Map map) => map['index'].toString(),
),
'type': Variable(
accessor: (Map map) => map['type'] as String,
),
'value': Variable(
accessor: (Map map) => map['value'] as num,
scale: LinearScale(min: 0, max: 1800),
),
},
elements: [
IntervalElement(
position: Varset('index') * Varset('value') / Varset('type'),
color: ColorAttr(
variable: 'type', values: Defaults.colors10),
modifiers: [StackModifier()],
)
],
coord: PolarCoord(),
axes: [
Defaults.circularAxis,
Defaults.radialAxis..label = null,
],
selections: {
'tap': PointSelection(
variable: 'index',
)
},
tooltip: TooltipGuide(
multiTuples: true,
anchor: (_) => Offset.zero,
align: Alignment.bottomRight,
),
),
),
Container(
child: const Text(
'Race Chart',
style: TextStyle(fontSize: 20),
),
padding: const EdgeInsets.fromLTRB(20, 40, 20, 5),
),
Container(
margin: const EdgeInsets.only(top: 10),
width: 350,
height: 300,
child: Chart(
data: basicData,
variables: {
'genre': Variable(
accessor: (Map map) => map['genre'] as String,
),
'sold': Variable(
accessor: (Map map) => map['sold'] as num,
scale: LinearScale(min: 0),
),
},
elements: [
IntervalElement(
label: LabelAttr(
encoder: (tuple) => Label(tuple['sold'].toString())),
color: ColorAttr(
variable: 'genre',
values: Defaults.colors10,
),
)
],
coord: PolarCoord(transposed: true),
axes: [
Defaults.radialAxis..label = null,
Defaults.circularAxis,
],
),
),
],
),
),
),
);
}
}