Flutter蜡烛图绘制插件flutter_simple_candlesticks的使用

Flutter蜡烛图绘制插件flutter_simple_candlesticks的使用

插件介绍

flutter_simple_candlesticks 是一个用于在Flutter中绘制蜡烛图的插件。它提供了优雅的蜡烛图图表，支持非滚动和可滚动两种模式。

示例代码

下面是一个完整的示例代码，展示了如何使用flutter_simple_candlesticks插件来绘制蜡烛图。

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

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter candlestick',
      theme: ThemeData(
          scaffoldBackgroundColor: const Color(0xFF0b112e),
          appBarTheme: const AppBarTheme(backgroundColor: Color(0xFF0b112e), elevation: 0)),
      home: const MyHomePage(title: 'Flutter candlestick'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    const style = CandlestickChartStyle(
        yLegendStyle: CandlestickChartYLegendStyle(
            textStyle: TextStyle(color: Colors.white),
            numberOfLabels: 5,
            lineStyle: CandlestickChartLineStyle(width: 11, color: Colors.white)),
        candlestickStyle: CandlestickStyle(bullishColor: Color(0xFF38bbbf), bearishColor: Color(0xFFed7b9e)),
        candlestickSelectedStyle: CandlestickStyle(bullishColor: Color(0xff25787b), bearishColor: Color(0xff9d4963)));

    const style2 = CandlestickChartStyle(
        yLegendStyle: CandlestickChartYLegendStyle(
            textStyle: TextStyle(color: Colors.white),
            numberOfLabels: 5,
            lineStyle: CandlestickChartDashedLineStyle(width: 11, color: Colors.white)),
        candlestickStyle: CandlestickStyle(bullishColor: Color(0xFF38bbbf), bearishColor: Color(0xFFed7b9e)),
        candlestickSelectedStyle: CandlestickStyle(bullishColor: Color(0xff25787b), bearishColor: Color(0xff9d4963)));

    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.spaceAround,
            children: [
              CandlesticksChart&lt;CandleModel&gt;(
                height: 200,
                data: data,
                style: style,
                options: const CandlestickChartOptions(isScrollable: true),
                getHightCallback: (e) =&gt; e.hight,
                getCloseCallback: (e) =&gt; e.close,
                getLowCallback: (e) =&gt; e.low,
                getOpenCallback: (e) =&gt; e.open,
                getTimeCallback: (e) =&gt; e.date,
              ),
              CandlesticksChart&lt;CandleModel&gt;(
                height: 200,
                data: data,
                style: style2,
                getHightCallback: (e) =&gt; e.hight,
                getCloseCallback: (e) =&gt; e.close,
                getLowCallback: (e) =&gt; e.low,
                getOpenCallback: (e) =&gt; e.open,
                getTimeCallback: (e) =&gt; e.date,
              )
            ],
          ),
        ),
      ),
    );
  }
}

示例说明

1. 数据定义：首先定义了蜡烛图的数据。

const data = List<CandleModel>.from(List.generate(10, (index) => generateData(index))));

这里生成了一些示例数据，你可以根据需要替换为实际的数据。

1. 样式设置：设置了蜡烛图的样式，包括阳线和阴线的颜色、标签样式等。

const style = CandlestickChartStyle(
    yLegendStyle: CandlestickChartYLegendStyle(
        textStyle: TextStyle(color: Colors.white),
        numberOfLabels: 5,
        lineStyle: CandlestickChartLineStyle(width: 11, color: Colors.white)),
    candlestickStyle: CandlestickStyle(bullishColor: Color(0xFF38bbbf), bearishColor: Color(0xFFed7b9e)),
    candlestickSelectedStyle: CandlestickStyle(bullishColor: Color(0xff25787j), bearishColor: Color(0xff9d4963)));

1. 创建蜡烛图实例：通过CandlesticksChart构建蜡烛图实例，并传入相应的参数。

return Scaffold(
    appBar: AppBar(
      title: Text(widget.title),
    ),
    body: Padding(
      padding: const EdgeInsets.all(16.0),
      child: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.spaceAround,
          children: [
            CandlesticksChart<CandleModel>(
              height: 200,
              data: data,
              style: style,
              options: const CandlestickChartOptions(isScrollable: true),
              getHightCallback: (e) => e.hight,
              getCloseCallback: (e) => e.close,
              getLowCallback: (e) => e.low,
              getOpenCallback: (e) => e.open,
              getTimeCallback: (e) => e.date,
            ),
            CandlesticksChart<CandleModel>(
              height: 200,
              data: data,
              style: style2,
              getHightCallback: (e) => e.hight,
              getCloseCallback: (e) => e.close,
              getLowCallback: (e) => e.low,
              getOpenCallback: (e) => e.open,
              getTimeCallback: (e) => e.date,
            )
          ],
        ),
      ),
    ),
  );
);