feat:增加统计图表模块
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297
lib/widgets/chart.dart
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297
lib/widgets/chart.dart
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@@ -0,0 +1,297 @@
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import 'package:flutter/material.dart';
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import 'package:syncfusion_flutter_charts/charts.dart';
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class ChartData {
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final String name;
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final double value;
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ChartData({required this.name, required this.value});
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}
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Widget buildChartTitle(BuildContext context, String title) {
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return Row(
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children: [
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Icon(Icons.insert_chart, color: Theme.of(context).colorScheme.primary),
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Text(title),
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],
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);
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}
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Widget buildChartDivider(BuildContext context) {
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return Divider(
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height: 1,
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thickness: 1,
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color: Theme.of(context).colorScheme.primary,
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indent: 0,
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endIndent: 0,
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);
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}
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Widget lineChart({
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required BuildContext context,
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required String xAxisName,
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required String yAxisName,
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required String unit,
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required List<ChartData> data,
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}) {
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return SfCartesianChart(
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// 图表标题
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// title: ChartTitle(text: '2023年上半年销售额（万元）'),
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// X轴配置（类别轴）
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primaryXAxis: CategoryAxis(majorGridLines: MajorGridLines(width: 0)),
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// Y轴配置（数值轴）
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// primaryYAxis: NumericAxis(title: AxisTitle(text: '$yAxisName（$unit）')),
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// 启用图例
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legend: Legend(isVisible: true, position: LegendPosition.top),
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// 启用交互提示（点击数据点显示详情）
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tooltipBehavior: TooltipBehavior(
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enable: true,
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format: 'point.x: point.y $unit',
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),
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// 折线图数据系列
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series: [
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LineSeries<ChartData, String>(
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dataSource: data,
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// X轴数据映射
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xValueMapper: (ChartData chart, _) => chart.name,
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// Y轴数据映射
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yValueMapper: (ChartData chart, _) => chart.value,
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// 线条颜色
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color: Theme.of(context).colorScheme.primary,
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// 线条宽度
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width: 3,
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// 数据点样式
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markerSettings: const MarkerSettings(
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isVisible: true,
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color: Colors.white,
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shape: DataMarkerType.circle,
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height: 6,
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width: 6,
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),
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// 折线名称（会显示在图例中）
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name: yAxisName,
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// 启用数据标签（直接显示数值）
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dataLabelSettings: const DataLabelSettings(
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isVisible: true,
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color: Colors.white,
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opacity: 0,
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),
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// 动画效果
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animationDuration: 2000, // 动画时长（毫秒）
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),
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],
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);
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}
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Widget barChart({
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required BuildContext context,
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required String xAxisName,
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required String yAxisName,
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required String unit,
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required List<ChartData> data,
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}) {
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return SfCartesianChart(
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// X轴配置（类别轴）
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primaryXAxis: CategoryAxis(
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majorGridLines: MajorGridLines(width: 0),
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title: AxisTitle(text: xAxisName),
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),
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// Y轴配置（数值轴）
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// primaryYAxis: NumericAxis(title: AxisTitle(text: '$yAxisName（$unit）')),
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// 启用交互提示
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tooltipBehavior: TooltipBehavior(
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enable: true,
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format: 'point.x: point.y $unit',
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),
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// 柱状图数据系列
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series: [
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ColumnSeries<ChartData, String>(
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dataSource: data,
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// X轴数据映射
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xValueMapper: (ChartData chart, _) => chart.name,
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// Y轴数据映射
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yValueMapper: (ChartData chart, _) => chart.value,
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// 名称
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name: yAxisName,
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// 柱子颜色
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color: Theme.of(context).colorScheme.primary,
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// 柱子宽度（0-1之间，1表示占满类别间隔）
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width: 0.6,
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// 柱子边框
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borderWidth: 1,
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borderColor: Colors.black12,
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// 数据标签
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dataLabelSettings: const DataLabelSettings(
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isVisible: true,
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color: Colors.white,
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opacity: 0,
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alignment: ChartAlignment.center,
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),
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// 动画效果
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animationDuration: 2000,
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),
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],
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);
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}
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Widget doubleBarChart({
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required BuildContext context,
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required String xAxisName,
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required String yAxisName,
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required String unit,
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required List<ChartData> data1,
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required List<ChartData> data2,
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required String series1Name,
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required String series2Name,
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}) {
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return SfCartesianChart(
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// X轴配置（类别轴）
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primaryXAxis: CategoryAxis(
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majorGridLines: const MajorGridLines(width: 0),
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title: AxisTitle(text: xAxisName),
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),
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// Y轴配置（数值轴）
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// primaryYAxis: NumericAxis(title: AxisTitle(text: '$yAxisName（$unit）')),
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// 图例配置
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legend: Legend(
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isVisible: true,
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position: LegendPosition.top,
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overflowMode: LegendItemOverflowMode.wrap,
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),
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// 启用交互提示
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tooltipBehavior: TooltipBehavior(
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enable: true,
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format: 'series.name: point.y $unit',
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),
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// 双柱状图数据系列
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series: <ColumnSeries<ChartData, String>>[
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ColumnSeries<ChartData, String>(
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dataSource: data1,
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// X轴数据映射
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xValueMapper: (ChartData chart, _) => chart.name,
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// Y轴数据映射
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yValueMapper: (ChartData chart, _) => chart.value,
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// 系列名称
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name: series1Name,
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// 柱子颜色
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color: Theme.of(context).colorScheme.primary,
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// 柱子宽度
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width: 0.3,
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// 柱子边框
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borderWidth: 1,
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borderColor: Colors.black12,
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// 数据标签
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dataLabelSettings: const DataLabelSettings(
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isVisible: true,
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color: Colors.white,
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opacity: 0,
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alignment: ChartAlignment.center,
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),
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// 动画效果
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animationDuration: 2000,
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),
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ColumnSeries<ChartData, String>(
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dataSource: data2,
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// X轴数据映射
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xValueMapper: (ChartData chart, _) => chart.name,
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// Y轴数据映射
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yValueMapper: (ChartData chart, _) => chart.value,
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// 系列名称
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name: series2Name,
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// 柱子颜色
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color: Theme.of(context).colorScheme.inversePrimary,
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// 柱子宽度
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width: 0.3,
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// 柱子边框
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borderWidth: 1,
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borderColor: Colors.black12,
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// 数据标签
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dataLabelSettings: const DataLabelSettings(
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isVisible: true,
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color: Colors.white,
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opacity: 0,
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alignment: ChartAlignment.center,
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),
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// 动画效果
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animationDuration: 2000,
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),
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],
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);
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}
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Widget pieChart({
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required BuildContext context,
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required String unit,
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required List<ChartData> data,
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}) {
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// 计算 value 的总和
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double sumValue = data.fold(0.0, (sum, item) => sum + item.value);
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return SfCircularChart(
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// 饼图标题
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// title: ChartTitle(text: '菜谱类别占比分布'),
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// 启用图例
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legend: const Legend(isVisible: true, position: LegendPosition.right),
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// 启用交互提示（点击扇区显示详情）
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tooltipBehavior: TooltipBehavior(
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enable: true,
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format: 'point.x: point.y $unit',
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),
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// 饼图系列配置
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series: [
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PieSeries<ChartData, String>(
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dataSource: data,
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// 类别映射（饼图扇区名称）
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xValueMapper: (ChartData data, _) => data.name,
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// 数值映射（扇区大小占比）
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yValueMapper: (ChartData data, _) => data.value,
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// 扇区半径（0-1之间，1表示充满容器）
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// radius: '50%',
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// 启用扇区分离效果
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explode: true,
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// 指定分离的扇区索引（这里分离第一个扇区）
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explodeIndex: 0,
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// 分离距离
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explodeOffset: '5%',
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dataLabelMapper: (ChartData data, _) {
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final percentage = (data.value / sumValue * 100).toStringAsFixed(0);
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return '$percentage%';
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},
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// 数据标签（显示在扇区上的文本）
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dataLabelSettings: DataLabelSettings(isVisible: true),
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// 动画效果
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animationDuration: 2000,
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),
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],
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);
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}
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