组合图有助于将每个系列渲染为以下列表中的不同标记类型:线条,区域,条形,烛台和阶梯区域.要为系列指定默认标记类型,请使用seriesType属性. Series属性用于单独指定每个系列的属性.以下是显示差异的柱形图示例.
我们已经看到用于在 Google图表配置语法一章.现在,让我们看一个显示差异的柱形图示例.
我们使用了 ComboChart 类显示组合图.
// Combination chart ComboChart chart = new ComboChart();
HelloWorld.java
package com.it1352.client; import com.google.gwt.core.client.EntryPoint; import com.google.gwt.user.client.ui.RootPanel; import com.googlecode.gwt.charts.client.ChartLoader; import com.googlecode.gwt.charts.client.ChartPackage; import com.googlecode.gwt.charts.client.ColumnType; import com.googlecode.gwt.charts.client.DataTable; import com.googlecode.gwt.charts.client.corechart.ComboChart; import com.googlecode.gwt.charts.client.corechart.ComboChartOptions; import com.googlecode.gwt.charts.client.corechart.ComboChartSeries; import com.googlecode.gwt.charts.client.options.HAxis; import com.googlecode.gwt.charts.client.options.SeriesType; import com.googlecode.gwt.charts.client.options.VAxis; public class HelloWorld implements EntryPoint { private ComboChart chart; private void initialize() { ChartLoader chartLoader = new ChartLoader(ChartPackage.CORECHART); chartLoader.loadApi(new Runnable() { public void run() { // Create and attach the chart chart = new ComboChart(); RootPanel.get().add(chart); draw(); } }); } private void draw() { // Prepare the data DataTable data = DataTable.create(); data.addColumn(ColumnType.STRING, "Fruits"); data.addColumn(ColumnType.NUMBER, "Jane"); data.addColumn(ColumnType.NUMBER, "Jone"); data.addColumn(ColumnType.NUMBER, "Average"); data.addRow("Apples", 3, 2, 2.5); data.addRow("Oranges",2, 3, 2.5); data.addRow("Pears", 1, 5, 3); data.addRow("Bananas", 3, 9, 6); data.addRow("Plums", 4, 2, 3); // Set options ComboChartOptions options = ComboChartOptions.create(); options.setTitle("Fruits distribution"); options.setHAxis(HAxis.create("Person")); options.setVAxis(VAxis.create("Fruits")); options.setSeriesType(SeriesType.BARS); ComboChartSeries lineSeries = ComboChartSeries.create(); lineSeries.setType(SeriesType.LINE); options.setSeries(2,lineSeries); // Draw the chart chart.draw(data,options); chart.setWidth("400px"); chart.setHeight("400px"); } public void onModuleLoad() { initialize(); }}
验证结果.