气泡图与数据标签（Bubble chart with data labels）

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小牛编辑

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2023-12-01

以下是带有标签的气泡图的示例。

我们已经在Google Charts Configuration Syntax一章中看到了用于绘制图表的配置。现在，让我们看一个带有数据标签的气泡图的示例。

配置 (Configurations)

我们使用BubbleChart类来显示带有数据标签的气泡图。

// bubble chart
BubbleChart chart = new BubbleChart();

例子 (Example)

HelloWorld.java

package cn.xnip.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.BubbleChart;
import com.googlecode.gwt.charts.client.corechart.BubbleChartOptions;
public class HelloWorld implements EntryPoint {
   private BubbleChart chart;
   private void initialize() {
      ChartLoader chartLoader = new ChartLoader(ChartPackage.CORECHART);
      chartLoader.loadApi(new Runnable() {
         public void run() {
            // Create and attach the chart
            chart = new BubbleChart();
            RootPanel.get().add(chart);
            draw();
         }
      });
   }
   private void draw() {
      DataTable data = DataTable.create();
      data.addColumn(ColumnType.STRING, "Id");
      data.addColumn(ColumnType.NUMBER, "Age");
      data.addColumn(ColumnType.NUMBER, "Weight");
      data.addRow("Robert", 8, 12);
      data.addRow("Mohan", 4, 8.5);
      data.addRow("Ramesh", 11, 14);
      data.addRow("Julie", 4, 5);
      data.addRow("Sohan", 3, 3.5);
      data.addRow("Karim", 6.5, 7);
      BubbleChartOptions options = BubbleChartOptions.create();
      options.setTitle("Age vs Weight");
      // Draw the chart
      chart.draw(data,options);
      chart.setWidth("400px");
      chart.setHeight("400px");
   }
   public void onModuleLoad() {
      initialize();
   }
}

结果 (Result)

验证结果。