Basic Map

以下是基本地图的示例。

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，让我们看一个地图的例子。

配置 (Configurations)

我们使用Map类来显示基本的地图。

// map chart
Map chart = new Map();

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.map.Map;
import com.googlecode.gwt.charts.client.map.MapOptions;
public class HelloWorld implements EntryPoint {
   private Map chart;
   private void initialize() {
      ChartLoader chartLoader = new ChartLoader(ChartPackage.MAP);
      chartLoader.loadApi(new Runnable() {
         public void run() {
            // Create and attach the chart
            chart = new Map();
            RootPanel.get().add(chart);
            draw();
         }
      });
   }
   private void draw() {
      // Prepare the data
      DataTable data = DataTable.create();
      data.addColumn(ColumnType.STRING, "Country");
      data.addColumn(ColumnType.STRING, "Population");
      data.addRow("China", "China: 1,363,800,000");
      data.addRow("India", "India: 1,242,620,000");
      data.addRow("US", "US: 317,842,000");
      data.addRow("Indonesia", "Indonesia: 247,424,598");
      data.addRow("Brazil", "Brazil: 201,032,714");
      data.addRow("Pakistan", "Pakistan: 186,134,000");
      data.addRow("Nigeria", "Nigeria: 173,615,000");
      data.addRow("Bangladesh", "Bangladesh: 152,518,015");
      data.addRow("Russia", "Russia: 146,019,512");
      data.addRow("Japan", "Japan: 127,120,000");
      // Set options
      MapOptions options = MapOptions.create();
      options.setShowTip(true);
      // Draw the chart
      chart.draw(data,options);
      chart.setWidth("400px");
      chart.setHeight("400px");
   }
   public void onModuleLoad() {
      initialize();
   }
}

结果 (Result)

验证结果。