GWT Google Charts - Negative Bar Chart


Advertisements

Following is an example of a Negative Bar Chart.

We have already seen the configurations used to draw a chart in Google Charts Configuration Syntax chapter. Now, let us see an example of a Negative Bar Chart.

Example

HelloWorld.java

package com.tutorialspoint.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.BarChart;
import com.googlecode.gwt.charts.client.corechart.BarChartOptions;
import com.googlecode.gwt.charts.client.options.HAxis;
import com.googlecode.gwt.charts.client.options.VAxis;

public class HelloWorld implements EntryPoint {
   private BarChart chart;

   private void initialize() {
      ChartLoader chartLoader = new ChartLoader(ChartPackage.CORECHART);
      chartLoader.loadApi(new Runnable() {
         public void run() {
            // Create and attach the chart
            chart = new BarChart();
            RootPanel.get().add(chart);
            draw();
         }
      });
   }
   private void draw() {
      // Prepare the data
      DataTable data = DataTable.create();
      data.addColumn(ColumnType.STRING, "Year");
      data.addColumn(ColumnType.NUMBER, "Asia");
      data.addColumn(ColumnType.NUMBER, "Europe");
      
      data.addRow("2012", 900, 390);
      data.addRow("2013", -1000,400);
      data.addRow("2014", -1170, 440);
      data.addRow("2015", 1250, 480);
      data.addRow("2016", 1530, 540);    		

      // Set options
      BarChartOptions options = BarChartOptions.create();
      options.setTitle("Population (in millions)");
      options.setHAxis(HAxis.create("Year"));
      VAxis vAxis = VAxis.create();
      vAxis.setMinValue(0);
      
      options.setVAxis(vAxis);

      // Draw the chart
      chart.draw(data,options);
      chart.setWidth("400px");
      chart.setHeight("400px");
   }
   public void onModuleLoad() {
      initialize();
   }
}

Result

Verify the result.

Negative Bar Chart
gwt_googlecharts_bar_charts.htm
Advertisements