GWT Highcharts 基本条形图

GWT Highcharts 基本条形图 介绍

我们已经在《GWT Highcharts 入门案例》一章中看到了用于绘制此图表的步骤。现在让我们考虑以下示例以进一步了解基本条形图。

图表

将图表类型配置为基于“bar”。chart.type决定图表的系列类型。此处，默认值为“line”。

chart.setType(Type.BAR);

GWT Highcharts 基本条形图 示例

package com.yiidian.helloWorld.client;


import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.ui.RootPanel;
import org.moxieapps.gwt.highcharts.client.*;
import org.moxieapps.gwt.highcharts.client.labels.*;
import org.moxieapps.gwt.highcharts.client.plotOptions.BarPlotOptions;

public class HelloWorld implements EntryPoint {
    public void onModuleLoad() {
        Chart chart = new Chart()
                .setType(Series.Type.BAR)
                .setChartTitleText("Historic World Population by Region")
                .setChartSubtitleText("Source: Wikipedia.org")
                .setBarPlotOptions(new BarPlotOptions()
                        .setDataLabels(new DataLabels()
                                .setEnabled(true)
                        )
                )
                .setLegend(new Legend()
                        .setLayout(Legend.Layout.VERTICAL)
                        .setAlign(Legend.Align.RIGHT)
                        .setVerticalAlign(Legend.VerticalAlign.TOP)
                        .setX(-100)
                        .setY(100)
                        .setFloating(true)
                        .setBorderWidth(1)
                        .setBackgroundColor("#FFFFFF")
                        .setShadow(true)
                )
                .setCredits(new Credits()
                        .setEnabled(false)
                )
                .setToolTip(new ToolTip()
                        .setFormatter(new ToolTipFormatter() {
                            @Override
                            public String format(ToolTipData toolTipData) {
                                return toolTipData.getSeriesName() + ": " + toolTipData.getYAsLong() +" million";
                            }
                        }));
        chart.getXAxis()
                .setCategories("Africa", "America", "Asia", "Europe", "Oceania");
        chart.getYAxis()
                .setAxisTitle(new AxisTitle()
                        .setText("Population (millions)")
                        .setAlign(AxisTitle.Align.HIGH)
                );
        chart.addSeries(chart.createSeries()
                .setName("Year 1800")
                .setPoints(new Number[] { 107, 31, 635, 203, 2 })
        );
        chart.addSeries(chart.createSeries()
                .setName("Year 1900")
                .setPoints(new Number[] { 133, 156, 947, 408, 6 })
        );
        chart.addSeries(chart.createSeries()
                .setName("Year 2008")
                .setPoints(new Number[] { 973, 914, 4054, 732, 34 })
        );
        RootPanel.get().add(chart);
    }
}

输出结果为：