GWT Google Charts 定制颜色K线图

以下是定制颜色K线图的示例。

我们已经在《GWT Google Charts 入门程序》章节中看到了用于绘制图表的基本步骤。现在，让我们看一个定制颜色K线图的例子。

GWT Google Charts 定制颜色K线图 配置

我们使用CandlestickChartOptions类来显示定制颜色K线图。

// Set options
CandlestickChartOptions options = CandlestickChartOptions.create();
options.setLegend(Legend.create(LegendPosition.NONE));
options.setFallingColor(BackgroundColor.create(null, "red", 2));
options.setRisingColor(BackgroundColor.create(null, "orange", 2));

GWT Google Charts 定制颜色K线图 示例

package com.yiidian.helloWorld.client;

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.ui.*;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.DOM;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.ClickEvent;
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.*;
import com.googlecode.gwt.charts.client.options.*;

public class HelloWorld implements EntryPoint {
    private CandlestickChart chart;

    private void initialize() {
        ChartLoader chartLoader = new ChartLoader(ChartPackage.CORECHART);
        chartLoader.loadApi(new Runnable() {
            public void run() {
                // Create and attach the chart
                chart = new CandlestickChart();
                RootPanel.get().add(chart);
                draw();
            }
        });
    }
    private void draw() {
        DataTable dataTable = DataTable.create();
        dataTable.addColumn(ColumnType.STRING, "Date");
        dataTable.addColumn(ColumnType.NUMBER, "A");
        dataTable.addColumn(ColumnType.NUMBER, "B");
        dataTable.addColumn(ColumnType.NUMBER, "C");
        dataTable.addColumn(ColumnType.NUMBER, "D");

        dataTable.addRow("Mon", 20, 28, 38, 45);
        dataTable.addRow("Tue", 31, 38, 55, 66);
        dataTable.addRow("Wed", 50, 55, 77, 80);
        dataTable.addRow("Thu", 77, 77, 66, 50);
        dataTable.addRow("Fri", 68, 66, 22, 15);

        // Set options
        CandlestickChartOptions options = CandlestickChartOptions.create();
        options.setLegend(Legend.create(LegendPosition.NONE));
        options.setFallingColor(BackgroundColor.create(null, "red", 2));
        options.setRisingColor(BackgroundColor.create(null, "orange", 2));

        // Draw the chart
        chart.draw(dataTable,options);
        chart.setWidth("600px");
        chart.setHeight("400px");
    }
    public void onModuleLoad() {
        initialize();
    }
}

输出结果为：