📅  最后修改于: 2020-11-16 06:30:58             🧑  作者: Mango
在本章中,我们将展示使用GWT中的Highcharts API绘制图表所需的配置。
请按照以下步骤更新我们在GWT-创建应用程序一章中创建的GWT应用程序–
Step | Description |
---|---|
1 | Create a project with a name HelloWorld under a package com.tutorialspoint as explained in the GWT – Create Application chapter. |
2 | Modify HelloWorld.gwt.xml, HelloWorld.html and HelloWorld.java as explained below. Keep rest of the files unchanged. |
3 | Compile and run the application to verify the result of the implemented logic. |
以下是修改后的模块描述符src / com.tutorialspoint / HelloWorld.gwt.xml的内容。
以下是修改后的HTML主机文件war / HelloWorld.html的内容。
GWT Highcharts Showcase
了解配置后,我们将在最后看到更新的HelloWorld.java。
配置图表的类型,标题和副标题。
Chart chart = new Chart()
.setType(Type.SPLINE)
.setChartTitleText("Monthly Average Temperature")
.setChartSubtitleText("Source: WorldClimate.com");
配置股票代号以显示在X轴上。
XAxis xAxis = chart.getXAxis();
xAxis.setCategories("Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
配置标题,在Y轴上显示的绘图线。
YAxis yAxis = chart.getYAxis();
yAxis.setAxisTitleText("Temperature °C");
yAxis.createPlotLine()
.setValue(0)
.setWidth(1)
.setColor("#808080");
配置工具提示。将后缀添加到值(y轴)之后。
ToolTip toolTip = new ToolTip();
toolTip.setValueSuffix("°C");
chart.setToolTip(toolTip);
配置图例,使其与其他属性一起显示在图表的右侧。
legend.setLayout(Legend.Layout.VERTICAL)
.setAlign(Legend.Align.RIGHT)
.setVerticalAlign(Legend.VerticalAlign.TOP)
.setX(-10)
.setY(100)
.setBorderWidth(0);
chart.setLegend(legend);
配置要在图表上显示的数据。系列是一个数组,其中该数组的每个元素代表图表上的一条线。
chart.addSeries(chart.createSeries()
.setName("Tokyo")
.setPoints(new Number[] {
7.0, 6.9, 9.5, 14.5, 18.2, 21.5, 25.2,
26.5, 23.3, 18.3, 13.9, 9.6
})
);
chart.addSeries(chart.createSeries()
.setName("New York")
.setPoints(new Number[] {
-0.2, 0.8, 5.7, 11.3, 17.0, 22.0, 24.8,
24.1, 20.1, 14.1, 8.6, 2.5
})
);
chart.addSeries(chart.createSeries()
.setName("Berlin")
.setPoints(new Number[] {
-0.9, 0.6, 3.5, 8.4, 13.5, 17.0, 18.6,
17.9, 14.3, 9.0, 3.9, 1.0
})
);
chart.addSeries(chart.createSeries()
.setName("London")
.setPoints(new Number[] {
3.9, 4.2, 5.7, 8.5, 11.9, 15.2, 17.0,
16.6, 14.2, 10.3, 6.6, 4.8
})
);
我们将图表添加到根面板。
RootPanel.get().add(chart);
考虑以下示例,以进一步了解配置语法-
HelloWorld.java
package com.tutorialspoint.client;
import org.moxieapps.gwt.highcharts.client.Chart;
import org.moxieapps.gwt.highcharts.client.Legend;
import org.moxieapps.gwt.highcharts.client.Series.Type;
import org.moxieapps.gwt.highcharts.client.ToolTip;
import org.moxieapps.gwt.highcharts.client.XAxis;
import org.moxieapps.gwt.highcharts.client.YAxis;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.ui.RootPanel;
public class HelloWorld implements EntryPoint {
public void onModuleLoad() {
Chart chart = new Chart()
.setType(Type.SPLINE)
.setChartTitleText("Monthly Average Temperature")
.setChartSubtitleText("Source: WorldClimate.com");
XAxis xAxis = chart.getXAxis();
xAxis.setCategories("Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
YAxis yAxis = chart.getYAxis();
yAxis.setAxisTitleText("Temperature °C");
yAxis.createPlotLine()
.setValue(0)
.setWidth(1)
.setColor("#808080");
ToolTip toolTip = new ToolTip();
toolTip.setValueSuffix("°C");
chart.setToolTip(toolTip);
Legend legend = new Legend();
legend.setLayout(Legend.Layout.VERTICAL)
.setAlign(Legend.Align.RIGHT)
.setVerticalAlign(Legend.VerticalAlign.TOP)
.setX(-10)
.setY(100)
.setBorderWidth(0);
chart.setLegend(legend);
chart.addSeries(chart.createSeries()
.setName("Tokyo")
.setPoints(new Number[] {
7.0, 6.9, 9.5, 14.5, 18.2, 21.5, 25.2,
26.5, 23.3, 18.3, 13.9, 9.6
})
);
chart.addSeries(chart.createSeries()
.setName("New York")
.setPoints(new Number[] {
-0.2, 0.8, 5.7, 11.3, 17.0, 22.0, 24.8,
24.1, 20.1, 14.1, 8.6, 2.5
})
);
chart.addSeries(chart.createSeries()
.setName("Berlin")
.setPoints(new Number[] {
-0.9, 0.6, 3.5, 8.4, 13.5, 17.0, 18.6,
17.9, 14.3, 9.0, 3.9, 1.0
})
);
chart.addSeries(chart.createSeries()
.setName("London")
.setPoints(new Number[] {
3.9, 4.2, 5.7, 8.5, 11.9, 15.2, 17.0,
16.6, 14.2, 10.3, 6.6, 4.8
})
);
RootPanel.get().add(chart);
}
}
验证结果。