Question

我想更改ListSeries的数量，以便在点击按钮时绘制图表。

我正在使用Vaadin 8.0.1和Vaadin图表4.0.0和Java 8.

Class包含图表的实现。

package v8.v8;


import java.util.List;

import com.vaadin.addon.charts.Chart;
import com.vaadin.addon.charts.model.ChartType;
import com.vaadin.addon.charts.model.Configuration;
import com.vaadin.addon.charts.model.HorizontalAlign;
import com.vaadin.addon.charts.model.LayoutDirection;
import com.vaadin.addon.charts.model.Legend;
import com.vaadin.addon.charts.model.ListSeries;
import com.vaadin.addon.charts.model.PlotOptionsColumn;
import com.vaadin.addon.charts.model.Series;
import com.vaadin.addon.charts.model.Tooltip;
import com.vaadin.addon.charts.model.VerticalAlign;
import com.vaadin.addon.charts.model.XAxis;
import com.vaadin.addon.charts.model.YAxis;
import com.vaadin.addon.charts.model.style.SolidColor;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Button.ClickListener;
import com.vaadin.ui.Component;
import com.vaadin.ui.VerticalLayout;

@SuppressWarnings("serial")
public class GetChartUI {


    protected Component getChart() {
        VerticalLayout vLayout = new VerticalLayout();
        Chart chart = new Chart(ChartType.COLUMN);


        Configuration conf = chart.getConfiguration();

        conf.setTitle("Total fruit consumption, grouped by gender");
        conf.setSubTitle("Source: WorldClimate.com");

        XAxis x = new XAxis();
        x.setCategories("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
        conf.addxAxis(x);

        YAxis y = new YAxis();
        y.setMin(0);
        y.setTitle("Rainfall (mm)");
        conf.addyAxis(y);

        Legend legend = new Legend();
        legend.setLayout(LayoutDirection.VERTICAL);
        legend.setBackgroundColor(new SolidColor("#FFFFFF"));
        legend.setAlign(HorizontalAlign.LEFT);
        legend.setVerticalAlign(VerticalAlign.TOP);
        legend.setX(100);
        legend.setY(70);
        legend.setFloating(true);
        legend.setShadow(true);
        conf.setLegend(legend);

        Tooltip tooltip = new Tooltip();
        tooltip.setFormatter("this.x +': '+ this.y +' mm'");
        conf.setTooltip(tooltip);

        PlotOptionsColumn plot = new PlotOptionsColumn();
        plot.setPointPadding(0.2);
        plot.setBorderWidth(0);

        conf.addSeries(new ListSeries("Tokyo", 49.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6,
                54.4));
        conf.addSeries(
                new ListSeries("New York", 83.6, 78.8, 98.5, 93.4, 106.0, 84.5, 105.0, 104.3, 91.2, 83.5, 106.6, 92.3));
        conf.addSeries(
                new ListSeries("London", 48.9, 38.8, 39.3, 41.4, 47.0, 48.3, 59.0, 59.6, 52.4, 65.2, 59.3, 51.2));
        conf.addSeries(
                new ListSeries("Berlin", 42.4, 33.2, 34.5, 39.7, 52.6, 75.5, 57.4, 60.4, 47.6, 39.1, 46.8, 51.1));


        chart.drawChart(conf);
        Button button = new Button("Remove series",new ClickListener() {

            @Override
            public void buttonClick(ClickEvent event) {
                // TODO Auto-generated method stub
                Configuration configuration =  chart.getConfiguration();
                List<Series> sc = configuration.getSeries();

                for(Series scq :sc){
                    //Here i want to remove ListSeries contain name called London 
                    if (scq.getName().equals("London"))
                        configuration.getSeries().remove(scq);
                }
                chart.drawChart();
            }
        });
        vLayout.addComponents(chart,button);

        return vLayout;
    }
}

上面的代码不会抛出编译错误，因为 configuration.getSeries（）返回不可修改的List。但它从列表中删除系列时抛出异常（预计由于不可修改的List）。

任何帮助都将不胜感激。我整天都在谷歌但没有运气。

Answer 1

但是，从图表中删除系列很简单。只需从图表配置中获取现有系列，并确定您应该删除哪一个。获取新列表或数组的扩展名并将其重新设置为图表配置。

Button button = new Button("Remove series", new ClickListener() {

    @Override
    public void buttonClick(ClickEvent event) {
        // TODO Auto-generated method stub
        Configuration configuration = chart.getConfiguration();

        List<Series> sc = configuration.getSeries();

        Series[] aList = new Series[sc.size()];
        int i = 0;
        for (Series scq : sc) {
            if (!scq.getName().equals("London"))
                aList[i++] = scq;
        }

        chart.getConfiguration().setSeries(aList);
        chart.drawChart();

    }
});

从vaadin chart 4.0.0移除系列

1 个答案: