[英]How to display a JFreeChart in a JavaFX tab?
我正在嘗試在我的 JavaFX 應用程序中顯示 JFreeChart PieChart。 如果有幫助,我正在使用 SceneBuilder。 下面是我創建圖表的代碼,我想添加到我的初始化方法中:
private static PieDataset createDataset() {
DefaultPieDataset dataset = new DefaultPieDataset();
AnnonceService sa = AnnonceService.getInstance();
Annonce a = sa.last();
dataset.setValue("Les offres",a.getNbr_o());
dataset.setValue("Les demandes", a.getNbr_d());
return dataset;
}
private static JFreeChart createChart(PieDataset dataset) {
JFreeChart chart = ChartFactory.createPieChart(
"Les offres par rapport aux demandes", dataset);
return chart;
}
從這個完整的示例開始,我構建了一個包含三個新選項卡的TabPane
。 每個Tab
包含一個新的ChartViewer
,每個ChartViewer
包含一個具有不同名稱的餅圖。 最后,我通過使用TabPane
作為根節點創建Scene
來設置Stage
。
TabPane tabPane = new TabPane(
new Tab("Tab 1", new ChartViewer(createChart("One"))),
new Tab("Tab 2", new ChartViewer(createChart("Two"))),
new Tab("Tab 3", new ChartViewer(createChart("Three")))
);
stage.setScene(new Scene(tabPane));
經測試:
import java.awt.Color;
import java.awt.Font;
import java.text.DecimalFormat;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Tab;
import javafx.scene.control.TabPane;
import javafx.stage.Stage;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.fx.ChartViewer;
import org.jfree.chart.labels.PieSectionLabelGenerator;
import org.jfree.chart.labels.StandardPieSectionLabelGenerator;
import org.jfree.chart.plot.PiePlot;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;
/**
* @see https://stackoverflow.com/a/55737893/230513
* @see https://stackoverflow.com/q/44289920/230513
*/
public class PieChartFX extends Application {
private static PieDataset createDataset() {
DefaultPieDataset dataset = new DefaultPieDataset();
dataset.setValue("A", 0.8);
dataset.setValue("B", 9.4);
dataset.setValue("C", 0.1);
dataset.setValue("D", 89.5);
dataset.setValue("E", 0.2);
dataset.setValue("F", 0.0);
return dataset;
}
private static JFreeChart createChart(String name) {
PieDataset dataset = createDataset();
JFreeChart chart = ChartFactory.createPieChart(
name, dataset, false, true, false);
PiePlot plot = (PiePlot) chart.getPlot();
plot.setOutlineVisible(false);
plot.setSectionPaint("A", Color.RED);
plot.setSectionPaint("B", Color.BLUE);
plot.setSectionPaint("C", Color.GREEN);
plot.setSectionPaint("D", Color.YELLOW);
plot.setSectionPaint("E", Color.CYAN);
plot.setLabelFont(new Font(Font.SANS_SERIF, Font.BOLD, 16));
// Custom labels https://stackoverflow.com/a/17507061/230513
PieSectionLabelGenerator gen = new StandardPieSectionLabelGenerator(
"{0}: {2}", new DecimalFormat("0"), new DecimalFormat("0.0%"));
plot.setLabelGenerator(gen);
return chart;
}
@Override
public void start(Stage stage) {
TabPane tabPane = new TabPane(
new Tab("Tab 1", new ChartViewer(createChart("One"))),
new Tab("Tab 2", new ChartViewer(createChart("Two"))),
new Tab("Tab 3", new ChartViewer(createChart("Three")))
);
stage.setScene(new Scene(tabPane));
stage.setTitle("JFreeChart: PieChartFX");
stage.setWidth(600);
stage.setHeight(400);
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}
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