JavaFX 8 Tutorial 58 - Pie Chart and Mouse Event Handler

The Code written in this tutorial is :



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package tutorial.pkg56.pie.chart;



import javafx.application.Application;

import javafx.collections.FXCollections;

import javafx.collections.ObservableList;

import javafx.geometry.Insets;

import javafx.scene.Scene;

import javafx.scene.chart.PieChart;

import javafx.scene.control.Label;

import javafx.scene.input.MouseEvent;

import javafx.scene.layout.BorderPane;

import javafx.scene.text.Font;

import javafx.scene.text.FontWeight;

import javafx.stage.Stage;



/**

 *

 * @author Ram

 */

public class Tutorial56PieChart extends Application {

    private final ObservableList<PieChart.Data> details = FXCollections.observableArrayList();

    private BorderPane root;

    private PieChart pieChart;

    private Label label;

   

    @Override

    public void start(Stage primaryStage) {

       

        primaryStage.setTitle("JavaFX 8 Tutorial 58 - Pie Chart and Mouse Event Handler");

        details.addAll(new PieChart.Data("Printing Cost", 20),

                new PieChart.Data("Paper Cost", 25),

                new PieChart.Data("Binding Cost", 30),

                new PieChart.Data("Promotion Cost", 10),

                new PieChart.Data("Transportation Cost", 10),

                new PieChart.Data("Royalty Cost", 15)

            );

       

        root = new BorderPane();

        Scene scene = new Scene(root, 600, 500);

        scene.getStylesheets().add(getClass().getResource("Style.css").toExternalForm());

       

        pieChart = new PieChart();

        pieChart.setData(details);

        pieChart.setTitle("Various Expenditures (in %) Incurred In Publishing A Book");

        //pieChart.setLegendSide(Side.BOTTOM);

        //pieChart.setLabelsVisible(true);

        //pieChart.setClockwise(false);

        //pieChart.setStartAngle(90);

        root.setCenter(pieChart);

       

        label = new Label();

        label.setFont(Font.font("SanSerif", FontWeight.BOLD, 15));

       

        pieChart.getData()

                .stream()

                .forEach(data ->{

                    data.getNode().addEventHandler(MouseEvent.ANY, e->{

                        label.setText(data.getName() + " Expenditures: " + (int)data.getPieValue() +

                                "%\n" + "Central Angle: " + (int)((data.getPieValue()/100)*360) +

                                "degree");

                    });

                });

        root.setBottom(label);

        BorderPane.setMargin(label, new Insets(0, 0, 10, 120));

       

        primaryStage.setScene(scene);

        primaryStage.show();

    }



    /**

     * @param args the command line arguments

     */

    public static void main(String[] args) {

        launch(args);

    }

   

}