80. Accordion

An Accordion allows a group of TitledPanes (each TitledPane has a Title and a Node (a Polygon here) .

Here we make 10 TitledPanes, using the makeTitledPane method, for polygons from 3 to 12 sides.

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package ex80;

import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Accordion;
import javafx.scene.control.Label;
import javafx.scene.control.TitledPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Polygon;
import javafx.scene.text.Font;
import javafx.stage.Stage;

public class Ex80 extends Application {

    final int RADIUS = 100;
    
    @Override
    public void start(Stage stage) {
        
        Label label = new Label("Polygon Shapes");
        label.setFont(Font.font("Georgia", 20));

        VBox vbox = new VBox(label);
        vbox.setAlignment(Pos.CENTER);
        
        int N = 12;
        TitledPane[] titledPaneArray = new TitledPane[N-2];
        for (int i = 3; i<=N; i++) {
            titledPaneArray[i-3] = makeTitledPane(i);
        }
        
        Accordion accordion = new Accordion();
        accordion.getPanes().addAll(titledPaneArray);
        
        HBox hbox = new HBox(40, vbox, accordion);
        hbox.setAlignment(Pos.CENTER);
        hbox.setStyle("-fx-background-color: lime");

        Scene scene = new Scene(hbox, 600, 500);
        stage.setTitle("Example 80. Accordion");
        
        stage.setScene(scene);
        stage.show();
    }
    
    private TitledPane makeTitledPane(int num) {
        Polygon poly = new Polygon(getDouble(num));
        poly.setFill(Color.RED);
        return new TitledPane(num + "-sided Polygon", poly);
    }
    
    private double[] getDouble (int n) {
        double[] array = new double[2*n];
        for (int i = 0; i&t;n; i++){
            array[2*i] = RADIUS*Math.cos(2*Math.PI/n*i);
            array[2*i+1]=RADIUS*Math.sin(2*Math.PI/n*i);
        }
        return array;
    }

    public static void main(String[] args) {
        launch();
    }
}

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This is the output with 12-sided polygon selected:

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