8 SWTとのJavaFX相互運用性

例8-1 プレーンSWTおよびJavaFXボタンのJavaコード

import javafx.embed.swt.FXCanvas;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.paint.Color;
 
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
 
public class TwoButtons {
 
    public static void main(String[] args) {
        final Display display = new Display();
        final Shell shell = new Shell(display);
        final RowLayout layout = new RowLayout();
        shell.setLayout(layout);
 
        /* Create the SWT button */
        final org.eclipse.swt.widgets.Button swtButton =
                new org.eclipse.swt.widgets.Button(shell, SWT.PUSH);
        swtButton.setText("SWT Button");
 
        /* Create an FXCanvas */
        final FXCanvas fxCanvas = new FXCanvas(shell, SWT.NONE) {
            
                @Override
                public Point computeSize(int wHint, int hHint, boolean changed) {
                getScene().getWindow().sizeToScene();
                int width = (int) getScene().getWidth();
                int height = (int) getScene().getHeight();
                return new Point(width, height);
            }
        };
        /* Create a JavaFX Group node */
        Group group = new Group();
        /* Create a JavaFX button */
        final Button jfxButton = new Button("JFX Button");
        /* Assign the CSS ID ipad-dark-grey */
        jfxButton.setId("ipad-dark-grey");
        /* Add the button as a child of the Group node */
        group.getChildren().add(jfxButton);
        /* Create the Scene instance and set the group node as root */
        Scene scene = new Scene(group, Color.rgb(
                shell.getBackground().getRed(),
                shell.getBackground().getGreen(),
                shell.getBackground().getBlue()));
        /* Attach an external stylesheet */
        scene.getStylesheets().add("twobuttons/Buttons.css");
        fxCanvas.setScene(scene);
 
        /* Add Listeners */
        swtButton.addListener(SWT.Selection, new Listener() {
 
            @Override
            public void handleEvent(Event event) {
                jfxButton.setText("JFX Button: Hello from SWT");
                shell.layout();
            }
        });
        jfxButton.setOnAction(new EventHandler<ActionEvent>() {
 
            @Override
            public void handle(ActionEvent event) {
                swtButton.setText("SWT Button: Hello from JFX");
                shell.layout();
            }
        });
 
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }
        display.dispose();
    }
}