Reflect an image in JavaFX using a 180 degree rotation about the Y Axis

ReflectionByRotation.java

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.VBoxBuilder;
import javafx.scene.transform.Rotate;
import javafx.stage.Stage;

/** reflects an image using a 180 degree rotation about the Y axis */
public class ReflectionByRotation extends Application {
  public static void main(String[] args) throws Exception { launch(args); }
  public void start(final Stage stage) throws Exception {
    stage.setTitle("Reflection by Rotation");

    // create a refectable image.
    final ImageView imageView = new ImageView(new Image("http://bluebuddies.com/smurf_fun/smurf_personality_test/jpg/Painter_Smurf.jpg"));
    imageView.setTranslateZ(imageView.getBoundsInLocal().getWidth() / 2.0);
    imageView.setRotationAxis(Rotate.Y_AXIS);

    // reflect and restore the image when a button is clicked by applying and unapplying the transformation matrix.
    final Button reflect = new Button("Reflect");
    reflect.setOnAction(new EventHandler<ActionEvent>() {
      @Override public void handle(ActionEvent actionEvent) {
        if ("Reflect".equals(reflect.getText())) {
          imageView.setRotate(180);
          reflect.setText("Restore");
        } else {
          imageView.setRotate(0);
          reflect.setText("Reflect");
        }
      }
    });

    // layout the scene.
    stage.setScene(new Scene(
      VBoxBuilder.create()
        .spacing(10).alignment(Pos.CENTER)
        .children(imageView, reflect)
        .style("-fx-background-color: linear-gradient(to bottom, cornsilk, midnightblue); -fx-padding:10; -fx-font-size: 22;")
        .build()
    ));
    stage.show();
  }
}

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