/*
 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
 */

package test;

import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.PerspectiveCamera;
import javafx.scene.Scene;
import javafx.scene.input.MouseEvent;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

public class DirtyRegionsMovingCamera extends Application {

    double ax, ay;

    @Override public void start(Stage stage) {
        stage.setTitle("Hello Rectangle");

        Group root = new Group();
        Scene scene = new Scene(root, 600, 450);
        scene.setFill(Color.LIGHTGREEN);

        final PerspectiveCamera cam = new PerspectiveCamera();
        root.getChildren().add(cam);
        scene.setCamera(cam);

        scene.setOnMousePressed(new EventHandler<MouseEvent>() {
            @Override public void handle(MouseEvent event) {
                ax = event.getSceneX();
                ay = event.getSceneY();
            }
        });

        scene.setOnMouseDragged(new EventHandler<MouseEvent>() {
            @Override public void handle(MouseEvent event) {
                cam.setTranslateX(cam.getTranslateX() + ax - event.getSceneX());
                cam.setTranslateY(cam.getTranslateY() + ay - event.getSceneY());
                ax = event.getSceneX();
                ay = event.getSceneY();
            }
        });

        Rectangle rect = new Rectangle(25, 40, 100, 50);
        rect.setFill(Color.RED);

        root.getChildren().add(rect);
        stage.setScene(scene);
        stage.show();
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Application.launch(args);
    }
}