JavaFX: Beispiel Animation

Dateiinhalt

package anim;

import javafx.animation.KeyFrame;
import javafx.animation.KeyValue;
import javafx.animation.PathTransition;
import javafx.animation.PathTransition.OrientationType;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.geometry.Point2D;
import javafx.scene.Scene;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.CubicCurveTo;
import javafx.scene.shape.MoveTo;
import javafx.scene.shape.Path;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
import javafx.util.Duration;

public class Anim extends Application {

  Point2D lastMousePos;

  public void start(Stage primaryStage) {

    Rectangle rectangle = new Rectangle(10, 10, 30, 30);
    Circle circle = new Circle(100, 100, 30);
    circle.setScaleX(1.5);
    circle.setFill(Color.CORAL);
    Pane pane = new Pane(circle, rectangle);

    primaryStage.setScene(new Scene(pane, 500, 500));
    primaryStage.show();

    // Timeline
    KeyFrame f1 = new KeyFrame(Duration.seconds(1),
            new KeyValue(rectangle.translateXProperty(), 100),
            new KeyValue(rectangle.translateYProperty(), 0));
    KeyFrame f2 = new KeyFrame(Duration.seconds(2),
            new KeyValue(rectangle.translateXProperty(), 100),
            new KeyValue(rectangle.translateYProperty(), 100));
    Timeline tl = new Timeline();
    tl.getKeyFrames().addAll(f1, f2);
    tl.setCycleCount(2); // 2 wiederholen (1 normal + 1 reversed)
    tl.setAutoReverse(true);
    tl.play();

    pane.addEventHandler(MouseEvent.MOUSE_PRESSED, e -> {
      lastMousePos = new Point2D(e.getSceneX(), e.getSceneY());
      tl.play();
    });

    pane.addEventHandler(MouseEvent.MOUSE_DRAGGED, e -> {
      pane.setTranslateX(pane.getTranslateX() + (e.getSceneX() - lastMousePos.getX()));
      pane.setTranslateY(pane.getTranslateY() + (e.getSceneY() - lastMousePos.getY()));
      lastMousePos = new Point2D(e.getSceneX(), e.getSceneY());
    });


    // Transition: vorgefertigte Animationen

    Path path = new Path();
    path.getElements().add(new MoveTo(100, 150));
    path.getElements().add(new CubicCurveTo(100, 200, 250, 200, 200, 110));

    PathTransition pathTransition = new PathTransition();
    pathTransition.setDuration(Duration.millis(1000));
    pathTransition.setNode(circle);
    pathTransition.setPath(path);
    pathTransition.setOrientation(OrientationType.ORTHOGONAL_TO_TANGENT);
    pathTransition.setCycleCount(PathTransition.INDEFINITE);
    pathTransition.setAutoReverse(true);

    pathTransition.play();
  }

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

}