Invalidation Listeners

Invalidation listeners tem um método simples que você subscreve com expressões lambda. Vamos utilizar sem o método lambda. Quando você clicar no StackPane, o clique do mouse vai rotacionar o StackPane.

O segundo objeto Text irá mostrar o status da animação da RotationTransition, que apenas manipula a propriedade de status de leitura. Você verá RUNNING, PAUSED ou STOPPED.

O código ficará assim:

package sample;<br><br>import javafx.animation.Animation;<br>import javafx.animation.Interpolator;<br>import javafx.animation.RotateTransition;<br>import javafx.application.Application;<br>import javafx.beans.InvalidationListener;<br>import javafx.beans.Observable;<br>import javafx.beans.value.ObservableObjectValue;<br>import javafx.geometry.Pos;<br>import javafx.scene.Scene;<br>import javafx.scene.effect.Reflection;<br>import javafx.scene.layout.StackPane;<br>import javafx.scene.layout.VBox;<br>import javafx.scene.paint.Color;<br>import javafx.scene.shape.Ellipse;<br>import javafx.scene.text.Font;<br>import javafx.scene.text.Text;<br>import javafx.stage.Stage;<br>import javafx.util.Duration;<br><br>public class Main extends Application {<br><br>    @Override<br>    public void start(Stage stage) throws Exception {<br>        Ellipse ellipse = new Ellipse(110, 70);<br>        ellipse.setFill(Color.<em>LIGHTBLUE</em>);<br>        Text text = new Text("Minhas Formas");<br>        text.setFont(new Font("Arial Bold", 24));<br><br>        Reflection r = new Reflection();<br>        r.setFraction(.8);<br>        r.setTopOffset(1.0);<br>        text.setEffect(r);<br><br>        StackPane stackPane = new StackPane();<br><br>        <em>// Define RotateTransition<br></em><em>        </em>RotateTransition rotate = new RotateTransition(<br>                Duration.<em>millis</em>(2500), stackPane);<br>        rotate.setToAngle(360);<br>        rotate.setFromAngle(0);<br>        rotate.setInterpolator(Interpolator.<em>LINEAR</em>);<br>        <em>// configure mouse click handler<br></em><em>        </em>stackPane.setOnMouseClicked(mouseEvent -&gt; {<br>            if (rotate.getStatus().equals(Animation.Status.<em>RUNNING</em>)) {<br>                rotate.pause();<br>            } else {<br>                rotate.play();<br>            }<br>        });<br><br>        stackPane.getChildren().addAll(ellipse, text);<br><br><br>        Text text2 = new Text("");<br>        text2.setFont(new Font("Arial Bold", 24));<br><br>        rotate.statusProperty().addListener(new InvalidationListener() {<br>            @Override<br>            public void invalidated(Observable observable) {<br>                text2.setText("Animation status: " +<br>                        ((ObservableObjectValue&lt;Animation.Status&gt;)observable)<br>                                .getValue());<br>            }<br>        });<br><br>        VBox vBox = new VBox();<br>        vBox.setAlignment(Pos.<em>CENTER</em>);<br>        vBox.getChildren().addAll(stackPane, text2);<br><br>        Scene scene = new Scene(vBox, 350, 330, Color.<em>LIGHTYELLOW</em>);<br>        stage.setTitle("Minhas Formas com JavaFX");<br>        stage.setScene(scene);<br>        stage.show();<br>    }<br><br><br>    public static void main(String[] args) {<br>        <em>launch</em>(args);<br>    }<br>}

package sample; import javafx.animation.Animation; import javafx.animation.Interpolator; import javafx.animation.RotateTransition; import javafx.application.Application; import javafx.beans.InvalidationListener; import javafx.beans.Observable; import javafx.beans.value.ObservableObjectValue; import javafx.geometry.Pos; import javafx.scene.Scene; import javafx.scene.effect.Reflection; import javafx.scene.layout.StackPane; import javafx.scene.layout.VBox; import javafx.scene.paint.Color; import javafx.scene.shape.Ellipse; import javafx.scene.text.Font; import javafx.scene.text.Text; import javafx.stage.Stage; import javafx.util.Duration; public class Main extends Application { @Override public void start(Stage stage) throws Exception { Ellipse ellipse = new Ellipse(110, 70); ellipse.setFill(Color.LIGHTBLUE); Text text = new Text("Minhas Formas"); text.setFont(new Font("Arial Bold", 24)); Reflection r = new Reflection(); r.setFraction(.8); r.setTopOffset(1.0); text.setEffect(r); StackPane stackPane = new StackPane(); // Define RotateTransition RotateTransition rotate = new RotateTransition( Duration.millis(2500), stackPane); rotate.setToAngle(360); rotate.setFromAngle(0); rotate.setInterpolator(Interpolator.LINEAR); // configure mouse click handler stackPane.setOnMouseClicked(mouseEvent -> { if (rotate.getStatus().equals(Animation.Status.RUNNING)) { rotate.pause(); } else { rotate.play(); } }); stackPane.getChildren().addAll(ellipse, text); Text text2 = new Text(""); text2.setFont(new Font("Arial Bold", 24)); rotate.statusProperty().addListener(new InvalidationListener() { @Override public void invalidated(Observable observable) { text2.setText("Animation status: " + ((ObservableObjectValue<Animation.Status>)observable) .getValue()); } }); VBox vBox = new VBox(); vBox.setAlignment(Pos.CENTER); vBox.getChildren().addAll(stackPane, text2); Scene scene = new Scene(vBox, 350, 330, Color.LIGHTYELLOW); stage.setTitle("Minhas Formas com JavaFX"); stage.setScene(scene); stage.show(); } public static void main(String[] args) { launch(args); } }