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    <p>Well I think your code is OK, seems to run fine for me and operate without any clear issue using jdk7u7 on windows 7.</p> <p>I think maybe you want to call <code>rect.setMouseTransparent(true)</code>, so that the rectangles don't catch the clicks. The mouse transparency thing isn't to do with the adding and removing of rectangles, it's just the way that picking works in JavaFX.</p> <p>You may want to consider placing your Test node in a pannable <a href="http://docs.oracle.com/javafx/2/api/javafx/scene/control/ScrollPane.html" rel="nofollow noreferrer"><code>ScrollPane</code></a> rather than implementing the panning yourself - might need to wrap it in a <code>Group</code> to get the appropriate behaviour. But the code you have is simple and seems to work fine, so perhaps use of a <code>ScrollPane</code> is unnecessary and may even confuse things more.</p> <p>There is a <a href="http://docs.oracle.com/javafx/2/api/javafx/scene/canvas/Canvas.html" rel="nofollow noreferrer"><code>Canvas</code></a> class in Java, which is something different from what you have, so calling your node something other than <code>Canvas</code> is probably a good idea.</p> <p>Not to do with your question, but using a <a href="http://docs.oracle.com/javafx/2/api/javafx/animation/Timeline.html" rel="nofollow noreferrer"><code>Timeline</code></a> is my preferred way to handle animation rather than a <code>Timer</code>, though the <code>Timer</code> method will still work as long as you correctly use <code>Platform.runLater</code> as you are doing.</p> <p>Here's a modified sample using a <code>Timeline</code> and <code>.mouseTransparent()</code> with an added frame counter so that it is clear that animation is happening.</p> <pre><code>import javafx.animation.*; import javafx.application.Application; import javafx.beans.binding.Bindings; import javafx.beans.property.*; import javafx.event.*; import javafx.scene.Scene; import javafx.scene.control.Label; import javafx.scene.input.MouseEvent; import javafx.scene.layout.StackPane; import javafx.scene.paint.Color; import javafx.scene.shape.Rectangle; import javafx.stage.Stage; import javafx.util.Duration; class Test extends StackPane { private Rectangle rect; private double pressedX, pressedY; private LongProperty frame = new SimpleLongProperty(); public Test() { setMinSize(600, 600); setStyle("-fx-border-color: blue;"); Label count = new Label(); count.textProperty().bind(Bindings.convert(frame)); getChildren().add(count); count.setMouseTransparent(true); setOnMousePressed(new EventHandler&lt;MouseEvent&gt;() { public void handle(MouseEvent event) { pressedX = event.getX(); pressedY = event.getY(); } }); setOnMouseDragged(new EventHandler&lt;MouseEvent&gt;() { public void handle(MouseEvent event) { setTranslateX(getTranslateX() + event.getX() - pressedX); setTranslateY(getTranslateY() + event.getY() - pressedY); event.consume(); } }); Timeline t = new Timeline(new KeyFrame(Duration.millis(100), new EventHandler&lt;ActionEvent&gt;() { @Override public void handle(ActionEvent event) { frame.set(frame.get() + 1); if (rect != null) { getChildren().remove(rect); } rect = new Rectangle(10, 10, 200, 200); rect.setFill(Color.RED); rect.setMouseTransparent(true); getChildren().add(0, rect); } })); t.setCycleCount(Timeline.INDEFINITE); t.play(); } } public class TestApplication extends Application { public static void main(String[] args) { launch(args); } @Override public void start(Stage stage) { stage.setScene(new Scene(new Test())); stage.show(); } } </code></pre> <p><img src="https://i.stack.imgur.com/8nvk3.png" alt="Sample program output"></p>
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    1. COThank you very much! The setMouseTransparent(true) method was what I was looking for. The other points are also very good, but they don't apply for my real project, only to my small example, they are nevertheless valid points!
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