How can I stop a MouseEvent in JavaFX? - javafx

Question

(Sorry for my poor English)
I don't know how I can stop a Mouse Event in JavaFX.
This code generates a small image into a large rectangle when I press a button and then pressed the large rectangle, but if I press again the big rectangle is rebuilt a new image.
I dont want to generate a new image, how Can I do that?
button.setOnAction((ActionEvent t) -> {
rectangle.setOnMouseClicked((MouseEvent me) -> {
Rectangle asdf = new Rectangle(48, 48, Color.TRANSPARENT);
StackPane imageContainer = new StackPane();
ImageView image = new ImageView("firefox-icono-8422-48.png");
imageContainer.getChildren().addAll(asdf, image);
imageContainer.setTranslateX(me.getX());
imageContainer.setTranslateY(me.getY());
enableDragging(imageContainer);
rootGroup.getChildren().add(imageContainer);
myList2.add(imageContainer);
});
});
Thanks
PS: t.consume() and me.consume(); don't anything.

Answer 1

I'm not sure I have interpreted your question correctly, but if you want to "turn off" the mouse click handler on the rectangle, you can just call
rectangle.setOnMouseClicked(null);
Complete example:
import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
public class ActivateRectangleWithButton extends Application {
#Override
public void start(Stage primaryStage) {
Rectangle border = new Rectangle(100, 100, Color.TRANSPARENT);
Rectangle rect = new Rectangle(80, 80, Color.CORNFLOWERBLUE);
StackPane stack = new StackPane(border, rect);
Button button = new Button("Activate");
button.setOnAction(evt -> {
border.setFill(Color.BLUE);
rect.setOnMouseClicked(me -> {
System.out.println("Active rectangle was clicked!");
// de-activate:
border.setFill(Color.TRANSPARENT);
rect.setOnMouseClicked(null);
});
});
VBox root = new VBox(20, stack, button);
root.setAlignment(Pos.CENTER);
Scene scene = new Scene(root, 300, 300);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}