How to firing Zoomevent in Javafx 8 - event-handling

Question

I'm working on a very simple program. I have an ImageView and I want to firing to this ImageView a ZoomEvent that I created. In Javafx 8 there 2 constructor that I can use to create ZoomEvent. But the listeners doesn't catch the event.
StackPane root = new StackPane();
final ImageView img = new ImageView(url);
img.setOnZoom(new EventHandler<ZoomEvent>() {
#Override
public void handle(ZoomEvent t) {
System.out.println("Zoom!");
}
});
img.setOnZoomStarted(new EventHandler<ZoomEvent>() {
#Override
public void handle(ZoomEvent t) {
System.out.println("Zoom Started!");
}
});
img.setOnZoomFinished(new EventHandler<ZoomEvent>() {
#Override
public void handle(ZoomEvent t) {
System.out.println("Zoom finished!");
}
});
ZoomEvent evt = new ZoomEvent(ZoomEvent.ANY, 200,200,200,200,false,false,false,false,false, false, 5.0,5.0, null);
root.getChildren().add(img);
Scene scene = new Scene(root, 600, 600);
primaryStage.setTitle("Zoom Sample");
primaryStage.setScene(scene);
primaryStage.show();
This is my code so far and I can't figure out what is wrong. There isn't any output.

Answer 1

You never fired the event with ZoomEvent.fireEvent(target, event) or stage.fireEvent(event).
You created the wrong type of event (create a ZoomEvent.ZOOM, not a ZoomEvent.ANY).
You didn't set the event screen co-ordinates correctly.
Working sample:
import javafx.application.Application;
import javafx.geometry.Point2D;
import javafx.scene.Scene;
import javafx.scene.image.ImageView;
import javafx.scene.input.ZoomEvent;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class Zoom extends Application {
public static void main(String[] args) { launch(args); }
#Override
public void start(Stage stage) {
final ImageView img = new ImageView(
"http://icons.iconarchive.com/icons/kirei-kaze/kikis-delivery-service/256/jiji-icon.png" // image license: License: Free for non-commercial use. The products or characters depicted in these icons are © by Studio Ghibli. Linkback: http://www.iconarchive.com/artist/kirei-kaze.html
);
img.setOnZoom(e -> System.out.println("Zoom!"));
StackPane layout = new StackPane(img);
stage.setScene(new Scene(layout, 600, 600));
stage.show();
Point2D screenCoords = layout.localToScreen(300, 300);
ZoomEvent evt = new ZoomEvent(
ZoomEvent.ZOOM,
300, 300,
screenCoords.getX(), screenCoords.getY(),
false,false,false,false,false, false, 5.0,5.0, null
);
ZoomEvent.fireEvent(img, evt);
}
}