No touch event is generated from mac book pro trackpad

Question

I am developing a multiltouch javafx application on mac, but no touch event was caught by the handler using trackpad. The event handlers are added to scence.
I am using JDK1.7.0_07.
Any one has any idea.
Thanks.

Answer 1

I don't think this will work. The javadocs for the TouchEvent explicitly state
"Touch event indicates a touch screen action."
The trackpad is not a touch screen.
The trackpad will generate GestureEvents. Again, from the javadocs:
"Gestures are typically caused by direct (touch screen) or indirect (track pad) touch events."
So you can handle things like ScrollEvent, RotateEvent, and ZoomEvent. I think the mapping between physical gestures on the trackpad and semantic events is managed by the OS (so behaviors might change if the user changes trackpad settings in System Preferences, for example). It doesn't sound like this will meet your needs, but maybe...
I don't know if there's any other way to interact with the trackpad (someone else surely will).
Here's a simple way to see what events are being generated (it will generate quite a lot of output).
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.input.InputEvent;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;
public class TouchTest extends Application {
  @Override
  public void start(Stage primaryStage) throws Exception {
    Scene scene = new Scene(new AnchorPane(), 400,400);
    scene.addEventHandler(InputEvent.ANY, new EventHandler<InputEvent>() {
      @Override
      public void handle(InputEvent event) {
        System.out.println(event.getEventType().getName());
    primaryStage.setScene(scene);
    primaryStage.sizeToScene();
    primaryStage.show();
  public static void main(String[] args) {
    launch(args);
}