Moving an undecorated stage in javafx 2

Question

I\'ve been trying to move an undecorated stage around the screen, by using the following mouse listeners:

• onPressed
• onReleased
• onDragged

Answer 1

My guess is that your:

onRectangleReleased()

is passing the very same coordinates from your

onRectanglePressed()

This happens because as stated in the documentation the getX() method from the MouseEvent class returns

Horizontal position of the event relative to the origin of the MouseEvent's source.

then, when you release your mouse it actually puts your rectangle in the place it was when you first mouse pressed.

BTW, I use a StackPane with a Rectangle inside and then apply the following code:

private void addDragListeners(final Node n){
       n.setOnMousePressed(new EventHandler() {
            @Override
            public void handle(MouseEvent me) {
                if(me.getButton()!=MouseButton.MIDDLE)
                {
                    initialX = me.getSceneX();
                    initialY = me.getSceneY();
                }
                else
                {
                    n.getScene().getWindow().centerOnScreen();
                    initialX = n.getScene().getWindow().getX();
                    initialY = n.getScene().getWindow().getY();
                }

            }
       });

       n.setOnMouseDragged(new EventHandler() {
            @Override
            public void handle(MouseEvent me) {
                if(me.getButton()!=MouseButton.MIDDLE)
                {
                    n.getScene().getWindow().setX( me.getScreenX() - initialX );
                    n.getScene().getWindow().setY( me.getScreenY() - initialY);
                }
            }
        });
}

addDragListeners(mainStackPane);

Besides that, I use the Middle Mouse Button to center my Window on the screen. I hoped it helped. Cheers!