javafx.event.EventDispatchChain Java Examples

@Override
public Event dispatchEvent(final Event event,
		final EventDispatchChain tail) {
	if (JAVA_8) {
		// XXX: Ensure key events that result from to be ignored SWT key
		// events (doit == false) are forwarded as consumed
		// (https://bugs.openjdk.java.net/browse/JDK-8159227)
		// TODO: Remove when dropping support for JavaSE-1.8.
		if (event instanceof javafx.scene.input.KeyEvent) {
			org.eclipse.swt.widgets.Event lastDownEvent = unprocessedKeyDownEvents
					.peek();
			if (event.getEventType()
					.equals(javafx.scene.input.KeyEvent.KEY_PRESSED)) {
				if (!lastDownEvent.doit) {
					event.consume();
				}
				// remove key down event and save it so that its doit
				// flag can be checked in case a KEY_TYPED event is
				// generated for it
				downEvent = unprocessedKeyDownEvents.poll();
				// System.out.println("pressed "
				// + ((javafx.scene.input.KeyEvent) event)
				// .getCode()
				// + " :: " + "down="
				// + unprocessedKeyDownEvents.size() + ", up="
				// + unprocessedKeyUpEvents.size());
			} else if (event.getEventType()
					.equals(javafx.scene.input.KeyEvent.KEY_TYPED)) {
				// consume event if last key down event was consumed
				if (!downEvent.doit) {
					event.consume();
				}
				// System.out.println("typed "
				// + ((javafx.scene.input.KeyEvent) event)
				// .getCharacter()
				// + " :: " + "down="
				// + unprocessedKeyDownEvents.size() + ", up="
				// + unprocessedKeyUpEvents.size());
			} else if (event.getEventType()
					.equals(javafx.scene.input.KeyEvent.KEY_RELEASED)) {
				// remove key up event
				org.eclipse.swt.widgets.Event lastUpEvent = unprocessedKeyUpEvents
						.poll();
				if (!lastUpEvent.doit) {
					event.consume();
				}
				// System.out.println("released "
				// + ((javafx.scene.input.KeyEvent) event)
				// .getCode()
				// + " :: " + "down="
				// + unprocessedKeyDownEvents.size() + ", up="
				// + unprocessedKeyUpEvents.size());
			}
		}
	}

	// dispatch the most recent event
	Event returnedEvent = delegate.dispatchEvent(event, tail);

	// update UI (added to fix
	// https://bugs.openjdk.java.net/browse/JDK-8161587)
	long millisNow = System.currentTimeMillis();
	if (millisNow - lastRedrawMillis > REDRAW_INTERVAL_MILLIS) {
		redraw();
		if (WIN32) {
			// XXX: Only call update() on some platforms to prevent a
			// loss of performance while keeping the UI up-to-date.
			update();
		}
		lastRedrawMillis = millisNow;
	}
	// return dispatched event
	return returnedEvent;
}
 

@Override
public Event dispatchEvent(Event event, EventDispatchChain tail) {

	if (event instanceof MouseEvent){
        MouseEvent m = (MouseEvent)event;
        if (event.getEventType().equals(MouseEvent.MOUSE_CLICKED) ||
            event.getEventType().equals(MouseEvent.MOUSE_PRESSED)) {
            Point2D origin = new Point2D(m.getX(),m.getY());
            if (limit != null)
            	allowDrag = !(origin.getX() < limit.getX() && origin.getY() < limit.getY());
        }

        // avoid selection with mouse dragging, allowing dragging the scrollbars
        if (event.getEventType().equals(MouseEvent.MOUSE_DRAGGED)) {
            if(!allowDrag){
                event.consume();
            }
        }
        // Avoid selection of word, line, paragraph with mouse click
        if(m.getClickCount() > 1){
            event.consume();
        }
    }

    if (event instanceof KeyEvent && event.getEventType().equals(KeyEvent.KEY_PRESSED)){
        KeyEvent k = (KeyEvent)event;
        // Avoid copy with Ctrl+C or Ctrl+Insert
        if((k.getCode().equals(KeyCode.C) || k.getCode().equals(KeyCode.INSERT)) && k.isControlDown()){
            event.consume();
        }
        // Avoid selection with shift+Arrow
        if(k.isShiftDown() && (k.getCode().equals(KeyCode.RIGHT) || k.getCode().equals(KeyCode.LEFT) ||
            k.getCode().equals(KeyCode.UP) || k.getCode().equals(KeyCode.DOWN))){
            event.consume();
        }
    }
    return oldDispatcher.dispatchEvent(event, tail);
}
 

@Override
public Event dispatchEvent(Event event, EventDispatchChain tail) {

    if (event instanceof MouseEvent) {
        MouseEvent mouseEvent = (MouseEvent) event;
        if (mouseEvent.getClickCount() > 1) {
            if (disableDoubleClick) {
                mouseEvent.consume();
            }
        }
    }
    return originalDispatcher.dispatchEvent(event, tail);
}
 

@Override
public EventDispatchChain buildEventDispatchChain(EventDispatchChain tail) {
	return super.buildEventDispatchChain(tail).append(eventHandlerManager);
}
 

/**
 * {@inheritDoc}
 */
@Override
public EventDispatchChain buildEventDispatchChain(EventDispatchChain tail) {
    return super.buildEventDispatchChain(tail).prepend(eventHandlerManager);
}
 

/**
 * {@inheritDoc}
 */
@Override
public EventDispatchChain buildEventDispatchChain(EventDispatchChain tail) {
    return super.buildEventDispatchChain(tail).prepend(eventHandlerManager);
}