protected void addKeyHandlers() { KeyDownHandler keyDownHandler = new KeyDownHandler() { private final Integer KEY_F = 70; @Override public void onKeyDown(KeyDownEvent event) { event.stopPropagation(); event.preventDefault(); if (event.isControlKeyDown() && event.getNativeEvent().getKeyCode() == KEY_F) { diagramPane.showSearchPopup(); } } }; KeyUpHandler keyUpHandler = new KeyUpHandler() { @Override public void onKeyUp(KeyUpEvent event) { event.stopPropagation(); event.preventDefault(); if (KeyCodeEvent.isArrow(event.getNativeKeyCode())) { arrowKeyUp(event); } } }; canvas.addKeyDownHandler(keyDownHandler); canvas.addKeyUpHandler(keyUpHandler); }