GridLienzoPanel.java 文件源码

private void setupDefaultHandlers() {
    //Prevent DOMElements scrolling into view when they receive the focus
    domElementContainer.addDomHandler(new ScrollHandler() {

                                          @Override
                                          public void onScroll(final ScrollEvent scrollEvent) {
                                              domElementContainer.getElement().setScrollTop(0);
                                              domElementContainer.getElement().setScrollLeft(0);
                                          }
                                      },
                                      ScrollEvent.getType());
    addAttachHandler(new AttachEvent.Handler() {
        @Override
        public void onAttachOrDetach(final AttachEvent event) {
            if (event.isAttached()) {
                onResize();
            }
        }
    });
    addMouseDownHandler((e) -> setFocus(true));
}