GreenScrollPanel.java 文件源码

public GreenScrollPanel(boolean withHorizontalScroll) {
    mainPanel = new ResizeLayoutPanel() {
        @Override
        protected void onAttach() {
            super.onAttach();
            // hack to hide scrollbar in chrome when leaflet map is also
            // displayed (check GreenScrollImpl.onAttach too)
            if (isChrome()) {
                try {
                    ((Element) (getElement().getChild(1))).getStyle().setZIndex(-1000);
                    ((Element) (getElement().getChild(2))).getStyle().setZIndex(-1000);
                } catch (Exception e) {
                    GWT.log("", e);
                }
            }

        }
    };

    if (hasMacNanoScrollBar()) {
        this.impl = new ScrollPanel();
    } else {
        this.impl = new GreenScrollImpl(withHorizontalScroll);
    }

    mainPanel.setWidget(impl);

    impl.addDomHandler(new MouseWheelHandler() {

        @Override
        public void onMouseWheel(MouseWheelEvent event) {
            event.stopPropagation();
        }
    }, MouseWheelEvent.getType());

}