GWT disable text selection in an HTMLTable

While modifying FlexTable to handle cell selection It took me a while to figure out how to disable the native text selection behavior of the browsers on 'SHIFT+Click' events. Turns out this native javascript function does the job pretty well. I tried playing with event.preventDefault() and event.stopPropagation() but that didn't work.

private native static void disableTextSelectInternal(Element e, boolean disable)/*-{
    if (disable) {
        e.ondrag = function () { return false; };
        e.onselectstart = function () { return false; };
        e.style.MozUserSelect="none"
    } else {
        e.ondrag = null;
        e.onselectstart = null;
        e.style.MozUserSelect="text"
    }
}-*/;

@Override
public void onKeyDown(KeyDownEvent event) {
    if (event.isShiftKeyDown()) {
        disableTextSelectInternal(table.getElement(), true);
    }
    ...