DraggablePanel.java 文件源码

@Override
protected boolean changeTarget(Widget aMovableTarget, Widget aResizableTarget, int dx, int dy, MouseEvent<?> aEvent) {
    if (isNresizable()) {
        double newTop = targetScrollTop + dy;
        aMovableTarget.getElement().getStyle().setTop(newTop >= 0 ? newTop : 0, Style.Unit.PX);
        if (newTop >= 0) {
            aResizableTarget.getElement().getStyle().setHeight(targetHeight - dy, Style.Unit.PX);
            /*
            if (aResizableTarget instanceof RequiresResize) {
                ((RequiresResize) aResizableTarget).onResize();
            }
            */
        }
        return true;
    } else {
        return false;
    }
}