SWTUtil.java 文件源码

/**
 * Returns the shell for the given widget. If the widget doesn't represent
 * a SWT object that manage a shell, <code>null</code> is returned.
 * @param widget the widget
 *
 * @return the shell for the given widget
 */
public static Shell getShell(Widget widget) {
    if (widget instanceof Control)
        return ((Control)widget).getShell();
    if (widget instanceof Caret)
        return ((Caret)widget).getParent().getShell();
    if (widget instanceof DragSource)
        return ((DragSource)widget).getControl().getShell();
    if (widget instanceof DropTarget)
        return ((DropTarget)widget).getControl().getShell();
    if (widget instanceof Menu)
        return ((Menu)widget).getParent().getShell();
    if (widget instanceof ScrollBar)
        return ((ScrollBar)widget).getParent().getShell();

    return null;
}