_pAttachObject addExtensionSection canDelete claimChildren delegateName doubleClicked finishRestoring getAttachIDocumentObject getMDIView getViewProvider hide m_pViewProviewr setAttach setViewProvider show viewProviderCreating viewProviderIsBeingDestructed ViewProviderObserverDelegate viewProviderOnChange ~ViewProviderObserverDelegate

doubleClicked() virtual bool doubleClicked ( void  ) virtual 处理双击事件 当视图提供者被双击时触发，可执行自定义逻辑。 返回 true 表示事件已处理；false 表示未处理