AppDocObserverDelegate appDocumentCreating appDocumentIsBeingDestructed delegateName documentRestore documentSave getGuiDocDelegateName IDocument m_pDoc setDocument ~AppDocObserverDelegate

appDocumentCreating() virtual void appDocumentCreating ( ) virtual 应用文档开始创建时回调 在 App::IDocument 构造过程中触发，可执行自定义初始化。