canClose delegateName documentCreating documentIsBeingDestructed documentRestore documentSave GuiDocObserverDelegate m_pDoc setDocument ~GuiDocObserverDelegate

documentSave() virtual void documentSave ( Base::Writer &  writer ) virtual 保存文档时回调 在文档序列化阶段触发，可写入额外数据到 writer。 参数 [in] writer 序列化写入器