默认IShellView背景上下文菜单中的粘贴和粘贴快捷方式变灰

问题描述 投票：0回答：1

我有一个同时使用 

SHCreateShellFolderView
和 
SHCreateDefaultContextMenu
的命名空间扩展。我还使用 
IShellFolderViewCB
和 
IContextMenuCB
创建默认对象。大多数预期功能都可以正常工作。例如：我可以双击“文件夹”项目来浏览它们，然后双击“非文件夹”项目来让应用程序根据提供的路径启动。

我的

IShellFolder
“文件夹”和“非文件夹”对象都有：

dwAttributes |= SFGAO_FILESYSTEM;
dwAttributes |= SFGAO_HASPROPSHEET;
dwAttributes |= SFGAO_CANCOPY;
dwAttributes |= SFGAO_CANMOVE;
dwAttributes |= SFGAO_CANLINK;
dwAttributes |= SFGAO_CANRENAME;
dwAttributes |= SFGAO_CANDELETE;

我的每个

IShellFolder
“文件夹”（目录）对象还具有：

dwAttributes |= SFGAO_STORAGEANCESTOR;
dwAttributes |= SFGAO_STORAGE;
dwAttributes |= SFGAO_FILESYSANCESTOR;
dwAttributes |= SFGAO_FOLDER;
dwAttributes |= SFGAO_BROWSABLE;
dwAttributes |= SFGAO_HASSUBFOLDER;
dwAttributes |= SFGAO_DROPTARGET;

在这两种情况下，我都会做正确的事情：

*pdwAttributes &= dwAttributes;

当我右键单击 

CDefView
中列出的“文件夹”对象之一以调出该文件夹的上下文菜单时，我可以清楚地看到 
Paste
已启用（深色，不是灰色）。

当我单击

CDefView
的空白背景区域时，会调出与空白区域（不是任何列出的项目）对应的文件夹的上下文菜单，即创建的树形控件的文件夹视图中，
Paste
和 
Paste shortcut
存在，但始终呈灰色，无论剪贴板上有什么。

我尝试了以下方法来获取 

Paste
和 
Paste
快捷方式以停止变灰：

  1. 调整 
    SFGAO_*
    标志。
  2. 禁用
    IContextMenuCB::Callback
    的调用。
  3. 禁用
    IShellFolderViewCB::MessageSFVCB
    的调用。
  4. 调整 
    IContextmenu
    中生成的 
    IShellFolder::CreateViewObject
    的关联。

IShellFolder::CreateViewObject
中生成关联的代码经过调整后目前是这样的：

else if (riid == IID_IContextMenu)
{
    ASSOCIATIONELEMENT rgClasses[5];

    unsigned short int i = 0;

    rgClasses[i++] = { ASSOCCLASS_PROGID_STR, 0, TEXT("Directory\\Background") };
    rgClasses[i++] = { ASSOCCLASS_PROGID_STR, 0, TEXT("Folder") };
    rgClasses[i++] = { ASSOCCLASS_PROGID_STR, 0, TEXT("Directory") };       
    rgClasses[i++] = { ASSOCCLASS_PROGID_STR, 0, TEXT("AllFilesystemObjects") };

    IQueryAssociations *pIQueryAssociationInfo = 0;

    hr = AssocCreateForClasses(&rgClasses[0], 1, IID_PPV_ARGS(&pIQueryAssociationInfo));

    if (SUCCEEDED(hr))
    {
        DEFCONTEXTMENU dcm = { hwndOwner, 0, this->pidl_absolute, this, 0, NULL, pIQueryAssociationInfo, 0, NULL };

        hr = SHCreateDefaultContextMenu(&dcm, riid, ppvOut);
    }
}

要使 

Paste
和 
Paste shortcut
停止为 
CDefView
中的背景上下文菜单变灰，需要什么？

更新：

当用户单击视图 (ShellView) 中列出的一项或多项时，shell 会调用 

IShellFolder::GetUIObjectOf
。当用户单击视图的背景 (
IShellView
) 时，shell 会调用 
IShellFolder::CreateViewObject
。请注意区别：单击文件夹“上”会导致 shell 选择调用哪个 
Object::Method
，即使文件夹是相同的。这意味着，当用户在视图的背景（空白区域）中右键单击时，从技术上讲，用户单击了正在呈现该视图（其子视图）的文件夹。但是，由于用户以这种方式单击文件夹“上”，所以 shell 选择 IShellFolder::CreateViewObject，而不是项目列表之一。
以下调用堆栈说明了 shell 正在执行的操作。


用户单击树视图中的文件夹。 shell 调用 
IShellFolder::CreateViewObject
，请求 
IDropTarget
。
BlockSet.dll!PartitionShellFolder::CreateViewObject(HWND__ * hwndOwner, const _GUID & riid, void * * ppvOut) Line 610   C++
shell32.dll!CDefView::CreateViewWindow3(struct IShellBrowser *,struct IShellView *,unsigned long,enum FOLDERFLAGS,enum FOLDERFLAGS,enum FOLDERVIEWMODE,struct _GUID const *,struct tagRECT const *,struct HWND__ * *)   Unknown
ExplorerFrame.dll!FileCabinet_CreateViewWindow2(struct IShellBrowser *,struct tagFolderSetDataBase *,struct IShellView *,struct IShellView *,struct tagRECT *,struct HWND__ * *)    Unknown
ExplorerFrame.dll!CShellBrowser::CreateViewWindow(struct IShellItem *,struct IShellView *,struct IShellView *,struct tagRECT *,struct HWND__ * *)   Unknown
ExplorerFrame.dll!CShellViewFactory::_CreateNewConnection(struct HWND__ *,struct IShellItem *,struct IUnknown *,struct IUnknown * *)    Unknown
ExplorerFrame.dll!CShellViewFactory::BeginCreateConnection(struct HWND__ *,struct IShellItem *,struct IUnknown *,struct IConnectionCreatedCallback *)   Unknown
ExplorerFrame.dll!CShellBrowser::_CreateConnectionForItem(struct IShellItem *,unsigned long,unsigned long)  Unknown
ExplorerFrame.dll!CShellBrowser::_CreateNewConnection(struct IShellItem *,unsigned long,unsigned long)  Unknown
ExplorerFrame.dll!CShellBrowser::_NavigateToPidl(struct _ITEMIDLIST_ABSOLUTE const *,unsigned long,unsigned long)   Unknown
ExplorerFrame.dll!CShellBrowser::_OnGoto(void)  Unknown
ExplorerFrame.dll!CShellBrowser::WndProcBS(struct HWND__ *,unsigned int,unsigned __int64,__int64)   Unknown
ExplorerFrame.dll!IEFrameWndProc(struct HWND__ *,unsigned int,unsigned __int64,__int64) Unknown
user32.dll!UserCallWinProcCheckWow()    Unknown
user32.dll!DispatchMessageWorker()  Unknown
ExplorerFrame.dll!CExplorerFrame::FrameMessagePump(void)    Unknown
ExplorerFrame.dll!BrowserThreadProc(struct IETHREADPARAM *) Unknown
ExplorerFrame.dll!BrowserNewThreadProc(void *)  Unknown
ExplorerFrame.dll!CExplorerTask::InternalResumeRT(void) Unknown
ExplorerFrame.dll!CRunnableTask::Run(void)  Unknown
shell32.dll!CShellTask::TT_Run(bool *)  Unknown
shell32.dll!CShellTaskThread::ThreadProc(void)  Unknown
shell32.dll!CShellTaskThread::s_ThreadProc(void *)  Unknown
shlwapi.dll!WrapperThreadProc(void *)   Unknown
kernel32.dll!BaseThreadInitThunk()  Unknown
ntdll.dll!RtlUserThreadStart()  Unknown



用户右键单击视图的空白区域 (
IShellView
)。请注意调用堆栈顶部附近名为 
Def_IsPasteAvailable
 的函数。在此调用堆栈之后，shell 立即调用四 (4) 个调用：
IDropTarget::Enter
、
IDropTarget::Leave
、
IDropTarget::Enter
、
IDropTarget::Leave
。
BlockSet.dll!DropTarget::DragEnter(IDataObject * pDataObj, unsigned long grfKeyState, _POINTL pt, unsigned long * pdwEffect) Line 80    C++
shell32.dll!Def_IsPasteAvailable()  Unknown
shell32.dll!Def_InitEditCommands()  Unknown
shell32.dll!CDefView::_Create_BackgrndHMENU(unsigned int,struct _GUID const &,void * *) Unknown
shell32.dll!CDefView::_CBackgrndMenu_CreateInstance(struct _GUID const &,void * *)  Unknown
shell32.dll!CDefView::GetItemObject(unsigned int,struct _GUID const &,void * *) Unknown
shell32.dll!CDefView::OnBackgroundContextMenu(struct tagPOINT const *)  Unknown
ExplorerFrame.dll!UIItemsView::ShowContextMenu(struct tagPOINT const *) Unknown
ExplorerFrame.dll!CItemsView::ShowContextMenu(struct tagPOINT const *)  Unknown
shell32.dll!CDefView::_OnContextMenu(__int64)   Unknown
shell32.dll!CDefView::WndProc(struct HWND__ *,unsigned int,unsigned __int64,__int64)    Unknown
shell32.dll!CDefView::s_WndProc(struct HWND__ *,unsigned int,unsigned __int64,__int64)  Unknown
user32.dll!UserCallWinProcCheckWow()    Unknown
user32.dll!CallWindowProcAorW() Unknown
user32.dll!CallWindowProcW()    Unknown
duser.dll!WndBridge::RawWndProc(struct HWND__ *,unsigned int,unsigned __int64,__int64)  Unknown
user32.dll!UserCallWinProcCheckWow()    Unknown
user32.dll!DispatchClientMessage()  Unknown
user32.dll!__fnDWORD()  Unknown
ntdll.dll!KiUserCallbackDispatcherContinue()    Unknown
user32.dll!NtUserMessageCall()  Unknown
user32.dll!RealDefWindowProcWorker()    Unknown
user32.dll!RealDefWindowProcW() Unknown
uxtheme.dll!_ThemeDefWindowProc(HWND__ * hwnd, unsigned int uMsg, unsigned __int64 wParam, __int64 lParam, int bUnicode) Line 1058  C++
uxtheme.dll!ThemeDefWindowProcW(HWND__ * hwnd, unsigned int uMsg, unsigned __int64 wParam, __int64 lParam) Line 1076    C++
user32.dll!DefWindowProcW() Unknown
ExplorerFrame.dll!UIItemsView::WndProc(struct HWND__ *,unsigned int,unsigned __int64,__int64)   Unknown
dui70.dll!DirectUI::HWNDElement::StaticWndProc(struct HWND__ *,unsigned int,unsigned __int64,__int64)   Unknown
user32.dll!UserCallWinProcCheckWow()    Unknown
user32.dll!CallWindowProcAorW() Unknown
user32.dll!CallWindowProcW()    Unknown
duser.dll!ExtraInfoWndProc(struct HWND__ *,unsigned int,unsigned __int64,__int64)   Unknown
user32.dll!UserCallWinProcCheckWow()    Unknown
user32.dll!CallWindowProcAorW() Unknown
user32.dll!CallWindowProcW()    Unknown
comctl32.dll!CallOriginalWndProc()  Unknown
comctl32.dll!CallNextSubclassProc() Unknown
comctl32.dll!DefSubclassProc()  Unknown
ExplorerFrame.dll!DefSubclassProc() Unknown
ExplorerFrame.dll!UIItemsView::_UIItemsViewSubclassProc(struct HWND__ *,unsigned int,unsigned __int64,__int64,unsigned __int64) Unknown
ExplorerFrame.dll!UIItemsView::s_UIItemsViewSubclassProc(struct HWND__ *,unsigned int,unsigned __int64,__int64,unsigned __int64,unsigned __int64)   Unknown
comctl32.dll!CallNextSubclassProc() Unknown
comctl32.dll!DefSubclassProc()  Unknown
ExplorerFrame.dll!DefSubclassProc() Unknown
ExplorerFrame.dll!CToolTipManager::_PropertyToolTipSubclassProc(struct HWND__ *,unsigned int,unsigned __int64,__int64,unsigned __int64) Unknown
ExplorerFrame.dll!CToolTipManager::s_PropertyToolTipSubclassProc(struct HWND__ *,unsigned int,unsigned __int64,__int64,unsigned __int64,unsigned __int64)   Unknown
comctl32.dll!CallNextSubclassProc() Unknown
comctl32.dll!DefSubclassProc()  Unknown
comctl32.dll!CallNextSubclassProc() Unknown
comctl32.dll!MasterSubclassProc()   Unknown
user32.dll!UserCallWinProcCheckWow()    Unknown
user32.dll!DispatchMessageWorker()  Unknown
ExplorerFrame.dll!CExplorerFrame::FrameMessagePump(void)    Unknown
ExplorerFrame.dll!BrowserThreadProc(struct IETHREADPARAM *) Unknown
ExplorerFrame.dll!BrowserNewThreadProc(void *)  Unknown
ExplorerFrame.dll!CExplorerTask::InternalResumeRT(void) Unknown
ExplorerFrame.dll!CRunnableTask::Run(void)  Unknown
shell32.dll!CShellTask::TT_Run(bool *)  Unknown
shell32.dll!CShellTaskThread::ThreadProc(void)  Unknown
shell32.dll!CShellTaskThread::s_ThreadProc(void *)  Unknown
shlwapi.dll!WrapperThreadProc(void *)   Unknown
kernel32.dll!BaseThreadInitThunk()  Unknown
ntdll.dll!RtlUserThreadStart()  Unknown



shell 调用 
IShellFolder::CreateViewObject
，请求 
IContextMenu
:
BlockSet.dll!PartitionShellFolder::CreateViewObject(HWND__ * hwndOwner, const _GUID & riid, void * * ppvOut) Line 571   C++
shell32.dll!CDefView::_CBackgrndMenu_CreateInstance(struct _GUID const &,void * *)  Unknown
shell32.dll!CDefView::GetItemObject(unsigned int,struct _GUID const &,void * *) Unknown
shell32.dll!CDefView::OnBackgroundContextMenu(struct tagPOINT const *)  Unknown
ExplorerFrame.dll!UIItemsView::ShowContextMenu(struct tagPOINT const *) Unknown
ExplorerFrame.dll!CItemsView::ShowContextMenu(struct tagPOINT const *)  Unknown
shell32.dll!CDefView::_OnContextMenu(__int64)   Unknown
shell32.dll!CDefView::WndProc(struct HWND__ *,unsigned int,unsigned __int64,__int64)    Unknown
shell32.dll!CDefView::s_WndProc(struct HWND__ *,unsigned int,unsigned __int64,__int64)  Unknown
user32.dll!UserCallWinProcCheckWow()    Unknown
user32.dll!CallWindowProcAorW() Unknown
user32.dll!CallWindowProcW()    Unknown
duser.dll!WndBridge::RawWndProc(struct HWND__ *,unsigned int,unsigned __int64,__int64)  Unknown
user32.dll!UserCallWinProcCheckWow()    Unknown
user32.dll!DispatchClientMessage()  Unknown
user32.dll!__fnDWORD()  Unknown
ntdll.dll!KiUserCallbackDispatcherContinue()    Unknown
user32.dll!NtUserMessageCall()  Unknown
user32.dll!RealDefWindowProcWorker()    Unknown
user32.dll!RealDefWindowProcW() Unknown
uxtheme.dll!_ThemeDefWindowProc(HWND__ * hwnd, unsigned int uMsg, unsigned __int64 wParam, __int64 lParam, int bUnicode) Line 1058  C++
uxtheme.dll!ThemeDefWindowProcW(HWND__ * hwnd, unsigned int uMsg, unsigned __int64 wParam, __int64 lParam) Line 1076    C++
user32.dll!DefWindowProcW() Unknown
ExplorerFrame.dll!UIItemsView::WndProc(struct HWND__ *,unsigned int,unsigned __int64,__int64)   Unknown
dui70.dll!DirectUI::HWNDElement::StaticWndProc(struct HWND__ *,unsigned int,unsigned __int64,__int64)   Unknown
user32.dll!UserCallWinProcCheckWow()    Unknown
user32.dll!CallWindowProcAorW() Unknown
user32.dll!CallWindowProcW()    Unknown
duser.dll!ExtraInfoWndProc(struct HWND__ *,unsigned int,unsigned __int64,__int64)   Unknown
user32.dll!UserCallWinProcCheckWow()    Unknown
user32.dll!CallWindowProcAorW() Unknown
user32.dll!CallWindowProcW()    Unknown
comctl32.dll!CallOriginalWndProc()  Unknown
comctl32.dll!CallNextSubclassProc() Unknown
comctl32.dll!DefSubclassProc()  Unknown
ExplorerFrame.dll!DefSubclassProc() Unknown
ExplorerFrame.dll!UIItemsView::_UIItemsViewSubclassProc(struct HWND__ *,unsigned int,unsigned __int64,__int64,unsigned __int64) Unknown
ExplorerFrame.dll!UIItemsView::s_UIItemsViewSubclassProc(struct HWND__ *,unsigned int,unsigned __int64,__int64,unsigned __int64,unsigned __int64)   Unknown
comctl32.dll!CallNextSubclassProc() Unknown
comctl32.dll!DefSubclassProc()  Unknown
ExplorerFrame.dll!DefSubclassProc() Unknown
ExplorerFrame.dll!CToolTipManager::_PropertyToolTipSubclassProc(struct HWND__ *,unsigned int,unsigned __int64,__int64,unsigned __int64) Unknown
ExplorerFrame.dll!CToolTipManager::s_PropertyToolTipSubclassProc(struct HWND__ *,unsigned int,unsigned __int64,__int64,unsigned __int64,unsigned __int64)   Unknown
comctl32.dll!CallNextSubclassProc() Unknown
comctl32.dll!DefSubclassProc()  Unknown
comctl32.dll!CallNextSubclassProc() Unknown
comctl32.dll!MasterSubclassProc()   Unknown
user32.dll!UserCallWinProcCheckWow()    Unknown
user32.dll!DispatchMessageWorker()  Unknown
ExplorerFrame.dll!CExplorerFrame::FrameMessagePump(void)    Unknown
ExplorerFrame.dll!BrowserThreadProc(struct IETHREADPARAM *) Unknown
ExplorerFrame.dll!BrowserNewThreadProc(void *)  Unknown
ExplorerFrame.dll!CExplorerTask::InternalResumeRT(void) Unknown
ExplorerFrame.dll!CRunnableTask::Run(void)  Unknown
shell32.dll!CShellTask::TT_Run(bool *)  Unknown
shell32.dll!CShellTaskThread::ThreadProc(void)  Unknown
shell32.dll!CShellTaskThread::s_ThreadProc(void *)  Unknown
shlwapi.dll!WrapperThreadProc(void *)   Unknown
kernel32.dll!BaseThreadInitThunk()  Unknown
ntdll.dll!RtlUserThreadStart()  Unknown


    
	




c++

windows

com

windows-shell

shell-namespace-extension


1个回答




    
    
    

        

            

                

                    
0
投票

                    
                

            

        

        
五个基本组件之一
：

Windows Explorer File Basic Components
当右键单击此文件夹视图中的一项（或多个选定项）（或树视图中的项）时，Shell 将为各种接口调用 
IShellFolder::GetUIObjectOf
 并传递 PIDL所选项目。
当右键单击没有项目的文件夹视图时，它将为各种接口调用 
IShellFolder::CreateViewObject
，因为没有 PIDL 可供使用，因为它与显示的文件夹本身有关。
对于右键单击上下文菜单的 
IContextMenu
 以及其他接口，例如用于拖放以及复制/粘贴操作的 
IDropTarget
 来说，情况也是如此。
要询问 
IDropTarget
，Shell 文件夹必须公开 
SFGAO_DROPTARGET
 “指定的项目是放置目标” 属性。
我在这里创建了一个Shell命名空间扩展示例
https://github.com/smourier/ExplorerDataProvider/tree/main
基于微软官方的one，演示了（有限）IDropTarget支持，足以用于“粘贴” “要启用的菜单项。
PS：GetUIObjectOf 和 CreateViewObject 通常可以共享很多代码，只是以通用的方式处理 PIDL 的存在或不存在。

    

	

    

    


  

  

    
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