自学教程：C++ CanPaste函数代码示例

void CPWL_Edit::PasteText() {  if (!CanPaste())    return;  CFX_WideString swClipboard;  if (IFX_SystemHandler* pSH = GetSystemHandler())    swClipboard = pSH->GetClipboardText(GetAttachedHWnd());  if (m_pFillerNotify) {    FX_BOOL bRC = TRUE;    FX_BOOL bExit = FALSE;    CFX_WideString strChangeEx;    int nSelStart = 0;    int nSelEnd = 0;    GetSel(nSelStart, nSelEnd);    m_pFillerNotify->OnBeforeKeyStroke(GetAttachedData(), swClipboard,                                       strChangeEx, nSelStart, nSelEnd, TRUE,                                       bRC, bExit, 0);    if (!bRC)      return;    if (bExit)      return;  }  if (swClipboard.GetLength() > 0) {    Clear();    InsertText(swClipboard.c_str());  }}

void wxTextCtrl::OnKeyDown(wxKeyEvent& event){    if ( event.GetModifiers() == wxMOD_CONTROL )    {        switch( event.GetKeyCode() )        {            case 'A':                SelectAll();                return;            case 'C':                if ( CanCopy() )                    Copy() ;                return;            case 'V':                if ( CanPaste() )                    Paste() ;                return;            case 'X':                if ( CanCut() )                    Cut() ;                return;            default:                break;        }    }    // no, we didn't process it    event.Skip();}

void wxTextCtrl::Paste(){    if (CanPaste())    {        ::SendMessage(GetBuddyHwnd(), WM_PASTE, 0, 0L);    }}

void wxTextEntry::Paste(){    wxCHECK_RET( GetTextPeer(), "Must create the control first" );    if (CanPaste())        GetTextPeer()->Paste() ;}

void wxTextCtrl::Paste(){    if (CanPaste())    {        HWND                        hWnd = GetHwnd();        ::WinSendMsg(hWnd, EM_PASTE, 0, 0);    }} // end of wxTextCtrl::Paste

 bool NativeTextfieldWin::IsCommandIdEnabled(int command_id) const {     switch(command_id)     {     case IDS_APP_UNDO:       return !textfield_->read_only() && !!CanUndo();     case IDS_APP_CUT:        return !textfield_->read_only() &&                                  !textfield_->IsPassword() && !!CanCut();     case IDS_APP_COPY:       return !!CanCopy() && !textfield_->IsPassword();     case IDS_APP_PASTE:      return !textfield_->read_only() && !!CanPaste();     case IDS_APP_SELECT_ALL: return !!CanSelectAll();     default:                 NOTREACHED();         return false;     } }

void CRichEditCtrlX::OnContextMenu(CWnd* pWnd, CPoint point){	long iSelStart, iSelEnd;	GetSel(iSelStart, iSelEnd);	int iTextLen = GetWindowTextLength();	// Context menu of standard edit control	// 	// Undo	// ----	// Cut	// Copy	// Paste	// Delete	// ------	// Select All	bool bReadOnly = (GetStyle() & ES_READONLY);	CMenu menu;	menu.CreatePopupMenu();	if (!bReadOnly){		menu.AppendMenu(MF_STRING, MP_UNDO, GetResString(IDS_UNDO));		menu.AppendMenu(MF_SEPARATOR);	}	if (!bReadOnly)		menu.AppendMenu(MF_STRING, MP_CUT, GetResString(IDS_CUT));	menu.AppendMenu(MF_STRING, MP_COPYSELECTED, GetResString(IDS_COPY));	if (!bReadOnly){		menu.AppendMenu(MF_STRING, MP_PASTE, GetResString(IDS_PASTE));		menu.AppendMenu(MF_STRING, MP_REMOVESELECTED, GetResString(IDS_DELETESELECTED));	}	menu.AppendMenu(MF_SEPARATOR);	menu.AppendMenu(MF_STRING, MP_SELECTALL, GetResString(IDS_SELECTALL));	menu.EnableMenuItem(MP_UNDO, CanUndo() ? MF_ENABLED : MF_GRAYED);	menu.EnableMenuItem(MP_CUT, iSelEnd > iSelStart ? MF_ENABLED : MF_GRAYED);	menu.EnableMenuItem(MP_COPYSELECTED, iSelEnd > iSelStart ? MF_ENABLED : MF_GRAYED);	menu.EnableMenuItem(MP_PASTE, CanPaste() ? MF_ENABLED : MF_GRAYED);	menu.EnableMenuItem(MP_REMOVESELECTED, iSelEnd > iSelStart ? MF_ENABLED : MF_GRAYED);	menu.EnableMenuItem(MP_SELECTALL, iTextLen > 0 ? MF_ENABLED : MF_GRAYED);	if (point.x == -1 && point.y == -1)	{		point.x = 16;		point.y = 32;		ClientToScreen(&point);	}	menu.TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTBUTTON, point.x, point.y, this);}

void wxTextCtrl::Paste(){    if (CanPaste())    {        wxClipboardTextEvent evt(wxEVT_TEXT_PASTE, GetId());        evt.SetEventObject(this);        if (!GetEventHandler()->ProcessEvent(evt))        {            wxTextEntry::Paste();            // TODO: eventually we should add setting the default style again            SendTextUpdatedEvent();        }    }}

///	report clipboard content availability. This function checks whole clipboard ///	content. It may return false if some objects cannot be pasted. i.e. events///	cannot be pasted as children of state machine object///	/param	pParentName - name of object to paste///	/return	true if whole clipboard content cannot be pasted for passed parentbool CStateMachineClipboard::CanPastePartially( IHashString *pParentName ) const{	ASSERT( pParentName != NULL );	if( !CanPaste() )	{		return false;	}	static const DWORD hash_CQHState = CHashString( _T("CQHState") ).GetUniqueID();	if( hash_CQHState != GetComponentType( pParentName ).GetUniqueID() )	{		IXMLArchive *pArchive = GetClipboardDataArchive();		ASSERT( pArchive != NULL );		CStateMachineClipboardPreprocessor preprocessor;		VERIFY( preprocessor.Prepare( pParentName, pArchive ) );		pArchive->Close();		return preprocessor.HasTopLevelEvents();	}	return false;}

void CLeftView::OnContextMenu(CWnd* pWnd, CPoint point) {	char cStr[64];	ZeroMemory( cStr, sizeof(cStr) );	CMenu menu;	CFoulerDoc* pDoc = GetDocument();	ASSERT_VALID(pDoc);	menu.CreatePopupMenu();	CListCtrl& refCtrl = GetListCtrl();	int iCount = refCtrl.GetSelectedCount();	if( iCount > 0 )	{		wsprintf( cStr, "%d items have been selected", iCount );		menu.AppendMenu( MF_STRING, NULL, cStr );		menu.AppendMenu( MF_STRING, ID_EDIT_COPY, "Copy" );	}	if( CanPaste() ) menu.AppendMenu( MF_STRING, ID_EDIT_PASTE, "Paste" );	SetForegroundWindow();	menu.TrackPopupMenu( TPM_LEFTALIGN, point.x, point.y, this, NULL );}

///	/brief	paste objects from clipboard///	/param	pParentName - name of the state machine or single state to paste///	/param	object - list with created objects///	/return	true if objects were pasted from the clipboardbool CStateMachineClipboard::Paste( IHashString *pParentName, vector<ObjectInfo> &objects ) const{	if( !CanPaste() )	{		return false;	}	IXMLArchive *pArchive = GetClipboardDataArchive();	if( pArchive == NULL )	{		return false;	}	if( !IsValidArchive( pArchive ))	{		pArchive->Close();		return false;	}	CStateMachineClipboardPreprocessor preprocessor;	if( !preprocessor.Prepare( pParentName, pArchive ) )	{		pArchive->Close();		return false;	}	IXMLArchive *pTransformedArchive = TransformXMLArchive( pArchive, preprocessor );	if( pTransformedArchive == NULL )	{		pArchive->Close();		return false;	}#ifdef _DEBUG	DumpStream( pTransformedArchive, _T("c://stateMachine.transformed.xml") );#endif	bool res = CreateObjects( pParentName, pTransformedArchive, objects );	pTransformedArchive->Close();	return res;}

void CMuleTextCtrl::OnRightDown( wxMouseEvent& evt ){	// If this control doesn't have focus, then set it	if ( FindFocus() != this )		SetFocus();	wxMenu popup_menu;		popup_menu.Append( CMTCE_Cut, _("Cut") );	popup_menu.Append( CMTCE_Copy, _("Copy") );	popup_menu.Append( CMTCE_Paste, _("Paste") );	popup_menu.Append( CMTCE_Clear, _("Clear") );		popup_menu.AppendSeparator();		popup_menu.Append( CMTCE_SelAll, _("Select All") );	// wxMenu will automatically enable/disable the Cut and Copy items,	// however, were are a little more pricky about the Paste item than they	// are, so we enable/disable it on our own, depending on whenever or not	// there's actually something to paste	bool canpaste = false;	if ( CanPaste() ) {		if ( wxTheClipboard->Open() ) {			if ( wxTheClipboard->IsSupported( wxDF_TEXT ) ) {				wxTextDataObject data;	 			wxTheClipboard->GetData( data );				canpaste = (data.GetTextLength() > 0);			}			wxTheClipboard->Close();		}	}	popup_menu.Enable( CMTCE_Paste,		canpaste );	popup_menu.Enable( CMTCE_Clear,		IsEditable() && !GetValue().IsEmpty() );	PopupMenu( &popup_menu, evt.GetX(), evt.GetY() );}

void CMyRichEdit::OnRButtonDown(UINT nFlags, CPoint point) {	//设置为焦点	SetFocus();	//创建一个弹出式菜单	CMenu popmenu;	popmenu.CreatePopupMenu();	//添加菜单项目	popmenu.AppendMenu(0, ID_RICH_UNDO, _T("撤消(&U)"));	popmenu.AppendMenu(0, MF_SEPARATOR);	popmenu.AppendMenu(0, ID_RICH_CUT, _T("剪切(&T)"));	popmenu.AppendMenu(0, ID_RICH_COPY, _T("复制(&T)"));	popmenu.AppendMenu(0, ID_RICH_PASTE, _T("粘贴(&P)"));	popmenu.AppendMenu(0, ID_RICH_CLEAR, _T("删除(&D)"));	popmenu.AppendMenu(0, MF_SEPARATOR);	popmenu.AppendMenu(0, ID_RICH_SELECTALL, _T("全选(&A)"));	popmenu.AppendMenu(0, MF_SEPARATOR);	popmenu.AppendMenu(0, ID_RICH_SETFONT, _T("设置字体(&F)"));	//初始化菜单项	UINT nUndo=(CanUndo() ? 0 : MF_GRAYED );	popmenu.EnableMenuItem(ID_RICH_UNDO, MF_BYCOMMAND|nUndo);	UINT nSel=((GetSelectionType()!=SEL_EMPTY) ? 0 : MF_GRAYED) ;	popmenu.EnableMenuItem(ID_RICH_CUT, MF_BYCOMMAND|nSel);	popmenu.EnableMenuItem(ID_RICH_COPY, MF_BYCOMMAND|nSel);	popmenu.EnableMenuItem(ID_RICH_CLEAR, MF_BYCOMMAND|nSel);		UINT nPaste=(CanPaste() ? 0 : MF_GRAYED) ;	popmenu.EnableMenuItem(ID_RICH_PASTE, MF_BYCOMMAND|nPaste);	//显示菜单	CPoint pt;	GetCursorPos(&pt);	popmenu.TrackPopupMenu(TPM_RIGHTBUTTON, pt.x, pt.y, this);	popmenu.DestroyMenu();	CRichEditCtrl::OnRButtonDown(nFlags, point);}

void CTWScriptEdit::OnRButtonDown(UINT nFlags, CPoint point) {	//设置为焦点	SetFocus();	//创建一个弹出式菜单	CMenu popmenu;	popmenu.CreatePopupMenu();	//添加菜单项目	popmenu.AppendMenu(0, ID_RICH_UNDO, "&Undo");	popmenu.AppendMenu(0, MF_SEPARATOR);	popmenu.AppendMenu(0, ID_RICH_CUT, "&Cut");	popmenu.AppendMenu(0, ID_RICH_COPY, "C&opy");	popmenu.AppendMenu(0, ID_RICH_PASTE, "&Paste");	popmenu.AppendMenu(0, ID_RICH_CLEAR, "C&lear");	popmenu.AppendMenu(0, MF_SEPARATOR);	popmenu.AppendMenu(0, ID_RICH_SELECTALL, "Select &All");	popmenu.AppendMenu(0, MF_SEPARATOR);	popmenu.AppendMenu(0, ID_RICH_SETFONT, "Select &Font");	//初始化菜单项	UINT nUndo=(CanUndo() ? 0 : MF_GRAYED );	popmenu.EnableMenuItem(ID_RICH_UNDO, MF_BYCOMMAND|nUndo);	UINT nSel=((GetSelectionType()!=SEL_EMPTY) ? 0 : MF_GRAYED) ;	popmenu.EnableMenuItem(ID_RICH_CUT, MF_BYCOMMAND|nSel);	popmenu.EnableMenuItem(ID_RICH_COPY, MF_BYCOMMAND|nSel);	popmenu.EnableMenuItem(ID_RICH_CLEAR, MF_BYCOMMAND|nSel);	UINT nPaste=(CanPaste() ? 0 : MF_GRAYED) ;	popmenu.EnableMenuItem(ID_RICH_PASTE, MF_BYCOMMAND|nPaste);	//显示菜单	CPoint pt;	GetCursorPos(&pt);	popmenu.TrackPopupMenu(TPM_RIGHTBUTTON, pt.x, pt.y, this);	popmenu.DestroyMenu();	CRichEditCtrl::OnRButtonDown(nFlags, point);}

void FB_Frame::OnMenuOpen ( wxMenuEvent& event ){    if ( event.GetMenu() == m_EditMenu )    {        FB_STC * stc = 0;        if( m_Code_areaTab != 0 )            stc = reinterpret_cast<FB_STC *>( m_Code_areaTab->GetCurrentPage() );        #define _ENABLE( id, func ) m_EditMenu->Enable( id, ( stc != 0 ) ? stc -> func : false )            _ENABLE( wxID_UNDO,                 CanUndo() );            _ENABLE( wxID_REDO,                 CanRedo() );            _ENABLE( wxID_COPY,                 HasSelection() );            _ENABLE( wxID_CUT,                  HasSelection() );            _ENABLE( wxID_PASTE,                CanPaste() );            _ENABLE( wxID_SELECTALL,            GetLength() );            _ENABLE( fbideID_SelectLine,        GetLength() );            _ENABLE( fbideID_CommentBlock,      CanComment() );            _ENABLE( fbideID_UncommentBlock,    CanComment() );        #undef _ENABLE        m_EditMenu->Enable(wxID_JUSTIFY_RIGHT,    ( stc ) ? true : false );        m_EditMenu->Enable(wxID_JUSTIFY_LEFT,     ( stc ) ? true : false );    }}

		void Input::Clipboard::OnMenuKeyboard(const Window::Menu::PopupHandler::Param& param)		{			param.menu[IDM_MACHINE_EXT_KEYBOARD_PASTE].Enable( !param.show || CanPaste() );		}

void Edit::OnEditPaste (wxCommandEvent &WXUNUSED(event)) {    if (!CanPaste()) return;    Paste ();}

void wxWebFrame::Paste(){    if (CanPaste())        m_impl->frame->editor()->paste();}

void wxComboBox::OnUpdatePaste(wxUpdateUIEvent& event){    event.Enable( CanPaste() );}

/** Set the state of the items in the main* program menu.*/void Explorerplusplus::SetProgramMenuItemStates(HMENU hProgramMenu){	LONG WindowStyle;	UINT ItemToCheck;	UINT ListViewStyle;	BOOL bVirtualFolder;	UINT uViewMode;	m_pShellBrowser[m_iObjectIndex]->GetCurrentViewMode(&uViewMode);	bVirtualFolder = m_pActiveShellBrowser->InVirtualFolder();	lEnableMenuItem(hProgramMenu,IDM_FILE_COPYITEMPATH,CheckItemSelection());	lEnableMenuItem(hProgramMenu,IDM_FILE_COPYUNIVERSALFILEPATHS,CheckItemSelection());	lEnableMenuItem(hProgramMenu,IDM_FILE_SETFILEATTRIBUTES,CheckItemSelection());	lEnableMenuItem(hProgramMenu,IDM_FILE_OPENCOMMANDPROMPT,!bVirtualFolder);	lEnableMenuItem(hProgramMenu,IDM_FILE_SAVEDIRECTORYLISTING,!bVirtualFolder);	lEnableMenuItem(hProgramMenu,IDM_FILE_COPYCOLUMNTEXT,m_nSelected && (uViewMode == VM_DETAILS));	lEnableMenuItem(hProgramMenu,IDM_FILE_RENAME,IsRenamePossible());	lEnableMenuItem(hProgramMenu,IDM_FILE_DELETE,IsDeletionPossible());	lEnableMenuItem(hProgramMenu,IDM_FILE_DELETEPERMANENTLY,IsDeletionPossible());	lEnableMenuItem(hProgramMenu,IDM_FILE_PROPERTIES,CanShowFileProperties());	lEnableMenuItem(hProgramMenu,IDM_EDIT_UNDO,m_FileActionHandler.CanUndo());	lEnableMenuItem(hProgramMenu,IDM_EDIT_PASTE,CanPaste());	lEnableMenuItem(hProgramMenu,IDM_EDIT_PASTESHORTCUT,CanPaste());	lEnableMenuItem(hProgramMenu,IDM_EDIT_PASTEHARDLINK,CanPaste());	/* The following menu items are only enabled when one	or more files are selected (they represent file	actions, cut/copy, etc). */	/* TODO: Split CanCutOrCopySelection() into two, as some	items may only be copied/cut (not both). */	lEnableMenuItem(hProgramMenu,IDM_EDIT_COPY,CanCutOrCopySelection());	lEnableMenuItem(hProgramMenu,IDM_EDIT_CUT,CanCutOrCopySelection());	lEnableMenuItem(hProgramMenu,IDM_EDIT_COPYTOFOLDER,CanCutOrCopySelection() && GetFocus() != m_hTreeView);	lEnableMenuItem(hProgramMenu,IDM_EDIT_MOVETOFOLDER,CanCutOrCopySelection() && GetFocus() != m_hTreeView);	lEnableMenuItem(hProgramMenu,IDM_EDIT_WILDCARDDESELECT,m_nSelected);	lEnableMenuItem(hProgramMenu,IDM_EDIT_SELECTNONE,m_nSelected);	lEnableMenuItem(hProgramMenu,IDM_EDIT_SHOWFILESLACK,m_nSelected);	lEnableMenuItem(hProgramMenu,IDM_EDIT_RESOLVELINK,m_nSelected);	lCheckMenuItem(hProgramMenu,IDM_VIEW_STATUSBAR,m_bShowStatusBar);	lCheckMenuItem(hProgramMenu,IDM_VIEW_FOLDERS,m_bShowFolders);	lCheckMenuItem(hProgramMenu,IDM_VIEW_DISPLAYWINDOW,m_bShowDisplayWindow);	lCheckMenuItem(hProgramMenu,IDM_TOOLBARS_ADDRESSBAR,m_bShowAddressBar);	lCheckMenuItem(hProgramMenu,IDM_TOOLBARS_MAINTOOLBAR,m_bShowMainToolbar);	lCheckMenuItem(hProgramMenu,IDM_TOOLBARS_BOOKMARKSTOOLBAR,m_bShowBookmarksToolbar);	lCheckMenuItem(hProgramMenu,IDM_TOOLBARS_DRIVES,m_bShowDrivesToolbar);	lCheckMenuItem(hProgramMenu,IDM_TOOLBARS_APPLICATIONTOOLBAR,m_bShowApplicationToolbar);	lCheckMenuItem(hProgramMenu,IDM_TOOLBARS_LOCKTOOLBARS,m_bLockToolbars);	lCheckMenuItem(hProgramMenu,IDM_VIEW_SHOWHIDDENFILES,m_pActiveShellBrowser->QueryShowHidden());	lCheckMenuItem(hProgramMenu,IDM_FILTER_APPLYFILTER,m_pActiveShellBrowser->GetFilterStatus());	lEnableMenuItem(hProgramMenu,IDM_ACTIONS_NEWFOLDER,!bVirtualFolder);	lEnableMenuItem(hProgramMenu,IDM_ACTIONS_SPLITFILE,(m_pActiveShellBrowser->QueryNumSelectedFiles() == 1) && !bVirtualFolder);	lEnableMenuItem(hProgramMenu,IDM_ACTIONS_MERGEFILES,m_nSelected > 1);	lEnableMenuItem(hProgramMenu,IDM_ACTIONS_DESTROYFILES,m_nSelected);	WindowStyle = GetWindowLong(m_hActiveListView,GWL_STYLE);	ListViewStyle = (WindowStyle & LVS_TYPEMASK);	ItemToCheck = GetViewModeMenuId(uViewMode);	CheckMenuRadioItem(hProgramMenu,IDM_VIEW_THUMBNAILS,IDM_VIEW_EXTRALARGEICONS,ItemToCheck,MF_BYCOMMAND);	lEnableMenuItem(hProgramMenu,IDM_FILE_CLOSETAB,TabCtrl_GetItemCount(m_hTabCtrl));	lEnableMenuItem(hProgramMenu,IDM_GO_BACK,m_pActiveShellBrowser->IsBackHistory());	lEnableMenuItem(hProgramMenu,IDM_GO_FORWARD,m_pActiveShellBrowser->IsForwardHistory());	lEnableMenuItem(hProgramMenu,IDM_GO_UPONELEVEL,m_pActiveShellBrowser->CanBrowseUp());	lEnableMenuItem(hProgramMenu,IDM_VIEW_AUTOSIZECOLUMNS,uViewMode == VM_DETAILS);	if(uViewMode == VM_DETAILS)	{		/* Disable auto arrange menu item. */		lEnableMenuItem(hProgramMenu,IDM_ARRANGEICONSBY_AUTOARRANGE,FALSE);		lCheckMenuItem(hProgramMenu,IDM_ARRANGEICONSBY_AUTOARRANGE,FALSE);		lEnableMenuItem(hProgramMenu,IDM_VIEW_GROUPBY,TRUE);	}	else if(uViewMode == VM_LIST)	{		/* Disable group menu item. */		lEnableMenuItem(hProgramMenu,IDM_VIEW_GROUPBY,FALSE);		/* Disable auto arrange menu item. */		lEnableMenuItem(hProgramMenu,IDM_ARRANGEICONSBY_AUTOARRANGE,FALSE);		lCheckMenuItem(hProgramMenu,IDM_ARRANGEICONSBY_AUTOARRANGE,FALSE);	}	else	{		lEnableMenuItem(hProgramMenu,IDM_VIEW_GROUPBY,TRUE);		lEnableMenuItem(hProgramMenu,IDM_ARRANGEICONSBY_AUTOARRANGE,TRUE);		lCheckMenuItem(hProgramMenu,IDM_ARRANGEICONSBY_AUTOARRANGE,m_pActiveShellBrowser->QueryAutoArrange());//.........这里部分代码省略.........

/*---------------------------------------------------------------------------*/void wxSQLEditorBase::OnPasteUpdate(wxUpdateUIEvent& event){   event.Enable(CanPaste());}

void FB_STC::OnPaste ( wxCommandEvent& event ) {    if (!CanPaste()) return;    Paste ();}

void fbtTextFile::pasteEvent(wxCommandEvent& evt){	if (!CanPaste())		return;	Paste();}

static pascal Boolean MyFilter(DialogPtr dlog, EventRecord *evt, short *itemHit)	{		Boolean ans=FALSE,doHilite=FALSE; WindowPtr w;		short type,ch; Handle hndl; Rect box;		static long then; static Point clickPt;		w = (WindowPtr)(evt->message);		switch(evt->what) {			case updateEvt:				if (w == dlog) {					/* Update our dialog contents */					DoDialogUpdate(dlog);					ans = TRUE; *itemHit = 0;					}				 else {					/*					 *	Call your main event loop DoUpdate(w) routine here if you					 *	don't want unsightly holes in background windows caused					 *	by nested alerts, balloon help, or screen savers (see					 *	Tech Note #304).					 */					}				break;			case activateEvt:				if (w == dlog) {					DoDialogActivate(dlog,(evt->modifiers & activeFlag)!=0);					*itemHit = 0;					}				 else {					/*					 *	Call your main event loop DoActivate(w) routine here if					 *	you want to deactivate the former frontmost window, in order					 *	to unhighlight any selection, scroll bars, etc.					 */					}				break;			case mouseDown:			case mouseUp:				where = evt->where;		/* Make info available to DoDialog() */				GlobalToLocal(&where);				modifiers = evt->modifiers;				ans = CheckUserItems(where,itemHit);				break;			case keyDown:				if ((ch=(unsigned char)evt->message)=='/r' || ch==ENTERkey) {					*itemHit = OK_ITEM /* Default Item Number here */;					doHilite = ans = TRUE;					}				 else if (evt->modifiers & cmdKey) {					ch = (unsigned char)evt->message;					switch(ch) {						case 'x':						case 'X':							if (TextSelected(dlog))								{ SystemEdit(3); ZeroScrap(); DialogCut(dlog); TEToScrap(); }							 else {								/* Cut from anything else cuttable, like a list */								}							break;						case 'c':						case 'C':							if (TextSelected(dlog))								{ SystemEdit(3); ZeroScrap(); DialogCopy(dlog); TEToScrap(); }							 else {								/* Copy from anything else copyable, like a list */								}							break;						case 'v':						case 'V':							if (CanPaste(1,'TEXT'))								{ TEFromScrap(); DialogPaste(dlog); }							 else {							 	/* Deal with any other pasteable scraps here */								}							break;						case 'a':						case 'A':							if (((DialogPeek)dlog)->editField >= 0) {								/* Dialog has text edit item: select all */								SelectDialogItemText(dlog,((DialogPeek)dlog)->editField+1,0,32767);								}							 else {								}							*itemHit = 0;							break;						case '.':							*itemHit = CANCEL_ITEM;							doHilite = TRUE;							break;						}					ans = TRUE;		/* Other cmd-chars ignored */					}				break;			}		if (doHilite) {			GetDialogItem(dlog,*itemHit,&type,&hndl,&box);			/* Reality check */			if (type == (btnCtrl+ctrlItem)) {				long soon = TickCount() + 7;		/* Or whatever feels right */				HiliteControl((ControlHandle)hndl,1);//.........这里部分代码省略.........

void CRichEditCtrlX::OnContextMenu(CWnd* /*pWnd*/, CPoint point){	if (point.x != -1 || point.y != -1) {		CRect rcClient;		GetClientRect(&rcClient);		ClientToScreen(&rcClient);		if (!rcClient.PtInRect(point)) {			Default();			return;		}	}	long iSelStart, iSelEnd;	GetSel(iSelStart, iSelEnd);	int iTextLen = GetWindowTextLength();	// Context menu of standard edit control	// 	// Undo	// ----	// Cut	// Copy	// Paste	// Delete	// ------	// Select All	bool bReadOnly = (GetStyle() & ES_READONLY)!=0;	CMenu menu;	menu.CreatePopupMenu();	if (!bReadOnly){		menu.AppendMenu(MF_STRING, MP_UNDO, GetResString(IDS_UNDO));		menu.AppendMenu(MF_SEPARATOR);	}	if (!bReadOnly)		menu.AppendMenu(MF_STRING, MP_CUT, GetResString(IDS_CUT));	menu.AppendMenu(MF_STRING, MP_COPYSELECTED, GetResString(IDS_COPY));	if (!bReadOnly){		menu.AppendMenu(MF_STRING, MP_PASTE, GetResString(IDS_PASTE));		menu.AppendMenu(MF_STRING, MP_REMOVESELECTED, GetResString(IDS_DELETESELECTED));	}	menu.AppendMenu(MF_SEPARATOR);	menu.AppendMenu(MF_STRING, MP_SELECTALL, GetResString(IDS_SELECTALL));	menu.EnableMenuItem(MP_UNDO, CanUndo() ? MF_ENABLED : MF_GRAYED);	menu.EnableMenuItem(MP_CUT, iSelEnd > iSelStart ? MF_ENABLED : MF_GRAYED);	menu.EnableMenuItem(MP_COPYSELECTED, iSelEnd > iSelStart ? MF_ENABLED : MF_GRAYED);	menu.EnableMenuItem(MP_PASTE, CanPaste() ? MF_ENABLED : MF_GRAYED);	menu.EnableMenuItem(MP_REMOVESELECTED, iSelEnd > iSelStart ? MF_ENABLED : MF_GRAYED);	menu.EnableMenuItem(MP_SELECTALL, iTextLen > 0 ? MF_ENABLED : MF_GRAYED);	if (point.x == -1 && point.y == -1)	{		point.x = 16;		point.y = 32;		ClientToScreen(&point);	}	// Cheap workaround for the "Text cursor is showing while context menu is open" glitch. It could be solved properly 	// with the RE's COM interface, but because the according messages are not routed with a unique control ID, it's not 	// really useable (e.g. if there are more RE controls in one window). Would to envelope each RE window to get a unique ID..	m_bForceArrowCursor = true;	menu.TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTBUTTON, point.x, point.y, this);	m_bForceArrowCursor = false;}

void wxTextCtrl::OnUpdatePaste( wxUpdateUIEvent& rEvent ){    rEvent.Enable(CanPaste());} // end of wxTextCtrl::OnUpdatePaste

void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event){    event.Enable( CanPaste() );}

void CLeftView::OnUpdateEditPaste(CCmdUI* pCmdUI) {	pCmdUI->Enable( CanPaste() );}