自学教程：C++ GetFirstSelectedItemPosition函数代码示例

void CSitesWnd::OnSitesDelete() {	fs::list <int> vItems;	POSITION pos = GetFirstSelectedItemPosition ();	if (pos == NULL)		return;	if (IDNO == MessageBox (LS (L_AREYOUSURE), LS (L_CONFIRMATION), MB_YESNO))	{		SetFocus ();		return;	}	SetFocus ();	pos = GetFirstSelectedItemPosition ();	while (pos)	{		int iItem = GetNextSelectedItem (pos);		vItems.add (iItem);	}	if (vItems.size () == 0)		return;	for (int i = vItems.size () - 1; i >= 0; i--)	{		fsSiteInfo *pSite = (fsSiteInfo*) GetItemData (vItems [i]);		_SitesMgr.DeleteSite (pSite);	}}

void CSourceDirListCtrl::RemoveSelectedItems(){	SetRedraw(FALSE);	//Delete all selected items	POSITION pos = GetFirstSelectedItemPosition();		int nItem = -1;	while (pos != NULL)	{		nItem = GetNextSelectedItem(pos);		DeleteItem(nItem);				//Delete the previous one item will affect the pos		pos = GetFirstSelectedItemPosition();	}	if(GetItemCount() <= 0)	{		SetHeaderCheckedState(0, CL_UNCHECKED);	}	SetRedraw(TRUE);	UpdateWindow();}

void CServerListCtrl::DeleteSelectedServers(){	//SetRedraw(FALSE);	while (GetFirstSelectedItemPosition() != NULL)	{		POSITION pos = GetFirstSelectedItemPosition();		int iItem = GetNextSelectedItem(pos);		theApp.serverlist->RemoveServer((CServer*)GetItemData(iItem));		DeleteItem(iItem);	}	ShowServerCount();	//SetRedraw(TRUE);	SetFocus();	AutoSelectItem();}

void CFVDownloads_Tasks::CallSelectedDownload(BOOL bPropertiesInsteadOfPass){	POSITION pos = GetFirstSelectedItemPosition ();	if (pos == NULL)		return;	vmsDownloadSmartPtr dld = m_vDlds [GetNextSelectedItem (pos)];	if (pos == NULL && dld->pMgr->IsDone ())	{		OnFvdldLaunch ();	}	else if (pos == NULL && dld->pMgr->IsRunning () && _App.DownloadDialog_Use ())	{		if (dld->pdlg)		{			dld->pdlg->BringWindowToTop ();			dld->pdlg->SetFocus ();		}		else		{			dld->AddRef ();			_pwndDownloads->PostMessage (WM_DW_CREATEDLDDIALOG, 1, (LPARAM)(fsDownload*)dld);		}	}	else	{		if (bPropertiesInsteadOfPass)			ShowSelectedDldsProperties ();		else			OnFvdldPasstodlds ();	}}

void CSitesWnd::UpdateMenu(CMenu *pMenu){	int cSelected = GetSelectedCount ();	if (cSelected == 0)	{		pMenu->EnableMenuItem (ID_SITES_DELETE, MF_BYCOMMAND | MF_GRAYED);		pMenu->EnableMenuItem (ID_SITES_TEMPRORARY, MF_BYCOMMAND | MF_GRAYED);	}	else	{		POSITION pos = GetFirstSelectedItemPosition ();		m_bSelectedIsTemp = TRUE;		while (pos)		{			int iItem = GetNextSelectedItem (pos);			fsSiteInfo *pSite = (fsSiteInfo*) GetItemData (iItem);			if (pSite->bTemp == FALSE)			{				m_bSelectedIsTemp = FALSE;				break;			}		}		if (m_bSelectedIsTemp)			pMenu->CheckMenuItem (ID_SITES_TEMPRORARY, MF_BYCOMMAND | MF_CHECKED);	}	if (cSelected != 1)		pMenu->EnableMenuItem (ID_SITES_PROPERTIES, MF_BYCOMMAND | MF_GRAYED);	pMenu->SetDefaultItem (ID_SITES_PROPERTIES);}

void CDownloads_Deleted::OnDeletedDelete(){	DLDS_LIST v;	POSITION pos = GetFirstSelectedItemPosition ();	while (pos)	{		int iItem = GetNextSelectedItem (pos);		vmsDownloadSmartPtr dld = (fsDownload*) GetItemData (iItem);		v.push_back (dld);	}	if (v.size ())	{		if (IDYES == MessageBox (LS (L_AREYOUSURE), LS (L_CONFIRMATION), MB_ICONQUESTION | MB_YESNO))		{			if (_pwndDownloads->Get_DWWN () == DWWN_DELETED)				_pwndDownloads->m_wndDeleted.ShowWindow (SW_HIDE);			try {				_DldsMgr.DeleteDeletedDownloads (v);			}			catch (...) {}			if (_pwndDownloads->Get_DWWN () == DWWN_DELETED)				_pwndDownloads->m_wndDeleted.ShowWindow (SW_SHOW);		}	}}

int SeriesListCtrl::HitTest(){	int ret=-1;	POSITION pos=GetFirstSelectedItemPosition(); 	if(pos) ret=GetItemData(GetNextSelectedItem(pos));	return ret;}

void FolderListCtrl::OnChar(UINT chr, UINT rep_cnt, UINT flags){	if (chr >= '0' && chr <= '9' || chr >= 'A' && chr <= 'Z' ||		chr >= 'a' && chr <= 'z' || chr >= 0x100)	{		bool begin= search_string_.empty();		search_string_ += static_cast<TCHAR>(chr);		POSITION pos= GetFirstSelectedItemPosition();		int item= GetNextSelectedItem(pos);		int found= FindItem(search_string_, item);		if (found < 0 && begin)			found = FindItem(search_string_, -1);		if (found >= 0)		{			UINT state= LVIS_SELECTED | LVIS_FOCUSED;			SetItemState(found, state, state);		}		else		{			//TODO:			// msg beep here to signal no match...		}		timer_ = SetTimer(1, 1000, 0);	}	else		Default();}

int CFileBrowserListCtrl::GetFirstSelectedItem() const{	POSITION	pos = GetFirstSelectedItemPosition();	if (pos != NULL)		return(GetNextSelectedItem(pos));	return(-1);	// no selection}

void CHostList::OnCommander(){	POSITION pos = GetFirstSelectedItemPosition();	int index = GetNextSelectedItem(pos);	if (pos < 0)		return;	CLIENT_INFO* info;	info = (CLIENT_INFO*)GetItemData(index);	CCmdDlg *dlg = NULL;	if (m_FuncMap[info->clientid].cmd == NULL)	{		dlg = new CCmdDlg();		dlg->InitModule(info->clientid);		dlg->Create(IDD_DIALOG_CMD);		m_FuncMap[info->clientid].cmd = dlg;	}	else	{		dlg = m_FuncMap[info->clientid].cmd;	}	dlg->ShowWindow(TRUE);}

int CListCtrlEx::GetSelectedItem(){   // check new item and set its icon as the app icon   POSITION p = GetFirstSelectedItemPosition();   int nSelected = GetNextSelectedItem(p);   return nSelected;}

void SeriesListCtrl::OnDeleteSeries(){	POSITION pos=GetFirstSelectedItemPosition(); bool upd=false; void *x;	if(pos)	{		CArray<int,const int&> ToDel; int i; CString temp; 		while(pos) ToDel.Add(GetItemData(GetNextSelectedItem(pos)));		qsort(ToDel.GetData(),ToDel.GetSize(),sizeof(int),compfunc);		for(i=0;i<ToDel.GetSize();i++)		{			int n=ToDel[i];						temp.Format("Series %s contains %d points. Remove it?",Items[n].Name,Items[n].Size);			if(AfxMessageBox(temp,MB_YESNO)==IDNO) ToDel[i]=-1;				}				if((x=Series->GainAcsess(WRITE))!=0)		{			upd=true;			SeriesProtector Protector(x); TSeriesArray& Series(Protector);			{				for(i=0;i<ToDel.GetSize();i++)					if(ToDel[i]>=0) Series.DeleteItem(ToDel[i]);			}		}		if(upd) UpdateSeriesList();	}		}

void KGListCtrl::OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags){	int nResult  = false;	int nRetCode = false;	POSITION pos = GetFirstSelectedItemPosition();	int nItem    = GetNextSelectedItem(pos);		POINT  point;	CPoint HitPoint;	KG_PROCESS_ERROR(nItem != -1);	::GetCursorPos(&point);	::ScreenToClient(this->m_hWnd, &point);	HitPoint.x = point.x;	HitPoint.y = point.y;	DWORD dwData = MAKELONG(point.x, point.y);	if (nChar == 'C' && (GetAsyncKeyState(VK_CONTROL) & 0x8000))	{	}	else if (nChar == 'V' && (GetAsyncKeyState(VK_CONTROL) & 0x8000))	{	}	else if (nChar == VK_RETURN)	{		//OnLButtonDblClk(nFlags, HitPoint);		//GetParent()->SendMessage(WM_LBUTTONDBLCLK, MK_LBUTTON, dwData);	}	else if (nChar == VK_DELETE)	{	}	nResult = true;Exit0:	return;}

void CGitProgressList::OnLvnBegindragSvnprogress(NMHDR* , LRESULT *pResult){	//LPNMLISTVIEW pNMLV = reinterpret_cast<LPNMLISTVIEW>(pNMHDR);#if 0	int selIndex = GetSelectionMark();	if (selIndex < 0)		return;	CDropFiles dropFiles; // class for creating DROPFILES struct	int index;	POSITION pos = GetFirstSelectedItemPosition();	while ( (index = GetNextSelectedItem(pos)) >= 0 )	{		NotificationData * data = m_arData[index];		if ( data->kind==svn_node_file || data->kind==svn_node_dir )		{			CString sPath = GetPathFromColumnText(data->sPathColumnText);			dropFiles.AddFile( sPath );		}	}	if (!dropFiles.IsEmpty())	{		dropFiles.CreateStructure();	}#endif	*pResult = 0;}

void CDownloads_History::OnHstitemDelete(){	POSITION pos = GetFirstSelectedItemPosition ();	fs::list <fsDLHistoryRecord*> v;	while (pos)	{		int i = GetNextSelectedItem (pos);		v.add ((fsDLHistoryRecord*) GetItemData (i));	}	if (IDCANCEL == MessageBox (LS (L_ISOKTODELETE), LS (L_CONFIRMATION),			MB_ICONQUESTION | MB_OKCANCEL))	{		SetFocus ();		return;	}	ShowWindow (SW_HIDE);	try {	for (int i = 0; i < v.size (); i++)		_DldsMgr.m_histmgr.DeleteRecord (v [i]);	}catch (...) {}	ShowWindow (SW_SHOW);	SetFocus ();}

////	[protected handler] ODBCGridCtrl::OnUpdateDelete//void ODBCGridCtrl::OnUpdateDelete(CCmdUI* pCmdUI)	{	POSITION	pos		= GetFirstSelectedItemPosition();	int			nIndex  = pos ? GetNextSelectedItem(pos) : -1;	pCmdUI->Enable( (nIndex > -1) ? TRUE : FALSE );	}

void CQListCtrl::RemoveAllSelection(){	POSITION pos = GetFirstSelectedItemPosition();	while (pos)	{		SetSelection(GetNextSelectedItem(pos), FALSE);	}}

void CFileBrowserListCtrl::GetSelection(CDWordArray& SelIdx) const{	int	selcnt = GetSelectedCount();	SelIdx.SetSize(selcnt);	POSITION	pos = GetFirstSelectedItemPosition();	for (int i = 0; i < selcnt; i++)		SelIdx[i] = GetNextSelectedItem(pos);}

void CMyListCtrl::OnLButtonDblClk(UINT nFlags, CPoint point){    POSITION pos = GetFirstSelectedItemPosition();    if (pos)    {        SendText(GetNextSelectedItem(pos));    }    CListCtrl::OnLButtonDblClk(nFlags, point);}

// 取得当前选择的indexint CFeedIcoItemListCtrl::GetCurrSelectIndex(){	POSITION pos = GetFirstSelectedItemPosition();	if ( pos != NULL )	{		return  GetNextSelectedItem(pos);	}	return -1;}

void SeriesListCtrl::OnSeriesmenuShowvalues(){	POSITION pos=GetFirstSelectedItemPosition(); int n; BOOL show=FALSE;	SeriesValuesDialog SeriesValues1;	if(pos)	{		SeriesValues1.Series=Series; SeriesValues1.graph_num=n=GetItemData(GetNextSelectedItem(pos));		SeriesValues1.DoModal();			}}