www.pudn.com > eMule0.42e-Sources.zip > ComboBoxEx2.cpp

//this file is part of eMule 
//Copyright (C)2002 Merkur ( merkur-@users.sourceforge.net / http://www.emule-project.net ) 
// 
//This program is free software; you can redistribute it and/or 
//modify it under the terms of the GNU General Public License 
//as published by the Free Software Foundation; either 
//version 2 of the License, or (at your option) any later version. 
// 
//This program is distributed in the hope that it will be useful, 
//but WITHOUT ANY WARRANTY; without even the implied warranty of 
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
//GNU General Public License for more details. 
// 
//You should have received a copy of the GNU General Public License 
//along with this program; if not, write to the Free Software 
//Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 
#include "stdafx.h" 
#include "ComboBoxEx2.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
 
/////////////////////////////////////////////////////////////////////////////// 
// CComboBoxEx2 
 
IMPLEMENT_DYNAMIC(CComboBoxEx2, CComboBoxEx) 
 
BEGIN_MESSAGE_MAP(CComboBoxEx2, CComboBoxEx) 
END_MESSAGE_MAP() 
 
CComboBoxEx2::CComboBoxEx2() 
{ 
} 
 
CComboBoxEx2::~CComboBoxEx2() 
{ 
} 
 
int CComboBoxEx2::AddItem(LPCTSTR pszText, int iImage) 
{ 
	COMBOBOXEXITEM cbi = {0}; 
	cbi.mask = CBEIF_TEXT; 
	cbi.iItem = -1; 
	cbi.pszText = (LPTSTR)pszText; 
	if (iImage != -1) 
	{ 
		cbi.mask |= CBEIF_IMAGE | CBEIF_SELECTEDIMAGE; 
		cbi.iImage = iImage; 
		cbi.iSelectedImage = iImage; 
	} 
	return InsertItem(&cbi); 
} 
 
BOOL CComboBoxEx2::PreTranslateMessage(MSG* pMsg) 
{ 
	// there seems to be no way that we get the WM_CHARTOITEM for this control 
	ASSERT( pMsg->message != WM_CHARTOITEM ); 
 
	if (pMsg->message == WM_KEYDOWN) 
	{ 
		UINT uChar = MapVirtualKey(pMsg->wParam, 2); 
		if (uChar != 0) 
		{ 
			// CComboBox::SelectString seems also not to work 
			CComboBox* pctrlCB = GetComboBoxCtrl(); 
			if (pctrlCB != NULL) 
			{ 
				int iCount = pctrlCB->GetCount(); 
				for (int i = 0; i < iCount; i++) 
				{ 
					CString strItem; 
					pctrlCB->GetLBText(i, strItem); 
					if (strItem.IsEmpty()) 
						continue; 
 
					//those casts are indeed all(!) needed to get that thing (at least!) running correctly for ANSI code pages, 
					//if that will also work for MBCS code pages has to be tested.. 
					UINT uFirstChar      = (UINT)(_TUCHAR)strItem[0]; 
					UINT uFirstCharLower = (UINT)(_TUCHAR)_totlower(uFirstChar); 
					UINT uTheChar        = (UINT)(_TUCHAR)_totlower((UINT)uChar); 
					if (uFirstCharLower == uTheChar){ 
						SetCurSel(i); 
						GetParent()->SendMessage(WM_COMMAND, MAKELONG((WORD)GetWindowLong(m_hWnd, GWL_ID), CBN_SELCHANGE), (LPARAM)m_hWnd); 
						return TRUE; 
					} 
				} 
			} 
		} 
	} 
	return CComboBoxEx::PreTranslateMessage(pMsg); 
} 
 
void UpdateHorzExtent(CComboBox &rctlComboBox, int iIconWidth) 
{ 
	int iItemCount = rctlComboBox.GetCount(); 
	if (iItemCount > 0) 
	{ 
		CDC *pDC = rctlComboBox.GetDC(); 
		if (pDC != NULL) 
		{ 
			// *** To get *ACCURATE* results from 'GetOutputTextExtent' one *MUST* 
			// *** explicitly set the font! 
			CFont *pOldFont = pDC->SelectObject(rctlComboBox.GetFont()); 
 
			CString strItem; 
			int iMaxWidth = 0; 
			for (int i = 0; i < iItemCount; i++) 
			{ 
				rctlComboBox.GetLBText(i, strItem); 
				int iItemWidth = pDC->GetOutputTextExtent(strItem, strItem.GetLength()).cx; 
				if (iItemWidth > iMaxWidth) 
					iMaxWidth = iItemWidth; 
			} 
			 
			pDC->SelectObject(pOldFont); 
			rctlComboBox.ReleaseDC(pDC); 
 
			// Depending on the string (lot of "M" or lot of "i") sometime the 
			// width is just a few pixels too small! 
			iMaxWidth += 4; 
			if (iIconWidth) 
				iMaxWidth += 2 + iIconWidth + 2; 
			rctlComboBox.SetHorizontalExtent(iMaxWidth); 
			if (rctlComboBox.GetDroppedWidth() < iMaxWidth) 
				rctlComboBox.SetDroppedWidth(iMaxWidth); 
		} 
	} 
	else 
		rctlComboBox.SetHorizontalExtent(0); 
} 
 
HWND GetComboBoxEditCtrl(CComboBox& cb) 
{ 
	CWnd* pWnd = cb.GetWindow(GW_CHILD); 
	while (pWnd) 
	{ 
		TCHAR szClassName[MAX_PATH]; 
		if (::GetClassName(*pWnd, szClassName, ARRSIZE(szClassName))) 
		{ 
			if (_tcsicmp(szClassName, _T("EDIT")) == 0) 
				return pWnd->m_hWnd; 
		} 
		pWnd = pWnd->GetNextWindow(); 
	} 
	return NULL; 
}