www.pudn.com > ecc-0.3.16-src.zip > eccBrowseForDirectory.cpp

/* ========================================================================== 
 
	ecc - Erik's Code Collection 
	Copyright (C) 2003-2005 - Erik Dienske 
 
	This file is part of ecc. 
 
	ecc 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. 
 
	ecc 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 ecc; if not, write to the Free Software Foundation, Inc., 
	59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
 
===========================================================================*/ 
 
//--------------------------------------------------------------------------- 
#include  
#pragma hdrstop 
 
#include "eccBrowseForDirectory.h" 
#include 	// Requires global Conditional Define: NO_WIN32_LEAN_AND_MEAN 
//--------------------------------------------------------------------------- 
 
//=========================================================================== 
namespace ecc { 
//=========================================================================== 
 
// === Some Declarations: === 
 
static int __stdcall eccBrowseCallbackProc(HWND hwnd, UINT uMsg, LPARAM lParam, LPARAM lpData); 
/*	Internal function - do not call directly. 
	Sets initial directory for SHBrowseForFolder (in EccBrowseForDirectory). */ 
 
static String FBfdSelectedDirectory; 
/*	Required to communicate with EccBrowseCallbackProc(): */ 
 
//=========================================================================== 
 
bool TBrowseForDirectory::Execute() 
{ 
	// Make directory available for eccBrowseCallbackProc(): 
	FBfdSelectedDirectory = Directory; 
 
	// Create and clear BROWSEINFO object: 
	BROWSEINFO BrowsingInfo; 
	memset(&BrowsingInfo, 0, sizeof(BROWSEINFO)); 
	char dir[MAX_PATH]; 
 
	BrowsingInfo.hwndOwner      = Handle; 
	BrowsingInfo.pszDisplayName = dir; 
	BrowsingInfo.ulFlags        = FFlags; 
	BrowsingInfo.lpszTitle      = Title.c_str(); 
	BrowsingInfo.lpfn           = eccBrowseCallbackProc; 
 
	// Do the browsing, BIF_NEWDIALOGSTYLE (part of BIF_USENEWUI) requires Ole(Un)Initialize: 
	if (FFlags & BIF_NEWDIALOGSTYLE) 
		OleInitialize(NULL); 
	else 
		CoInitializeEx(NULL, COINIT_APARTMENTTHREADED); 
	LPITEMIDLIST pidl = SHBrowseForFolder(&BrowsingInfo); 
	if (FFlags & BIF_NEWDIALOGSTYLE) 
		OleUninitialize(); 
	else 
		CoUninitialize(); 
 
	// Retrieve selected folder: 
	if (pidl) 
	{ 
		char path[MAX_PATH] = ""; 
		SHGetPathFromIDList(pidl, path); 
		Directory = IncludeTrailingBackslash(path); 
		return true; 
	} 
	else // Cancel is pressed: 
	{ 
		Directory = ""; 
		return false; 
	} 
} 
//--------------------------------------------------------------------------- 
 
void TBrowseForDirectory::SetUseNewUI(bool use_new_ui) 
{ 
//	From shlobj.h:	BIF_USENEWUI = (BIF_NEWDIALOGSTYLE | BIF_EDITBOX) 
 
	if (use_new_ui) 
	{ 
		FFlags |= BIF_USENEWUI; 
		FFlags &= ~BIF_STATUSTEXT; 
	} 
	else 
	{ 
		FFlags &= ~BIF_USENEWUI; 
		FFlags |= BIF_STATUSTEXT; 
	} 
} 
//--------------------------------------------------------------------------- 
 
int __stdcall eccBrowseCallbackProc(HWND hwnd, UINT uMsg, LPARAM lParam, LPARAM lpData) 
{ 
	switch (uMsg) 
	{ 
		case BFFM_INITIALIZED: 
			if (!FBfdSelectedDirectory.IsEmpty()) 
				SendMessage(hwnd, BFFM_SETSELECTION, TRUE, (LPARAM)FBfdSelectedDirectory.c_str() ); 
			break; 
 
		case BFFM_SELCHANGED: 
			// Set the status window to the currently selected path. 
			// Does not work with BIF_NEWDIALOGSTYLE. 
			char szDir[MAX_PATH]; 
			if (SHGetPathFromIDList((LPITEMIDLIST) lParam , szDir)) 
				SendMessage(hwnd, BFFM_SETSTATUSTEXT, 0, (LPARAM)szDir); 
			break; 
 
/*	Following only occurs when FFlags contains BIF_VALIDATE. 
		case BFFM_VALIDATEFAILED: 
			ShowMessage( String(szDir) +" does not exist."); 
			break; */ 
 
		default: 
			break; 
	} 
 
	return 0; 
} 
//--------------------------------------------------------------------------- 
 
//=========================================================================== 
} // namespace ecc; 
//===========================================================================