OpenFileDlg.cpp from guliverkli at Krugle

Show OpenFileDlg.cpp syntax highlighted

/* 
 *	Copyright (C) 2003-2006 Gabest
 *	http://www.gabest.org
 *
 *  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, 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 GNU Make; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 
 *  http://www.gnu.org/copyleft/gpl.html
 *
 */

// OpenFileDlg.cpp : implementation file
//

#include "stdafx.h"
#include <shlobj.h>
#include <dlgs.h>
#include "OpenFileDlg.h"

#define __DUMMY__ _T("*.*")

bool COpenFileDlg::m_fAllowDirSelection = false;
WNDPROC COpenFileDlg::m_wndProc = NULL;

// COpenFileDlg

IMPLEMENT_DYNAMIC(COpenFileDlg, CFileDialog)
COpenFileDlg::COpenFileDlg(CAtlArray<CString>& mask, bool fAllowDirSelection, LPCTSTR lpszDefExt, LPCTSTR lpszFileName,
		DWORD dwFlags, LPCTSTR lpszFilter, CWnd* pParentWnd)
	: CFileDialog(TRUE, lpszDefExt, lpszFileName, dwFlags|OFN_NOVALIDATE, lpszFilter, pParentWnd, 0)
	, m_mask(mask)
{
	m_fAllowDirSelection = fAllowDirSelection;
	m_pOFN->lpstrInitialDir = lpszFileName;

	m_buff = new TCHAR[10000];
	m_buff[0] = 0;
	m_pOFN->lpstrFile = m_buff;
	m_pOFN->nMaxFile = 10000;
}

COpenFileDlg::~COpenFileDlg()
{
	delete [] m_buff;
}

BEGIN_MESSAGE_MAP(COpenFileDlg, CFileDialog)
	ON_WM_DESTROY()
END_MESSAGE_MAP()


// COpenFileDlg message handlers

LRESULT CALLBACK COpenFileDlg::WindowProcNew(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	if(message ==  WM_COMMAND && HIWORD(wParam) == BN_CLICKED && LOWORD(wParam) == IDOK
	&& m_fAllowDirSelection)
	{
		CAutoVectorPtr<TCHAR> path;
		path.Allocate(MAX_PATH+1); // MAX_PATH should be bigger for multiple selection, but we are only interested if it's zero length
		// note: allocating MAX_PATH only will cause a buffer overrun for too long strings, and will result in a silent app disappearing crash, 100% reproducable
		if(::GetDlgItemText(hwnd, cmb13, (TCHAR*)path, MAX_PATH) == 0)
			::SendMessage(hwnd, CDM_SETCONTROLTEXT, edt1, (LPARAM)__DUMMY__);
	}

	return CallWindowProc(COpenFileDlg::m_wndProc, hwnd, message, wParam, lParam);
}

BOOL COpenFileDlg::OnInitDialog()
{
	CFileDialog::OnInitDialog();

	m_wndProc = (WNDPROC)SetWindowLong(GetParent()->m_hWnd, GWL_WNDPROC, (LONG)WindowProcNew);

	return TRUE;  // return TRUE unless you set the focus to a control
	// EXCEPTION: OCX Property Pages should return FALSE
}

void COpenFileDlg::OnDestroy()
{
	int i = GetPathName().Find(__DUMMY__);
	if(i >= 0) m_pOFN->lpstrFile[i] = m_pOFN->lpstrFile[i+1] = 0;

	CFileDialog::OnDestroy();
}

BOOL COpenFileDlg::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult)
{
	ASSERT(pResult != NULL);

	OFNOTIFY* pNotify = (OFNOTIFY*)lParam;
	// allow message map to override
	if (__super::OnNotify(wParam, lParam, pResult))
	{
		ASSERT(pNotify->hdr.code != CDN_INCLUDEITEM);
		return TRUE;
	}

	switch(pNotify->hdr.code)
	{
	case CDN_INCLUDEITEM:
		if(OnIncludeItem((OFNOTIFYEX*)lParam, pResult))
			return TRUE;
		break;
	}

	return FALSE;   // not handled
}

BOOL COpenFileDlg::OnIncludeItem(OFNOTIFYEX* pOFNEx, LRESULT* pResult)
{
	TCHAR buff[MAX_PATH];
	if(!SHGetPathFromIDList((LPCITEMIDLIST)pOFNEx->pidl, buff)) 
	{
		STRRET s;
		HRESULT hr = ((IShellFolder*)pOFNEx->psf)->GetDisplayNameOf((LPCITEMIDLIST)pOFNEx->pidl, SHGDN_NORMAL|SHGDN_FORPARSING, &s);
		if(S_OK != hr) return FALSE;
		switch(s.uType)
		{
		case STRRET_CSTR: _tcscpy(buff, CString(s.cStr)); break;
		case STRRET_WSTR: _tcscpy(buff, CString(s.pOleStr)); CoTaskMemFree(s.pOleStr); break;
		default: return FALSE;
		}
	}

	CString fn(buff);
/*
	WIN32_FILE_ATTRIBUTE_DATA fad;
	if(GetFileAttributesEx(fn, GetFileExInfoStandard, &fad)
	&& (fad.dwFileAttributes&FILE_ATTRIBUTE_DIRECTORY))
		return FALSE;
*/
	int i = fn.ReverseFind('.'), j = fn.ReverseFind('\\');
	if(i < 0 || i < j) 
		return FALSE;

	CString mask = m_mask[pOFNEx->lpOFN->nFilterIndex-1] + _T(";");
	CString ext = fn.Mid(i).MakeLower() + _T(";");

	*pResult = mask.Find(ext) >= 0 || mask.Find(_T("*.*")) >= 0;

	return TRUE;
}
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