path: root/Source/MFCDialog/PathDialog.cpp

//////////////////////////////////////////////////////////////////////////
//PathDialog.h file
//
//Written by Nguyen Tan Hung <tanhung@yahoo.com>
//////////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "PathDialog.h"
#include <io.h>

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

#define IDC_FOLDERTREE		0x3741
#define IDC_TITLE			0x3742
#define IDC_STATUSTEXT		0x3743

#define IDC_NEW_EDIT_PATH	0x3744

// Class CDlgWnd
BEGIN_MESSAGE_MAP(CPathDialogSub, CWnd)
  ON_BN_CLICKED(IDOK, OnOK)
  ON_EN_CHANGE(IDC_NEW_EDIT_PATH, OnChangeEditPath)
  END_MESSAGE_MAP()

  void CPathDialogSub::OnOK()
{
  ::GetWindowText(::GetDlgItem(m_hWnd, IDC_NEW_EDIT_PATH),
                  m_pPathDialog->m_szPathName, MAX_PATH);

  if(CPathDialog::MakeSurePathExists(m_pPathDialog->m_szPathName)==0)
    {
    m_pPathDialog->m_bGetSuccess=TRUE;
    ::EndDialog(m_pPathDialog->m_hWnd, IDOK);
    }
  else
    {
    ::SetFocus(::GetDlgItem(m_hWnd, IDC_NEW_EDIT_PATH));
    }
}

void CPathDialogSub::OnChangeEditPath()
{
  ::GetWindowText(::GetDlgItem(m_hWnd, IDC_NEW_EDIT_PATH),
                  m_pPathDialog->m_szPathName, MAX_PATH);
  BOOL bEnableOKButton = (_tcslen(m_pPathDialog->m_szPathName)>0);
  SendMessage(BFFM_ENABLEOK, 0, bEnableOKButton);
}
/////////////////////////////////////////////////////////////////////////////
// CPathDialog dialog


CPathDialog::CPathDialog(LPCTSTR lpszCaption, 
                         LPCTSTR lpszTitle, 
                         LPCTSTR lpszInitialPath, 
                         CWnd* pParent)
{
  m_hWnd=NULL;
  m_PathDialogSub.m_pPathDialog= this;
  m_bParentDisabled = FALSE;

  // Get the true parent of the dialog
  m_pParentWnd = CWnd::GetSafeOwner(pParent);

  m_lpszCaption = lpszCaption;
  m_lpszInitialPath = lpszInitialPath;

  memset(&m_bi, 0, sizeof(BROWSEINFO) );
  m_bi.hwndOwner = (m_pParentWnd==NULL)?NULL:m_pParentWnd->GetSafeHwnd();
  m_bi.pszDisplayName = 0;
  m_bi.pidlRoot = 0;
  m_bi.ulFlags = BIF_RETURNONLYFSDIRS | BIF_STATUSTEXT;
  m_bi.lpfn = BrowseCallbackProc;
  m_bi.lpszTitle = lpszTitle;
}


/////////////////////////////////////////////////////////////////////////////
// CPathDialog message handlers

CString CPathDialog::GetPathName()
{
  return CString(m_szPathName);
}

int CALLBACK CPathDialog::BrowseCallbackProc(HWND hwnd,UINT uMsg,LPARAM lParam, LPARAM pData) 
{
  CPathDialog* pDlg = (CPathDialog*)pData;

  switch(uMsg) 
    {
    case BFFM_INITIALIZED: 
    {
    RECT rc;
    HWND hEdit;
    HFONT hFont;

    pDlg->m_hWnd = hwnd;

    if(pDlg->m_lpszCaption!=NULL)
      {
      ::SetWindowText(hwnd, pDlg->m_lpszCaption);
      }

    VERIFY(pDlg->m_PathDialogSub.SubclassWindow(hwnd));
    ::ShowWindow(::GetDlgItem(hwnd, IDC_STATUSTEXT), SW_HIDE);
    ::GetWindowRect(::GetDlgItem(hwnd, IDC_FOLDERTREE), &rc);
    rc.bottom = rc.top - 4;
    rc.top = rc.bottom - 23;
    ::ScreenToClient(hwnd, (LPPOINT)&rc);
    ::ScreenToClient(hwnd, ((LPPOINT)&rc)+1);
    hEdit = ::CreateWindowEx(WS_EX_CLIENTEDGE, _T("EDIT"), _T(""),
                             WS_CHILD|WS_TABSTOP|WS_VISIBLE|ES_AUTOHSCROLL,
                             rc.left, rc.top, 
                             rc.right-rc.left, rc.bottom-rc.top, 
                             hwnd, NULL, NULL, NULL);
    ::SetWindowLong(hEdit, GWL_ID, IDC_NEW_EDIT_PATH);
    ::ShowWindow(hEdit, SW_SHOW);

    hFont = (HFONT)::SendMessage(hwnd, WM_GETFONT, 0, 0);
    ::SendMessage(hEdit, WM_SETFONT, (WPARAM)hFont, MAKELPARAM(TRUE, 0));

    LPCTSTR lpszPath = pDlg->m_lpszInitialPath;
    TCHAR szTemp[MAX_PATH];
    if(lpszPath==NULL)
      {
      ::GetCurrentDirectory(MAX_PATH, szTemp );
      lpszPath = szTemp;
      }
    // WParam is TRUE since you are passing a path.
    // It would be FALSE if you were passing a pidl.
    ::SendMessage(hwnd,BFFM_SETSELECTION,TRUE,
                  (LPARAM)lpszPath);
    break;
    }
    case BFFM_SELCHANGED:
    {
    char szSelection[MAX_PATH];
    if(!::SHGetPathFromIDList((LPITEMIDLIST)lParam, szSelection) ||
       (szSelection[1] !=':' && szSelection[1] != '\\'))
      {
      szSelection[0] = '\0';
      ::SendMessage(hwnd, BFFM_ENABLEOK, 0, FALSE);
      }
    else
      {
      ::SendMessage(hwnd, BFFM_ENABLEOK, 0, TRUE);
      }
    ::SendMessage(hwnd,BFFM_SETSTATUSTEXT,0,(LPARAM)szSelection);
    ::SetWindowText(::GetDlgItem(hwnd, IDC_NEW_EDIT_PATH), szSelection);
    break;
    }
    default:
      break;
    }
  return 0;
}



int CPathDialog::DoModal() 
{

  /////////////////////////////////////////////////////////
  TCHAR szPathTemp[MAX_PATH];
  m_bi.lpfn = BrowseCallbackProc;  // address of callback function
  m_bi.lParam = (LPARAM)this;      // pass address of object to callback function
  m_bi.pszDisplayName = szPathTemp;

  LPITEMIDLIST pidl;
  LPMALLOC pMalloc;

  int iResult=-1;
  if(SUCCEEDED(SHGetMalloc(&pMalloc)))
    {
    m_bGetSuccess = FALSE;
    pidl = SHBrowseForFolder(&m_bi);
    if (pidl!=NULL) 
      {
      //not need do this because OnOK function did
      //bSucceeded = SHGetPathFromIDList(pidl, m_szPathName);
      // In C++: 
      pMalloc->Free(pidl);
      //In C:
      //pMalloc->lpVtbl->Free(pMalloc,pidl);
      //pMalloc->lpVtbl->Release(pMalloc);
      }
    if(m_bGetSuccess)
      {
      iResult = IDOK;
      }
    pMalloc->Release();
    }

  if(m_bParentDisabled && (m_pParentWnd!=NULL))
    {
    m_pParentWnd->EnableWindow(TRUE);
    }
  m_bParentDisabled=FALSE;

  return iResult;
}

BOOL CPathDialog::IsFileNameValid(LPCTSTR lpFileName)
{
  return TRUE;
}

const TCHAR c_FolderDoesNotExist[] = _T(
  "The folder:\n\n"
  "%s\n\n"
  "does not exist. Do you want the folder to be created?");
const TCHAR c_szErrInvalidPath[] = _T(
  "The folder:"
  "\n\n"
  "%s\n\n"
  "is invalid. Please reenter.");
const TCHAR c_szErrCreatePath[] = _T(
  "The folder:"
  "\n\n"
  "%s"
  "\n\ncan not be created. Please double check.");

//return -1: user break;
//return 0: no error
//return 1: lpPath is invalid
//return 2: can not create lpPath
int CPathDialog::MakeSurePathExists(LPCTSTR lpPath)
{
  CString strMsg;
  int iRet;
  try
    {
    //validate path
    iRet=Touch(lpPath, TRUE);
    if(iRet!=0)
      {
      throw iRet;
      }

    if(_taccess(lpPath, 0)==0)
      {
      return (int)0;
      }

    strMsg.Format(c_FolderDoesNotExist, lpPath);
    if(AfxMessageBox(strMsg, MB_YESNO|MB_ICONQUESTION) != IDYES)
      {
      return (int)-1;
      }

    //create path
    iRet=Touch(lpPath, FALSE);
    if(iRet!=0)
      {
      throw iRet; 
      }

    return 0;
    }
  catch(int nErrCode)
    {
    switch(nErrCode)
      {
      case 1:
        strMsg.Format(c_szErrInvalidPath, lpPath);
        break;
      case 2:
      default:
        strMsg.Format(c_szErrCreatePath, lpPath);
        break;
      }

    AfxMessageBox(strMsg, MB_OK|MB_ICONEXCLAMATION);

    }

  return iRet;
}

//return 0: no error
//return 1: lpPath is invalid
//return 2: lpPath can not be created(bValidate==FALSE)
int CPathDialog::Touch(LPCTSTR lpPath, BOOL bValidate)
{
  if(lpPath==NULL)
    {
    return 1;
    }

  TCHAR szPath[MAX_PATH];
  _tcscpy(szPath, lpPath);
  size_t nLen = _tcslen(szPath);

  int i;
  if(nLen==3)
    {
    if(!bValidate)
      {
      if(_access(szPath, 0)!=0)
        {
        return 2;
        }
      }
    return 0;
    }

  i = 3;
  BOOL bLastOne=TRUE;
  LPTSTR lpCurrentName;
  while(szPath[i]!=0)
    {
    lpCurrentName = &szPath[i];
    while( (szPath[i]!=0) && (szPath[i]!=_T('\\')) )
      {
      i++;
      }

    bLastOne =(szPath[i]==0);
    szPath[i] = 0;

    if(!bValidate)
      {
      CreateDirectory(szPath, NULL);
      if(_taccess(szPath, 0)!=0)
        {
        return 2;
        }
      }

    if(bLastOne)
      {
      break; //it's done
      }
    else
      {
      szPath[i] = _T('\\');
      }

    i++;
    }

  return (bLastOne?0:1);
}

//return 0: ok
//return 1: error
int CPathDialog::ConcatPath(LPTSTR lpRoot, LPCTSTR lpMorePath)
{
  if(lpRoot==NULL)
    {
    return 1;
    }

  size_t nLen = _tcslen(lpRoot);

  if(nLen<3)
    {
    return 1;
    }

  if(lpMorePath==NULL)
    {
    return 0;
    }

  if(nLen==3)
    {
    _tcscat(lpRoot, lpMorePath);
    return 0;
    }

  _tcscat(lpRoot, _T("\\"));
  _tcscat(lpRoot, lpMorePath);

  return 0;
}