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Windows 2000 Common File Dialog

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16 May 2000 258.5K   2.5K   45   46
How to show the new Common File Dialog in MFC Apps in Windows 2000.

Sample Image - win2000fd.jpg

Introduction

If you've tried using the MFC common dialog class CFileDialog in Windows 2000, you'll notice that it will show the 'old' file dialog even with the OFN_EXPLORER flag set. The reason for this is that Windows 2000 uses OFN_ENABLE_HOOK flag to determine which dialog to use. If the OFN_ENABLE_HOOK flag is set, Windows 2000 uses the old dialog, if not, it uses the new dialog. CFileDialog in MFC uses the OFN_ENABLE_HOOK flag which explains why all MFC applications display the old dialog and regular applications (not compiled with MFC) show the new dialog, if run in Windows 2000. For a more detailed explanation, look in April 2000 issue of MSDN pp.138,139. I've managed to get around this by overriding some of MFC's virtual functions and not allowing MFC to set the OFN_ENABLE_HOOK flag.

Step 1:

Insert CKSDialog into your MFC project. Add the following header file to your App's implementation file.

#include "KSDialog.h"

Step 2:

Add the following function headers to you App's header file.

virtual BOOL DoPromptFileName(CString& fileName, 
  UINT nIDSTitle, DWORD lFlags, BOOL bOpenFileDialog, CDocTemplate* pTemplate);

Then enter the functions body in the your App's implementation file.

BOOL CMyAppApp::DoPromptFileName(CString& fileName, 
  UINT nIDSTitle, DWORD lFlags, BOOL bOpenFileDialog, CDocTemplate* pTemplate)
{
  CKSFileDialog dlgFile(bOpenFileDialog);
  dlgFile.SetAppPointer(this);
  dlgFile.SetStringFilter("My File Format (*.mff)|*.mff|My File Format File (*.mff)");
  dlgFile.SetMyParent(AfxGetMainWnd());
  return dlgFile.DoPromptFileName(fileName,nIDSTitle,
      lFlags,bOpenFileDialog, pTemplate);
}

Step 3:

You need to override your App's CMyAppApp::OnFileOpen() function, this can be done easily through the class wizard. Enter the following code for OnFileOpen():

void CMyAppApp::OnFileOpen() 
{
    CString newName;
    if (!DoPromptFileName(newName, AFX_IDS_OPENFILE,
      OFN_HIDEREADONLY | OFN_FILEMUSTEXIST, TRUE, NULL))
        return; // open cancelled

    OpenDocumentFile(newName);
}

Step 4:

Now, you need to override a Windows function in your document class. This will give you the ability to save using the new dialog. So in CMyAppDocument header class, override the DoSave() virtual function.

virtual BOOL DoSave(LPCTSTR lpszPathName, BOOL bReplace=TRUE );

Add the implementation of the function in your Document's implementation file.

BOOL CMyAppDoc::DoSave(LPCTSTR lpszPathName, BOOL bReplace)
{
    CKSFileDialog dlgFile(FALSE);
    dlgFile.SetDocumentPointer(this);
    dlgFile.SetAppPointer(AfxGetApp());
    dlgFile.SetMyParent(AfxGetMainWnd());
    return dlgFile.DoSave(lpszPathName,bReplace);
}

You're done.

Now, when you try to open or save a document, the Windows 2000 file dialog should pop up. See if you can make the dialog pop up in the center of your client window instead of the top left, the first time it's called. I haven't been able to do this as of yet. If I try to hook into the messaging system of CFileDialog to override WM_INITDIALOG, Windows 2000 thinks that it has to show the old style dialog.

If you want the new file dialog to pop up generically, meaning not through the standard Windows Document/View Open, Save, Save As messaging system, just use the following code: (this is also shown in the demo project). You don't have to go through the above code, just use it like a regular CFileDialog.

For saving:

const char szFilters[]="Some Kind of Files (*.fn2)|*.fn2|All Files (*.*)|*.*||";
CKSFileDialog dlg (FALSE, "fn2", NULL, 
  OFN_OVERWRITEPROMPT| OFN_HIDEREADONLY, szFilters);
dlg.SetMyParent(AfxGetMainWnd());

if (dlg.DoModal()==IDOK)
{
    //some file writing code here
}

For reading:

const char szFilters[]="Some Kind of Files (*.fn2)|*.fn2|All Files (*.*)|*.*||";
CKSFileDialog dlg (FALSE, "fn2", NULL, 
  OFN_FILEMUSTEXIST| OFN_HIDEREADONLY, szFilters);
dlg.SetMyParent(AfxGetMainWnd());

if (dlg.DoModal()==IDOK)
{
    //some file reading code here
}

License

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Comments and Discussions

 
Questionhow to add places bar & new text boxes to the open file dialog Pin
Member 79739422-Mar-04 19:18
Member 79739422-Mar-04 19:18 
AnswerRe: how to add places bar & new text boxes to the open file dialog [it works with both OFN_EXPLORER and OFN_ENABLEHOOK] Pin
mariusnr2-Aug-04 21:44
mariusnr2-Aug-04 21:44 
GeneralCFileDialogue crash Pin
ManojP2-Apr-03 17:46
ManojP2-Apr-03 17:46 
Generalset default directory Pin
Zoltan28-Jan-03 0:29
Zoltan28-Jan-03 0:29 
GeneralPlaces Bar Customization Pin
rfrenz5-Dec-02 4:33
rfrenz5-Dec-02 4:33 
GeneralRe: Places Bar Customization Pin
JoeB18-Jul-03 15:48
JoeB18-Jul-03 15:48 
GeneralSetCurrentDirectory in Windows 2000 Pin
joe123456789016-Jul-02 13:51
joe123456789016-Jul-02 13:51 
GeneralRe: SetCurrentDirectory in Windows 2000 Pin
shenion15-Feb-03 23:58
shenion15-Feb-03 23:58 
GeneralGreat Job!!! Pin
2-May-02 10:16
suss2-May-02 10:16 
GeneralCommon Dialog View Mode Pin
11-Sep-01 4:03
suss11-Sep-01 4:03 
Question2000 style dialogs in ME? Pin
8-Dec-00 3:23
suss8-Dec-00 3:23 
GeneralCentering the Dialog Pin
Brian Hart6-Sep-00 14:23
Brian Hart6-Sep-00 14:23 
GeneralRe: Centering the Dialog Pin
9-Aug-01 7:03
suss9-Aug-01 7:03 
GeneralAnother way to do it: I should patent this Pin
Mike20-Jun-00 8:12
Mike20-Jun-00 8:12 
GeneralRe: Another way to do it: I should patent this Pin
Leon Matthews28-Jun-00 19:51
Leon Matthews28-Jun-00 19:51 
GeneralRe: Another way to do it: I should patent this Pin
Kyle Alons4-Jul-00 13:31
sussKyle Alons4-Jul-00 13:31 
GeneralRe: Another way to do it: I should patent this Pin
barto13-Apr-03 2:50
barto13-Apr-03 2:50 
GeneralRe: Another way to do it: I should patent this Pin
Mark Richards23-Aug-00 9:36
Mark Richards23-Aug-00 9:36 
GeneralAlmost, but a safer approach would be to... Pin
Kirk Stowell27-Jan-01 3:49
Kirk Stowell27-Jan-01 3:49 
You almost have it, but what you really need to do here is define a new struct that includes the three (3) additional data members used by the Windows 2000 version of OPENFILENAME for example:

struct OPENFILENAMEEX : public OPENFILENAME {
void * pvReserved;
DWORD dwReserved;
DWORD FlagsEx;
};

Once you have done this you can safely call the sizeof operator to get correct storage size for the Windows 2000 OPENFILENAME structure, example:

dlg.m_ofn.lStructSize = sizeof(OPENFILENAMEEX);

It just so happens that the difference between sizeof(OPENFILENAME) and sizeof(OPENFILENAMEEX) is 12 bytes that is why the + 12 works in this situation Eek! | :eek: . The reason we need to increase the size of the lStructSize member is to give us access to the 3 additional struct members found in the Windows 2000 version of OPENFILENAME. Once we have done this the FlagsEx member becomes availiable which tells MFC to use the Windows 2000 file open dialog. However we need to take this one step further. We need to check the OS to make sure that we can use the Windows 2000 version of OPENFILENAME, for example:

// Check to see if this is Windows 2000...if so use the
// Windows 2000 version of OPENFILENAME.
DWORD dwWinMajor = (DWORD)(LOBYTE(LOWORD(::GetVersion())));
if ((BYTE)dwWinMajor >= 5) {
dlg.m_ofn.lStructSize = sizeof(OPENFILENAMEEX);
}

And that should do it...cheers.
GeneralGreat Works!! Pin
jimmy carter22-Aug-02 10:22
jimmy carter22-Aug-02 10:22 
GeneralPaul DiLascia has done it before Pin
KarstenK8-Jul-02 23:14
mveKarstenK8-Jul-02 23:14 
GeneralRe: Paul DiLascia has done it before Pin
HugoGalindo5-Aug-02 16:55
HugoGalindo5-Aug-02 16:55 
General::GetOpenFileName(&ofn); Pin
Lars Beck25-May-00 3:12
professionalLars Beck25-May-00 3:12 
GeneralRe: ::GetOpenFileName(&ofn); Pin
Anonymous20-Oct-02 4:50
Anonymous20-Oct-02 4:50 
GeneralUpdate Will Block Parent Window Pin
Keyvan Saneinejad23-May-00 15:42
Keyvan Saneinejad23-May-00 15:42 

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