File-boxes in MFC

Wouldn't it be nice to have drive, dir and file-boxes, as in VisualBasic, in MFC. This project give you just that possibility. To use these list-boxes in your project include FileList.h and FileList.cpp in your project and add the following code:

class CLBFileDlg : public CDialog
{
    ...
public:
    // Dialog Data
    
//{{AFX_VIRTUAL(CLBFileDlg)	
protected:
    ...	
    virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam);	
    ...
    //}}AFX_VIRTUAL
private:	
    ...
    //the three boxes in this example
    CFileList m_cflDrive;
	CFileList m_cflDir;	
    CFileList m_cflFile;
    //user-defined message for communication between the boxes
    //and dialog (msg is trapped in WindowProc)
    UINT m_nBoxMsg;	
    ...
};
							
BOOL CLBFileDlg::OnInitDialog()
{
    ...	
    // TODO: Add extra initialization here	
    //register a personal, user-defined msg so that our boxes can post msg's for	
    //interaction	
    m_nBoxMsg=RegisterWindowMessage("Tom's little box");	

    //init the  boxes	

    //the definition of:	
    //BOOL InitBox(UINT res_from_template, 	
    //	       CWnd *parent, 	
    //	       LPSTR lpszPath, 	
    //	       LPSTR lpszFileMask, 	
    //	       UINT flags, 	
    //	       UINT msg);	

    m_cflDrive.InitBox(IDC_LIST_DRIVE, this, "c:\\", "*.*", DRIVES, m_nBoxMsg);	
    m_cflDir.InitBox(IDC_LIST_DIR, this, "c:\\", "*.*", DIRECTORIES, m_nBoxMsg);	
    m_cflFile.InitBox(IDC_LIST_FILE, this, "c:\\", "*.*", FILES, m_nBoxMsg);	

    //in this example we'll just display the selected file in a CStatic	
    m_clsSelection.InitSelect(IDC_SELECT, this);
    ...
}

LRESULT CLBFileDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) 
{
    // TODO: Add your specialized code here and/or call the base class
    ...	
        //process the user-defined msg	
        if(message==m_nBoxMsg)
        {	
            CString temp_string;
            
            //update the dir-box and file-box if we change drive
            if(wParam==DRIVES)		
            {		
                m_cflDir.RefreshBox(m_cflDrive.getPath());
                m_cflFile.RefreshBox(m_cflDrive.getPath());	
            }	
            
            //update the file-box if we change directory
            else if(wParam==DIRECTORIES)		
            {		
                m_cflFile.RefreshBox(m_cflDir.getPath());
            }
            
            //for simplicity we'll just show the selected file	
            //in the CStatic	
            else if(wParam==FILES)	
            {		
                m_cflFile.GetText(m_cflFile.GetCurSel(), temp_string);	
                m_clsSelection.SetWindowText(temp_string);	
            }
        }
        ...	
        return CDialog::WindowProc(message, wParam, lParam);
}

Minor update:

Changes since v. 1.0
  • improving update in FillBox(): no update untill the box is filled
  • much faster draw
  • declaring CheckEntry as inline and changing the argument
  • moving FillBox over to private-sector
  • improving OnDblclk():
    if you use the dir-box a lot then the path may look like this
    c:\inn\pics\..\html\..\..\windows\system\..\..\det.log
    this a right and proper path but of course this one can
    be much slimmer, like this:
    c:\det.log

As far as I can see, all the updates are internal to FileList and does not invalidate usage of this class. However since the header has had an update, a recompile of the project is required.

Download demo project - 20 KB



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