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CDirTreeCtrl for displaying or selecting Folders and Files

Environment: Visual C++ 6.0 SP3 This DirTreeCtrl allows a user to display folders and Filenames(optional). The control uses the system image list for displaying the icons for the items in the DirTreeCtrl. You must not manage the Icon-Resources int the ImageList. The items sorted first by foldernames and then (if selected) by filenames. You can […]

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Apr 29, 2000

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Environment: Visual C++ 6.0 SP3

This DirTreeCtrl allows a user to display folders and Filenames(optional).

The control uses the system image list for displaying the icons for the items in

the DirTreeCtrl.

You must not manage the Icon-Resources int the ImageList. The items sorted first by

foldernames and then (if selected) by filenames.

You can obtain the the full PathName of an Item.

You can set a start path before displaying the TreeItems.

You can select a subpath.

How to use this control:

Use it in a Dialog:

To use the control in a Dialog do the following steps:

Create a CTreeCtrl in your Dialog resource.

Define a member variable for the CDirTreeCtrl in the Dialog header file.

CDirTreeCtrl m_DirTree;

Insert the Following Code in your OnInitDialog function:

BOOL CTreeDialog::OnInitDialog()
{
 CDialog::OnInitDialog();
 TCHAR  szWorkDir[MAX_PATH];
 // TODO: Add extra initialization here
 // Here we subclass our CDirTreeCtrl
 if ( !m_TreeCtrl.m_hWnd )
 {
  if ( m_TreeCtrl.SubclassDlgItem( IDC_TREE1, this ) )
  {
   m_TreeCtrl.DisplayTree( NULL /*Display all*/,
                           TRUE /* TRUE = Display Files*/ );
   _getcwd( szWorkDir, 256 );
   // set the Path to the current Work-Directory
   m_TreeCtrl.SetSelPath( szWorkDir );
  }
 }
 return TRUE; // return TRUE unless you set the focus to a control
 // EXCEPTION: OCX Property Pages should return FALSE
}

Using the CDirTreeCtrl in a CView

To use this control in a CView class do the following steps:

Define a CTreeCtrl member in your CView header file.

Define a ID_TREECTRL identifier in your CView header file.

In the class wizard implement the create function for the CView class.

Modify the CView::Create function listed below

In the class wizard implement the WM_SIZE function.

Modify the CView::OnSize function listed below.

BOOL CLeftView::Create(LPCTSTR lpszClassName,
                       LPCTSTR lpszWindowName,
                       DWORD dwStyle,
                       const RECT& rect,
                       CWnd* pParentWnd,
                       UINT nID,
                       CCreateContext* pContext)
{
 // TODO: Add your specialized code here and/or call the base class
 BOOL  bRet;
 bRet = CWnd::Create(lpszClassName,
                     lpszWindowName,
                     dwStyle,
                     rect,
                     pParentWnd,
                     nID,
                     pContext);
 // this part creates the TreeCtrl and use the CLeftView
 // as his parent Window
 if ( m_DirTree.m_hWnd == NULL && bRet )
 {
  bRet = m_DirTree.Create(WS_CHILD | TVS_LINESATROOT |
                          TVS_HASBUTTONS | WS_VISIBLE |
                          TVS_HASLINES,
                          CRect(0, 0, 0, 0),
                          this
                          ID_TREECTRL );
  if ( bRet )
   m_DirTree.DisplayTree( NULL, TRUE );
 }
 return bRet;
}
void CLeftView::OnSize(UINT nType, int cx, int cy)
{
 CView::OnSize(nType, cx, cy);
 // TODO: Add your message handler code here
 if ( m_DirTree.m_hWnd )
  m_DirTree.SetWindowPos( NULL, 0, 0, cx, cy, SWP_NOZORDER | SWP_NOMOVE );
}

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