January 9, 2009 02:36am pst

12.04.2008 at 11:36AM PST, ID: 23957975

	[x] Attachment Details

how do I get the notification of the return key on a CTreeCtrl derived class?

[x]

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9.3

Zones:

Windows MFC Programming, Microsoft Visual C++

Tags:

c++, mfc

I have added a CTreeCtr derived class to a dialog which I later add to a tab control and when I select the tree ctrl object and press the return key, the parent dialog, including the treectrl, dissapears. I'm trying to avoid this by capturing the return key and I've used OnOk, OnCancel, and OnNotify with no success... I've also tried OnOk and OnNotify on the parent dialog and the parent tabcontrol with no success.

By "added" I meant that I dragged a tree control from the control tool bar to my dialog in the visual studio dialog editor. Then I create a member variable for it and I change the type in the header file from CTreeCtrl to my own ctreecontrol.

How can I avoid the return key from making my dialog not visible, or how can I capture the return key?

         
           
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             declaration:
 
class CDirTreeCtrl : public CTreeCtrl
{
 
public:
    CDirTreeCtrl(CString startingPath = (CString)"");
    virtual ~CDirTreeCtrl();
protected:
    afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);
    virtual void OnOk();
    virtual void OnCancel();
    virtual BOOL OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult);
    //}}AFX_MSG
 
    DECLARE_MESSAGE_MAP()
};
 
definition:
 
#include "stdafx.h"
 
#include "DirTreeCtrl.h"
#include "SortStringArray.h"
 
 
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
 
CDirTreeCtrl::CDirTreeCtrl(CString startingPath)
{
    m_strRoot = startingPath;      
}
 
CDirTreeCtrl::~CDirTreeCtrl()
{
    m_imgList.Detach();
}
 
 
BEGIN_MESSAGE_MAP(CDirTreeCtrl, CTreeCtrl)
    //{{AFX_MSG_MAP(CDirTreeCtrl)
    ON_NOTIFY_REFLECT(TVN_ITEMEXPANDED, OnItemexpanded)
	//ON_WM_KEYDOWN()
 
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()
 
void CDirTreeCtrl::OnOk() 
{
    AfxMessageBox("I got you ");	
}
void CDirTreeCtrl::OnCancel() 
{
    //AfxMessageBox("hola hola");
}
void CDirTreeCtrl::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
    AfxMessageBox("I got you ");	
	
//	CWnd::OnKeyDown(nChar, nRepCnt, nFlags);
}
 
 
BOOL CDirTreeCtrl::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult) 
{
     HD_NOTIFY *pHDN = (HD_NOTIFY*)lParam;
     TRACE1("ddd %d\n", pHDN->hdr.code);
     return CWnd::OnNotify(wParam, lParam, pResult);
}

           
         

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