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Indicating an empty ListView

, 11 Jan 2000 CPOL
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Instead of presenting a blank screen if your list control is empty, why not try this?

Sample Image - EmptyLV.gif

When using a ListView it may be useful to inform the user that the control is empty, like Microsoft Outlook does. Doing this is pretty straightforward. Just derive your own ListView control from CListCtrl and add a WM_PAINT event handler to your derived class.

class CEmptyListCtrl : public CListCtrl
{
// Construction
public:

// Overrides
protected:
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CEmptyListCtrl)
	//}}AFX_VIRTUAL

// Implementation
public:

// Generated message map functions
protected:
	//{{AFX_MSG(CEmptyListCtrl)
	afx_msg void OnPaint();
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

Then, in OnPaint member function, implement the code necessary to handle the empty condition.

void CEmptyListCtrl::OnPaint() 
{
    Default();
    if (GetItemCount() <= 0)
    {
        COLORREF clrText = ::GetSysColor(COLOR_WINDOWTEXT);
        COLORREF clrTextBk = ::GetSysColor(COLOR_WINDOW);

        CDC* pDC = GetDC();
        // Save dc state
        int nSavedDC = pDC->SaveDC();

        CRect rc;
        GetWindowRect(&rc);
        ScreenToClient(&rc);

        CHeaderCtrl* pHC;
        pHC = GetHeaderCtrl();
        if (pHC != NULL)
        {
            CRect rcH;
            pHC->GetItemRect(0, &rcH);
            rc.top += rcH.bottom;
        }
        rc.top += 10;

        CString strText((LPCSTR)IDS_NOITEMS); // The message you want!

        pDC->SetTextColor(clrText);
        pDC->SetBkColor(clrTextBk);
        pDC->FillRect(rc, &CBrush(clrTextBk));
        pDC->SelectStockObject(ANSI_VAR_FONT);
        pDC->DrawText(strText, -1, rc, 
                      DT_CENTER | DT_WORDBREAK | DT_NOPREFIX | DT_NOCLIP);

        // Restore dc
        pDC->RestoreDC(nSavedDC);
        ReleaseDC(pDC);
    }
    // Do not call CListCtrl::OnPaint() for painting messages
}

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

GHINI Mauro

Italy Italy
No Biography provided

Comments and Discussions

 
Generaluseful idea Pin
CIDev24-Sep-10 5:56
memberCIDev24-Sep-10 5:56 
GeneralA non MFC version Pin
ineox24-Mar-10 3:37
memberineox24-Mar-10 3:37 
GeneralError Pin
Adi Narayana22-May-06 22:30
memberAdi Narayana22-May-06 22:30 
GeneralBugs Pin
Tim L18-Nov-05 10:24
memberTim L18-Nov-05 10:24 
GeneralUsing the default listview font and colors Pin
javrillon23-Jul-04 7:38
memberjavrillon23-Jul-04 7:38 
QuestionHow to use in a DLL Pin
LordLiverpool22-May-03 4:37
memberLordLiverpool22-May-03 4:37 
Generallistview adding mutiple colored row selection Pin
Anonymous2-Apr-02 10:16
memberAnonymous2-Apr-02 10:16 
GeneralPerhaps a better way... Pin
David Fleming7-Mar-02 12:19
memberDavid Fleming7-Mar-02 12:19 
GeneralRe: Perhaps a better way... Pin
Atlantys19-Sep-02 7:46
memberAtlantys19-Sep-02 7:46 
GeneralRe: Perhaps a better way... Pin
Stlan7-Oct-03 4:27
memberStlan7-Oct-03 4:27 
GeneralRe: Perhaps a better way... Pin
David Fleming7-Oct-03 7:18
memberDavid Fleming7-Oct-03 7:18 
Hmm. I never checked that.

Does it work OK the way the author does it, even with gridlines?

I generally don't use gridlines, so I never checked it (either the author's way or mine).

Thanks.
GeneralRe: Perhaps a better way... Pin
Stlan7-Oct-03 20:20
memberStlan7-Oct-03 20:20 
GeneralRe: Perhaps a better way... Pin
Ron Olson16-Jun-04 6:31
sussRon Olson16-Jun-04 6:31 
GeneralRe: Perhaps a better way... Pin
David Fleming16-Jun-04 7:13
memberDavid Fleming16-Jun-04 7:13 
GeneralRe: Perhaps a better way... Pin
Ron Olson16-Jun-04 17:02
memberRon Olson16-Jun-04 17:02 
Generaltoo complicated Pin
Anonymous2-Mar-02 3:22
memberAnonymous2-Mar-02 3:22 
GeneralRe: too complicated Pin
Martijn18-Sep-03 3:28
memberMartijn18-Sep-03 3:28 
GeneralI can't get this code to work Pin
DanYELL24-Aug-01 15:48
memberDanYELL24-Aug-01 15:48 
Generalgot it working for a ClistView Pin
X23-Oct-00 16:21
sussX23-Oct-00 16:21 
QuestionHow does control get painted when the row count > 0??? Pin
Caleb15-Aug-00 16:58
sussCaleb15-Aug-00 16:58 
AnswerFound better example at Codeguru Pin
Caleb15-Aug-00 18:41
sussCaleb15-Aug-00 18:41 
GeneralSuggestion for Call Back List Control Type Pin
Murugan N.V.7-Jun-00 11:47
sussMurugan N.V.7-Jun-00 11:47 
GeneralDisabled ListCtrl Pin
Leo Davidson13-Jan-00 8:15
sussLeo Davidson13-Jan-00 8:15 

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