Re: Hide dialog at first

From:
mfc <mfcprog@googlemail.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Thu, 18 Nov 2010 02:31:51 -0800 (PST)
Message-ID:
<5c049851-0f50-43a8-b513-2f69c1dbd603@d8g2000yqf.googlegroups.com>
Thanks for your answers. I`ve changed my cstatic class according to
your recommendations.

class CImageStatic :
    public CStatic
{
public:
    CImageStatic(void);
    virtual ~CImageStatic(void);

protected:
    BITMAP bm;
    HBITMAP hBitmap;

protected:
    afx_msg BOOL OnEraseBkgnd(CDC* pDC);
    afx_msg void OnPaint();

    DECLARE_MESSAGE_MAP()
};

CImageStatic::CImageStatic(void)
{

    hBitmap = (HBITMAP)LoadImage( GetModuleHandle(NULL),
                MAKEINTRESOURCE(IDB_EDTBOX),
                IMAGE_BITMAP,
                0,
                0,
                LR_CREATEDIBSECTION | LR_DEFAULTCOLOR);

    if( hBitmap == NULL )
        return;

    GetObject(hBitmap, sizeof(BITMAP), &bm );
}

One question: What are you suggesting to do if the LoadImage() method
failed for any reason, or is it sure that is always will work? Writing
a short comment into the logfile and no further information to the
user?

BOOL CImageStatic::OnEraseBkgnd(CDC* pDC)
{
    return TRUE;
}

void CImageStatic::OnPaint()
{
    CPaintDC dc(this); // device context for painting
    CPoint size( bm.bmWidth, bm.bmHeight );

    CRect rect;
    GetClientRect(rect);
    CBrush brush;
    brush.CreateSolidBrush(RGB(0,0,0));

    CDC MemDC;
    MemDC.CreateCompatibleDC(&dc);

    int SavedState = MemDC.SaveDC();
    MemDC.SelectObject(hBitmap);
    dc.FillRect(rect, &brush);
    dc.BitBlt(0,0,size.x,size.y,&MemDC,0,0,SRCCOPY);

    //init some default values in the constructor as well as the option
    //to change these colors with some methods...
    dc.SetTextColor(RGB(255,255,255));
    dc.SetBkColor(RGB(0,0,0));
    dc.SetBkMode(RGB(0,0,0));
    dc.TextOut(0, 0, _T("test"), 5); // whatever...

    MemDC.RestoreDC(SavedState);
}

How is it possible to use SetWindowText() in any OnInitDialog() method
for a member of this class, so that the text will be shown? Do I have
to use GetWindowText() in the OnPaint() method of CImageStatic class
to get the text and after that dc.Textout()?

void MyDlg::OnInitDialog()
{
    //CImageStatic member
    m_MyStaticImg.SetWindowText(_T("test-text"));
   return TRUE;
}

best regards
Hans

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