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05.08.2008 at 11:35AM PDT, ID: 23387164
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9.4

CDialog with Scrool Bar and Drawing

Asked by suvendulaha in Windows MFC Programming, Windows Programming

Tags:

I have CDialog Class . I add scroll bar ot it. I am scrolling, the graphics be become vanished. I want to draw the graphics aslo. could you please help me.Start Free Trial 
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class CSystemEnclosureCabinateDlg : public CDialog
{
	DECLARE_DYNAMIC(CSystemEnclosureCabinateDlg)
 
public:
	CSystemEnclosureCabinateDlg(CWnd* pParent = NULL);   // standard constructor
	virtual ~CSystemEnclosureCabinateDlg();
 
// Dialog Data
	enum { IDD = IDD_DIALOG_ENCLOSURE_CABINATE };
 
	CRect	m_rcOriginalRect;
	BOOL	m_bDragging;
	CPoint	m_ptDragPoint;	
	int		m_nScrollPos;	
	int		m_nHScrollPos;	
	int		m_nCurHeight;
	int     m_nCurWidth;
 
	
protected:
	CBrush m_brush;
protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
 
	DECLARE_MESSAGE_MAP()
public:
	virtual BOOL OnInitDialog();
	afx_msg void OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar);
	afx_msg void OnSize(UINT nType, int cx, int cy);
	afx_msg HBRUSH OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor);
	afx_msg void OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar);
	afx_msg void OnPaint();
};
 
///////////CPP //////////////file
IMPLEMENT_DYNAMIC(CSystemEnclosureCabinateDlg, CDialog)
CSystemEnclosureCabinateDlg::CSystemEnclosureCabinateDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CSystemEnclosureCabinateDlg::IDD, pParent)
{
	Create(CSystemEnclosureCabinateDlg::IDD,pParent);
}
 
CSystemEnclosureCabinateDlg::~CSystemEnclosureCabinateDlg()
{
}
 
void CSystemEnclosureCabinateDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}
 
 
BEGIN_MESSAGE_MAP(CSystemEnclosureCabinateDlg, CDialog)
	ON_WM_CTLCOLOR()
	ON_WM_VSCROLL()
	ON_WM_SIZE()
	ON_WM_HSCROLL()
	ON_WM_PAINT()
END_MESSAGE_MAP()
 
 
// CSystemEnclosureCabinateDlg message handlers
 
BOOL CSystemEnclosureCabinateDlg::OnInitDialog()
{
	CDialog::OnInitDialog();
 
	m_brush.CreateSolidBrush(RGB(255, 255, 255)); 
 
	GetWindowRect(m_rcOriginalRect);
	m_nScrollPos = 0; 
	m_nHScrollPos = 0;
 
	return TRUE;  // return TRUE unless you set the focus to a control
	// EXCEPTION: OCX Property Pages should return FALSE
}
 
HBRUSH CSystemEnclosureCabinateDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
	HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
 
	// TODO:  Change any attributes of the DC here
 
	return m_brush;
}
 
void CSystemEnclosureCabinateDlg::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar) 
{
	int nDelta;
	int nMaxPos = m_rcOriginalRect.Height() - m_nCurHeight;
 
	switch (nSBCode)
	{
	case SB_LINEDOWN:
		if (m_nScrollPos >= nMaxPos)
			return;
 
		nDelta = min(max(nMaxPos/20,5),nMaxPos-m_nScrollPos);
		break;
 
	case SB_LINEUP:
		if (m_nScrollPos <= 0)
			return;
		nDelta = -min(max(nMaxPos/20,5),m_nScrollPos);
		break;
	case SB_PAGEDOWN:
		if (m_nScrollPos >= nMaxPos)
			return;
		nDelta = min(max(nMaxPos/10,5),nMaxPos-m_nScrollPos);
		break;
	case SB_THUMBTRACK:
	case SB_THUMBPOSITION:
		nDelta = (int)nPos - m_nScrollPos;
		break;
 
	case SB_PAGEUP:
		if (m_nScrollPos <= 0)
			return;
		nDelta = -min(max(nMaxPos/10,5),m_nScrollPos);
		break;
	
         default:
		return;
	}
	m_nScrollPos += nDelta;
	SetScrollPos(SB_VERT,m_nScrollPos,TRUE);
	ScrollWindow(0,-nDelta);
	CDialog::OnVScroll(nSBCode, nPos, pScrollBar);
}
 
void CSystemEnclosureCabinateDlg::OnSize(UINT nType, int cx, int cy) 
{
	CDialog::OnSize(nType, cx, cy);
 
	m_nCurHeight = cy;
	m_nCurWidth = cx;
 
	SCROLLINFO si;
	si.cbSize = sizeof(SCROLLINFO);
	si.fMask = SIF_ALL; 
	si.nMin = 0;
	si.nMax = m_rcOriginalRect.Height();
	si.nPage = cy;
	si.nPos = 0;
    SetScrollInfo(SB_VERT, &si, TRUE); 	
 
	SCROLLINFO si1;
	si1.cbSize = sizeof(SCROLLINFO);
	si1.fMask = SIF_ALL; 
	si1.nMin = 0;
	si1.nMax = m_rcOriginalRect.Width();
	si1.nPage = cx;
	si1.nPos = 0;
    SetScrollInfo(SB_HORZ, &si1, TRUE); 	
 
 
}
 
 
 
 
 
 
 
 
 
 
 
void CSystemEnclosureCabinateDlg::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
	
 
	int nDelta;
	int nMaxPos = m_rcOriginalRect.Width() - m_nCurWidth;
 
	switch (nSBCode)
	{
	case SB_LINERIGHT:
		if (m_nHScrollPos >= nMaxPos)
			return;
 
		nDelta = min(max(nMaxPos/20,5),nMaxPos-m_nHScrollPos);
		break;
 
	case SB_LINELEFT:
		if (m_nHScrollPos <= 0)
			return;
		nDelta = -min(max(nMaxPos/20,5),m_nHScrollPos);
		break;
	case SB_PAGERIGHT:
		if (m_nScrollPos >= nMaxPos)
			return;
		nDelta = min(max(nMaxPos/10,5),nMaxPos-m_nHScrollPos);
		break;
	case SB_THUMBTRACK:
	case SB_THUMBPOSITION:
		nDelta = (int)nPos - m_nHScrollPos;
		break;
 
	case SB_PAGELEFT:
		if (m_nScrollPos <= 0)
			return;
		nDelta = -min(max(nMaxPos/10,5),m_nHScrollPos);
		break;
	
         default:
		return;
	}
	m_nHScrollPos += nDelta;
	SetScrollPos(SB_HORZ,m_nHScrollPos,TRUE);
	ScrollWindow(-nDelta,0);
 
	CDialog::OnHScroll(nSBCode, nPos, pScrollBar);
}
 
void CSystemEnclosureCabinateDlg::OnPaint()
{
	CPaintDC dc(this); // device context for painting
	// TODO: Add your message handler code here
	// Do not call CDialog::OnPaint() for painting messages
	dc.MoveTo(0 ,100);
	dc.LineTo(1000,100);
}
 
Keywords: CDialog with Scrool Bar and Drawing
Title
1 override OnPaint() in CDialog
2 How to handle Mouse movement/ Dra…
3 Dynamic CDialog
4 GrayString in CDialog
5 Painting CDialog's border
6 CDialog with CScrollView
 
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[+][-]05.08.2008 at 09:18PM PDT, ID: 21530367

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[+][-]05.09.2008 at 06:05AM PDT, ID: 21532337

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[+][-]05.09.2008 at 09:51PM PDT, ID: 21537893

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About this solution

Zones: Windows MFC Programming, Windows Programming
Tags: VC++ MFC
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Solution Provided By: mahesh1402
Participating Experts: 1
Solution Grade: A
 
 
[+][-]08.09.2008 at 10:49AM PDT, ID: 22197003

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[+][-]08.13.2008 at 04:11PM PDT, ID: 22226504

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