memdc.h

用VC写的一个将串口数据用图形曲线的形式显示出来。这是一个项目中的一部分。

// MemDC.h: interface for the CMemDC class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_MEMDC_H__134051AE_CDFC_4330_8C74_C0CD361B49C6__INCLUDED_)
#define AFX_MEMDC_H__134051AE_CDFC_4330_8C74_C0CD361B49C6__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

class CMemDC : public CDC
{
public:
    CMemDC(CDC* pDC, CRect* pRect=NULL, CBitmap* pBitmap=NULL);
    CMemDC() : m_bPrinting(TRUE), m_Offset(0, 0) {};
    virtual ~CMemDC();

    void        FillSolidRect(LPCRECT lpRect, COLORREF clr);
    int         DrawText(LPCTSTR lpszString, int nCount, LPRECT lpRect, UINT nFormat);
    int         DrawText(const CString& str, LPRECT lpRect, UINT nFormat) {return CMemDC::DrawText((LPCTSTR)str, str.GetLength(), lpRect, nFormat);};
    BOOL        TextOut(int x, int y, LPCTSTR lpszString, int nCount);
    BOOL        TextOut(int x, int y, const CString& str) {return CMemDC::TextOut(x, y, (LPCTSTR)str, str.GetLength());};
    CPoint      MoveTo(POINT point) {return CMemDC::MoveTo(point.x, point.y);};
    CPoint      MoveTo(int x, int y);
    CPoint      LineTo(POINT point) {return CMemDC::LineTo(point.x, point.y);};
    CPoint      LineTo(int x, int y);

    BOOL        FillRgn(CRgn* pRgn, CBrush* pBrush);
    BOOL        Polygon(LPPOINT lpPoints, int nCount);
    BOOL        Polyline(LPPOINT lpPoints, int nCount);

    BOOL        Ellipse(int x1, int y1, int x2, int y2);
    BOOL        Ellipse(LPCRECT lpRect) {return CMemDC::Ellipse(lpRect->left, lpRect->top, lpRect->right, lpRect->bottom);};

    BOOL        Pie(int x1, int y1, int x2, int y2, int x3, int y3, int x4, int y4);
    BOOL        Pie(LPCRECT lpRect, POINT ptStart, POINT ptEnd) {return CMemDC::Pie(lpRect->left, lpRect->top, lpRect->right, lpRect->bottom, ptStart.x, ptStart.y, ptEnd.x, ptEnd.y);};

    BOOL        DrawIcon(int x, int y, HICON hIcon);
    BOOL        DrawIcon(POINT point, HICON hIcon) {return CMemDC::DrawIcon(point.x, point.y, hIcon);};

    BOOL        BitBlt(int x, int y, int nWidth, int nHeight, CDC* pSrcDC, int xSrc, int ySrc, DWORD dwRop);

    CPen*       SelectObject(CPen* pPen);
    CBrush*     SelectObject(CBrush* pBrush);
    CFont*      SelectObject(CFont* pFont);
    CBitmap*    SelectObject(CBitmap* pBitmap);
    int         SelectObject(CRgn* pRgn);

private:
    COLORREF    m_crBG;
    COLORREF    m_crTX;
    CPen*       m_pPen;
    CBrush*     m_pBrush;
    CFont*      m_pFont;
	CBitmap*    m_pBitmap;

    BOOL        m_bPrinting;

public:
    CPoint      m_Offset;
    
};

#endif // !defined(AFX_MEMDC_H__134051AE_CDFC_4330_8C74_C0CD361B49C6__INCLUDED_)