PanningButton.h

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#if !defined(AFX_PANNINGBUTTON_H__B7B65E67_B459_4C91_A578_16AF27271A47__INCLUDED_)
#define AFX_PANNINGBUTTON_H__B7B65E67_B459_4C91_A578_16AF27271A47__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// PanningButton.h : header file
//

// CPanningButton window

class CPanningButton : public CWnd
{
// Construction
public:
        CPanningButton();
        bool Create();
        void SetBitmapDC(HWND owner, HDC bdc, HBITMAP oldBmp, CRect& ori, CRect& rect, COLORREF& bkgrnd);
        void SetViewRect(CRect vrect);

private:
        HCURSOR         m_arrowh;
        HCURSOR         m_sizeallh;
        COLORREF        m_backgorund;

        bool    m_inMove;
        CPoint  m_moveStartPoint;
        CRect   m_moveStartRect;

        HWND    m_owner;
        HDC             m_bitmapDC;
        HBITMAP m_oldBmp;
        CRect   m_bitmapSizeOri;
        CRect   m_bitmapSizeStored;
        CRect   m_bitmapOnScreen;

        CRect   m_viewRectOnStored;

        CRect   m_viewRectOnScreen;
        CRect   m_viewRectInMove;

        double m_storedToScreenRx;
        double m_storedToScreenRy;
        double m_oriToStoredRx;
        double m_oriToStoredRy;

        void BmpToScreen(CRect clientr);
        void ViewRectToScreen(CRect& vRect);
        void DeleteDeviceContext(HDC bDC, HBITMAP oldBmp);

// Operations
public:

// Overrides
        // ClassWizard generated virtual function overrides
        //{{AFX_VIRTUAL(CPanningButton)
        //}}AFX_VIRTUAL

// Implementation
public:
        virtual ~CPanningButton();

        // Generated message map functions
protected:
        //{{AFX_MSG(CPanningButton)
        afx_msg void OnPaint();
        afx_msg BOOL OnEraseBkgnd(CDC* pDC);
        afx_msg void OnMouseMove(UINT nFlags, CPoint point);
        afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
        afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
        //}}AFX_MSG

        DECLARE_MESSAGE_MAP()
};


//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_PANNINGBUTTON_H__B7B65E67_B459_4C91_A578_16AF27271A47__INCLUDED_)