// uizoom.h : header file
//	Implements Zooming functions in a CScrollView window
//
// Written by Brad Pirtle, CS:72450,1156, Internet:pirtle@qlogic.com
// Copyright 1994, QuickLogic Corp., all rights reserved.
// Version 1.0
#ifndef ZOOMVIEW_H
#define ZOOMVIEW_H

/////////////////////////////////////////////////////////////////////////////
// CZoomView view
class CZoomView : public CScrollView
{
    DECLARE_DYNCREATE(CZoomView)
protected:
    CZoomView();	// protected constructor used by dynamic creation

    // Operations
public:
    // Overridden CScrollView member functions
    void SetZoomSizes(SIZE sizeTotal,
                      const SIZE& sizePage = sizeDefault,
                      const SIZE& sizeLine = sizeDefault);
    void CenterOnLogicalPoint(CPoint ptCenter);
    CPoint GetLogicalCenterPoint(void);

    // Zooming functions
    typedef enum {MODE_ZOOMOFF, MODE_ZOOMIN, MODE_ZOOMOUT} ZoomMode_;
    void      SetZoomMode(ZoomMode_ zoomMode);
    ZoomMode_ GetZoomMode() {return m_zoomMode;};
    int       DoZoomIn    (CRect &rect);
    int       DoZoomIn    (CPoint *point = NULL, double delta = 1.25);
    int       DoZoomOut   (CPoint *point = NULL, double delta = 1.25);
    int       DoZoomFull  ();
    // bdelmee code change
    double    GetZoomRatio() const { return m_zoomScale; }
    void      SetZoomRatio( double r ) { m_zoomScale = r; }

    // Override this to get notified of zoom scale change
    virtual void NotifyZoom(void) {};

    // Zooming utility functions
    void    ViewDPtoLP (LPPOINT lpPoints, int nCount = 1);
    void    ViewLPtoDP (LPPOINT lpPoints, int nCount = 1);
    void    ClientToDevice(CPoint &point);
    void    NormalizeRect(CRect &rect);
    void    DrawBox(CDC &dc, CRect &rect, bool xor = true);
    void    DrawLine(CDC &dc, const int &x1, const int &y1,
                     const int &x2, const int &y2, bool xor = true);

    // Implementation
protected:
    virtual ~CZoomView();
#ifdef _DEBUG
    virtual void AssertValid() const;
#endif //_DEBUG
    virtual void OnPrepareDC(CDC* pDC, CPrintInfo* pInfo = NULL);
    virtual void OnDraw(CDC* pDC) { };
private:
    // Internally called functions
    void	PersistRatio(const CSize &orig, CSize &dest, CPoint &remainder);
    void	CalcBars(void);

    // Private member variables
    ZoomMode_ m_zoomMode;
    bool      m_bCaptured;
    CRect     m_ptDragRect;
    CSize     m_origTotalDev;           // Original total size in device units
    CSize     m_origPageDev;            // Original per page scroll size in device units
    CSize     m_origLineDev;            // Original per line scroll size in device units
    double    m_zoomScale;
    HCURSOR   m_hZoomCursor;

public:
    // Generated message map functions
    //{{AFX_MSG(CZoomView)
    afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
    afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
    afx_msg void OnMouseMove(UINT nFlags, CPoint point);
    afx_msg void OnRButtonDown(UINT nFlags, CPoint point);
    afx_msg BOOL OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message);
    //}}AFX_MSG

    DECLARE_MESSAGE_MAP()
};

/////////////////////////////////////////////////////////////////////////////
#endif