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<h1>ZoomView.h</h1><div class="fragment"><pre>00001 <span class="comment">// uizoom.h : header file</span>
00002 <span class="comment">// Implements Zooming functions in a CScrollView window</span>
00003 <span class="comment">//</span>
00004 <span class="comment">// Written by Brad Pirtle, CS:72450,1156, Internet:pirtle@qlogic.com</span>
00005 <span class="comment">// Copyright 1994, QuickLogic Corp., all rights reserved.</span>
00006 <span class="comment">// Version 1.0</span>
00007 <span class="preprocessor">#ifndef ZOOMVIEW_H</span>
00008 <span class="preprocessor"></span><span class="preprocessor">#define ZOOMVIEW_H</span>
00009 <span class="preprocessor"></span><span class="comment"></span>
00010 <span class="comment">/////////////////////////////////////////////////////////////////////////////</span>
00011 <span class="comment"></span><span class="comment">// CZoomView view</span>
00012 <span class="keyword">class </span>CZoomView : <span class="keyword">public</span> CScrollView
00013 {
00014 DECLARE_DYNCREATE(CZoomView)
00015 <span class="keyword">protected</span>:
00016 CZoomView(); <span class="comment">// protected constructor used by dynamic creation</span>
00017
00018 <span class="comment">// Operations</span>
00019 <span class="keyword">public</span>:
00020 <span class="comment">// Overridden CScrollView member functions</span>
00021 <span class="keywordtype">void</span> SetZoomSizes(SIZE sizeTotal,
00022 <span class="keyword">const</span> SIZE& sizePage = sizeDefault,
00023 <span class="keyword">const</span> SIZE& sizeLine = sizeDefault);
00024 <span class="keywordtype">void</span> CenterOnLogicalPoint(CPoint ptCenter);
00025 CPoint GetLogicalCenterPoint(<span class="keywordtype">void</span>);
00026
00027 <span class="comment">// Zooming functions</span>
00028 <span class="keyword">typedef</span> <span class="keyword">enum</span> {MODE_ZOOMOFF, MODE_ZOOMIN, MODE_ZOOMOUT} ZoomMode_;
00029 <span class="keywordtype">void</span> SetZoomMode(ZoomMode_ zoomMode);
00030 ZoomMode_ GetZoomMode() {<span class="keywordflow">return</span> m_zoomMode;};
00031 <span class="keywordtype">int</span> DoZoomIn (CRect &rect);
00032 <span class="keywordtype">int</span> DoZoomIn (CPoint *point = NULL, <span class="keywordtype">double</span> delta = 1.25);
00033 <span class="keywordtype">int</span> DoZoomOut (CPoint *point = NULL, <span class="keywordtype">double</span> delta = 1.25);
00034 <span class="keywordtype">int</span> DoZoomFull ();
00035 <span class="comment">// bdelmee code change</span>
00036 <span class="keywordtype">double</span> GetZoomRatio()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> m_zoomScale; }
00037 <span class="keywordtype">void</span> SetZoomRatio( <span class="keywordtype">double</span> r ) { m_zoomScale = r; }
00038
00039 <span class="comment">// Override this to get notified of zoom scale change</span>
00040 <span class="keyword">virtual</span> <span class="keywordtype">void</span> NotifyZoom(<span class="keywordtype">void</span>) {};
00041
00042 <span class="comment">// Zooming utility functions</span>
00043 <span class="keywordtype">void</span> ViewDPtoLP (LPPOINT lpPoints, <span class="keywordtype">int</span> nCount = 1);
00044 <span class="keywordtype">void</span> ViewLPtoDP (LPPOINT lpPoints, <span class="keywordtype">int</span> nCount = 1);
00045 <span class="keywordtype">void</span> ClientToDevice(CPoint &point);
00046 <span class="keywordtype">void</span> NormalizeRect(CRect &rect);
00047 <span class="keywordtype">void</span> DrawBox(CDC &dc, CRect &rect, <span class="keywordtype">bool</span> xor = <span class="keyword">true</span>);
00048 <span class="keywordtype">void</span> DrawLine(CDC &dc, <span class="keyword">const</span> <span class="keywordtype">int</span> &x1, <span class="keyword">const</span> <span class="keywordtype">int</span> &y1,
00049 <span class="keyword">const</span> <span class="keywordtype">int</span> &x2, <span class="keyword">const</span> <span class="keywordtype">int</span> &y2, <span class="keywordtype">bool</span> xor = <span class="keyword">true</span>);
00050
00051 <span class="comment">// Implementation</span>
00052 <span class="keyword">protected</span>:
00053 <span class="keyword">virtual</span> ~CZoomView();
00054 <span class="preprocessor">#ifdef _DEBUG</span>
00055 <span class="preprocessor"></span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> AssertValid() <span class="keyword">const</span>;
00056 <span class="preprocessor">#endif //_DEBUG</span>
00057 <span class="preprocessor"></span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> OnPrepareDC(CDC* pDC, CPrintInfo* pInfo = NULL);
00058 <span class="keyword">virtual</span> <span class="keywordtype">void</span> OnDraw(CDC* pDC) { };
00059 <span class="keyword">private</span>:
00060 <span class="comment">// Internally called functions</span>
00061 <span class="keywordtype">void</span> PersistRatio(<span class="keyword">const</span> CSize &orig, CSize &dest, CPoint &remainder);
00062 <span class="keywordtype">void</span> CalcBars(<span class="keywordtype">void</span>);
00063
00064 <span class="comment">// Private member variables</span>
00065 ZoomMode_ m_zoomMode;
00066 <span class="keywordtype">bool</span> m_bCaptured;
00067 CRect m_ptDragRect;
00068 CSize m_origTotalDev; <span class="comment">// Original total size in device units</span>
00069 CSize m_origPageDev; <span class="comment">// Original per page scroll size in device units</span>
00070 CSize m_origLineDev; <span class="comment">// Original per line scroll size in device units</span>
00071 <span class="keywordtype">double</span> m_zoomScale;
00072 HCURSOR m_hZoomCursor;
00073
00074 <span class="keyword">public</span>:
00075 <span class="comment">// Generated message map functions</span>
00076 <span class="comment">//{{AFX_MSG(CZoomView)</span>
00077 afx_msg <span class="keywordtype">void</span> OnLButtonDown(UINT nFlags, CPoint point);
00078 afx_msg <span class="keywordtype">void</span> OnLButtonUp(UINT nFlags, CPoint point);
00079 afx_msg <span class="keywordtype">void</span> OnMouseMove(UINT nFlags, CPoint point);
00080 afx_msg <span class="keywordtype">void</span> OnRButtonDown(UINT nFlags, CPoint point);
00081 afx_msg BOOL OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message);
00082 <span class="comment">//}}AFX_MSG</span>
00083
00084 DECLARE_MESSAGE_MAP()
00085 };
00086 <span class="comment"></span>
00087 <span class="comment">/////////////////////////////////////////////////////////////////////////////</span>
00088 <span class="comment"></span><span class="preprocessor">#endif</span>
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