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深入浅出MFC第2版(PDF格式)-第117部分
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#0130 }
#0131
#0132 CStroke::CStroke(UINT nPenWidth)
#0133 {
#0134 m_nPenWidth = nPenWidth;
#0135 m_rectBounding。SetRectEmpty();
#0136 }
#0137
#0138 void CStroke::Serialize(CArchive& ar)
#0139 {
#0140 if (ar。IsStoring())
#0141 {
#0142 ar m_rectBounding;
#0149 WORD w;
#0150 ar 》》 w;
#0151 m_nPenWidth = w;
#0152 m_pointArray。Serialize(ar);
#0153 }
#0154 }
#0155
#0156 BOOL CStroke::DrawStroke(CDC* pDC)
#0157 {
#0158 CPen penStroke;
#0159 if (!penStroke。CreatePen(PS_SOLID; m_nPenWidth; RGB(0;0;0)))
#0160 return FALSE;
#0161 CPen* pOldPen = pDC…》SelectObject(&penStroke);
#0162 pDC…》MoveTo(m_pointArray'0');
#0163 for (int i=1; i 《 m_pointArray。GetSize(); i++)
#0164 {
#0165 pDC…》LineTo(m_pointArray'i');
#0166 }
#0167
#0168 pDC…》SelectObject(pOldPen);
#0169 return TRUE;
#0170 }
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附錄B Scribble Step5 完整原始碼
#0171 void CScribbleDoc::OnEditClearAll()
#0172 {
#0173 DeleteContents();
#0174 SetModifiedFlag(); // Mark the document as having been modified; for
#0175 // purposes of confirming File Close。
#0176 UpdateAllViews(NULL);
#0177 }
#0178
#0179 void CScribbleDoc::OnPenThickOrThin()
#0180 {
#0181 // Toggle the state of the pen between thin or thick。
#0182 m_bThickPen = !m_bThickPen;
#0183
#0184 // Change the current pen to reflect the new user…specified width。
#0185 ReplacePen();
#0186 }
#0187
#0188 void CScribbleDoc::ReplacePen()
#0189 {
#0190 m_nPenWidth = m_bThickPen? m_nThickWidth : m_nThinWidth;
#0191
#0192 // Change the current pen to reflect the new user…specified width。
#0193 m_penCur。DeleteObject();
#0194 m_penCur。CreatePen(PS_SOLID; m_nPenWidth; RGB(0;0;0)); // solid black
#0195 }
#0196
#0197 void CScribbleDoc::OnUpdateEditClearAll(CCmdUI* pCmdUI)
#0198 {
#0199 // Enable the mand user interface object (menu item or tool bar
#0200 // button) if the document is non…empty; i。e。; has at least one stroke。
#0201 pCmdUI…》Enable(!m_strokeList。IsEmpty());
#0202 }
#0203
#0204 void CScribbleDoc::OnUpdatePenThickOrThin(CCmdUI* pCmdUI)
#0205 {
#0206 // Add check mark to Draw Thick Line menu item; if the current
#0207 // pen width is 〃thick〃。
#0208 pCmdUI…》SetCheck(m_bThickPen);
#0209 }
#0210
#0211 void CScribbleDoc::OnPenWidths()
#0212 {
#0213 CPenWidthsDlg dlg;
#0214 // Initialize dialog data
#0215 dlg。m_nThinWidth = m_nThinWidth;
#0216 dlg。m_nThickWidth = m_nThickWidth;
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第五篇 附錄
#0217
#0218 // Invoke the dialog box
#0219 if (dlg。DoModal() == IDOK)
#0220 {
#0221 // retrieve the dialog data
#0222 m_nThinWidth = dlg。m_nThinWidth;
#0223 m_nThickWidth = dlg。m_nThickWidth;
#0224
#0225 // Update the pen that is used by views when drawing new strokes;
#0226 // to reflect the new pen width definitions for 〃thick〃 and 〃thin〃。
#0227 ReplacePen();
#0228 }
#0229 }
#0230
#0231 void CStroke::FinishStroke()
#0232 {
#0233 // Calculate the bounding rectangle。 It's needed for smart
#0234 // repainting。
#0235
#0236 if (m_pointArray。GetSize()==0)
#0237 {
#0238 m_rectBounding。SetRectEmpty();
#0239 return;
#0240 }
#0241 CPoint pt = m_pointArray'0';
#0242 m_rectBounding = CRect(pt。x; pt。y; pt。x; pt。y);
#0243
#0244 for (int i=1; i 《 m_pointArray。GetSize(); i++)
#0245 {
#0246 // If the point lies outside of the accumulated bounding
#0247 // rectangle; then inflate the bounding rect to include it。
#0248 pt = m_pointArray'i';
#0249 m_rectBounding。left = min(m_rectBounding。left; pt。x);
#0250 m_rectBounding。right = max(m_rectBounding。right; pt。x);
#0251 m_rectBounding。top = max(m_rectBounding。top; pt。y);
#0252 m_rectBounding。bottom = min(m_rectBounding。bottom; pt。y);
#0253 }
#0254
#0255 // Add the pen width to the bounding rectangle。 This is necessary
#0256 // to account for the width of the stroke when invalidating
#0257 // the screen。
#0258 m_rectBounding。InflateRect(CSize(m_nPenWidth; …(int)m_nPenWidth));
#0259 return;
#0260 }
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附錄B Scribble Step5 完整原始碼
SCRIBBLEVIEW。H
#0001 class CScribbleView : public CScrollView
#0002 {
#0003 protected: // create from serialization only
#0004 CScribbleView();
#0005 DECLARE_DYNCREATE(CScribbleView)
#0006
#0007 // Attributes
#0008 public:
#0009 CScribbleDoc* GetDocument();
#0010
#0011 protected:
#0012 CStroke* m_pStrokeCur; // the stroke in progress
#0013 CPoint m_ptPrev; // the last mouse pt in the stroke in progress
#0014
#0015 // Operations
#0016 public:
#0017
#0018 // Overrides
#0019 // ClassWizard generated virtual function overrides
#0020 //{{AFX_VIRTUAL(CScribbleView)
#0021 public:
#0022 virtual void OnDraw(CDC* pDC); // overridden to draw this view
#0023 virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
#0024 virtual void OnInitialUpdate();
#0025 protected:
#0026 virtual BOOL OnPreparePrinting(CPrintInfo* pInfo);
#0027 virtual void OnBeginPrinting(CDC* pDC; CPrintInfo* pInfo);
#0028 virtual void OnEndPrinting(CDC* pDC; CPrintInfo* pInfo);
#0029 virtual void OnUpdate(CView* pSender; LPARAM lHint; CObject* pHint);
#0030 virtual void OnPrint(CDC* pDC; CPrintInfo* pInfo);
#0031 //}}AFX_VIRTUAL
#0032
#0033 // Implementation
#0034 public:
#0035 void PrintTitlePage(CDC* pDC; CPrintInfo* pInfo);
#0036 void PrintPageHeader(CDC* pDC; CPrintInfo* pInfo; CString& strHeader);
#0037 virtual ~CScribbleView();
#0038 #ifdef _DEBUG
#0039 virtual void AssertValid() const;
#0040 virtual void Dump(CDumpContext& dc) const;
#0041 #endif
#0042
#0043 protected:
#0044
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第五篇 附錄
#0045 // Generated message map functions
#0046 protected:
#0047 //{{AFX_MSG(CScribbleView)
#0048 afx_msg void OnLButtonDown(UINT nFlags; CPoint point);
#0049 afx_msg void OnLButtonUp(UINT nFlags; CPoint point);
#0050 afx_msg void OnMouseMove(UINT nFlags; CPoint point);
#0051 //}}AFX_MSG
#0052 DECLARE_MESSAGE_MAP()
#0053 };
#0054
#0055 #ifndef _DEBUG // debug version in ScribVw。cpp
#0056 inline CScribbleDoc* CScribbleView::GetDocument()
#0057 { return (CScribbleDoc*)m_pDocument; }
#0058 #endif
SCRIBBLEVIEW。CPP
#0001 #include 〃stdafx。h〃
#0002 #include 〃Scribble。h〃
#0003
#0004 #include 〃ScribDoc。h〃
#0005 #include 〃ScribVw。h〃
#0006
#0007 #ifdef _DEBUG
#0008 #define new DEBUG_NEW
#0009 #undef THIS_FILE
#0010 static char THIS_FILE'' = __FILE__;
#0011 #endif
#0012
#0013 /////////////////////////////////////////////////////////////////
#0014 // CScribbleView
#0015
#0016 IMPLEMENT_DYNCREATE(CScribbleView; CScrollView)
#0017
#0018 BEGIN_MESSAGE_MAP(CScribbleView; CScrollView)
#0019 //{{AFX_MSG_MAP(CScribbleView)
#0020 ON_WM_LBUTTONDOWN()
#0021 ON_WM_LBUTTONUP()
#0022 ON_WM_MOUSEMOVE()
#0023 //}}AFX_MSG_MAP
#0024 // Standard printing mands
#0025 ON_MAND(ID_FILE_PRINT; CView::OnFilePrint)
#0026 ON_MAND(ID_FILE_PRINT_DIRECT; CView::OnFilePrint)
#0027 ON_MAND(ID_FILE_PRINT_PREVIEW; CView::OnFilePrintPreview)
#0028 END_MESSAGE_MAP()
#0029
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附錄B Scribble Step5 完整原始碼
#0030 /////////////////////////////////////////////////////////////////
#0031 // CScribbleView construction/destruction
#0032
#0033 CScribbleView::CScribbleView()
#0034 {
#0035 // TODO: add construction code here
#0036
#0037 }
#0038
#0039 CScribbleView::~CScribbleView()
#0040 {
#0041 }
#0042
#0043 BOOL CScribbleView::PreCreateWindow(CREATESTRUCT& cs)
#0044 {
#0045 // TODO: Modify the Window class or styles here by modifying
#0046 // the CREATESTRUCT cs
#0047
#0048 return CView::PreCreateWindow(cs);
#0049 }
#0050
#0051 ////////////////////////////////////////////////////////////////
#0052 // CScribbleView drawing
#0053
#0054 void CScribbleView::OnDraw(CDC* pDC)
#0055 {
#0056 CScribbleDoc* pDoc = GetDocument();
#0057 ASSERT_VALID(pDoc);
#0058
#0059 // Get the invalidated rectangle of the view; or in the case
#0060 // of printing; the clipping region of the printer dc。
#0061 CRect rectClip;
#0062 CRect rectStroke;
#0063 pDC…》GetClipBox(&rectClip);
#0064 pDC…》LPtoDP(&rectClip);
#0065 rectClip。InflateRect(1; 1); // avoid rounding to nothing
#0066
#0067 // Note: CScrollView::OnPaint() will have already adjusted the
#0068 // viewport origin before calling OnDraw(); to reflect the
#0069 // currently scrolled position。
#0070
#0071 // The view delegates the drawing of individual strokes to
#0072 // CStroke::DrawStroke()。
#0073 CTypedPtrList& strokeList = pDoc…》m_strokeList;
#0074 POSITION pos = strokeList。GetHeadPosition();
#0075 while (pos != NULL)
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第五篇 附錄
#0076 {
#0077 CStroke* pStroke = strokeList。GetNext(pos);
#0078 rectStroke = pStroke…》GetBoundingRect();
#0079 pDC…》LPtoDP(&rectStroke);
#0080 rectStroke。InflateRect(1; 1); // avoid rounding to nothing
#0081 if (!rectStroke。IntersectRect(&rectStroke; &rectClip))
#0082 continue;
#0083 pStroke…》DrawStroke(pDC);
#0084 }
#0085 }
#0086
#0087 /////////////////////////////////////////////////////////////////
#0088 // CScribbleView printing
#0089
#0090 BOOL CScribbleView::OnPreparePrinting(CPrintInfo* pInfo)
#0091 {
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