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深入浅出MFC第2版(PDF格式)-第159部分

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#0081  // CScribbleDoc mands 

#0082 

#0083  BOOL CScribbleDoc::OnOpenDocument(LPCTSTR lpszPathName) 

#0084  { 

#0085          if (!CDocument::OnOpenDocument(lpszPathName)) 

#0086                  return FALSE; 

#0087          InitDocument(); 

#0088          return TRUE; 

#0089  } 

#0090 

#0091  void CScribbleDoc::DeleteContents() 

#0092  { 

#0093          while (!m_strokeList。IsEmpty()) 

#0094          { 

#0095                  delete m_strokeList。RemoveHead(); 

#0096          } 

#0097          CDocument::DeleteContents(); 

#0098  } 

#0099 

#0100  void CScribbleDoc::InitDocument() 

#0101  { 

#0102          m_bThickPen = FALSE; 

#0103          m_nThinWidth = 2;   // default thin pen is 2 pixels wide 

#0104          m_nThickWidth = 5;  // default thick pen is 5 pixels wide 

#0105          ReplacePen();      // initialize pen according to current width 

#0106 

#0107          // default document size is 800 x 900 screen pixels 

#0108          m_sizeDoc = CSize(800;900); 

#0109  } 

#0110 

#0111  CStroke* CScribbleDoc::NewStroke() 

#0112  { 

#0113          CStroke* pStrokeItem = new CStroke(m_nPenWidth); 

#0114          m_strokeList。AddTail(pStrokeItem); 

#0115          SetModifiedFlag();  // Mark the document as having been modified; for 

#0116                                 // purposes of confirming File Close。 

#0117          return pStrokeItem; 

#0118  } 

#0119 

#0120 

#0121 

#0122 

#0123  ///////////////////////////////////////////////////////////////// 

#0124  // CStroke 



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                   第五篇    附錄  



                   #0125 

                   #0126  IMPLEMENT_SERIAL(CStroke; CObject; 2) 

                   #0127  CStroke::CStroke() 

                   #0128  { 

                   #0129          // This empty constructor should be used by serialization only 

                   #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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                    #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(); 

#
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