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深入浅出MFC第2版(PDF格式)-第291章

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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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…………………………………………………………Page 953……………………………………………………………

                                                   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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…………………………………………………………Page 954……………………………………………………………

                    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 
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