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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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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();
#
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