windows程序設(shè)計實驗指導(dǎo)書(5)視圖-文檔編程.doc

實驗五、文檔-視圖編程實驗?zāi)康模?、 了解windows MDI程序的文檔模板類的作用。2、 掌握windows 程序文檔-視圖框架的程序設(shè)計原理。3、 知道視圖的切分方法和單文檔多視圖的消息處理。實驗要求：建立一個windows MDI（多文檔）應(yīng)用程序，利用視圖切分實現(xiàn)對文檔中管理的字符串和色彩數(shù)據(jù)的多種視圖的不同控制。實驗指導(dǎo)：一、 在VC+6.0環(huán)境中建立一個多文檔工程。在文檔中添加屬性項：public:CString m_strData; / string textCOLORREF m_colorData; / color for the string text重載OnNewDocument()并添加數(shù)據(jù)初始化代碼：BOOL CMultiViewDoc:OnNewDocument()if (!CDocument:OnNewDocument()return FALSE;/ TODO: add reinitialization code here/ (SDI documents will reuse this document)m_strData = Sample Data String;m_colorData = RGB(0, 0, 0);return TRUE;二、 在工程中添加另外兩個視圖類，一個視圖用于控制顯示的數(shù)據(jù)項的設(shè)置，一個視圖用于顏色的顯示。原來已生成的視圖則顯示字符串。1. 利用資源編輯器添加一個如圖所示的對話框資源，注意對話框的風(fēng)格設(shè)為Child類型。并在此基礎(chǔ)上利用ClassWizard生成一個基于CFormView的視圖類。在視圖中添加與文檔相關(guān)的獲取文檔指針的方法，并添加控件的變量和對控件的消息映射處理。.h文件public:/AFX_DATA(CControlView)enum IDD = IDD_DIALOG1 ;CStringm_str;intm_iColor;/AFX_DATApublic:C*Doc* GetDocument();/ Overrides/ ClassWizard generated virtual function overrides/AFX_VIRTUAL(CControlView)protected:virtual void DoDataExchange(CDataExchange* pDX);virtual void OnUpdate(CView* pSender, LPARAM lHint, CObject* pHint);/AFX_VIRTUAL.cpp文件C*Doc* C*View:GetDocument() / non-debug version is inlineASSERT(m_pDocument-IsKindOf(RUNTIME_CLASS(C*Doc);return (C*Doc*)m_pDocument;void C*View:OnUpdate(CView* pSender, LPARAM lHint, CObject* pHint) / TODO: Add your specialized code here and/or call the base classC*Doc* pDoc = GetDocument();ASSERT_VALID(pDoc);m_str = pDoc-m_strData;if (pDoc-m_colorData = RGB(255, 0, 0)m_iColor = 0;else if (pDoc-m_colorData = RGB(0, 255, 0)m_iColor = 1;else if (pDoc-m_colorData = RGB(0, 0, 255)m_iColor = 2;elsem_iColor = -1;UpdateData(FALSE);void C*View:OnDataChange() if (!UpdateData()return;C*Doc* pDoc = GetDocument();COLORREF color = RGB(255 * (m_iColor = 0),255 * (m_iColor = 1),255 * (m_iColor = 2);BOOL bUpdate = FALSE;if (m_str != pDoc-m_strData)pDoc-m_strData = m_str;bUpdate = TRUE;if (color != pDoc-m_colorData)pDoc-m_colorData = color;bUpdate = TRUE;if (bUpdate)/ 更新所有視圖pDoc-UpdateAllViews(this);2. 添加另一個基于CView類的視圖，并同樣添加獲取文檔指針的方法和OnDraw()函數(shù)中的代碼。void C*View:OnDraw(CDC* pDC)C*Doc* pDoc = GetDocument();ASSERT_VALID(pDoc);/ TODO: add draw code hereCRect rect;GetClientRect(rect);CBrush br(pDoc-m_colorData);pDC-FillRect(rect, &br);3. 在原來工程生成的基于CView類的視圖中添加OnDraw()函數(shù)中的代碼用于文本的顯示。void CMultiViewView:OnDraw(CDC* pDC)CMultiViewDoc* pDoc = GetDocument();ASSERT_VALID(pDoc);CRect rect;GetClientRect(rect);pDC-SetTextAlign(TA_BASELINE | TA_CENTER);pDC-SetTextColor(pDoc-m_colorData);pDC-SetBkMode(TRANSPARENT);/ center in the windowpDC-TextOut(rect.Width() / 2, rect.Height() / 2,pDoc-m_strData, pDoc-m_strData.GetLength();三、 在CChildFrame類中添加與視圖切分相關(guān)的屬性項和切分代碼，注意包含相關(guān)頭文件。.h文件/ Attributespublic:CSplitterWnd m_wndSplitter1;CSplitterWnd m_wndSplitter2;.cpp文件BOOL CChildFrame:OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext) / 靜態(tài)切分if (!m_wndSplitter1.CreateStatic(this, 1, 2)TRACE0(Failed to CreateStaticSplittern);return FALSE;/創(chuàng)建控制視圖if (!m_wndSplitter1.CreateView(0, 0,RUNTIME_CLASS(C*View),CSize(250, 100), pContext)TRACE0(Failed to create first panen);return FALSE;/對另一窗片的二次切分if (!m_wndSplitter2.CreateStatic(&m_wndSplitter1, 2, 1,WS_CHILD | WS_VISIBLE | WS_BORDER,m_wndSplitter1.IdFromRowCol(0, 1) )TRACE0(Failed to create nested splittern);return FALSE;int cyText = max(lpcs-cy - 70, 20);/字符串顯示視圖的創(chuàng)建if (!m_wndSplitter2.CreateView(0, 0,RUNTIME_CLASS(C*View), CSize(0, cyText), pContext)TRACE0(Failed to create second panen);return FALSE;/顏色顯示視圖的創(chuàng)建if (!m_wndSplitter2.CreateView(1, 0,RUNTIME_CLASS(