windows程序设计实验指导书(5)视图-文档编程.doc

实验五、文档-视图编程实验目的：1、 了解windows MDI程序的文档模板类的作用。2、 掌握windows 程序文档-视图框架的程序设计原理。3、 知道视图的切分方法和单文档多视图的消息处理。实验要求：建立一个windows MDI（多文档）应用程序，利用视图切分实现对文档中管理的字符串和色彩数据的多种视图的不同控制。实验指导：一、 在VC+6.0环境中建立一个多文档工程。在文档中添加属性项：public:CString m_strData; / string textCOLORREF m_colorData; / color for the string text重载OnNewDocument()并添加数据初始化代码：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、 在工程中添加另外两个视图类，一个视图用于控制显示的数据项的设置，一个视图用于颜色的显示。原来已生成的视图则显示字符串。1. 利用资源编辑器添加一个如图所示的对话框资源，注意对话框的风格设为Child类型。并在此基础上利用ClassWizard生成一个基于CFormView的视图类。在视图中添加与文档相关的获取文档指针的方法，并添加控件的变量和对控件的消息映射处理。.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)/ 更新所有视图pDoc-UpdateAllViews(this);2. 添加另一个基于CView类的视图，并同样添加获取文档指针的方法和OnDraw()函数中的代码。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. 在原来工程生成的基于CView类的视图中添加OnDraw()函数中的代码用于文本的显示。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类中添加与视图切分相关的属性项和切分代码，注意包含相关头文件。.h文件/ Attributespublic:CSplitterWnd m_wndSplitter1;CSplitterWnd m_wndSplitter2;.cpp文件BOOL CChildFrame:OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext) / 静态切分if (!m_wndSplitter1.CreateStatic(this, 1, 2)TRACE0(Failed to CreateStaticSplittern);return FALSE;/创建控制视图if (!m_wndSplitter1.CreateView(0, 0,RUNTIME_CLASS(C*View),CSize(250, 100), pContext)TRACE0(Failed to create first panen);return FALSE;/对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);/字符串显示视图的创建if (!m_wndSplitter2.CreateView(0, 0,RUNTIME_CLASS(C*View), CSize(0, cyText), pContext)TRACE0(Failed to create second panen);return FALSE;/颜色显示视图的创建if (!m_wndSplitter2.CreateView(1, 0,RUNTIME_CLASS(