MFC-4简单的窗口重绘（非部分重绘）

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#include <afxwin.h>

#include "resource.h"

#include <afxtempl.h>   //定义模板类的头文件

 

class MyDocument : public CDocument

{

public:

    CArray<CPoint,CPoint &> pArray;//<保存的数据类型,读取保存数据类型的返回值>

    void AddPoint(CPoint p)

    {

        pArray.Add(p);

    }

    CPoint GetPoint(int i)

    {

        return pArray[i];

    }

    int GetSize()

    {

        return pArray.GetSize();

    }

    DECLARE_DYNCREATE(MyDocument)//声明run-time类

    DECLARE_MESSAGE_MAP()

};

 

IMPLEMENT_DYNCREATE(MyDocument,CDocument)//声明MyDocument为run-time类

BEGIN_MESSAGE_MAP(MyDocument,CDocument)

END_MESSAGE_MAP();

 

class MyView : public CView

{

public:

    void OnDraw(CDC * aDC)//必须重载的虚函数，重绘函数

    {

        MyDocument *doc = (MyDocument *)GetDocument();//取得当前Document的指针

        int num = doc->GetSize();

        int i;

        for(i=0;i<num;++i)

        {

            CPoint point = doc->GetPoint(i);

            aDC->SetPixel(point,RGB(255,0,0));

        }

    }

 

    afx_msg void OnLButtonDown(UINT,CPoint point)

    {

        SetCapture();//取得鼠标消息的接收权

    }

 

    afx_msg void OnMouseMove(UINT,CPoint point)

    {

        if(this == GetCapture())

        {

            CClientDC aDC(this);//建立画布

            aDC.SetPixel(point,RGB(255,0,0));

            MyDocument *doc = (MyDocument *)GetDocument();

            doc->AddPoint(point);

        }

    }

 

    afx_msg void OnLButtonUp(UINT,CPoint point)

    {

        ::ReleaseCapture();

    }

 

    DECLARE_MESSAGE_MAP()

    DECLARE_DYNCREATE(MyView)//声明为run-time类

};

 

BEGIN_MESSAGE_MAP(MyView,CView)

    ON_WM_LBUTTONDOWN()

    ON_WM_MOUSEMOVE()

    ON_WM_LBUTTONUP()

END_MESSAGE_MAP()

 

IMPLEMENT_DYNCREATE(MyView,CView)//声明MyView为run-time类

 

class MyFrame:public CFrameWnd

{

    DECLARE_DYNCREATE(MyFrame)//声明run-time类

    DECLARE_MESSAGE_MAP()

};

 

BEGIN_MESSAGE_MAP(MyFrame,CFrameWnd)

END_MESSAGE_MAP()

 

IMPLEMENT_DYNCREATE(MyFrame,CFrameWnd)//声明MyFrame为run-time类

      

class MyApp:public CWinApp

{

public:

    BOOL InitInstance()

    {

        CDocument *doc;//指向文件的指针

        CSingleDocTemplate * DocTemplate;//文件指向单文档模板对象的指针

        DocTemplate = new CSingleDocTemplate(

            IDR_MENU1,//用于单文档框架之资源标志符

            RUNTIME_CLASS(MyDocument),//单文档窗口的Document类

            RUNTIME_CLASS(MyFrame),//单文档窗口的窗口框架类

            RUNTIME_CLASS(MyView)//单文档窗口的View类

            );//建立单文档模板对象

 

        AddDocTemplate(DocTemplate);//将单文档模板对象设置给MyApp;

 

        doc = DocTemplate->CreateNewDocument();//建立一个新的文档

 

        m_pMainWnd = DocTemplate->CreateNewFrame(doc,NULL);//建立一个窗口框架

 

        DocTemplate->InitialUpdateFrame((CFrameWnd*)m_pMainWnd,doc);//初始化窗口框架并连接view

 

        m_pMainWnd->ShowWindow(SW_SHOW);//显示窗口

        return true;

    }

} a_app;//建立应用程序对象