MFC-4简单的窗口重绘（非部分重绘）

#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viewm_pMainWnd->ShowWindow(SW_SHOW);//显示窗口return true;}
} a_app;//建立应用程序对象