实验八MFC鼠标作图编程实验

实验八MFC鼠标作图编程实验电气1002班 李震 学号10053212实验目的熟悉VisualC++6.0开发环境；掌握应用MFC类库编写鼠标绘图程序的方法；掌握MFC环境中绘图函数的使用方法。实验内容创建一个单文档应用程序，实现鼠标的绘图功能。要求：创建一个工具栏，有线段、矩形、椭圆三个按钮；绘图前，选择工具栏上的按钮，确定图形的形状。按下鼠标左键，开始绘图，结合鼠标光标的坐标值，来确定图形的形状和大小，并随着鼠标的移动在屏幕上实时绘制图形，放开鼠标左键，确定最后的图形，绘制在屏幕上。程序清单//DemoView.cpp:implementationoftheCDemoViewclass#include"stdafx.h"#include"Demo.h"#include"DemoDoc.h"#include"DemoView.h"#ifdef_DEBUG#definenewDEBUG_NEW#undefTHIS_FILEstaticcharTHIS_FILE[]=__FILE__;#endif///////////////////////////////////////////////////////////////////////////////CDemoViewIMPLEMENT_DYNCREATE(CDemoView,CView)BEGIN_MESSAGE_MAP(CDemoView,CView) //{{AFX_MSG_MAP(CDemoView) ON_WM_LBUTTONDOWN() ON_WM_MOUSEMOVE() ON_WM_LBUTTONUP() ON_COMMAND(ID_FILEOP_OPEN,OnFileopOpen) ON_UPDATE_COMMAND_UI(ID_FILEOP_OPEN,OnUpdateFileopOpen) ON_COMMAND(ID_FILEOP_SAVE,OnFileopSave) ON_UPDATE_COMMAND_UI(ID_FILEOP_SAVE,OnUpdateFileopSave) //}}AFX_MSG_MAP //Standardprintingcommands ON_COMMAND_RANGE(ID_DRAW_LINE,ID_DRAW_ELLIPSE,OnDrawType) ON_UPDATE_COMMAND_UI_RANGE(ID_DRAW_LINE,ID_DRAW_ELLIPSE,OnDrawTypeUI) ON_COMMAND(ID_FILE_PRINT,CView::OnFilePrint) ON_COMMAND(ID_FILE_PRINT_DIRECT,CView::OnFilePrint) ON_COMMAND(ID_FILE_PRINT_PREVIEW,CView::OnFilePrintPreview)END_MESSAGE_MAP()///////////////////////////////////////////////////////////////////////////////CDemoViewconstruction/destructionCDemoView::CDemoView(){ //TODO:addconstructioncodehere m_nPicNum=0; m_nDrawType=0;}CDemoView::~CDemoView(){}BOOLCDemoView::PreCreateWindow(CREATESTRUCT&cs){ //TODO:ModifytheWindowclassorstylesherebymodifying //theCREATESTRUCTcs returnCView::PreCreateWindow(cs);}///////////////////////////////////////////////////////////////////////////////CDemoViewdrawingvoidCDemoView::OnDraw(CDC*pDC){ CDemoDoc*pDoc=GetDocument(); ASSERT_VALID(pDoc); //TODO:adddrawcodefornativedatahere CPenBluePen,*pOldPen; BluePen.CreatePen(PS_SOLID,3,RGB(0,0,255)); pOldPen=pDC->SelectObject(&BluePen); for(inti=0;i<m_nPicNum;i++) { switch(m_Pic[i].m_nDrawType) { case0: pDC->MoveTo(m_Pic[i].m_nX0,m_Pic[i].m_nY0); pDC->LineTo(m_Pic[i].m_nX1,m_Pic[i].m_nY1); break; case1: pDC->Rectangle(m_Pic[i].m_nX0,m_Pic[i].m_nY0, m_Pic[i].m_nX1,m_Pic[i].m_nY1); break; case2: pDC->Ellipse(m_Pic[i].m_nX0,m_Pic[i].m_nY0, m_Pic[i].m_nX1,m_Pic[i].m_nY1); break; } } pDC->SelectObject(pOldPen);}///////////////////////////////////////////////////////////////////////////////CDemoViewprintingBOOLCDemoView::OnPreparePrinting(CPrintInfo*pInfo){ //defaultpreparation returnDoPreparePrinting(pInfo);}voidCDemoView::OnBeginPrinting(CDC*/*pDC*/,CPrintInfo*/*pInfo*/){ //TODO:addextrainitializationbeforeprinting}voidCDemoView::OnEndPrinting(CDC*/*pDC*/,CPrintInfo*/*pInfo*/){ //TODO:addcleanupafterprinting}///////////////////////////////////////////////////////////////////////////////CDemoViewdiagnostics#ifdef_DEBUGvoidCDemoView::AssertValid()const{ CView::AssertValid();}voidCDemoView::Dump(CDumpContext&dc)const{ CView::Dump(dc);}CDemoDoc*CDemoView::GetDocument()//non-debugversionisinline{ ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CDemoDoc))); return(CDemoDoc*)m_pDocument;}#endif//_DEBUG///////////////////////////////////////////////////////////////////////////////CDemoViewmessagehandlersvoidCDemoView::OnLButtonDown(UINTnFlags,CPointpoint){ //TODO:Addyourmessagehandlercodehereand/orcalldefault m_nX0=m_nX1=point.x; m_nY0=m_nY1=point.y; CView::OnLButtonDown(nFlags,point);}voidCDemoView::OnMouseMove(UINTnFlags,CPointpoint){ //TODO:Addyourmessagehandlercodehereand/orcalldefault CClientDCdc(this); CPenWhitePen,RedPen,*pOldPen; WhitePen.CreatePen(PS_SOLID,1,RGB(255,255,255)); RedPen.CreatePen(PS_DASH,1,RGB(255,0,0)); if(nFlags&MK_LBUTTON) { switch(m_nDrawType) { case0: pOldPen=dc.SelectObject(&WhitePen); dc.MoveTo(m_nX0,m_nY0); dc.LineTo(m_nX1,m_nY1); m_nX1=point.x; m_nY1=point.y; dc.SelectObject(&RedPen); dc.MoveTo(m_nX0,m_nY0); dc.LineTo(m_nX1,m_nY1); dc.SelectObject(pOldPen); break; case1: pOldPen=dc.SelectObject(&WhitePen); dc.Rectangle(m_nX0,m_nY0,m_nX1,m_nY1); m_nX1=point.x; m_nY1=point.y; dc.SelectObject(&RedPen); dc.Rectangle(m_nX0,m_nY0,m_nX1,m_nY1); dc.SelectObject(pOldPen); break; case2: pOldPen=dc.SelectObject(&WhitePen); dc.Ellipse(m_nX0,m_nY0,m_nX1,m_nY1); m_nX1=point.x; m_nY1=point.y; dc.SelectObject(&RedPen); dc.Ellipse(m_nX0,m_nY0,m_nX1,m_nY1); dc.SelectObject(pOldPen); break; } } CView::OnMouseMove(nFlags,point);}voidCDemoView::OnLButtonUp(UINTnFlags,CPointpoint){ //TODO:Addyourmessagehandlercodehereand/orcalldefault CClientDCdc(this); CPenWhitePen,BluePen,*pOldPen; WhitePen.CreatePen(PS_SOLID,1,RGB(255,255,255)); BluePen.CreatePen(PS_SOLID,3,RGB(0,0,255)); switch(m_nDrawType) { case0: pOldPen=dc.SelectObject(&WhitePen); dc.MoveTo(m_nX0,m_nY0); dc.LineTo(m_nX1,m_nY1); m_nX1=point.x; m_nY1=point.y; dc.SelectObject(&BluePen); dc.MoveTo(m_nX0,m_nY0); dc.LineTo(m_nX1,m_nY1); dc.SelectObject(pOldPen); break; case1: pOldPen=dc.SelectObject(&WhitePen); dc.Rectangle(m_nX0,m_nY0,m_nX1,m_nY1); m_nX1=point.x; m_nY1=point.y; dc.SelectObject(&BluePen); dc.Rectangle(m_nX0,m_nY0,m_nX1,m_nY1); dc.SelectObject(pOldPen); break; case2: pOldPen=dc.SelectObject(&WhitePen); dc.Ellipse(m_nX0,m_nY0,m_nX1,m_nY1); m_nX1=point.x; m_nY1=point.y; dc.SelectObject(&BluePen); dc.Ellipse(m_nX0,m_nY0,m_nX1,m_nY1); dc.SelectObject(pOldPen); break; } m_Pic[m_nPicNum].m_nDrawType=m_nDrawType; m_Pic[m_nPicNum].m_nX0=m_nX0; m_Pic[m_nPicNum].m_nY0=m_nY0; m_Pic[m_nPicNum].m_nX1=m_nX1; m_Pic[m_nPicNum].m_nY1=m_nY1; m_nPicNum++; CView::OnLButtonUp(nFlags,point);}voidCDemoView::OnFileopOpen(){ //TODO:Addyourcommandhandlercodehere CFileDialogdlg(TRUE); if(dlg.DoModal()==IDOK) { CStringszPathName; szPathName=dlg.GetPathName(); CFilefile(szPathName,CFile::modeRead); file.Read(&m_nPicNum,sizeof(int)); for(inti=0;i<m_nPicNum;i++) { file.Read(&m_Pic[i],sizeof(CPic)); } file.Close(); Invalidate(); }}voidCDemoView::OnUpdateFileopOpen(CCmdUI*pCmdUI){ //TODO:AddyourcommandupdateUIhandlercodehere}voidCDemoView::OnFileopSave(){ //TODO:Addyourcommandhandlercodehere CFileDialogdlg(FALSE)