C++ MFC 做个时钟显示软件.doc

现在以最短的时间带领大家进行一个C+ MFC做的时钟软件，下面分几步叙述，相信大家看完本期实验，自己也能独立做个这样的软件第一启动Visual C+ 6.0，创建一个单文档应用程序，工程名为Clock。第二 打开ClassWizard对话框为CClockView类添加WM_TIMER和WM_CREAT消息函数代码如下。void CClockView:OnTimer(UINT nIDEvent) / TODO: Add your message handler code here and/or call defaultInvalidateRect(NULL,true);UpdateWindow();CView:OnTimer(nIDEvent);int CClockView:OnCreate(LPCREATESTRUCT lpCreateStruct) if (CView:OnCreate(lpCreateStruct) = -1)return -1;/ TODO: Add your specialized creation code hereSetTimer(1,1000,NULL);return 0;我们现在分别添加，截图如下第三打开ClockView.cpp文件添加头文件，调用数学函数库。在其他函数中添加代码。#include math.h截图如下第四在其他函数中添加代码。代码如下void CClockView:OnDraw(CDC* pDC)CClockDoc* pDoc = GetDocument();ASSERT_VALID(pDoc);/ TODO: add draw code for native data here/获取客户区大小RECT Rect;GetClientRect(&Rect);/计算椭圆中心位置int CenterX = Rect.right/2;/区域最右边的一半int CenterY = Rect.bottom/2;/区域最下边的一半CTime Time= CTime:GetCurrentTime();/取当前时间CString str;int i,x,y;CSize size;/创建一支黑色的笔CPen Pen(PS_SOLID,5,RGB(0,0,0);/选进设备表，保存原笔CPen *OldPen = pDC-SelectObject(&Pen);/绘制钟面椭圆pDC-Ellipse(5,5,Rect.right-5,Rect.bottom-5);double Radians;/设置字体颜色为红色pDC-SetTextColor(RGB(255,0,0);for(i = 1;i GetTextExtent (str,str.GetLength();/计算时间点放置的位置Radians = (double)i*6.28/12.0; x=CenterX-(size.cx/2)+(int)(double)(CenterX-0)*sin(Radians);y=CenterY-(size.cy/2)-(int)(double)(CenterY-20)*cos(Radians);/绘制12个时间点（1-12）pDC-TextOut(x,y,str);/计算时钟指针的夹角Radians = (double)Time.GetHour() + (double)Time.GetMinute()/60.0 +(double)Time.GetSecond()/3600.0;Radians *= 6.28/12.0;/创建时钟指针画笔CPen HourPen(PS_SOLID,5,RGB(0,255,0);pDC-SelectObject(&HourPen);/绘制时钟指针线pDC-MoveTo(CenterX,CenterY);pDC-LineTo(CenterX + (int)(double)(CenterX/3)*sin(Radians),CenterY - (int)(double)(CenterY/3)*cos(Radians);Radians = (double)Time.GetMinute()+(double)Time.GetSecond()/60.0;Radians *= 6.28/60.0;/创建分钟指针画笔CPen MinutePen(PS_SOLID,3,RGB(0,0,255);pDC-SelectObject(&MinutePen);/绘制分钟指针线pDC-MoveTo(CenterX,CenterY);pDC-LineTo(CenterX + (int)(double)(CenterX*2)/3)*sin(Radians),CenterY - (int)(double)(CenterY*2/3)*cos(Radians);Radians = (double)Time.GetSecond();Radians *= 6.28/60.0;/创建秒钟指针画笔CPen SecondPen(PS_SOLID,1,RGB(255,0,255);pDC-SelectObject(&SecondPen);/绘制秒钟指针线pDC-MoveTo(CenterX,CenterY);pDC-LineTo(CenterX + (int)(double)(CenterX*4)/5)*sin(Radians),CenterY - (int