指针式时钟

// B04View.cpp : implementation of the CB04View class // #include "stdafx.h" #include "B04.h" #include "math.h" #include "B04Doc.h" #include "B04View.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CB04View IMPLEMENT_DYNCREATE(CB04View, CView) BEGIN_MESSAGE_MAP(CB04View, CView) //{{AFX_MSG_MAP(CB04View) ON_WM_CREATE() ON_WM_TIMER() //}}AFX_MSG_MAP // Standard printing commands 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() ///////////////////////////////////////////////////////////////////////////// // CB04View construction/destruction CB04View::CB04View() { // TODO: add construction code here } CB04View::~CB04View() { } BOOL CB04View::PreCreateWindow(CREATESTRUCT& cs) { // TODO: Modify the Window class or styles here by modifying // the CREATESTRUCT cs return CView::PreCreateWindow(cs); } ///////////////////////////////////////////////////////////////////////////// // CB04View drawing void CB04View::OnDraw(CDC* pDC) { CB04Doc* pDoc = GetDocument(); ASSERT_VALID(pDoc); // TODO: add draw code for native data here //获取客户区 RECT Rect; GetClientRect(&Rect); //计算椭圆中心位置 int CenterX = Rect.right/2; int CenterY = Rect.bottom/2; //取当前时间 CTime Time = CTime::GetCurrentTime(); CString str; int i,x,y; CSize size; //创建一支黄色的笔,用来画椭圆 CPen Pen(PS_SOLID,5,RGB(255,255,0)); //设置当前画笔,并记下以前的画笔 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 <= 12;i++){ //格式化钟点值 str.Format("%d",i); size = pDC->GetTextExtent(str,str.GetLength()); Radians = (double)i*6.28/12.0; //计算钟点放置的位置 x = CenterX - (size.cx/2) + (int)((double)(CenterX - 20)* sin(Radians)); y = CenterY - (size.cy/2) - (int)((double)(CenterY - 20)* cos(Radians)); //绘制钟点 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 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 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(0,255,255)); pDC->SelectObject(&SecondPen); //绘制秒钟指针 pDC->MoveTo(CenterX,CenterY); pDC->LineTo(CenterX + (int)((double)(CenterX*4)/5)*sin(Radians), CenterY - (int)((double)(CenterY*4)/5*cos(Radians))); pDC->SelectObject(OldPen); } ///////////////////////////////////////////////////////////////////////////// // CB04View printing BOOL CB04View::OnPreparePrinting(CPrintInfo* pInfo) { // default preparation return DoPreparePrinting(pInfo); } void CB04View::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { // TODO: add extra initialization before printing } void CB04View::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { // TODO: add cleanup after printing } ///////////////////////////////////////////////////////////////////////////// // CB04View diagnostics #ifdef _DEBUG void CB04View::AssertValid() const { CView::AssertValid(); } void CB04View::Dump(CDumpContext& dc) const { CView::Dump(dc); } CB04Doc* CB04View::GetDocument() // non-debug version is inline { ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CB04Doc))); return (CB04Doc*)m_pDocument; } #endif //_DEBUG ///////////////////////////////////////////////////////////////////////////// // CB04View message handlers int CB04View::OnCreate(LPCREATESTRUCT lpCreateStruct) { if (CView::OnCreate(lpCreateStruct) == -1) return -1; // TODO: Add your specialized creation code here SetTimer(1,1000,NULL); return 0; } void CB04View::OnTimer(UINT nIDEvent) { // TODO: Add your message handler code here and/or call default InvalidateRect(NULL,true); UpdateWindow(); CView::OnTimer(nIDEvent); }