MFC Windows 程序设计绘制尺子Ruler

#include <afxwin.h> #include "Ruler.h" CMyApp myApp; ///////////////////////////////////////////////////////////////////////// // CMyApp member functions BOOL CMyApp::InitInstance () { m_pMainWnd = new CMainWindow; m_pMainWnd->ShowWindow (m_nCmdShow); m_pMainWnd->UpdateWindow (); return TRUE; } ///////////////////////////////////////////////////////////////////////// // CMainWindow message map and member functions BEGIN_MESSAGE_MAP (CMainWindow, CFrameWnd) ON_WM_PAINT () END_MESSAGE_MAP () CMainWindow::CMainWindow () { Create (NULL, _T ("Ruler")); } void CMainWindow::OnPaint () { CPaintDC dc (this); // // Initialize the device context. // dc.SetMapMode (MM_LOENGLISH); dc.SetTextAlign (TA_CENTER | TA_BOTTOM); dc.SetBkMode (TRANSPARENT); // // Draw the body of the ruler. // CBrush brush (RGB (255, 255, 0)); CBrush* pOldBrush = dc.SelectObject (&brush); dc.Rectangle (100, -100, 1300, -200); dc.SelectObject (pOldBrush); // // Draw the tick marks and labels. // for (int i=125; i<1300; i+=25) { dc.MoveTo (i, -192); dc.LineTo (i, -200); } for (i=150; i<1300; i+=50) { dc.MoveTo (i, -184); dc.LineTo (i, -200); } for (i=200; i<1300; i+=100) { dc.MoveTo (i, -175); dc.LineTo (i, -200); CString string; string.Format (_T ("%d"), (i / 100) - 1); dc.TextOut (i, -175, string); } }