research/transmission_spectroscopy/TOF/Win32++/tutorials/Tutorial3/View.cpp

   1 //////////////////////////////////////////////\r
   2 // View.cpp\r
   3 //  Definitions for the CView class\r
   4 \r
   5 #include "view.h"\r
   6 \r
   7 \r
   8 CView::CView()\r
   9 {\r
  10 }\r
  11 \r
  12 void CView::DrawLine(int x, int y)\r
  13 {\r
  14         CDC* pDC = GetDC();\r
  15         pDC->MoveTo(m_OldPt.x, m_OldPt.y);\r
  16         pDC->LineTo(x, y);\r
  17 }\r
  18 \r
  19 void CView::OnLButtonDown(LPARAM lParam)\r
  20 {\r
  21         // Capture mouse input.\r
  22         SetCapture();\r
  23 \r
  24         m_OldPt.x = GET_X_LPARAM(lParam);\r
  25         m_OldPt.y = GET_Y_LPARAM(lParam);\r
  26 }\r
  27 \r
  28 void CView::OnLButtonUp(LPARAM lParam)\r
  29 {\r
  30         {\r
  31                 //Release the capture on the mouse\r
  32                 ReleaseCapture();\r
  33         }\r
  34 }\r
  35 \r
  36 void CView::OnMouseMove(WPARAM wParam, LPARAM lParam)\r
  37 {\r
  38         // hold down the left mouse button and move mouse to draw lines.\r
  39         if (wParam & MK_LBUTTON)\r
  40         {\r
  41                 DrawLine(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));\r
  42                 m_OldPt.x = GET_X_LPARAM(lParam);\r
  43                 m_OldPt.y = GET_Y_LPARAM(lParam);\r
  44         }\r
  45 }\r
  46 \r
  47 LRESULT CView::WndProc(UINT uMsg, WPARAM wParam, LPARAM lParam)\r
  48 {\r
  49         switch (uMsg)\r
  50         {\r
  51         case WM_LBUTTONDOWN:\r
  52                 OnLButtonDown(lParam);\r
  53                 break;\r
  54 \r
  55         case WM_MOUSEMOVE:\r
  56                 OnMouseMove(wParam, lParam);\r
  57         break;\r
  58 \r
  59     case WM_LBUTTONUP:\r
  60                 OnLButtonUp(lParam);\r
  61                 break;\r
  62 \r
  63         case WM_DESTROY:\r
  64                 //End the program when window is destroyed\r
  65                 ::PostQuitMessage(0);\r
  66                 break;\r
  67         }\r
  68 \r
  69         //Use the default message handling for remaining messages\r
  70         return WndProcDefault(uMsg, wParam, lParam);\r
  71 }\r