research/transmission_spectroscopy/TOF/Win32++/tutorials/Tutorial4/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         CClientDC dcClient(this);\r
  15         dcClient.MoveTo(m_points.back().x, m_points.back().y);\r
  16         dcClient.LineTo(x, y);\r
  17 }\r
  18 \r
  19 void CView::OnDraw(CDC* pDC)\r
  20 {\r
  21         if (m_points.size() > 0)\r
  22         {\r
  23                 bool bDraw = false;  //Start with the pen up\r
  24 \r
  25                 for (unsigned int i = 0 ; i < m_points.size(); i++)\r
  26                 {\r
  27                         if (bDraw) pDC->LineTo(m_points[i].x, m_points[i].y);\r
  28                         else pDC->MoveTo(m_points[i].x, m_points[i].y);\r
  29                         bDraw = m_points[i].PenDown;\r
  30                 }\r
  31         }\r
  32 }\r
  33 \r
  34 void CView::StorePoint(int x, int y, bool PenDown)\r
  35 {\r
  36         PlotPoint P1;\r
  37         P1.x = x;\r
  38         P1.y = y;\r
  39         P1.PenDown = PenDown;\r
  40 \r
  41         m_points.push_back(P1); //Add the point to the vector\r
  42 }\r
  43 \r
  44 void CView::OnLButtonDown(LPARAM lParam)\r
  45 {\r
  46         // Capture mouse input.\r
  47         SetCapture();\r
  48 \r
  49         StorePoint(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), true);\r
  50 }\r
  51 \r
  52 void CView::OnLButtonUp(LPARAM lParam)\r
  53 {\r
  54         {\r
  55                 //Release the capture on the mouse\r
  56                 ReleaseCapture();\r
  57 \r
  58                 StorePoint(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), false);\r
  59         }\r
  60 }\r
  61 \r
  62 void CView::OnMouseMove(WPARAM wParam, LPARAM lParam)\r
  63 {\r
  64         // hold down the left mouse button and move mouse to draw lines.\r
  65         if ( (wParam & MK_LBUTTON) && (GetCapture() == this) )\r
  66         {\r
  67                 DrawLine(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));\r
  68                 StorePoint(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), true);\r
  69         }\r
  70 }\r
  71 \r
  72 LRESULT CView::WndProc(UINT uMsg, WPARAM wParam, LPARAM lParam)\r
  73 {\r
  74         switch (uMsg)\r
  75         {\r
  76         case WM_LBUTTONDOWN:\r
  77                 OnLButtonDown(lParam);\r
  78                 break;\r
  79 \r
  80         case WM_MOUSEMOVE:\r
  81                 OnMouseMove(wParam, lParam);\r
  82         break;\r
  83 \r
  84     case WM_LBUTTONUP:\r
  85                 OnLButtonUp(lParam);\r
  86                 break;\r
  87 \r
  88         case WM_DESTROY:\r
  89                 //End the program when window is destroyed\r
  90                 ::PostQuitMessage(0);\r
  91                 break;\r
  92         }\r
  93 \r
  94         //Use the default message handling for remaining messages\r
  95         return WndProcDefault(uMsg, wParam, lParam);\r
  96 }\r
  97 \r