research/transmission_spectroscopy/TOF/Win32++/tutorials/Tutorial6/View.cpp

   1 //////////////////////////////////////////////\r
   2 // View.cpp\r
   3 //  Definitions for the CView class\r
   4 \r
   5 #include "view.h"\r
   6 #include "resource.h"\r
   7 \r
   8 \r
   9 CView::CView()\r
  10 {\r
  11         m_Brush.CreateSolidBrush(RGB(255,255,230));\r
  12 }\r
  13 \r
  14 CView::~CView()\r
  15 {\r
  16 }\r
  17 \r
  18 void CView::DrawLine(int x, int y)\r
  19 {\r
  20         CClientDC dcClient(this);\r
  21         dcClient.MoveTo(m_points.back().x, m_points.back().y);\r
  22         dcClient.LineTo(x, y);\r
  23 }\r
  24 \r
  25 void CView::OnDraw(CDC* pDC)\r
  26 {\r
  27         if (m_points.size() > 0)\r
  28         {\r
  29                 bool bDraw = false;  //Start with the pen up\r
  30 \r
  31                 for (unsigned int i = 0 ; i < m_points.size(); i++)\r
  32                 {\r
  33                         if (bDraw) pDC->LineTo(m_points[i].x, m_points[i].y);\r
  34                         else pDC->MoveTo(m_points[i].x, m_points[i].y);\r
  35                         bDraw = m_points[i].PenDown;\r
  36                 }\r
  37         }\r
  38 }\r
  39 \r
  40 void CView::PreCreate(CREATESTRUCT &cs)\r
  41 {\r
  42         // Set the extra style to provide a sunken edge\r
  43         cs.dwExStyle = WS_EX_CLIENTEDGE;\r
  44 }\r
  45 \r
  46 void CView::PreRegisterClass(WNDCLASS &wc)\r
  47 {\r
  48         // Set the background brush and cursor\r
  49         wc.hbrBackground = m_Brush;\r
  50         wc.lpszClassName = _T("Scribble Window");\r
  51         wc.hCursor = ::LoadCursor(GetApp()->GetInstanceHandle(), MAKEINTRESOURCE(IDC_CURSOR1));\r
  52 }\r
  53 \r
  54 void CView::StorePoint(int x, int y, bool PenDown)\r
  55 {\r
  56         PlotPoint P1;\r
  57         P1.x = x;\r
  58         P1.y = y;\r
  59         P1.PenDown = PenDown;\r
  60 \r
  61         m_points.push_back(P1); //Add the point to the vector\r
  62 }\r
  63 \r
  64 void CView::OnLButtonDown(LPARAM lParam)\r
  65 {\r
  66         // Capture mouse input.\r
  67         SetCapture();\r
  68 \r
  69         StorePoint(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), true);\r
  70 }\r
  71 \r
  72 void CView::OnLButtonUp(LPARAM lParam)\r
  73 {\r
  74         {\r
  75                 //Release the capture on the mouse\r
  76                 ReleaseCapture();\r
  77 \r
  78                 StorePoint(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), false);\r
  79         }\r
  80 }\r
  81 \r
  82 void CView::OnMouseMove(WPARAM wParam, LPARAM lParam)\r
  83 {\r
  84         // hold down the left mouse button and move mouse to draw lines.\r
  85         if ( (wParam & MK_LBUTTON) && (GetCapture() == this) )\r
  86         {\r
  87                 DrawLine(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));\r
  88                 StorePoint(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), true);\r
  89         }\r
  90 }\r
  91 \r
  92 LRESULT CView::WndProc(UINT uMsg, WPARAM wParam, LPARAM lParam)\r
  93 {\r
  94         switch (uMsg)\r
  95         {\r
  96         case WM_LBUTTONDOWN:\r
  97                 OnLButtonDown(lParam);\r
  98                 break;\r
  99 \r
 100         case WM_MOUSEMOVE:\r
 101                 OnMouseMove(wParam, lParam);\r
 102         break;\r
 103 \r
 104     case WM_LBUTTONUP:\r
 105                 OnLButtonUp(lParam);\r
 106                 break;\r
 107         }\r
 108 \r
 109         //Use the default message handling for remaining messages\r
 110         return WndProcDefault(uMsg, wParam, lParam);\r
 111 }\r
 112 \r
 113 \r