research/transmission_spectroscopy/TOF/Win32++/tutorials/Tutorial7/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() : m_PenColor(RGB(0,0,0))\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.CreatePen(PS_SOLID, 1, m_points.back().color);\r
  22         dcClient.MoveTo(m_points.back().x, m_points.back().y);\r
  23         dcClient.LineTo(x, y);\r
  24 }\r
  25 \r
  26 void CView::OnDraw(CDC* pDC)\r
  27 {\r
  28         if (m_points.size() > 0)\r
  29         {\r
  30                 bool bDraw = false;  //Start with the pen up\r
  31                 for (unsigned int i = 0 ; i < m_points.size(); i++)\r
  32                 {\r
  33                         pDC->CreatePen(PS_SOLID, 1, m_points[i].color);\r
  34                         if (bDraw)\r
  35                                 pDC->LineTo(m_points[i].x, m_points[i].y);\r
  36                         else\r
  37                                 pDC->MoveTo(m_points[i].x, m_points[i].y);\r
  38                         \r
  39                         bDraw = m_points[i].PenDown;\r
  40                 }\r
  41         }\r
  42 }\r
  43 \r
  44 void CView::PreCreate(CREATESTRUCT &cs)\r
  45 {\r
  46         // Set the extra style to provide a sunken edge\r
  47         cs.dwExStyle = WS_EX_CLIENTEDGE;\r
  48 }\r
  49 \r
  50 void CView::PreRegisterClass(WNDCLASS &wc)\r
  51 {\r
  52         // Set the background brush and cursor\r
  53         wc.hbrBackground = m_Brush;\r
  54         wc.lpszClassName = _T("Scribble Window");\r
  55         wc.hCursor = ::LoadCursor(GetApp()->GetInstanceHandle(), MAKEINTRESOURCE(IDC_CURSOR1));\r
  56 }\r
  57 \r
  58 void CView::SetPen(COLORREF color)\r
  59 {\r
  60         m_PenColor = color;\r
  61 }\r
  62 \r
  63 void CView::StorePoint(int x, int y, bool PenDown)\r
  64 {\r
  65         PlotPoint P1;\r
  66         P1.x = x;\r
  67         P1.y = y;\r
  68         P1.PenDown = PenDown;\r
  69         P1.color = m_PenColor;\r
  70 \r
  71         m_points.push_back(P1); //Add the point to the vector\r
  72 }\r
  73 \r
  74 void CView::OnLButtonDown(LPARAM lParam)\r
  75 {\r
  76         // Capture mouse input.\r
  77         SetCapture();\r
  78 \r
  79         StorePoint(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), true);\r
  80 }\r
  81 \r
  82 void CView::OnLButtonUp(LPARAM lParam)\r
  83 {\r
  84         {\r
  85                 //Release the capture on the mouse\r
  86                 ReleaseCapture();\r
  87 \r
  88                 StorePoint(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), false);\r
  89         }\r
  90 }\r
  91 \r
  92 void CView::OnMouseMove(WPARAM wParam, LPARAM lParam)\r
  93 {\r
  94         // hold down the left mouse button and move mouse to draw lines.\r
  95         if ( (wParam & MK_LBUTTON) && (GetCapture() == this) )\r
  96         {\r
  97                 DrawLine(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));\r
  98                 StorePoint(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), true);\r
  99         }\r
 100 }\r
 101 \r
 102 LRESULT CView::WndProc(UINT uMsg, WPARAM wParam, LPARAM lParam)\r
 103 {\r
 104         switch (uMsg)\r
 105         {\r
 106         case WM_LBUTTONDOWN:\r
 107                 OnLButtonDown(lParam);\r
 108                 break;\r
 109 \r
 110         case WM_MOUSEMOVE:\r
 111                 OnMouseMove(wParam, lParam);\r
 112         break;\r
 113 \r
 114     case WM_LBUTTONUP:\r
 115                 OnLButtonUp(lParam);\r
 116                 break;\r
 117         }\r
 118 \r
 119         //Use the default message handling for remaining messages\r
 120         return WndProcDefault(uMsg, wParam, lParam);\r
 121 }\r
 122 \r
 123 \r
 124 \r
 125 \r