--- /dev/null
+//////////////////////////////////////////////\r
+// View.cpp\r
+// Definitions for the CView class\r
+\r
+#include "stdafx.h"\r
+#include "view.h"\r
+#include "resource.h"\r
+\r
+\r
+using namespace std;\r
+\r
+CView::CView() : m_PenColor(RGB(0,0,0))\r
+{\r
+ m_Brush.CreateSolidBrush(RGB(255,255,230));\r
+}\r
+\r
+CView::~CView()\r
+{\r
+}\r
+\r
+void CView::ClearPoints()\r
+{\r
+ m_points.clear();\r
+ Invalidate();\r
+}\r
+\r
+void CView::DrawLine(int x, int y)\r
+{\r
+ CClientDC dcClient(this);\r
+ dcClient.CreatePen(PS_SOLID, 1, m_points.back().color);\r
+ dcClient.MoveTo(m_points.back().x, m_points.back().y);\r
+ dcClient.LineTo(x, y);\r
+}\r
+\r
+void CView::OnDraw(CDC* pDC)\r
+{\r
+\r
+ // Here we use double buffering (drawing to a memory DC) for smoother rendering\r
+ // Set up our Memory DC and bitmap\r
+ CMemDC MemDC(pDC);\r
+ int Width = GetClientRect().Width();\r
+ int Height = GetClientRect().Height();\r
+ MemDC.CreateCompatibleBitmap(pDC, Width, Height);\r
+ MemDC.FillRect(GetClientRect(), &m_Brush);\r
+\r
+ if (m_points.size() > 0)\r
+ {\r
+ bool bDraw = false; //Start with the pen up\r
+ for (unsigned int i = 0 ; i < m_points.size(); i++)\r
+ {\r
+\r
+ MemDC.CreatePen(PS_SOLID, 1, m_points[i].color);\r
+ if (bDraw)\r
+ MemDC.LineTo(m_points[i].x, m_points[i].y);\r
+ else\r
+ MemDC.MoveTo(m_points[i].x, m_points[i].y);\r
+\r
+ bDraw = m_points[i].PenDown;\r
+ }\r
+ }\r
+\r
+ // Copy from the memory DC to our painting dc\r
+ pDC->BitBlt(0, 0, Width, Height, &MemDC, 0, 0, SRCCOPY);\r
+}\r
+\r
+void CView::PreCreate(CREATESTRUCT &cs)\r
+{\r
+ // Set the extra style to provide a sunken effect\r
+ cs.dwExStyle = WS_EX_CLIENTEDGE;\r
+}\r
+\r
+void CView::PreRegisterClass(WNDCLASS &wc)\r
+{\r
+ // Set the background brush, class name and cursor\r
+ wc.hbrBackground = m_Brush;\r
+ wc.lpszClassName = _T("Scribble Window");\r
+ wc.hCursor = ::LoadCursor(GetApp()->GetInstanceHandle(), MAKEINTRESOURCE(IDC_CURSOR1));\r
+}\r
+\r
+BOOL CView::FileOpen(LPCTSTR szFilename)\r
+{\r
+ // empty the PlotPoint vector\r
+ m_points.clear();\r
+ DWORD nBytesRead;\r
+ BOOL bResult = FALSE;\r
+\r
+ // Create a handle to the file\r
+ CFile File;\r
+ if (File.Open(szFilename, OPEN_EXISTING))\r
+ {\r
+ do\r
+ {\r
+ PlotPoint pp;\r
+ nBytesRead = File.Read(&pp, sizeof(PlotPoint));\r
+ if (nBytesRead == sizeof(PlotPoint))\r
+ m_points.push_back(pp);\r
+\r
+ } while (nBytesRead == sizeof(PlotPoint));\r
+\r
+ if ((0 != nBytesRead) || (m_points.empty()))\r
+ {\r
+ // Failed to read all of the file\r
+ m_points.clear();\r
+ ::MessageBox (0, _T("Invalid data in file"), _T("Error"), MB_ICONEXCLAMATION | MB_OK);\r
+ }\r
+ else\r
+ bResult = TRUE;\r
+\r
+ }\r
+ else\r
+ {\r
+ CString strErrMsg = _T("Failed to open file ");\r
+ strErrMsg += szFilename;\r
+ ::MessageBox (0, strErrMsg, _T("Error"), MB_ICONEXCLAMATION | MB_OK);\r
+ }\r
+\r
+ Invalidate();\r
+ return bResult;\r
+}\r
+\r
+BOOL CView::FileSave(LPCTSTR szFilename)\r
+{\r
+ BOOL bResult = TRUE;\r
+ CFile hFile;\r
+ if (!hFile.Open(szFilename, CREATE_ALWAYS))\r
+ {\r
+ ::MessageBox (0, _T("Failed to open file for writing"), _T("Error"), MB_ICONEXCLAMATION | MB_OK);\r
+ bResult = FALSE;\r
+ }\r
+\r
+ if (bResult)\r
+ {\r
+ // Write the file\r
+ for (size_t i = 0; i < m_points.size(); ++i)\r
+ {\r
+ if (!hFile.Write(&m_points[i], sizeof(PlotPoint)))\r
+ {\r
+ ::MessageBox (0, _T("Error while writing to file"), _T("Error"), MB_ICONEXCLAMATION | MB_OK);\r
+ bResult = FALSE;\r
+ break;\r
+ }\r
+ }\r
+\r
+ // Verify file length\r
+ if (hFile.GetLength() != m_points.size() * sizeof(PlotPoint))\r
+ {\r
+ ::MessageBox (0, _T("Error while writing to file"), _T("Error"), MB_ICONEXCLAMATION | MB_OK);\r
+ bResult = FALSE;\r
+ }\r
+ }\r
+\r
+ return bResult;\r
+}\r
+\r
+void CView::SetPen(COLORREF color)\r
+{\r
+ m_PenColor = color;\r
+}\r
+\r
+void CView::StorePoint(int x, int y, bool PenDown)\r
+{\r
+ PlotPoint P1;\r
+ P1.x = x;\r
+ P1.y = y;\r
+ P1.PenDown = PenDown;\r
+ P1.color = m_PenColor;\r
+\r
+ m_points.push_back(P1); //Add the point to the vector\r
+}\r
+\r
+void CView::OnLButtonDown(LPARAM lParam)\r
+{\r
+ // Capture mouse input.\r
+ SetCapture();\r
+\r
+ StorePoint(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), true);\r
+}\r
+\r
+void CView::OnLButtonUp(LPARAM lParam)\r
+{\r
+ {\r
+ //Release the capture on the mouse\r
+ ReleaseCapture();\r
+\r
+ StorePoint(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), false);\r
+ }\r
+}\r
+\r
+void CView::OnMouseMove(WPARAM wParam, LPARAM lParam)\r
+{\r
+ // hold down the left mouse button and move mouse to draw lines.\r
+ if ( (wParam & MK_LBUTTON) && (GetCapture() == this) )\r
+ {\r
+ CString str;\r
+ str.Format( _T("Draw Point: %hd, %hd\n"), GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam) );\r
+ TRACE(str);\r
+\r
+ DrawLine(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));\r
+ StorePoint(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), true);\r
+ }\r
+}\r
+\r
+LRESULT CView::WndProc(UINT uMsg, WPARAM wParam, LPARAM lParam)\r
+{\r
+ switch (uMsg)\r
+ {\r
+ case WM_LBUTTONDOWN:\r
+ OnLButtonDown(lParam);\r
+ break;\r
+\r
+ case WM_MOUSEMOVE:\r
+ OnMouseMove(wParam, lParam);\r
+ break;\r
+\r
+ case WM_LBUTTONUP:\r
+ OnLButtonUp(lParam);\r
+ break;\r
+ }\r
+\r
+ //Use the default message handling for remaining messages\r
+ return WndProcDefault(uMsg, wParam, lParam);\r
+}\r
+\r
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