Visual kb MFC windows program design example

//filename:VisualKB.h#define MAX_STRING 12class CMyApp:public CWinApp{public:virtual BOOL InitInstance();};class CMainWindow:public CWnd{protected:int m_cxChar;//Average character widthint m_cyChar;//Character heightint m_cyLine;//Vertical line spacing in message boxint m_nTextPos;//Index of current character for tabbed outputint m_nTabStops[7];//Tab stop locations for tabbed outputint m_nTextLimit;//Maximum width of text in text boxint m_nMsgPos;//Current position in m_strMessages arrayHCURSOR m_hCursorArrow;//Handle of arrow cursorHCURSOR m_hCursorIBeam;//Handle of I-Beam cursorCPoint m_ptTextOrigin;//Origin for drawing input textCPoint m_ptHeaderOrigin;//Origin for drawing header textCPoint m_ptUpperMsgOrigin;//Origin of first line in message boxCPoint m_ptLowerMsgOrigin;//Origin of first line in message boxCPoint m_ptCaretPos;//Current caret positionCRect m_rcTextBox;//Coordinates of text boxCRect m_rcTextBoxBorder;//Coordinates of text box borderCRect m_rcMsgBoxBorder;//Coordinates of message box borderCRect m_rcScroll;//Coordinates of scroll rectangleCString m_strInputText;//Input textCString m_stringMessages[MAX_STRING];//Array Of message stringspublic:CMainWindow();protected:int GetNearestPos(CPoint point);void PositionCaret(CDC * pDC=NULL);void DrawInputText(CDC * pDC);void ShowMessage(LPCTSTR pszMessage,UINT nChar,UINT nRepCnt,UINT nFlags);void DrawMessageHeader(CDC * pDC);void DrawMessage(CDC * pDC);void DrawMessages(CDC * pDC);protected:virtual void PostNcDestroy();afx_msg int  OnCreate(LPCREATESTRUCT lpCreateStruct);afx_msg void OnPaint ();afx_msg void OnSetFocus(CWnd* pWnd);//old wndafx_msg void OnKillFocus(CWnd* pWnd);//new wndafx_msg BOOL OnSetCursor(CWnd *pWnd,UINT nHitTest,UINT message);afx_msg void OnLButtonDown(UINT nFlags, CPoint point);afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);afx_msg void OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags);afx_msg void OnSysKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);afx_msg void OnSysKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags);afx_msg void OnChar(UINT nChar, UINT nRepCnt, UINT nFlags);afx_msg void OnSysChar(UINT nChar, UINT nRepCnt, UINT nFlags);DECLARE_MESSAGE_MAP()};

 

 

//filename:VisualKB.cpp#include <afxwin.h>#include "VisualKB.h"CMyApp myApp;//CMyApp member functionsBOOL CMyApp ::InitInstance(){m_pMainWnd = new CMainWindow;m_pMainWnd ->ShowWindow(m_nCmdShow);m_pMainWnd->UpdateWindow();return TRUE;}///////////////////////////////////////////////////////////CMainWindow message map and number functiosnBEGIN_MESSAGE_MAP(CMainWindow,CWnd)ON_WM_CREATE()ON_WM_PAINT()ON_WM_SETFOCUS()ON_WM_SETFOCUS()ON_WM_KILLFOCUS()ON_WM_SETCURSOR()ON_WM_LBUTTONDOWN()ON_WM_KEYDOWN()ON_WM_KEYUP()ON_WM_SYSKEYDOWN()ON_WM_SYSKEYUP()ON_WM_CHAR()ON_WM_SYSCHAR()END_MESSAGE_MAP()CMainWindow::CMainWindow(){m_nTextPos = 0;m_nMsgPos = 0;m_hCursorArrow = AfxGetApp()->LoadStandardCursor(IDC_ARROW);m_hCursorIBeam = AfxGetApp()->LoadStandardCursor(IDC_IBEAM);//register a WNDCLASSCString strWndClass = AfxRegisterWndClass(0,NULL,(HBRUSH)(COLOR_3DFACE + 1),AfxGetApp()->LoadStandardIcon(IDI_WINLOGO));//create a windowCreateEx(0,strWndClass,_T("Visual Keyboard"),WS_OVERLAPPED | WS_SYSMENU | WS_CAPTION | WS_MINIMIZEBOX,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL);}int CMainWindow::OnCreate(LPCREATESTRUCT lpCreateStruct){if(CWnd::OnCreate(lpCreateStruct)==-1){return -1;}CClientDC dc(this);TEXTMETRIC tm;dc.GetTextMetrics(&tm);m_cxChar = tm.tmAveCharWidth;m_cyChar = tm.tmHeight;m_cyLine = tm.tmHeight + tm.tmExternalLeading;m_rcTextBoxBorder.SetRect(16,16,(m_cxChar*64)+16,((m_cyChar*3)/2)+16);m_rcTextBox = m_rcTextBoxBorder;m_rcTextBox.InflateRect(-2,-2);m_rcMsgBoxBorder.SetRect(16, (m_cyChar*4)+16,(m_cxChar * 64)+16,(m_cyLine * MAX_STRING)+(m_cyChar * 6)+16);m_rcScroll.SetRect(m_cxChar + 16,(m_cyChar * 4)+16,(m_cxChar * 64)+16, (m_cyLine * MAX_STRING )+ (m_cyChar * 6) + 16);m_ptTextOrigin.x = m_cxChar + 16;m_ptTextOrigin.y = (m_cyChar /4 )+16;m_ptCaretPos = m_ptTextOrigin;m_nTextLimit = (m_cxChar * 63)+16;m_ptHeaderOrigin.x = m_cxChar + 16;m_ptHeaderOrigin.y = (m_cyChar * 3)+16;m_ptUpperMsgOrigin.x = m_cxChar + 16;m_ptUpperMsgOrigin.y = m_cyChar * 5 + 16;m_ptLowerMsgOrigin.x = m_cxChar + 16;m_ptLowerMsgOrigin.y = (m_cyChar * 5)+ m_cyLine * (MAX_STRING -1)+16;m_nTabStops[0] = (m_cxChar * 24) + 16;m_nTabStops[1] = (m_cxChar * 30) + 16;m_nTabStops[2] = (m_cxChar * 36) + 16;m_nTabStops[3] = (m_cxChar * 42) + 16;m_nTabStops[4] = (m_cxChar * 46) + 16;m_nTabStops[5] = (m_cxChar * 50) + 16;m_nTabStops[6] = (m_cxChar * 54) + 16;CRect rect(0,0,m_rcMsgBoxBorder.right + 16,m_rcMsgBoxBorder.bottom + 16);CalcWindowRect(&rect);SetWindowPos(NULL,0,0,rect.Width() ,rect.Height(),SWP_NOZORDER | SWP_NOMOVE | SWP_NOREDRAW);return 0;}void CMainWindow::PostNcDestroy(){delete this;}void CMainWindow::OnPaint(){CPaintDC dc(this);dc.DrawEdge(m_rcTextBoxBorder,EDGE_SUNKEN,BF_RECT);dc.DrawEdge(m_rcMsgBoxBorder,EDGE_SUNKEN,BF_RECT);DrawInputText(&dc);DrawMessageHeader(&dc);DrawMessage(&dc);}void CMainWindow::OnSetFocus(CWnd* pWnd){CreateSolidCaret(max(2,::GetSystemMetrics(SM_CXBORDER)),m_cyChar);SetCaretPos(m_ptCaretPos);ShowCaret();}void CMainWindow::OnKillFocus(CWnd* pWnd){HideCaret();m_ptCaretPos = GetCaretPos();::DestroyCaret();}BOOL CMainWindow::OnSetCursor(CWnd *pWnd,UINT nHitTest,UINT message){if(nHitTest == HTCLIENT){DWORD dwPos = ::GetMessagePos();CPoint point(LOWORD(dwPos),HIWORD(dwPos));ScreenToClient(&point);::SetCursor(m_rcTextBox.PtInRect(point)?m_hCursorIBeam:m_hCursorArrow);return TRUE;}return CWnd::OnSetCursor(pWnd,nHitTest,message);}void CMainWindow::OnLButtonDown(UINT nFlags, CPoint point){if(m_rcTextBox.PtInRect(point)){m_nTextPos = GetNearestPos(point);PositionCaret();}}void CMainWindow::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags){ShowMessage(_T("WM_KEYDOWN"),nChar,nRepCnt,nFlags);switch (nChar){case VK_LEFT:if(m_nTextPos !=0){m_nTextPos --;PositionCaret();}break;case VK_RIGHT:if(m_nTextPos != m_strInputText.GetLength()){m_nTextPos++;PositionCaret();}break;case VK_HOME:m_nTextPos = 0;PositionCaret();break;case VK_END:m_nTextPos = m_strInputText.GetLength();PositionCaret();break;}}void CMainWindow::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags){ShowMessage(_T("WM_CHAR"),nChar,nRepCnt,nFlags);CClientDC dc(this);switch (nChar){case VK_ESCAPE:case VK_RETURN:m_strInputText.Empty();m_nTextPos = 0;break;case VK_BACK:if(m_nTextPos != 0){m_strInputText = m_strInputText.Left(m_nTextPos-1)+m_strInputText.Right(m_strInputText.GetLength()- m_nTextPos);m_nTextPos--;}break;default:if((nChar>=0) && (nChar <= 31))return;if(m_nTextPos == m_strInputText.GetLength()){m_strInputText += nChar;m_nTextPos ++;}else m_strInputText.SetAt(m_nTextPos++,nChar);CSize size = dc.GetTextExtent(m_strInputText,m_strInputText.GetLength());if((m_ptTextOrigin.x + size.cx) > m_nTextLimit){m_strInputText = nChar;m_nTextPos = 1;}break;}HideCaret();DrawInputText(&dc);PositionCaret(&dc);ShowCaret();}void CMainWindow::OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags){ShowMessage(_T("WM_KEYUP"),nChar,nRepCnt,nFlags);CWnd::OnKeyUp(nChar,nRepCnt,nFlags);}void CMainWindow::OnSysKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags){ShowMessage(_T("WM_SYSKEYDOWN"),nChar,nRepCnt,nFlags);CWnd::OnSysKeyDown(nChar,nRepCnt,nFlags);}void CMainWindow::OnSysChar(UINT nChar, UINT nRepCnt, UINT nFlags){ShowMessage(_T("WM_SYSCHAR"),nChar,nRepCnt,nFlags);CWnd::OnSysChar(nChar,nRepCnt,nFlags);}void CMainWindow::OnSysKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags){ShowMessage(_T("WM_SYSKEYUP"),nChar,nRepCnt,nFlags);CWnd::OnSysKeyUp(nChar,nRepCnt,nFlags);}void CMainWindow :: PositionCaret(CDC * pDC/* =NULL */){BOOL bRelease = FALSE;if(pDC == NULL){pDC = GetDC();bRelease = true;}CPoint point = m_ptTextOrigin;CString string = m_strInputText.Left(m_nTextPos);point.x += (pDC ->GetTextExtent(string,string.GetLength())).cx;SetCaretPos(point);if(bRelease) ReleaseDC(pDC);}int CMainWindow::GetNearestPos(CPoint point){if(point.x  <= m_ptTextOrigin.x) return 0;CClientDC dc(this);int nLen = m_strInputText.GetLength();if(point.x >= (m_ptTextOrigin.x+dc.GetTextExtent(m_strInputText,nLen).cx)) return nLen;int i=0;int nPrevChar = m_ptTextOrigin.x;int nNextChar = m_ptTextOrigin.x;while(nNextChar < point.x){i++;nPrevChar = nNextChar;nNextChar = m_ptTextOrigin.x + dc.GetTextExtent(m_strInputText.Left(i),i).cx;}return point.x - nPrevChar < nNextChar - point.x ? i-1 : i ;}void CMainWindow::DrawInputText(CDC * pDC){pDC ->ExtTextOut(m_ptTextOrigin.x,m_ptTextOrigin.y,ETO_OPAQUE,m_rcTextBox,m_strInputText,NULL);}void CMainWindow::ShowMessage(LPCTSTR pszMessage,UINT nChar,UINT nRepCnt, UINT nFlags){CString string;string.Format(_T("%s\t %u\t %u\t %u\t %u\t %u\t %u\t %u"),pszMessage,nChar,nRepCnt,nFlags & 0xFF,(nFlags >> 8 ) & 0x01,(nFlags >> 13) & 0x01,(nFlags >> 14) & 0x01,(nFlags >> 15) & 0x01);ScrollWindow(0,-m_cyLine,&m_rcScroll);ValidateRect(m_rcScroll);CClientDC dc(this);dc.SetBkColor((COLORREF)::GetSysColor(COLOR_3DFACE));m_stringMessages[m_nMsgPos] = string;dc.TabbedTextOut(m_ptLowerMsgOrigin.x,m_ptLowerMsgOrigin.y,m_stringMessages[m_nMsgPos],m_stringMessages[m_nMsgPos].GetLength(),sizeof(m_nTabStops),m_nTabStops , m_ptLowerMsgOrigin.x);if(++m_nMsgPos == MAX_STRING) m_nMsgPos = 0;}void CMainWindow ::DrawMessageHeader(CDC * pDC){static CString string = _T("Message\tChar\tRep\tScan\tExt\tCan\tPrv\tTran");pDC->SetBkColor((COLORREF)::GetSysColor(COLOR_3DFACE));pDC->TabbedTextOut(m_ptHeaderOrigin.x,m_ptHeaderOrigin.y,string,string.GetLength(),sizeof(m_nTabStops),m_nTabStops,m_ptHeaderOrigin.x);}void CMainWindow::DrawMessage(CDC * pDC){int nPos = m_nMsgPos;pDC->SetBkColor((COLORREF)::GetSysColor(COLOR_3DFACE));for(int i=0;i<MAX_STRING;i++){pDC->TabbedTextOut(m_ptUpperMsgOrigin.x,m_ptUpperMsgOrigin.y + m_cyLine*i,m_stringMessages[nPos],m_stringMessages[nPos].GetLength(),sizeof(m_nTabStops),m_nTabStops,m_ptUpperMsgOrigin.x);if(++nPos == MAX_STRING) nPos = 0;}}