POS機(jī)票據(jù)打印

1、票據(jù)打印工作任務(wù)：在Windows平臺(tái)，通過調(diào)用CPrintDialog，實(shí)現(xiàn)POS機(jī)上的票據(jù)打印。設(shè)備：佳博GP-5860III最后實(shí)現(xiàn)的打印效果圖，如下：代碼主要功能：1. 調(diào)用CPrintDialog，使用默認(rèn)打印機(jī)打印。2. 調(diào)用CreateFont，創(chuàng)建打印字體。3. StartPage EndPage完成一頁文檔的打印。其中關(guān)鍵的幾點(diǎn)：1. 當(dāng)一行顯示不下產(chǎn)品信息內(nèi)容時(shí)，如何自動(dòng)換行。2. 如何調(diào)整打印字體的大小。下面是實(shí)現(xiàn)打印功能時(shí)，分別封裝的幾個(gè)函數(shù)。void CPosDemoDlgMain:PrintNote() /Get the default printer CPrint

2、Dialog dlg(FALSE); dlg.GetDefaults(); /Is a default printer set up? HDC hdcPrinter = dlg.GetPrinterDC(); if (hdcPrinter = NULL) MessageBox(_T("Printer not found!"); else /Create a CDC and attach it to the default printer CDC dcPrinter; dcPrinter.Attach(hdcPrinter); /Call StartDoc() to begi

3、n printing DOCINFO docinfo; memset(&docinfo, 0, sizeof(docinfo); docinfo.cbSize = sizeof(docinfo); docinfo.lpszDocName = _T("CDC:StartDoc() Code Fragment"); /If it fails, complain and exit gracefully if (dcPrinter.StartDoc(&docinfo) < 0) MessageBox(_T("Printer not initalize

4、d."); else /Start a page if (dcPrinter.StartPage() < 0) MessageBox(_T("Could not start page"); dcPrinter.AbortDoc(); else /Actually do some printing INT y = 2, LOGO_H = 115; printLogo(&dcPrinter,y); y += LOGO_H; y += 5; /CGdiObject* pOldFont = dcPrinter.SelectStockObject(SYSTEM

5、_FONT); /CFont DataFont; /DataFont.CreatePointFont(120,_T("Arial Narrow"),&dcPrinter); CFont font; font.CreateFont( 18, / nHeight 0, / nWidth 0, / nEscapement 0, / nOrientation FW_NORMAL, / nWeight FALSE, / bItalic FALSE, / bUnderline 0, / cStrikeOut ANSI_CHARSET, / nCharSet OUT_DEFAUL

6、T_PRECIS, / nOutPrecision CLIP_DEFAULT_PRECIS, / nClipPrecision DEFAULT_QUALITY, / nQuality DEFAULT_PITCH | FF_SWISS, / nPitchAndFamily _T("Arial"); / lpszFacename CFont* def_font = dcPrinter.SelectObject(&font); printDate(&dcPrinter,y); y += 48; y = printProductList(&dcPrinter

7、,y); y += 10; printTotal(&dcPrinter, y); dcPrinter.EndPage(); dcPrinter.EndDoc(); dcPrinter.SelectObject(def_font); font.DeleteObject(); /dcPrinter.SelectObject(pOldFont); DeleteDC(hdcPrinter); void CPosDemoDlgMain:printLogo(CDC* pdc, INT sy) HDC dcMem; HBITMAP hBitmap; dcMem = CreateCompatibleD

8、C(0); hBitmap = (HBITMAP)LoadImage(AfxGetInstanceHandle(),_T("market.bmp"),IMAGE_BITMAP,0,0,LR_LOADFROMFILE|LR_CREATEDIBSECTION);/導(dǎo)入圖片 HBITMAP hOldBmp = (HBITMAP):SelectObject(dcMem, hBitmap);/把圖片選擇設(shè)備 BitBlt(pdc->m_hDC,10,sy,362,115,dcMem,0,0,SRCCOPY); /* :StretchBlt(pdc->m_hDC, 0, 0

9、, 380, 170, dcMem,0,0,575,178,SRCCOPY); */ :SelectObject(dcMem,hOldBmp); :DeleteDC(dcMem); :DeleteObject(hBitmap);void CPosDemoDlgMain:printDate(CDC* pdc,INT sy) SYSTEMTIME st; INT y = sy; WCHAR wcMonth12=_T("JAN"),_T("FEB"),_T("MAR"),_T("APR"),_T("MAY&qu

10、ot;),_T("JUN"), _T("JUL"),_T("AUG"),_T("SEP"),_T("OCT"),_T("NOV"),_T("DEC"); WCHAR am_pm =_T("am"); CString strDate; GetLocalTime(&st); if(st.wHour > 12) /Set up extension. wcscpy( am_pm, _T("pm"); if(st

11、.wHour > 12) /Convert from 24-hour st.wHour -= 12; /to 12-hour clock. if(st.wHour = 0) /Set hour to 12 if midnight. st.wHour = 12; strDate.Format(_T("%2d %s %4d %02d:%02d%s"),st.wDay, wcMonthst.wMonth-1, st.wYear, st.wHour,st.wMinute,am_pm); pdc->TextOut(5, y, strDate, strDate.GetLen

12、gth(); y += 38; pdc->MoveTo(2,y); pdc->LineTo(420,y);INT CPosDemoDlgMain:printProductList(CDC* pdc, INT sy)UINT i; INT x, y = sy; INT WIDTH = 188; INT len = 0, height, left, width; CRect rc(2,y,WIDTH,y+40); ProductList *pProduct = NULL;for (i=0; i< giProductListNum; i+) rc.left = 2; rc.top

13、= y; rc.right = rc.left + WIDTH; rc.bottom = y+40; pProduct = gProductList+i; height = pdc->DrawText(pProduct->wsName, -1, &rc, DT_CALCRECT|DT_LEFT|DT_TOP|DT_WORDBREAK); pdc->DrawText(pProduct->wsName, -1, &rc, DT_LEFT|DT_TOP|DT_WORDBREAK); /draw number width = 20; rc.right = rc.

14、left + WIDTH; rc.right += 10; rc.right += width; rc.left = rc.right - width; pdc->DrawText(pProduct->wsNum, -1, &rc, DT_RIGHT|DT_TOP); width = 6; rc.right += 2; rc.right += width; rc.left = rc.right - width; pdc->DrawText(L"x", -1, &rc, DT_CENTER|DT_TOP); /draw price width

15、 = 70; rc.right += 2; rc.right += width; rc.left = rc.right - width; pdc->DrawText(pProduct->wsPrice, -1, &rc, DT_RIGHT|DT_TOP|DT_SINGLELINE); /draw sub-total width = 80; rc.right += 2; rc.right += width; rc.left = rc.right - width; pdc->DrawText(pProduct->wsSubTotal, -1, &rc, DT

16、_RIGHT|DT_TOP|DT_SINGLELINE); y += height + 14; /10: 如果下一行也換行，會(huì)打印亂碼; 12: 不會(huì)亂碼; 但為了安全起見，上下兩行間隔14個(gè)像素。 pdc->MoveTo(2,y); pdc->LineTo(420,y); return y;void CPosDemoDlgMain:printTotal(CDC* pdc, INT sy)UINT i; INT x, y = sy; INT len = 0, line = 0; const INT LEFT = 2, RIGHT = 382, LINE_HEIGHT = 30; c

17、onst INT TITLE_WIDTH = 100, NUM_WIDTH = 100; CRect rc(2,y,220,y+LINE_HEIGHT);WCHAR wsBuffer256; rc.left = LEFT; rc.top = y; /draw Tax rc.top = y + line * LINE_HEIGHT; rc.bottom = rc.top + LINE_HEIGHT; rc.right = rc.left + TITLE_WIDTH; pdc->DrawText(L"Tax", -1, &rc, DT_LEFT|DT_TOP);

18、rc.left = RIGHT - NUM_WIDTH; rc.right = RIGHT; swprintf(wsBuffer, L"%d.%02d", 0, 0);pdc->DrawText(wsBuffer, -1, &rc, DT_RIGHT|DT_TOP); line+; /= /draw total rc.top = y + line * LINE_HEIGHT; rc.bottom = rc.top + LINE_HEIGHT; rc.left = LEFT; rc.right = rc.left + TITLE_WIDTH; pdc->D

19、rawText(L"Total", -1, &rc, DT_LEFT|DT_TOP); rc.left = RIGHT - NUM_WIDTH; rc.right = RIGHT;swprintf(wsBuffer, L"%d.%02d", gTotalPrice/100, gTotalPrice%100);pdc->DrawText(wsBuffer, -1, &rc, DT_RIGHT|DT_TOP); line+; /= /draw payment rc.top = y + line * LINE_HEIGHT; rc.bot

20、tom = rc.top + LINE_HEIGHT; rc.left = LEFT; rc.right = rc.left + TITLE_WIDTH; pdc->DrawText(L"Payment", -1, &rc, DT_LEFT|DT_TOP); rc.left = RIGHT - NUM_WIDTH; rc.right = RIGHT;swprintf(wsBuffer, L"%d.%02d", m_Payment/100, m_Payment%100);pdc->DrawText(wsBuffer, -1, &rc, DT_RIGHT|DT_TOP); line+; /= /draw cash change rc.top = y + line * LINE_HEIGHT; rc.bottom = rc.top + LINE_HEIGH