qt实现界面和打印分离

#include "catprinter.h" #include <QtWidgets/QApplication> #include <QtPrintSupport\QPrinter> #include <QtPrintSupport\QPrintDialog> #include <QtWebKitWidgets\QWebFrame> #include <QtWebKitWidgets\QWebPage> #include <QtWebKit\QWebElement> #include <QtGui\QPageSize> #include <QtCore\QRectF> #include <QtGui\QPainter> #include <QtGui\QTextDocument> #include <QtCore\QFile> #include <QtCore\QTextCodec> #include <QPrinterInfo> #include <windows.h> #include <QStringList> #include "zint.h" #ifdef _DEBUG #pragma comment(lib, "../Win32/Debug/zintd.dll.lib") #else #pragma comment(lib, "../Win32/Release/zint.dll.lib") #endif typedef struct stHtml { bool bBarcode; int nTicketSize; int nPages; QString strPrinterName; QString strTicket; }S_HTML; void printHtml(const QString &strHtml, S_HTML &shtml); bool drawBarcode(QPainter &painter, const QString &strImagePath, const QRect &rtBarcode, int width); int main(int argc, char *argv[]) { QApplication a(argc, argv); QString strHtml(""); QStringList list = QCoreApplication::arguments(); S_HTML shtml; if (list.count() > 6) { strHtml = list[1]; shtml.nTicketSize = list[2].toInt();//stSetInfo.nTicketSize; shtml.nPages = list[3].toInt();//stSetInfo.nPages; shtml.strPrinterName = list[4];//stSetInfo.strPrinterName; shtml.bBarcode = list[5].toInt();//mapFormat[E_PRINT_BARCODE]; //modified by zrq 20150930 shtml.strTicket = list[6];//stInfo.strTicket; printHtml(strHtml, shtml); //return a.exec(); } else //return 0; //这里调用打印机进行打印 return 0; //a.exec(); } void printHtml(const QString &strHtml, S_HTML &shtml) { if (shtml.strPrinterName.isEmpty()) return; QPrinter printer; printer.setPrinterName(shtml.strPrinterName); //貌似没什么用，不过我还是设置了下 printer.setFullPage(true); //计算在打印机的DPI下，58mm对应的点数 int dpi=printer.logicalDpiX(); int width=min(shtml.nTicketSize, printer.paperRect(QPrinter::Millimeter).width())*(dpi*1.0/25.4);//58mm //使用QWebPage来解析并输出解析后的文档到打印机 QWebPage page; page.mainFrame()->setHtml(strHtml); QWebFrame *frame=page.mainFrame(); //设置网页视口大小，因为我在html文档中用相对大小布局的 page.setViewportSize(QSize(width,frame->findFirstElement("body").geometry().height())); if (!shtml.bBarcode) { for (int npage = 0; npage < shtml.nPages;) { QPainter painter(&printer); if (painter.isActive()) frame->render(&painter); ++npage; } } else { QString strTicket(shtml.strTicket); if (strTicket.length() > 3) strTicket = strTicket.mid(3); QString strImagePath(""); strImagePath = QCoreApplication::applicationDirPath() + "//test.png"; struct zint_symbol * my_symbol = ZBarcode_Create(); my_symbol->symbology = BARCODE_CODE93;//BARCODE_CODE11; strcpy(my_symbol->outfile, strImagePath.toLocal8Bit().toStdString().c_str()); ZBarcode_Encode(my_symbol, (unsigned char*)strTicket.toLocal8Bit().toStdString().c_str(), 0); ZBarcode_Print(my_symbol, 0); ZBarcode_Delete(my_symbol); QSize imgsize(width, frame->findFirstElement("table.barcode").geometry().height()); QRect rtBarcode(2, frame->findFirstElement("table.barcode").geometry().top(), imgsize.width(), imgsize.height()); for (int npage = 0; npage < shtml.nPages;) { //这里修改下直接打印到图片上看下效果 QPainter painter(&printer); if (painter.isActive()) frame->render(&painter); drawBarcode(painter, strImagePath, rtBarcode, width); ++npage; } } } bool drawBarcode(QPainter &painter, const QString &strImagePath, const QRect &rtBarcode, int width) { QImage image(strImagePath, "PNG"); QRect rt1 = image.rect(); QRect rtwindow = painter.window(); QRect rtview = painter.viewport(); int nmax = 0; if (image.width() + 20 < width) nmax = max(image.width() + 20, width); else nmax = min(image.width() + 20, width); QRect rtimage(0, 0, nmax, rtwindow.height()); QRect rtimageview(0, 0, nmax, rtview.height()); int nmin = min(image.width(), nmax - 80); QRectF rtdes(40, rtBarcode.top(), nmin, rtBarcode.height()); QRectF rtsrc(0, 0, image.width(), image.height()); painter.setWindow(rtimage); painter.setViewport(rtimageview); painter.drawImage(rtdes, image, rtsrc); painter.setWindow(rtwindow); painter.setViewport(rtview); return true; }