Qt实现Code39条形码

/***************************** 生成Code39条码 By Jeff.Ma 2018-08-28 ******************************/ #include "code39.h" Code39::Code39(QString BarCode, QString SavePath, int fontSize) { barcode = BarCode; path = SavePath; m_barHigh = 40; m_barWidth = 2; m_fontSize = fontSize; m_includeSN = false; InitMap(); //start(); } void Code39::start(int barWidth, int high, bool sn) { m_includeSN = sn; m_barHigh = high; m_barWidth = barWidth; //校验字符是否合法 QString com="0123456789ABCDEFGHIJKLMNOPQISTUVWXWZ+-*/%$. ";//合法字符模版 for(int i=0;i<barcode.size();i++) { if(!com.contains(barcode.at(i))) { QMessageBox msg; msg.setText(QStringLiteral("条形码字符不合法！\n合法字符:A~Z 0~9 +-/%$[空格]")); msg.exec(); return; } } draw(CodeBinary(barcode),barcode); } void Code39::draw(QString BinaryNum,QString barcode) { int maxWidth; //预留10px的左右空白； maxWidth = m_barWidth * BinaryNum.size() + 5; //计算条线宽度时，精度丢失造成条码右边空白，进行右移居中 int move=(maxWidth - m_barWidth * BinaryNum.size()) / 2; QSize size(maxWidth, m_barHigh + m_fontSize + 5); QImage image(size, QImage::Format_ARGB32); image.fill(qRgba(255, 255, 255, 0)); //QBitmap bmp(maxWidth,m_barHigh+m_fontSize); QPainter painter(&image); QPen white,black; // painter.setRenderHint(QPainter::Antialiasing,true);//弧线圆润 white.setColor(QColor(255,255,255)); black.setColor(QColor(0,0,0)); white.setWidth(m_barWidth); black.setWidth(m_barWidth); //背景充填白色 painter.setPen(white); painter.drawRect(0, 0, maxWidth, m_barHigh + m_fontSize); //画线 for(int i=0;i<BinaryNum.size();i++) { if(BinaryNum.at(i)=='1') painter.setPen(black); else painter.setPen(white); painter.drawLine(i*m_barWidth+m_barWidth/2+move,0,i*m_barWidth+m_barWidth/2+move,m_barHigh); } qDebug()<<barcode<<endl; //添加底部条形码字符 painter.setPen(black); painter.setRenderHint(QPainter::Antialiasing,true); painter.setRenderHint(QPainter::TextAntialiasing,true); painter.setRenderHint(QPainter::HighQualityAntialiasing,true); QFont font; // font.setFamily("宋体"); font.setPixelSize(m_fontSize); font.setWeight(QFont::ExtraLight); painter.setFont(font); if(m_includeSN == false) { painter.drawText(5, m_barHigh + 5, maxWidth, m_fontSize, Qt::AlignCenter, barcode); } else { painter.drawText(5, m_barHigh + 5, maxWidth, m_fontSize, Qt::AlignCenter, "S/N:" + barcode); } image.save(path + barcode + ".bmp"); } QString Code39::CodeBinary(QString barcode) { barcode="*"+barcode+"*"; QString str=""; for(int i=0;i<barcode.size();i++) { str+=map[barcode.at(i)]+"0";//每个字符的二进制逻辑码之间，用“0”隔开（加一条白线） } return str; } void Code39::InitMap() { map.insert("A","110101001011"); map.insert("B","101101001011"); map.insert("C","110110100101"); map.insert("D","101011001011"); map.insert("E","110101100101"); map.insert("F","101101100101"); map.insert("G","101010011011"); map.insert("H","110101001101"); map.insert("I","101101001101"); map.insert("J","101011001101"); map.insert("K","110101010011"); map.insert("L","101101010011"); map.insert("M","110110101001"); map.insert("N","101011010011"); map.insert("O","110101101001"); map.insert("P","101101101001"); map.insert("Q","101010110011"); map.insert("R","110101011001"); map.insert("S","101101011001"); map.insert("T","101011011001"); map.insert("U","110010101011"); map.insert("V","100110101011"); map.insert("W","110011010101"); map.insert("X","100101101011"); map.insert("Y","110010110101"); map.insert("Z","100110110101"); map.insert("0","101001101101"); map.insert("1","110100101011"); map.insert("2","101100101011"); map.insert("3","110110010101"); map.insert("4","101001101011"); map.insert("5","110100110101"); map.insert("6","101100110101"); map.insert("7","101001011011"); map.insert("8","110100101101"); map.insert("9","101100101101"); map.insert("+","100101001001"); map.insert("-","100101011011"); map.insert("*","100101101101"); map.insert("/","100100101001"); map.insert("%","101001001001"); map.insert("$","100100100101"); map.insert(".","110010101101"); map.insert(" ","100110101101"); } void Code39::reset(QString BarCode, QString SavePath) { barcode=BarCode; path=SavePath; } void Code39::setFontSize(int fontSize) { m_fontSize = fontSize; }