53.Qt-QPdfWriter绘制PDF,支持表单输出

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之前打印PDF都是通过html形式来实现的,但是这次要做的东西,需要打印界面控件,所以需要使用QPdfWriter.

通过QPdfWriter来获取QPainter对象,就能实现在PDF上来画画啦.

代码生成的PDF如下所示:

代码效果如下所示:

代码如下所示:

//通过dialog来保存PDF路径
QString mainWindow::pdfSaveAs(QString fileName) { QString file=""; file = QFileDialog::getSaveFileName ( this, //父组件 "另存为", //标题 QString("%1/%2").arg(QStandardPaths::writableLocation(QStandardPaths::DesktopLocation)).arg(""+fileName+".pdf"), //设置路径, .表示当前路径,./表示更目录 "PDF文件", //过滤器,保存的类型 Q_NULLPTR, QFileDialog::ShowDirsOnly); return file; } //y:表单的Y坐标 //horzBorder:水平外边距,写0表示没有边距 //row,column:行数和列数 //unitHeight:单元高度 //font:字体大小 //list:要写入的单元数据 void mainWindow::pdfDrawForm(QPainter* paint,int y,int horzBorder,int row,int column,int unitHeight,QFont &font,QStringList& list) { paint->setFont(font); paint->setPen(QPen(QBrush(QColor(0,0,0)),2)); int Width = paint->viewport().width()-horzBorder*2; int unitWidth = Width/column; for(int i=0;i<row;i++) { int x= horzBorder; for(int j=0;j<column;j++) { paint->drawText(QRect(x,y, unitWidth, unitHeight), Qt::AlignCenter,list[i*column+j]); paint->drawRect(QRect(x,y, unitWidth, unitHeight)); x+=unitWidth; } y += unitHeight; } } void mainWindow::pdfCreate(checkInfo &info) { // //设置pdf保存的路径 // QString file_path = pdfSaveAs(QString("表单%1").arg(QDateTime::currentDateTime().toString("MMdd-hh-mm"))); // if(file_path.isEmpty()) // return; QString file_path =QApplication::applicationDirPath()+"/test.pdf"; QFile pdfFile(file_path); pdfFile.open(QIODevice::WriteOnly); QPdfWriter* pWriter = new QPdfWriter(&pdfFile); //Init Page pWriter->setPageSize(QPagedPaintDevice::A4); pWriter->setResolution(300); //设置dpi 每个平方英寸像素为300 pWriter->setPageMargins(QMarginsF(30, 30, 30, 30)); QPainter* pPainter = new QPainter(pWriter); //Init Font QFont font[5]={QFont("宋体",26,60),QFont("宋体",26,61),QFont("宋体",26,QFont::Normal),QFont("宋体",26,QFont::Normal),QFont("宋体",26,QFont::Normal)}; font[0].setPixelSize(86); font[1].setPixelSize(61); font[2].setPixelSize(61); font[3].setPixelSize(42); font[4].setPixelSize(54); //Painter PDF qDebug()<<pPainter->viewport(); int nPDFWidth = pPainter->viewport().width(); int nPDFHeight = pPainter->viewport().height(); //在10%的头部居中显示 int y=10; pPainter->setFont(font[0]); pPainter->drawText(QRect(0,y, nPDFWidth, 100), Qt::AlignCenter, m_arg.printTitle); y+=140; pPainter->setPen(QPen(QBrush(QColor(0,0,0)),5)); pPainter->drawLine(0,y,nPDFWidth,y); pPainter->drawLine(0,y+18,nPDFWidth,y+18); y+=60; pPainter->setFont(font[2]); pPainter->drawText(QRect(100,y, nPDFWidth/2, 70), Qt::AlignVCenter | Qt::AlignLeft, QString("器件型号: %1").arg(info.dev.name)); pPainter->setFont(font[2]); pPainter->drawText(QRect(nPDFWidth/2+100,y, nPDFWidth/2-100, 70), Qt::AlignVCenter | Qt::AlignLeft, QString("器件编号: %1").arg(info.devNum)); y+=90; pPainter->setFont(font[2]); pPainter->drawText(QRect(100,y, nPDFWidth/2, 70), Qt::AlignVCenter | Qt::AlignLeft, QString("装车车号: %1").arg(info.devCar)); pPainter->setFont(font[2]); pPainter->drawText(QRect(nPDFWidth/2+100,y, nPDFWidth/2-100, 70), Qt::AlignVCenter | Qt::AlignLeft, QString("试验日期: %1").arg(info.checkDate)); y+=110; pPainter->setFont(font[1]); pPainter->drawText(QRect(0,y, nPDFWidth, 80), Qt::AlignVCenter | Qt::AlignLeft, "减 振 器 标 准 参 数"); y+=120; QStringList list; list<<"速度"<<"压力"<<"拉力"<<"阻尼系数"<<"不对称率"<<"正允差"<<"负允差"; list<<info.dev.speed+"m/s"<<info.dev.yaLi+"kN"<<info.dev.laLi+"kN"<<\ info.dev.zhuNi+"kNs/m"<<info.dev.buDuiC+"%"<<info.dev.zYunCha+"%"<<info.dev.fYunCha+"%"; pdfDrawForm(pPainter,y,0,2,7,100,font[3],list); y+=260; pPainter->setFont(font[1]); pPainter->drawText(QRect(0,y, nPDFWidth, 80), Qt::AlignVCenter | Qt::AlignLeft, "示 功 图"); y+=100; //获取界面图片 int imageBorder=150; //设置图片水平边距为150 QPixmap pixmap = QPixmap::grabWidget(m_checkChart, m_checkChart->rect()); float x = (float)(nPDFWidth-imageBorder*2)/(float)pixmap.width(); pixmap= pixmap.scaled(nPDFWidth-imageBorder*2, x*pixmap.height(),Qt::IgnoreAspectRatio); //根据大小比例,来放大缩小图片 pPainter->drawPixmap(imageBorder, y, pixmap); y+=pixmap.height()+90; pPainter->setFont(font[1]); pPainter->drawText(QRect(0,y, nPDFWidth, 80), Qt::AlignVCenter | Qt::AlignLeft, "减 振 器 测 试 结 果"); y+=120; list.clear(); list<<"拉伸行程:"<<QString::asprintf("%.2fmm",info.laSheng)<<"压缩行程:"<<QString::asprintf("%.2fmm",info.yaSuo)<<"最大速度:"<<QString::asprintf("%.3fm/s",info.speed)<<"阻尼系数:"<<QString::asprintf("%.2fkNs/m",info.speed) <<"最大压力:"<<QString::asprintf("%.2fkN",info.max)<<"压力偏差:"<<QString::asprintf("%.2f%",info.maxBaiFengb)<<"最大拉力:"<<QString::asprintf("%.2fkN",info.min)<<"拉力偏差:"<<QString::asprintf("%.2f%",info.minBaiFengb) <<"不对称率:"<<QString::asprintf("%.2f%",info.buduic)<<"运行时间:"<<QString::asprintf("%dS",info.runDate)<<"试验结果:"<<info.result<<"曲线结论:"<<info.ChartResult; pdfDrawForm(pPainter,y,0,3,8,100,font[3],list); y+=400; pPainter->setFont(font[4]); pPainter->drawText(QRect(50,y, nPDFWidth/3, 80), Qt::AlignVCenter | Qt::AlignLeft, QString( "试验员: %1").arg(m_userLoginInfo->name)); pPainter->drawText(QRect(nPDFWidth/3+50,y, nPDFWidth/3, 80), Qt::AlignVCenter | Qt::AlignLeft, QString( "检查员签字: ")); pPainter->drawText(QRect(nPDFWidth/3*2,y, nPDFWidth/3, 80), Qt::AlignVCenter | Qt::AlignLeft, QString( "签字日期: ")); // pWriter->newPage(); //写下一页 //绘制完毕 delete pPainter; delete pWriter; pdfFile.close(); //通过其它PDF阅读器来打开PDF QDesktopServices::openUrl(QUrl::fromLocalFile(file_path)); }

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