Qt 创建生成PDF报告

Qt 创建生成PDF报告

使用QPdfwriter 和QPainter创建pdf报告，关键是对页面的布局排版。本示例，进行了页眉，页脚，中间内容的排版。页眉左上角为图片logo,页眉右边为页数提示；页脚有生成报告的时间和公司logo布局。
图像的缩放不采用scale,直接采用Rect来缩放，如缩小原图的一半，只需 image.width/2。

#include "QReport.h"

#include 
#include 
#include 


#include "Debug.h"

QReport::QReport()
{

}

void QReport::MakePDFReport(std::string filePath)
{
    TRACE();
    std::string fileName = filePath + "\\Report.pdf";
    QString fileNameString = QString::fromStdString(fileName);
    QFile pdfFile(fileNameString);
    pdfFile.open(QIODevice::WriteOnly);
    QPdfWriter *pdfWriter = new QPdfWriter(&pdfFile);
    pdfWriter->setPageSize(QPagedPaintDevice::A4);
    pdfWriter->setResolution(300);//像素3508*2479
    pdfWriter->setTitle("Report");

    int pageMargin = 100;
    pdfWriter->setPageMargins(QMarginsF(pageMargin, pageMargin, pageMargin, pageMargin));

    QDateTime currentTime = QDateTime::currentDateTime();
    QString timeString = currentTime.toString("yyyy-MM-dd hh:mm:ss ddd");


    QPainter *pdfPainter = new QPainter(pdfWriter);



    QTextOption option(Qt::AlignHCenter | Qt::AlignVCenter);
    option.setWrapMode(QTextOption::WordWrap);
    int yCurrentP = 0;
    int xCurrentP = 0;
    int contentWidth = 2479 - pageMargin;

    QFont font;
    font.family();
//    font.setFamily("simsun.ttc");
    font.setFamily("Times New Roman");
    int fontSize =9;
    int textHeight = 90;
    font.setPointSize(fontSize);
    pdfPainter->setFont(font);

    std::string titleImageFileName = filePath + "\\Imager.png";
    QPixmap titleImage;
    titleImage.load(QString::fromStdString(titleImageFileName));
    //    pdfPainter->drawPixmap(xCurrentP, yCurrentP, titleImage.width(), titleImage.height(), titleImage);
    //    pdfPainter->scale(0.5, 0.5);
    pdfPainter->drawPixmap(xCurrentP, yCurrentP, titleImage.width()/2, titleImage.height()/2, titleImage);
    //    pdfPainter->scale(1.5, 1.5);

    option.setAlignment(Qt::AlignRight | Qt::AlignBottom);
    int pageIndex = 1;
    int totalPageIndex = 2;
    QString pageIndexString = QString::number(pageIndex) + "/" + QString::number(totalPageIndex);
    pdfPainter->drawText(QRect(xCurrentP, yCurrentP, contentWidth,titleImage.height()/2),
                         pageIndexString, option);


    yCurrentP += (titleImage.height()/2 + 4);
    QPen pen;
    int penHeigth = 4;
    pen.setWidth(penHeigth);
    pen.setColor(Qt::blue);
    pdfPainter->setPen(pen);
    pdfPainter->drawLine(xCurrentP, yCurrentP, contentWidth, yCurrentP);


    pen.setColor(Qt::black);
    pdfPainter->setPen(pen);
    yCurrentP += penHeigth;

    yCurrentP += 100;

    fontSize =22;
    font.setPointSize(fontSize);
    pdfPainter->setFont(font);
    option.setAlignment(Qt::AlignCenter);
    pdfPainter->drawText(QRect(0, yCurrentP, contentWidth, textHeight),
                         QString("分析报告"), option);

    yCurrentP += (textHeight + 100);
    fontSize = 16;
    font.setPointSize(fontSize);
    pdfPainter->setFont(font);
    option.setAlignment(Qt::AlignLeft | Qt::AlignVCenter);

    pdfPainter->drawText(QRect(xCurrentP, yCurrentP, contentWidth, 80),
                         QString("通道微滴分布图"));

    yCurrentP += (80 + 100);
    xCurrentP += 200;
    option.setWrapMode(QTextOption::WordWrap);
    pdfPainter->drawText(QRect(xCurrentP, yCurrentP, contentWidth - xCurrentP, 400),
                         QString("ROX通道分布图，FAM通道分布图，HEX通道分布图，CY5通道分布图。ROX通道分布图，FAM通道分布图，HEX通道分布图，CY5通道分布图。ROX通道分布图，FAM通道分布图，HEX通道分布图，CY5通道分布图。"),
                         option);

    yCurrentP +=(400 +100);
    std::string imageFileName = filePath + "\\ROX.bmp";
    QPixmap roxImage = QPixmap(QString::fromStdString(imageFileName));
    //    int multipe = rect.width() / roxImage.width();
    //    pdfPainter->scale(multipe, multipe);
    pdfPainter->drawPixmap(0, yCurrentP, roxImage.width()/2, roxImage.height()/2, roxImage);
    //    pdfPainter->scale(1, 1);

    std::string famFileName = filePath + "\\FAM.bmp";
    QPixmap famImage = QPixmap(QString::fromStdString(famFileName));
    //    multipe = rect.width()/ famImage.width();
    //    pdfPainter->scale(multipe, multipe);
    pdfPainter->drawPixmap(contentWidth/2, yCurrentP, famImage.width()/2, famImage.height()/2, famImage);
    //    pdfPainter->scale(1, 1);

    yCurrentP +=( std::max(roxImage.height(), famImage.height()) + 100);

    xCurrentP = 0;
    pdfPainter->drawText(QRect(xCurrentP, yCurrentP, contentWidth-xCurrentP, 80),
                         QString("交叉分析结果"), option);


    std::string logo = filePath + "\\Imager.png";
    QPixmap logoImage;
    logoImage.load(QString::fromStdString(logo));

    yCurrentP = 3508-pageMargin -( logoImage.height()/2) + 4;
    pen.setColor(Qt::blue);
    pdfPainter->setPen(pen);
    pdfPainter->drawLine(0, yCurrentP, contentWidth, yCurrentP);
    yCurrentP = 3508-pageMargin -( logoImage.height()/2);
    option.setAlignment(Qt::AlignLeft | Qt::AlignTop);
    fontSize = 9;
    font.setPointSize(fontSize);
    pen.setColor(Qt::black);
    pdfPainter->setPen(pen);
    pdfPainter->drawPixmap(contentWidth-xCurrentP-logoImage.width()/2, yCurrentP, logoImage.width()/2, logoImage.height()/2, logoImage);
    pdfPainter->setFont(font);
    pdfPainter->drawText(QRect(0, yCurrentP, 600, logoImage.height()), timeString, option);


    delete pdfPainter;
    delete pdfWriter;
    pdfFile.close();
    NOTE("Make done");

}