Export as PDF UI Scene

[tacdin]

Hi,

I want the images and texts appearing in the interface to be rendered as PDF. I have a button and when the button is triggered, it saves whatever is on the screen that appears in the interface as a PDF(like export as PDF) . For this, I looked at the resources and the topics opened in the forum, but I could not reach a clear result. I would be very happy if you could help with this.

[jsulm]

@tacdin See https://forum.qt.io/topic/111913/print-widget-to-pdf-with-the-minimal-content
So, create a printer, create a painter with printer as parameter and call widget->render(&painter) on the widget you want to print.

[tacdin]

@jsulm Thank you so how can I bind this to QML.

[jsulm]

@tacdin That I don't know (I'm not a QML expert, didn't notice you posted in QML forum).

[tacdin]

@jsulm oh, that's okay ,maybe you know a LifeTime QT Champion for QML and this topic, you can tag it here. :p

[SGaist]

Hi,

KDAB has a very interesting article on the matter.

[tacdin]

@SGaist I'm sorry for the late reply. I just saw what you wrote. I tried something like this.

hedader file

#pragma once
#include <QQmlApplicationEngine>

class PdfExporter : public QQmlApplicationEngine
{
    Q_OBJECT

public:
    PdfExporter(QQmlApplicationEngine * engine);
    Q_INVOKABLE void screenShot();
  //  Q_INVOKABLE void writePdf();
private:
    QQmlApplicationEngine * mEngine;
};

.cpp file

#include <Drawer.h>
#include <QQuickWindow>
#include <QPrinter>
#include <QPainter>
#include <QPdfWriter>
PdfExporter::PdfExporter(QQmlApplicationEngine *engine) : QQmlApplicationEngine(engine), mEngine(engine)
{

}

void PdfExporter::screenShot()
{
    foreach(QObject* obj, mEngine->rootObjects()) {
      QQuickWindow* window = qobject_cast<QQuickWindow*>(obj);
      if (window)
      {
        QImage windowImage = window->grabWindow();
        QPrinter pdfPrinter(QPrinter::HighResolution);
        pdfPrinter.setOutputFormat(QPrinter::PdfFormat);
        pdfPrinter.setPaperSize(QPrinter::A4);
        pdfPrinter.setOutputFileName("test.pdf");
        pdfPrinter.setResolution(600);
        QPainter painter;
        painter.begin(&pdfPrinter);

        painter.drawImage(QRect(0,0,windowImage.width(),windowImage.height()),windowImage,{0,0,windowImage.width(),windowImage.height()});
        painter.end();
      }
    }
}

for .qml file

Button
        {
            Layout.preferredWidth:  100
            Layout.preferredHeight:  20
            Layout.alignment: Qt.AlignHCenter
            text: "test"
            onClicked: drawer.screenShot()
        }

but the resolution is too bad. Do you have a suggestion for this?

[tacdin]

@SGaist What is explained here is not clear enough. There is no information about header files, any of the structures to #include, and that's why I'm getting so many errors. I wish you could elaborate a little more on this link. I'm sure it's very easy for you. However, as a beginner, its very difficult.