Technical facts

Application type(s)

Desktop application

Operating system(s) or programming environment(s)

Lubuntu 15.04 (vivid)

IDE(s):

Qt Creator 3.1.1

Project type:

GUI application

C++ standard:

C++98

Compiler(s):

G++ 4.9.2

Libraries used:

Qt: version 5.4.1 (32 bit)
STL: GNU ISO C++ Library, version 4.9.2

Qt project file: ./CppQPrinterExample1/CppQPrinterExample1.pro


QT       += core gui

QMAKE_CXXFLAGS += -Wextra -Werror

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets printsupport

TEMPLATE = app

SOURCES += main.cpp\

        dialog.cpp

HEADERS  += dialog.h

FORMS    += dialog.ui

./CppQPrinterExample1/dialog.h


#ifndef DIALOG_H

#define DIALOG_H



#include <QDialog>



namespace Ui {

class Dialog;

}



class Dialog : public QDialog

{

  Q_OBJECT

  

public:

  explicit Dialog(QWidget *parent = 0);

  ~Dialog();

  

private slots:

  void on_button_clicked();



private:

  Ui::Dialog *ui;

};



#endif // DIALOG_H

./CppQPrinterExample1/dialog.cpp


#include <cassert>

#include <QPainter>

#include <QPrinter>

#include "dialog.h"

#include "ui_dialog.h"



Dialog::Dialog(QWidget *parent) :

  QDialog(parent),

  ui(new Ui::Dialog)

{

  ui->setupUi(this);

}



Dialog::~Dialog()

{

  delete ui;

}



void Dialog::on_button_clicked()

{

  const QString filename = "CppQPrinterExample1.pdf";

  //Set up a QPrinter

  QPrinter printer;

  printer.setOutputFormat(QPrinter::PdfFormat);

  printer.setOrientation(QPrinter::Portrait);

  printer.setPaperSize(QPrinter::A4);

  printer.setFullPage(false);

  printer.setOutputFileName(filename);



  //Grab the window

  const QImage image = QPixmap::grabWindow(this->winId()).toImage();



  //Draw the image to painter to printer

  QPainter painter;

  painter.begin(&printer);

  painter.drawImage(0,0,image);

  painter.end();



  //Assume the PDF is created

  assert(QFile::exists(filename));}

./CppQPrinterExample1/main.cpp


#include <QApplication>

#include "dialog.h"



int main(int argc, char *argv[])

{

  QApplication a(argc, argv);

  Dialog w;

  w.show();

  

  return a.exec();

}

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(C++) QPrinterExample1

Technical facts

Qt project file: ./CppQPrinterExample1/CppQPrinterExample1.pro

./CppQPrinterExample1/dialog.h

./CppQPrinterExample1/dialog.cpp

./CppQPrinterExample1/main.cpp