(C++) QPrinterExample1

 

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

 

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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

 

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#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

 

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#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

 

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#include <QApplication> #include "dialog.h" int main(int argc, char *argv[]) {   QApplication a(argc, argv);   Dialog w;   w.show();      return a.exec(); }