Print out text document : QPrinter « Qt « C++

1. C++
2. Qt
3. QPrinter

Print out text document

  

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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
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** This file is part of the documentation of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL$
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** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
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** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
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#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QHash>
#include <QMainWindow>
#include <QTextDocumentFragment>

class QAction;
class QTextDocument;
class QTextEdit;

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow();

public slots:
    void openFile();
    void printFile();
    void printPdf();

private:
    QAction *printAction;
    QAction *pdfPrintAction;
    QString currentFile;
    QTextEdit *editor;
    QTextDocument *document;
};

#endif





#include <QtGui>

#include "mainwindow.h"

MainWindow::MainWindow()
{
    QMenu *fileMenu = new QMenu(tr("&File"));

    fileMenu->addAction(tr("&Open..."), this, SLOT(openFile()),
                        QKeySequence(tr("Ctrl+O", "File|Open")));

    printAction = fileMenu->addAction(tr("&Print..."), this, SLOT(printFile()));
    printAction->setEnabled(false);

    pdfPrintAction = fileMenu->addAction(tr("Print as P&DF..."), this, SLOT(printPdf()));
    pdfPrintAction->setEnabled(false);

    fileMenu->addAction(tr("E&xit"), this, SLOT(close()),
                        QKeySequence(tr("Ctrl+Q", "File|Exit")));

    menuBar()->addMenu(fileMenu);

    editor = new QTextEdit(this);
    document = new QTextDocument(this);
    editor->setDocument(document);

    connect(editor, SIGNAL(selectionChanged()), this, SLOT(updateMenus()));

    setCentralWidget(editor);
    setWindowTitle(tr("Text Document Writer"));
}

void MainWindow::openFile()
{
    QString fileName = QFileDialog::getOpenFileName(this,
        tr("Open file"), currentFile, "HTML files (*.html);;Text files (*.txt)");
    
    if (!fileName.isEmpty()) {
        QFileInfo info(fileName);
        if (info.completeSuffix() == "html") {
            QFile file(fileName);
            
            if (file.open(QIODevice::ReadOnly)) {
                editor->setHtml(file.readAll());
                file.close();
                currentFile = fileName;
            }
        } else if (info.completeSuffix() == "txt") {
            QFile file(fileName);
            
            if (file.open(QIODevice::ReadOnly)) {
                editor->setPlainText(file.readAll());
                file.close();
                currentFile = fileName;
            }
        }
        printAction->setEnabled(true);
        pdfPrintAction->setEnabled(true);
    }
}

void MainWindow::printFile()
{

    QTextDocument *document = editor->document();
    QPrinter printer;

    QPrintDialog *dlg = new QPrintDialog(&printer, this);
    if (dlg->exec() != QDialog::Accepted)
        return;

    document->print(&printer);

}

void MainWindow::printPdf()
{
    QPrinter printer(QPrinter::HighResolution);
    printer.setOutputFormat(QPrinter::PdfFormat);

    QPrintDialog *printDialog = new QPrintDialog(&printer, this);
    if (printDialog->exec() == QDialog::Accepted)
        editor->document()->print(&printer);
}






#include <QtGui>

#include "mainwindow.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    MainWindow *window = new MainWindow;
    window->resize(640, 480);
    window->show();
    return app.exec();
}

   
    
  

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