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#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()

{

//! [0]

    QTextDocument *document = editor->document();

    QPrinter printer;

    QPrintDialog *dlg = new QPrintDialog(&printer, this);

    if (dlg->exec() != QDialog::Accepted)

        return;

    document->print(&printer);

//! [0]

}

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);

}