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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++ #include "mainwindow.h"
++
++ #include <QMenu>
++ #include <QMenuBar>
++ #include <QTextEdit>
++ #include <QFileDialog>
++ #include <QPrinter>
++ #include <QPrintDialog>
++
++ MainWindow::MainWindow()
++ {
++ QMenu *fileMenu = new QMenu(tr("&File"));
++
++ fileMenu->addAction(tr("&Open..."), QKeySequence(tr("Ctrl+O", "File|Open")),
++ this, SLOT(openFile()));
++
++ 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"), QKeySequence(tr("Ctrl+Q", "File|Exit")),
++ this, SLOT(close()));
++
++ menuBar()->addMenu(fileMenu);
++
++ editor = new QTextEdit(this);
++ document = new QTextDocument(this);
++ editor->setDocument(document);
++
++ connect(editor, &QTextEdit::selectionChanged, this, &MainWindow::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);
++ }