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diff --git a/sources/pyside2/doc/codesnippets/doc/src/snippets/dockwidgets/mainwindow.cpp b/sources/pyside2/doc/codesnippets/doc/src/snippets/dockwidgets/mainwindow.cpp
deleted file mode 100644
index 8bc0fae8..00000000
--- a/sources/pyside2/doc/codesnippets/doc/src/snippets/dockwidgets/mainwindow.cpp
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@@ -1,131 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the examples of Qt for Python.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-** * Redistributions of source code must retain the above copyright
-** notice, this list of conditions and the following disclaimer.
-** * Redistributions in binary form must reproduce the above copyright
-** notice, this list of conditions and the following disclaimer in
-** the documentation and/or other materials provided with the
-** distribution.
-** * Neither the name of The Qt Company Ltd nor the names of its
-** contributors may be used to endorse or promote products derived
-** from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include <QtWidgets>
-
-#include "mainwindow.h"
-
-MainWindow::MainWindow(QWidget *parent)
- : QMainWindow(parent)
-{
- setWindowTitle("Dock Widgets");
-
- setupDockWindow();
- setupContents();
- setupMenus();
-
- textBrowser = new QTextBrowser(this);
-
- connect(headingList, SIGNAL(itemClicked(QListWidgetItem *)),
- this, SLOT(updateText(QListWidgetItem *)));
-
- updateText(headingList->item(0));
- headingList->setCurrentRow(0);
- setCentralWidget(textBrowser);
-}
-
-void MainWindow::setupContents()
-{
- QFile titlesFile(":/Resources/titles.txt");
- titlesFile.open(QFile::ReadOnly);
- int chapter = 0;
-
- do {
- QString line = titlesFile.readLine().trimmed();
- QStringList parts = line.split("\t", QString::SkipEmptyParts);
- if (parts.size() != 2)
- break;
-
- QString chapterTitle = parts[0];
- QString fileName = parts[1];
-
- QFile chapterFile(fileName);
-
- chapterFile.open(QFile::ReadOnly);
- QListWidgetItem *item = new QListWidgetItem(chapterTitle, headingList);
- item->setData(Qt::DisplayRole, chapterTitle);
- item->setData(Qt::UserRole, chapterFile.readAll());
- item->setFlags(Qt::ItemIsEnabled | Qt::ItemIsSelectable);
- chapterFile.close();
-
- chapter++;
- } while (titlesFile.isOpen());
-
- titlesFile.close();
-}
-
-void MainWindow::setupDockWindow()
-{
-//! [0]
- contentsWindow = QDockWidget(tr("Table of Contents"), self)
- contentsWindow.setAllowedAreas(Qt.LeftDockWidgetArea | Qt.RightDockWidgetArea)
- addDockWidget(Qt.LeftDockWidgetArea, contentsWindow)
-
- headingList = QListWidget(contentsWindow)
- contentsWindow.setWidget(headingList)
-//! [0]
-}
-
-void MainWindow::setupMenus()
-{
- QAction *exitAct = new QAction(tr("E&xit"), this);
- exitAct->setShortcut(tr("Ctrl+Q"));
- exitAct->setStatusTip(tr("Exit the application"));
- connect(exitAct, SIGNAL(triggered()), qApp, SLOT(closeAllWindows()));
-
- QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
- fileMenu->addAction(exitAct);
-}
-
-void MainWindow::updateText(QListWidgetItem *item)
-{
- QString text = item->data(Qt::UserRole).toString();
- textBrowser->setHtml(text);
-}