PDF Viewer Example

 /****************************************************************************
 **
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: http://www.qt.io/licensing/
 **
 ** This file is part of the QtPDF module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL3$
 ** 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 http://www.qt.io/terms-conditions. For further
 ** information use the contact form at http://www.qt.io/contact-us.
 **
 ** GNU Lesser General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU Lesser
 ** General Public License version 3 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.LGPLv3 included in the
 ** packaging of this file. Please review the following information to
 ** ensure the GNU Lesser General Public License version 3 requirements
 ** will be met: https://www.gnu.org/licenses/lgpl.html.
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU
 ** General Public License version 2.0 or later as published by the Free
 ** Software Foundation and appearing in the file LICENSE.GPL included in
 ** the packaging of this file. Please review the following information to
 ** ensure the GNU General Public License version 2.0 requirements will be
 ** met: http://www.gnu.org/licenses/gpl-2.0.html.
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #ifndef MAINWINDOW_H
 #define MAINWINDOW_H

 #include <QLoggingCategory>
 #include <QMainWindow>

 Q_DECLARE_LOGGING_CATEGORY(lcExample)

 namespace Ui {
 class MainWindow;
 }

 class QPdfDocument;
 class QPdfView;

 class PageSelector;
 class ZoomSelector;

 class MainWindow : public QMainWindow
 {
     Q_OBJECT

 public:
     explicit MainWindow(QWidget *parent = nullptr);
     ~MainWindow();

 public slots:
     void open(const QUrl &docLocation);

 private slots:
     void bookmarkSelected(const QModelIndex &index);

     // action handlers
     void on_actionOpen_triggered();
     void on_actionQuit_triggered();
     void on_actionAbout_triggered();
     void on_actionAbout_Qt_triggered();
     void on_actionZoom_In_triggered();
     void on_actionZoom_Out_triggered();
     void on_actionPrevious_Page_triggered();
     void on_actionNext_Page_triggered();
     void on_actionContinuous_triggered();

 private:
     Ui::MainWindow *ui;
     ZoomSelector *m_zoomSelector;
     PageSelector *m_pageSelector;

     QPdfDocument *m_document;
 };

 #endif // MAINWINDOW_H