1 /*
2  * Copyright (C) 2008, Pino Toscano <pino@kde.org>
3  * Copyright (C) 2018, Albert Astals Cid <aacid@kde.org>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2, or (at your option)
8  * any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
18  */
19 
20 #ifndef DOCUMENTOBSERVER_H
21 #define DOCUMENTOBSERVER_H
22 
23 class PdfViewer;
24 namespace Poppler {
25 class Document;
26 }
27 
28 class DocumentObserver
29 {
30     friend class PdfViewer;
31 
32 public:
33     virtual ~DocumentObserver();
34     DocumentObserver(const DocumentObserver &) = delete;
35     DocumentObserver &operator=(const DocumentObserver &) = delete;
36 
37     virtual void documentLoaded() = 0;
38     virtual void documentClosed() = 0;
39     virtual void pageChanged(int page) = 0;
40 
41 protected:
42     DocumentObserver();
43 
44     Poppler::Document *document() const;
45     void setPage(int page);
46     int page() const;
47     void reloadPage();
48 
49 private:
50     PdfViewer *m_viewer;
51 };
52 
53 #endif
54