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