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48 lines
1.9 KiB
48 lines
1.9 KiB
/*************************************************************************** |
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* Copyright (C) 2005 by Enrico Ros <eros.kde@email.it> * |
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* Copyright (C) 2005 by Albert Astals Cid <tsdgeos@terra.es> * |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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***************************************************************************/ |
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#ifndef _KPDF_DOCUMENTOBSERVER_H_ |
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#define _KPDF_DOCUMENTOBSERVER_H_ |
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#include <qvaluevector.h> |
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#include <qrect.h> |
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/** IDs for observers. Globally defined here. **/ |
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#define PRESENTATION_ID 1 |
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#define PART_ID 2 |
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#define PAGEVIEW_ID 3 |
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#define THUMBNAILS_ID 4 |
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#define TOC_ID 5 |
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/** |
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* @short Base class for objects being notified when something changes. |
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* |
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* Inherit this class and call KPDFDocument->addObserver( yourClass ) to get |
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* notified of asyncronous events (new pixmap generated, or changed, etc..). |
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*/ |
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class KPDFDocumentObserver |
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{ |
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public: |
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// you must give each observer a unique ID (used for notifications) |
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virtual uint observerId() const = 0; |
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// commands from the Document to all observers |
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virtual void pageSetup( const QValueVector< class KPDFPage * > & /*pages*/, bool /*documentChanged*/ ) {}; |
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virtual void pageSetCurrent( int /*pageNumber*/, const QRect & /*viewport*/ = QRect() ) {}; |
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// queries to observers |
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virtual bool canUnloadPixmap( int /*pageNum*/ ) { return true; } |
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// monitor changes in pixmaps (generation thread complete) |
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virtual void notifyPixmapChanged( int /*pageNumber*/ ) {}; |
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virtual void notifyPixmapsCleared() {}; |
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}; |
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#endif
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