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59 lines
2.2 KiB
59 lines
2.2 KiB
15 years ago
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/***************************************************************************
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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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#define MINIBAR_ID 6
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/** PRIORITIES for requests. Globally defined here. **/
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#define PAGEVIEW_PRIO 1
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#define PAGEVIEW_PRELOAD_PRIO 4
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#define THUMBNAILS_PRIO 2
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#define THUMBNAILS_PRELOAD_PRIO 5
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#define PRESENTATION_PRIO 0
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#define PRESENTATION_PRELOAD_PRIO 3
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class KPDFPage;
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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 DocumentObserver
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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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enum ChangedFlags { Pixmap = 1, Bookmark = 2, Highlights = 4 };
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virtual void notifySetup( const QValueVector< KPDFPage * > & /*pages*/, bool /*documentChanged*/ ) {};
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virtual void notifyViewportChanged( bool /*smoothMove*/ ) {};
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virtual void notifyPageChanged( int /*pageNumber*/, int /*changedFlags*/ ) {};
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virtual void notifyContentsCleared( int /*changedFlags*/ ) {};
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// queries to observers
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virtual bool canUnloadPixmap( int /*pageNum*/ ) { return true; }
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};
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#endif
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