2004-12-10 16:04:45 +00:00
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/***************************************************************************
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2005-11-18 20:48:01 +00:00
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* Copyright (C) 2004-5 by Enrico Ros <eros.kde@email.it> *
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2006-05-08 20:12:04 +00:00
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* Copyright (C) 2005 by Piotr Szymanski <niedakh@gmail.com> *
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2004-12-10 16:04:45 +00:00
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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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2006-09-21 08:45:36 +00:00
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#ifndef _OKULAR_GENERATOR_H_
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#define _OKULAR_GENERATOR_H_
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2007-01-03 14:30:48 +00:00
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#include <okular/core/okular_export.h>
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#include <okular/core/global.h>
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#include <core/pagesize.h>
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#include <QtCore/QList>
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#include <QtCore/QObject>
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#include <QtCore/QString>
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#include <QtCore/QVariant>
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#include <QtCore/QVector>
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2006-07-01 22:17:53 +00:00
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#include <kmimetype.h>
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#define OKULAR_EXPORT_PLUGIN( classname ) \
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extern "C" { \
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OKULAR_EXPORT Okular::Generator* create_plugin() { return new classname(); } \
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}
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class KIcon;
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class KPrinter;
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class kdbgstream;
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namespace Okular {
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class Document;
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class DocumentFonts;
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class DocumentInfo;
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class DocumentSynopsis;
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class EmbeddedFile;
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class Link;
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class Page;
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class PixmapRequest;
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class TextPage;
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2007-01-04 15:22:28 +00:00
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/* Note: on contents generation and asynchronous queries.
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* Many observers may want to request data syncronously or asynchronously.
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* - Sync requests. These should be done in-place.
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* - Async request must be done in real background. That usually means a
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* thread, such as QThread derived classes.
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* Once contents are available, they must be immediately stored in the
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* Page they refer to, and a signal is emitted as soon as storing
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* (even for sync or async queries) has been done.
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*/
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/**
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* @short Defines an entry for the export menu
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*
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* This class encapsulates information about an export format.
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* Every Generator can support 0 or more export formats which can be
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* queried with @ref Generator::exportFormats().
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*/
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class OKULAR_EXPORT ExportFormat
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{
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public:
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typedef QList<ExportFormat> List;
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/**
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* Creates an empty export format.
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*/
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ExportFormat();
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/**
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* Creates a new export format.
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*
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* @param description The i18n'ed description of the format.
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* @param mimeType The supported mime type of the format.
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*/
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ExportFormat( const QString &description, const KMimeType::Ptr &mimeType );
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/**
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* Creates a new export format.
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*
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* @param icon The icon used in the GUI for this format.
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* @param description The i18n'ed description of the format.
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* @param mimeType The supported mime type of the format.
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*/
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ExportFormat( const KIcon &icon, const QString &description, const KMimeType::Ptr &mimeType );
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/**
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* Destroys the export format.
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*/
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~ExportFormat();
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/**
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* @internal
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*/
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ExportFormat( const ExportFormat &other );
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/**
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* @internal
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*/
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ExportFormat& operator=( const ExportFormat &other );
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/**
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* Returns the description of the format.
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*/
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QString description() const;
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/**
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* Returns the mime type of the format.
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*/
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KMimeType::Ptr mimeType() const;
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/**
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* Returns the icon for GUI representations of the format.
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*/
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KIcon icon() const;
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private:
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class Private;
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Private* const d;
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};
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/**
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* @short [Abstract Class] The information generator.
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*
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* Most of class members are pure virtuals and they must be implemented to
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* provide a class that builds contents (graphics and text).
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*
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* Generation/query is requested by the 'Document' class only, and that
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* class stores the resulting data into 'Page's. The data will then be
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* displayed by the GUI components (pageView, thumbnailList, etc..).
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*/
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class OKULAR_EXPORT Generator : public QObject
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{
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Q_OBJECT
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public:
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enum GeneratorFeature
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{
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TextExtraction, ///< Whether the Generator can extract text from the document in the form of TextPage's
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ReadRawData, ///< Whether the Generator can read a document directly from its raw data.
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PageSizes, ///< Whether the Generator can change the size of the document pages.
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};
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2006-10-20 16:51:46 +00:00
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/**
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* Creates a new generator.
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*/
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Generator();
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/**
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* Destroys the generator.
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*/
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virtual ~Generator();
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/**
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* Sets the current document the generator should work on.
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*/
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void setDocument( Document * document );
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/**
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* Loads the document with the given @p fileName and fills the
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* @p pagesVector with the parsed pages.
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*
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* @returns true on success, false otherwise.
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*/
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virtual bool loadDocument( const QString & fileName, QVector< Page * > & pagesVector ) = 0;
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/**
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* Loads the document from the raw data @p fileData and fills the
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* @p pagesVector with the parsed pages.
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*
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* @note the Generator has to have the feature @ref ReadRawData enabled
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*
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* @returns true on success, false otherwise.
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*/
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virtual bool loadDocumentFromData( const QByteArray & fileData, QVector< Page * > & pagesVector );
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/**
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* This method is called when the document is closed and not used
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* any longer.
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*
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* @returns true on success, false otherwise.
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*/
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virtual bool closeDocument() = 0;
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/**
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* This method returns whether the generator can create pixmaps for
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* each page in a synchronous or asynchronous way, depending on @p async.
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*/
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virtual bool canGeneratePixmap( bool async ) const = 0;
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/**
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* This method is called to create a pixmap for a page. The page number,
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* width and height is encapsulated in the page @p request.
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*/
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virtual void generatePixmap( PixmapRequest * request ) = 0;
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/**
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* This method is called to create a so called 'text page' for the given @p page.
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*
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* A text page is an abstract description of the readable text of the page.
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* It's used for search and text extraction.
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*/
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virtual void generateSyncTextPage( Page *page );
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/**
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* Returns the general information object of the document or 0 if
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* no information are available.
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*/
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virtual const DocumentInfo * generateDocumentInfo();
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/**
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* Returns the 'table of content' object of the document or 0 if
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* no table of content is available.
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*/
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virtual const DocumentSynopsis * generateDocumentSynopsis();
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/**
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* Returns the 'list of embedded fonts' object of the document or 0 if
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* no list of embedded fonts is available.
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*/
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virtual const DocumentFonts * generateDocumentFonts();
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/**
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* Returns the 'list of embedded files' object of the document or 0 if
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* no list of embedded files is available.
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*/
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virtual const QList<EmbeddedFile*> * embeddedFiles() const;
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/**
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* This enum identifies the metric of the page size.
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*/
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enum PageSizeMetric
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{
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None, ///< The page size is not defined in a physical metric.
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Points ///< The page size is given in 1/72 inches.
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};
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/**
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* This method returns the metric of the page size. Default is @ref None.
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*/
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virtual PageSizeMetric pagesSizeMetric() const;
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/**
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* This method returns whether given action (@ref Permission) is
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* allowed in this document.
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*/
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virtual bool isAllowed( Permissions action ) const;
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/**
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* This method is called when the orientation has been changed by the user.
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*/
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virtual void rotationChanged( Rotation orientation, Rotation oldOrientation );
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/**
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* Returns the list of supported page sizes.
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*/
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virtual PageSize::List pageSizes() const;
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/**
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* This method is called when the page size has been changed by the user.
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*/
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virtual void pageSizeChanged( const PageSize &pageSize, const PageSize &oldPageSize );
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/**
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* This method is called to print the document to the given @p printer.
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*/
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virtual bool print( KPrinter &printer );
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/**
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* This method returns the meta data of the given @p key with the given @p option
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* of the document.
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*/
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virtual QVariant metaData( const QString &key, const QVariant &option ) const;
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/**
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* Returns the list of additional supported export formats.
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*/
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virtual ExportFormat::List exportFormats() const;
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/**
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* This method is called to export the document in the given @p format and save it
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* under the given @p fileName. The format must be one of the supported export formats.
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*/
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virtual bool exportTo( const QString &fileName, const ExportFormat &format );
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/**
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* Query for the specified @p feature.
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*/
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virtual bool hasFeature( GeneratorFeature feature ) const;
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Q_SIGNALS:
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/**
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* This signal should be emitted whenever an error occurred in the generator.
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*
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* @param message The message which should be shown to the user.
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* @param duration The time that the message should be shown to the user.
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*/
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void error( const QString &message, int duration );
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/**
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* This signal should be emitted whenever the user should be warned.
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*
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* @param message The message which should be shown to the user.
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* @param duration The time that the message should be shown to the user.
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*/
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void warning( const QString &message, int duration );
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/**
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* This signal should be emitted whenever the user should be noticed.
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*
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* @param message The message which should be shown to the user.
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* @param duration The time that the message should be shown to the user.
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*/
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void notice( const QString &message, int duration );
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- Page/Link: tooltips for links backported
- Page: rotation does not switch height and width
- Document/Part/Generator:
1. Add API for attaching stuff to the interface: ActionCollection and the Navigation Panel
also add possibility to merge an XML .rc file with menu layout. Relevant functions are:
QString Generator::getXMLFile(), returns a QString with your .rc file name.
void Generator::setupGUI (KActionCollection* , QToolbox* ), add your components to the user interface
2. Supporting backend settings:
If during startup, backends which provide a configuration ([X-KDE-oKularHasInternalSettings]
set to true) are found, a menu item: configure backends is created, clicking on it results in
loading all the generators that have settings, but not those that dont. the Generator::addPages(KConfigDialog *dlg)
function should be overloaded by a generator and dlg->addPage should be used to add pages.
If a user opens a file that needs an already loaded generator, the already loaded one is used instead of loading another.
3. Error/Warning/Notice sending support, to send a notice/error/warning, add a relevant notice/error/warning(QString& txt ,int duration)
to the generator class, and sending a message to the user is as simple as emitting a signal!
4. Intercepting of events generated by the PageView is done by Generator::handleEvent(QEvent*), subclass it, do a switch on QEvent::type(), handle your
event and return true if pageview is to proceed with its handling or false if not.
5. Support configuring the KPrinter on the generator side, use Generator::canConfigurePrinter(), return true there, and you get a nonconfigured KPrinter in your
Generator::print()
6. PixmapRequest handling update:
a.) Generator::canGeneratePixmap is now Generator::canGeneratePixmap(bool async)
b.) Document::sendGeneratorRequests is a slot now
c.) Old way of sending pixmaps (Document::requestPixmaps(QValueList<PixmapRequest*> checking if we can generate pixmap if not, waiting for receiving)
is replaced with: requestPixmaps only queues the pixmap all checking if w can generate is done in sendGeneratorReqest, the sendGeneratorRequest is
run in three places:
1. in requestPixmaps when we receive a request
2. in requestDone if pixmapStack is not empty
3. sendGeneratorRequest, apart from removing invalid requests, takes the current request and if generator canGeratePixmap(request->async)
it removes the pixmap from stack and sends to generator if not, QTimer::singleshots to itself after 20ms, it ends when stack has no valid pixmap request
7. Added a commented out zoom field to PixmapGenerator, mightcome in handy sometime
- TextPage: add instructions that handle simplyfing the RegularAreaRect, no more double painted borders in selection rectangles, this rocks.
svn path=/trunk/playground/graphics/oKular/kpdf/; revision=445196
2005-08-10 16:14:39 +00:00
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2005-11-04 11:59:51 +00:00
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protected:
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2006-10-20 16:51:46 +00:00
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/**
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2007-01-13 22:55:00 +00:00
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* This method must be called when the pixmap request triggered by generatePixmap()
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2006-10-20 16:51:46 +00:00
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* has been finished.
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*/
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void signalRequestDone( PixmapRequest * request );
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2006-10-22 11:25:08 +00:00
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/**
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* Returns a pointer to the document.
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*/
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Document * document() const;
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private:
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2006-10-25 15:35:53 +00:00
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class Private;
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Private* const d;
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2004-12-22 18:21:36 +00:00
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};
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/**
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* @short Describes a pixmap type request.
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*/
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2006-10-25 15:35:53 +00:00
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class OKULAR_EXPORT PixmapRequest
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2006-07-01 22:17:53 +00:00
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{
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2006-10-25 17:43:15 +00:00
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friend class Document;
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public:
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/**
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* Creates a new pixmap request.
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*
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* @param id The observer id.
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* @param pageNumber The page number.
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* @param width The width of the page.
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* @param height The height of the page.
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* @param priority The priority of the request.
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* @param asynchronous The mode of generation.
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*/
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PixmapRequest( int id, int pageNumber, int width, int height, int priority, bool asynchronous );
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/**
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* Destroys the pixmap request.
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*/
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~PixmapRequest();
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/**
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* Returns the observer id of the request.
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*/
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int id() const;
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/**
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* Returns the page number of the request.
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*/
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int pageNumber() const;
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/**
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* Returns the page width of the requested pixmap.
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*/
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int width() const;
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/**
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* Returns the page height of the requested pixmap.
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*/
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int height() const;
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/**
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* Returns the priority (less it better, 0 is maximum) of the
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* request.
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*/
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int priority() const;
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/**
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* Returns whether the generation should be done synchronous or
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* asynchronous.
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*
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* If asynchronous, the pixmap is created in a thread and the observer
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* is notified when the job is done.
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*/
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bool asynchronous() const;
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/**
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* Returns a pointer to the page where the pixmap shall be generated for.
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*/
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Page *page() const;
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/**
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* Internal usage.
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*/
|
2007-01-17 16:50:54 +00:00
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void swap();
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2006-10-25 17:43:15 +00:00
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2007-01-17 16:50:54 +00:00
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protected:
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2006-10-25 17:43:15 +00:00
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/**
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* Internal usage.
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*/
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2007-01-17 16:50:54 +00:00
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void setPriority( int priority );
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2006-10-25 17:43:15 +00:00
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/**
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* Internal usage.
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*/
|
2007-01-17 16:50:54 +00:00
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void setAsynchronous( bool asynchronous );
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2006-10-25 17:43:15 +00:00
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2006-11-20 07:53:32 +00:00
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/**
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* Internal usage.
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*/
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2007-01-17 16:50:54 +00:00
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void setPage( Page *page );
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2006-11-20 07:53:32 +00:00
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2006-10-25 17:43:15 +00:00
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private:
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Q_DISABLE_COPY( PixmapRequest )
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class Private;
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Private* const d;
|
2006-07-01 22:17:53 +00:00
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};
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2006-09-21 08:45:36 +00:00
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}
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2006-10-22 13:34:47 +00:00
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kdbgstream& operator<<( kdbgstream &str, const Okular::PixmapRequest &req );
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2004-12-10 16:04:45 +00:00
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#endif
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