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== Was ist Okular? ==
 
== Was ist Okular? ==
  
{|class="tablecenter vertical=centered" width=85%
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Okular is a universal document viewer developed by KDE. Okular works on multiple platforms, including but not limited to Linux, Windows, Mac OS X, *BSD, etc.
|[[Image:Okular.png|left|]]|| '''Okular ist ein universeller Dokumentenbetrachter für KDE 4.x SC'''
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|}
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Sie können die Entwicklung des Projekts auf der [http://okular.kde.org/ Homepage] verfolgen.
 
Sie können die Entwicklung des Projekts auf der [http://okular.kde.org/ Homepage] verfolgen.
 
  
 
== Hintergrund ==
 
== Hintergrund ==
  
Die Entwicklung begann als Teil von Google's Summer of Code Programm. Die Beschreibung des Projekts ist auf der [http://developer.kde.org/summerofcode/okular.html KDE Developer's Corner] verfügbar.
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Its development began as part of Google's Summer of Code program. The description of the project can be found at [https://web.archive.org/web/20080921165821/https://developer.kde.org/summerofcode/okular.html KDE Developer's Corner].
  
Okular combines the excellent functionalities of [[Special:myLanguage/KPDF|KPDF]] with the versatility of supporting different kinds of documents, like PDF, Postscript, DjVu, CHM, and others.
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'''Okular''' combines the excellent functionalities of [[Special:myLanguage/KPDF|KPDF]] with the versatility of supporting different kinds of documents, like PDF, Postscript, DjVu, CHM, and others.
 
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Die [http://okular.kde.org/formats.php Übersicht der unterstützten Formate] enthält eine Tabelle die im Detail die unterstützen Formate und deren Funktionen darstellt.
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The [https://okular.kde.org/formats.php document format handlers page] has a chart describing in more detail the supported formats and the features supported in each of them.
  
 
[[Image:Okular-annotations.png|thumb|300px|center|Rezensionen in Okular; Rezensionen können innerhalb der PDF Datei mit abgespeichet werden.]]
 
[[Image:Okular-annotations.png|thumb|300px|center|Rezensionen in Okular; Rezensionen können innerhalb der PDF Datei mit abgespeichet werden.]]
  
 
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As well as supporting many formats, '''Okular''' offers such features as text selection, annotation, extraction of files embedded within a document, and many other surprises. Screenshots of '''Okular''' in action can be seen [https://okular.kde.org/screenshots.php here].
Neben der Unterstützung vieler Formate, bietet '''Okular''' Funktionen wie Text-Auswahl, Kommentierung, Extraktion von Dateien die in einem Dokument eingebettet sind und viele andere Überraschungen. Bildschirmfotos von '''Okular''' in Aktion können Sie [http://okular.kde.org/screenshots.php hier] sehen.
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Sie können zu Entwicklern und anderen Anwendern im IRC sprechen, irc.freenode.org, Kanal [irc://irc.kde.org/#okular #okular].
 
Sie können zu Entwicklern und anderen Anwendern im IRC sprechen, irc.freenode.org, Kanal [irc://irc.kde.org/#okular #okular].
  
Wenn Sie daran interessiert sind einen Beitrag zu '''Okular''' zu leisten, [http://okular.kde.org/contact.php kontaktieren Sie bitte das Team]. Programmierer, aber auch die, die nicht kodieren sind willkommen.
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If you are interested in contributing to '''Okular''', please [https://okular.kde.org/contact.php contact the team]. Programmers and non-coders are welcome all the same.
  
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== Mobile Version ==
  
== Tipps und Tricks ==
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Okular has a mobile version since version 0.16 release in February 2013 <ref>[https://okular.kde.org/news.php Release information]</ref>. The first version was based on the [https://community.kde.org/Plasma/Active active] framework. The mobile viewer was then ported to Kirigami in 2016 by Marco Martin<ref>[https://phabricator.kde.org/R223:eb1f73800e83b11e4a5ae93ac069893aa88f0eaa Commit port mobile version from plasma-framework to kirigami]</ref> and finally to Kirigami2 in 2017<ref>[https://phabricator.kde.org/R223:caf8820cf773316ce41d9a8c1f7357b3ffc3ef86 Commit port mobile version from kirigami to kirigami2]</ref>.
  
=== Drucken ===
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The mobile version doesn't support all features from the desktop version, but provide better touch support and a mobile interface.
  
In [http://forum.kde.org/viewtopic.php?f=20&t=85805&p=147758#p147758 diesem Forumsbeitrag] gibt ein Anwender an, das er in '''Okular''' keine PDF-Dateien drucken kann. Es stellte sich heraus, dass die Datei ~/.cups/lpoptions defekt war. Nachdem die Datei umbenannt wurde, wurde diese von '''Okular''' wieder erstellt. Danach gab es keine Probleme mehr mit dem Druck von PDF-Dateien.
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[[File:Okular_mobile_pdf_view.png|250px]]
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[[File:Okular_mobile_toc.png|250px]]
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[[File:Okular_mobile_thumbmails.png|250px]]
  
=== Reviewing Documents / Annotations ===
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You can test the mobile version in your PC by entering {{Input|1=okularkirigami}} in your [[Special:myLanguage/Tutorials/Open a console|terminal]]. A nightly android version is also available at the KDE [https://binary-factory.kde.org/view/Android/job/Okular_android/ binary factory].
  
Ein Doppelklick auf eines der '''Rezension'''s Werkzeuge (<keycap>F6</keycap>) erlaubt es ihnen mehrere Anmerkungen durchzuführen, ohne das Sie nach der ersten Benutzung das Werkzeug wieder aktivieren müssen.
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== Tipps und Tricks ==
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=== Rezension ===
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Double-clicking on either one of the '''Review''' tools (<keycap>F6</keycap>) allows you to make multiple annotations without having to reactivate the tool after the first time.
  
 
How to keep the annotations you made to the PDF file:
 
How to keep the annotations you made to the PDF file:
  
By default, Okular saves annotations in the local data directory for each user. Since KDE 4.9, it's optionally possible to store them directly in a PDF file by choosing "File -> Save As...", so they can be seen in other PDF viewers.
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By default, '''Okular''' saves annotations in the local data directory for each user. Since KDE 4.9, it's optionally possible to store them directly in a PDF file by choosing <menuchoice>File -> Save As...</menuchoice>, so they can be seen in other PDF viewers.
 
Note that this feature requires Poppler 0.20 or newer for regular PDF documents. If the PDF document you are annotating is encrypted, this feature requires Poppler 0.22 or newer.
 
Note that this feature requires Poppler 0.20 or newer for regular PDF documents. If the PDF document you are annotating is encrypted, this feature requires Poppler 0.22 or newer.
  
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=== DRM ===
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By default, Okular follows the PDF specification and don't allow copying text from DRM protected files. However, there is an option in the settings to disable DRM limitations in <menuchoice>Settings -> General -> Program Features  -> Obey DRM limitations</menuchoice>
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There was a small controversy in the Debian bug tracker a long time ago, about the default choice to Obey DRM limitations<ref>[https://lists.debian.org/debian-devel/2009/05/msg00879.html DRM and Okular in Debian bug tracker]</ref><ref>[https://lwn.net/Articles/335415/ DRM and Okular in LWM]</ref>. The choice was then [https://tsdgeos.blogspot.com/2009/06/okular-pdf-and-drm.html explained] by an Okular/KPdf developer<ref>[https://tsdgeos.blogspot.com/2009/06/okular-pdf-and-drm.html Okular, PDF and file permissions]</ref>.
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=== PDF Signature and certificate ===
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Okular can verify if a PDF certificate is valid. But you can not yet create a new signature. See the [https://tsdgeos.blogspot.com/2019/01/okular-pdf-signature-certificate.html release note] for more information.
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== Mehr Informationen ==
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* [https://docs.kde.org/trunk5/en/kdegraphics/okular/index.html Die offiziele KDE Dokumentation]
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* [https://okular.kde.org/ Die Website von Okular]
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* [https://api.kde.org/okular/html/index.html Die API Dokumentation von Okular]
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* [https://phabricator.kde.org/project/view/158/ Das Phabricator-Projekt von Okular]
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* [https://phabricator.kde.org/source/okular/ Das git-Repository von Okular]
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== References ==
  
 
[[Category:Grafik/de]]
 
[[Category:Grafik/de]]

Latest revision as of 10:30, 22 February 2019

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Was ist Okular?

Okular is a universal document viewer developed by KDE. Okular works on multiple platforms, including but not limited to Linux, Windows, Mac OS X, *BSD, etc.

Sie können die Entwicklung des Projekts auf der Homepage verfolgen.

Hintergrund

Its development began as part of Google's Summer of Code program. The description of the project can be found at KDE Developer's Corner.

Okular combines the excellent functionalities of KPDF with the versatility of supporting different kinds of documents, like PDF, Postscript, DjVu, CHM, and others.

The document format handlers page has a chart describing in more detail the supported formats and the features supported in each of them.

Rezensionen in Okular; Rezensionen können innerhalb der PDF Datei mit abgespeichet werden.

As well as supporting many formats, Okular offers such features as text selection, annotation, extraction of files embedded within a document, and many other surprises. Screenshots of Okular in action can be seen here.

Sie können zu Entwicklern und anderen Anwendern im IRC sprechen, irc.freenode.org, Kanal #okular.

If you are interested in contributing to Okular, please contact the team. Programmers and non-coders are welcome all the same.

Mobile Version

Okular has a mobile version since version 0.16 release in February 2013 [1]. The first version was based on the active framework. The mobile viewer was then ported to Kirigami in 2016 by Marco Martin[2] and finally to Kirigami2 in 2017[3].

The mobile version doesn't support all features from the desktop version, but provide better touch support and a mobile interface.

Okular mobile pdf view.png Okular mobile toc.png Okular mobile thumbmails.png

You can test the mobile version in your PC by entering
okularkirigami
in your terminal. A nightly android version is also available at the KDE binary factory.

Tipps und Tricks

Rezension

Double-clicking on either one of the Review tools (F6) allows you to make multiple annotations without having to reactivate the tool after the first time.

How to keep the annotations you made to the PDF file:

By default, Okular saves annotations in the local data directory for each user. Since KDE 4.9, it's optionally possible to store them directly in a PDF file by choosing File -> Save As..., so they can be seen in other PDF viewers. Note that this feature requires Poppler 0.20 or newer for regular PDF documents. If the PDF document you are annotating is encrypted, this feature requires Poppler 0.22 or newer.

DRM

By default, Okular follows the PDF specification and don't allow copying text from DRM protected files. However, there is an option in the settings to disable DRM limitations in Settings -> General -> Program Features -> Obey DRM limitations

There was a small controversy in the Debian bug tracker a long time ago, about the default choice to Obey DRM limitations[4][5]. The choice was then explained by an Okular/KPdf developer[6].

PDF Signature and certificate

Okular can verify if a PDF certificate is valid. But you can not yet create a new signature. See the release note for more information.

Mehr Informationen

References

  1. Release information
  2. Commit port mobile version from plasma-framework to kirigami
  3. Commit port mobile version from kirigami to kirigami2
  4. DRM and Okular in Debian bug tracker
  5. DRM and Okular in LWM
  6. Okular, PDF and file permissions

This page was last modified on 22 February 2019, at 10:30. Content is available under Creative Commons License SA 4.0 unless otherwise noted.