[Therion] Okular pdf viewer

Bill Gee bgee at campercaver.net
Fri Nov 15 13:15:52 CET 2024


The locked file issue is not a problem on Linux.  I keep Okular open all 
the time with the map I am working on.  Therion compiles the map and 
about 10 seconds later Okular automatically reopens it.  Okular also 
reopens the map at the previous pan and zoom settings.

I looked through the Okular settings but found nothing that relates to 
file locking.  There might be some Linux magic going on related to dBus 
passing messages about file system changes.

===============
Bill Gee

On 11/15/24 01:50, Bruce Mutton wrote:
> Bill
> 
> Thought I’d try Okular, https://okular.kde.org/ <https://okular.kde.org/ 
>  >  since you mentioned it, and since it runs on Windows as well as 
> Linux (and I use Windows).
> 
>  From my very limited trial of one document…
> 
> It feels a bit like SumatraPDF, just with a better interface and more 
> capabilities.
> 
> The rendering times are occasionally fast, but usually about as slow as 
> SumatraPDF, with occasional very long white-out periods on zoom and 
> always poor fill rendering quality.  For use with Therion, if a viewer 
> is a bit slow or poor at rendering that does not worry me much.
> 
> My main reason for choosing a PDF viewer for use with Therion is that it 
> allows Therion to update the pdf file while the viewer has it open.
> 
> SumatraPDF achieves this on all but the largest of files I have Therion 
> create.
> 
> Okular fails in this respect with a modest file, with this error – 
> indicates an application has the output file locked.
> 
> /C:\Program Files\Therion\therion.exe: error -- filesystem error: cannot 
> remove: The process cannot access the file because it is being used by 
> another process [Output/LaghuElevEXT.pdf]/
> 
> /writing xtherion file ... done/
> 
> Okular has quite a few settings, so it is possible that changing some of 
> those will remove this limitation.
> 
> Anyone with insights on this?
> 
> Bruce
> 
> 
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