Parameters to filters

[Boudewijn Rempt]

On Thursday 23 August 2012 Aug, Inge Wallin wrote:

> While this is good for default values when a value *has* to be provided, it's 
> perhaps not so good for values that are optional.  Consider (syntax is not 
> finalized of course):
> 
> # calligraconverter --parameter:cover-image=./cover.svg book.odt book.epub
> 
> Now, if cover-image is not given the next time the converter is run, it means 
> "do not put a cover image in the file" rather than "use the same cover image 
> as the last time".
> 
> And even if it was a setting we still need to provide a way to set the value 
> the first time so we still need to parse command line options.

Well, you can always provide a different config file without a cover, of course. 

> Ah, so the filters open the dialog.  

Yes, but that's true for all calligra filters -- if they need settings, they show a dialog.

> How do you handle --batch?

By not showing the dialog, and for krita, restoring the values from the config file, for the rest of calligra, default values are used.

> The properties class seems useful. But I seem to remember something called 
> KoProperties... Is that more or less the same? Or what is that used for.

Sort of similar, but not compatible with the way Krita works. It offers a generic property setting gui, while Krita shows custom dialogs for everything. KoProperty is only used in Kexi and Plan.

-- 
Boudewijn Rempt
http://www.valdyas.org, http://www.krita.org, http://www.boudewijnrempt.nl