[Libreoffice-bugs] [Bug 108065] [FILESAVE DOCX] Gradient property of the data series not preserved when saved as DOCX

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=108065

--- Comment #8 from Gabor Kelemen <kelemeng at ubuntu.com> ---
(In reply to Regina Henschel from comment #7)
> From the proposed patch, "It is possible in ODF to set a gradient type
> transparency for several objects: paragraph background, page background,
> shape and frame background and most of the chart components. In OOXML it is
> not possible to use/save that, only a simple transparency expressed as a
> percentage value. To avoid user confusion and possible waste of work time a
> centrally manageable configuration key is introduced to disable this UI
> option in OOXML-heavy environments. Default setting is true so it means no
> change compared to current feature set."
> 
> In MSO each gradient stop has its own transparency value, whereas our color
> has no transparency. 

Hi Regina

Thanks for the review. This is not a straightforward area, so help thinking
about it is much appreciated.

My understanding so far is that in MSO the solid color fill can have a
transparency which is expressed as a percentage value. 
This is interoperable in LO when we select a color on Area -> Color and set a
percentage transparency value on the Transparency tab.

It is also possible to set a Transparency value for a Gradient type fill in
MSO, and that could be imported/exported, but the export currently does not
work.

> So you need the transparency gradient on import from
> OOXML. 

This is only about not setting something that cannot be exported anyways.
Import would be a different beast... I mean bug.

> Perhaps instead of totally disabling it, it would be better to
> restrict the kind of the transparency gradient to the kind as the color
> gradient and only allow setting the transparency value.

What I'd like disable here is, to my understanding: the gradient of the
transparency, which is nonexisting in OOXML.
Not the gradients transparency, which is similarly to the color fills
transparency a percentage value and could be transformed to the Transparency
spinbox of the Transparency tab.

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