Hi all,
I am currently working on how to specify gradient stops in the ODF
standard. My first draft simply uses the "color" type included in ODF.
This is an RGB color without alpha. I could imagine to introduce
additionally a keyword for a color type. You could then group type and
color definition and offer different such groups for choice, see below.
Is something similar possible for UNO?
<rng:define name="draw-gradient-color">
<rng:element name="draw:gradient-color">
<rng:choice>
<rng:group>
<rng:attribute name="draw:color-type">
<rng:value>color</rng:value>
</rng:attribute>
<rng:attribute name="draw:stop-color">
<rng:ref name="color" />
<rng:empty/>
</rng:group>
<rng:group>
<rng:attribute name="draw:color-type">
<rng:value>theme</rng:value>
</rng:attribute>
<rng:ref name="loext-fill-color-theme-reference" />
</rng:group>
</rng:choice>
</rng:element>
</rng:define>
Kind regards,
Regina
Tomaž Vajngerl schrieb am 22.03.2023 um 09:08:
Hi Armin and Regina,
On Wed, Mar 15, 2023 at 7:08 AM Regina Henschel <rb.henschel@xxxxxxxxxxx
<mailto:rb.henschel@xxxxxxxxxxx>> wrote:
Hi Armin,
A further remark: We have in the meantime "Theme Colors". LO7.6 does
not
yet save theme colors to <draw:gradient>. But you can already have a
solid fill with a theme color combined with a transparency gradient. Do
you have already ideas about "Theme Colors" in gradients? Such is
needed
for roundtrip with OOXML.
Yes, a gradient stop would need to have a theme color associated.
Currently in UNO I am adding a new property that has a
css::util::XThemeColor for every color property that I want to be
theme-able, but the colors in OOXML are much more powerful - where a
color can be RGB, HSL, a scheme color, which each can also have a list
of color transformations (used to specify alpha transparency for a color
among other things). If we want better fidelity with OOXML, we probably
need to add a more powerful color UNO API than just a simple RGB color
definition (clearly missing at least alpha).
Looking at the com::sun::star::awt::ColorStop I would prefer it to be
more easily extendable - probably best to be an XInterface or something.
I will quite soon have to add at least a XThemeColor element to the
ColorStop, so I can add theme colors support for the gradients. Another
missing thing is alpha support, which is missing but supported in OOXML
and MSO office supports setting that on the UI.
Thoughts?
Kind regards,
Regina
Tomaž
