[Qgis-user] Linking label colour to line colour?

[Harrissou]

Le 11 juin 2019 19:42:29 GMT+02:00, Bernd Vogelgesang <bernd.vogelgesang at gmx.de> a écrit :
>I use QGIS since 2011 on a nearly daily basis, but it seems I'm not
>able
>to keep pace with all the stuff that gets introduced.
>
I'm not sure any of us can. It's evolving so quickly. And I'd say this is where contributing to docs is also helpful (at least for me) since you see most of the improvements coming in and can learn from testing them.

>I know of the docs-dilemma and I even subscribed to the community team
>list some months ago, but since even the hole system behind the docs
>seems to be so frightening complicated, I lost hope that I will be able
>to contribute anything useful.
>
This is a pity. We need you to report us what looks frightening complicated in the process otherwise it'll be hard for us to remove that barrier. And we are looking for feedback to allow newcomers. Are you aware of https://docs.qgis.org/3.4/en/docs/documentation_guidelines/first_contribution.html?

Harrissou
>And especially the functions are a egg-hen-problem: as long as I have
>no
>clue how to use all those functions and combinations of them, I can'
>contribute to their documentation :(
>
>Anyway, another function learned :)
>
>Bernd
>
>Am 11.06.19 um 19:13 schrieb Harrissou:
>> Hi,
>>
>> Le 11 juin 2019 17:45:45 GMT+02:00, Bernd Vogelgesang
><bernd.vogelgesang at gmx.de> a écrit :
>>> phaaa ... that was too easy!
>>>
>>> simply putting @symbol_color into the expression for data-driven
>font
>>> colour does the trick.
>>>
>>> I really love to see all these functions popping up in the last
>>> versions, but without enough examples in the docs, you'll never know
>if
>>> just need this single function, or if you need a full circus of
>other
>>> stuff before or around it in some way.
>>>
>> Humm.. actually this variable exists since January 2016 as of
>https://github.com/qgis/QGIS/pull/2512 (though not the implemented pull
>request) and already in 2.14 doc
>(https://docs.qgis.org/2.14/en/docs/user_manual/working_with_vector/expression.html#variables-functions)
>> About mention in docs, it's not a secret that we horribly need people
>to help to write the docs and we welcome any input in this regard. So
>now that you know how it works...
>> We also welcome ideas and suggestions of refactoring if needed.
>>
>> H.
>>> Now that I found out about the function name, I was finally able to
>>> find
>>> the answer on stackexchange as well:
>>> https://gis.stackexchange.com/q/152203/8202
>>>
>>> Thanx a lot!
>>>
>>> Bernd
>>>
>>> Am 11.06.19 um 14:26 schrieb DelazJ:
>>>> Hi Bernd
>>>> You might be looking for the @symbol_color variable
>>>>
>>>
>(https://docs.qgis.org/testing/en/docs/user_manual/working_with_vector/expression.html?highlight=symbol_color#variables-functions)
>>>> Regards,
>>>> Harrissou
>>>>
>>>> Le 10 juin 2019 21:11:18 GMT+02:00, Bernd Vogelgesang
>>>> <bernd.vogelgesang at gmx.de <mailto:bernd.vogelgesang at gmx.de>> a
>écrit
>>> :
>>>>      Hi,
>>>>
>>>>      is there an "easy" way to somehow show the label of a line in
>the
>>> same
>>>>      colour as the line itself?
>>>>
>>>>      I have a layer of 50somewhat lines which mark overlapping
>areas.
>>> To be
>>>>      able to better differenciate between those on a map, I would
>like
>>> to
>>>>      give the labels of the line feature the same colours as the
>lines
>>>>      themselves (sounds reasonabe).
>>>>
>>>>      The lines are just random coloured as categorical by their
>unique
>>> name.
>>>>      Can I somehow get the information of the line colour, so I can
>>> set the
>>>>      label colour data-driven by some expressions or so?
>>>>
>>>>      Cheers,
>>>>
>>>>      Bernd
>>>>
>>>
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