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

[Bernd Vogelgesang]

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 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.

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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