[Libreoffice-bugs] [Bug 80303] UI: Property mapping - the legend should reflect this possibility

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=80303

--- Comment #21 from JL <al1 at ajltech.co.uk> ---
This is maddening, and I will try to add another explanation why. It seems that
what I would imagine are the more scarce use cases where pie charts are
concerned are being prioritised over the most common one.

Here is a description of a real-world example. Periodically, I provide my boss
with a breakdown of my time as a pie chart. The data are imported into LO from
my time tracking app and plotted. There are many categories, and I only plot
the top 10 for that time period. I want each category to maintain its colour
from report to report, whether or not it is actually shown, so that easy visual
comparison is possible. I do not want to have to cross-check and manually
adjust the colours each time. 

Permanently setting the colours categories for the chart itself is easy, using
the fill range - brilliant! However, this is rendered entirely pointless by the
legend not matching.

I can see the difficulties expressed above, but wonder about the following as a
compromise. Could a right-click option "Set legend to fill range" appear under
"Data ranges..." in the specific case of pie charts where a fill colour range
has been defined? Clicking this would cause the legend to be recreated based on
the fill colour range, i.e. to match the chart at that point in time. If
entries in the fill colour range then changed, the chart would become out of
sync with the legend - fine if people really think that's expected behaviour -
but the new option would at least give users the chance to set their legend
correctly in a two click (or three click if an explanatory confirm dialog
popped up) operation.

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