[Libreoffice-ux-advise] [Bug 150036] [Feature Request] Line connecting legend and chart (improving chart readability)

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=150036

--- Comment #6 from Stéphane Guillou (stragu) <stephane.guillou at libreoffice.org> ---
(In reply to Heiko Tietze from comment #5)
> Now I understand, you abuse the last data label as legend. This will very
> likely fail for many reasons (last data points are very close, inappropriate
> y scaling like logarithmic hides the last data point, reverse x direction,
> RTL, other chart types). But as you said, it's a workaround.
Indeed!
> We are talking about Legend > Properties > Position?
Either in Wizard > Chart Elements > Display legend, or in Insert > Legend >
Position
> >  ° Label the series
> It might be very welcome by the users but I don't see how we label series in
> a callout style for every type of chart and all situations.
True. Actually, I think what would be doable and simplest:

[X] Display legend
 ° Left
 ° Right
 ° Top
 ° Bottom
 [ ] Align with data

The last option (only available if Display Legend is on) would:
- for each series, take the x or y value of the data point closest to the
legend (depending on position option)
- use that value to position each corresponding legend entry
- offset them if there are overlaps
- update the position on each data or chart change
This should suit most charts (but there will always be visualisations where
such an option would not be useful, comes down to user choice).
And potentially an extra option to add "[ ] Leader lines" to the chart area's
edge. (Useful if position was offset for avoiding overlap.)

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