Legend entry for Box-Whisker series
lazarus / 55-TAChart

----------------------------------------------------------------------
wp · 2013-01-20 22:47

A box-whisker series shows for the legend symbol only a black-bordered
white box. If there are several box-whisker series in the same chart
it is not possible to distinguish them from their legend icon. Would
it be possible to paint the box at least using the BoxBrush and BoxPen
of the series? Ideally the icon should be a mini box/whisker symbol
using all corresponding pens and brushes.

----------------------------------------------------------------------
Ask · 2013-01-22 12:08

Done in r39933

----------------------------------------------------------------------
wp · 2013-01-22 23:22

Thank you, very nice. A few minor issues though (see attached modified
version of your demo):
The box-whisker series title is not displayed in the legend. The same
happens with a TChartListbox linked to the chart.If the series icon is
used in a TChartImageList the right whisker bar seems to be cut off
which looks a bit strange (maybe the drawing rect is too narrow by 1
pixel).Not sure if this does look good, but maybe there should be an
option to draw the icon vertically to match the box/whisker
orientation in the chart.

----------------------------------------------------------------------
Ask · 2013-01-24 05:12

Quotetitle is not displayed in the legend.
...the right whisker bar seems to be cut off
Should be fixed in r39944.

Quotean option to draw the icon verticallyI did not think it would
look good too.
I implemented that, but still have doubts about the look.
Please apply and test the attached patch
(set LegendDirection property, optionally set
Chart.Legend.FixedItemHeight to about 40).
Do you think it is worth committing?

----------------------------------------------------------------------
wp · 2013-01-24 23:04

Well I think it's not too bad. What makes it look strange is that the
whiskers extend across the entire SymbolWidth of the legend. I guess
it would look better if BoxWidth and WhiskerWidth in the symbol would
have the same values, or at least the same ratio, as in the chart; the
symbol should not be blown up across the full Symbolwidth.

When writing this I had the idea that there may be cases where the
boxes should extend horizontally, not vertically, in the chart. I
tested the AxisIndexX and AxisIndexY properties as with a bar series
-- and saw that this feature is already there. Great work.

----------------------------------------------------------------------
Ask · 2013-01-25 00:00

QuoteI think it's not too badOk, committed in r39960

Quotes it would look better if BoxWidth and WhiskerWidth in the symbol
would have the same values, or at least the same ratio, as in the
chartThey already have the same ratio.

Quote I tested the AxisIndexX and AxisIndexY properties as with a bar
series -- and saw that this feature is already there.Also note that
setting LegendDirection = bwlAuto will synchronize item rotation with
series rotation.