Is TAChart still developed?
lazarus / 55-TAChart

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CM630 · 2018-06-05 21:36

I used to use TAChart extensively until I stopped 3 years ago. At that
time its development was almost ended. I just wonder if it is still
developed?

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wp · 2018-06-05 22:06

Like any other software which reaches some kind of maturity TAChart
advances in smaller steps now, but it is still being developed. Look
at the release notes of Laz 1.8
(http://wiki.freepascal.org/Lazarus_1.8.0_release_notes#TAChart) and
the planned Laz 1.10
(http://wiki.freepascal.org/Lazarus_1.10.0_release_notes#TAChart) for
some new features. Or look at the svn log messages and you'll see a
lot of activity still today.

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valdir.marcos · 2018-06-05 22:24

Quote from: wp on June 06, 2018, 12:06:09 am... and the planned Laz
1.10 (http://wiki.freepascal.org/Lazarus_1.10.0_release_notes#TAChart)
...Just curious.
Lazarus next version will be 1.10 or 2.0?

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CM630 · 2018-06-08 06:57

I had a serious problem with TAChart: I could not make left position
of the Chart fixed. Chart autoresized depending on LeftAxis Caption
and Range.
Maybe it is possible now?

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wp · 2018-06-08 09:25

Yes, I remember this discussion...

Every axis has a LabelSize property now. Any value > 0 determines the
distance, in pixels, between the axis (well, the tick marks, to be
precise) and the title (or edge of the chart if the axis title is not
visible). See also: http://wiki.lazarus.freepascal.org/TAChart_documen
tation#Axis_LabelSize

I see in your screenshot that the y axis title of the center chart is
multlined. You'll jhave to add an empty line to the title of the other
charts as well in order to give the title the same horizontal width.

Have a look at attached demo.

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CM630 · 2018-06-08 10:42

Thanks,
I could not understand what is LabelSize. Maybe it is what is shown in
the attached image?

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wp · 2018-06-08 11:20

No, look at my drawing
Chart.MarginsExternal: margin around the entire chart, similar to
BorderSpacing, but accessible for painting. Was added to avoid that in
unfavorable cases the last x axis label (which is close to the chart's
right edge) is truncatedChart.LeftAxis.Margin: spacing between the
left-most part of the left axis and the left edge of the
chartChart.LeftAxis.Title.Margins.Top: distance between the "top" of
the axis title text and the axis title border. Note that "top" refers
to the unrotated title. Similarly there is a
Chart.LeftAxis.Title.Margins.Bottom.Chart.LeftAxis.Title.Distance:
Distance between the rightmost part of the axis title and the left-
most part of the y axis labelsChart.LabelSize: if > 0 the width
reserved for the axis labels (auto-calculated if
0).Chart.Margins.Left: Distance between the axis line and the left-
most data-point.

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CM630 · 2018-06-08 13:10

Okay, everything seems clear now.
Thanks once again!

Edit: I added this image in Wiki.