Where to find documentation for TAChart and components
lazarus / 55-TAChart

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worldttle · 2021-02-07 06:01

Sorry for newbie question, just started working with TAChart.

Where do I find a complete list of the TAChart components with their
properties, procedures and functions?

For example, how do I clear a chart between plots?  How do I add a
break in a plot when using LineSeries.AddXY?

Thanks.

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jwdietrich · 2021-02-07 08:25

There is extensive documentation in the wiki.

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wp · 2021-02-07 09:23

Quote from: worldttle on February 07, 2021, 07:01:35 amWhere do I find
a complete list of the TAChart components with their properties,
procedures and functions?
The only "complete" list is the source code: Drop a TChart on the
form, go to the editor window and click on the "TChart" identifier
with the CTRL key pressed. This opens the unit in which TChart is
implemented. (This works with any other identifier, BTW). Scroll down
to the public section and you see all procedures and public
properties, a bit further down in the published section you find the
properties and events accessible from the object inspector.

The "most complete" documentation is the 50-page chapter that I wrote
for the Lazarus Handbook. Close to that is the wiki article
https://wiki.lazarus.freepascal.org/TAChart_documentation.

Quote from: worldttle on February 07, 2021, 07:01:35 amFor example,
how do I clear a chart between plots? 
I don't know what you mean by "between plots". But you can clear a
series by calling its Clear method.

Quote from: worldttle on February 07, 2021, 07:01:35 amHow do I add a
break in a plot when using LineSeries.AddXY?
Use NaN ("not a number") as y value.

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worldttle · 2021-02-07 15:32

Thank you.  That helps.