Prettier plotting
lazarus / 39-Graphics

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linnemann · 2014-10-27 19:09

Hello

I've been looking to a "prettier" alternative to the TAChart library.

There are a lot of neat libraries out there.

Can javascript libraries eg. Flotr2
http://www.humblesoftware.com/flotr2/ or Dimple http://dimplejs.org/
be used inside fpc/lazarus.

There are also CairoPlot http://cairoplot.sourceforge.net/ but it has
no bindings to pascal but exists for C.

Does anyone have an implementation that you are happy with?

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wp · 2014-10-27 20:14

What is it in particular that you don't like with TAChart? Do you know
http://wiki.lazarus.freepascal.org/BGRABitmap_tutorial_TAChart or
http://wiki.lazarus.freepascal.org/TAChart_Tutorial:_Background_design
which demonstrate you to brush up the charts by means of gradients
etc.

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marcov · 2014-10-27 20:24

Quote from: linnemann on October 27, 2014, 08:09:06 pmI've been
looking to a "prettier" alternative to the TAChart library.

There are a lot of neat libraries out there.

Can javascript libraries eg. Flotr2
http://www.humblesoftware.com/flotr2/ or Dimple http://dimplejs.org/
be used inside fpc/lazarus.

Afaik you can instantiate browsers within Lazarus programs, so why
not? If you are willing to work hard for it, it is no problem I guess.
QuoteThere are also CairoPlot http://cairoplot.sourceforge.net/ but it
has no bindings to pascal but exists for C.

That's worse, since it will require a whole bunch of external DLLs,
and you will have to carefully manage their versions. But bindings for
various Cairo and GTK libraries exist, so you can probably simply
translate it.

QuoteDoes anyone have an implementation that you are happy with?

I like TAChart, but afaik Steema also supports TChart (the full
product, a cut down version is packaged with Delphi) on Lazarus?

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wp · 2014-10-27 20:32

QuoteSteema also supports TChart on LazarusI know for the commercial
version at least. The last time when I saw it they still had issues
with design-time code, but run-time was very nice. It's not cheep
though...

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linnemann · 2014-10-28 18:11

QuoteWhat is it in particular that you don't like with TAChart? Do you
know http://wiki.lazarus.freepascal.org/BGRABitmap_tutorial_TAChart or
http://wiki.lazarus.freepascal.org/TAChart_Tutorial:_Background_design
which demonstrate you to brush up the charts by means of gradients
etc.
Hi I hadn't seen the the BGRABitmap plotting before.

I have no gripes about TAChart, its just as its not as nice looking as
some of the other plotting libraries I have used in other languages,
thats all.

QuoteAfaik you can instantiate browsers within Lazarus programs, so
why not? If you are willing to work hard for it, it is no problem I
guess.
Hadn't even thought about that.