Small harmless warning: instance variable @callbacks not initialized

[rubyFeedback]

Hey there kojix2!

I am checking on libui every now and then and noticed you added a new release lately.

I also saw the histogram.rb example - really great! \o/ (I would not know how to do the
same in ruby-gtk for example).

Anyway - this is just a small report.

In the last 0.0.8 gem I get this warning:

libui-0.0.8/lib/libui.rb:50: warning: instance variable @callbacks not initialized

Perhaps @callbacks can be initialized to nil or some other value. Thanks!

[kojix2]

Hi @rubyFeedback

Thank you for your report.
I don't see this error in my environment.
So I don't know if this problem has been fixed, but I have replaced the code with one that does not seem to show the error.

Thank you

517584f

[kojix2]

I also saw the histogram.rb example

Thanks for looking at the histogram example.
But It is not my original. This example is ported from libui-ruby.
Writing Ruby code with garbage collection in mind is not a good experience.
There are many things that need to be improved.

Since Ruby/GTK has Cairo, I think it is easier to create this kind of code than LibUI.
Also, how to display images in LibUI is still not clear to me...
With Ruby/GTK, you can create something like this

https://github.com/kojix2/Gray-Scott

If you want to display a chart in GUI, you can use GR.rb with GTK. See the following example.

https://github.com/red-data-tools/GR.rb/blob/main/examples/gtk.rb

[kojix2]

Released a new version that includes this change.
Thank you for your reporting!