Hi,

  I just tested in GTK 2.20 and it worked ok with

IupSetAttribute(dialog,"OPACITY","128");

  Notice that a value of "1" is almost fully transparent.

  The new C++ api will be a complement, not a replacement.

Best,
Scuri


On Thu, Jun 30, 2016 at 1:00 AM, anon anon <[email protected]> wrote:

> using linux with gtk version greater than 2.12. compiles fine but opacity
> does not work. i didnt see anything about it on to do list etc. so im
> asking here. i didnt try to reproduce it on a different machine. anyone
> else have this problem? question not related: is iup 4.x going to support C?
>
> my C code:
> IupSetAttribute(dialog,"OPACITY","1");
>
>
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