Hi
Yeah Qt has different license for windows version of Qt. Qt is a high level
API for creating GUI which is generally based on the lower APIs of a
particular system. For example the Linux version of Qt is based on X11 libs &
Mottif , the Mac OS X version on Darwin & windows version on Win SDK 32 &
MFC.
So though the front APIs are same for all the above versions they depends on
different native lower APIs that is why Qt has different versions for
different platform
But since the front APIs are same a program written following the main Qt
APIs will run on different platforms only thing required is a re compilation
to the native platform.
That is why though Linux & Mac versions of Qt are GPLed the windows version is
not & there is a effort going on to port the GPLed version of Linux Qt to
Windows platform.
For more info please refer to the book Programming with Qt by Matthias Kalle
Dalheimer by O'Reilly.
Anirban Biswas
On Wednesday 25 Feb 2004 11:35, Pankaj Kaushal wrote:
> Sandip Bhattacharya wrote:
> > Hi!
> >
> > I was browsing around for a good python IDE when i hit upon Eric
> > (http://www.die-offenbachs.de/detlev/eric3.html). Then something hit me
> > in the eye when i looked up the project description.
> >
> > =======================================
> > In order to use eric3 under Win... operating systems you need a
> > commercial or educational license of Qt 3.x from Trolltech and the
> > corresponding license of PyQt (which includes QScintilla) from Riverbank.
> > =======================================
> >
> > My question is, why does *using* an open source product based on GPL'ed
> > QT, require a commercial license? After all, I am not using the library
> > in an application which i am selling?
> >
> > Does that mean that any GPL'ed code based windows application cannot be
> > used for commercial purposes?
>
> The GPL and the commercial versions are identical code-wise. The only
> difference is in the licensing.
>
> You can develop Qt software free of charge if the software you develop
> is released under the GPL license. If you develop closed source
> software, Trolltech offers commercial licenses.
>
> See also
> Stallman on GPL and QT.
> http://linuxtoday.com/news_story.php3?ltsn=2000-09-05-001-21-OP-LF-KE
>
>
> Cheers!
> Spoonman
>
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