Re: GPL Problems

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Author: Kurt Granroth
Date:  
To: plug-discuss
Subject: Re: GPL Problems
On Thursday 30 September 2004 01:08 am, Nathan England wrote:
> One of the next things we want to do is develop some front ends. QT is our
> preffered method. Obviously we have to purchase a QT license, now I haven't
> researched it, so I'll start by asking this here.
> Do we need to purchase the license as a company to develop the code and
> sell it, or do we need to purchase a license to develop and a license for
> every copy sold? That would drastically raise the cost of our product.


The Trolltech website is pretty clear on such matters as it *is* their bread
and butter :-)

In short:
Trolltech does not sell a royalty (i.e., each copy needs a license) based
license for Qt. The licenses are tied to developers. So if your company has
5 people actively working on the Qt part of the code, then you'll need to get
5 licenses. There are actually three factors that determine how much the
licenses are going to be:
1. How many developers need licenses?
2. Are you developing for just Window, just X11, or both?
3. What "extra" features (like XML, DB, etc) do you need?

> I don't care for GTK+ much, so I would much rather go QT. Plus, a lot of
> our stuff would preferably run in KDE, so it's better integration, and
> since most KDE libraries are LGPL we are safe with them.


Same here. One thing to note, though: If Qt isn't an option due to its price
and you find yourself being pushed towards Gtk+, do yourself a favor and
check out wxWidgets. wxWidgets is a cross-platform C++ toolkit that compares
fairly favorably with Qt. It's not as polished, but it's FAR better than
most of the alternatives. It uses Gtk+ as the backend under X so you get all
of the benefits of Gtk+ without the horrific API.

Kurt
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