Qt vs. Eclipse RCP

[Perseval]

Hello !
I have just finshed a small project with Qt, and now I have to transfer a big C/Motif application to a multi platform GUI to work on Windows/Linux.
Qt is a nice solution, but I have to justify this choice to my boss and my colleagues against Eclipse RCP, which is free. Not so easy without trying it
Is there anybody here who has some strong argument (technical and/or financial) ?
Many thanks.

[jacek]

Qt is easy to learn and has a great documentation. Just compare it with RCP/SWT docs. If you don't know RCP, SWT and JFace, will you be able to learn it? If you know C++ well, you can learn Qt much faster. Would you write a big application using framework you don't know?

RCP uses SWT, which means that you have to invoke dispose() method very often, and if you forget one you'll get a resource leak. In Qt widgets clean up themselves. On the other hand RCP gives you a bit more --- a whole structure for your application.

[jacek]

One more thing: http://www.trolltech.com/products/qt/migrate/motif.html

[Rayven]

For the company I work for, we are having the same discussions about Eclipse vs Qt, and I definatly agree with the points that jacek made. If your company has definate limitations on money, Eclipse is probably the way to go. There are numerous plugins to Eclipse for a variety of uses already prebuilt. That being said, there is more flexibilty with being able to migrate Motif code into Qt, which I an doing currently. Usually this decision comes down to a financial problem, in which Eclipse wins out.

[Perseval]

Thanks Jacek & Rayven for your quick answer
Using QMotif to migrate progressively could be a good solution that Eclipse doesn't provide. I will explore it.
Thanks again