Re: [Opencfd-develop] GUI toolkits

[Daniel L. <dan...@ho...>]

Hi guys.

Please send all emails to ope...@li... no need to 
include my email on there as well because Im already subscribing to this 
list so I'm receiving every email twice!

Here is an email response I got from Trolltech regarding licensing.....
*******************************************************************
>Is the Qt Edition Free Licensing available for MS Windows?

No I am afraid not.

>If I write an application using the Linux Qt Edition Free Licensing can I
>then compile and distribute my program for MS Windows using the same 
>licensing model?

No this is not possible with Qt/X11 under the GPL license.

I am afriad the only way for you to produce Windows executables is with
a commercial Windows license, and due to the terms of the Windows
license, you can not use the Qt/X11 GPL license with the commercial
Qt/Windows license.
*******************************************************************


On the MFC side of things.

A .net has nothing to do with MFC. WindowsForms API has replaced MFC in the 
.net framework.
B .net framework (you pay $$ VS.net) is free to download and distribute
C. To use MFC, yes you do need a license for Visual C++ 6.0 or greater 
(VS.net). I

I overlooked that most developers will not have access to Visual C++, so I 
agree with Anton that an perhaps an alternative would be better.

-Daniel


From: Anton Kulchitsky <an...@ku...>
To: Daniel Labrosse <dan...@ho...>
CC: ope...@li...
Subject: Re: [Opencfd-develop] GUI toolkits
Date: Wed, 25 Aug 2004 09:15:12 -0800

The last thing. Sorry...

MFC is not acceptable for the open source project. Indeed, if QT is GPL'd 
for Linux (or free windows project, please read the licence!) MFC is never 
and will be never licensed for free usage. You have to buy .Net toolkit and 
so on still. That license is expensive.

Finally, MFC and GPL together is nonsense!

Anton

Daniel Labrosse wrote:

>Hi guys,
>
>I've thought about using this WxWidgets (formerly WxWindows) GUI toolkit 
>some time ago but my gut feelings are as follows....
>
>1. Never used it so it’s a learning curve
>2. I'm not sure how stable it is and I don’t know any commercial projects 
>written in it.
>3. If we agree to use Open Cascade, it has out of the box support MFC and 
>QT not WxWidgets
>
>Personally, I think at this stage platform independence is minor issue. The 
>sooner we get coding the quicker we will get a prototype working. I’ve also 
>looked at using Java for the GUI but I’m reluctant to start using it since 
>most of the engine will be coded in C++ and JNI bridging/JVM 
>incompatibilities will only cause headaches. So C++ is definitely the way 
>to go!
>
>I think we should use either QT or MFC for the GUI. Here are my pros and 
>cons or both:
>
>MFC Pros:
>Stable toolkit,
>Used everywhere,
>Knowledge base: There are hundreds of MFC developers out there so it’ll be 
>easy to recruit developers. Also, I’m currently developing an MFC 
>application where I work!
>
>MFC Cons:
>You are locked into using windows
>
>QT Pros:
>Stable toolkit
>Better design than MFC
>Cross platform
>
>QT Cons:
>Free Licensing is only available to Linux, which effectively locks us into 
>using Linux and alienates approximately 80% of our potential users.
>
>
>If we get a prototype up and running using MFC then in the future we can 
>port our code to Linux toolkit. For now, the most important thing is to get 
>working version up and running! Let me know what you guys think.
>
>-Dano
>
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