Friday 10 March 2006 04:05 Rajan, Vivek K wrote:
> We have a legacy CAD application written in TCL/TK - it is a huge
> application, with lots of widgets, canvas, bind-keys, pull-down menus,
> pop-up windows, tabs, etc.
> We have a new CAD application which is written in QT - it also has lots
> of widgets, canvas, bind-keys, pull-down menus, and such.
This is not an answer to your question, but just my opinion on what situation
you are headed for.
I have previously been on a fairly big project where we had an old Windows MFC
system integrated into the new Qt solution. The idea with this was that we
would have something that actually worked, while the process of rewriting
everything went on.
Technically, there was nothing wrong with this. It did indeed run, and it did
function as intended. But there were two really big problems involved:
- usability sucked! It was almost impossible for non-technical users to
understand what was wrong with the application when they went to the old
part. It turned out to be impossible to make a look-and-feel that actually
made the application usable during the transition
- we had to spend *a lot* of time writing glue code. It's one thing to
integrate a legacy application into a new one. But when you keep driving the
border between these two, this problem goes off the scale. It's incredibly
difficult to end up with a sound design, when some of your data is always
present in the old part of the application
For these two reasons, it was eventually decided that we just had to take the
plunge and do the full Qt conversion in one big step. And that turned out to
be a really good decision.
So, if this is the situation you are thinking about going for, remember that
it will take you a lot longer time to do it this way than to do the rewrite
in one big step. And there are problems with this path that potentially leads
to a weaker application.
Thorsen Consulting ApS - Qt consulting services
To unsubscribe - send a mail to qt-interest-request@xxxxxxxxxxxxx with
"unsubscribe" in the subject or the body.
List archive and information: http://lists.trolltech.com/qt-interest/