QWinWidget and evaluation version

**KoenTanghe** · 19th November 2007, 09:59

Hi,

I recently downloaded an evaluation version of Qt 4.3.2, to see if Qt would be a suitable framework to start migrating an older win32-based application of a client of mine to a more object-oriented and richer framework like Qt.

The goals under investigation are:
1. integration of Qt-based windows/panels into an existing win32 application (for the newer things)
2. maybe a full change-over to Qt in due time in order to be ready for potential Mac support

However, it seems that I can not evaluate this because I don't have the QWinWidget in this evaluation version. So, this evaluation seems to be useless for me.
Is there any way I can obtain the migration classes so I can see if Qt is a possible solution for my client?

I already contacted TrollTech directly, but have not received an answer yet.

K

**wysota** · 19th November 2007, 10:07

What do you need QWinWidget for?

**KoenTanghe** · 19th November 2007, 17:57

I need QWinWidget so that I can evaluate this:
http://doc.trolltech.com/solutions/4...winwidget.html
and this
http://doc.trolltech.com/solutions/4...2-example.html
in an existing application that uses win32.
As said in my previous post, the aim is to mix-and-integrate new Qt windows with an existing win32-based application, and from the TrollTech/Qt docs it looks like this QWinWidget class is exactly written for that purpose. But I'd like to do some tests first.

Also, while we're at it: is it possible to write new Qt-based GUI parts that are separated in a .dll, and then call the entry points of that .dll from the main win32-based application? If so, does that require changes in project settings/compiler/linkage settings of the main win32-based application?

Koen

**wysota** · 19th November 2007, 18:31

Originally Posted by KoenTanghe

I need QWinWidget so that I can evaluate this:
http://doc.trolltech.com/solutions/4...winwidget.html
and this
http://doc.trolltech.com/solutions/4...2-example.html
in an existing application that uses win32.

You misunderstood me - I know what QWinWidget is. I meant to ask, what do you want to do with it...

As said in my previous post, the aim is to mix-and-integrate new Qt windows with an existing win32-based application, and from the TrollTech/Qt docs it looks like this QWinWidget class is exactly written for that purpose. But I'd like to do some tests first.

I'm afraid you need a commercial licence with access to Solutions for that...

Also, while we're at it: is it possible to write new Qt-based GUI parts that are separated in a .dll, and then call the entry points of that .dll from the main win32-based application?

Yes, it's possible. The only thing you have to worry about is to have a QApplication instance created somewhere once in the dll.

If so, does that require changes in project settings/compiler/linkage settings of the main win32-based application?

No, I don't think so. You'll get a regular dll, so everything what applies for using dlls is correct here as well. Just don't export any Qt objects outside the dll or you'll have trouble with the headers - they usually need proper macros defined.