[Qt-interest] QtStateMachine Dependency on QtQui

[Sean Harmer]

Hi,

Looking at the Qt source I see that some state machine classes are part of the 
GUI lib. In particular these files:

qbasickeyeventtransition.cpp
qbasickeyeventtransition_p.h
qbasicmouseeventtransition.cpp
qbasicmouseeventtransition_p.h
qguistatemachine.cpp
qkeyeventtransition.cpp
qkeyeventtransition.h
qmouseeventtransition.cpp
qmouseeventtransition.h

Do you use any of the contained classes in your code?

The attached trivial application shows that it works here without linking to 
QtGui. Start from a small example and work your way up to see what it is that 
is bringing in your dependency on the QtGui lib.

HTH,

Sean

On Wednesday 28 Oct 2009 15:12:47 Will Rutherdale (rutherw) wrote:
> Hi.
> 
> I attempted to bring QtStateMachine into some embedded code that uses
> only QCoreApplication and doesn't touch gui classes.  The .pro file
> contains the line
> QT -= gui
> 
> It worked so far as I tested it in a Fedora environment.  However,
> bringing it onto an embedded platform exposed a problem.
> 
> That embedded platform does not have the Gui part of Qt installed.  The
> build broke, because linking with the QtStateMachine library brought in
> a dependency on part of the QtGui module.  There is a (hidden?  Or maybe
> I just missed it) dependency between QtStateMachine and QtGui.
> 
> Version details:  I am using Qt 4.5, with QtStateMachine downloaded in
> source-code form from the Qt add-on products web site.  (I haven't
> switched to Qt 4.6 at this point, which I know includes QtStateMachine
> as a module.)
> 
> Does anyone know why this dependency exists and what can be done about
> it?
> 
> -Will
> 
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