[Qt-interest] Adding custom widget plugins error/problem

[miroslav]

Hi All,

unfortunately am still having a problem. 
The point is that when I create a library (*.so) from the QtCreator
example - worldtimeclock, everything was compiled OK.

Question is that what everything I have to do to plug it to for example
a MainWindow.

1 - move it to Qcreator/designer/plugin folder (or other appropriate
path)
2 - restart QtCreator
3 - move the new plugin to your MainForm - in the designer view (this is
what I have already done)
4 - copy appropriate header file
5 - WHAT ELSE? 
   - do I have to include the lib file also in the *.pro file?
   - some special code in the MainFrame?



I have added the include in the *.pro file and now I'm not getting build
errors, but when I execute the application I'm ending up with:
"error while loading shared libraries: libworldtimeclockplugin.so:
cannot open shared object file: No such file or directory"

Is costom widget plugin a shared library? 

Thank you in advance,... ;o)

Miroslav



On Tue, 2009-03-10 at 19:45 -0700, Malyushytsky, Alex wrote:
> It looks like compiler complains on  WorldTimeClock::WorldTimeClock(QWidget*)
> 
> You need constructor taking QWidget* of WorldTimeClock  class as a parameter not QObject* of WorldTimeClockPlugin, which is fine.
> 
> Something like this:
> 
> WorldTimeClock::WorldTimeClock (QWidget *parent)
> : QWidget(parent)
> {
> .....
> }
> 
> You either missing include , in this case find which file has this definition ( even if it was generated ) and add appropriate include.
> 
> Or you forgot to declare / define this constructor in your code.
> 
> 
> Regards,
>    Alex
> 
> -----Original Message-----
> From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of miroslav
> Sent: Tuesday, March 10, 2009 5:13 AM
> To: Andreas Pakulat
> Cc: qt-interest at trolltech.com
> Subject: Re: [Qt-interest] Adding custom widget plugins error/problem
> 
> Hi,
> 
> the custom widget constructor is specified here:
> 
> WorldTimeClockPlugin::WorldTimeClockPlugin(QObject *parent)
> : QObject(parent)
> {
> initialized = false;
> }
> 
> 
> Please, where should I initialize the constructor? I'm designing
> (importing custom widgets) via designer in QtCreator. That is making
> ui_*.h file - that I can not modify.
> 
> thnks,
> Miro
> 
> 
> 
> 
> 
> 
> On Tue, 2009-03-10 at 11:14 +0100, Andreas Pakulat wrote:
> > On 10.03.09 11:05:02, miroslav wrote:
> > > Hi,
> > >
> > > thanks for the reply,...but....please can you give me more hints?
> > > Constructor where/what? In the main window where I want to have the
> > > CustomWidgetPlugin?
> >
> > Your custom widget has a constructor and that one needs to have QWidget*
> > parameter as first, passing it on to its parent class. Looking again at
> > your error message, you might even have that constructor declared, but
> > didn't implement it.
> >
> > Andreas
> >
> 
> On Tue, 2009-03-10 at 10:27 +0100, Andreas Pakulat wrote:
> > On 10.03.09 09:52:59, miroslav wrote:
> > > Hi All,
> > > please can you help me with this?
> > >
> > > I have compiled the worldtimeclockplugin and placed it into
> > > QtCreator/Designer folder.
> > >
> > > When I move it to my form and compile it I'm getting following
> error:
> > >
> > > /media/disk/01_SourceCodes/05_VFST/src/ui_VFST.h:80: undefined
> reference
> > > to `WorldTimeClock::WorldTimeClock(QWidget*)'
> > > :-1: error: collect2: ld returned 1 exit status
> > >
> > >
> > > On line 80: was generated following code:
> > > worldTimeClock = new WorldTimeClock(centralWidget);
> > >
> > >
> > > Please do you know that what can be the problem?
> >
> > You didn't specify a constructor for your custom widget usable for the
> > generated code. You have to supply a constructor taking a QWidget*
> > argument, just like QWidget and QWidget derived classes in the Qt API
> do.
> >
> > Andreas
> >
> 
> 
> 
> 
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