[Qt-jambi-interest] [Resolved] RE: Subclassing QLayout & QNoNativeResourcesException

[Frank Bergmann]

I'm afraid I failed using the generator, and so currently I'm implementing
the whole of Qwt. I don't mind sharing once I have a more completed product.
However again the disclaimer: I'm using C#, that is a translated version of
QtJambi: 

http://code.google.com/p/qt4dotnet/

Frank

> -----Original Message-----
> From: Helge Fredriksen [mailto:hf at poseidon.no]
> Sent: Friday, December 11, 2009 11:49 AM
> To: Frank Bergmann
> Cc: qt-jambi-interest at trolltech.com
> Subject: Re: [Qt-jambi-interest] [Resolved] RE: Subclassing QLayout &
> QNoNativeResourcesException
> 
> Dear Frank,
> 
> Very interesting that you are working on porting Qwt using Qt Jambi!
> Are you using the Qt Jambi generator to achieve this? Would it be possible
> for you to share this work with the community? It would really be a great
> enhancement for the project.
> 
> Another great component to have available for Qt Jambi is Marble, which
I'm
> quite eager to get going with (once I have time, which is something of a
> sparse resource these days).
> 
> Regards,
> Helge Fredriksen
> 
> Frank Bergmann wrote:
> > Thank you so much for the example. I'm actually working on a port of
> > Qwt for C#. And I felt bad posting C# code to what essentially is a java
list.
> > Anyway, I just ported over your example and it works just fine, so at
> > least I now know that the problem is not the subclassing of the
> > layout. After seeing your example I added a new method to my layout:
> >
> > public void addWidget(QWidget widget, int magic)
> >         {
> >             addChildWidget(widget);
> >             addItem(new QWidgetItem(widget));
> >         }
> >
> > And this magically resolved all my issues. I still think it should not
> > have been necessary though.
> >
> > Anyway ... thanks again
> >
> > Frank
> >
> >
> >> -----Original Message-----
> >> From: qt-jambi-interest-bounces at trolltech.com
> >> [mailto:qt-jambi-interest- bounces at trolltech.com] On Behalf Of Lists
> >> Sent: Thursday, December 10, 2009 4:54 AM
> >> To: qt-jambi-interest at trolltech.com
> >> Subject: Re: [Qt-jambi-interest] Subclassing QLayout &
> >> QNoNativeResourcesException
> >>
> >> Hi!
> >>
> >> It's hard to find an error without posting your code :)
> >>
> >>
> >> Attached you can find a BorderLayout implementation.
> >>
> >> It's part of the QT implementation from the JVx Enterprise
> >> Application Framework.
> >>
> >> It's still in development, but it's open source (Apache 2.0 licence)
> >> and maybe the class will help you as template?
> >>
> >> The referenced classes are not included, but i think that's not a
> >> problem
> >>
> > for
> >
> >> you.
> >>
> >>
> >>
> >>> -----Ursprüngliche Nachricht-----
> >>> Von: qt-jambi-interest-bounces at trolltech.com
> >>> [mailto:qt-jambi-interest- bounces at trolltech.com] Im Auftrag von
> >>> Frank Bergmann
> >>> Gesendet: Donnerstag, 10. Dezember 2009 01:28
> >>> An: qt-jambi-interest at trolltech.com
> >>> Betreff: [Qt-jambi-interest] Subclassing QLayout &
> >>> QNoNativeResourcesException
> >>>
> >>> Hello,
> >>>
> >>> I had to implement a custom Layout but somehow things just don't
> >>> work as planned, directly after adding an item to the layout, like so:
> >>>
> >>> contentsWidget.layout().addWidget(legendItem);
> >>>
> >>> and verifying by debugging addItem(QLayoutItemInterface item), that
> >>> everything is fine on my end (I even made sure that itemAt(index)
> >>> within my Layout class would return the right thing). However as
> >>> soon as the addWidget call completes, I'm in trouble:
> >>>
> >>> contentsWidget.layout().itemAt(0).widget()
> >>>
> >>> returns with a com.trolltech.qt.QNoNativeResourcesException. (And
> >>> that even though my legendItem is still just fine.) The message that
> >>> I get
> >>> is:
> >>>
> >>> "Function call on incomplete object of type:
> >>> com.trolltech.qt.gui.QLayoutItem$ConcreteWrapper"
> >>>
> >>> Which is not at all helpful. As final straw I turned to the
> >>> documentation:
> >>>
> >>> http://qt.nokia.com/doc/qtjambi-4.5.2_01/index.html
> >>>
> >>> which hints at implementations of a BorderLayout and FlowLayout
> >>> example, however
> >>>
> >>> http://qt.nokia.com/doc/qtjambi-4.5.2_01/com/trolltech/qt/layouts-
> >>> borderlayo
> >>> ut.html
> >>> http://qt.nokia.com/doc/qtjambi-4.5.2_01/com/trolltech/qt/layouts-
> >>> flowlayout
> >>> .html
> >>>
> >>> both are not very informative. I hope I can find some clues here,
> >>>
> >>> cheers
> >>> Frank
> >>>
> >>> _______________________________________________
> >>> Qt-jambi-interest mailing list
> >>> Qt-jambi-interest at trolltech.com
> >>> http://lists.trolltech.com/mailman/listinfo/qt-jambi-interest
> >>>
> >
> >
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