[Qt-interest] QGraphicsItem Error

[varun singh]

hi,
Well I'm extremely sorry. It was my mistake. I overlooked
the fact that QGraphicsItem (exceptionally) doesn't inherit from QObject.
So, Q_OBJECT is wrongly placed there. Thanks Milton for your support.

-Varun
 
> --- On Tue, 11/8/09, varun singh <mailthatmale at yahoo.co.in>
> wrote:
> 
> > From: varun singh <mailthatmale at yahoo.co.in>
> > Subject: QGraphicsItem Error
> > To: qt-interest at trolltech.com
> > Date: Tuesday, 11 August, 2009, 11:04 PM
> > hi,
> > Please have a look at this code.
> > It spans over two files: a header file and a source
> file.
> > I'm pretty sure I have done the file inclusions
> properly,
> > there is no error in that.
> > 
> > Code:
> >
> **************************************************************************
> > 
> > class Tank : public QGraphicsItem
> > {
> >     Q_OBJECT
> > 
> > public:
> >     Tank();
> >     void paint(QPainter *painter, const
> > QStyleOptionGraphicsItem *option, QWidget *widget);
> >     QPainterPath shape() const;
> >     QRectF boundingRect() const;
> > 
> > private:
> >     QPixmap *mTank;
> > };
> > 
> > Tank::Tank()
> > {
> >     setFlags(ItemIsMovable);
> > }
> > 
> > void Tank::paint(QPainter *painter, const
> > QStyleOptionGraphicsItem *option, QWidget *widget)
> > {
> > 
> >     painter->drawPixmap(0, 0, 30, 50,
> > QPixmap(":/images/Tank.png"));
> > }
> > 
> > QRectF Tank::boundingRect() const
> > {
> >     return (QRect(0, 0, 35, 55));
> > }
> > 
> > QPainterPath Tank::shape() const
> > {
> >     QPainterPath p;
> >     p.addRect(boundingRect());
> >     return p;
> > }
> > 
> > 
> >
> **************************************************************************
> > 
> > The above code is giving the following error.
> > 
> > Error:
> >
> **************************************************************************
> > Starting: G:/Qt/2009.02/mingw/bin/mingw32-make.exe -w
> 
> > G:\Qt\2009.02\mingw\bin\mingw32-make.exe: Entering
> > directory `G:/Qt-Projects/Gui Appl/Tanks'
> > G:/Qt/2009.02/mingw/bin/mingw32-make.exe -f
> Makefile.Debug
> > mingw32-make.exe[1]: Entering directory
> `G:/Qt-Projects/Gui
> > Appl/Tanks'
> > g++ -c -g -frtti -fexceptions -mthreads -Wall
> -DUNICODE
> > -DQT_LARGEFILE_SUPPORT -DQT_DLL -DQT_GUI_LIB
> -DQT_CORE_LIB
> > -DQT_THREAD_SUPPORT -DQT_NEEDS_QMAIN
> > -I"..\..\..\Qt\2009.02\qt\include\QtCore"
> > -I"..\..\..\Qt\2009.02\qt\include\QtGui"
> > -I"..\..\..\Qt\2009.02\qt\include"
> > -I"..\..\..\Qt\2009.02\qt\include\ActiveQt" -I"debug"
> -I"."
> > -I"..\..\..\Qt\2009.02\qt\mkspecs\win32-g++" -o
> > debug\moc_tank.o debug\moc_tank.cpp
> > debug\moc_tank.cpp:39: error: `staticMetaObject' is
> not a
> > member of `QGraphicsItem'
> > debug\moc_tank.cpp: In member function `virtual void*
> > Tank::qt_metacast(const char*)':
> > debug\moc_tank.cpp:53: error: `qt_metacast' is not a
> member
> > of `QGraphicsItem'
> > debug\moc_tank.cpp: In member function `virtual int
> > Tank::qt_metacall(QMetaObject::Call, int, void**)':
> > debug\moc_tank.cpp:58: error: `qt_metacall' is not a
> member
> > of `QGraphicsItem'
> > mingw32-make.exe[1]: Leaving directory
> `G:/Qt-Projects/Gui
> > Appl/Tanks'
> > G:\Qt\2009.02\mingw\bin\mingw32-make.exe: Leaving
> directory
> > `G:/Qt-Projects/Gui Appl/Tanks'
> > mingw32-make.exe[1]: *** [debug/moc_tank.o] Error 1
> > G:\Qt\2009.02\mingw\bin\mingw32-make.exe: *** [debug]
> Error
> > 2
> > Exited with code 2.
> > Error while building project Tanks
> > When executing build step 'Make'
> >
> ***************************************************************************
> > 
> > This error is a total mystery to me. All I know that
> it has
> > something to do with QGraphicsItem. Seeking for help.
> > 
> > -Varun
> > 
> 
> 
> 
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