How to make a list of QGraphicsItems on the scene

[Holy]

hi,
I 'm trying to make a queue of QGraphicsRectItems on the scene after have moving each of them forwards .I used the QGraphicsItemGroup but i cannot run it.
may someone help me to solve this problem please?
thanks in advance.
the code looks like this:


Container.h

class Container: public QGraphicsRectItem
{
Q_OBJECT
public:
Container(QGraphicsItem* parent=0, int x, int y);
void advance();
private:
QGraphicsItemAnimation *anim;
QTimeLine * timeline;
};

class Container: public QGraphicsRectItem
{
Q_OBJECT
public:
Container(QGraphicsItem* parent=0, int x, int y);
void advance();
private:
QGraphicsItemAnimation *anim;
QTimeLine * timeline;
};

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Container.cpp

#include"container.h"
 
Container::Container(QGraphicsItem* parent, int x=0, int y=0):QGraphicsRectItem(parent)
{QColor color(0,0,100);
Qpen p(color);
p.setWidht(2);
QBrush(brush);
setRect(x,y,100,60);
show();
 
}
 
Container::advance(){
 
 
anim= new QGraphicsItemAnimation();
timeline= new QTimeLine(5000);
anim->setItem(this);
for (qreal i=0.0;i<500.0;i++){
anim->setTranslationAt(i/500.0,0.0,i);
}
anim->setTimeLine(timeline);
timeline->setDirection(QTimeLine::Backward);
timeline->setUpdateInterval(1000/10);
timeline->setLoopCount(1);
timeline->setDuration(50000);
 
}

#include"container.h"

Container::Container(QGraphicsItem* parent, int x=0, int y=0):QGraphicsRectItem(parent)
{QColor color(0,0,100);
Qpen p(color);
p.setWidht(2);
QBrush(brush);
setRect(x,y,100,60);
show();

}

Container::advance(){


anim= new QGraphicsItemAnimation();
timeline= new QTimeLine(5000);
anim->setItem(this);
for (qreal i=0.0;i<500.0;i++){
anim->setTranslationAt(i/500.0,0.0,i);
}
anim->setTimeLine(timeline);
timeline->setDirection(QTimeLine::Backward);
timeline->setUpdateInterval(1000/10);
timeline->setLoopCount(1);
timeline->setDuration(50000);

}

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MainGui.h

class MainGui: public QWidget
{
public:
MainGui(...);
private:
QGraphicsScene *scene;
QGraphicsItemGroup* itemGroup;
};

class MainGui: public QWidget
{
public:
MainGui(...);
private:
QGraphicsScene *scene;
QGraphicsItemGroup* itemGroup;
};

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MainGui.cpp

#include "container.h"
 
Container*c1= new Container (0,0,0);
Container*c2= new Container (0,0,0);
 
scene= new Scene(this);
itemGroup= scene->createItemGroup(scene->selectedItems());
c1->advance();
itemGroup->addToGroup(c1);
c1-> setZValue(405.0);/*I'm trying to separate the RectItems so that their do not overlap because i want them to be range in a queue. into the scene.*/
 
c2->advance();
itemGroup->addToGroup(c2);
c2-> setZValue(400.0);

#include "container.h"

Container*c1= new Container (0,0,0);
Container*c2= new Container (0,0,0);

scene= new Scene(this);
itemGroup= scene->createItemGroup(scene->selectedItems());
c1->advance();
itemGroup->addToGroup(c1);
c1-> setZValue(405.0);/*I'm trying to separate the RectItems so that their do not overlap because i want them to be range in a queue. into the scene.*/

c2->advance();
itemGroup->addToGroup(c2);
c2-> setZValue(400.0);

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