Qt Scaling Custom QGraphicsItem with unscaled text - c++

Question

I'm trying to create customObject (rectangle and it inherit from QGraphicsItem) that will be painted on scene with ceratin text(stored in attribute), but when I scale it - i wish to keep same size of text. Here is my over. paint function:
void CustomRectangle::paint(QPainter *painter, const QStyleOptionGraphicsItem *options, QWidget *widget)
{
QColor currentColor = get_ColorByCurrentState();
QRectF rect = boundingRect();
QPen pen(currentColor, Own_LineWidith);
painter->setPen(pen);
painter->drawRect(rect);
QRectF rect_text(rect.x(), rect.y(),100,100);
painter->drawText(rect_text,this->getText() );
}
and my two scaling functions:
void CustomObject::scaleUp()
{
scale(ScaleFactor_X,ScaleFactor_Y);
}
void CustomObject::scaleDown()
{
scale(1/ScaleFactor_X,1/ScaleFactor_Y);
}
But text still keep scaling along with rectangle.
EDIT 1
I tried adding it another way, i nfucntion that creates and adds my rectangle to scene (here - named "newObject"), but result is still the same.
QGraphicsTextItem* GTI = new QGraphicsTextItem(newObject->toStringForScene(), newObject);
I'm beginign to think that I shoud create each text object as separeted object and save it different list. Ofcours, i would have to update it then, whenever it's object moved.

Answer 1

Try this:
QGraphicsTextItem* gti = new QgraphicsTextItem("text");
gti->setFont(QFont("Arial", 18));
// this is important
gti->setFlag(QGraphicsTextItem::ItemIgnoresTransformations, true);
scene->addItem(gti);
The QGraphicsItem::ItemIgnoresTransformations flag prevents your graphics item to be scaled when you scale your view (QGraphicsView).
That means that you need a separated item for rendering text. But it can be a child item of your rectangle item.

Answer 2

I resolved this with QGraphicsTextItem's poitner as class's attribute.
QGraphicsTextItem* GTI;
I initialzie it in constructor:
GTI_Description = new QGraphicsTextItem(this->toStringForScene());
and then I call function to updated it's X and Y:
void updateTextPosition()
{
GTI->setX( this->x() );
GTI->setY( this->y() );
}
and to add it to the scene:
addTextToScene(DragScene* _scene)
{
updateDescriptionPosition();
_scene->addItem(GTI_GTI);
_scene->update();
}
Then i just call updateTextPosition() whenerver I change positions (in my mouseRelease event's handler).