[SOLVED] Chidren item selection in a QGraphicsScene.

[issam]

Hi,
How to make selected items propagate selection to their parent items ? In other words, when i select a children item,
the parent item will be automatically selected ?

thanks.

[issam]

hi there :)

[Asperamanca]

You can reimplement QGraphicsItem::itemChange in your child item classes, detect the changed selection and change the 'selected' state of your your parent accordingly.

[issam]

Hi, you mean this :

@
Label::Label(QGraphicsItem * parent)
:QGraphicsSimpleTextItem(parent)
{
setFlags(QGraphicsItem::ItemIsMovable|
QGraphicsItem::ItemIsSelectable|
QGraphicsItem::ItemStacksBehindParent);
}

QVariant Label::itemChange (GraphicsItemChange change, const QVariant &value)
{
Place * place = qgraphicsitem_cast<Place *>(parentItem());

if (change == QGraphicsItem::ItemSelectedChange)
  place->setSelected(true);

else
place->setSelected(false);

return value;
}
@

[issam]

Ok, as you have said, before the site crash, this is the true code :

@
QVariant Rectangle::itemChange (GraphicsItemChange change, const QVariant &value)
{
if ((change == QGraphicsItem::ItemSelectedHasChanged) && (isSelected()))
parentItem()->setSelected(true);

return value;
}
@

it works well, thank you very much. :)