[Qt-interest] How Can I use ListView to show QIcons ?

[Kermit Mei]

On Wed, 2009-06-24 at 11:24 +0200, Alessandro Portale wrote:
> Kermit Mei schrieb:
> > On Wed, 2009-06-24 at 10:36 +0200, Alessandro Portale wrote:
> >> Kermit Mei schrieb:
> >>> QVariant ListModel::data(const QModelIndex &index, int role) const {
> >>>   if(index.isValid())
> >>>     return QVariant(icons.at(index.column()));
> >>>   else
> >>>     return QVariant();
> >>> }
> >> You need to consider the data role. Only return an icon, when role == 
> >> Qt::DecorationRole.
> >>
> >> Alessandro
> > 
> > Yes,I see. Thanks you all to help me.
> > 
> > But, I always can't understand the thinking of the keyword 'role' here.
> > And I can't understand it in the other model.
> > Can you give me some link about it?
> > 
> > Thank you, very much!
> >  
> > Kermit
> 
> For getting an overview of Model/View programming with Qt, this is a 
> great place to start
>     http://doc.qtsoftware.com/latest/model-view-programming.html
> 
> Here is a description of the role concept:
>     http://doc.qtsoftware.com/latest/model-view-model.html#item-roles
> 
> Alessandro

Thank you, Alessandro, so kind of you!