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

[Alessandro Portale]

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