How to store custom data inside each index in QFileSystemModel

[Scope]

Hi,

I have QFileSystemModel and I want to store some additional data in each index.
I used setData function like as

model.setData(index, "additional data", Qt::UserRole);

model.setData(index, "additional data", Qt::UserRole);

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but when I try take these custom data by means of command

qDebug()<< model.index(0, 0, parent).data(Qt::UserRole);

qDebug()<< model.index(0, 0, parent).data(Qt::UserRole);

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it return invalid QVariant, why? QFileSystemModel does not contain container for custom data? If not then I have to inherit from file system model and store it myself?

For example inside my custom delegate if index represents file I need take size of that file. If index represents folder I want take count of files inside this folder and some more information. How I can this done?

Regards,

[anda_skoa]

it return invalid QVariant, why? QFileSystemModel does not contain container for custom data?

I doubt that the model can store data, its purpose is to present the file system data in the Qt model interface.

If not then I have to inherit from file system model and store it myself?

That sounds like a valid approach.
Alternatively you could use a QIdentityProxyModel based proxy

Cheers,
_