QFileSystemModel: setting folder icons without using QFileIconProvider

[Bubbas]

Hi all,

I'm currently trying to change the folder icons from my FileSystemModelClass (subclass of QFileSystemModel).
I've tried subclassing the QFileIconProvider but It gave bad performance. Therefore I decided to use the data() method in my FileSystemModelClass instead.

The problem i face is the following:

Depending on the contents in a folder, a certain icon for the folder shall be set.

So, (in theroy), in the data() method I check the user role, and if it is Qt::DecorationRole I return the proper QIcon. Basically, If a folder contains a file with an extension *.foo that folder shall use an icon named "folderFoo" and the data() function shall return the corresponding QIcon.

So, given a QModelIndex I check if that index is a folder and if so contains a *.foo file and if so, return the "folderFoo" icon.

But...is does not work. It sets the icons for any folder in the actual folder I want to set the icon for.

Has anyone done anything like this, and how did you do it?

Best Regards,
Bubbas