QFileSystemModel: setting folder icons without using QFileIconProvider

  • 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,

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