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An extended version of QFileSystemModel with access to parent directory
License: MIT License
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you create full tree at start and that's so slowly when you have a big folder tree. maybe you create dynamic load data when user expand folder?
for example - create closed folders and just 2 levels deep for all. when user expand folder - read one more level deep only for this item.
second option it's a caching. you don't need to read data again if it's loaded...
i modify code to use in Python and its worked. I like to use it but its so slowly ((