How to Create a Model Like QFilesystemModel

[elveatles]

I would like to create a model like QFilesystemModel. I am fetching information from a database about directories which I would like to display in a QTreeView. I'm able to do this with QAbstractItemModel, but I can't figure out how to implement the lazy loading aspect of QFilesystemModel. I assume QFileSystemModel is only loading children for parents that are expanded. There are way too many subdirectories within subdirectories to load it all up front. I'd appreciate any help with this.

[elveatles]

I realized QAbstractItemModel only calls methods like rowCount in an on-demand way. So I can load the children there. How QFileSystemModel does this in a threaded way is still a bit of a mystery to me though.

[SGaist]

Hi,

The best way to find out is to take a look at the sources of QFileSystemModel :)

[elveatles]

Thank you. That helps.