QFileSystemModel and QSortFilterProxyModel - root index is not preserved
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In the way such behavior breaks SOLID substitute rule - I can't use descendant class QFileSystemModel like it was its base class QAbstractItemModel in QSortFilterProxyModel. While not a 100% bug it's definitely a serious design flaw, and worth to be reported. But where?
@MasterBLB said in QFileSystemModel and QSortFilterProxyModel - root index is not preserved:
But where?
In Qt bug tracker https://bugreports.qt.io/secure/Dashboard.jspa
Also you can talk to Qt developers on their mailing list. -
In the way such behavior breaks SOLID substitute rule - I can't use descendant class QFileSystemModel like it was its base class QAbstractItemModel in QSortFilterProxyModel. While not a 100% bug it's definitely a serious design flaw, and worth to be reported. But where?
wrote on 3 Jul 2019, 08:44 last edited by VRonin 7 Mar 2019, 10:08breaks SOLID
It doesn't. In fact, if it worked as you expected it would break SOLID
it's definitely a serious design flaw
Sorry to be brutal: No, it's not a flaw, you just didn't understand the design of model/views.
To help you get a better idea of what is going on, try use the same model with 2 different treeviews. In only one of the view callsetRootIndex, and then trigger the filtering. -
wrote on 12 Feb 2025, 22:50 last edited by
Im actually encountering the very same issue.
Clearly it wont be fixed by Qt since Ive even seen posts about this issue back from 2011.
Could someone help me a little bit by telling me what to do please ?@VRonin You were the most precise, suggesting to implements the setRootIndex to the proxymodel, but I would still require a bit more info if I am to do it on my own please :D
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wrote on 13 Feb 2025, 02:51 last edited by
It looks like @VRonin implemented his idea. See https://github.com/VSRonin/QtModelUtilities/blob/master/READMERootIndexProxyModel.md
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It looks like @VRonin implemented his idea. See https://github.com/VSRonin/QtModelUtilities/blob/master/READMERootIndexProxyModel.md