Review Request 111004: When switching to "Sort by Type", really do sort by type

[Frank Reininghaus]

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http://git.reviewboard.kde.org/r/111004/
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Review request for Dolphin.


Description
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Emmanuel looked into this issue already in https://git.reviewboard.kde.org/r/109471/, but with this patch, the issue was for some reason not fixed on my system.

But I think I have found the root cause of the bug now. When switching to "Sort by Type", KFileItemModel::onSortRoleChanged() resorts the items, but it doesn't work because the "type" role isn't known yet. It only gets added later to the model when KFileItemListView::slotSortRoleChanged() calls applyRolesToModel(), which calls

KFileItemModel::setRoles(const QSet<QByteArray>& roles)

This function does set the "type" role (via retrieveData() - note that item.isMimeTypeKnown() is true because KFileItemModelRolesUpdater has determined the mime type in the mean time), but it does not trigger a resorting.

Fixed by adding the new role in KFileItemModel::onSortRoleChanged(), *before* the resorting is triggered.


This addresses bugs 310705 and 312014.
    http://bugs.kde.org/show_bug.cgi?id=310705
    http://bugs.kde.org/show_bug.cgi?id=312014


Diffs
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  dolphin/src/tests/kfileitemmodeltest.cpp e636bcd 
  dolphin/src/kitemviews/kfileitemmodel.cpp c78fdc3 

Diff: http://git.reviewboard.kde.org/r/111004/diff/


Testing
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Works for me, old unit tests pass (I had to modify one of them slightly though), added a new test.


Thanks,

Frank Reininghaus

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