https://bugs.kde.org/show_bug.cgi?id=345601

--- Comment #4 from Dmitry Kazakov <dimul...@gmail.com> ---
Git commit 8fd316da11d6ec5c8a129bc88dd042fb0bcdc659 by Dmitry Kazakov.
Committed on 19/08/2020 at 22:08.
Pushed by dkazakov into branch 'krita/4.3'.

Fix temporary wrongly selected layer when merging down huge layers

The problem happened because of our workaround for Qt's removed
item avoidance algorithm. On element removal, Qt selects an item above
that, but we need a reverse, below it.

The previous implementation just tried to fix Qt's behavior after the
removal, but that didn't seem to work correctly in case of merge down.
Therefore, this patch implements a special signal that is fired *before*
beginRemoveRows(), that fixes the selection before Qt can lay its hands
on it.
Related: bug 418922

M  +15   -0    libs/ui/kis_node_filter_proxy_model.cpp
M  +4    -0    libs/ui/kis_node_filter_proxy_model.h
M  +1    -0    libs/ui/kis_node_model.cpp
M  +1    -0    libs/ui/kis_node_model.h
M  +9    -9    plugins/dockers/layerdocker/LayerBox.cpp
M  +1    -1    plugins/dockers/layerdocker/LayerBox.h

https://invent.kde.org/graphics/krita/commit/8fd316da11d6ec5c8a129bc88dd042fb0bcdc659

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