ComponentModel: Fix segfaults on reset when used with a proxy model

Resetting the model is split into two parts - 'ComponentModel
::setRootComponents' updates the root item list and emits
'QAbstractItemModel::modelReset' which was connected to a private
slot of the class that updates the component check state and then
emits 'QAbstractItemModel::dataChanged' for each component index.

The issue was that these could be emitted before the proxy model's
private slot that catches the source model reset and performs
invalidation had been invoked, causing the proxy model's slot
reacting to source model data changes to refer previously retrieved
source model indexes, which now had invalid information.

Fix by moving the post-reset operations to non-slot function
'ComponentModel::postModelReset()' which is called after the
'QAbstractItemModel::modelReset' is emitted, so that any directly
connected slots get invoked first.

Task-number: QTIFW-1404
Change-Id: If4d55110c93658689787484d0e8a8eb6b6da685d
Reviewed-by: Katja Marttila <katja.marttila@qt.io>

0 files changed, 0 insertions, 0 deletions