statemachine: Purge restorable properties when they are restored

Previously, a registered restorable property would only be
unregistered if the property was animated (see
QStateMachinePrivate::_q_animationFinished()).
But if a property is set directly, it should also be unregistered;
otherwise, the state machine would use the previously saved (stale)
value the next time that property should be restored.

Change-Id: I5d246aa5355ddd0ba5f81b0186a9f0e4f3bbaa3f
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@nokia.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/corelib/statemachine/qstatemachine.cpp b/src/corelib/statemachine/qstatemachine.cpp
index ec93bb1b2d..2453ae970d 100644
--- a/src/corelib/statemachine/qstatemachine.cpp
+++ b/src/corelib/statemachine/qstatemachine.cpp
@@ -841,6 +841,8 @@ void QStateMachinePrivate::applyProperties(const QList<QAbstractTransition*> &tr
             for (int i = 0; i < assignments.size(); ++i) {
                 const QPropertyAssignment &assn = assignments.at(i);
                 assn.write();
+                if (!assn.explicitlySet)
+                    unregisterRestorable(assn.object, assn.propertyName);
             }
         }
     }