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QProperty: Allow manual scheduling of binding notification 

In some situation we want to notify even if the value didn't change.

Task-number: QTBUG-101771
Pick-to: 6.2 6.3
Change-Id: I7d82a9f6e0f7d5eb48065e3f428b814939181ea8
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
bb10
Ulf Hermann 2022-03-21 10:48:38 +01:00
parent cbf8fc0ac4
commit 908ee8aab1
2 changed files with 17 additions and 0 deletions
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1
src/corelib/kernel/qproperty_p.h
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@ -286,6 +286,7 @@ public:
bool isUpdating() {return updating;}
void setSticky(bool keep = true) {m_sticky = keep;}
bool isSticky() {return m_sticky;}
void scheduleNotify() {pendingNotify = true;}
QPropertyBindingPrivate(QMetaType metaType, const QtPrivate::BindingFunctionVTable *vtable,
const QPropertyBindingSourceLocation &location, bool isQQmlPropertyBinding=false)

16
tests/auto/corelib/kernel/qproperty/tst_qproperty.cpp
View File

@ -118,6 +118,7 @@ private slots:
void selfBindingShouldNotCrash();
void qpropertyAlias();
void scheduleNotify();
};
void tst_QProperty::functorBinding()
@ -2015,6 +2016,21 @@ void tst_QProperty::qpropertyAlias()
QVERIFY(!alias.isValid());
}
void tst_QProperty::scheduleNotify()
{
int notifications = 0;
QProperty<int> p;
QCOMPARE(p.value(), 0);
const auto handler = p.addNotifier([&](){ ++notifications; });
QCOMPARE(notifications, 0);
QPropertyBinding<int> b([]() { return 0; }, QPropertyBindingSourceLocation());
QPropertyBindingPrivate::get(b)->scheduleNotify();
QCOMPARE(notifications, 0);
p.setBinding(b);
QCOMPARE(notifications, 1);
QCOMPARE(p.value(), 0);
}
QTEST_MAIN(tst_QProperty);
#undef QT_SOURCE_LOCATION_NAMESPACE