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QObject: do allow setProperty() to change the type of the property

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[ChangeLog][QtCore][QObject] Fixed a bug in setProperty() that caused a
property change not to take effect if the old value compared equal using
QVariant's equality operator, but the values were not strictly equal.

Task-number: QTBUG-69744
Change-Id: I00e04a465fcf4fc1a462fffd1547885861a07a64
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
This commit is contained in:
Thiago Macieira 2018-08-03 17:55:11 -07:00
parent 4c22350278
commit 64a560d977
2 changed files with 15 additions and 2 deletions
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3
src/corelib/kernel/qobject.cpp
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@ -3898,7 +3898,8 @@ bool QObject::setProperty(const char *name, const QVariant &value)
d->extraData->propertyNames.append(name);
d->extraData->propertyValues.append(value);
} else {
if (value == d->extraData->propertyValues.at(idx))
if (value.userType() == d->extraData->propertyValues.at(idx).userType()
&& value == d->extraData->propertyValues.at(idx))
return false;
d->extraData->propertyValues[idx] = value;
}

14
tests/auto/corelib/kernel/qobject/tst_qobject.cpp
View File

@ -2976,6 +2976,7 @@ void tst_QObject::dynamicProperties()
QVERIFY(obj.dynamicPropertyNames().isEmpty());
// set a non-dynamic property
QVERIFY(obj.setProperty("number", 42));
QVERIFY(obj.changedDynamicProperties.isEmpty());
QCOMPARE(obj.property("number").toInt(), 42);
@ -2983,19 +2984,30 @@ void tst_QObject::dynamicProperties()
QVERIFY(!obj.setProperty("number", "invalid string"));
QVERIFY(obj.changedDynamicProperties.isEmpty());
// set a dynamic property
QVERIFY(!obj.setProperty("myuserproperty", "Hello"));
QCOMPARE(obj.changedDynamicProperties.count(), 1);
QCOMPARE(obj.changedDynamicProperties.first(), QByteArray("myuserproperty"));
//check if there is no redundant DynamicPropertyChange events
QVERIFY(!obj.setProperty("myuserproperty", "Hello"));
QCOMPARE(obj.changedDynamicProperties.count(), 1);
obj.changedDynamicProperties.clear();
QCOMPARE(obj.property("myuserproperty").type(), QVariant::String);
QCOMPARE(obj.property("myuserproperty").toString(), QString("Hello"));
QCOMPARE(obj.dynamicPropertyNames().count(), 1);
QCOMPARE(obj.dynamicPropertyNames().first(), QByteArray("myuserproperty"));
// change type of the dynamic property
obj.changedDynamicProperties.clear();
QVERIFY(!obj.setProperty("myuserproperty", QByteArray("Hello")));
QCOMPARE(obj.changedDynamicProperties.count(), 1);
QCOMPARE(obj.changedDynamicProperties.first(), QByteArray("myuserproperty"));
QCOMPARE(obj.property("myuserproperty").type(), QVariant::ByteArray);
QCOMPARE(obj.property("myuserproperty").toString(), QByteArray("Hello"));
// unset the property
obj.changedDynamicProperties.clear();
QVERIFY(!obj.setProperty("myuserproperty", QVariant()));
QCOMPARE(obj.changedDynamicProperties.count(), 1);