本文整理汇总了C++中QDeclarativePropertyMap::clear方法的典型用法代码示例。如果您正苦于以下问题：C++ QDeclarativePropertyMap::clear方法的具体用法？C++ QDeclarativePropertyMap::clear怎么用？C++ QDeclarativePropertyMap::clear使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类QDeclarativePropertyMap的用法示例。
在下文中一共展示了QDeclarativePropertyMap::clear方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: changed
void tst_QDeclarativePropertyMap::changed()
{
QDeclarativePropertyMap map;
QSignalSpy spy(&map, SIGNAL(valueChanged(const QString&, const QVariant&)));
map.insert(QLatin1String("key1"),100);
map.insert(QLatin1String("key2"),200);
QCOMPARE(spy.count(), 0);
map.clear(QLatin1String("key1"));
QCOMPARE(spy.count(), 0);
//make changes in QML
QDeclarativeEngine engine;
QDeclarativeContext *ctxt = engine.rootContext();
ctxt->setContextProperty(QLatin1String("testdata"), &map);
QDeclarativeComponent component(&engine);
component.setData("import QtQuick 1.0\nText { text: { testdata.key1 = 'Hello World'; 'X' } }",
QUrl::fromLocalFile(""));
QVERIFY(component.isReady());
QDeclarativeText *txt = qobject_cast<QDeclarativeText*>(component.create());
QVERIFY(txt);
QCOMPARE(txt->text(), QString('X'));
QCOMPARE(spy.count(), 1);
QList<QVariant> arguments = spy.takeFirst();
QCOMPARE(arguments.count(), 2);
QCOMPARE(arguments.at(0).toString(),QLatin1String("key1"));
QCOMPARE(arguments.at(1).value<QVariant>(),QVariant("Hello World"));
QCOMPARE(map.value(QLatin1String("key1")), QVariant("Hello World"));
}示例2: clear
void tst_QDeclarativePropertyMap::clear()
{
QDeclarativePropertyMap map;
map.insert(QLatin1String("key1"),100);
QVERIFY(map.keys().count() == 1);
QCOMPARE(map.value(QLatin1String("key1")), QVariant(100));
map.clear(QLatin1String("key1"));
QVERIFY(map.keys().count() == 1);
QVERIFY(map.contains(QLatin1String("key1")));
QCOMPARE(map.value(QLatin1String("key1")), QVariant());
}示例3: count
void tst_QDeclarativePropertyMap::count()
{
QDeclarativePropertyMap map;
QCOMPARE(map.isEmpty(), true);
map.insert(QLatin1String("key1"),100);
map.insert(QLatin1String("key2"),200);
QCOMPARE(map.count(), 2);
QCOMPARE(map.isEmpty(), false);
map.insert(QLatin1String("key3"),"Hello World");
QCOMPARE(map.count(), 3);
//clearing doesn't remove the key
map.clear(QLatin1String("key3"));
QCOMPARE(map.count(), 3);
QCOMPARE(map.size(), map.count());
}