In docs http://doc.qt.io/qt-5/qtqml-cppintegration-data.html mentioned:
"Certain C++ sequence types are supported transparently in QML as JavaScript
Array types.
In particular, QML currently supports:
QList<int>
QList<qreal>
QList<bool>
QList<QString> and QStringList
QList<QUrl>
Other sequence types are not supported transparently, and instead an instance of any
other sequence type will be passed between QML and C++ as an opaque
QVariantList."
Looks like that "opaque conversion" doesn't work:
class MyData : public QObject {
Q_OBJECT
Q_PROPERTY(QList<QGeoCoordinate> path READ path WRITE setPath NOTIFY
pathChanged)
public:
QList<QGeoCoordinate> path() {
return _path;
}
...
MyData object filled with some data and exposed as context property to QML. At
QML i imported QtPositioning, so QGeoCoordinate refers to coordinate QML basic
type, but
console.log(myData.path) prints QVariant(QList<QGeoCoordinate>)
console.log(myData.path) prints undefined
- there is no sequence, no length.
Is it possible to expose QList<Type> sequence to QML, where Type known by meta
object system and refers to QML basic type provided by an QtQuick module?
I know that i can expose C++ property of type QVariantList , but what is that
opaque conversion mentioned in docs.
Maxim
Максим Бесчеревных.
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