Exposing list of Qpoint from C++ to Qml

Merinas

Hi,

I'm trying to expose a list of Qpoint from C++ to qml.
I've added this @ Q_PROPERTY(QVariantList tab READ tab)@ and this @
QVariantList TestList::tab() const
{
QVariantList list;
list.append(QPoint(5,12));
list.append(QPoint(6,0));
list.append(QPoint(45,2));
list.append(QPoint(9,17));
list.append(QPoint(3,15));

return list;

}@

And in Qml side I'm trying that : @import QtQuick 1.0

Rectangle {
width: 100
height: 100
color: "red"

TestList{
    id:list
}

Component.onCompleted:{
    console.log("leght:"+list.tab.length);
    for (var i=0; i<list.tab.length; i++)
    {
        console.log("Array item:", list.tab[i]," "+list.tab[i].x)
    }
}

}@

But I can't access my QPoint data this way it said "undefined" for the ".x" part. And I don't know how to do it. Did I miss something ?

Thanks for reading me.

minimoog77

See http://doc.qt.nokia.com/4.7/declarative-tutorials-extending-chapter5-listproperties.html

Merinas

I want a read only property and I'm not sure it's possible with this solution. Can I just don't set any append function?

Diph

A model can be defined by subclassing QAbstractItemModel. This is the best approach if you have a more complex model that cannot be supported by the other approaches. A QAbstractItemModel can also automatically notify a QML view when the model data has changed.

http://developer.qt.nokia.com/doc/qt-4.7/qdeclarativemodels.html#id-3ebf8f48-0c48-46b0-9937-38b514d927c1

srikanth_trulyit

Problem is QML is not understanding how to access QPoint::x() method. It is neither a slot nor declared as Q_INVOKABLE.

In order to do that create a QObject wrapper around QPoint and supply Q_INVOKABLE methods namely x(), y() which inturn returns the underlying QPoint x,y. Expose this as a QObjectList to qml. Things should work.

Also for your reference see "qml basic type point":http://doc.qt.nokia.com/latest/qml-point.html and
Qt.point() so that you can rethink your implementation.

Merinas

That's seems to be a good solution, I will look in this way.
I've read this reference, but I don't see how thats could help me.