How to access (c++) model data from qml

Furby

Hi,

I'm new with qlm and I have a problem to access data from a Subclass in my ListModel (derived from QAbstractListModel ).
I use the ListModel with a ListView and everything is fine. But I also wanna access the Data outside of the ListView. For this reason I use a public slot to get the data from my (c++) ListModel dependent on the current selected item in the ListView. This part also works fine, but from this point I could not access the explicit model (entry) stored in my ListModel

Here some code snippets:
I hope your guys can help me.

main.cpp
@
ListModel *listModel = new ListModel();
listModel->add(new Subclass("Class 1", "Class 1.1", "Class 1.2") );

// qmlRegisterInterface<ListModel>("ListModel");
qmlRegisterInterface<Parent>("Parent");
qmlRegisterInterface<Subclass>("Subclass");

 qRegisterMetaType<Parent>("Parent");
 qRegisterMetaType<Parent>("Subclass");

QtQuick2ApplicationViewer viewer;
viewer.rootContext()->setContextProperty("listModel", listModel);

viewer.setMainQmlFile&#40;QStringLiteral("qml/test/main.qml"&#41;);
viewer.showExpanded();

@

parent.h
@
class Parent : public QObject
{
Q_OBJECT
Q_PROPERTY(QString firstname READ getFirstname WRITE setFirstname NOTIFY firstNameChanged )
Q_PROPERTY(QString lastname READ getLastname WRITE setLastname NOTIFY lastNameChanged)

public:
explicit Parent(){}
explicit Parent(const QString &first, const QString &last,QObject *parent = 0);
Parent( const Parent &p);
Parent& operator=(const Parent & p);

signals:

public slots:
QString getFirstname() const;
QString getLastname() const ;

void setFirstname( const QString &firstname);
void setLastname( const QString &lastname);

private:
QString _firstname;
QString _lastname;

signals:
void firstNameChanged();
void lastNameChanged();

};

Q_DECLARE_METATYPE( Parent )
@

@
class Subclass : public Parent
{
Q_OBJECT

Q_PROPERTY(QString scublassname READ getSubclassName WRITE setSubclassName NOTIFY subclassNameChanged)

public:
Subclass(){}
Subclass( const QString &last, const QString &first, const QString &sub);
Subclass( const Subclass &subclass);
Subclass& operator=(const Subclass & subclass);

public slots:
QString getSubclassName() const ;
void setSubclassName(const QString & name);

private:
QString _className;

signals:
void subclassNameChanged();
};

Q_DECLARE_METATYPE( Subclass )
@

main.qml
@
import QtQuick 2.0

Rectangle {
width: 360
height: 360

Component
{
    id: decorator
    Rectangle{
        height: 100
        width: 360

        color: "yellow"
        opacity: 0.5

        Text {
         text:  '<b>Firstname:</b> ' + model.firstname1 + '<br>' +
                '<b>Lastname:</b> ' + model.lastname1 + '<br>' +
                '<b>SubclassName:</b> ' + model.scublassname1 + '<br>'
        }

        MouseArea {
            anchors.fill: parent;
            onClicked:{
                listview.currentIndex = index;
            }
        }
    }
}

ListView{
    id: listview
   anchors.top: parent.top
   anchors.left: parent.left
   anchors.right: parent.right

    height: 200
    model: listModel
    delegate: decorator
    spacing: 15
    focus: true
    clip: true

}

Rectangle{
    color: "blue"
    anchors.top: listview.bottom
    anchors.left: parent.left
    anchors.right: parent.right
    height: 160

    Text{
        anchors.fill: parent
        text: {
            "index =["+listview.currentIndex+"]  " +  listModel.get(listview.currentIndex).firstname
        }
    }
}

}
@

portoist

How is defined "get" method in your ListModel? You have mentioned that you are using public slot, but slot should return void. If you need to expose non-void method to QML you need to define it like this:
@
...
public:
Q_INVOKABLE Parent* get(const int &index);
...
@

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How to access (c++) model data from qml