how to add data dynamicaly to a qabstracttablemodel and use it on qml tableview

[haseeb india]

how to add data dynamicaly to a qabstractmodel and use it on qml tableview
qml_code
ApplicationWindow {
visible: true
width: 660
height: 620
Data_Class{
id:data}
title: qsTr("TableModel sample")
ColumnLayout{

TextField{
    width:100
    height:50
    id:"text1"
}
TextField{
    width:100
    height:50
 id:"text2"
}
Button{
    width:50
     height:50
 id:"addbutton"
text:"ADD"
onClicked:
{
    data.addEntry(text1.text,text2.text)
}
}

TableView {

    model: tableModel
    TableViewColumn {
        role: "currency"
        title: "Currency"
        width: 180
    }
    TableViewColumn {
        role: "symbol"
        title: "Symbol"
        width: 180
    }

}

}}
main_cpp
int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);
qmlRegisterType<data_class>("org.sdc.data_class", 1,0, "Data_Class");
QQmlApplicationEngine engine;
TableModel *tableModel=new TableModel;
engine.rootContext()->setContextProperty("tableModel", tableModel);
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
return app.exec();
}