/*!
    \example demos/qmlcustommodel
    \title QML Custom Model
    \subtitle

    This example shows how to use your own QAbstractItemModel derived data model as a data source for a ChartView.
    \image demos_qmlcustommodel.png

    First we create a ChartView:
    \snippet ../demos/qmlcustommodel/qml/qmlcustommodel/main.qml 1

    Then our data model that contains the shares of top-5 car manufacturers in Finland for the last 5 years. The model
    could be constructed from various sources depending on the use case, but here we use static data for the sake of
    simplicity. Check customtablemodel.cpp, declarativemodel.cpp and plugin.cpp to see how to make your own
    QAbstractItemModel accessible on QML.
    \snippet ../demos/qmlcustommodel/qml/qmlcustommodel/main.qml 2

    Then we create several series as children for the same ChartView. First a pie series that illustrates the shares of
    the car manufacturers in Finland in 2011:
    \snippet ../demos/qmlcustommodel/qml/qmlcustommodel/main.qml 3

    And one line series for each manufacturer presenting the share between 2007-2011, for example this one is for
    Volkswagen. The series is not visible by default; it is made visible when the user clicks on the Volkswagen slice
    on the pie series:
    \snippet ../demos/qmlcustommodel/qml/qmlcustommodel/main.qml 4

    And finally a bar series that shows the share for all the other manufacturers between 2007-2011:
    \snippet ../demos/qmlcustommodel/qml/qmlcustommodel/main.qml 5
*/