Passing a list of model from c++ to QML

luca

Hi all,
I have an array of model that I need to pass to QML to show in some listView .
To pass a single model I use:
@
m_declarativeView->rootContext()->setContextProperty("riepilogoSatelliteModel", m_mappaRiepiloghiSatellitiModel[0]);
@

where m_mappaRiepiloghiSatellitiModel is:
@
QMap <int, RoleItemModel*>
@
and this works fine.

Now I need to call something like this:
@
m_declarativeView->rootContext()->setContextProperty("riepilogoSatelliteModelArray", m_mappaRiepiloghiSatellitiModel.values());
@
to pass the whole array but Compilation fail:
@
...
error: no matching function for call to 'QDeclarativeContext::setContextProperty(const QString, QList<RoleItemModel*>)'
...
@

Is it possible to pass it to QML ?

andre

Perhaps "this wiki page":http://developer.qt.nokia.com/wiki/How_to_expose_lists_to_QML is of use to you?

luca

Now I tried with:
@
Q_DECLARE_METATYPE(QList<RoleItemModel*>)
...
...
m_declarativeView->rootContext()->setContextProperty("riepilogoSatelliteModelList", QVariant::fromValue(m_mappaRiepiloghiSatellitiModel.values()));
@

and the compilation end without error.

Now I don't know how to access the models list in QML. I'm trying with:
@
import QtQuick 1.0

Rectangle {

width: 400; height: 600

ListView {
    id: lista_principale
    anchors.fill: parent
    model: riepilogoSatelliteModelList[0]
    orientation: ListView.Horizontal
    delegate: pagine_delegate
    snapMode: ListView.SnapToItem
}

...
...
@

But when running I get:
qrc:riepilogosatellite2.qml:10: ReferenceError: Can't find variable: riepilogoSatelliteModelList

lgeyer

You will have to register both types to QML.
@
qmlRegisterType<QMap<int, RoleItemModel*> >();
qmlRegisterType<RoleItemModel>();
@
However, you might get in trouble with the first one as QMap is not a QObject.

luca

I thinks the problem is;
@
riepilogoSatelliteModelList[0]
@

because I've done some tests and it seems riepilogoSatelliteModelList is correctly exposed to QML but I don't know how to access a singole model in the list and use it in a ListView...

luca

Ok, I solved by creating this class;
@
class MappaModel : public QObject
{
Q_OBJECT
Q_PROPERTY(RoleItemModel* modelAttuale READ modelAttuale WRITE impostaModel)
Q_PROPERTY(int chiaveAttuale READ chiaveAttuale WRITE impostaChiaveAttuale)

public:
explicit MappaModel(QObject parent = 0);
void caricaMappa(QMap< int, RoleItemModel > );

RoleItemModel *modelAttuale();
void impostaModel(RoleItemModel *);

void impostaChiaveAttuale(int indice);
int chiaveAttuale();

private:
QMap< int, RoleItemModel* > m_mappaModel;
int m_chiaveAttuale;

signals:

};
@

@
#include "mappamodel.h"

#include <QDebug>

MappaModel::MappaModel(QObject *parent) :
QObject(parent)
{
m_chiaveAttuale=7;
}

void MappaModel::caricaMappa(QMap<int, RoleItemModel *> mappa_model)
{
m_mappaModel = mappa_model;
}

//RoleItemModel* MappaModel::recuperaModel(int chiave)
RoleItemModel* MappaModel::modelAttuale()
{
qDebug() << m_chiaveAttuale;
qDebug() << m_mappaModel.value(m_chiaveAttuale);
return m_mappaModel.value(m_chiaveAttuale);
}

void MappaModel::impostaModel(RoleItemModel *)
{

}

void MappaModel::impostaChiaveAttuale(int chiave)
{
m_chiaveAttuale = chiave;
}

int MappaModel::chiaveAttuale()
{
return m_chiaveAttuale;
}
@

Then in my mainWindow class:
@
qmlRegisterType<RoleItemModel>();
...
...
...
m_declarativeView->rootContext()->setContextProperty("mappaModel", &m_mappaModel);
@

So my qml file is something like:
@
import QtQuick 1.0

Rectangle {

width: 400; height: 600

ListView {
    id: lista_principale
    anchors.fill: parent
    model: mappaModel.modelAttuale
    orientation: ListView.Horizontal
    delegate: pagine_delegate
    snapMode: ListView.SnapToItem
}

...
...
@