How to pass an array (list) filled with custom data to QML?

[Anton1978]

Good afternoon.
I want to pass a QML list filled with custom class. It seems that this is not so difficult if you make a list of pointers to objects.
They even receive this list in QML, but they cannot understand it.
Custom class

#include <QObject>
#include <qqml.h>

class MinePlace : public QObject
{
    Q_OBJECT
    QML_ELEMENT

public:
    explicit MinePlace();
    int mark = 0;
    int bomb = 0;
    int x = 0;
    int y = 0;
};

add to list

void GameCalculate::restartGame()
{
    _forSend.clear();
    int label = 0;
    for(int y = 0;y < _y; ++y)
    {
        for(int x = 0;x < _x; ++x)
        {
            MinePlace *n = new MinePlace();
            n->mark = label;
            n->bomb = QRandomGenerator64::global()->bounded(0,2);
            n->x = x;
            n->y = y;
            _forSend.append(n);
            ++label;
        }
    }

    for(auto &a: _forSend)
    {
        qDebug() << a->mark;
    }
}

and send

Q_INVOKABLE QList<MinePlace*> getModel(){return _forSend;}

in QML

property var gameModel: null
//some code
    Component.onCompleted: {
        gameModel = gamecalcID.getModel();
        console.info(gamecalcID.getModel())
    }

as a result I see the output of the resulting list

qml: [MinePlace(0x1da60e95530),MinePlace(0x1da60e95560),MinePlace(0x1da60e94f60),MinePlace(0x1da60e955f0),MinePlace(0x1da60e95050),MinePlace(0x1da60e95620),MinePlace(0x1da60e95080),MinePlace(0x1da60e950b0),MinePlace(0x1da60e951d0),MinePlace(0x1da60e95650),MinePlace(0x1da60e95140),MinePlace(0x1da60e95170),MinePlace(0x1da60e95200),MinePlace(0x1da60e95590),MinePlace(0x1da60e95230),MinePlace(0x1da60e95260),MinePlace(0x1da60e95290)

It’s clear that these are numbers of memory cells (which is expected, I work with pointers), but how can I get a normal data array from them in QML? And even in an understandable format?

In theory, of course, I can make it simpler - make several properties and store several arrays in them and compare the corresponding values, but this solution seems strange and incorrect to me.

[Pl45m4]

@Charby said in How to pass an array (list) filled with custom data to QML?:

console.info(gameModel[0].mark) // should be 0
console.info(gameModel[0].mark) // should be 1

console.info(gameModel[1].mark) // should be 1

:)

@Anton1978

As @Charby wrote above, you can access the list data using the index and the member you want to address, like this:
(with the changes shown below)

// return a list reference
// consider to make it const if you dont plan to modify the list later (only in C++ code)
Q_INVOKABLE const QList<MinePlace *> &getModel() { return _forSend;}

In QML something like

property var gameModel = gamecalcID.getModel();
for (var mp in gameModel)
        console.log(mp.mark)

[Charby]

Out of curiosity, what is the ouput of console.info(gameModel[0].label) ?

[Anton1978]

@Charby MinePlace(0x1da60e95530)

[Charby]

@Anton1978 sorry my mistake, I meant :

 console.info(gameModel[0].mark) // should be 0
console.info(gameModel[0].mark) // should be 1

[Charby]

it seems to me that you successfully passed an array (list) filled with custom data to QML...or do you need something else ?

[Pl45m4]

@Charby said in How to pass an array (list) filled with custom data to QML?:

console.info(gameModel[0].mark) // should be 0
console.info(gameModel[0].mark) // should be 1

console.info(gameModel[1].mark) // should be 1

:)

@Anton1978

As @Charby wrote above, you can access the list data using the index and the member you want to address, like this:
(with the changes shown below)

// return a list reference
// consider to make it const if you dont plan to modify the list later (only in C++ code)
Q_INVOKABLE const QList<MinePlace *> &getModel() { return _forSend;}

In QML something like

property var gameModel = gamecalcID.getModel();
for (var mp in gameModel)
        console.log(mp.mark)