QML Repeater with Qt Graphs Invalid Y Values

daviddev

I'm trying to have a TableModel work in Qt Graphs work with a QML Repeater. The graph works correctly when I comment out the Repeater and uncomment the included non-repeater version in QML. However when the Repeater is present, the model throws the error

initializeXYFromModel Invalid Y coordinate index in model mapper.
file:<filepath-to-qml/RepeaterPlot.qml:49:17: Unable to assign QString to qlonglong

an equal amount of times to the number specified in the model property.

All of this makes me think this is a QML problem rather than a model/C++ problem. I have hard coded all of the source file values for forum purposes. I'm using Qt 6.9.3 on windows 10.

Would anyone have a hunch why the Y value column is not working no matter what I do and/or have suggestions for fixing it?

//QML
import QtQuick
import QtGraphs
import MyImport
GraphsView {
    id: graphsViewRoot
    anchors.fill: parent
    axisX: ValueAxis {
        id: xAxis
        min: -10
        max: 260
    }
    axisY: ValueAxis {
        id: yAxis
        min: -60
        max: 60
    }
    Repeater {
        model: 2
        parent: graphsViewRoot
        delegate: Item {
            // Define the LineSeries instance
            LineSeries {
                id: lineSeries1
                name: "Data Series " //+ (model.index + 1)
            }
            // Define the XYModelMapper instance
            XYModelMapper {
                model: MyRepeaterModel
                series: lineSeries1
                xSection: 0
                ySection: model.index + 1
            }
        }
    }
/* ///////////////////////////////////////////////////////////////////
////////////////THIS WORKS BY ITSELF/////////////////
////////////////////////////////////////////////////////////////////////////////////////
     XYModelMapper {
         model: MyRepeaterModel
         series: lineSeries1     
         xSection: 0
         ySection: 1
     }

    LineSeries {
        id: lineSeries1
        name: "Data Series 1"
    }
*/
}

////mainwindow and QML exposure
    myRepeaterModel = new RepeaterModel();
    qmlRegisterSingletonInstance("MyImport", 1, 0, "MyRepeaterModel",myRepeaterModel);


//Source
#include "RepeaterModel.hpp"
#include <iostream>

RepeaterModel::RepeaterModel(QObject *parent)
    : QAbstractTableModel(parent){
    mySpecStruct = {};
}

int RepeaterModel::rowCount(const QModelIndex &parent) const{
    if (parent.isValid())
        return 0;
    return 64;
}
int RepeaterModel::columnCount(const QModelIndex &parent) const{
    if (parent.isValid())
        return 0;
    return 3;
}
QHash<int, QByteArray> RepeaterModel::roleNames() const{
    QHash<int, QByteArray> roles;
    roles[XRole] = "xPos";
    roles[YRole] = "yPos";
    return roles;
}

QVariant RepeaterModel::data(const QModelIndex &index, int role) const{
    if (!index.isValid())
        return QVariant();
    int row = index.row();
    int col = index.column();
    if (role == Qt::DisplayRole) {
        if (col == 0) {
            return row;
        } else if (col == 1) {
            return 2;
        } else if (col == 2) {
            return 3;
        }
    }
    return QVariant();
}

////header
#ifndef RepeaterModel_HPP
#define RepeaterModel_HPP

#include <QAbstractTableModel>
class RepeaterModel : public QAbstractTableModel
{
    Q_OBJECT
    enum MyRoles {
        XRole = Qt::UserRole + 1,
        YRole
    };
public:
    explicit RepeaterModel(QObject *parent = nullptr);

    // Basic functionality:
    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
    int columnCount(const QModelIndex &parent = QModelIndex()) const override;
    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
    QHash<int, QByteArray> roleNames() const override;

    void SetSpectrumData(ftStruct& specStruct);
    ftStruct getSpectrumData() const;

signals:
    void spectrumChanged();

private:
    ftStruct mySpecStruct;
};

#endif // RepeaterModel_HPP