C++ ListModel in QML - Its not connecting

[Sajjad Ali]

Hello, I have a list of colors created in C++ Model. I connected this to QML. But I get lots of errros..

Please help me identify problem here. Thanks :-)

Errors:

Error compiling qml file: D:/WritingModel/WritingModel/main.qml:2:29: error: Invalid import qualifier ID
mingw32-make.exe[2]: *** [CMakeFiles\appWritingModel.dir\build.make:117: .rcc/qmlcache/appWritingModel_main_qml.cpp] Error 1
mingw32-make.exe[1]: *** [CMakeFiles\Makefile2:97: CMakeFiles/appWritingModel.dir/all] Error 2
mingw32-make.exe: *** [Makefile:135: all] Error 2
22:08:33: The process "C:\Qt\Tools\CMake_64\bin\cmake.exe" exited with code 2.
Error while building/deploying project WritingModel (kit: Desktop Qt 6.6.1 MinGW 64-bit)
When executing step "Build"

HeaderFile:

#ifndef LISTMODEL_H
#define LISTMODEL_H

#include <QObject>
#include <QAbstractListModel>
#include <QColor>

class ListModel : public QAbstractListModel
{
    Q_OBJECT
public:
    explicit ListModel(QObject *parent = nullptr);
private:
    QStringList list;
signals:

    // QAbstractItemModel interface
public:
    int rowCount(const QModelIndex &parent) const;
    QVariant data(const QModelIndex &index, int role) const;
    QHash<int, QByteArray> roleNames() const;
};

#endif // LISTMODEL_H

Function Declarations:

#include "ListModel.h"

ListModel::ListModel(QObject *parent)
    : QAbstractListModel(parent)
{
    list = QColor::colorNames();
}

int ListModel::rowCount(const QModelIndex &parent) const
{
    return list.size();
}

QVariant ListModel::data(const QModelIndex &index, int role) const
{
    const int row = index.row();
    const QString result = list [row];
    return result;
}

QHash<int, QByteArray> ListModel::roleNames() const
{
    QHash<int, QByteArray> mapping;
    mapping[Qt::DisplayRole] = "display";
    return mapping;
}

Main

#include <QApplication>
#include <QQmlApplicationEngine>
#include "ListModel.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QQmlApplicationEngine engine;
    ListModel list;
    qmlRegisterSingletonInstance ("Sajjad.Models",1,0,"MyColors",&list);
    const QUrl url(u"qrc:/WritingModel/main.qml"_qs);
    QObject::connect(
        &engine,
        &QQmlApplicationEngine::objectCreated,
        &app,
        [url](QObject *obj, const QUrl &objUrl) {
            if (!obj && url == objUrl)
                QCoreApplication::exit(-1);
        },
        Qt::QueuedConnection);

    engine.load(url);
    return app.exec();
}

Main.qml

import QtQuick
import Sajjad.Models 1.0 as peter

Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")
    ListView {
        width: 300
        height: 300
        anchors.centerIn: parent
        model: peter.MyColors
        delegate: Text {
            text: display
        }
    }
} 

[GrecKo]

@Sajjad-Ali try "as Peter"

I suspect the lowercase p is the issue.

[Sajjad Ali]

Mr @GrecKo thanks its working. 🙂