Errors while loading Qt include files

Pierre Castor

Hi,
i have a problem in a project where i want to mix Qt/C++ and QML. I don't know why but Qt Creator tell me that there is 39 problems in different Qt include files (sorry i didn't find how to put it in English) :
Errors

So, as you can see, errors got an encoding problem and it seems unlogic. It happens since i try to adaptate my Line class to pass it by context property to my Qml.

This is my .pro file :

QT += quick quickcontrols2 core

CONFIG += c++11

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
        entite.cpp \
        ligne.cpp \
        main.cpp

RESOURCES += qml.qrc \
            icons/index.theme \
            icons/20x20/back.png \
            icons/20x20/drawer.png \
            icons/20x20/menu.png \
            icons/20x20@2/back.png \
            icons/20x20@2/drawer.png \
            icons/20x20@2/menu.png \
            icons/20x20@3/back.png \
            icons/20x20@3/drawer.png \
            icons/20x20@3/menu.png \
            icons/20x20@4/back.png \
            icons/20x20@4/drawer.png \
            icons/20x20@4/menu.png \

# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH =

# Additional import path used to resolve QML modules just for Qt Quick Designer
QML_DESIGNER_IMPORT_PATH =

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

HEADERS += \
    entite.h \
    ligne.h

The Line class (.h) :

#ifndef LIGNE_H
#define LIGNE_H

#include <QObject>
#include <QVector>
#include <QVariant>
#include <time.h>
#include "entite.h"


class Ligne : public QObject
{
    Q_OBJECT

    Q_PROPERTY(QString name READ getName CONSTANT)
    Q_PROPERTY(QVector<QVariant> inTab READ getIn CONSTANT)
    Q_PROPERTY(QVector<QVariant> outTab READ getOut CONSTANT)


private:
    QVector<QVariant> inTab;
    QVector<QVariant> outTab;
    QString name;

public:
    Ligne(QString,int,int);
    Ligne(const Ligne&);
    inline QList<QVariant> getIn() { return QVariantList::fromVector(inTab);}
    inline QList<QVariant> getOut() {return QVariantList::fromVector(outTab);}
    inline QString getName() { return name;}

    inline QVariant getIn(int index) { return inTab.at(index);}
    inline QVariant getOut(int index) { return outTab.at(index);}
    inline void addIn(QString name, int value) {inTab.push_back(QVariant::fromValue(entite(name,value)));}
    inline void addOut(QString name, int value) {outTab.push_back(QVariant::fromValue(entite(name,value)));}



};

Q_DECLARE_METATYPE(Ligne)


#endif // LIGNE_H

The Line class (.cpp) :

#include "ligne.h"


Ligne::Ligne(QString _name, int nbIn, int nbOut)
{
    name = _name;
    srand( (unsigned)time(NULL) );

    for(int i=0; i<nbIn;i++)
        addIn(QString("Entree "+QString::number(i+1)),int(rand() % 2));


    for(int i=0; i<nbOut;i++)
        addOut(QString("Sortie "+QString::number(i+1)),int(rand() % 2));

}

Ligne::Ligne(const Ligne& _ligne)
{
    name = _ligne.name;
    inTab = _ligne.inTab;
    outTab = _ligne.outTab;
}

And in conclusion my main.cpp :

#include <QGuiApplication>
#include <QtQml>
#include <QSettings>
#include <QQmlContext>
#include <QQuickStyle>
#include <QIcon>
#include "ligne.h"

int main(int argc, char *argv[])
{
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
#endif


    QGuiApplication app(argc, argv);

    QIcon::setThemeName("gallery");


    QSettings settings;
    if (qEnvironmentVariableIsEmpty("QT_QUICK_CONTROLS_STYLE"))
        QQuickStyle::setStyle(settings.value("style").toString());


    const QString styleInSettings = settings.value("style").toString();
    if (styleInSettings.isEmpty())
        settings.setValue(QLatin1String("style"), QQuickStyle::name());

    QQmlApplicationEngine engine;
    const QUrl url(QStringLiteral("qrc:/Main.qml"));

    QStringList builtInStyles = { QLatin1String("Basic"), QLatin1String("Fusion"),
        QLatin1String("Imagine"), QLatin1String("Material"), QLatin1String("Universal") };
#if defined(Q_OS_MACOS)
    builtInStyles << QLatin1String("macOS");
#elif defined(Q_OS_WINDOWS)
    builtInStyles << QLatin1String("Windows");
#endif

    QVariantList datalist = {
        QVariant::fromValue(Ligne(QString("Test 1"),10,10)),
        QVariant::fromValue(Ligne(QString("Test 2"),10,10)),
        QVariant::fromValue(Ligne(QString("Test 3"),10,10)),
        QVariant::fromValue(Ligne(QString("Test 4"),10,10))
    };

    engine.setInitialProperties({{ "builtInStyles", builtInStyles }});


     engine.rootContext()->setContextProperty("dataModel", datalist);


    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();
}

Someone got an idea of my problem please ? :)

Pierre Castor

You are right, it seems the problem come from my copy constructor which i can't do because of the inheritance of QObject. So i replaced it by QGadget and it works well (I also created a new project to begin on clean base). Thanks a lot !

SGaist

Hi and welcome to devnet,

Your RESOURCES variable content looks wrong.

It should be a list of .qrc files unless I missed something in the latest versions.

You also have one backslash at the end of the last entry and you should not.

Pierre Castor

Hi, thanks for your answer, i removed the backslash but it changed nothing. :'(

Regarding my resources, i have one qrc file which list each of my qml file :

QRC file

isn't it correct ?

KroMignon

@Pierre-Castor said in Errors while loading Qt include files:

Someone got an idea of my problem please ? :)

I think the problem is that you Ligne class do not have any default/copy constructor and so cannot be used in a list.

EDIT: cf https://doc.qt.io/qt-5/qlist.html#details

Pierre Castor

You are right, it seems the problem come from my copy constructor which i can't do because of the inheritance of QObject. So i replaced it by QGadget and it works well (I also created a new project to begin on clean base). Thanks a lot !