CODEWITHSUNDEEP
qtconstructorprivate
Trainee
Trainee

Reputation: 61

Constructor is private?

C:/Qt/.../mymodel.h:-1: In member function 'void MainWindow::createModel()':

error: 'myModel::myModel(QObject*)' is private

error: within this context

mymodel.h:

#ifndef MYMODEL_H
#define MYMODEL_H

#include <QStandardItemModel>

class myModel : public QStandardItemModel
{
public:
    Q_OBJECT

    myModel(QObject *parent = 0);
};

#endif // MYMODEL_H

mymodel.cpp:

#include "mymodel.h"

myModel::myModel(QObject *parent) :
    QStandardItemModel(parent)
{

}

mainwindow.h

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow();

private slots:
    ...

signals:
    ...

private:
    ...
    myModel *model;
};

mainwindow.cpp:

void MainWindow::createModel()
{
    model = new myModel(this);

Thanks.

Upvotes: 4

Views: 2004

Answers (1)

ccoakley
ccoakley

Reputation: 3255

I'm going to preface this with saying that I just browsed SO for other Qt questions and then stumbled around the documentation site below to arrive at this guess.

From http://doc.qt.digia.com/4.5/qobject.html#Q_OBJECT

The Q_OBJECT macro must appear in the private section of a class definition that declares its own signals and slots or that uses other services provided by Qt's meta-object system.

I'm guessing that you should move it before your public: in mymodel.h

This was the SO post I used to find this:

What does the Q_OBJECT macro do? Why do all Qt objects need this macro?

Upvotes: 4

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