In the code below I create Qt Widget's Application, base class QMainWindow, and without .ui form. Cant understand why MenuBar doesn't show, tried different variants and no one works.
This image demonstrate what i got
.
System Ubuntu 16.04. Using QMake version 3.0 and Qt version 5.5.1
Note: on other machines the same code works correctly.
Below mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QtGui>
#include <QWidget>
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow(QWidget *parent = 0);
~MainWindow();
private:
QMenu *file;
};
#endif // MAINWINDOW_H
Below mainwindow.cpp, commented lines show how I tried to fix it.
#include "mainwindow.h"
#include <QtGui>
#include <QtWidgets>
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
//QVBoxLayout *vbl = new QVBoxLayout;
QMenu *file = new QMenu("&File"); //menuBar()->addMenu("&File");//new QMenu("&File");
file->addAction("&Quit",qApp,SLOT(quit()),Qt::CTRL+Qt::Key_Q);
QMenuBar *mb = menuBar();
mb->addMenu(file);
mb->show();
setMenuBar(mb);
//vbl->setMenuBar(mb);
//setLayout(vbl);
resize(400,400);
}
MainWindow::~MainWindow()
{
}
