Displaying Menu Bar

[giriuvce]

Hi, I m using QtSDK 4.7 in my windows vista..
I thought the following code is enough to show a menu bar..

QAction *exitAct = new QAction(tr("E&xit"), this);
connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));
QMenu *filemenu = new QMenu("&File", this);
menuBar()->addMenu(filemenu);
filemenu->addAction(exitAct);

QAction *exitAct = new QAction(tr("E&xit"), this);
connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));
QMenu *filemenu = new QMenu("&File", this);
menuBar()->addMenu(filemenu);
filemenu->addAction(exitAct);

To copy to clipboard, switch view to plain text mode 

This is included in the MainWindow constructor.
But the menu bar is not being displayed. What else can i do?
I ve developed a small Qt project and i want it to b given gui using QMainWindow tools.
Plz Help me.

[wysota]

Please provide a minimal compilable example reproducing the problem.

[giriuvce]

Thank u for reply sir. Here is the complete code which i think should show a menubar and a file menu. Plz verify it.

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <QMainWindow>
 
class MainWindow : public QMainWindow
{
    Q_OBJECT
 
public:
    MainWindow(QWidget *parent = 0);
};
 
#endif // MAINWINDOW_H

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = 0);
};

#endif // MAINWINDOW_H

To copy to clipboard, switch view to plain text mode 

main.cpp

#include <QtGui/QApplication>
#include "mainwindow.h"
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}

#include <QtGui/QApplication>
#include "mainwindow.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}

To copy to clipboard, switch view to plain text mode 

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QMenu>
#include <QMenuBar>
 
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent)
{
    QAction *exitAct = new QAction(tr("E&xit"), this);
    connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));
    QMenu *filemenu = new QMenu("&File", this);
    menuBar()->addMenu(filemenu);
    filemenu->addAction(exitAct);
}

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QMenu>
#include <QMenuBar>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent)
{
    QAction *exitAct = new QAction(tr("E&xit"), this);
    connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));
    QMenu *filemenu = new QMenu("&File", this);
    menuBar()->addMenu(filemenu);
    filemenu->addAction(exitAct);
}

To copy to clipboard, switch view to plain text mode 

I want a simple code that should show menubar and menu items so that i can put actions for them. Thank u.

[wysota]

Does this minimal example work?

#include <QtGui>
 
int main(int argc, char **argv){
  QApplication app(argc, argv);
  QMainWindow mw;
  QAction *exitAct = new QAction("Exit", &mw);
  QMenu *filemenu = new QMenu("File", &mw);
  mw.menuBar()->addMenu(filemenu);
  filemenu->addAction(exitAct);
  mw.show();
  return app.exec();
}

#include <QtGui>

int main(int argc, char **argv){
  QApplication app(argc, argv);
  QMainWindow mw;
  QAction *exitAct = new QAction("Exit", &mw);
  QMenu *filemenu = new QMenu("File", &mw);
  mw.menuBar()->addMenu(filemenu);
  filemenu->addAction(exitAct);
  mw.show();
  return app.exec();
}

To copy to clipboard, switch view to plain text mode 

If not, do other Qt applications (like some demos) show menus?