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Thread: Displaying Menu Bar

  1. #1
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    Default Displaying Menu Bar

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

    Qt Code:
    1. QAction *exitAct = new QAction(tr("E&xit"), this);
    2. connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));
    3. QMenu *filemenu = new QMenu("&File", this);
    4. menuBar()->addMenu(filemenu);
    5. 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.

  2. #2
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    Default Re: Displaying Menu Bar

    Please provide a minimal compilable example reproducing the problem.
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.


  3. #3
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    Default Re: Displaying Menu Bar

    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
    Qt Code:
    1. #ifndef MAINWINDOW_H
    2. #define MAINWINDOW_H
    3.  
    4. #include <QMainWindow>
    5.  
    6. class MainWindow : public QMainWindow
    7. {
    8. Q_OBJECT
    9.  
    10. public:
    11. MainWindow(QWidget *parent = 0);
    12. };
    13.  
    14. #endif // MAINWINDOW_H
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    main.cpp
    Qt Code:
    1. #include <QtGui/QApplication>
    2. #include "mainwindow.h"
    3.  
    4. int main(int argc, char *argv[])
    5. {
    6. QApplication a(argc, argv);
    7. MainWindow w;
    8. w.show();
    9. return a.exec();
    10. }
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    mainwindow.cpp
    Qt Code:
    1. #include "mainwindow.h"
    2. #include "ui_mainwindow.h"
    3. #include <QMenu>
    4. #include <QMenuBar>
    5.  
    6. MainWindow::MainWindow(QWidget *parent) :
    7. QMainWindow(parent)
    8. {
    9. QAction *exitAct = new QAction(tr("E&xit"), this);
    10. connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));
    11. QMenu *filemenu = new QMenu("&File", this);
    12. menuBar()->addMenu(filemenu);
    13. filemenu->addAction(exitAct);
    14. }
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    I want a simple code that should show menubar and menu items so that i can put actions for them. Thank u.

  4. #4
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    Default Re: Displaying Menu Bar

    Does this minimal example work?
    Qt Code:
    1. #include <QtGui>
    2.  
    3. int main(int argc, char **argv){
    4. QApplication app(argc, argv);
    5. QAction *exitAct = new QAction("Exit", &mw);
    6. QMenu *filemenu = new QMenu("File", &mw);
    7. mw.menuBar()->addMenu(filemenu);
    8. filemenu->addAction(exitAct);
    9. mw.show();
    10. return app.exec();
    11. }
    To copy to clipboard, switch view to plain text mode 
    If not, do other Qt applications (like some demos) show menus?
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.


  5. #5
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    Default Re: Displaying Menu Bar

    Sir, This code is showing a white window as in the previous one.
    Examples which are given in the simulator about Main Window dont show Menu Bar and Menu Options.
    Except that i am getting other output. So may it b the problem with the simulator?


    Added after 1 5 minutes:


    Thank you very much for giving your time sir. This problem has beeb resolved. When
    the application is run in the simulator the menu options are not displayed in the mobile.
    That i can get in the "Qt Simulator Control" Wizard in the "Application" heading. Our basic code to show menu bar

    is running in simulator and in maemo emulator which i installed in my ubuntu.
    Last edited by giriuvce; 24th May 2011 at 13:27.

  6. #6
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    Default Re: Displaying Menu Bar

    Next time please don't forget to mention that you are running some application under Qt Simulator. That was the key part of your issue. Mobile devices don't show standard menus so the simulator doesn't show them as well.
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.


  7. The following user says thank you to wysota for this useful post:

    giriuvce (25th May 2011)

  8. #7
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    Default Re: Displaying Menu Bar

    Sorry for that sir.. But if mobile devices dont show standard menus, then we cant develop apps using menu for mobiles.
    Actually i wanted to show my Qt application as my Engineering project. I thought of telling that it can be used in mobile devices N900 etc. So then.. for that i should not use Menus. Sir please guide me by providing some material and some web links. Thank you very much for your help.

  9. #8
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    Default Re: Displaying Menu Bar

    Quote Originally Posted by giriuvce View Post
    Sorry for that sir.. But if mobile devices dont show standard menus, then we cant develop apps using menu for mobiles.
    That's not entirely true. But it is true that their menu system shouldn't be as large as for a desktop system for obvious reasons.

    Actually i wanted to show my Qt application as my Engineering project. I thought of telling that it can be used in mobile devices N900 etc. So then.. for that i should not use Menus. Sir please guide me by providing some material and some web links. Thank you very much for your help.
    http://doc.trolltech.com/qt-maemo-4.7/maemo5-menu.html
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.


  10. The following user says thank you to wysota for this useful post:

    giriuvce (25th May 2011)

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