QMessageBox::about() closes the application

[M.]

Hi,

I am developing an application which doesn't have top level window. Only a system tray icon. When I choose the about action in the system tray menu, it displays the About dialog and after I click Ok, the application quits. If the top level window is displayed, the About dialog doesn't terminate the application. I am using Qt 4.5.3 and Ubuntu 9.10

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();
}

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Method, displaying the About dialog

void MainWindow::aboutDialog()
{
    QMessageBox::about(this, trUtf8("Title"), trUtf8("Some text"));
}

void MainWindow::aboutDialog()
{
    QMessageBox::about(this, trUtf8("Title"), trUtf8("Some text"));
}

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EDIT:
Solved the problem by setting QuitOnLastWindowClosed property to false. Sorry for bothering you

[bobby]

Just to help a little,
QMessageBox has a special value for about dialogs.

Basically it pulls the main program icon for the Icon to display within a normal dialog (instead of the warning/critical/question/etc) and sets up a basic dialog to add text & what not.

QMessageBox::about(this,tr("TitleGoesHere"), tr("This program is about dialog info here"));

QMessageBox::about(this,tr("TitleGoesHere"), tr("This program is about dialog info here"));

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More info here: http://doc.trolltech.com/4.5/qmessagebox.html#about

I just recently used it and I thought I could save you some trouble, or at least tidy up your existing program.