https://github.com/andreicherniaev/qcoreapplication_quit_example

simpe example How to exit after QCoreApplication::exec()
https://github.com/andreicherniaev/qcoreapplication_quit_example

example qt sigint

Last synced: about 1 month ago
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simpe example How to exit after QCoreApplication::exec()

• Host: GitHub
• URL: https://github.com/andreicherniaev/qcoreapplication_quit_example
• Owner: AndreiCherniaev
• License: apache-2.0
• Created: 2023-01-13T05:13:47.000Z (almost 2 years ago)
• Default Branch: main
• Last Pushed: 2024-09-16T17:47:24.000Z (4 months ago)
• Last Synced: 2024-09-16T21:57:47.441Z (4 months ago)
• Topics: example, qt, sigint
• Language: C++
• Homepage:
• Size: 310 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# QCoreApplication_quit_example

 This is simple example How to exit after QCoreApplication::exec()

 

 Run app and after 3 second QCoreApplication_quit_example will close automatically with message "good bye".

 

 To exit from you infinite cycle QCoreApplication::exec()

 try this

 

    QTimer::singleShot(1000, this, &rial::closeApp); //if you need process some code in closeApp()

 or this

 

    QTimer::singleShot(1000, QCoreApplication::instance(), SLOT(quit())); //if you need quit() only

Also you can use Ctrl+C to exit. If user send Ctrl+C signal QCoreApplication_quit_example will use non-Qt function SigInt_Handler(). It tested on Ubuntu.

# QCoreApplication_quit_SIGINT_example

QCoreApplication_quit_SIGINT_example is more powerfull then QCoreApplication_quit_example. If user send Ctrl+C signal QCoreApplication_quit_SIGINT_example will use Qt non-static method rial::handleSignal(). In this method Qt start QTimer for 3 seconds and after do closeApp(). If user don't press Ctrl+C in console for QCoreApplication_quit_SIGINT_example this app will wating forever.

# How run?

You can run this apps using Qt Creator. You can use external terminal if you need use this way



  

  


    Run proj in external terminal



You can send SIGINT by Ctr+C key. But also you can send SIGINT using Debug mode via GDB console. Before sending "signal 2" don't forget make Pause!



  

  


    	SIGINT by GDB in Qt Creator