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Qt Installer test avalability of GUI windowing system

  • I am using Qt Installer to package my work. I am trying to have the installer logic check and see if GUI is available before I fire up all the dialog boxes within my installation process. Sometimes, installation can happen in a shell window with no windowing system and in which I want to do something else.

    I am unable to find a way to do this "GUI windowing" check to determine if windowing system is there.
    Any pointers on this much appreciated!

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