Run Console Application without any XServer dependency

[rainman110]

This includes the following subissues:

• [ ] https://github.com/dlr-gtlab/gtlab-core/issues/1208
• [ ] https://github.com/dlr-gtlab/gtlab-core/issues/1209

There are multiple ways to run the console app without a proper xserver, e.g.

• qputenv("QT_QPA_PLATFORM", QByteArray("offscreen"));
• using xvnc, which we are using for unit tests
• also, see https://stackoverflow.com/questions/65200690/how-to-run-a-qt-application-in-headless-mode-without-showing-my-gui

[rainman110]

In GitLab by @mariusalexander on Aug 25, 2023, 07:08

See issue #586

[rainman110]

In GitLab by @mariusalexander on Aug 25, 2023, 07:08

marked this issue as related to #586

[rainman110]

A first analysis shows the following dependencies of the Console application:

• batch.cpp uses QApplication (QtWidgets) instead of QCoreApplication. Using QCoreApplication seems to compile at least. I don't know, whether this breaks anything yet.
• DataProcessor uses QtGUI for:
  • QValidator for the validation of string properties. We would need to provide an alternative
• Core uses QtGUI for:
  • QKeySequence in GtSettings to store shortcuts
  • QValidator for the StringMonitoringProperty to check for Umlauts