newbie here using Ubuntu 18.04 LTS
I am coming from the easy Windows world, I am trying to write an Windows Forms dialog application. When writing code I see that we have a choice between Mondo, Qt, Gtk and Tkintker. However, I am also looking for the understanding of how does Linux applications like FireFox show a GUI? I mean I am sure that these applications used something that was here before Mondo, Qt and Gtk appeared, right?
Does anyone know of a simple github project written in C++, hopefully simple means 5 lines of code as it doesn't take much to say Hello World.
I tried installing ubuntu-sdk-ide that was previously mentioned about in a 5 year old post, however, after installing I tried to start it but it just shows "QtCreator, The container backend returns an unknown error status. This is a bug and should never happen, please contact the developers."
note: ubuntu-sdk is here and says it's safe for 14.04. and the current is 18.04, thus any duplicate posts will point to the broken 14.04, and it doesn't say what real applications like FireFox uses. https://docs.ubuntu.com/phone/en/platform/sdk/installing-the-sdk