multiple QT applications on an embedded ARM Linux platform

baklai

I compiled QT 5.13 on an embedded ARM Linux platform and encountered an issue when running two QT applications, A and B. Here are the symptoms:

Two cursors appear on the screen.
When I move the cursor, both applications refresh their UI, causing the lower-level A application to overwrite the UI of the upper-level B application, as if drawing with a cursor.

I tried using

QWindow::fromWinId(qstr.toUInt())

to embed application B into application A, but I received the error message

QWindow::fromWinId(): platform plugin does not support foreign windows. 
QWindowContainer: embedded window cannot be null.

How can I resolve the issue of running multiple QT applications on an embedded ARM Linux platform? Thank you very much.

SGaist

Hi,

You would need a window manager for that. AFAIK, Wayland would be the way to go.

baklai

@SGaist Yes, I have also considered this reason. I will try to see if I can resolve it. Thank you!