PySide2 (Qt with Python) doesn't detect compositing (X11 and Compton) - No transparency

python1212

My script uses PySide2 to use Qt in Python. The script requires transparency (can see desktop behind window).

I use Ubuntu with X11, LXQT and Compton. Also tested with LXDE and XFCE without success. Transparency works for regular windows like browser and text editor, but not for my python script.

Transparency is set via background: url(bg_with_transparency.png) but I also tested with rgba color and w.setWindowOpacity(0.5) without success.

Following flags are set: (Window must also be click-through)

w.setWindowFlags(w.windowFlags() |
    QtCore.Qt.WindowTransparentForInput |
    QtCore.Qt.X11BypassWindowManagerHint |
    QtCore.Qt.WindowStaysOnTopHint |
    QtCore.Qt.FramelessWindowHint)
w.setAttribute(QtCore.Qt.WA_TranslucentBackground)
w.setAttribute(QtCore.Qt.WA_NoSystemBackground)

Without WA_TranslucentBackground and WA_NoSystemBackground the image displays with a black background instead of transparency. When I enabled these flags without compositing, the window displayed pure black. After I enable Compton, the window does not display at all (no error) and QtX11Extras.QX11Info.isCompositingManagerRunning() returns false.

How to fix this? I prefer to use PySide2 and Python but I am open to other GUIs or programming languages, as long as the script works with Ubuntu and has following features:

Transparency (background is PNG with rgba)
Click through capability
Always on top

Thanks.

SGaist

Hi and welcome to devnet,

Did you also try that with PyQt5 ?