Is it possible to draw a custom shaped window in Qt which inherits color and transparency (glass) effects from current system theme. Ultimately I need it to look & feel just like user's taskbar adjusting to his theme. Like in this concept. I realize that it might not be possible to achieve such perfect integration, but at least make a custom shaped background which look the same as the taskbar (glass look&feel) I believe is achievable.
Partially it is answered in similar questoin - Displaying translucent / irregular-shaped windows with Qt. But still not sure how to read system theme information and apply it to QPainter.