title: Python overlay window
body: <p><br />
  In a Python program I want to draw a (possibly shaped) overlay window under the mouse pointer, that should follow it (I already have the code to get its new coordinates on mousemove) and must not interfere with clicks to other windows. My target platform is Linux (KDE) but if it's cross platform it's better. How can I do it, for example with Tkinter or PyQT?<br />
  Thanks in advance for the answers<br />
  EDIT: I forgot to say that the window should support transparency (it will be an alpha blended circle around the mouse pointer)</p>