Shaped toplevel Widgets

[Jupiter]

Hi,

im experiencing with shaped top-level widgets. F.e. ShapedClock example. In my Project I'm using raster Paintengine on all platforms.

running ShapedClock example on Windows with raster engine works fine. But when i change the graphics system to raster on mac, the mask is ignored and the shaped clock is simply rectangular. Is this a bug? Or is there a Workaround?

Thanks in advance

[Jupiter]

update:

I've tried several widget attributes now (f.e. WA_translucentBackround, no_systembackground etc) but it still doesn't work. Does anyone have an idea?