Cutout Overlay

[Vincent Vinet]

To focus the user into a specific part of the interface, it would be interesting to be able to add an overlay on top of the whole window, masking everything but the region of interest.

[Simon Poirier (simpoir)]

As the sugar.tutorius.overlayer is currently implemented, it would be a matter of creating a widget similar to the overlayer.TextBubble but with a mask to capture events such as mouse clicks and setting its event mask to the non-interesting region. see http://pygtk.org/pygtk2reference/class-gtkwidget.html#method-gtkwidget--input-shape-combine-mask. How the "mask" is actually drawn could be with cairo.fill() with an alpha of, say 0.5f.