Shutter is a screen capture tool, and drawing is its essential part. By default it is turned off, to enable it you're forced to add this line to package.use: x11-misc/shutter drawing It would make much more sense to have drawing set on by default. In case it should be off by default the meaningless tooltip message should be changed from Goo::Canvas/libgoo-canvas-perl needs to be installed for this feature to something that makes more sense, because even after you install that package manually drawing functionality is still not functional, due to this http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/x11-misc/shutter/files/0.86.4-disable-goocanvas.patch?view=markup
I understand the message is pointless as it is. maybe the patch needs to be dropped altogether. However, I don't see the point to force the useflag. Clearly there is no way to satisfy everyone here. I, for example, i have this flag disabled. If you need it, just enable it yourself.
Now that I think about it there is not much to fix here. The use flag description is pretty clear. USE=drawing if you want it to work. Otherwise we are talking about automagic detection of libgoo-canvas-perl and this is against gentoo policies. Some people may have libgoo-canvas-perl installed but may not want this feature enabled and the ebuild will do the right thing for them. So what you are asking here is just a use case specific for you needs. Like I said, we can't please everyone, so having one more entry in your package.use file shouldn't be such a problem.
Ok, I understand that. But you understand the message is pointless, and it fools users (I consider myself a user) into manually installing the Goo::Canvas, and looking through the source code to figure out why it didn't make any difference. Also, what's the point in having shutter installed without that flag in your case? You can easily map PrtScr key to the script described in Gentoo Wiki and that will do the job without any applications installed (http://www.gentoo-wiki.info/TIP_Make_a_Screenshot_with_PrintScreen_Key)
