Created attachment 187432 [details] [review]
AppIndicator API implementation

Unity, in the last Ubuntu, doesn't have a system tray, so it's hard to work with tasque.

They are supporting the new App Indicator model[1] and there is a c# implementation; libappindicator-sharp

With this patch I collapsed the tooltips and the system tray into the AppIndicator.

I'm not familiar with automake/autoconf but I managed to add a ENABLE_APPINDICATOR_SHARP define which excludes the AppIndicator code if the compile machine doesn't have libappindicator-sharp.

Some details:

Application.SetupAppIndicator() creates an AppIndicator menu which has the same items of the PopupMenu (items are linked to the same action); It has also a status label which is managed in Application.RefreshTrayIconTooltip() and a 'tasque' entry for toggling window visibility (like the TrayIcon click).
This method must be run before StartMainLoop().
Glitch: I've no idea where AppIndicator looks for icons, but if you don't have tasque installed it will fail to find 'tasque-24' icon and will not display anything.

I've extracted the tooltip string generation from Application.RefreshTrayIconTooltip() to Application.GenerateTooltip() in order to use it also for AppIndicator status.



[1] https://wiki.ubuntu.com/DesktopExperienceTeam/ApplicationIndicators