Calendar days should not be clickable when no calendar app is installed

I've reviewed the specification here and left it as it is. When Evolution is not installed, the monthly calendar should still be present (dependent on the checkbox in Time & Date settings), but should be insensitive.

I think it would be nice if the applet would show events from other calendars. Maybe ship Thunderbird (which is already default) with Lightning already installed, and let the indicator read Lightning events? From what I understand, it is currently hard-coded to only use evolution-data-server. A couple more choices in what the indicator could read, and problem solved. Of course, that takes a lot more work. Had I more experience with such things, I would help, but alas, that is not the case. Just my 2 cents.

GtkCalendar doesn't have a mechanism for making individual days unclickable. We can set the entire widget to be insensitive, which allows month/year navigation but makes all the days unclickable. We could use this when evolution isn't available and/or when the user doesn't have the current month selected.

Please make it work with Thunderbird/Lightning as mentioned in post #2!

Hunter and Alexander, thanks for this suggestion, but it belongs in its own ticket where it can be handled separately from this bug. This bug is about what the indicators should do when $SUPPORTED_MUA isn't installed, not what the value of $SUPPORTED_MUA should be. Thanks!

My notes in comment #3 were just plain wrong, you can't continue to navigate a GtkCalendar widget when it's insenstive.

There doesn't appear to be any way to achieve this with a stock GtkCalendar -- let's defer this until after 12.04.

Adding Ayatana-Design to make sure everyone's aware of the previous comment

Hi MPT, could you take a look at this bug, thx!

Status changed to 'Confirmed' because the bug affects multiple users.

Clearly this isn't "high" as it hasn't been worked on.

I imagine this will be fixed after we get a calendar widget on Unity8.