Upcoming event ETA appears to fall out of sync

[Charles Kerr]

Described by ToyKeeper @ https://trello.com/c/S0yjk9mW/2892-893-ubuntu-landing-003-indicator-datetime-dbarth:

> Also, the indicator sometimes gets the wrong time until an event is scheduled to start. As an example, I had an event scheduled for 23:50. At 23:43 I pulled down the indicator and it said 7 minutes 'till. At 23:45 I tried again and it still said 7 minutes. I checked again at 23:47 and it said 3 minutes till. I checked again at 23:50 and it still said 3 minutes. At 23:51 the item disappeared, even though the event was an hour long. So, it updates infrequently and doesn't show events while they're active (except for the first minute).

[Launchpad Janitor (janitor)]

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

[Selene ToyKeeper (toykeeper)]

Thanks for adding this. It's not a huge deal, but it would be nice if it updated a little more often during the last hour or so before an event starts.

[Charles Kerr (charlesk)]

The "7 minutes til" text is coming from unity8.

indicator-datetime passes the event's time to unity8 in the x-canonical-time property, and qml/Panel/Indicators/MenuItemFactory.qml's appointmentMenu code builds its time from calling i18n.relativeDateTime() on that x-canonical-time value.

Ideally, unity8 would have a timer kick at the top of the minute and update appointmentMenu's time property.

A hackier solution would be for indicator-datetime to rebuild the menu every minute. This should have the same effect for this ticket, but it would involve unnecessary bus traffic and IMO doesn't address the problem in the right place

[Michał Sawicz (saviq)]

Possible candidate for the solution: https://developer.ubuntu.com/api/apps/qml/sdk-15.04.4/Ubuntu.Components.LiveTimer/

[Bill Filler (bfiller)]

Filed related bug to track the event being removed prematurely from the indicator:
https://bugs.launchpad.net/ubuntu-ux/+bug/1570619