With Intrepid on track to hit the wires today I thought I’d blog a little on the process we followed in designing the new user switcher, presence manager and session management experience, and lessons learned along the way. Ted has been blogging about the work he did, and it’s been mentioned in a couple of different forums (briefly earning the memorable title “the new hotness”), but since it’s one of the first pieces of work to go through the user experience design process within Canonical I thought it would be interesting to write it up.

Here is a screenshot of the work itself in action:

In one of the first user experience sessions, we looked in more detail at the way people “stop working”. We thought it interesting to try and group those actions together in a way which would feel natural to users.

We have already done some work in Ubuntu around this – for a long time we have had a button in the top-right corner of the panel which brought up a system modal dialog that gave you the usual “end your session” options of logout, restart, shutdown, hibernate, suspend and switch user. That patch was always a bit controversial and had not been accepted upstream, so we looked at ways to solve the problem differently.

We decided to use the top-right location, because it’s one of the key places in the screen that’s quick and easy to get to (you can throw your mouse into a corner of the screen very easily and accurately) and because there was a strong precedent in the old Ubuntu logout button.

One key insight was that we wanted to make “switching user” less an exercise in guesswork and more direct – we wanted to let people switch directly to the specific user they were interested in rather than have an intermediate step where they login as that other user. So we started with the Fast User Switcher applet, or FUSA, as a base fr the design. Another key idea that emerged was that we wanted to integrate the “presence setting” into the same menu, because “going offline” or “I’m busy” are similar state-of-mind-and-work decisions to “log me off the system” or “shut down”.

Menu order

We discussed at length the right order for the menu items. On the one hand, putting the “other users” at the top of the menu would mean that all the user names – yours and the ones you can switch to – would appear “in the same place” at the top of the menu. On the other, we strongly felt that things that would be used more casually and more easily should be at the top. In the end we settled on putting the presence management options at the top (Available, Away, Busy, Offline). Right next to those (in the same set) we put the “Lock screen” option, because it feels like a presence setting more than a session management setting – you are saying “Away” more than anything else.

Ted did a lot of work to make the presence menu elements work with both Pidgin and Empathy because there was some uncertainty as to which would be used by default in the release. Since it all uses dbus, it should be straightforward to make it work with KDE IM clients too.

We then put the user switching options – including the Guest Session which is a cool new feature in Intrepid that as been widely blogged (check out the YouTube demo) and which uses AppArmor to enforce security.

And finally, the session termination options – log out, suspend, hibernate, restart and shutdown are at the bottom of the menu, because you’re only ever likely to use them once in a session, by definition!

Styling

The design of the menu is deliberately clean. We use very simple colours and shapes for the presence indicators, and replicate those colours and shapes in the actual GNOME panel so that you can see at a glance what your current presence setting is. Ted had to jump through some hoops, I think, to get the presence icons in the menu to line up with the current-presence-status indicator in the panel applet, but it worked out quite nicely. There’s some additional work to tighten up the layout which didn’t make it in time for the release but which might come in as a stable release update (SRU) or in Jaunty.

We decided not to put icons into the menu for each of the different statuses. Our design ethic is to aim for cleaner, less cluttered layouts with fewer icons and better choice of text. A couple of people have said that the menu looks “sparse” or “bare” but I think it sets the right direction and we’ll be continuing with this approach as we touch other parts of the system.

Upstream

This work was discussed at UDS in Prague with a number of members of the GNOME community. I was also very glad to see that there’s a lot of support for a tighter, simpler panel at the GNOME hackfest, an idea that we’ve championed. The FUSA applet itself is going through a bit of a transformation upstream as it’s been merged into the new GDM codebase and the old code – on which our work is based – is more or less EOL’d. But we’ll figure out how to update this work for Jaunty and hopefully it will be easier to get it upstreamed at that point.

In Jaunty, we’ll likely do some more work on the GNOME panel, building on the GNOME user experience discussions. There was a lot of discussion about locking down the panel more tightly, which we may pursue.

Integration into Ubuntu

We realised rather late in the Ubuntu cycle that we hadn’t thought much about packaging. The Ubuntu team had kindly offered to help package and integrate the applet but we definitely learned the value of getting the packaging done earlier rather than later. We had the applet in a PPA for testing between developers fairly early, but we underestimated the difference between that and actual integration into the release.

The Ubuntu team rallied to the cause and helped to smooth the upgrade process for new users, so that we can try to get everyone onto the same footing when they start out with Intrepid whether as a new install or an upgrade. There are some challenges there, because the panel is so customisable, and we had to think hard about how we could ensure there was a consistent experience for something as important as logging out or shutting down while at the same time trying not to stomp on the preferences of folks who have customised their panels. Similarly, we were concerned that people who run different versions of Ubuntu, or different distributions entirely, with the same home directory, would have problems if those other OS’s didn’t have the same version of FUSA – we weren’t really able to address that satisfactorily.

We also realised (DOH!) that we hadn’t thought all the way through the process of integration, because we hadn’t figured out what to do with the old System menu options. It turned out that those were in a state of flux, with the Ubuntu folks having to choose between the current GNOME default which everyone said would change, the patches for the likely NEXT GNOME approach, and the old Ubuntu approach. Ted whipped up some patches to make the GNOME panel more dynamic with its menus, so that we could remove the System menu logout options when people have the same menu in the FUSA applet, but that landed too late for inclusion into Intrepid final.

All in all, I think it’s a neat piece of work and hope other distro’s find it useful too. It’s just a teaser of the work we plan to do around the desktop experience. I’m looking forward to seeing everyone at UDS Jaunty in Mountain View in December, when we can talk about the next round! Thanks and well done to Ted, Martin, Scott, Sebastien and everyone else who helped to make this a reality.

Well done to Team Ubuntu (thousands of people across Ubuntu, Debian and upstreams) who make the magic in 8.10 possible. Happy Release Day everyone!

This entry was posted on Thursday, October 30th, 2008 at 11:52 am and is filed under free software, ubuntu. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.