After making a non-binding resolution to report my Caribou progress on a weekly basis, I flaked. Of course. But luckily Nohemi has picked up the slack and have kept you all up to date about the libcaribou powered GNOME Shell keyboard in her more binding GSoC reports. So no more architecture diagrams are needed, you all get the idea. But if you didn’t, let me make it clear: The goal of Caribou is to make it easy to implement new on screen keyboards where you would only need to provide the view, and libcaribou will be your model and controller.
It is better to admit now than later: I will not have the bandwidth to continue to work on Caribou as my time is slowly running out. So…

What we need:

• A maintainer.
• A GTK module, Nohemi is working on this, but we will need similar solutions for other toolkits and fallbacks (XIM?).
• Unit tests for the library – libcaribou is gaining features and getting complex. We need some tests here.
• More keyboard layouts/languages.
• More function keys for the switch scanning keyboard.
• Finer interaction modes:
• Modifiers, use latching and traditional key gestures with multitouch.
• Respect AccessX settings for sticky/slow/bounce keys.
• A more hardware-like interaction where keys will auto-repeat when held down.
• etc.

• … and automatically choose the right mode for the keyboard without comfusing the user.

• Revisit the “X adapter” and maybe use something more high level.

Anyway, plenty of exciting work. Are you at the summit, please find me if any of this interests you.

I am getting really excited about the Open Source Bridge conference in Portland next week. It feels like most Open Source meetups I have attended lately have been on the other end of the Atlantic. It will be nice to be in my element, for once. It will also be nice to meet cool localish people. I am planning to train down there and bring my bike. I hope to see you there!
I’ll be talking about inclusive design.

Hi again.
Since the last time I wrote to you, dear bloggy, I have been working a lot on Caribou, made a trip to welcome Jenny back from Haiti, and crossed the continent by rail.

Let’s talk about Caribou, so much has changed!

Antler

Antler is the Keyboard UI that is bundled with Caribou. It does not have the pretension of being ready for users any time soon, it is more a sample implementation of a libcaribou keyboard,and a place for me to try stuff out and see if it would work in our platform. You could follow Nohemi‘s progress to catch up on how libcaribou is being used to power the new GNOME Shell keyboard UI. With all that said, Antler is still kinda cool. Here is a crappy video of Antler’s touch keyboard in action:
[youtube http://www.youtube.com/watch?v=y2dJRC-YoIs&w=560&h=349]

Scanning Support

I redesigned Caribou’s switch support from the ground up with the goal of simple configuration. There is still plenty of more work to do, but after looking at commercial alternatives I feel like we could do a pretty good job. Here is me typing text solely with the right shift key:

[](/assets/uploads/2011/06/caribou_scanning.gif)

Input Method Support (bye AT-SPI!)

This is an experimental tangent, that might or might not be worth the time I spend on it. Recently Caribou master received GTK2/GTK3 input modules that perform DBus calls to the Caribou keyboard, and have it show up when and where it is needed. This has proven to be pretty tricky. I will hopefully follow up with a post about this, and some interesting hacks innovations surrounding these methods. Future work includes writing similar modules for QT3 and QT4. And having the keyboard emit key activation signals that the modules could use for inserting text instead of using XTest which feels so hackish and wrong.

That diagram I drew up earlier this week? I finished implementing it. It is in the badly named ‘geometry’ branch. I decided to take a day or two and redo some of the C stuff in Vala, with the hope that it will make life easier when I start adding a bunch of classes and create the DBus bits. I regretted it when I found myself hand editing vapi files and amending GIRs generated by valac, but all in all, I am pretty happy with the choice.
If I could be sentimental for just one paragraph and say that all the hard work folks have put into GObject introspection is finally paying off. Big time. Transitioning between all these different languages at will is really amazing. I think we are entering a perfect storm where we have an extremely competitive developer story. There is really nothing quite like this. Yay.
Since I spent this week shuffling deck chairs, I don’t have any exciting new visuals. Hopefully soon.