Maemo App Development - One Year Ago

I just realized that one year ago, I was giving a talk about Maemo Development at the Metalab here in Vienna. Back in January 2010, things were still very much different from today:

• Scratchbox was the SDK - Linux only, VMs for everything else
• No proper IDEs for Hildon development (there was Eclipse integration, but I never used it)
• Qt still was "the new stuff that's coming up" for Maemo development
• Mer was still something to look forward to
• MeeGo didn't exist - Maemo 6 was the future ;)
• MADDE was in Technology Preview state - not widely used
• Direct UI (now MeeGo Touch) was thought to be the future toolkit
• Qt 4.6 was just released in December - no QML in Qt yet

It turns out that we are in a much better position now, we've got a nice cross-platform IDE (Qt Creator), a proper SDK (Qt SDK) that works on Windows and OS X the same as on Linux and the "low-level" issues (optification, packaging, ...) are handled by Qt Creator mostly.

Today, the issues are different - I'm complaining about Qt Creator (from the Qt SDK 1.1 Preview) crashing a lot in QML design mode, I can deploy my apps to Symbian devices without much effort (didn't think I would ever do that) - even though there's no proper toolchain for Linux or OS X (Remote Compiler doesn't count). The Qt Quick Components are still not released, even though I'd love to create some great apps with them. And most people forget in the N9 rumor jungle that we have still got the best Linux-based mobile OS (with Linux userland) that exists in an actual product that you can buy right now (that's Maemo 5 on the N900 if you didn't get that hint..). Just like Duke Nukem Forever, a MeeGo handset will be announced and released eventually - give it some time.

Back to the "Qt Creator shouldn't crash when editing QML" developer story: We're not there yet, but comparing the current state with the state one year ago, that's some progress right there! Looking forward to those bits falling into place in the upcoming months.

MeeGoConf 2010: Fun, QML, gPodder, Python

I've attended the MeeGo Conference 2010 in Dublin this week. Meeting people, playing werewolf or table tennis and discussing MeeGo Python are just some of the great things about this conference.

One of my burning questions for third-party app development ("QWidget? MeeGo Touch? QML? Which one of those?") was answered with "QML". I've played with QML before, and it's great, but right now, one has to work on a very low level (as in "design your own buttons") and without any UI style guidelines. Let's hope the Qt Components provide reusable UI parts there and that the style guidelines are published as soon as possible.

I've also got some gPodder feedback: Niels suggested subscription pausing and auto-deletion of episodes (both are already implemented and just need exposure as UI elements). Murray suggested a custom TreeModel implementation for the episode list, which I've started working on now. Mike suggested the often-requested multi-episode deletion feature, which is also something I plan for the next release.

On Wednesday, we had a Python BoF to discuss the state and future of MeeGo Python. I'm looking forward to using PySide for the QML UI of gPodder. A PySide/QML workshop is planned for the next PyUGAT meeting, so join in if you are in Vienna in early December.

Oh, and the IdeaPad that we got from Intel is great. Thanks a lot for that. Will come in handy for prototyping and testing Touch UI interfaces!

Hope to see you again in a future MeeGo event :)

Fast MeeGo Handset UX on a N900 (Video)

I've had the chance to play around a bit more with the MeeGo Handset UX on the N900 yesterday (1.1.80.0.20101001.1). Carsten provided experimental graphics drivers, which still crash at a few points, but for the first time provide acceptable performance in the UI. I also decided to build the gPodder MeeGo Touch Prototype UI against libmeegotouch. Unfortunately, there's no SDK yet, so I had to use zypper on the device (via SSH) to install libmeegotouch-devel, make and gcc-c++ and then take a long coffee break after entering qmake ; make. As it's using plain Qt, the TRG binary built from the Fremantle SDK worked fine on the device.

If you don't see the embedded video, click here: MeeGo Handset UX on a N900 (w/ TRG, gPodder UI test, HW-accelerated).

Playing around with MeeGo Touch

While the MeeGo Touch Python Bindings are still not packaged and released, I though I'd give the C++ library a try and have a look through the class hierarchy. After getting the basic "Hello World" app running, I decided to create an application that can load the list of subscriptions from gPodder's SQLite database:

This view uses MContentItem, which already provides an icon and two lines of text - correctly styled and ready to go. Menu and toolbar items are MAction objects that can either appear everywhere or only at specific places (e.g. only in the toolbar). The great thing is that this all works on your Desktop in a normal window, so testing applications on your computer will be much easier with MeeGo Touch than it is with Hildon (which does not really run without its own hildon-desktop session in Xephyr).

The screenshot above is from the prototype written in C++, and shows how a gPodder MeeGo UI could look like. The MeeGo Touch UI of gPodder will be implemented in Python once the bindings are ready - the framework seems to be fun to work with so far. If you would like to play around with it yourself: MeeGo Touch is available from the MeeGo PPA of Ville M. Vainio if you are on Ubuntu and don't want to build it yourself.

gPodder running in the MeeGo Handset UX for N900

Three days ago, a new MeeGo Handset UX image has been released for the N900. I wanted to try out gPodder on it to see how far I could come without any coding...

It was quite easy to get things going: Download the image, dd it to a MicroSD card, boot the kernel (detailed instructions) and set up USB networking. After that, I could ssh into the environment (the root password is meego) and have a look around.

Instead of using apt-cache and apt-get to search for and install packages, I utilized yum to search for and install PyGTK. Then, I used rsync to copy my Git checkout of gPodder to the device. There are two additional dependencies for gPodder that aren't yet available in the MeeGo repositories, namely feedparser and mygpoclient, so I just copied the Python modules from my Laptop into the src/ folder of the gPodder checkout. Then, just switch to the MeeGo user (su - meego), make sure that the DISPLAY variable is set (export DISPLAY=:0) and start gPodder from the source folder (with bin/gpodder - it automatically loads the modules from the right path) - gPodder says hello MeeGo.

The basic functions work, it's just that the Desktop UI isn't suited for mobile devices (the MeeGo compositor/decorator also has several problems, but that seems to be a more general problem). Python bindings for Hildon aren't (yet ?) available, so I could not test the Maemo 4 or Maemo 5 UIs, but I would like to do a proper Qt/MeeGo Touch-based UI for gPodder, anyway. Let's hope the PyMaemo or PySide teams are quick to release bindings and make them available in the MeeGo repositories, so Python developers can create usable UIs for MeeGo handsets :) Oh, and two MeeGo-Python facts: It comes pre-installed in the N900 image, and the version shipped is 2.6.

In short: Apart from the UI framework, everything is already in place (and working) for Python on MeeGo. With the recent release of Qt Mobility for PySide, let's hope that MeeGo Touch bindings are not that far away.

headphoned 1.9 for the N900 is now in Extras-Testing

The beloved Headphone Daemon, who usually sleeps in the darker corners of your N900 and makes sure that you do not embarrass yourself in front of other passengers or pedestrians with whatever kind of experimental music you happen to listen to when the headphones are accidentally unplugged (also known as public transport situations) got a small facelift (also known as code change).

A few changes that have accumulated over the last few months have now been packed up into the shiny new 1.9 release:

• Support for libplayback / whitelisting (by Faheem Pervez)
• Support for pausing Martin Grimme's MediaBox
• Detect headphoned disconnect during active calls and send pause command after the hangup

The last one in this list might be of special interest to some of you who have complained about headphoned not working when the headphones are unplugged during a call. This won't happen now, as headphoned now monitors the call status via D-Bus and keeps track of active calls. When the headphones are unplugged while a call is active, the pause signal will not only be sent right away, but also a second time when the call gets disconnected. This work for all types of voice calls, and should work for video calls as well (untested).

During the summer holidays, I have had less time to do more development and releases, but things are starting to move slowly again - expect new releases of packages like gPodder and MaePad in the upcoming weeks. I'd also love to port gPodder to Harmattan and add a fancy new MeeGo Touch UI on top of it (in March I said that Maemo 6/MeeGo is for later this year - which might be very soon now), so you can all enjoy your favourite podcatcher with the usual native UI support. Let's hope that the Harmattan SDK and/or Harmattan developer images get released for the N900 soon (and then the Python bindings soon afterwards - the PyMaemo team was very fast in previous release cycles), so the community developers have enough time preparing their apps for the next big release.

For now, please test and enjoy this new headphoned release, and don't forget to vote for and comment on the package once you have verified the new release from Extras-Testing.