The N9 week: Hack-A-N9, gotoVienna, Camerra, gPodder

While the first week back in Vienna after the holidays was sad for a Maemoista walking around in the city (aka Admazing (sic) Everyday), there was also enough time to release gPodder 3.0.3 (already in AFM - thanks, testers!), catch up with local Maemoistas at the Hack-A-N9 and work on gotoVienna, the Camerra hack and even more post-3.0.3 gPodder goodness. But one after the other..

gotoVienna is a public transport live ticker app by kelvan. In the days after meeting at the Hack-A-N9, we implemented a nice line number input UI that makes it easy to quickly get live information for a given line - the code is in Git, and as a side-product, merlin1991 has implemented a stdeb/distutils extension to inject an Aegis manifest and create the digsigsums file - check it out if you want to build Python packages for Harmattan without Scratchbox/the SDK.

Next up is the Camerra hack, a quick'n'dirty "app" that monitors the Volume+ hardware button and (when the Camera UI is in the foreground) simulates a click on the shutter button, effectively making the Volume+ work as a shutter button. Ideal for all your self-portraying needs! It's called a hack, because it uses the likes of xprop and xresponse directly - a "proper" implementation would use QmSystem, XTest and Xlib from C/C++, just in case someone feels like spending time on rewriting something that Works For Me ;) There's a support thread on t.m.c, the Python and PySide powered code is available on Github, and the package is available on the website and (hopefully soon) also on Apps For MeeGo.

As for the post-3.0.3 gPodder goodness: Episode list filters (bug 1527) are currently being developed, a first patch is already written, and screenshot 1 and screenshot 2 show you how it currently looks. Don't forget to report any bugs and feature requests over at bugs.gpodder.org - don't keep them for yourself! :p

And now for the next two weeks for something completely different (i.e. Uni semester wrap-ups, exams, lab interviews and lab exercises).. ;) Enjoy the newly released stuff!

This weekend's releases: Tap Tap N950, qw.py and the IP Address Widget

Over the weekend, I've pushed out some code for your enjoyment: First up is the incomplete but maybe interesting QML source code of the Tap Tap N950 prototype. I probably won't find time to work on this, but it would be sad to let the small piece of code rot - maybe someone wants to pick up the development of it. I'll answer any questions related to the code in the thread :)

Next up is the open source release of the qw prototype "qw.py", which has been developed during the Super GameDev Weekend 2010 at the Metalab Vienna last December (the next one is at the upcoming weekend; stop by if you are in Vienna!) - nearly 1 year ago. This is not the same as qw The Game in Ovi Store, but it's an earlier version, which still contains multi-player support (4 players on one PC keyboard), and it's written in Python, so it should be easily hackable.

And last but maybe not least is the IP Address "Widget" for Harmattan. This small hack (which is inspired by the earlier Calenderr calendar icon hack) makes use of the fact that the Harmattan UX reloads the icon of an application whenever the .desktop file or the icon file itself changes. The details (and a .deb for easy installation) can be found on the website - basically it shows a way to have semi-interactive "widgets" on the app list on Harmattan. I'm sure that creative readers can come up with some cool ideas :)

Hack Tuesday: Tap Tap N950 and Calenderr

The unexpected lack of lectures today (Tag des Landespatrons) left time for some one-off hacks, and here are two for you:

First up is Tap Tap N950, a very basic QML prototype of what could become a funny DDR/TTR clone - no code published yet, it still need some more polishing (and touch area support for multi-touch, plus scoring is also missing).

The other one is a simple hack to make the Calendar app icon always show today's date (day-of-month). The existence of calendar icons for each day (1-31) in the theme on the device lets me suspect that this feature was either planned and then abandoned or that it will come built-in in some future firmware. For now, you can grab this lame shell script and execute it (ideally with "nohup" - see the comment inside - also needs customizations if you changed your root password, and you definitely need developer mode for now) to have an auto-updating calendar icon until the next reboot. Watch the accompanying video for a quick demo. There's now also a forum thread for support and discussion. Sometimes I really wish cron was pre-installed on Harmattan..

Bonus exercise: Store your app's .desktop file in /home/user/.local/, generate the icon dynamically via code and update the .desktop file for some icon overlay action / new items notification ;)

N900 camera protip: Get rid of flash reflections

I think it was during MeeGo Conference 2010 when I was first told that I should cover the N900 camera cover's blue and silver bevel with a dark color to prevent them from reflecting the flash light and making the photos worse than they could be. If you don't use the N900 with flash at all, this "hack" doesn't apply to you. Otherwise read on. If you look at the N900's camera cover, you see that the camera hole is surrounded by a blue border on one side, and silver borders on the three other sides:



Now, when you take a photo with the flash, the flash light is reflected, which makes the taken photo to appear as if there was some smoke or fog in front of you. In reality it is the reflection of the bevel. So, take a black marker and take off the back cover of your N900 (you don't want to accidentally cover your camera lens with black color!):



Now carefully cover the silver parts around the camera hole (and the blue part too, ideally) with black color. The result should look like this:



You might get even better results if you take a marker with a finer tip or even use black spray paint or something. If you don't have a marker ready or do not want to paint on the back cover, you can also take off the back cover of your N900 (which has the same effect), but you will probably need a small magnet to trick the magnetic switch into reporting "camera cover opened" to the camera application.

Charging a BL-5J (N900) battery in the N810

There are several reasons why you would like to charge your N900 battery in a N810. Maybe you have a spare battery that you want to charge while using the other battery in your N900, or maybe your N900 refuses to charge the battery by itself. Please note that even though it works for me, the standard disclaimer applies - it's all your fault if this destroys your devices and/or batteries :)

Now, let's have a look at the pinouts and connectors of both batteries:

So, the connectors seem to have the same size, even though the batteries do not. Trying to put the N900 battery into the N810 is not straightforward, as there is a white piece of plastic that prevents the battery from getting close to the connectors. The solution is to simply use the N810 stylus as a lever to push the battery towards the connectors:

After the stylus and battery are fixed, simply connect the N810 to the power adapter, and it should start charging. Thanks to Quim for this helpful hint :)