Back when I switched from Debian to Fedora, the biggest, and hardest to get used to, change was the fact that the bash prompt looked like this:
Not having the full directory in the pathname had always been hard to get used to, but as I learned to delve deeper and deeper into source trees, that became really nice. And then (I think, feel free to correct me) Pinochio at Akademy reminded that that setup has its own set of limitations, and it was more and more clear that having only part of the PWD in the prompt could be an annoyance, particularly as I used pwd to constantly check whether I was in a CMake build dir, or the source dir. Well, not any more.
bash’s ability to colorize things suddenly rocks hard.
I found it useful, feel free to hack on it, make it less craptastic… I picked the worst possible I-hate-Bash-Scripting way of doing this, perhaps some gurus can improve ...read more...
At last Tokamak (Plasma developer sprint), I’ve made a small KWrite proof-of-concept patch just to see how it will behave with the new activities framework – notifying system when it opens and closes a document. A lot of time has passed since, and activity classes were completely revamped, turned upside-down, went through one API review, and moved from the playground to kdebase/libs.
That original patch doesn’t exist anymore, and even if it did, it wouldn’t work for all the changes that were made to activities.
The uber-awesome KDE conference – aKademy – was a time for something new!
Ok, after this introduction you’d expect that I’ve written another patch for KWrite. Well, you’re wrong. The first application that supports activities as a client is Vim!
The main reason I went for Vim this time was to prove that non-kde apps can work with our awesome concept of activities. Another reason is that I didn’t want to use KActivity* classes, so that I can see whether the d-bus ...read more...
The second openSUSE conference takes place in Nuremberg, Germany from october, 20th to 23rd. After its great start last year, we will continue the concept of a user and developer conference around the openSUSE Project including talks, workshops and BOFs. Expect everything between technical workshops about bleeding edge linux distro technology over user presentations about software to inspiring discussions with other projects, especially since the motto for the conference is Collaboration across Borders.
The first conference has also shown how important the openSUSE Conference is for the steering of the openSUSE project. Lots of ideas could be discussed and implemented quickly but also difficult or controversal community internal topics came up in a very contructive way and are worked on since then, some until today.
That brings me to the core message of this post: You should be on the ...read more...
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For months and months now, my Linux Desktop is suffering from one particular issue, which makes it a pain to use on a daily basis: After having it running for a few hours, suddenly X.org and KWin go bonkers and start eating up all my cpu horse-power.
It's not uncommon to see X.org spiking up to a whopping 60% CPU usage, followed by KWin using roughly another 25%.
Since I'm suffering from this issue now ever since I switched to KDE 4, I thought it's time to turn to you fellow KDE developers for some good advice, since all my undertakings to resolve the issue have failed:
I have tried to switch to a different / newer graphics card, experimented with various versions of the NVidia driver and tweaked X.org settings, have turned off various desktop effect plugins, switched between XRender and OpenGL, even re-installed Kubuntu on a new machine.
No dice, though... after it's been running for a few hours my desktop is completely unusable. Every mouse ...read more...
I don’t have to tell you how great Akademy was; others on the Planet have already elaborated on this quite extensively. The only bad thing is that I had to depart on Tuesday. (Also, my plane to Helsinki was delayed quite a bit, but that’s another story.)
Those of you who were there probably remember the keynote of Aaron who wants us to put a focus on elegance. Details. The small things that distinguish good and useful programs from great programs. I soaked this message up like a sponge, and started working towards more elegance in our beloved jigsaw puzzle game Palapeli immediately after the keynote.
There are already quite some visual improvements which we are working on for Palapeli 1.2 (KDE SC 4.6): During the next week, the bling-compatible Goldberg slicer will be integrated into Palapeli as the new default slicer (I have just renamed it to “Palapeli Slicer Collection” to reduce confusion over the name). This will give us more natural and random piece shapes, and more grid types ...read more...
Since this is relevant among others for Parley I am posting the article also here:
It's just two weeks ago that I started to merge the dictionary data for Ambaradan in our loader application: this is needed to make sure data is in the right shape and we won't loose any.
Well, this morning I told Outi that Joola, one of the languages she cares about, was uploaded and she wrote she'll never forget this day: the last day of the Football World Championship and Joola online.
Quite some languages were still missing, but she was right: today had to be the day ... I wanted to finish before the Champion is known: and here we are :-) the data is up and we still don't know the World Champion of 2010.
It's also quite some time now we are following 1GOAL on facebook, because they want education to happen, well: it's great that there are so many fans and we hope that many of the fans also ...read more...
With Akademy and other stuff going on, it looks like the report on the KDE Finance Sprint didn't make it to the front page. I would like to thank Guillaume and the other people who helped put the report together, and of course, the board, Claudia, Thomas snd Syrocon, who enabled the sprint to happen at all.
I snuck away from Akademy on Friday morning. My intention was to sign some legal documents (part of a resolution of the AGM of the KDE e.V.) and say good byes to all and sundry, but that got terribly sidetracked. The usual experience of walking into Demola is people saying “Hey, [ade], I need to talk to you.” I don’t imagine this is unique to me — there’s so much coordination that goes on at Akademy when you finally have every sub-project on hand to chat with. So I ended up with a long talk with Elias about truth in advertising, and then I tried to print and sign and scan the document at hand. Kaare, a guy I’d exhanged some banter during the day trip, wandered over. It turned out that Kaare is the Skanlite dude, so I took the opportunity to thank him for his work.
Then rushed goodbyes — I skipped the whole of floor 4 with the BoFs — and off to the bus. Milian, Niels, Richard and Lubos were on the same flight, and ...read more...
I'm very happy to announce you that the reverse geotagging widget is finished! This was the first part and maybe the most important part of my project in this year Google Summer of Code, so I'm glad to see it working.
Now, perhaps some of you will ask: "Ok, but what is reverse geotagging?" Well, it's a process that reads the GPS coordinate inside an image and then tags it with address elements(country, city, street...).
I actually wrote parts of this blog post past friday, so just pretend aKademy has just ended while you read this.
All good things come to an end, and aKademy is of course no exception. Demola is closed, and tomorrow the taxis, buses, trains and airplanes that will bring us home will inevitably depart on time, and even though we may not want to, we’d better be in them.
I want to talk about a few highlights of aKademy this year. It’s been my first one, so I can’t compare to earlier ones – but I promise I will be able to compare next year’s aKademy to this one!
Possibly the most amazing thing this aKademy was the fact that I finally met Diederik and Valerio, two other KMess developers. We planned to come together, and it’s been great. Next year we’re going to try to pull the rest in too, which means there’ll even be some Australian blood. We will also probably have more realistic expectations of how much work you actually get done…
Yep, I didn’t have time to blog during aKademy as you may have noticed The main reason is that I had a lot of discussions and attended to a huge number of BoFs. This aKademy rocked just as the others that I went. Huge thanks to the organization team, KDE e.V and sponsors for providing ways to make this happen and to have a lot of KDE hackers there!
Instead of doing a technical blog today, I will just say that during this aKademy KDE ‘called home’ for the first time. This means that for the first time in history we had KDE running on a mobile phone and we made a call with it! This was AWESOME! Just a summary: Plasma-Mobile and a plasmoid that worked as a dialer did the work, using the phone API of Maemo5 on a N900.
As Aaron noticed, our first call was a little bit more “interesting” than Graham Bell’s one. The first words on a telephone in history are:
Today I saw a post by The Linux Critic. In the post the author, Trent, says "I’m really not a fan of the new Amarok", which naturally got me curious as to why. After all, if you don't know what problems people have with your software, it can be hard to improve it.
I had never interacted with Trent or any other member of The Linux Critic before, nor had I ever visited their site. I was there with the best of intentions.
I'm going to let the discussion we had speak for itself. I've reproduced it below, because Trent started removing my comments and modifying his own. You can see the original blog post here -- it's not even really relevant to most of the ensuing discussion -- however I strongly recommend, in case further modification has been made to the discussion on that page, that you read the reproduction of the discussion below which is accurate as of the time of writing this post. At the ...read more...
kate-editor.org now contains all articles from the old page still applicable to Kate in KDE 4 and in addition all blog entries of Dominik which are Kate centric.
Beside that it will aggregate the blog entries of Milian for Kate
Still, a lot of work is needed. We already got an offer for help to beautify the page by a web designer, still content writers are missing. You have a nice short post about how to use Kate best? You have some howto? Just contact us or me in private. We can either give you an account on the page or just add your content if you like that more.
OK, once again I didn’t quite manage to write a blog each day… It always starts well and then the hackathon kicks in.
The last three days, I had more meetings again. We made quite some progresses on our plans for Solid. I even got some more people to write on backends for libsolid, really neat. Looking forward to share the load in this way.
Of course hacking in between, and in particular today where I made quite some progresses on the new version of Zanshin which I neglected completely for the past year. Also notable was yesterday day trip, we spent the afternoon next to a nice lake. Kind of reminded the day trip in Glasgow, except that we had great weather this time, and hungry mosquitoes.
People started to leave already, I’m part of the last group of fearless hackers here. Tomorrow it’ll be my turn to move back home, not really looking forward to the trip itself, but having some rest at home will be welcome after such a hectic and ...read more...
Faster here however must be taken with a grain of salt as the new code is not always guaranteed to be better pipelined.
And of course, it's trivial to beat this generic C code with architecture-specific hand-rolled assembly.
git show cbc22908 commit cbc229081a9df67a577b4bea61ad6aac52d470cb Author: Ariya Hidayat Date: Tue Jun 30 11:18:03 2009 +0200
Faster quaternion multiplications.
Use the known factorization trick to speed-up quaternion multiplication. Now we need only 9 floating-point multiplications, instead of 16 (but at the cost of extra additions and subtractions).
Callgrind shows that the function now takes 299 instructions instead of 318 instructions, which is not a big win. However I assume the speed-up has a better effect for mobile CPU, where multiplications are more expensive.
We initially started the push for location-aware desktops around 2006, and now the efforts are finally starting to bear fruit. Both Zeitgeist and Nepomuk are looking at indexing documents based on where you accessed them, Telepathy can share your location with your friends, and hopefully soon also your desktop clock will switch timezones when you travel.
It was nice to have attended Akademy again. Everything was well organized and the talks were interesting or entertaining. Or both. Particularly the improvised KDevelop presentation managed to impress.
Tampere was also a good venue. Big enough to offer a variety of place to stay, eat and hang around. But not too big as everything was still in walking distance. The Finnish people also showed their strong side of being gentle during the day and party professionals at night. One exemplary experience: while laying in a park on the “day after” some guy who apparently had too much to drink heavily throws up under a tree. As if nothing happens he opens a can of beer, lights a cigarette and walks away.
The only not so nice thing was the trip home: I had been heavily suffering from delayed baggage on several international trips during the last months. Up to a point where people around me started to switch from pity to amusement. Arrived at Helsinki airport one convenient hour before departure. More than enough time for a passenger to ...read more...
A source tarball for the alpha version Bangarang 2.0 is available here.
This alpha phase will be a relatively subdued affair. It mostly intended as a nearly-feature-complete sneak peak for fans of the app. As our team is very small and our bandwidth is limited, we’re focusing our efforts on getting to feature-complete and into a more formal beta testing phase at which point we can focus on bug-fixing and polishing. A more detailed release announcement will accompany beta and final release.
Of course, this is pre-release software and, as with all such software, it may have an unpredictably voracious appetite for kittens and puppies and all things of universal cuteness and value.
Important: If you elect take a look at this alpha release, the first thing to do is to go the “Media Lists” view and select Advanced>Update Ontologies from the dropdown menu in the upper right. Bangarang 1.x stored media information in the nepomuk store using a draft version of the nepomuk shared desktop ontologies that was not ready at the time of the 1.0 ...read more...
Day 5 of Akademy was spent hacking too. Then I had a great meal at Plevna), Tamperelainen, which was mashed potatoes + lingonberry jam + Tampere’s famous blood sausages. Well it lived up to its expectations, the sausages were definitely good, but different. It was kind of like sabudana vada. Unfortunately Germany lost :( The final will still be a good watch though. Once again, I would like to
Akademy 2010 was an awesome success! I really enjoyed the time here and had really no time to blog anything. I'm currently staying at the amazing Demola building here where hackers can just do whatever they want. I've just committed a bunch of stuff into PMC and I'm going to give a brief overview of what i did.
Way more elegant with...
I've just added a bit of blur and opacity adjustment to the reflections and they now just look quite better (imo). Sane use of caching makes everything still smooth and slowdowns-free and therefore enjoyable.
...initial gestures implementation
As already mentioned in my talk at Akademy PMC is going to support gestures. This won't only allow common gestures on multitouch input devices but, most importantly, will ease the integration of different input devices. As I like to mention often, you'll be able to comfortably lie on your sofa and browse through your ...read more...
This is mostly a post for our distributions. In 4.5 we will most likely activate the Blur effect and Lanczos filter for Taskbar Thumbnails and Present Windows by default. Unfortunately not each driver supports those correctly. We have the following possible problems:
Performance issues with Blur Effect
Upside-Down taskbar thumbnails with Lanczos filter (affects also Present Windows)
Too bright taskbar thumbnails with Lanczos filter (affects also Present Windows)
Performance issues with Lanczos filter in Present Windows
Most users won’t have problems with those two new or if there are problems they affect only one of the two. E.g. disabling blur for performance does not require to disable the Lanczos filter. Therefore I implemented a KConfig based blacklist during Akademy. It uses KWin’s default KConfig file (~/.kde+/share/config/kwinrc) and uses KConfigGroup "[Blacklist]". The blur effect uses the sub-group "[Blur]", while the Lanczos filter uses the sub-group "[Lanczos]". This might be extended in future releases.
The blacklist is implemented in a way that specific driver versions for specific hardware are blacklisted. So if a new driver version is released this one ...read more...
Found a bit of time to continue the number crunching saga. Two new datasets are added to the KDE SC Stats topic center. The first data set is about the number of krazy2 issues per module (e.g. kdelibs, kdeedu, etc.): We see two modules that have clearly more issues than the others, kdelibs and kdepim. But, that was to be expected because when we look at the lines of code for these modules: we notice that kdelibs and kdepim clearly have more lines of code than the other modules as well. Actually, the two graphs have quite some similarities which is not completely surprising. One of the things that draws the attention is that we can see that although kdebase-workspace, kdebindings and kdeedu have an almost equal evolving lines of code count, kdeabse-workspace has a significant higher number of issues. Well, as ...read more...
so monday evening was typical akademy chaos. :) A few of us wanted to go to an indian restaurant for dinner… somehow our group of 8 (a reasonable number for not overwhelming a restaurant) was soon 11, and then 13 or 15… then there was some confusion and it was only 5. We did find the place, but it was closed :P so we ended up in an odd “mexican” place instead. decent food, big portions, but… thousand island dressing is not really a suitable replacement for cheese. o.0 After dinner and drinks there was going to be karaoke.. but the place that supposedly had karaoke every night was also closed. :P Directions from locals led us to other closed bars, but eventually we ran into a KDE crowd again. :) So the night didn’t go as planned at all, but it was still fun. :)
Tuesday, the bofs began. I was at the odfkit bof, where jos showed off our shiny things (which I’ll be showing again at thursday’s owncloud bof). I was too hot and tired to ...read more...