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System & Utilities

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Cyrille Berger: Krita’s Hackfest, meeting with the Blender guys

System & Utilities

During this week, Boudewijn is hosting Sven, Lukas and me for a Krita hackfest, dedicated to bug fixing, performance, UI improvement. Among the major improvements brought by that week are improvement in the memory consumption, thanks to a collaboration between Dmitry and me, where I did some tracking and experimentation, and he found the actual problem. This fixed has allowed us to go from 2 minutes of drawing to exhaust my 2GB of memory, to make it possible to paint for more than 30 minutes, there are still some issues that need to be found and fixed. In the area of performance, Lukas have improve the performance of the flood fill by 60%, and I have reduced the time needed for some gradients by six (the other types did not seem to have the problem), unfortunately those improvements are not really visible, for some reason Krita currently spend a lot of time recompositing the image. While Boudewijn and Sven have been working on a scratchpad, as a new way to test new brushes settings, and working on ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 05.03.2010 | Прочитано: 390 | Комментарии

Ariya Hidayat: n900 and its accelerometer

System & Utilities

There is a bunch of code out there (which can be copied and pasted) to grab the acceleration values from Nokia N900. Here I contribute one more, it's Qt-based and using the QtDBus module. The values in x, y, z will have the unit of G.


QDBusConnection connection(QDBusConnection::systemBus());
QDBusInterface interface(\"com.nokia.mce\", \"/com/nokia/icd\", QString(), connection);
QDBusPendingReply<QString, QString, QString, int, int, int> reply;
reply = interface.asyncCall(\"get_device_orientation\");
reply.waitForFinished();
x = static_cast<qreal>(reply.argumentAt<3>()) / 1000;
y = static_cast<qreal>(reply.argumentAt<4>()) / 1000;
z = static_cast<qreal>(reply.argumentAt<5>()) / 1000;

As usual, error checking is omitted (left as an exercise for the reader). Like Star Wars, there is also a reason I skip the first 3 QStrings. Debug it yourself to see what you would get. In addition, I found out that at most it would take 25 ms to grab all three values. It means, if you run your application at > 40 fps, then better put this function is a separate thread. Actually, consider that you don't want QDBusPendingReply::waitForFinished() to block your entire GUI, this is likely a good idea ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 05.03.2010 | Прочитано: 405 | Комментарии

Embed the Konsole (Terminal) to the Desktop in KDE 4.3

System & Utilities

Konsole is the X terminal emulator of KDE. I find having the terminal out of my way, but always open and easy to reach out to, very convenient.


  
Подробнее | Разместил: KDE News | Дата: 05.03.2010 | Прочитано: 413 | Комментарии

Jason A. Donenfeld (zx2c4/jdonenfeld): Trying to Leave Catch-All E-Mail Behind

System & Utilities

For the last 10 years, I’ve used zx2c4.com for my e-mail, and have had it forwarded to whichever provider I was using, which most recently happens to be gmail. Ten years ago, it seemed like a good idea to have “catch-all” e-mail, whereby anything you put at zx2c4.com would be sent to me. This was great for a while, and on every site I would visit that required an e-mail, I’d give them a new one. JasonHatesWhenNikeDotComSpamsHim [at] zx2c4.com I would use for nike.com, and then I’d know for certain if they ever sold my e-mail address. For more serious sites, I would just use their site name or something easy to remember about their site. For personal communications, all my friends knew this quality of zx2c4.com, and would send things to anything they wanted — YouAreAGoofBall [at] zx2c4.com, for example.

This was all fun and games and helped filter out some spam throughout the years, but it seems like it’s time I settle down on one e-mail address. I would also like to find a different domain than zx2c4.com ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 05.03.2010 | Прочитано: 559 | Комментарии

Thomas Thym (ungethym): Finding the kBook

System & Utilities

My wife as well as my sister are looking for a small notebook or a netbook. I did a quick research to find a proper gadget to run KDE on it. I made good experiences with Lenovo, so I started there. One thing was clear to us all: We don't ever gonna pay for a Windows whatever version.

It seems that Lenovo has a "close relationship" with MS. No refund for MS operating systems possible. :-(

Same situation with some bigger vendors and reseller. Lenovo UK wrote in their mail about an agreement with MS only to ship windows with their machines.I have to admit: I'm shocked. Windows only systems where ever you look.

I didn't knew if I should laugh or cry as I read the Lenovo slogan "New World. New Thinking."

Hey European Commission! Wake up! After your success against Microsoft in the browser war here is your next goal: Every computer (esp. notebooks) should be available WITHOUT operating system. The price should be reduced by the cost of the OS.


  
Подробнее | Разместил: Planet KDE | Дата: 05.03.2010 | Прочитано: 435 | Комментарии

Writing a custom widget...

System & Utilities

One of the dangers of having a real interaction designer look at your application is that they are apt to suggest that some special widget might make your app much nicer, much more efficient, much more usable.


  
Подробнее | Разместил: KDE News | Дата: 04.03.2010 | Прочитано: 421 | Комментарии

Chani Armitage (Chani): and life goes on

System & Utilities

why is it that essays are so much easier to write after midnight? no wonder I’m still jetlagged…

I kinda got a little sidetracked this morning – after a long night of waking up regularly and having weird dreams (either suse or archlinux had to go out of business, because… *something*… had happened to a bunch of key people, and I was pretending to be a guy because bad things would happen if this evil lady who looked like my grandmother found out who I was) … well, eventually I decided it was morning and I was taking a sick day, and gave in to the lure of teh intarwebs. And found myself looking at an evil little heisenbug that’s been bothering me for a long time.

I started trying to untangle the panel code once again (plasma’s actually old enough to have some messy cobwebbed code now. huh) and fought with it, and eventually decided that the darn thing just had to be a kwin bug. since I’d spent all that time figuring out what the code actually ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 04.03.2010 | Прочитано: 441 | Комментарии

Edward Toroshchin (hades): Git Is Your Friend not a Foe Vol. 4: Rebasing

System & Utilities

This time I’ll talk about more complex things, which give developers more power over their life. Actually, they just look complex. In fact these are quite natural operations over Git commit history structure, which was described already in my previous posts and gazillions of posts by other people.

So, let’s start with the simplest. Mr. Cleverhead sometimes fails to remember which branch he is currently on. He commits to a branch master, while in fact he should have committed that to staging. What can he do to fix it? He decides to run git show, save the commit as a patch, then checkout branch staging, apply patch there and commit with the same commit message. Well, it happens so that Git already has a command that does exactly this automatically! It is called git cherry-pick. Besides fixing Mr. Cleverhead’s reputation, it is also quite often used for example to backport commits to release branches.

Git cherry-pick

Note, however, that this still requires Mr. Cleverhead to remove his commit from master. We believe in him.

...read more...

  
Подробнее | Разместил: Planet KDE | Дата: 04.03.2010 | Прочитано: 523 | Комментарии

Tomaz Canabrava (tomaz): Community Efforts: Reducing Qt Illiteracy

System & Utilities

The KDE Community is growing really string here in the south part of the globe, with the efforts of Sandro Andrade and his Class ‘how to survive helping opensource projects’ in UFBA ( Federal University of Bahia ), Wagner Reck changing minds of professors and students in Rio Grande do Sul – making them try and use oss applications ( kde & non kde included ), Amanda, Lamarque, Felipe and everybody from KDE – MG doing an amazing job in Promoting the K-brand and a lot more.

I Started giving Qt lessons back in 2008 at LatinoWare, when Piacentini invited me and Sandro to go there and talk about Qt and KDE development, so it’s almost 2 years that I have this blessed job. Usually my Qt classes have 5 to 10 students, and I was pretty confident with my class and knowledge of basic to intermediate Qt.

Now, 2010, I got the biggest Qt class ever, and to be onest, I’m quite scared. I’m gonna teach for a full weekend, from 8a.m to 6p.m a class of 40 students. ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 04.03.2010 | Прочитано: 412 | Комментарии

Will Stephenson: New KDE Four Live Images

System & Utilities

New KDE Four Live CDs with KDE 4.4.1, and much more are up.

They were built with openSUSE Build Service's KDE:Medias project and SUSE Studio and consist of openSUSE 11.2 plus all updates, KDE 4.4.1, upstream branding, Nepomuk enabled and Strigi disabled (because it's a Live CD).

They can be used as Live USB sticks too, see these instructions if you don't know how to dd a file to a device.

You can also install to disk and use it as a normal distribution using the installer on the desktop. Once installed, the first update will pull in all the packages that are normally on an openSUSE KDE install that do not fit on a single CD.


  
Подробнее | Разместил: Planet KDE | Дата: 03.03.2010 | Прочитано: 425 | Комментарии

KDE Software Compilation 4.4.1 Release Announcement

System & Utilities

"March 2nd, 2010. Today, KDE has released a new version of the KDE Software Compilation .


  
Подробнее | Разместил: KDE News | Дата: 03.03.2010 | Прочитано: 388 | Комментарии

Simon Hausmann (tronical): QtWebKit Releases

System & Utilities

QtWebKit is a part of Qt and we’ve always released them together. With a rapidly growing development community we’d like to decouple QtWebKit from Qt’s releases. It is a project on its own, it’s developed as part of the WebKit project and therefore deserves its own release. We’re going to call the first standalone release simply QtWebKit 2.0.


baloon.png

What does a standalone release mean?

We want to make QtWebKit release available to anyone using Qt, as a source package to install into your existing Qt installation. QtWebKit 2.0 is going to work with Qt 4.6 and 4.7. We will continue to ship QtWebKit in the src/3rdparty/webkit directory in Qt releases, too. It will simply contain the latest stable release. Inside of Qt this will be covered by commercial support.

In the near future we are going to create the release branch and aim for a final 2.0 release in May. I’m going to post future updates about the releasing and branching to our development mailing list webkit-qt@lists.webkit.org.


  
Подробнее | Разместил: Planet KDE | Дата: 03.03.2010 | Прочитано: 493 | Комментарии

Robert Riemann (saLOUt): Awesome Klipper Workflow

System & Utilities

Copy your clipboard to the pastebin

Klipper Pastie.org Menu When you are a power IRC user, you might know the problem. You cannot copy the whole source code, error message or log file etc. directly in the IRC channel. You need a pastebin. I like http://pastie.org really much. It has a clean interface and supports highlighting for many languages. But how to copy the text to the pastebin in a handy and short way?

Do the following to copy the clipboard content to the pastebin by a simple <Ctrl>+<Alt>+<R> (global shortcut to open Klipper actions) and a click:

  • Copy the file pastie.rb to a folder which is in your $PATH
  • Make the file executable for you
  • Edit the actions of Klipper and add for the .* Regexp (means: no special string) a new action (do not activate automatic).
  • Add the command echo '%s' | pastie.rb, feedback should go to clipboard and set the description to “post as plain text” for instance
  • You can add another command echo '%s' | pastie.rb -f ...read more...

  
Подробнее | Разместил: Planet KDE | Дата: 03.03.2010 | Прочитано: 539 | Комментарии

Jaros

System & Utilities

What's new, based on identica notes:

  • Thoughts on deploying SQLite turned out to be work in progress. Valuable input from our distro friends. A special wiki page has been created. See the last item of this entry Eye-wink
  • KoReport, Kexi's rpt backend has undergone some refactoring to make it more generic.
  • Fix number 1, charts working again in the designer.
  • Working through the huge list of issues krazy has found with the kexi codebase, not glamorous, but necessary!
  • Refactored the report renderers, and given better class name, to make the report library suitable for adoption over all of KOffice.
  • Do you want well working MSAccess to Kexi converter? It's up to you - request it!
  • KOffice now has a suite-wide reporting library! (placed in koffice/libs/koreports/)
  • Kexi switched to "system" SQLite again. We want to play with distros well, but will check SQLite features at compilation to maintain high quality standards.

(brought to you by Adam ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 03.03.2010 | Прочитано: 419 | Комментарии

Cyrille Berger: The difficult choice of removing features

System & Utilities

Adding a new feature is usually considered easy in the open source world, and then it is taken for granted. Removing a feature, on the other hand, it is a different story. It is not about making Krita less useful, au contraire, it is about making the best for our vision. But why remove a feature, they don’t disturb, or take too much space. They still come in the way and clutter, and what is the point of a menu entry, if you are never going to use it ?

Krita is now focused on being a painting application

We have mentioned in our blogs entry (by me in Krita meeting 2010 – day 1 and by Boudewijn Rempt’s blog) on last week-end Krita meeting, that we had now decided for a vision oriented toward painting.

Where does that leave photography ? Well clearly, it is out. And honestly, between Gimp (especially with their work on 2.8) and Digikam, there is not really much room ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 02.03.2010 | Прочитано: 517 | Комментарии

Park Shinjo (peremen): KDE in North Korea

System & Utilities

I just saw an article about North Korean Linux distro, named "


  
Подробнее | Разместил: Planet KDE | Дата: 02.03.2010 | Прочитано: 408 | Комментарии

Markus Slopianka (markuss): In case you love Amarok 1.4 more than Amarok 2.x

System & Utilities

I just stumbled upon it by accident: Clementine, a port of Amarok 1.4 to Qt 4.
Many features of Amarok 1.4 are missing, so don’t expect a full replacement.

Personally, I keep using Juk – probably the most underrated music.

=-=-=-=-=
Powered by Blogilo



  
Подробнее | Разместил: Planet KDE | Дата: 02.03.2010 | Прочитано: 417 | Комментарии

Albert Astals Cid (TSDgeos): Dear lazyweb: Which PS2 game to buy?

System & Utilities I just got hold of a PS2 and all the games i've ever played on a PS2 is "Guitar Hero 3". So i'm looking for suggestions of the "best game ever for the PS2".

  
Подробнее | Разместил: Planet KDE | Дата: 02.03.2010 | Прочитано: 416 | Комментарии

NetSecL 2.6

System & Utilities

NetSecL is a security-focused distro based on Slackware. It includes GrSecurity by default, has tools for security enhancements , freeware for penetration testing , as well as some additions like hardware recognition, MPlayer, Amarok, Qtparted, Gtkam, Krusader, Gslapt, FirewallBuilder, and other tools for multimedia and system management.


  
Подробнее | Разместил: KDE News | Дата: 02.03.2010 | Прочитано: 398 | Комментарии

Marco Martin (notmart): A vertical Plasma

System & Utilities

Two little extra videos linked to the previous post, this is always plasma-netbook and plasma-mobile running on the JAX10 with Moblin, this time with the screen rotated to vertical.

It is a bit of an hack since the device doesn't have an accelerometer and the touchscreen needs to be recalibrate every time the screen rotates, but is neat as a proof of concept, because neither Plasma Netbook or Plasma Mobile were never designed thinking about vertical screens, but in both cases, always keeping in mind we are at early prototype stage, they work quite well.

Something to be noted, fullscreen plasmoids tends to look a bit better on a vertical screen rather than an horizontal one, and our on screen keyboard works already quite well, even tough it'll need to show less keys when in a tiny screen

OGG version OGG version

  
Подробнее | Разместил: Planet KDE | Дата: 02.03.2010 | Прочитано: 437 | Комментарии

Markus Slopianka (markuss): KDE caused a storm

System & Utilities

This weekend central Europe was struck by a storm, but only a few people know the cause for it.

The origin were the SUSE offices in N


  
Подробнее | Разместил: Planet KDE | Дата: 01.03.2010 | Прочитано: 382 | Комментарии

Markus Slopianka (markuss): Markus K.

System & Utilities

(English / Deutsch)

Hi there.

My name is Markus and I’m currently the maintainer of the German K3b translation (I’m also one of the Kdenlive translators, btw). As this blog post is a call to test the German translation, it’s likely of no interest to anybody who doesn’t speak German, hence I continue to write in German (don’t worry, other upcoming posts will be in English).

Deutsch:

In der letzten Nacht habe ich – hoffe ich zumindest –  die letzten Macken in der deutschen


  
Подробнее | Разместил: Planet KDE | Дата: 01.03.2010 | Прочитано: 425 | Комментарии

Kenneth Wimer (kwwii): Sunday night

System & Utilities

Just uploaded a pic to the Lucid wallpaper pool hoping it makes the cut. 


Also, I took a nifty pic of Michael last week. Turned out quite well considering the lighting.




  
Подробнее | Разместил: Planet KDE | Дата: 01.03.2010 | Прочитано: 435 | Комментарии

Boudewijn Rempt (boud): Last Weekend in Krita

System & Utilities

Don't worry -- tomorrow I'll do a Last Week in Krita for krita.org, but it's so long since I last blogged about Krita personally, and besides, I need to think-think before writing down dot story and krita.org story about the Krita sprint. (Short version: it's a blast -- not everyone could come, but we have seven great people and me in one room and working together and having fun and being productive.)

So... Cyrille has already let the cat out of the bag: Peter Sikking joined us this sprint to help us define a clear vision -- and stayed on afterwards to help us with our various and manifold usability and interaction problems. I think most people in the libre graphics world will know Peter from his work on the Gimp and OpenPrinting.

Well, our vision session wasn't characterized by any real friction, but it still took many hours. In the end we arrived at a real and coherent vision. Cyrille already blogged it, but it's still worthwhile ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 01.03.2010 | Прочитано: 520 | Комментарии

Celeste Paul (seele): Using Tabs in the Taskbar: Improving Desktop-Application Integration, Visual Hierarchy, and Usability in KDE

System & Utilities

A few weeks ago I spent some time thinking about one of the issues I am becoming increasingly concerned about as we focus more on the KDE Desktop and less on KDE applications: the growing separation between the Desktop and the application windows in the environment. As Plasma becomes more and more sophisticated, the gap between the Desktop and the environment grows. The two pieces do not look the same, do not behave same, do not provide the same types of interactions, and user interface design conventions are diverging. The Desktop and rest of the application environment are starting to become two separate experiences which is something we should avoid. This is especially a problem as KDE applications begin providing smaller service-based widgets which live on the Desktop.

Tabs are a metaphor used to connect an interactive widget to a layer of content in a user interface. An important feature of the tab design is the lack of a border at the connection of the tab to the content. Unlike buttons which are completely closed and sometimes disconnected from the ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 28.02.2010 | Прочитано: 541 | Комментарии

Ivan

System & Utilities

Lancelot (the menu) was not really designed to run on mobile devices (although it could be used on such devices as a full screen application quite well), but the Lancelot Part applet proved to be a rather good fit.

I wasn’t involved in any mobile-related developments at Tokamak 4 (I had too much to work on krunner and activities) but I found some time to test the KDE/Plasma enabled Jax 10 devices.

Placing a Lancelot Part inside the newspaper activity that showed favourite applications and a search box was a breeze and it worked quite well. Marco did a really good job of adapting the plasma-netbook edition to mobile (touch screen) devices so the Parts applet required no changes at all to fit in the new environment.

Here is an obligatory blurred screenshot:

I’m planning to make a screencast about using Lancelot in Plasma Netbook, but I’m not finding the time. ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 28.02.2010 | Прочитано: 457 | Комментарии

Holger Freyther (zecke): Dealing with Performance Improvements

System & Utilities I hope this post is educational and help the ones among us doing performance optimisations without any kind of measurement. If you do these things without a benchmark you are either a genuis or very likely your application is going to run slower. I'm not going to talk about performance analysis right now but tools like OProfile, callgrind, sysprof and speedprof are very handy utilities. The reason I'm writing this up is that I saw a performance regression in one of my testcase reductions and this is something which I don't appreciate and in general I see a lot of claims about performance tuning but little bit in regard to measurements and this part is very worrying.

For QtWebKit we have the performance repository with utilities, high level tests and something I labeled reductions. In detail we do have the following things:


  1. Macros for benchmarking. I started with the QBENCHMARK macros but they didn't really provide what I needed and changing them turned out to be a task I didn't have time for. I create WEB_BENCHMARK macros ...read more...

  
Подробнее | Разместил: Planet KDE | Дата: 28.02.2010 | Прочитано: 478 | Комментарии

Chani Armitage (Chani): post-tokamak

System & Utilities

it’s over? already?
damn, time flies when you’re having fun…

I spent the last days of tokamak working on the activity UI and homework (ok, so it wasn’t all fun – I’m not sure I really care whether I finish that homework now :P). I also ended up being a human tripod for a while. :) and had a short interview with HR – I’m considering doing an internship over there (unless I get a better offer… *cough*).

The last night, we went out to celebrate – and ohh, what a night. Karaoke and drinking and dancing and drinking… Tip: don’t make towers of shotglasses. they chip easily. >.<

…and oh god, what a hangover the next morning. Trust me, you don’t want to fly with a hangover. >.< I still felt hung over when I finally got home.

Oh, and think I might, maaaybe have figured out a way to do the activity-session stuff I want with the existing XSMP protocol. maaaybe. I need to look into it some more. :)

So all in all, a great week: ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 28.02.2010 | Прочитано: 434 | Комментарии

Ariya Hidayat: (q)palette viewer

System & Utilities

Qt documentation mentions QPalette as the class that contains color groups, Active, Inactive, and Disabled, for each widget state. Knowing the color for many different color roles is important. For example, a style author might want to tweak the colors of each buttons depending on QPalette::Button, QPalette::ButtonText, QPalette::Highlight and likely play with the shades and the saturation. There are probably few different ways to get the RGB values of those colores, here I show one of them: using a small tool that display all the color roles for active, inactive and disabled states:

And here how it looks like on Nokia N900:

The code is in the X2 repository, check the sub-directory widget/palview. A possible exercise for the brave reader: allow the user to choose other color spaces such as HSL or HSV.

Have fun with the colors!


  
Подробнее | Разместил: Planet KDE | Дата: 28.02.2010 | Прочитано: 422 | Комментарии

EC confirms Google antitrust investigation

System & Utilities

By Mark Murphy on Wed, 02/24/10 - 8:41am. As noted last week , two other open source smartphone platforms are Symbian and Meego, the latter a merger of Intel's Moblin and Nokia's Maemo.


  
Подробнее | Разместил: KDE News | Дата: 28.02.2010 | Прочитано: 492 | Комментарии
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