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System & Utilities

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Chakra Linux 2012.04

System & Utilities

Chakra Linux is a Linux distribution that combines the simplicity of Arch Linux with KDE.


  
Подробнее | Разместил: KDE News | Дата: 21.04.2012 | Прочитано: 928 | Комментарии

BKO: Components

System & Utilities

This is the fourth post in my blog series: bugs.kde.org for developers.

Yesterday we looked at how to search in bko if there is useful information in it. Today we start adding the useful information: components. Now again I assume you will say that you know everything about components, but I have assigned bugs to so many products with too few components, that I decided components deserve an own post in this series.

Components can be used to group your bugs. You can use any grouping which might make sense to you. You could add components for the parts exposed to the user interface, components for implemented concepts (e.g. a protocol) or components for specific parts of the code base. My recommendation is to remember that the bugtracker is there to help you and that means you should use what makes sense to you and not what might make sense to users. Please don’t expect that users or triagers will find the right component – setting the component is something the developers have to ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 20.04.2012 | Прочитано: 954 | Комментарии

Going to LAkademy 2012

System & Utilities

I'll be attending LAkademy, the first KDE Latinamerica summit for KDE developers, old and new.

Unfortunately, I'll be the only one from Argentina. I wasn't able to convince any more people to sign up. It is on my TODO list for next year.

During the summit I'll be working on the long list of bugs of KMyMoney reports. Also, I can help with KDE Telepathy. I'm not part of that project, but I have been involved in developing a similar application for MeeGo that was never released, and know a bit or two about Telepathy nuances, which might come handy.


  
Подробнее | Разместил: Planet KDE | Дата: 20.04.2012 | Прочитано: 830 | Комментарии

LFSR & arduino: a subset in hardware

System & Utilities

The Linear Feedback Shift Register might appear to be "random" but it is of course far from it. The first two words should make you suspicious of how random things are. Version 1 does the actual production on the arduino chip. I'm hoping to break out the logic onto the breadboard for a future version. The arduino would then be relegated to a provider of voltage and ground.



Since it is all rather predictable, it would be fun to have a second arduino with light sensors on it be able to come close to the existing model and then sync its own LFSR and output to the LFSR.


  
Подробнее | Разместил: Planet KDE | Дата: 19.04.2012 | Прочитано: 978 | Комментарии

Porting of KDE games from deprecated libraries

System & Utilities

There has been a lot of discussion in the Kdegames mailing list regarding the porting of the games from deprecated libraries like KGameRenderer and KGameTheme to new rendering methods and Graphics stack. This is a very good opportunity for new contributors to start contributing to Kdegames. Although some of the ports might be a bit difficult but there are easy ones too once the code of a game specially the rendering portion of the code is understood. The port table is available here http://community.kde.org/KDE_Games/Porting. A basic understanding of Qt/C++ would be required, but the junior jobs should get one up to speed for tackling the ports.

For people who want to start contributing to Kdegames , it is advisable to go through the following steps in order

1. Subscribe to the Kde-games-devel mailing list (https://mail.kde.org/mailman/listinfo/kde-games-devel) . For those who do not know what it is, a mailing list is basically a kind of a forum where people post their queries or doubts or submit their patches. When they do that, all ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 18.04.2012 | Прочитано: 914 | Комментарии

Amarok's rewritten iPod plugin: testers needed!

System & Utilities

Little introduction first: I'm a student of theoretical computer science from Prague/Czech Republic and I've started contributing to Amarok last autumn by fixing some of its (mainly iPod-related) bugs.

It turned out that maintaining the iPod collection plug-in was rather painful due to its complexity that accumulated over time - and I got motivated to rewrite it from scratch by Amarok's Bart Cerneels. The effort is now over. Welcome the all-new iPod collection plug-in! (supports iPads and iPhones, too!)
Mandatory screen-shot of the rewritten iPod collection plug-in
What does the rewrite bring? Well, working playlists, transcoding, multiple concurrent transfers, working stale & orphaned tracks detection and elimination plus many more enhancements and bug-fixes. Thanks to the rewrite, some bugs in USB Mass Storage collection got fixed, too.

You'll get all these goodies with Amarok 2.6, which is slated for release in a month or (rather) two. But if you're ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 17.04.2012 | Прочитано: 907 | Комментарии

MSFT Office, OpenOffice.org, LibreOffice.org & now Calligra-Suite.org

System & Utilities

In the wake of what has been claimed to be leaked screenshots of Microsoft Office 2014 and the continued growth of both OpenOffice and its LibreOffice fork, there is still more choice out there in the "productivity suite" applications market if you go looking for it.


  
Подробнее | Разместил: KDE News | Дата: 16.04.2012 | Прочитано: 1113 | Комментарии

QML Theming/Styling

System & Utilities

Intro


As I mentioned in my last post, I and my team in INdT are researching on how to improve the Styling  new way of creating styled QML widgets components (Button, Sliders, ComboBox, etc.). We've been involved for such a long time in the development of Qt Components for the Harmattan, and me personally worked on the Plasma Components widget set.

We also did a some big desktop and mobile applications (such as Snowshoe and PagSeguro NFC Payment) which required us to create lots of custom widgets. Obviously there's a lot of redundant code between the applications that could belong to a common code base.

Besides the existence of the Qt Components, the styling of widgets is an issue it doesn't solves as well. Nowadays if you want a new style, you'll have to create a set of QML components from scratch or to base on an existing widget set, which would increase the development and code fragmentation. One way to style your widgets is to rely on the old and ...read more...

  
Подробнее | Разместил: Planet KDE | Дата: 16.04.2012 | Прочитано: 1145 | Комментарии

Bug #283105

System & Utilities

Bug #283105 is the famous "networkmanagement's kded module crashes when opening kwallet". Today I finally reproduced it but there is no solution yet. I will need to refactor Plasma NM's secret agent to avoid the crash and other potential problems I have also found. I do not know yet when the problem will be fixed, the secret agent is a delicate part of Plasma NM, so any precaution is worth when changing something in there.


  
Подробнее | Разместил: Planet KDE | Дата: 15.04.2012 | Прочитано: 455 | Комментарии

making kubuntu use less memory

System & Utilities

i run kubuntu on a 1gb ram netbook, and optimizing KDE memory usage is cruicial for me because i use this machine for development (kdevelop is a large beast, and i want to have chromium and gcc running as well). I'd like to share a few tips to achieve that.

1. sudo apt-get install kubuntu-low-fat-settings
2. if you don't need bluetooth: sudo apt-get purge bluez* bluedevil
3. sudo apt-get purge akonadi-backend-mysql mysql* (this will automatically install sqlite backend)
4. if you don't use activities: sudo rm /usr/share/kde4/services/kactivitymanagerd.desktop (i filled bug 298088 with request to make kactivitymanagerd ran only when really needed)
5. if you don't need akonadi: sudo rm /usr/share/autostart/akonaditray.desktop
6. if you don't use nepomuk (i.e. disabled it in systemsettings): sudo rm /usr/share/autostart/nepomukserver.desktop
7. sudo rm /usr/share/autostart/kaddressbookmigrator.desktop
8. if you don't use printer often: sudo rm /usr/share/autostart/printer-applet.desktop (you can still start this applet manually by issuing 'printer-applet' command in konsole)
9. sudo mv /etc/rc5.d/S50saned /etc/rc5.d/K50saned

(hint by Dave: instead of removing .desktop files, just do 'cp FILE ~/.kde/share/autostart && echo Hidden=true >> ~/.kde/share/autostart/FILE)

Currently my ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 14.04.2012 | Прочитано: 539 | Комментарии

[TORRENT] Slackel KDE-4.8.2 x64

System & Utilities

Slackel is a Linux distribution based on Slackware's "current" branch, with the goal of integrating the latest KDE desktop, the Calligra office suite and some custom artwork into separate live and installation DVD images.


  
Подробнее | Разместил: KDE News | Дата: 13.04.2012 | Прочитано: 693 | Комментарии

Calligra 2.4.0

System & Utilities

Calligra is an integrated suite of applications that cover office, creative, and management needs.


  
Подробнее | Разместил: KDE News | Дата: 13.04.2012 | Прочитано: 723 | Комментарии

Signals and Slots in Qt5

System & Utilities

Qt5 alpha has been released. One of the features which I have been working on is a new syntax for signals and slot. This blog entry will present it.

Previous syntax

Here is how you would connect a signal to a slot:


connect(sender, SIGNAL(valueChanged(QString,QString)),
receiver, SLOT(updateValue(QString)) );

What really happens behind the scenes is that the SIGNAL and SLOT macros will convert their argument to a string. Then QObject::connect() will compare those strings with the introspection data collected by the moc tool.

What's the problem with this syntax?

While working fine in general, we can identify some issues:

  • No compile time check: All the checks are done at run-time by parsing the strings. That means if you do a typo in the name of the signal or the slot, it will compile but the connection will not be made, and you will only notice a warning in the standard output.
  • Since it operates on the strings, the type names of the slot must match exactly the ones of the signal. And they ...read more...

  
Подробнее | Разместил: Planet KDE | Дата: 13.04.2012 | Прочитано: 700 | Комментарии

history making first release of

System & Utilities

After about 2 years of development and 1½ year since we officially formed the Calligra project I'm happy that Calligra 2.4 is being released later today.

In my vision Calligra becomes a ground breaking fresh alternative to the established free and proprietary players. Calligra should create history and revolutionize it. We are not there yet, but we have great plans and are very much still evolving.

We don't believe that applications have to chose between being powerful and complex, or being dumbded down to make them easy to use. In the Calligra Words team we have this crede "powerfeatures made easy" and we are committed to making this come true by working hard on the usability as well as adding powerfeatures. And we don't want to just add configuration options. We want to create our interfaces in a way that puts all the power at your fingertips in the most intuitive way.

We know we are not there yet. As I said it's early days yet, but we have already made some ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 11.04.2012 | Прочитано: 634 | Комментарии

REST & Filesystems: A homage to plan9

System & Utilities

In my previous post I mentioned, among other things, two things I want to hack together: An improved REST API for libferris, and KDE KIO integration for libferris. It occurred to me that these two, while able to be performed as distinct tasks, are better done as one. Or rather that the later can be coded to rely on the first being available. With a REST API and a Web server, a virtual filesystem inherits one of the great properties plan9 - filesystems as separate processes that can run on another machine and access data on a third machine.

Consider wanting to get at information from a PostgreSQL table from a mobile phone. The REST API might be on the "webserver" machine, while the database runs on dbserver. The phone talks to webserver sending GET/POST and receiving XML/JSON depending on it's preference. Using libferris, webserver talks to dbserver (by mounting it) and queries and returns results back to the phone.

This also lets the phone upload images via the REST API. Instead of setting up software on ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 10.04.2012 | Прочитано: 717 | Комментарии

Plasma NM 0.9.0.1

System & Utilities

Well, I still have not fixed the infamous "networkmanagement's kded module crashes when opening kwallet" bug I mentioned in the last release. The main reason for this release is to fix the translations that were being taken from master branch instead of nm09 branch.

Plasma NM 0.9.0.1
SHA256Sum: ed5aaff8ed7d52f2541eca27f5bf15792cd97f8e7f8014c0fe9ab8e73f2cab2f


Changelog:

. fix translations.
297309: Return Gsm and Cdma providers lists case-insensitively sorted in Mobile Connection Wizard.
296740: Do not send the interfaceRemoved signal if NM stopped or crashed. If it has crashed we can crash too if we send the interfaceRemoved signal here.
. Check if libnm-util and libnm-glib are installed before compiling.
. Also import/export routes when importing/exporting VPN connections.
292477: Add to kcm module, in "Other" tab, option to select if Plasma NM should ask for GSM Pin on modem detection or when activating a gsm connection. The last one is what most users want but some modems do not work with this mode.

The following languages have more than 80% of strings translated:

ca ...read more...

  
Подробнее | Разместил: Planet KDE | Дата: 09.04.2012 | Прочитано: 646 | Комментарии

establishment threatening

System & Utilities

. . . . . . . . . . . . .


  
Подробнее | Разместил: Planet KDE | Дата: 08.04.2012 | Прочитано: 534 | Комментарии

You are about to meet the

System & Utilities

. . . . . . . . . . . . . . .


  
Подробнее | Разместил: Planet KDE | Дата: 07.04.2012 | Прочитано: 619 | Комментарии

Writing a Prezi clone with HTML5, SVG, and Javascript

System & Utilities

The idea

The other day, I took it upon myself to write a browser-based Prezi-like app without using flash. Condition: It should run purely client-side.

It was also an experiment in evaluating whether the current APIs available in modern browsers are enough to handle the task. What follows is an account of what works, what doesn’t, and what could be done better.

SVG vs Canvas

When you’re building a rich graphics-intensive app like Prezi, you usually have two ways of rendering content: SVG and Canvas.

1. SVG provides a neat DOM that can be manipulated with existing DOM handling javascript libraries, such as jQuery. Canvas, on the other hand, is just a bitmap buffer. This means that you have to program your own DOM-like scene graph if you wish to use Canvas for handling presentation elements. Libraries for this already exist – most notably, fabric.js, but none are as convenient to use as a real DOM. SVG wins here.

2. Canvas is just a dumb bitmap buffer. Animating it is ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 06.04.2012 | Прочитано: 870 | Комментарии

Kde SC 4.8.2 Is Now Available for Download

System & Utilities

"The development team of the KDE Project have unleashed earlier today, April 4th, the second maintenance release for the KDE Software Compilation 4.8 environment.


  
Подробнее | Разместил: KDE News | Дата: 05.04.2012 | Прочитано: 608 | Комментарии

colord-kde 0.2 released!

System & Utilities

Today is the 0.2 release day!

I’m very excited about the overall feedback that I received from the 0.1 release, a fix here, a bug report there, and we finally have a real solid release. System Settings bug was fixed, monitor plug’n'play was improved, the profiles selection bellow the device item doesn’t flicker anymore, most (if not all) Krazy issues where fixed and a few new features where added.

The coolest new feature is calibrate button, as I explained on the first post we won’t have a KDE interface so soon as the code has to be made share able, so it’s not the best solution, but the button I added will be enabled only if gcm-calibrate is available:

Calibrate button

As you can see beside the obvious GTK style change, is that it actually integrates pretty well as the dialog sets System Settings as it’s parent:


  
Подробнее | Разместил: Planet KDE | Дата: 04.04.2012 | Прочитано: 728 | Комментарии

libdebconf-kde 0.2 released!

System & Utilities

This release is mostly to help packagers, I delayed it a lot because of the bug 255935, it turned out that as kpackagekit-smarticon and apper-sentinel crashed when exiting showing the debconf stack I thought the problem was actually in libdebconf, so today I decided to dig some old bugs and fixed this crash in Apper (hence the bug).

This new release include some nice changes made by Modestas Vainius which among other things adds support for FIFO pipes on the debconf-helper command line and implement X_PING support in it.

So I added a few Krazy fixes and we are done as the bug was not on libdebconf-kde.

Enjoy!

And if you didn’t read my last post on the fundraising campaign (thanks a lot for those who already contributed), please take a look it’s almost there :D

http://www.indiegogo.com/project/widget/87790?a=525675


...read more...

  
Подробнее | Разместил: Planet KDE | Дата: 03.04.2012 | Прочитано: 509 | Комментарии

Sawfish 1.9 RC1 Released

System & Utilities

Last Thursday, the Sawfish window manager project announced the availability of 1.8.92. The release brings several new features .


  
Подробнее | Разместил: KDE News | Дата: 03.04.2012 | Прочитано: 693 | Комментарии

Muon Suite 1.3.1 Released

System & Utilities

I am glad to announce the first bugfix release for Muon Suite 1.3. The Muon Suite is a set of package management utilities for Debian-based Linux distributions built on KDE technologies.

The 1.3.1 release fixes several issues with handling foreign-architecture packages, as well as several crashes related to fetching reviews/changelogs/pictures from the internet. Additionally, translations have been updated.

Packages for Kubuntu 11.10 are from the QApt repository, and in the main repositories for Kubuntu 12.04.

Further technical information about the release, including source tarball downloads and a detailed changelog, can be found at the project pages here and here.

Exciting things are happening for 1.4, so stay tuned for some blogs on that in the near future!


...read more...

  
Подробнее | Разместил: Planet KDE | Дата: 02.04.2012 | Прочитано: 902 | Комментарии

Zeitgeist Webrowser in four steps

System & Utilities

Ever have one of those “Wow, that was easy” moments in software development?

Here’s a web browser that uses QZeitgeist to feed and pull history in four steps and around 100 lines of code.

1) Wire up a QWebKitView to send pages into Zeitgeist:


// In constructor
{
m_log = new QZeitgeist::Log(this);
 m_webView = new QWebView(this);
m_webView->load(QUrl(\"http://zeitgeist-project.com\"));
connect(m_webView, SIGNAL(loadFinished(bool)), this, SLOT(logPage()));
}

void MainWindow::logPage()
{
QZeitgeist::DataModel::EventList events;
QZeitgeist::DataModel::Event event;
event.setActor(\"applicaton://zeitgeist-browser-demo.desktop\");
event.setInterpretation(QZeitgeist::Interpretation::Event::ZGAccessEvent);
event.setManifestation(QZeitgeist::Manifestation::Event::ZGUserActivity);

QZeitgeist::DataModel::Subject subject;
subject.setInterpretation(QZeitgeist::Interpretation::Subject::NFOWebsite);
subject.setManifestation(QZeitgeist::Manifestation::Subject::NFORemoteDataObject);
subject.setUri(m_webView->url().toString());
subject.setText(m_webView->title());

event.setSubjects(QZeitgeist::DataModel::SubjectList() << subject); m_log->insertEvents(QZeitgeist::DataModel::EventList() << event);
qDebug() << \"Logged\" << subject.uri();
}

2) Add a view to display your history:

// In constructor
{
QZeitgeist::LogModel *history = new QZeitgeist::LogModel(this);
QZeitgeist::DataModel::Event eventTemplate;
QZeitgeist::DataModel::Subject subjectTemplate;
subjectTemplate.setInterpretation(QZeitgeist::Interpretation::Subject::NFOWebsite);
eventTemplate.setSubjects(QZeitgeist::DataModel::SubjectList() << subjectTemplate); history->setResultType(QZeitgeist::Log::MostRecentSubjects);
history->setEventTemplates(QZeitgeist::DataModel::EventList() << eventTemplate); QDockWidget *historyDock = new QDockWidget(tr(\"History\"), this); addDockWidget(Qt::LeftDockWidgetArea, historyDock); QAbstractItemView *historyView = new QListView(historyDock); historyView->setModel(history);
historyDock->setWidget(historyView);
}

3) Connect the history view to the web view:

// In constructor
{
connect(historyView, SIGNAL(activated(QModelIndex)), this, SLOT(loadHistory(QModelIndex)));
}

void MainWindow::loadHistory(const QModelIndex &idx)
{
m_webView->load(idx.data(QZeitgeist::LogModel::URLRole).toUrl());
}

4) Call it a day:

...read more...

  
Подробнее | Разместил: Planet KDE | Дата: 30.03.2012 | Прочитано: 780 | Комментарии

12.04 Beta 2 Released

System & Utilities

Kubuntu 12.04 LTS Beta 2 is released for testing. Download from the cdimage mirrors or upgrade from 11.10 or upgrade from 10.04 LTS.


  
Подробнее | Разместил: Planet KDE | Дата: 30.03.2012 | Прочитано: 730 | Комментарии

Video calls in KDE-Telepathy

System & Utilities

Well, I think I owed you this one ;) Remember back in 2009 when I was working on KCall as part of the GSoC program? Well, it may have taken 2.5 years more, but I’m now pleased to announce that it’s finally in a ready-to-use state o/ Don’t expect it to be perfect, of course. It still has a long way to go.

Here is the obligatory screenshot. Me on my desktop, calling myself on my laptop :)

Screenshot of ktp-call-ui

The KDE-Telepathy call-ui in action

A little bit of history

When my GSoC finished in 2009, there were 2 main problems with KCall. The first one was that the bits of the telepathy specification for doing calls (i.e. the “StreamedMedia” channel type) were problematic, not to mention that the API of the telepathy-farsight library, which was the only way to use StreamedMedia, was also weird and it took me too many tries to finally understand it ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 29.03.2012 | Прочитано: 695 | Комментарии

Working in the open again

System & Utilities

Long time since my last post (it’s sad to realize how often I start posts writing this).
Since last year’s Qt Contributors’ Summit, our team at INdT worked on a closed source project – the main reason of the low activity here. At least, I could write some posts for the Qt Labs Blog Brazil, most of them introducing basic concepts about Qt programming and the Qt ecossystem (buzzword++).
The good part is: This project we were working on was developed using Qt and QML for a desktop application. Besides promoting Qt among Brazilian developers and companies, this project helped us to think about improvements for future releases of QtQuick aiming desktop applications. I am looking forward to see a release of this product soon! (However, when it is going to happen is a client decision).

Then, after the end of this project, I finally managed to contribute to Qt5! :-)

Also, in the end of the last year some coworkers started a kind of pet project: ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 27.03.2012 | Прочитано: 664 | Комментарии

Calligra Active on Android

System & Utilities

As I wrote in my previous blog post, I've been doing work on getting Calligra working on Android. My first attempts of this used Calligra Mobile, our QWidget based mobile UI originally written for the Nokia N900. One big problem with this is that the scrolling speed when running on android was horribly slow. I think I got maybe 1 or 2 frames per second, and that on fairly powerful hardware. Early on in the development process of the calligra based document viewer for the Nokia N9 we were having similar performance problems, caused by wrapping our QWidget based canvasses in a QGraphicsProxyWidget. Now Calligra Mobile itself is completely QWidget based, so it shouldn't have those problems (it works decently on the N900 afterall), but because of the way Qt on Android is implemented there is a similar kind of indirection going on as with QGraphicsProxyWidget, so instead of trying to fix the performance of Calligra Mobile, I decided to instead give one of the other mobile UI's of Calligra a try.

So since my last blog ...read more...


  
Подробнее | Разместил: Planet KDE | Дата: 27.03.2012 | Прочитано: 676 | Комментарии

GSOC: Enhance our workspace experience

System & Utilities

Since so many students have already shown interest in working for KDE during this years Google Summer of Code, with some already having started to send in first drafts of their proposals, I thought I'd a bit of advertising for a specific idea .


  
Подробнее | Разместил: KDE News | Дата: 27.03.2012 | Прочитано: 700 | Комментарии
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