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System & Utilities

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DSL connections in Plasma NM

System & Utilities

One of the things I would like to have working well in Plasma NM is DSL support. Unfortunatelly, I do not have easy access to any DSL provider so I cannot test the current support for DSL in Plasma NM. I do not even know if the support really works. I asked if it works in the bug entry about DSL support and only one person has answered saying it works so I assumed it does work.

Last week I was surffing the web and stumbled accross this post in a Brazilian forum (it is Brazilian Portuguese) explaining how to set up a DSL connection in Plasma NM. Basically Plasma NM really works with DSL, which is great, but there is a catch: you need to disable the auto-connect option for the wired connection that uses the same device that the DSL connection uses. Explaining: DSL works over ethernet (more common), wifi, and maybe over other devices. When the device (ethernet) is meant to be used with DSL you must disable the auto-connect feature in the more...

Подробнее | Разместил: Planet KDE | Дата: 05.02.2012 | Прочитано: 738 | Комментарии

Release Party KDE 4.8 in Teresina

System & Utilities

Hello everybody!

Dark picture with Ângela, me, Mara and Francisco ;-)

 We realized the RP of KDE 4.8 on January 27 in Teresina/Brazil! It was a night of pizza, beer and KDE. And look what we did:

 Gifts KDE ;-)

We hope these gifts will spread around the world!

Подробнее | Разместил: Planet KDE | Дата: 05.02.2012 | Прочитано: 897 | Комментарии

PyQt+WebKit experiments part 2: debugging

System & Utilities

(This is part 2 of the PyQt+WebKit experiments series)

In Part 1 I described how to embed WebKit in a PyQt application and how to expose PyQt objects in WebKit and manipulate them with JavaScript.

Even if you are a great JavaScript master, you can’t avoid the occasional typo while writing JavaScript code in your application. This can be quite frustrating with QtWebKit because it likes to stay quiet: it won’t tell you about any error.

Let’s have a look at an example.

First here is, a simple Python script which loads a block of HTML:

import sys

from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4.QtWebKit import *

class Window(QWidget):
def __init__(self):
super(Window, self).__init__()
self.view = QWebView(self)

layout = QVBoxLayout(self)

def main():
app = QApplication(sys.argv)
window = Window()
html = open(sys.argv[1]).read()

if __name__ == "__main__":

And here is “broken.html”, our broken HTML code:

function brokenFunction(arg1, arg2) {
var result;
result = arg1 more...

Подробнее | Разместил: Planet KDE | Дата: 03.02.2012 | Прочитано: 756 | Комментарии

KDE 4.8 Release Party in S

System & Utilities

It happened in São Carlos, on January 27th, the KDE 4.8 Release Party – the second time in this city.

It was time to meet friends, drink some beers, talk about KDE, the life, the universe and everything, and of course, drink more beer. This time I had time to install the new version of KDE on Mageia (thanks mikala!), to allow those who had not seen the new version, could do a test drive.

The rain interfered a little, but attended four brave comrades to celebrate the work of the entire ecosystem of free software that is KDE.

Left to right: Daniel, Rodrigo, Vitor e Filipe

For me, KDE 4.8 release is more special because it is the first time that I have a large contribution of software being distributed with the project. This is the backend for Scilab more...

Подробнее | Разместил: Planet KDE | Дата: 03.02.2012 | Прочитано: 806 | Комментарии

Spark, free-software Linux tablet, to ship in May

System & Utilities

More details are coming about Spark, the free-software Linux tablet, but enthusiasts will have to wait until May before they can get their hands on one.

Подробнее | Разместил: KDE News | Дата: 03.02.2012 | Прочитано: 638 | Комментарии

A better Tagging Widget

System & Utilities

A long long time ago, a very simple tagging widget was implemented. We always though - "Eh! This is temporary. We'll come up with a better one later." But that never happened.

The old widget

There is a lot of code in Nepomuk. However most of it is backend stuff which does absolutely marvelous things behind the scenes - Auto duplicate merging, type checking with respect to the ontologies, caching and lots more. We, however, lack good UIs.

So, if you're a UI designer looking for a challenge, look at Nepomuk. We have a lot of data.

Anyway, enough promotion! Unlike yesterday, I won't be pointing you towards the source (though it isn't that hard to find). I'll just be showcasing some screenshots. You'll get to try out the tagging widget and whatever-is-in-store-for-tomorrow on Friday.

/images/tagging-widget-new.jpeg /images/tagging-widget-new-autocomplete.png

This was originally implemented with a QListView in flow mode with a custom delegate for tags. Getting it to automatically resize was a pain, more...

Подробнее | Разместил: Planet KDE | Дата: 02.02.2012 | Прочитано: 720 | Комментарии

Meet Spark, the a 200 slate packing Linux-based Plasma Active UX

System & Utilities

As we all know, the Kindle Fire's hot , Apple's selling bushels of iPads , and there's plenty of Honeycomb slates out there for you to choose from, but what if you want a tablet free from corporate influence? Enter Spark, a seven-inch slate that comes running the Plasma Active UX, an open-source OS based on Linux kernel, KDE's multi-platform Plasma ... (more)

Подробнее | Разместил: KDE News | Дата: 01.02.2012 | Прочитано: 876 | Комментарии

Nepomuk Tag Manager

System & Utilities

Welcome to Nepomuk Tag Week. Well, not really, since it's not an official thing. I've just been working a lot with tags lately, and this week I'm going to be spamming you with some tag related updates (One for every day of the week, minus Monday)

I thought I'll start with something small - Tag Management.

Sweet and simple

We've been badly needing a UI to allow the users to modify, merge and delete their tags. You could always delete this using the conventional "Add Tag" dialog, but this way you can do batch deletes.

I'm not much of a UI designer so the interface is quite bare. I'm hoping that someone can come up with a beautiful mockup, which I can then implement.

And with this I can close BUG 258323.

Source Code: kde:scratch/vhanda/nepomuktagmanager

Подробнее | Разместил: Planet KDE | Дата: 01.02.2012 | Прочитано: 667 | Комментарии

KDE 4.8 is really really nice! Congrats! Just KMix popup is confusing…

System & Utilities


Today I upgraded to KDE 4.8, thanks to ArchLinux to provide the packages really fast. Globally I’m pretty happy with the move, more polish, more stable, it really shine! So far the only glitch I had was nepomuk resetting where to index (I on purpose disable where my dev environment is) so it started indexing like hell my development directories, freezing my machine at the very first startup. So I’d say congrats to the KDE for such a beautiful release. Nice work!

On the more down side I’m really confused about the new KMix popup when you click on the speaker icon in the systray. I felt confused about it (so were all my colleagues around) :

I have hard time to understand this popup. It seems that moving the slider to the right would decrease the volume (as it goes in direction of the mute button which is anyway against the regular left-to-right == increase for people using the LTR layout) but no *cough* it increases the more...

Подробнее | Разместил: Planet KDE | Дата: 31.01.2012 | Прочитано: 699 | Комментарии

Open source Linux tablet showcases KDE Plasma Active technology

System & Utilities

Members of the KDE Plasma Active community announced an open source tablet platform that runs the mobile-oriented version of KDE's Plasma UI layer on a MeeGo Linux-based "Mer" operating system.

Подробнее | Разместил: KDE News | Дата: 31.01.2012 | Прочитано: 710 | Комментарии

Fast Lossless Color Image Compression

System & Utilities

In the research field of compression, the usual goal is to achieve the best possible compression rate. The best known algorithms, however, are very slow, and sometimes impractical for real-world applications.

When dealing with images, the situation becomes especially worse considering the fact that photo resolutions are ever increasing. Image sizes of 4500×3000 pixels (or more) are not uncommon. Uncompressed, this amounts to 40 megabytes for 24 bits/pixel, and having to wait several seconds for the image to load or save is annoying.

London Bridge (Tower Bridge) : Reflection on the River Thames
Photo byAnirudh Koul at Flickr

JPEG, the de-facto standard for image compression, while still one of the fastest methods available, has one major drawback: it compresses lossy, in other words, whenever the image is saved, some fidelity is lost. For situations where multiple load/save cycles are to be expected, for example in photo manipulation applications, this is inacceptable.

In the recent months, I have been evaluating available lossless image compression algorithms to select one that is fast, but more...

Подробнее | Разместил: Planet KDE | Дата: 30.01.2012 | Прочитано: 909 | Комментарии

New Spark Tablet To Come Loaded With KDE's Active Plasma Interface

System & Utilities

According to Aaron J. Seigo, 'It's the first tablet computer that comes with Plasma Active pre-installed.' The Spark, with its 7" screen, is built around a Cortex A9 with a Mali-400-gpu, 512MB RAM and an SD-card slot.

Подробнее | Разместил: KDE News | Дата: 29.01.2012 | Прочитано: 720 | Комментарии

GRUB2/BURG Integration in KDE

System & Utilities

No, you’re not having a déjà vu, this is my second post about GRUB2/BURG support for KDM which shows up in PlanetKDE. I am sorry to abuse the planet for publicity, but I have seen quite a bit of confusion as to how KDE should be configured in order to interface with GRUB2/BURG and I would like to get some things straight.

What follows is a step-by-step guide describing how to configure KDE in order to automatically select a GRUB2/BURG entry other than the default when rebooting:

Shutdown Dialog

If you are a GRUB2 user skip the BURG instructions and vice versa.

Step 1. Inform GRUB2/BURG that you plan to use this feature:


GRUB2 instructions:

Open /etc/default/grub in the text editor of your preference (as root) and add the following:


In case a GRUB_DEFAULT option already exists, just set it to “saved”.

BURG instructions:

Edit more...

Подробнее | Разместил: Planet KDE | Дата: 29.01.2012 | Прочитано: 949 | Комментарии

Trying to read files from the past…

System & Utilities

In the deeper directories of my storage device I have some files around from the old times, when my general purpose computer was still locked partially by proprietary (operating) systems. Never-the-less e.g. Corel Draw was still worth the lock and the money, I loved that program and what it enabled me to produce.

These products are still around. And are basically binary blobs now for me, the content not readable by the software I use. Blame on that software :) Well, but also the old software, i.e. Corel Draw, and its makers, using a storage format which seems not published and possibly only available by something like a Technology Partner program or similar, meaning lawyers and businessmen, not fun. But those files’ content is mine, and I completely dislike that the format binds me to a certain software.

Searching for FLOSS code that can understand files in Corel Draw’s CDR file format I discovered UniConvertor from the sK1 project and some initial code for LibreOffice, even actively more...

Подробнее | Разместил: Planet KDE | Дата: 28.01.2012 | Прочитано: 747 | Комментарии

Plasma and KDE Applications 4.8 on Kubuntu

System & Utilities

Kubuntu has packages for 4.8 bringing updates to Plasma workspaces and a load of KDE Applications.

To quote a nice user posting on kde-devel

"I upgraded to Ubuntu's Precise Alpha 1 a few days ago. After the upgrade completed, I tried out KDE 4.8 RC 2. It worked great until the final release of KDE 4.8 Final. KDE 4.8 Final is even better than the RC!"

or later in the same thread

"KDE 4.8 is rocking for me too.Using the Kubuntu PPA's on Sandy Bridge system and it's just lightning fast to do anything. "

Подробнее | Разместил: Planet KDE | Дата: 27.01.2012 | Прочитано: 670 | Комментарии

KDE 4.8 adds adaptive power management, new windowing tricks

System & Utilities

The KDE community announced version 4.8 of its desktop environment and software bundle for Linux, featuring improved, adaptive power management and new windowing functions.

Подробнее | Разместил: KDE News | Дата: 27.01.2012 | Прочитано: 638 | Комментарии

Plasma active device profiles documentation

System & Utilities

The thing we always stressed out in Plasma Active is how the system is designed to fit a whole device spectrum, even if the first two releases are explicitly about tablet devices (and in the near future this is not likely to change ;)

But how? it's pretty obvious that one user interface doesn't fit all for sure. Some devices, like mobile phones could share let's say the 60% of the QML UI written for the tablet, some other, let's say set top boxes could need something radically different.

The Plasma Active shell is actually something that doesn't provide any user interface at all, but instead provides some basic features in the logic: manages the user Activities and loads the plugins that will provide the actual user interface, assembled like a LEGO to fit the user experience of a particular form factor.

About user interface plugins: the central parts are Containments and Applets, that are familiar from Plasma Desktop, a new one is a package format used to distribute stand alone QML files sets, and a very important one in more...

Подробнее | Разместил: Planet KDE | Дата: 26.01.2012 | Прочитано: 700 | Комментарии

KDE Telepathy 0.3 "Ninja" Released - First Beta!

System & Utilities

Today marks the day of yet another KDE Telepathy release. We're so confident with this third release, that we decided to put the Beta sticker on it. Let this be supported by our recent move to KDE's Extragear.


In the past 3 months since we released KDE Telepathy 0.2, we managed to close over 100 bugs. 102 to be exact. We added stability (if you'll make it crash with normal usage, I'll buy you a beer). We added visual polish. And we added new features too. Here's a list of what's new in 0.3:

  • A completely rewritten and simplified plasmoid applet for controlling your online status
  • Support for MSN over XMPP
  • Dialog for adding accounts was redesigned to show the most favorite IM networks first
  • Multiple file transfers with drag'n'drop support
  • File transfers can be resumed
  • The contact list is now separate, fully self-contained, easily embeddable more...

Подробнее | Разместил: Planet KDE | Дата: 25.01.2012 | Прочитано: 810 | Комментарии

Plasma SVG Viewer Tool

System & Utilities

About a week ago I got this random idea. Though I suppose that's what most of my ideas are (I say this as I have quite a few branches for various projects, at the moment ;)

I thought about creating an SVG viewer for Plasma. It's more like an explorer in the sense that it is similar in kin to the current Plasma tools (plasmaenginexplorer, plasmoidviewer), except this one is meant to show a list of themes and the various SVGz's it supports, as well as what they look like. So of course, bare in mind it's not something every user should use, just like plasmaengineexplorer and friends.

Mind you, it's still a work in progress and I'm not exactly sure where I want to go with this, but I figured it might be useful for somebody who is either constructing themes, or want to browse Plasma's available SVGs easily, especially needed if you are using QML a lot.

And of course the obligatory image of awesomeness in true Plasma fashion, showing our beautiful clocks: more...

Подробнее | Разместил: Planet KDE | Дата: 23.01.2012 | Прочитано: 677 | Комментарии

Plasma NM 0.8.99 (AKA 0.9.0_rc4)

System & Utilities

It has been almost two months since last release so I think it is time to release Plasma NM 0.8.99 (AKA 0.9.0_rc4). By the way this is my 100th post in my blog :-)

MD5Sum: 0b432b74b3b0a8fc16d553d4cfc0076c
SHA1Sum: 18d625a25b90f9591a5cfdabcf77269eb3ba33e0


291786: Do not use null pointer when updating WirelessInterfaceItem.
291798: Show APN string for the APN seleted by the user in Mobile Connection Wizard.
291122: Hide non-Internet APNs in Mobile Connection Wizard.
. Fix security type identification for wifi shared connections.
290715: fix certificate and key filenames with non-ASCII characters.
290684: fix crash when restarting NetworkManager.
. Small translation string changes.
. Add some checks to prevent crashes.
. Do not crash if no security type has been detected.
289856: Increase connection's row a bit.
. Fix password flags handling.
289812: support WPA ad-hoc wifi connections. Also allows to create WPA shared wifi connections.
289072: Ask for secrets more...

Подробнее | Разместил: Planet KDE | Дата: 22.01.2012 | Прочитано: 727 | Комментарии

KchmViewer 6.0

System & Utilities

KchmViewer is a simple CHM files viewer written on Qt / KDE. It can be build as a standalone Qt-based application, or a KDE application.

Подробнее | Разместил: KDE News | Дата: 21.01.2012 | Прочитано: 538 | Комментарии

Release Party NL

System & Utilities

As the developers are slowly wrapping up KDE 4.8, it’s time to sign up to a release party near you. We have to make those release parties at least as big as all the protests against SOPA. We can do better, right? So, Wikipedia should implement a page which only makes it possible to read its content when you are listed to be present at one of the release parties. No kidding.

Ok, that is a bit harsh, but still. Release parties are organised all around the world to celebrate the release of KDE 4.8. You should go to one, most of them are relaxed, friendly and allows you to meet your local developers, contributors or just fellow KDE users.

There is also a Release Party planned in Culemborg, The Netherlands. It’s just south of Utrecht, a beautiful city in the center of the country. In the middle of the region known for the jam-production. The release party won’t have any jam though, we will stick to Pizza, cola, a soccer table, a presentation done by Sebastian Kügler and more...

Подробнее | Разместил: Planet KDE | Дата: 21.01.2012 | Прочитано: 655 | Комментарии

KDE 4.8 release party in Malaga

System & Utilities
If everything goes as expected, KDE will publish a major release on January 25th. Our KDE 4 series keep improving with the 4.8 version shipped with many new features.

After releasing two beta versions and another two candidate releases (check the announcements for further information), the moment to feel a new freedom experience with KDE 4.8 Platform, Workspaces and Applications has come and we want to celebrate it all over the world.

If you are around Malaga, Spain, on Friday Jan 27th, come to our release party and bring your family and friends with you. We will have a great time. Please add yourself to the list (if you are a KDE member) or send me an e-mail, so we can make an accurate reservation in La Garrafa restaurant.

Подробнее | Разместил: Planet KDE | Дата: 19.01.2012 | Прочитано: 648 | Комментарии

Digikam Code Sprint @ Genova + Telepathy KIPI Plugin

System & Utilities

This post was supposed to be published yesterday January 18th 2012, but I’m delaying it of 24 hours in support of SOPA STRIKE

Last weekend the Digikam Code Sprint was held in Genoa (Italy). Yes, I’m not a Digikam developer, but I live in Genoa and this was a very good occasion to implement something that I’ve being planning to implement for a long time: A KIPI Plugin for Telepathy. So before saying anything else, here is the mandatory screenshot:

Telepathy KIPI Plugin

Telepathy KIPI Plugin

Thanks to this plugin, you will be able to send your pictures and albums from digikam, showfoto and any other application using KIPI plugins. Most of all I wanted this feature in KSnapshot, and yes this is now possible.

This is something I already implemented in the past [1] but I must admit that having all the contacts in a menu was a bad idea, so I gave up at the time… So this time more...

Подробнее | Разместил: Planet KDE | Дата: 19.01.2012 | Прочитано: 658 | Комментарии

Some news, and improvements in inhibition

System & Utilities

Hello everyone,

I am at at the moment, where I am delivering two talks, about Qt and Multithreading, and Social applications with Telepathy. The first one was yesterday, and I was very pleased by the feedback I received – thanks to all of you who attended, and if you couldn’t make it, videos will be up soon. The conference is being streamed live, so you’re still in time to follow me on Friday.

Besides that, I wanted to blog about some improvements towards flawless power management inhibition. A GCI student, George Stephanos, took the task of testing and fixing inhibition in 4.8: the results were two bugs fixed, and dragon player being able to successfully prevent any power management action. But it does not stop here: yesterday I also added inhibition support in Okular – if you are giving a presentation with it, you don’t have to worry about your screen or your system going down anymore.

Of course this doesn’t end here: the quest for making the more...

Подробнее | Разместил: Planet KDE | Дата: 18.01.2012 | Прочитано: 695 | Комментарии

MSN+XMPP in KDE Telepathy

System & Utilities

As Xavier already wrote on his blog,

Microsoft announced that they had added XMPP to their Windows Live APIs. Microsoft announced that they had added XMPP to their Windows Live APIs. That means that any Jabber client could connect to MSN using our favorite open IM protocol! No more closed protocol to reverse-engineer.

Since Gabble now supports it, I just had to add a little bit of magic to support the Messenger OAuth2 authentication in KDE-Telepathy Auth Handler and add a profile to the Account Manager. Microsoft implementation still have some problems (you cannot add/authorize new contact, yahoo contacts are not shown, etc.), therefore by default the “old” method will be used, but we think that it is important that people starts using it, therefore starting from KDE Telepathy 0.3 (that will be released the 25th of January) you will be able to use XMPP protocol with your MSN account.

It is important to notice that you can have just one MSN-XMPP account at the moment, so here is how more...

Подробнее | Разместил: Planet KDE | Дата: 17.01.2012 | Прочитано: 588 | Комментарии


System & Utilities

A default installation of a distribution using GNOME 3 can be a pain to use, but thanks to available extensions, you can make your GNOME 3 installation a little bit more fun to use, or at least closer to the type of desktop environment you are used to.

Подробнее | Разместил: KDE News | Дата: 16.01.2012 | Прочитано: 557 | Комментарии


System & Utilities

There are several menu styles to choose from in the K Desktop Environment, but my favorite is the Takeoff Launcher, which is why I consider it one of 2 cool reasons to use the K Desktop Environment.

Подробнее | Разместил: KDE News | Дата: 16.01.2012 | Прочитано: 567 | Комментарии

Skrooge 1.2.0 released

System & Utilities

The Skrooge team is pleased to announce the release 1.2.0 of its popular personal finances management application

New Features

  • In the Search & Process plugin, values for categories, payees... can be new values
  • Import & Export of non local files (example: http://myserver/document.qif)
  • The "Shares & Indexes" widget is renamed to "Quotes"
  • Possibility to select all available Units (Objects, Currencies etc.) in the Quotes widget
  • Percentage modes in reports
  • "Incomes & Expenditures" widget is clickable : clicking on the link takes you to the corresponding operations
  • Units can be highlighted to quicky identify the most important ones
  • Categories can be highlighted to quicky identify the most important ones
  • Addition of a "Show/Hide" menu in the scheduled operations plugin, allowing to filter out those with no more payments expected
  • Addition of a "Show/Hide" menu in the operations tab, replacing the previous behaviour (combobox for accounts + checkbox for checked operations)

Bugfix more...

Подробнее | Разместил: Planet KDE | Дата: 16.01.2012 | Прочитано: 589 | Комментарии

Using GnuTLS with QTcpSocket

System & Utilities

It's been quite a while since I last wrote a blog post, but it's not because I haven't been coding, in fact quite the opposite. The Qt opengov project is finally underway and I've been doing quite a lot of work on the various SSL classes. I'm now an official Qt approver, so as you can see the process of getting non-nokia developers the ability to commit to Qt is working.

In Qt 4.x and currently in Qt5 even though the various QSsl classes provide an abstraction from the underlying SSL implementation, there is only one backend and it uses openssl. I recently made a change that means we can add new backends during the Qt5 life time by separating the concepts of SSL support from the availability of SSL - of course this doesn't change anything if openssl is the only game in town.

Over the last couple of weekends, I've been investigating GnuTLS as a
potential implementation that could form the basis of a second backend. I started with the easy part - handling X.509 certificates, and more...

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