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Archive for October, 2006

Mandriva and Qt4.2 font problems

Yes! I finally managed to solve my font problems with Mandriva and Qt 4.2. What was happening was that font antialiasing was not working for any of the Qt4.2 applications. What was funny was that for Qt4.1.4 everything was (and still is) working fine.

I was trying to find a solution since the very beginning of Qt4.2 public snapshots. At first I thought that this was caused by the fact that Qt4.2 was still unstable but when 4.2.0 came out and the problem persisted, I became worried. I even talked to Trolltech support during DevDays in Munich about the issue, but without any result.

Today I finally managed to get my fonts antialiased in Mandriva. The problem is caused by a configuration file from Mandriva’s fontconfig package, which disables antialiasing for some fonts. I don’t know why, but although it shouldn’t, Qt4.2 triggers one of the sections in the file that disables antialiasing. What is strange is that changing font faces in qtconfig doesn’t solve anything – the section is still triggered,
so the problem might be within Qt or fontconfig.
The workaround is to remove the file (or comment out the section) – it is situated in /etc/fonts/conf.d/ and is called 02-mdk-disable-antialias.conf.

I just sent a bug report to Trolltech about it, let’s see if they can do anything about it.

Finally I can start playing around with a fully working Qt4.2 installation…

Designer Tutorial

Some time ago I created and published a video tutorial for Qt4 Designer. Nothing funky, some small speaking problems, but hopefully next tutorial will be better.

I received a good feedback from people who have seen the tutorial before I published it, so hopefully someone will find my work useful.

You can download the tutorial from my webpage.

Impressions from DevDays 2006

I came back from Munich (Germany) where I attended Trolltech Developer Days and after a week I’d like to describe the trip and my impressions.

One of the main goals of going to that conference was to meet other admins of Unfortunately Johan and Axel couldn’t come, but the rest of (more or less) active admins were there – I went to Munich together with Jacek and Daniel lives in Munich so it was easy for him to come.

The conference took place in Hilton Hotel in Munich and consisted of two days with each day divided into sessions (called “Breakouts”). In each session one could choose from three different lectures on various topics.
I noticed that the biggest effort was put on the model-view framework.

The Trolls themselves were really kind. They were wearing T-shirts with “I’m a Troll” writing on the front side and “Ask me” on the back (see pictures below). You could ask them any question and really expect it to be
answered (although my question remained unanswered :P).

I'm a Troll
Ask me

Advanced Item-Views
The quality of sessions was very high. All the Trolls were speaking fluent and plain English. The lectures included examples (like during the “Advanced Item-Views” session, see the picture on the left) and (at least to me) were easy to understand. Some of the lectures were so popular, that people had problems squeezing into the room, but that’s because the three rooms used for Breakouts had different sizes and obviously Trolls made some errors estimating which course will be the most popular in each session.

As I mentioned before, one of the main goals of attending DevDays was to finally meet other administrators in person. I’ve met Daniel Kish (“theLSB” on QtCentre aka “hatulflezet” on QtForum) and together with Jacek (I’ve
known Jacek for 10 years now) we talked a lot and discussed the future of QtCentre.

Daniel taking part in Froglogic contest Jacek and I

Knut and Daniel We’ve also met Knuth Yrwin, the Qt Community Manager in Trolltech. He’s the person responsible for contact with the community, so I expect more contacts between him and QtCentre team. Knut held a “BOF: Open Source” talk which aimed to give goals to Trolltech on how to more support Free Software.
Unfortunately, only a few people attended (one of them was Karin “kyrah”
). The discussion was live, loud and firm, but unfortunately didn’t lead to some binding statements on the Trolltech side. Let’s see how the situation develops – the Trolls were notified of Open Source
expectations (although I don’t consider myself a person who might speak on behalf of “Open Source”, but surely consider myself a person who might speak on behalf of Qt community) and we’re in contact with Knut, so
hopefully that’s not the end of this story.

Harald Fernengel (Trolltech Release Manager) demonstrating the penalty for not using QTestLib for developing Qt.

Benoit Schillings (Trolltech CTO) conducting the trivia question contest: “Remember, multiple inheritance is a beautiful thing!”

One of API additions planned for Qt 4.3 – QWidget::setWidowIcon().

Eirik Chambe-Eng (Trolltech Co-CEO) welcomes people to the conference.

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