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Behavioral changes in QIODevice in Qt 4.2

Published Monday September 11th, 2006 | Comments Off on Behavioral changes in QIODevice in Qt 4.2
Posted in KDE, Qt

Some people think QFile in Qt 4 is slow[*]. Compared to Qt 3, the noticable difference lies in QIODevice::getChar(), and to some extent, QIODevice::putChar(). But there’s good news: With Qt 4.2, we’ve managed to improve QIODevice’s performance by 4-5x when reading small blocks at a time, especially so for getChar() :-). So something has changed […]

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Lorn Potter

Invitation to Trolltech’s DevDays 2006

Published Wednesday September 6th, 2006 | Comments Off on Invitation to Trolltech’s DevDays 2006
Posted in KDE, Qt, Qtopia

Trolltech is inviting free software and open source developers to the annual Developer Day Conference[1]. One of the talks in the San Jose, CA venue is by Dr. Bjarne Stroustrup, designer and original implementer of C++. There will be talks ranging from 3D Graphics Development with Qt and OpenGL to demonstrations of the Qtopia Greenphone. […]

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Lorn Potter

crikey!

Published Monday September 4th, 2006 | Comments Off on crikey!
Posted in KDE, Qt

I have been in Australia for 3 years. My parents are visiting for a few weeks. and wouldn’t you know it… the day before we had planned to visit Beerwah (Australia Zoo), Steve Irwin dies. Needless to say, the Zoo won’t be open, and it wouldn’t be a good place to be anyway, after yesterdays […]

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Eskil Abrahamsen Blomfeldt

Second Qt Jambi Technology Preview

Published Thursday August 31st, 2006 | Comments Off on Second Qt Jambi Technology Preview
Posted in KDE, Qt

After doing some last minutes repairs the night before, we successfully launched the second technology preview of Qt Jambi (Qt for Java) yesterday. We’ve fixed a few bugs in this one, added some flexibility to the Eclipse plugin and Qt Jambi in general, and tried to iron out some bumps in the API. Deployment One […]

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4 million items, is it really possible?

Published Wednesday August 30th, 2006 | 1 Comment on 4 million items, is it really possible?
Posted in Graphics Items, Graphics View, KDE, Labs, Qt

Someone asked me if it was truly possible to do 4 million items in real time using Graphics View. I challenge you to see for yourselves. Download one of the latest snapshots for Qt 4.2 (one with the 40000 Chips demo in it) – and apply this patch to increase the number of items. It’s […]

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Maybe it’s just too simple

Published Saturday August 26th, 2006 | Comments Off on Maybe it’s just too simple
Posted in Graphics Items, Graphics View, KDE, Labs, Qt

I’ve did some web crawling on Graphics View [keywords graphicsview, qgraphicsview, qgraphicsscene, “graphics view”…], trying to get a feel for what projects out there are poking into Qt 4.2’s snapshots, and starting to use our favorite canvas framework for real-life apps. I was positively surprised. Try it out :-). People are discussing the frame work […]

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Lorn Potter

summary of LW 2006

Published Thursday August 17th, 2006 | Comments Off on summary of LW 2006
Posted in KDE, Qt, Qtopia

tired. hungry. my legs hurt. my voice hurts. still jet lagged. Had some great food while here in San Fran. Especially liked Blondies pizza on Powel st! Trolltech had a great sucess with Qtopia and Greenphone. Many people showing more interest in Qtopia than Qt! There’s quite the excitement about the Greenphone.

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Glucose and graphics

Published Tuesday August 15th, 2006 | Comments Off on Glucose and graphics
Posted in Aggregated

Today I pushed a new acceleration architecture for Xorg. Called Glucose, it uses OpenGL to accelerate X. What happens there is that Glucose hooks into the initialisation code during the graphics card setup and dispatches the X rendering calls through the same codepaths that XGL uses. The email describing it and the some reasons for […]

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Lorn Potter

Greenphone

Published Tuesday August 15th, 2006 | Comments Off on Greenphone
Posted in KDE, Qt, Qtopia

Well, by now you might have heard about Trolltech’s Greenphone I am quite excited about it, as it brings in a new world for Qtopia Phone development. It’s metallic green, and light. I have been using it for the past week or so, and I must say, I like the hardware. Nice, big screen – […]

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