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Lorn Potter

jet lag

Published Thursday March 1st, 2007 | 2 Comments on jet lag
Posted in KDE, Qt, Qtopia

jet lag. I’ve got it. had it for a week now. The reason. FOSDEM in Brussels, and the fact that I live in Brisbane Australia. Why do plane rides suck so much? There’s little or no room, especially since they have installed video+games and the box is usually under the seat right in front of […]

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New classes: QXmlStreamReader and QXmlStreamWriter

Published Wednesday February 28th, 2007 | 6 Comments on New classes: QXmlStreamReader and QXmlStreamWriter
Posted in Qt

Snapshot users have seen them already: with QXmlStreamReader and QXmlStreamWriter, Qt 4.3 will feature two new classes for reading and writing XML. QXmlStreamReader is a faster and more convenient replacement for Qt’s own SAX parser, and in some cases also for applications that would previously use a DOM tree. The basic concept of a stream […]

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Lars Knoll

SSL, proxies and md5 sums

Published Wednesday February 28th, 2007 | 15 Comments on SSL, proxies and md5 sums
Posted in KDE, Qt

As Zack already mentioned in his blog, we had George Staikos visiting us in our Oslo office last week. He, Andreas and myself sat down to hack on some rather big API additions to our networking module. Some of these changes have been visible in the snapshots for a few days now, as the work […]

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Graphics View improvements

Published Tuesday February 27th, 2007 | 21 Comments on Graphics View improvements
Posted in Graphics Items, Graphics View, Labs, Qt

We’re in the process of closing up the features for 4.3, and I’ve had a little run-down of what’s changed in Graphics View. In general, you will notice that the graphics run faster, (especially for complex polygons,) collisions are absolutely precise, the rubberband looks 100x better… I think most of our Graphics View followers will […]

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Eskil Abrahamsen Blomfeldt

Debugging JNI-based applications on Windows

Published Tuesday February 27th, 2007 | Comments Off on Debugging JNI-based applications on Windows
Posted in Qt Jambi

One of the most annoying things about developing Qt Jambi has so far been the Java Virtual Machine’s tendency to intercept exceptions in the native code, thus disabling any mechanism installed in the OS serving to handle these. Instead of your application crashing violently, it outputs a message to the console apologizing intently that such […]

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New Feature: Compiler Errors

Published Monday February 26th, 2007 | Comments Off on New Feature: Compiler Errors
Posted in Qt, Qtopia

Since dynamic_cast doesn’t reliably work between library boundaries, Qt introduced qobject_cast to safely cast between QObject subclasses. There’s just one requirement – the class you want to cast to must contain a Q_OBJECT macro. Without the macro, qobject_cast would fail at runtime, which makes it tedious to debug. Qt 4.3 now includes a compile check […]

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Browsers, performance and interventions

Published Sunday February 25th, 2007 | Comments Off on Browsers, performance and interventions
Posted in Aggregated, WebKit

This week I beat WebKit Qt’s rendering into shape. I rewrote the theming and canvas code. It works so nicely that I’m actually pretty happy with it. The rewrite helped me fix issues with statically positioned elements (which just didn’t work on a scrollview/canvas combination I did before). Due to which my blog finally looks […]

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Introducing Qt Concurrent

Published Friday February 23rd, 2007 | 9 Comments on Introducing Qt Concurrent
Posted in Labs, Qt Concurrent, Threads

As a part of Trolltech Labs, I’m adding the Qt Concurrent project. Qt Concurrent is a high-level threading framework for writing code that automatically scales on multi-core systems. For example, to make thumbnails of a list of images you can do this: QImage scaled(const QImage &image) { return image.scaled(QSize(100, 100)); } … const QList<QImage> images […]

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Lorn Potter

power of emulation

Published Saturday February 17th, 2007 | Comments Off on power of emulation
Posted in KDE, Qt, Qtopia

QVFb is the “emulator” that Qtopia gets developed in. The power in this, is that it constrains your “screen” to specific display sizes, gives you control over what bit depths your display uses, and simulates buttons presses, through the use of a skin. This helps produce applications that are dynamically resizing, look good and actually […]

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