Trolltech Showcases Key Technologies with Qt 4 Technical Preview

7/9/2004 - Trolltech, a leader in cross-platform development frameworks, announced the first Qt 4 Technical Preview. Qt 4, the next major release of the popular cross-platform C++ application framework, is scheduled for final release in late Q1, 2005.

"Qt 4 will be a significant step in the evolution of Qt software, making it much easier for developers to create elegant, cross-platform applications," said Matthias Ettrich, director of software tools development at Trolltech."We are previewing some key technologies in order to provide our customers and the open source community with an opportunity to give early feedback."

The Key Technologies
The five new technologies, codenamed Arthur, Scribe, Interview, Tulip, and Mainwindow, that are being incorporated into the next major version of Qt 4.0. The technologies are:

Compatibility with Qt 3:
In order to minimize the work to migrate to Qt 4, Trolltech will provide comprehensive porting documents, tools and libraries. Most importantly, Qt 4 will provide an extension library that applications based on Qt 3 can link against to use obsolete classes. Using a separate library allows us to provide more compatibility than ever before, without bloating the Qt library with redundant functionality. This also means that developers can gradually begin to take advantage of Qt 4 features while continuing to use familiar Qt 3 functionality.

The first Qt 4 Technology Preview is licensed under a non-commercial, free of charge license. It can be downloaded from the Trolltech Website at The first Qt 4 beta release, and all subsequent Qt 4 releases will be licensed under Trolltech's standard dual-licensing model.

Depending on the feedback from this Technology Preview, our goal is to provide a second Qt 4 Technology Preview in Q3 2004, enter the beta phase in Q4 2004, and release the final Qt 4 in late Q1 2005.

About Qt
Qt is a complete C++ application development framework, which includes a class library and tools for cross-platform development and internationalization. The Qt API and tools are consistent across all supported platforms, enabling platform independent application development and deployment.

About Trolltech
Trolltech® is a world leader in delivering tools, components, and libraries for C++ developers across all major operating systems. Trolltech products constitute a leading open source application development framework and are an integral part of the Linux desktop. Trolltech also develops innovative UI platforms that enable key players to adopt Linux for mobile devices.

Trolltech creates two product lines: Qt® and Qtopia®. Qt is a complete C++ application development framework, which includes a class library and tools for cross-platform development and internationalization. Qtopia is the first comprehensive application platform built for embedded Linux, and is used on numerous Linux-based PDAs and mobile phones.

Trolltech is a second generation open source company with a dual licensing business model and provides development software to some of the largest companies in the world including Intel, IBM, Motorola, and Sharp, among thousands more. Trolltech is headquartered in Oslo, Norway, with offices in Brisbane, Australia, and Palo Alto, California. More about Trolltech can be found at

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