FAQ/Knowledgebase

General When I build Qt I see the following: and it fails to build. Entry number: 23 - I am having problems displaying overlays on Linux with my NVIDIA card. The same code works on windows. I think I have found a bug in Qt. Where can I report it? Who provides consultancy for Qt? Entry number: 20 - How can I have a debug and release build of Qt at the same time? Entry number: 17 - I receive the following error in the Output pane: What's wrong? Compiling a Qt program fails with error messages looking something like this: undefined reference to `_vt.11QPushButton' Entry number: 13 - Setting the DSN for a database directly with setDatabaseName() Entry number: 12 - How can I display rich text in a QTable? How to have custom widgets in a QListView More...	Licensing Do you plan to offer Qt for Windows under the QPL? I want to dual license my software too! That means I can use the Open Source edition for development, right? Can I also get an Open Source version of Qt/Windows 3? What does the Qt commercial edition include that the open source edition does not? Does releasing Qt/Windows under a dual license mean that Trolltech is giving up the development of Qt for Windows? Can I now use Qt for free everywhere? Why have you not released Qt/Windows under the dual licensing license before now? How will the dual licensing of Qt/Windows affect me? Why are you making Qt for Windows available under the GPL with Qt 4? What do you mean by Dual Licensing? More...	Qt Why does QString::indexOf(QRegExp) cause a crash or hang in Qt 4.5? Why does a statically built Qt use the dynamic Visual Studio runtime libraries ? Do I need to deploy those with my application ? Is it possible to set a header and footer when printing a QTextDocument? How can I have a partially transparent pixmap on my toplevel window? What kind of technical support is available for Qt? How can I evaluate Qt? What is Qt? Is there any assistance available with porting from MFC to Qt? What is the difference between a static and a shared build of the Qt library? Moving my application away from MFC, why would I select Qt as the toolkit to move to? More...
Qt Creator What do I need installed on my machine to begin using Qt Creator and/or the Qt SDK? How often will new Qt SDK packages be released? Does Qt Creator support embedded/mobile software development? Can I get technical support for Qt Creator? More...	Qt Extended / Qtopia Qtopia Phone Edition 2.2.0 supports what screen resolutions, pixel depths and color depths? Does Qtopia Phone Edition 2.2.0 support MIDI/MIDlet? Is MIDI supported? In Qtopia Phone Edition 2.2.0 where are the video codecs located? In Qtopia Phone Edition 2.2.0 are there any licencing issues associated with using the audio/video codecs? In Qtopia Phone Edition 2.2.0 which audio and video codecs are supported? In Qtopia Phone Edition 4.x which image codecs are supported? Is there a Web Browser available? How do I open files? (MP3s, MPEGs, etc.) I think I have found a bug in Qt. Where can I report it? More...	Bug Tracker I made a mistake in an issue I reported, or I need to add additional information to an issue. What can I do? I sent a report to qt-bugs@nokia.com, but I cannot find it in Qt Bug Tracker, and I have not heard back from Qt Development Frameworks. What should I do? Can I use Qt Bug Tracker to get technical support for your products? What can I do with a Qt Bug Tracker account? Can I vote for a bug or suggestion? I have an ID for the old task tracker, how can I find this in the Qt Bug Tracker? I have a login to the Qt customer portal. Can I use the same login for the Qt Bug Tracker? I cannot find a bug which has been reported before in the Qt Bug Tracker, why has it not been transferred? How do I vote for a bugfix or a suggestion? What does the task resolution mean? More...
Qt Jambi Can I use Qt Jambi with Eclipse? Is there an open source version of Qt Jambi? Will you make Qt versions for other languages, such as C#, or Perl ? Will support for Jambi be similar to that currently offered for Qt? How can I invoke functions on QObjects from another thread? Why are the slots in the connections passed as strings ? Can I create a Java applet using Jambi so that my application/library can be accessible via a web browser ? Which Java Virtual Machines (JVMs) does Qt Jambi work with? Which version of Qt do I need to use Qt Jambi? Can I use Designer, Assistant or Linguist with Qt Jambi? More...	Qt Repositories and Contribution Will I be required to assign copyright to Nokia? Why should I use Git to access the Qt sources? Why am I required to provide Nokia a license to my contributions? What type of contributions are we looking for? What is the process for contributing to Qt? What have you used to build the Qt contribution infrastructure? What happened to the Qt snapshots? What are the guidelines for Qt contributions? Is the Contribution Agreement only valid for a single contribution or will it cover multiple contributions? I am behind a firewall, can I still use Git? More...

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FAQ/Knowledgebase