I have written a small application today which aims at viewing UI files from Qt4. Nothing special, but can be very usefull. I based the idea on KUIViewer program which allows the user to view Qt3 UI files (unfortunately it crashes when fed with an UI from Qt4).
The current version of the application is attached in this thread.
You can use it as a standalone app or attach it to your system so that it will be run when you click on a UI file (in such a situation you need to pass the filepath as arguments to the application in the form --file filepath.ui).
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