Qt4-preview-feedback Archive, February 2008
Two problems
Message 1 in thread
Hi,
I would like to signal two (I think completely not correlated) problems I
encountered by testing Qt 4.4:
1) I'm specifically interested in the new multimedia framework, so I looked
at the corresponding examples and demos. I had no problems with qt
4.4.0-snapshot-20071228, but the same was not true using qt
4.4.0-snapshot-20080209: I can compile libraries and examples without
errors, but, when I start the musicplayer example or the mediaplayer demo,
nothing happens. I think the problem is in the fact that the backend is not
correctly installed, but I'm not sure.
2) I developed an application for data analysis using the QMdiArea and
QMdiSubWindow classes, and embedding inside the sub-windows some specialized
widgets to plot 1-D, 2-D and 3-D data (the last one by means of QwtPlot3d,
i.e. OpenGL). With Qt 4.3.3 everything is fine, but with Qt 4.4 (all the
snapshots I tested) the content of the GL widget remains on the top when I
resized the other sub-windows! The mouse input is handled correctly by the
widget which has the focus, so it seems that the OpenGL widget is not told
to refresh when it is covered, and its contents remains "freezed" on the top
of the screen. I would like to know if this is a bug you can correct, or how
I can change my code to correct this behavior.
I work with Visual Studio 2005 under Windows Vista.
Thank you very much for your attention.
Massimo
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