[Qt-interest] QWIDGETSIZE_MAX and widget geometry limits

[Constantin Makshin]

There was a related discussion some time ago:
http://lists.trolltech.com/pipermail/qt-interest/2010-June/024439.html

On Tuesday 06 July 2010 12:08:17 Kustaa Nyholm wrote:
> Hi,
> 
> can I safely assume that any widget lies within in the coordinate space:
> 
> -QWIDGETSIZE_MAX .. QWIDGETSIZE_MAX , -QWIDGETSIZE_MAX .. QWIDGETSIZE_MAX
> 
> or more specifically: I want to create a 'capture all' overlay that will
> trap all the mouse events, so is enough to create a QWidget with geometry:
> 
> (-QWIDGETSIZE_MAX , -QWIDGETSIZE_MAX, 2*QWIDGETSIZE_MAX , 2*QWIDGETSIZE_MAX)
> 
> I understand that logically this is wrong (using 2*QWIDGETSIZE_MAX) but
> seeing that QWIDGETSIZE_MAX sort of tries to define the coordinate size
> this would seem to be likely to work.
> 
> Note that I'm not creating the overlay just to capture events, I also
> want to use it to 'dim' or perhaps blur the widgets behind it.
> 
> Or is there a betterway?
> 
> This in the context embedded Linux but I need to be able to use
> this on desktop too.
> 
> br Kusti