[Qt-interest] duration of a keypress?

[Arnold Krille]

On Saturday 05 December 2009 17:07:41 Chris G wrote:
> Hello all,
> I need to get the duration of time between a key press and release.
> The problem is that there may be code run in between the two events
> which block the main thread for a long time.  If I just look at the
> time between keyPressEvent and keyReleaseEvent being called, it will
> not be the same as the duration that the key was actually pressed, it
> may be much longer.
> So is there a qt-way to get this information?

There is a Qt-way for this: Don't block the main-thread. If you have heavy 
work to do, either split the loops into slots scheduling themselves via 
QTimer::singleShot or let a worker-thread do the job. QRunnable is probably 
what you are looking for to run a single function in its own thread.

When the gui isn't blocked by long-running functions, starting a timer in 
mousePressEvent and stopping it in mouseReleaseEvent should be pretty 
accurate.

You are not trying to get double-clicks?

Have fun,

Arnold
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