Re: [Lmuse-developer] DSSI automation does not work with native GUIs

[Luis G. <lui...@us...>]

On 05/06/2012 08:38 PM, Tim E. Real wrote:
> Something may be re-transmitting them to the gui
>   and then we get them once more.

That may be some kind signal-slot loop, it is a very common problem in 
GUI elements which may be changed both programatically (e.g. in response 
to OSC messages) and by the user.

When you change a control in response to an OSC message you must 
deactivate its signalling (QObject::blockSignals), change it and 
activate signalling again. Otherwise it will be taken as user input, 
which will trigger unwanted OSC messaging.

QWidgets have an internal signal block (won't signal back if the change 
slot is invoked with the current value) but this is not enough sometimes.

Luis