Re: [Boost-users] How to block a signal

From: Timmo Stange (ts_at_[hidden])
Date: 2007-02-14 10:14:14

Dahman wrote:
> Hi,
> I have a signal with many slots connected to it and I have a class object witch
> want to have the possibility to block this signal at the start and unblock it
> later, but know nothing about what and how many slots are connected to it (then
> can't use connection.disconnect()).
> 
> Is there any solution for this problem?

The easiest solution would be to use two signals:

signal0<void> initiator;   // the signal that is emitted
signal0<void> broadcaster; // the signal that observers connect to

signals::connection control = initiator.connect(broadcaster);

// ... connect arbitrary number of slots to the broadcaster

control.block();
initiator();		// will not call any slots
control.unblock();
initiator();		// will call the slots

Regards

Timmo Stange