[EMAIL PROTECTED] wrote:
Thanks again for the insight, my C++ is a bit rusty so I didn't really
get everything. But after all you're saying that if I give the same
XDispatch object to the other button it should also get the same
Listener, right?
My experience shows that no matter what XDispatch I return, the
addStatusListener gets called everytime and a new StatusListener gets
assigned and I don't have a chance to tell it which one, since the
addStatusListener gets the new StatusListener as an argument.
So have can I control this behaviour?
Hi Jimmy,
I am not sure if I understand your current problem. First you should
assure that you provide one dispatch object for a command.
AddStatusListener is called by user every interface elements which is
bound to the command. That means you have no influence when or how often
addStatusListener is called. Therefore a dispatch object must maintain a
container for the listeners which can add themselves via addStatusListener.
The logical structure (pseudo code!) should look like:
DispatchObject::addStatusListener( XStatusListener xStatusListener )
{
// Add new listener to my listener container
ListenerContainer.add( xStatusListener );
// Create current state event
FeatureStateEvent aFeatureStateEvent;
aFeatureStateEvent.State = aState;
...
// send current status to the new listener
xStatusListener.statusChanged( aFeatureStateEvent );
}
void DispatchObject::removeStatusListener( XStatusListener xStatusListener )
{
// remove status listener from my container
ListenerContainer.remove( xStatusListener );
}
XDispatch XDispatchProvider::queryDispatch( URL aURL, ... )
{
if ( aURL.Protocol.equalsAscii( "myprotocol:" ))
{
// Look for a previously created dispatch object
dispatchObject = container[aURL];
if ( dispatch == null )
{
// create on demand new dispatch object
dispatchObject = new DispatchObject( aURL );
container[aURL] = dispatchObject;
}
return dispatchObject;
}
return null;
}
Regards,
Carsten
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