#Signal# Signals and slots are used for communication between objects. The signals and slots mechanism is a central feature of Qt. signal is emitted when a particular event occurs. A slot is a function that is called in response to a particular signal. You can connect as many signals as you want to a single slot, and a signal can be connected to as many slots as you need.

##Usage

You create an instance of Signal, connecting a slot function as callback.

var ticked=new Signal();
ticked.connect(function(now){
 console.log(now)
})

then later you emit an async event

setInterval(function(){

ticked.emit(new Date().getTime())

},500);

#API

• connect(slot,scope) Connects the signal this to the incoming slot function. scope is the scope where slot runs.

• connectOnce(slot,scope) Connects once the signal this to the incoming slot function. scope is the scope where slot runs.

• disconnect(slot,scope) The given slot are disconnected.. scope is the scope where slot runs.

• disconnectAll() Disconnects all slots connected to the signal.

• emit(*) Dispatches an event into the signal flow. You can pass in any Object.