about EventDispatcher

alexzheng

Is the EventDispatcher avaiable in the listener function currently? not passed as data.

EventDispatcher:addEventListener(type, listener, data)

for example, when handle mutiple events in one function,it's better to get who dispatch that event.

ar2rsawseen

You mean which object dispatched event? That could be retrieved from e:getTarget()

OR do you mean, what type of event was dispatched? e:getType()

alexzheng

yes, getTarget() return the EventDispatcher object.

I thought getTarget() return the listener function according to the reference manual.
It says "The target of an event is a listener function and an optional data value".

alexzheng

-- create the button
local button = Button.new(up, down)

-- register to "click" event
local click = 0
print(button)


function listener(event)
print(event:getTarget())
click = click + 1
label:setText("Clicked " .. click .. " time(s)")
end

print(listener)

button:addEventListener("click", listener
)

And output:
table: 03399600
function: 0339A4B8
table: 03399600

event:getTarget() return the button, not the listener function.

ar2rsawseen

Sorry, you lost me. Was it right or was it wrong?

alexzheng

Sorry, you lost me. Was it right or was it wrong?

you are right, the reference manual confused me.