How to get specific part of object when calling touch listener on Corona - listener

Question

I have a group which presents a character. It contains head, arms and other parts of body.
I want to set touch Listener to that group so when I touch the head, arms and body will do some movements.
I don't want to set touch listener to head only, but the whole group.
I set name to head, and hope event.other can work(like collision), but it's not.
Do you have any solution?
My code below
local touchListener= function( event )
if (event.phase=="began") then
local group = event.target
local head= group[1]
local arms= group[2]
local body= group[3]
if( event.other.name == "head" ) then
// do something here
end
end
return true
end

Answer 1

You should first create those spesific parts of the body. And then you should add touch listeners to everyone of them. For example, you have objects named "head", "arms" and "body"
head.id = "head"
arms.id = "arms"
body.id = "body"
head:addEventListener( "touch", touchHandler )
arms:addEventListener( "touch", touchHandler )
body:addEventListener( "touch", touchHandler )
-- Touch function here
local function touchHandler( event )
if event.phase == "began" then
display.getCurrentStage():setFocus( event.target )
event.target.isFocus = true
elseif event.target.isFocus then
if event.phase == "moved" and not ( inBounds( event ) ) then
display.getCurrentStage():setFocus( nil )
event.target.isFocus = false
elseif event.phase == "ended" then
if event.id == "head" then
-- Do stuff for head
elseif event.id == "arms" then
-- Do stuff for arms
elseif event.id == "body" then
-- Do stuff for body
end
display.getCurrentStage():setFocus( nil )
event.target.isFocus = false
end
end
return true
end
function inBounds( event )
local bounds = event.target.contentBounds
if event.x > bounds.xMin and event.x < bounds.xMax and event.y > bounds.yMin and event.y < bounds.yMax then
return true
else
return false
end
end
This code will also look for boundries of an object. For example, if user touchs the screen and then moves his/her finger to outside of the object, the object will no longer be focused.
Cheers ^^