How does Gideros Lua 'Override' base class?

newbie2018

I read this related post. But I haven't figured out how it works.

First, I have this base class "Item" (simple one)

Item = Core.class(Sprite) function Item:init() self:addEventListener(Event.TOUCHES_BEGIN, self.onTouchesBegin, self) end

It works perfectly.
Now I would like to create another class "SubItem"

SubItem = Core.class(Item) function SubItem:init() self:addEventListener(Event.TOUCHES_BEGIN, self.onTouchesBegin, self) end

I would like to have it behave such a way that, when it is touched, it is triggering the onTouchesBegin of the SubItem, but not the base class Item.

Now, from observation, it enters "Both" - first from base class, then its own onTouchesBegin

Not sure I have missed out anything. Is that a way to override the base class function? (without calling its base class function)

P.S.:
Sorry I missed out the point that it is a 'Constructor'.

oleg

use
e: stopPropagation ()

in the onTouchesBegin function

newbie2018

@oleg
Thanks for your response. Do you mean this? (Adding to both base and subclass).

Item = Core.class(Sprite) function Item:init() self:addEventListener(Event.TOUCHES_BEGIN, self.onTouchesBegin, self) end   function Item:onTouchesBegin(e) e: stopPropagation () -- my logic here... end

SubItem = Core.class(Item) function SubItem:init() self:addEventListener(Event.TOUCHES_BEGIN, self.onTouchesBegin, self) end   function SubItem:onTouchesBegin(e) e: stopPropagation () -- my logic here... end

I actually had this. But doesn't seem to work...
Probably I miss out something... Or did I misunderstand .. When it "stopPropagation", does it mean it stop propagating to its base class?

oleg

variant2

Item = Core.class(Sprite) Item = Core.class(Sprite) function Item:init() self:addEventListener(Event.TOUCHES_BEGIN, self.onTouchesBegin, self) end   function Item:onTouchesBegin(e) e: stopPropagation () -- my logic here... print("Item") end SubItem = Core.class(Item) function SubItem:init() self:removeEventListener(Event.TOUCHES_BEGIN, self.onTouchesBegin, self) self:addEventListener(Event.TOUCHES_BEGIN, self.onTouchesBegin2, self) end   function SubItem:onTouchesBegin2(e) e: stopPropagation () print("SubItem") -- my logic here... end   a=SubItem.new() stage:addChild(a)

newbie2018

Haha @oleg
it works~ thanks

newbie2018

By the way, i think I understand overall what I messed up now...
I used to do initialization in the Constructor.
But those initialization always call the base class functions before those from subclass.

As an alternative, I need to have another function (eg: named as Setup()). This function would override the base one without calling the base contents...

newbie2018

It may sound strange, this actually works...
add a minor delay... LOL

function Item:init() Timer.delayedCall(1, function() self:Setup() end) end

it wouldn't call the base class function this way