Issue with event listeners for multiple sprites using array of sprites

intellipro21 · December 2014

Hello, We are basically android application developer but we are planning to make simple 2d game for kids, so after some R&D we settled on Gideros and I am currently learning LUA and making simple games using available templates.

Currently I am facing a problem which I am not able to resolve,

If you can download the attached file and check what's wrong, I would be really very grateful,

I am just learning and trying to make a demo for fruit crush for learning purpose only. ( I grabbed some code from net)

1) I am not sure how to implement the touch listeners but I can successfully add touch to single sprites, but if they are generated randomly using a loop and array then I think I am doing something wrong.

for i = 1, 6, 1 do
    	gemsTable[i] = {}
		for j = 1, 6, 1 do
			gemsTable[i][j] = self:newGem(i,j,true)
			--*****if i declare touch events here it works but causes problems after some time, uncomment below and check yourself to know.******
			--[[gemsTable[i][j]:addEventListener(Event.MOUSE_UP, function (event)
												self:onGemTouch(gemsTable[i][j],event)
											end)]]
 		end
 
 	end

2) Another problem I am facing is with Gtween.

--********Another problem is with Gtween, if i change the position using this then its not working properly but if I directly change the postion then it works.
--GTween.new(newGem, 0.5, {y = newGem.destination_y}, {ease = easing.inOutCircular})

Please help me with this as I am stuck here from last few days.

Thanks in advance.

P.S. We are not planning to make a game like this , this is just for learning purpose as I am working on some different kind of game.

ar2rsawseen · December 2014

You could do it with one event inside your init funciton like

function gamescene:init()
    self:addEventListener(Event.MOUSE_UP, self.onMouseUp, self)
end
 
function gamescene:onMouseUp(e)
    for i = 1, 6, 1 do
        for j = 1, 6, 1 do
            if gemsTable[i][j]:hitTestPoint(e.x, e.y) then
                --this gem was touched
                break
            end
        end
    end
end

intellipro21 · December 2014

@ar2rsawseen , I did the same but it still gives me last positions only everytime,
"Gem touched i= 6 j= 6"

(

intellipro21 · December 2014

Please ,, Please ,, Please someone help me with this... ~X(

(

Esc · December 2014

Not sure, but in @ar2rsawseen code, in the 'for' loop, inside the if and before the break statement, I would do a e:stopPropagation()
Hope it helps.

ar2rsawseen · December 2014

@Esc true
I assumed that all other events would be removed and only this one used
still it is a good practice to stop propagation, once you found your target

intellipro21 · December 2014

@Esc , @ar2rsawseen I did like this,, is it correct because I m still getting last index only.
Am i doing something wrong in hitTestPoint part?
I also checked the "gemsTable" values and it contains all other values not only i=6 and j=6.

function gamescene:onMouseUp(event)
	 for i = 1, 6, 1 do
            for j = 1, 6, 1 do
               if gemsTable[i][j]:hitTestPoint(event.x, event.y) then
                print("Gem touched i= "..newGem.i.." j= "..newGem.j)
		event:stopPropagation()
                break
             end
          end
       end
end

intellipro21 · December 2014

OMG,,,, I just did something and it works now,,,
Thank you so much guys @ar2rsawseen,, @Esc ,,you are life saver..
=D> :-bd

tkhnoman · December 2014

Made some change on line :
16,25,41,121

Is this what you expected to happen?
(i haven't edit it completely)

For me, i always use one mouse event/touch event, and use table to seek object.
(And on line 25, i usually use function that attached to the object, for example newGem:touchUp(event) )
It have less bug to do things like that.

Edit: Late to see the last message while editting, lol. \m/ \m/ \m/

intellipro21 · December 2014

thanks @tkhnoman
Oh great! so at the time of creation of any new item/object/sprite , I should insert it in the touchHolder table , right? ,, wow,, that's thoughtful,, I could have never thought of that.. ha ha.,.

^:)^

tkhnoman · December 2014

With that method, you can even :
1. Easily disable multitouch on the same table holder.

2. Setting up priority (for menu and such), with another table holder (gamescene.priorityTouchHolder or something).

3. Disable all touch holder, and enable just one holder, for example used when pop up menu appear.

But when removing, you need to search index, and remove it by index :

 
table.indexOf = function( t, object )
	local result
	for i=1,#t do
		if object == t[i] then
			result = i
			break
		end
	end
	return result
end
 
function table.removeOf(tableGet,object)
	local indexGet = table.indexOf(tableGet,object)
 
	if indexGet then
		table.remove(tableGet,indexGet)
		return true
	else
		 print("removeOf return nil")
		 print(debug.traceback())
	end
end

(removeOf... lol) ;;)

intellipro21 · December 2014

@tkhnoman ,, Hmmm,, I see,,, thanks for detailed info.. it is really helpful...

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