Pseudo-code is:
function checkSelectedObjects ()
if (some defined objects are selected) then
print ("Good choice")
elseif (you need some more objects) then
print ("Try again") --or ("Continue to select") --or("Just one more left")
end
end
So, how to check a multiple selection of the game objects?
Thanks a lot.
You can either do this:
local function handleTouch(event)
if (event.phase == "ended") then
if (event.target.id == "choice1") then
print "1"
elseif (event.target.id == "choice2") then
print "2"
elseif (event.target.id == "choice3") then
print "3"
elseif (event.target.id == "choice4") then
print "4"
end
end
return true
end
for i = 1, 4 do
local choice = display.newRect( display.contentCenterX, 200 * i, display.contentWidth / 2, 100 )
choice.id = "choice" .. i
choice:addEventListener( "touch", handleTouch )
end
or this:
local tableChoices = {}
local function checkSelected()
for i = 1, #tableChoices do
if (tableChoices[i].isSelected) then
print ("choice " .. i .. " selected")
end
end
end
local function handleTouch(event)
if (event.phase == "ended") then
if (event.target.id == "choice") then
event.target.isSelected = true
elseif (event.target.id == "continue") then
checkSelected()
end
end
return true
end
for i = 1, 4 do
local choice = display.newRect( display.contentCenterX, 200 * i, display.contentWidth / 2, 100 )
choice.id = "choice"
choice.isSelected = false
choice:addEventListener( "touch", handleTouch )
table.insert(tableChoices, choice)
end
local continue = display.newRect(display.contentCenterX, 1200, display.contentWidth / 1.2, 200)
continue.id = "continue"
continue:addEventListener( "touch", handleTouch )
Didn’t we discuss exactly this in another topic earlier today? Where did that disappear? 
EDIT:
https://forums.solar2d.com/t/how-to-select-some-game-objects-in-a-correct-way/351134/9
“# Oops! That page doesn’t exist or is private.”
What happened here? I don’t really feel like answering questions if they might disappear all of a sudden…
Yes, please don’t delete threads after you’ve received your answer.
The idea behind using forums is that the knowledge is public and that it can benefit other people as well. Most people, myself included, help others out in the forums because it helps the community at large. Also, if you later came up with a better solution to your question by yourself, then that’s great, but you should consider posting it to the same thread so that others can learn too, i.e. help others out too if you can.
Like Markus already said, I am not particularly motivated to help out if I suspect that my answer will be deleted once it has helped a single person. For that kind of help, i.e. 1on1 tutoring, code review, programming/problem solving, etc. you can just consider hiring me and you will have my undivided attention.
By the way, I didn’t even know that it was possible to delete your own threads. Shouldn’t that be restricted to forum moderators/admins only? I’m afraid we’ll see more threads disappearing as it is now. Everybody might not understand the point of a forum, or have one of a million other reasons to delete their topics when they don’t need them anymore…
@Markus_Ranner
@XeduR
Sorry, gentleman, it’s my fault. I posted two similar topics at the same time, but later flagged one to delete via moderator. Wrong one, seems to me. And, this morning, it was too embarrassing to get your advices lost.
I took your clear examples into account, thank you for that.
Last night I composed a scene, that can clarify and show what I want to invent here.
local composer = require("composer")
local scene = composer.newScene()
local screenW, screenH, halfW = display.actualContentWidth, display.actualContentHeight, display.contentCenterX
function scene:create(event)
local sceneGroup = self.view
local background = display.newRect(display.screenOriginX, display.screenOriginY, screenW, screenH)
background.anchorX = 0
background.anchorY = 0
background:setFillColor(0)
local key1 = display.newRect (100, 150, 50, 50)
local key2 = display.newRect (200, 250, 50, 50)
local key3 = display.newRect (300, 150, 50, 50)
local sum = 0
function key1:touch (e)
if (e.phase == "began") then
self.xScale = 1.3; self.yScale = 1.3
display.getCurrentStage():setFocus(self, e.id)
elseif (e.phase == "ended") then
self.xScale = 1; self.yScale = 1
display.getCurrentStage():setFocus( nil )
key1:removeEventListener("touch", key1)
if (sum == 0) then
print ("Key 1 was found")
sum = sum + 1
elseif (sum == 1) then
sum = sum + 1
print ("Two keys!")
elseif (sum == 2) then
print ("All keys!")
end
end
end
key1:addEventListener("touch", key1)
function key2:touch (e)
if (e.phase == "began") then
self.xScale = 1.3; self.yScale = 1.3
display.getCurrentStage():setFocus(self, e.id)
elseif (e.phase == "ended") then
self.xScale = 1; self.yScale = 1
display.getCurrentStage():setFocus( nil )
key2:removeEventListener("touch", key2)
if (sum == 0) then
print ("Key 2 was found")
sum = sum + 1
elseif (sum == 1) then
sum = sum + 1
print ("Two keys!")
elseif (sum == 2) then
print ("All keys!")
end
end
end
key2:addEventListener("touch", key2)
function key3:touch (e)
if (e.phase == "began") then
self.xScale = 1.3; self.yScale = 1.3
display.getCurrentStage():setFocus(self, e.id)
elseif (e.phase == "ended") then
self.xScale = 1; self.yScale = 1
display.getCurrentStage():setFocus( nil )
key3:removeEventListener("touch", key3)
if (sum == 0) then
print ("Key 3 was found")
sum = sum + 1
elseif (sum == 1) then
sum = sum + 1
print ("Two keys!")
elseif (sum == 2) then
sum = sum + 1
print ("All keys!")
end
end
end
key3:addEventListener("touch", key3)
local key4 = display.newRect (100, 250, 50, 50)
local key5 = display.newRect (200, 150, 50, 50)
local key6 = display.newRect (300, 250, 50, 50)
function key4:touch (e)
if (e.phase == "began") then
self.xScale = 1.3; self.yScale = 1.3
display.getCurrentStage():setFocus(self, e.id)
elseif (e.phase == "ended") then
display.getCurrentStage():setFocus( nil )
key4:removeEventListener("touch", key4)
key4:removeSelf()
key4 = nil
end
end
key4:addEventListener("touch", key4)
function key5:touch (e)
if (e.phase == "began") then
self.xScale = 1.3; self.yScale = 1.3
display.getCurrentStage():setFocus(self, e.id)
elseif (e.phase == "ended") then
display.getCurrentStage():setFocus( nil )
key5:removeEventListener("touch", key5)
key5:removeSelf()
key5 = nil
end
end
key5:addEventListener("touch", key5)
function key6:touch (e)
if (e.phase == "began") then
self.xScale = 1.3; self.yScale = 1.3
display.getCurrentStage():setFocus(self, e.id)
elseif (e.phase == "ended") then
display.getCurrentStage():setFocus( nil )
key6:removeEventListener("touch", key6)
key6:removeSelf()
key6 = nil
end
end
key6:addEventListener("touch", key6)
--[[local function func ()
if (sum == 3) then
composer.gotoScene( "level2" )
end
end
Runtime:addEventListener ("enterFrame", func)]]
sceneGroup:insert( background )
sceneGroup:insert (key1)
sceneGroup:insert (key2)
sceneGroup:insert (key3)
sceneGroup:insert (key4)
sceneGroup:insert (key5)
sceneGroup:insert (key6)
end
function scene:show( event )
local sceneGroup = self.view
local phase = event.phase
if phase == "will" then
elseif phase == "did" then
end
end
function scene:hide( event )
local sceneGroup = self.view
local phase = event.phase
if event.phase == "will" then
elseif phase == "did" then
end
end
function scene:destroy( event )
local sceneGroup = self.view
end
---------------------------------------------------------------------------------
scene:addEventListener( "create", scene )
scene:addEventListener( "show", scene )
scene:addEventListener( "hide", scene )
scene:addEventListener( "destroy", scene )
-----------------------------------------------------------------------------------------
return sceneOk, no hard feelings. Keep questions coming and we’ll do our best to help you.
I’m still not sure exactly what you want to achieve, but looking at your example I can see that you are repeating a lot of your code for no good reason. It looks like the touch listeners for key 1-3 are exactly the same, as are the listeners for key 4-6. Try to extract that to reusable functions instead. Repeated code becomes very hard to read and also hard to maintain once your code base grows bigger, because you need to make the same change in several places. Take a look at @bgmadclown’s example above, or the examples you got from us in the now deleted thread, and you’ll understand what I mean. The same event listener being reused for all objects.