I have some code where I set up touch event handler for a sprite
and
a tap handler for a few different images.
My game plays in rounds. When a time limit expires the round is over. In order to start they next round you touch the sprite.
At this point my images are visible too but when I touch the image it is going to the sprite handler.
I only add the events once in the beginning of the code so how is it possible my tap handler for my image is going to the touch handler of my sprite?
I should have added this is somewhat random. It doesn’t happen all of the time.
It’s really hard to answer your question without seeing some code.
But I guess I can provide some general info:
if you register a tap and a touch event handler on a display object, tapping it will trigger both the tap and the touch event handler (the latter will be triggered several times)
if you want to prevent a touch/tap event handler from propagating to objects below the one that was touched/tapped, your event handler must return true
Hello _memo
Thanks for that. I was missing return true in some of my event handlers, but adding that in didn’t make a difference. After about the third round the image handler event triggers the sprite event.
I didn’t add any code because there is a lot of it. The entire program is 2059 lines long. Let me try the event handler for one image object and the event handler for the sprite object. Maybe someone will see something I missed:
SPRITE OBJECT EVENT HANDLER:
play_flame = function(event)
if play_flame_in_status_flag == false then
if event.phase == “began” then
display.getCurrentStage():setFocus( event.target )
event.target.isFocus = true
sfAnimation:play()
markX = sfAnimation.x – store x location of object
markY = sfAnimation.y – store y location of object
if newRound == true then
transition.to( stoneBench, {time=1000, alpha=0})
transition.to( scoreTextLine1, {time=1000, alpha=0})
transition.to( scoreTextLine2, {time=1000, alpha=0})
transition.to( round_ending_score, {time=1000, alpha=0})
transition.to( scoreTextLine3, {time=1000, alpha=0})
transition.to( scoreTextLine4, {time=1000, alpha=0})
transition.to( scoreTextLine5, {time=1000, alpha=0})
transition.to( endStone, {time=1000, alpha=0})
newRound = false
startTimer()
scoreNum = 0
gamescoreText.text = string.format("%-15u", scoreNum)
end
if isphysics_started == false and event.target == sfAnimation then
transition.to( fireText, {time=1000, alpha=0})
physics.start()
isphysics_started = true
end
elseif event.target.isFocus then
if event.phase == “moved” then
local x = (event.x - event.xStart) + markX
local y = (event.y - event.yStart) + markY
sfAnimation.x, sfAnimation.y = x, y – move object based on calculations above
elseif event.phase == “ended” or event.phase == “cancelled” then
display.getCurrentStage():setFocus( nil )
event.target.isFocus = false
sfAnimation.myName = “flame”
sfAnimation.x = firestand.x + 10
sfAnimation.y = flame_origin
end
end
end
return true
end
IMAGE OBJECT EVENT HANDLER
flameBlast = function(event)
print(“physics state”)
print(isphysics_started)
if isphysics_started == true then
audio.play(flameBlastExplosion)
blast_stones()
for i = 1, maxSlots do
if slot_table[i].powercard == event.target then
slot_table[i].number_of_cards= slot_table[i].number_of_cards - 1
number_of_cards = slot_table[i].number_of_cards
current_number_of_cards_text = slot_table[i].textadd
current_number_of_cards_text.text = number_of_cards
if slot_table[i].number_of_cards == 0 then
slot_table[i].slotFilled = false
slot_table[i].powercard.alpha = 0
slot_table[i].powercard.x = centerx
slot_table[i].powercard.y = centery
slot_table[i].textadd.alpha = 0
end
break
end
end
end
return true
end
Thanks for looking!
Hm… unfortunately, I can’t reach any conclusion from looking at the event handlers - how does the code look where you actually register the event handlers? Could you provide a screenshot that shows how the involved display objects are placed related to each other?
I should have added this is somewhat random. It doesn’t happen all of the time.
It’s really hard to answer your question without seeing some code.
But I guess I can provide some general info:
if you register a tap and a touch event handler on a display object, tapping it will trigger both the tap and the touch event handler (the latter will be triggered several times)
if you want to prevent a touch/tap event handler from propagating to objects below the one that was touched/tapped, your event handler must return true
Hello _memo
Thanks for that. I was missing return true in some of my event handlers, but adding that in didn’t make a difference. After about the third round the image handler event triggers the sprite event.
I didn’t add any code because there is a lot of it. The entire program is 2059 lines long. Let me try the event handler for one image object and the event handler for the sprite object. Maybe someone will see something I missed:
SPRITE OBJECT EVENT HANDLER:
play_flame = function(event)
if play_flame_in_status_flag == false then
if event.phase == “began” then
display.getCurrentStage():setFocus( event.target )
event.target.isFocus = true
sfAnimation:play()
markX = sfAnimation.x – store x location of object
markY = sfAnimation.y – store y location of object
if newRound == true then
transition.to( stoneBench, {time=1000, alpha=0})
transition.to( scoreTextLine1, {time=1000, alpha=0})
transition.to( scoreTextLine2, {time=1000, alpha=0})
transition.to( round_ending_score, {time=1000, alpha=0})
transition.to( scoreTextLine3, {time=1000, alpha=0})
transition.to( scoreTextLine4, {time=1000, alpha=0})
transition.to( scoreTextLine5, {time=1000, alpha=0})
transition.to( endStone, {time=1000, alpha=0})
newRound = false
startTimer()
scoreNum = 0
gamescoreText.text = string.format("%-15u", scoreNum)
end
if isphysics_started == false and event.target == sfAnimation then
transition.to( fireText, {time=1000, alpha=0})
physics.start()
isphysics_started = true
end
elseif event.target.isFocus then
if event.phase == “moved” then
local x = (event.x - event.xStart) + markX
local y = (event.y - event.yStart) + markY
sfAnimation.x, sfAnimation.y = x, y – move object based on calculations above
elseif event.phase == “ended” or event.phase == “cancelled” then
display.getCurrentStage():setFocus( nil )
event.target.isFocus = false
sfAnimation.myName = “flame”
sfAnimation.x = firestand.x + 10
sfAnimation.y = flame_origin
end
end
end
return true
end
IMAGE OBJECT EVENT HANDLER
flameBlast = function(event)
print(“physics state”)
print(isphysics_started)
if isphysics_started == true then
audio.play(flameBlastExplosion)
blast_stones()
for i = 1, maxSlots do
if slot_table[i].powercard == event.target then
slot_table[i].number_of_cards= slot_table[i].number_of_cards - 1
number_of_cards = slot_table[i].number_of_cards
current_number_of_cards_text = slot_table[i].textadd
current_number_of_cards_text.text = number_of_cards
if slot_table[i].number_of_cards == 0 then
slot_table[i].slotFilled = false
slot_table[i].powercard.alpha = 0
slot_table[i].powercard.x = centerx
slot_table[i].powercard.y = centery
slot_table[i].textadd.alpha = 0
end
break
end
end
end
return true
end
Thanks for looking!
Hm… unfortunately, I can’t reach any conclusion from looking at the event handlers - how does the code look where you actually register the event handlers? Could you provide a screenshot that shows how the involved display objects are placed related to each other?