Why event:stopPropagation() doesn't work for me?

Apollo14 · August 2019

Hi guys!
I have black overlay to prevent buttons underneath it being clicked.
Why it doesn't stop event.touch propagation? It detects touches, but they propagate further below.

--BlackOverlay.lua:
BlackOverlay=Core.class(Sprite)
 
function BlackOverlay:init(overlayColor)
	local color=overlayColor or 0
	self.pixel=Pixel.new(color,1,720,1280); --self.pixel:setAlpha(0)
	self:addChild(self.pixel)
 
	self:addEventListener(Event.TOUCHES_END, function(event)
		if self.pixel:hitTestPoint(event.touch.x,event.touch.y) then event:stopPropagation(); print"touched pixel" end
	end)
end

--Main.lua:
sceneManager = SceneManager.new({
	["scene1"] = scene1,
	["scene2"] = scene2,
	["scene3"] = scene3,
	["scene4"] = scene4,
	["scene5"] = scene5,
})
stage:addChild(sceneManager)
sceneManager:changeScene("scene1")
 
BLACKOVERLAY=BlackOverlay.new()
stage:addChild(BLACKOVERLAY)

oleg · August 2019

дотики припиняються лише на ті об'єкти які нижче в ієрархії сцени, а на ті об'єкти які вище -дотики не припиняються..

переконайся що вище спрайту нічого немає

також додай подію нажаття(click down) і там теж пропиши event:stopPropagation

Apollo14 · August 2019

scenemanager is lower than black overlay, but the touch still reaches scenemanager

oleg · August 2019

Apollo14 said:
scenemanager is lower than black overlay, but the touch still reaches scenemanager

зроби змінну pause=true , і вимикай обробку подій коли вона увімкнена, -я таку обробку додав прямо у свій клас кнопок

коли дадаєш оверлей вмикай змінну, коли прибираєш вимикай

Apollo14 · August 2019

@oleg such solutions will create many inconveniences later on, interface in this game is very complicated

pie · August 2019

Go to gideros coding easy by @ar2rsawseen and copy lines from 571 to 601 somewhere in your project, then you can use sprite:ignoreTouches and sprite:enableTouches

Here: https://github.com/ar2rsawseen/GiderosCodingEasy/blob/master/GiderosCodingEasy.lua

Apollo14 · August 2019

@pie wow actually this whole library is pretty handy

hgy29 · August 2019

Actually putting a sprite layer to stop event propagation is so common that I think gideros should have a simpler api to do it

pie · August 2019

@Apollo14 yes it is, but it's pretty old and some method could be no longer compatible with current gideros api (I am thinking about textfield additions). Plus it mess up with setters and getters and it makes it incompatible with Layers lib by nicke and if I recall with some other things too.. Something still works though, I think that the best way to use it is to extract the code you need and use just that (sprite:hide and sprite:show are pretty useful too)

antix · August 2019

Maybe you should be using "TOUCHES_BEGIN" because if you are using TOUCHES_END then other objects have already received events.

Maybe try something like this (not tested)...

--BlackOverlay.lua:
BlackOverlay=Core.class(Sprite)
 
function BlackOverlay:init(overlayColor)
	local color=overlayColor or 0
	self.pixel=Pixel.new(color,1,720,1280); --self.pixel:setAlpha(0)
	self:addChild(self.pixel)
 
	self:addEventListener(Event.TOUCHES_BEGIN, self.gobbleTouches(self)
	end)
	self:addEventListener(Event.TOUCHES_MOVE self.gobbleTouches(self)
	end)
	self:addEventListener(Event.TOUCHES_END, self.gobbleTouches(self)
	end)
 
function BlackOverlay:gobbleTouches(e)
	if self.pixel:hitTestPoint(e.touch.x,e.touch.y) then e:stopPropagation(); print"touched pixel"
end
end

Apollo14 · September 2019

hgy29 said:
Actually putting a sprite layer to stop event propagation is so common that I think gideros should have a simpler api to do it

Hi @hgy29 !
Imho besides 'Sprite:ignoreTouches()' it could be great to have 'Sprite:destroy()' call (remove all children, and children of children, with whatever listeners and timers they have)
Is it a good thing or it may cause problems somewhere?

hgy29 · September 2019

The problem with a Sprite:destroy() call is about lua references. If you still have references to deleted sprites in your lua app, then trying to use them will lead to a crash. I think it is better to leave memory managment as it is, and have gideros free resources when lua no longer needs them.

Howdy, Stranger!

Categories

In this Discussion

Top Posters

Why event:stopPropagation() doesn't work for me?

Comments

Howdy, Stranger!

Quick Links

Categories

In this Discussion

Top Posters

Why event:stopPropagation() doesn't work for me?

Comments