Bring a spite "to front"

dcharno · July 2012

Is there a way to bring a sprite to the front or change its z-index?

petec · July 2012

I usually just remove a sprite and then add it again to bring it to the front.

dcharno · July 2012

Thanks. That's certainly one solution. I'm wondering if that can even be done in an event handler. I wish there was something more straightforward in the api for this.

talis · July 2012

I am developing an application right now and implemented z-axis like @petec said.
My application is running in 2 languages. In the stage there is a back button hidden(removed from stage). When the user is selecting the language i am adding the back button and removing language buttons and vice verse for the language buttons.
In the event handler's of the buttons i am calling below functions.

And by the help of the timer.delayedcall property my objects are not created before scene transition.(fading out main menu and fading in new activity)

EX:
btnTr:addEventListener("click",
function()
stage:removeChild(btnEn)
stage:removeChild(btnTrk)
sceneManager:changeScene("scene2", 1, SceneManager.crossfade, easing.linear)
Timer.delayedCall(1000, turkce, data)
end)

btnBack:addEventListener("click",
function()
stage:removeChild(btnBack)
sceneManager:changeScene("scene1", 1, SceneManager.crossfade, easing.linear)
Timer.delayedCall(1000, back, data)
end)

function ingilizce()
stage:addChild(btnBack)
end

function turkce()
stage:addChild(btnBack)
end

function back()
stage:addChild(btnEn)
stage:addChild(btnTr)
end

dcharno · July 2012

Thanks. That does work and isn't as bad as I thought.

techdojo · July 2012

I haven't tried this yet but I want to try and implement a proper depth sorting function so I can do some 2.5D effects (think old skool vectaballs demos).

Providing all the "heavy lifting" (ie creating the sprites etc) has already been done then I suspect just adding and removing children to a list should be fairly efficient.

Hmm - time to have a play I think!

Scouser · July 2012

@techdojo: Get on with your work

techdojo · July 2012

What's that - making your coffee ???

Scouser · July 2012

That'll do for a start

techdojo · July 2012

There you go hijacking threads again - just for your own evil purposes!
(yes boss, coffee coming right up boss...)

ar2rsawseen · July 2012

Cmon @techdojo Bring your "spite" to front

techdojo · July 2012

@ar2rsawseen - in yer face

unlying · July 2012

May be this is good, but it doesn't fit to objects that you should drag yourself.
I'm trying to make puzzles, but there is a problem with sprites levels. When i drag tile that should be placed, it should be on top. Does anybody knows how to do this?

ar2rsawseen · July 2012

@unlying I think that is exactly that kind of solution, each time you start dragging an object, on mouse down or touch start, simply remove it from parent and add again, and it will be on top.

unlying · July 2012

Wow. It really works. I thought it will be error about child call to parent.
Sorry for my doubts!

bowerandy · July 2012

Actually, I don't think you have to remove it from the parent hierarchy first. So far, when I've needed to do this, I have just been using:

sprite:getParent():addChild(sprite)

which seems to work fine. I have added a helper method to my utilities file that does this:

function Sprite:bringToFront()
	self:getParent():addChild(self)
end

best regards

unlying · July 2012

@bowerandy I like it! Great! Thanks much.

Teranth · July 2012

@bowerandy nice, I am saving that function

Cyberience · March 2013

Slight mod on this. I made it like this:
self:getParent():addChild(self)

As its in the sprites internal controls.....

Scouser · March 2013

@Cyberience: Is that not what @bowerandy wrote in his helper method Sprite:bringToFront()?

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