SceneManager example or documentation

Tom2012

Looking to learn about how to change scenes. I had a good look through the reference and documents but couldn't find how to do it. Any starting points would be much appreciated.

Tom

Tom2012

Ah, I found this from a google search...

http://www.giderosmobile.com/blog/2011/11/17/gideros-scene-manager/

ar2rsawseen

And this one might help
http://appcodingeasy.com/Gideros-Mobile/Manage-Scenes-in-Gideros-Mobile

Tom2012

Thanks so, the to get this working (correct me if I'm wrong please)...

1) Copy scenemanager.lua to project folder

2) Add this code to main.lua, defining scenes

--define scenes
sceneManager = SceneManager.new({
--start scene
["start"] = start,
--pack select scene
["pack_select"] = pack_select,
--level select scene
["level_select"] = level_select,
--level itself
["level"] = level
})
--add manager to stage
stage:addChild(sceneManager)


3) On each scene1.lua type file... add:

level_select = gideros.class(Sprite)
function level_select:init()

-- The scenes code goes here

end

Thanks!

Tom2012

Oh and that's a damn good site you have there!

talis

i gave the same reaction when i first discovered it:D Actually the reason i start to dig Gideros is that precious blog of @ar2rsawseen My precious

Tom2012

Hmmm... struggling with this.

Here's what I have in my main.lua

--define scenes
sceneManager = SceneManager.new({
--start scene
["scene 1"] = start,
--pack select scene
["scene 2"] = pack_select,
})
--add manager to stage
stage:addChild(sceneManager);

-- Jump to first scene
sceneManager:changeScene("start", 1, SceneManager.flipWithFade, easing.outBack);


I get:

stack traceback:
scenemanager.lua:264: in function 'changeScene'
main.lua:12: in main chunk


Thanks

Tom

ar2rsawseen

you should use the key of table not object name as

-- Jump to first scene sceneManager:changeScene("scene 1", 1, SceneManager.flipWithFade, easing.outBack);

Tom2012

Thanks, still getting the error...


--define scenes
local sceneManager = SceneManager.new({
--start scene
["scene 1"] = scene1,
--pack select scene
["scene 2"] = pack_select
})

local scenes = {"scene 1" , "pack_select" }


--add manager to stage
stage:addChild(sceneManager);

sceneManager:changeScene("scene 1", 1, SceneManager.flipWithFade, easing.outBack);



main.lua is uploading.
Uploading finished.
scenemanager.lua:264: attempt to index field '?' (a nil value)
stack traceback:
scenemanager.lua:264: in function 'changeScene'
main.lua:15: in main chunk

Tom2012

Ah I'm such a muppet..

The top of each scene lua file needs to have the key

scene1 = gideros.class(Sprite)
function scene1:init()

Tom2012

Wow - that's so easy when you know how ;-)

I'd had nightmares in the past getting a competing product's scene manager to work!

evs

Hello,

I would use scene1 = Core.class(Sprite)

as gideros.class is deprecated


cheers

evs

Tom2012

Thanks Evs!

Mells

Also :

The scene manager dispatches the following four events:

• enterBegin: Dispatched when your new scene is about to enter the stage. You can initialize your variables here.
• enterEnd: Dispatched after the transition of new scene has ended. Mostly, you add listeners and start your logic here.
• exitBegin: Dispatched when your current scene is about to leave the stage. You can remove listeners and stop timers here.
• exitEnd: Dispatched after your current scene has leaved the stage.

Read more here.
(Search 5.7.3 for some code that shows an example scene (“MyScene”) and how you might use the “enterEnd” and “exitBegin” events).

Tom2012

Thanks Mells

Going to look into that now.

What would be the advantage of using those events as opposed to putting variables, listeners and logic in the scene's function here:

scene1 = Core.class(Sprite)
function scene1:init()

-- here

end

ar2rsawseen

@Tom2012
sometimes you may want for objects to appear on screen only after the transition is ended.
Or for example add touch or mouse listeners only when transition is ended, so you won't allow dragging something on the screen while in transition, which might provide some unexpected dragging results

Tom2012

Ah I see what you mean. Makes sense thanks

Tom2012

One more question...

At the moment I have a scene : Menu.lua

In that I have this function:

function startGame()

print("start game");
sceneManager:changeScene("Level 1", 1, SceneManager.flipWithFade, easing.outBack);

end

playButton:addEventListener("click", startGame);




When the button is clicked it says 'start game' but does not change scene.

Any idea why?

Thanks

Tom

Tom2012

Fixed it.

In my scenes I was using stage:addChild where it should be self:addChild