adding and removing child

[thunderxlight11111]

hi how are you guys ?i hope you all fine .

iam trying to understand how add and removing child work and i did this  short code

here how its work

1-the main stage is empty nothing in it

2- in the library there is class called (MAINMAP1)  the only class in the project

3- i did 2 codes in the (MAINMAP1) class ,  the first didn.t  work and the other  work.

4- iam running from the main stage.

here

the first code

package

{

import flash.system.System;

import flash.system.fscommand;

    import flash.display.MovieClip;

import flash.media.Sound;

    import flash.media.SoundChannel;

    import flash.events.KeyboardEvent;

    import flash.ui.Keyboard;

    import flash.events.Event;

    import flash.events.MouseEvent;

    import flash.display.Stage;

public class MAINMAP1 extends MovieClip {

  public function MAINMAP1(){

    MovieClip(parent).addChild(this);

  }

}

}

it doesn.t add any thing in the main stage it still empty

but the other work (when i added instance of the map class to the main stage this code remove it)

package

{

import flash.system.System;

import flash.system.fscommand;

    import flash.display.MovieClip;

import flash.media.Sound;

    import flash.media.SoundChannel;

    import flash.events.KeyboardEvent;

    import flash.ui.Keyboard;

    import flash.events.Event;

    import flash.events.MouseEvent;

    import flash.display.Stage;

public class MAINMAP1 extends MovieClip {

  public function MAINMAP1(){

     MovieClip(parent).removeChild(this);

  }

}

}

thats all

i hope you guys can help  me

thank you

[_spoboyle · Accepted solution]

in the first example you gave

when you construct MAINMAP1 it tries to add itself to its parent.

but it's doesn't have a parent yet cause you haven't added it to anything

in the second example you manually add MAINMAP1 to the stage (it now has a parent)

so when you construct MAINMAP it removes itself from its parent

to be honest I am suprised even the second one worked

[thunderxlight11111]

ohh thank you

can you please tell me how can i add parent to this class from the begin (i want the main stage to be its parent)  or can you fix it please if you dont mind

thank you

[_spoboyle]

either add MAINMAP1 using addChild in the constructor of your document class (if you have one)

or you'll have to add it on the time line

you should add an eventlistener in the constructor of MAINMAP

addEventListener(Event.ADDED_TO_STAGE, onAdded);

and then in your function onAdded you can access parent

[thunderxlight11111]

thanks

the first way i did it in the first game but here i wanna make game with only 1 class , i will link it later

the second i did it in the same class like this

package

{

import flash.system.System;

import flash.system.fscommand;

    import flash.display.MovieClip;

import flash.media.Sound;

    import flash.media.SoundChannel;

    import flash.events.KeyboardEvent;

    import flash.ui.Keyboard;

    import flash.events.Event;

    import flash.events.MouseEvent;

    import flash.display.Stage;

public class MAINMAP1 extends MovieClip {

  public function MAINMAP1(){

    addEventListener(Event.ADDED_TO_STAGE, onAdded)

  }

  public function onAdded (event:Event):void  {

     MovieClip(parent).addChild(this);

}

}

}

the problem still

maybe i forget something?

thank you

[_spoboyle]

onAdded get's called after addChild so what you have written makes no sense.

if MAINMAP is you document class then you don't need to call addChild that will happen automatically

[thunderxlight11111]

yeah i know that brother

but i want it to be in the same class inside because i have lvl 1 and 2 and 3 

can you please fix that code to make the main its parent

thank you alot brother For your patience

[_spoboyle]

Sorry I don't understand what you are after

[thunderxlight11111]

which thing you dont get it?

[_spoboyle]

what you are trying to achieve

[thunderxlight11111]

i just want to add some code to this code to let it work from MAINMAP class

package

{

import flash.system.System;

import flash.system.fscommand;

    import flash.display.MovieClip;

import flash.media.Sound;

    import flash.media.SoundChannel;

    import flash.events.KeyboardEvent;

    import flash.ui.Keyboard;

    import flash.events.Event;

    import flash.events.MouseEvent;

    import flash.display.Stage;

public class MAINMAP1 extends MovieClip {

  public function MAINMAP1(){

    MovieClip(parent).addChild(this);

  }

}

}

can you please do that?

some codes to let it work well in this code

[_spoboyle]

you can't

you can never call MovieCli(parent).addChild(this) / as I am sure you understand now you don't have access to parent until after calling addChild()

ok let's try and take this step by step

do you have a document class? if so please paste it here

[thunderxlight11111]

no i dont have only 1 class in the library

[_spoboyle]

so you are adding you actionscript on the timeline?

[thunderxlight11111]

no its out in the folder

[_spoboyle]

Yes MAINMAP1 might be an external class, but you need to to either have a document class or add code the timeline as well

[thunderxlight11111]

ohh so there is no solutin except this right?

[_spoboyle]

a class can't add itself to the display list. you have access to the display list from a document class or the timeline. you can then add any other objects to the display list including your MAINMAP1

[thunderxlight11111]

oh thank you alot brother , i get it now all