Re: [flexcoders] addChild problems

[Jason C Reynolds]

Does not work just means it isn't showing up on screen - something is wrong 
with how I am adding stuff to the display list.

MainApp has the canvas object, and the content object - creates an instance of 
any class that extends my ContentTemplate class.
I don't see why canvas.addChild(contentObject) does not work.
Passing a reference of that canvas to the constructor, then 
canvasReference.addChild(anyObject) works.

So in MainApp I have something like this:

contentHolder = new Canvas();
this.addChild(contentHolder);
contentScreen = new SampleScreen(contentHolder);
// SampleScreen extends a template class that extends UIComponent

Inside SampleScreen:
question = new Text();
question.text = some text;
contentHolder.addChild(question);

All this works

But, with all these classes that are going to extend SampleScreen I really 
don't want to pass that reference to contentHolder around.
What is confusing me, is why I couldn't do this:

MainApp
contentHolder = new Canvas();
this.addChild(contentHolder);
contentScreen =  new SampleScreen();
contentHolder.addChild(contentScreen); // HERE is what I want to work, 
contentScreen extends UIComponent - so in my mind it should work (show up on 
screen).

SampleScreen
question = new Text();
question.text = some text;
this.addChild(question); // HERE is the other change from the working version. 
Since SampleScreen extends UIComponent, and above I have added it to the 
canvas' display list, why is it not showing up?


Thanks much for looking... Jason





  - Original Message - 
  From: Manish Jethani 
  To: flexcoders@yahoogroups.com 
  Sent: Wednesday, April 25, 2007 4:11 PM
  Subject: Re: [flexcoders] addChild problems


  If you can show the heirarchy of your objects and which one you're
  trying to add that's failing, that'll help. Also explain what does
  not work means (do you get an error?).

  On 4/26/07, Jason C Reynolds [EMAIL PROTECTED] wrote:
  
  
   Sorry for the vauge subject... here's what I'm trying to do that does not
   work.
  
   I am creating a MainApp class instance in my mxml project file. I want to
   use this to control the basic common stuff throughout the application, and I
   have made an instance of a Canvas object that I will be using as a container
   to the constantly changing part of the screen. I made a ContentTemplate
   class that extends UIComponent (I had problems with addChild in actionscript
   before I realized if it's not pure as3 it needs to be a UIComponent to
   work). From this ContentTemplate class, I have created several classes that
   extend it and want to use addChild/removeChild to change that canvas part of
   the program.
  
   So, in MainApp I have a variable contentScreen of type ContentTemplate. Lets
   just say all ContentTemplate is doing is making a new text control. I tried
   to make this text control in the ContentTemplate, and since it is extending
   UIComponent - I thought just a this.addChild would work... Then in mainApp
   just add it to the display list of the Canvas object. This does not work.
  
   If I pass a reference to that canvas object in the constructor, then
   addChild from there it works.
  
   Hopefully I somewhat clear what I'm trying to do - and anyone have any
   suggestions why this would not work?
  
   Thanks for any response, Jason
  
  
  
   


   

[flexcoders] addChild problems

[Jason C Reynolds]

Sorry for the vauge subject... here's what I'm trying to do that does not work.

I am creating a MainApp class instance in my mxml project file. I want to use 
this to control the basic common stuff throughout the application, and I have 
made an instance of a Canvas object that I will be using as a container to the 
constantly changing part of the screen. I made a ContentTemplate class that 
extends UIComponent (I had problems with addChild in actionscript before I 
realized if it's not pure as3 it needs to be a UIComponent to work). From this 
ContentTemplate class, I have created several classes that extend it and want 
to use addChild/removeChild to change that canvas part of the program.

So, in MainApp I have a variable contentScreen of type ContentTemplate. Lets 
just say all ContentTemplate is doing is making a new text control. I tried to 
make this text control in the ContentTemplate, and since it is extending 
UIComponent - I thought just a this.addChild would work... Then in mainApp just 
add it to the display list of the Canvas object. This does not work.

If I pass a reference to that canvas object in the constructor, then addChild 
from there it works.

Hopefully I somewhat clear what I'm trying to do - and anyone have any 
suggestions why this would not work?

Thanks for any response, Jason