[flexcoders] Re: createChildren(): adding 20 identical buttons to panel?
Here is a quick and dirty example on how to add multiple instances as
well as how to access them after creation:
?xml version=1.0 encoding=utf-8?
mx:Application xmlns:mx=http://www.adobe.com/2006/mxml;
layout=absolute
xmlns:custom=CustomClasses.*
creationComplete=onCreationComplete()
mx:Script
![CDATA[
import mx.controls.Button;
private function onCreationComplete():void
{
var panelChildren:Array = panelTest.getChildren();
for(var i:int = 0 ; i panelChildren.length ; i++)
{
if(panelChildren[i] is Button)
{
trace((panelChildren[i] as Button).label);
}
}
}
]]
/mx:Script
custom:PanelTest id=panelTest/
/mx:Application
PanelTest.as:
package CustomClasses
{
import mx.containers.Panel;
import mx.controls.Button;
public class PanelTest extends Panel
{
public function PanelTest()
{
super();
for(var i:int = 0 ; i 20 ; i++)
{
var b1:Button = new Button();
b1.label = Button + (i + 1);
addChild(b1);
}
}
}
}
--- In flexcoders@yahoogroups.com, Mic [EMAIL PROTECTED] wrote:
public class PanelTest extends Panel{
private var b1:Button;
override protected function createChildren():void {
super.createChildren();
b1 = new Button;
this.addChild(b1);
In order to add another 19 buttons, must vars b2 to b20 be declared
etc? This is a very simplistic example of what I need to do (
dynamically add multiple instances of the same complex component
class to a layout). Because b1 cannot be reused for another
addChild(), how would you add the other buttons? TIA,
Mic.
RE: [flexcoders] Re: createChildren(): adding 20 identical buttons to panel?
I would advise Repeater for this. It willsave a lot of code and
provides some other benefits like automatically building the array of
references, and optionally recycling children and handling removal of
the children.
Tracy
From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On
Behalf Of valdhor
Sent: Wednesday, October 22, 2008 11:44 AM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Re: createChildren(): adding 20 identical buttons
to panel?
Here is a quick and dirty example on how to add multiple instances as
well as how to access them after creation:
?xml version=1.0 encoding=utf-8?
mx:Application xmlns:mx=http://www.adobe.com/2006/mxml;
layout=absolute
xmlns:custom=CustomClasses.*
creationComplete=onCreationComplete()
mx:Script
![CDATA[
import mx.controls.Button;
private function onCreationComplete():void
{
var panelChildren:Array = panelTest.getChildren();
for(var i:int = 0 ; i panelChildren.length ; i++)
{
if(panelChildren[i] is Button)
{
trace((panelChildren[i] as Button).label);
}
}
}
]]
/mx:Script
custom:PanelTest id=panelTest/
/mx:Application
PanelTest.as:
package CustomClasses
{
import mx.containers.Panel;
import mx.controls.Button;
public class PanelTest extends Panel
{
public function PanelTest()
{
super();
for(var i:int = 0 ; i 20 ; i++)
{
var b1:Button = new Button();
b1.label = Button + (i + 1);
addChild(b1);
}
}
}
}
--- In flexcoders@yahoogroups.com, Mic [EMAIL PROTECTED] wrote:
public class PanelTest extends Panel{
private var b1:Button;
override protected function createChildren():void {
super.createChildren();
b1 = new Button;
this.addChild(b1);
In order to add another 19 buttons, must vars b2 to b20 be declared
etc? This is a very simplistic example of what I need to do (
dynamically add multiple instances of the same complex component
class to a layout). Because b1 cannot be reused for another
addChild(), how would you add the other buttons? TIA,
Mic.
[flexcoders] Re: createChildren(): adding 20 identical buttons to panel?
Thanks for all the help I was trying to b1 = new Button; this.addChild(b1); this.addChild(b1); this.addChild(b1); etc which is why it appeared that b1 was all used up :-)When adding to the displaylist why does b1 = new Button; have to be done each time? Why can't b1, which is an instance of the button class, be duplicated into the list? b1 is just a variable that refers to the instance, right? Not a unique id. Not sure why this is different from mx:Panel mx:Button/ mx:Button/ mx:Button/ /mx:Panel TIA, Mic.
Re: [flexcoders] Re: createChildren(): adding 20 identical buttons to panel?
- Original Message - From: Mic [EMAIL PROTECTED] To: flexcoders@yahoogroups.com Sent: Wednesday, October 22, 2008 10:28 PM Subject: [flexcoders] Re: createChildren(): adding 20 identical buttons to panel? Thanks for all the help I was trying to b1 = new Button; this.addChild(b1); this.addChild(b1); this.addChild(b1); etc which is why it appeared that b1 was all used up :-)When adding to the displaylist why does b1 = new Button; have to be done each time? Why can't b1, which is an instance of the button class, be duplicated into the list? b1 is just a variable that refers to the instance, right? Right, but b1 refers to one button. If you add it ten times over you're trying to add the same button to the container not ten different buttons. Using new Button() gives you a new button, so writing b1 = new Button(); this.addChild(b1); creates a new Button, points b1 at it and adds it to the display list. Do it again and then b1 points to a different Button.. The mxml tag notation not only refers to the Button class but also instantiates a seprate instance, so you would get ten different buttons. Paul Not a unique id. Not sure why this is different from mx:Panel mx:Button/ mx:Button/ mx:Button/ /mx:Panel TIA, Mic.
