Programming Flex 2 
by Chafic Kazoun and Joey Lott

The unconfirmed error reports are from readers.  They have not yet been 
approved or disproved by the author or editor and represent solely the
opinion of the reader.

Here's a key to the markup:
        [page-number]: serious technical mistake
        {page-number}: minor technical mistake
        <page-number>: important language/formatting problem
        (page-number): language change or minor formatting problem
        ?page-number?: reader question or request for clarification

This page was updated April 15, 2008.


UNCONFIRMED  errors and comments from readers: 

[42] example code;
Page number is from the rough cuts pdf. 2007/04/15 version.

Broken example. Code Fragment below...

<project name="FlexTest" default="run" basedir="./">
...
<target name="intialize">
<mkdir dir="${deployDirectory}" />
</target>
<target name="compile" depends="initialize">
...
</project>

Spelling mistake "intialize" should read "initialize".


{75} Last sentence/code fragment;
The last parameter to button.removeEventListener() "onClick" should really be "clickHandler" to reflect 
the code snippet above (since the text mentions that the parameters for both calls must be identical.


{75} Last line of section 4.7;
The last part of section 4.7 reads as follows:
----
The following example removes the event listener added in the previous example:

button.removeEventListener(MouseEvent.CLICK, onClick);
----

However, in the "previous example" as far as I can tell, there was no event "onClick" registered:

---
button.addEventListener(MouseEvent.CLICK, clickHandler);
---

The proper name of the event that should be unregistered is "clickHandler" in this example -- if I'm 
understanding what I'm reading.


{99} first paragraph after example 6-2;
is: First, the initial layout contains six buttons

should be: First, the initial layout contains six labels


[141] Code samle under "Using PopUpButton";
I am using the Flex Builder 2.0.1 tool in Eclipse 3.2.2 and using the snipit of code included in the book 
on page 141 under the "Using PopUpButton" section:

...
var xmlList:XMLList = <items>
<item label="ActionScript"/>
<item label="Class"/>
<item label="Interface"/>
</item>
<item label="MXML">
<item label="Application"/>
<item label="Component"/>
</item>
</items>;
...

Gives me the following error:

"Implicit coercion of a value of type XML to an unrelated type XMLList."

After digging around I found that I had to actually create a new XMLList object using the XML as the 
parameter being passed in. Like so:

var xmlList:XMLList = new XMLList(<items>
<item label="ActionScript"/>
<item label="Class"/>
<item label="Interface"/>
</item>
<item label="MXML">
<item label="Application"/>
<item label="Component"/>
</item>
</items>);

I suspect this might be the case for any page that tries to create a var of type XMLList using the XML 
directly instead of instantiating a new object. (Up until this point I have been creating my collections 
using ActionScript). Maybe the first syntax is correct when compiling by hand, but Flex Builder doesn't 
auto-compile unless I create the new XMLList object =( 


(181) top paragraph;
A sentence reads, "Therefore, changing a value in a numeric stepper used as an item renderer will not 
affect the data provider, whereas it will update the data provider when used as an item renderer." It 
seems as though the second "item renderer" should read "item editor" - but with this interpretation, the 
"However" in the beginning of the next sentence doesn't seem to make sense.


[187/188] Example 8-17;
Does not work right, keyUpHandler generates errors 1023 and 1024.
Changing the name of the function made it work...


[223] public static function parseFromXML;
"xml.@Itemname" should be "xml.@name"

"xml.@itemName does not match what is in the XML file

Also, in the XML file, the last checkbox uses "itemName" instead of name, and the value should be 
something besides "city" 


(250) Example 11-11, import statement line 3 and function initInstace parameters ;
Hi there,

i guess there's a little typo in the mentioned locations on page 250. The "mx.effects.EffectInstance" 
class is imported and used as datatype for the parameter of initInstance. But, in my opinion, it has to 
be the "mx.effects.IEffectInstance" interface in both places, because otherwise the override of 
initInstance is not allowed.


(279) Bottom of page class;
Syntax error in event string for both dispatched events.

should be :
dispatchEvent(new Event("aChange"));
dispatchEvent(new Event("bChange"));

fixed class bellow :

package com.oreilly.programmingflex.binding {

import flash.events.Event;
import flash.events.EventDispatcher;

public class CustomizedDataBindableExample extends EventDispatcher {

private var _a:String;
private var _b:String;

[Bindable(event="aChange")]
public function get a( ):String {
return _a;
}

public function set a(value:String):void {
_a = value;
dispatchEvent(new Event("aChange"));
}

[Bindable(event="bChange")]
public function get b( ):String {
return _b;
}

public function set b(value:String):void {
_b = value;
dispatchEvent(new Event("bChange"));
}


public function CustomizedDataBindableExample( ) {
_a = "a";
_b = "b";
}


}
}


[320] top paragraph;
The text claims that "Type selectors always take precedence over class selectors." However, the reverse 
is true, as shown in example 14-2.


[366] Missing class com.oreilly.programmingflex.lso.ui.LogInForm.as;
I think a class com.oreilly.programmingflex.lso.ui.LogInForm.as referenced by the Main mxml class in the 
login example is missing. I neithe rfind it in the book nor in the associated files. If possible, please 
publish this class, because otherwise, the example code does not compile, thanks!


[450] 1st paragraph;
The example subclasses UIComponent. When I subclass UIComponent, nothing displays. If I subclass a 
container like Canvas without changing any other code, the contents display.