Verified AS3 bugs

Question

I found another serious AS 3 bug so i decided to write up a
verification script so anyone can verify these bugs and hopefully
someone over at adobe can squash them, as they are quite annoying
and require a considerable amount of effort to work around.
The first bug is a dynamically generated movieclip that has
various UI components to it will report its height incorrectly but
will display correctly
The second bug is when a combobox has its value changed it
generates a change event but for some reason, its parent
displayobject does not detect the event.
My project deals with auto layout of several dynamically
generated movieclips that contain dozens of comboboxes so these two
bugs combined are really getting on my nerves.
The code to reproduce these bugs is below. Just copy and
paste in a Flash IDE, add the combobox, checkbox and radiobutton
componets to the FLA's library and launch. I had a screen shot of
the height i measured with photoshop but doesn't look I can attach
it. At any rate, flash outputs 174 and i measured 99 for a
difference of 75.
-------------------------------Sample Code
Begin------------------------------------
//omnidogg - Jan 18,2008
//Code to illustrate 2 AS3 bugs
// 1. ComboBox change event does bubble up to parent
displayobject container
// 2. Dynamically sized movieclip's height property displays
correctly but the value returned from a get operation is incorrect
// just copy and paste into Flash IDE.
//import needed classes for example
import fl.controls.CheckBox;
import fl.controls.ComboBox;
import fl.controls.RadioButton;
import fl.controls.RadioButtonGroup;
//create a empty movie that will be the parent display
object, set backgroud to green, put around middle of stage
var mc1:MovieClip = new MovieClip();
this.stage.addChild(mc1);
mc1.opaqueBackground = 0x00FF00;
mc1.x = 50;
mc1.y = 60;
//create a combobox and add it to mc1. Add two choices to
illustrate change event bubbling bug.
//changing value in combo box generates an event but mc1 does
not detect it.
var cb1:ComboBox = new ComboBox();
mc1.cb1 = mc1.addChild(cb1);
mc1.cb1.x = 220;
mc1.cb1.y = 30;
mc1.cb1.addItem({label:"Choice 1"});
mc1.cb1.addItem({label:"Choice 2"});
//add a checkbox to mc1. This component behaves as expected.
var chkb1:CheckBox = new CheckBox();
chkb1.name = "chkb1";
mc1.chkb1 = mc1.addChild(chkb1);
mc1.chkb1.x = 220;
mc1.chkb1.y = mc1.cb1.y + mc1.cb1.height + 10;
mc1.chkb1.label = "Toggle";
//add two radio buttons in default radiobuttongroup to mc1.
selecting a new value generates 3 change events. I expected 2, 1
for each radiobutton.
//3rd from the radiobutton group? at least something is
generated which is better than nothing
var rb1:RadioButton = new RadioButton();
mc1.rb1 = mc1.addChild(rb1);
mc1.rb1.x = 180;
mc1.rb1.y = mc1.chkb1.y + mc1.chkb1.height + 20;
mc1.rb1.label = "Choice 1";
var rb2:RadioButton = new RadioButton();
mc1.rb2 = mc1.addChild(rb2);
mc1.rb2.x = 260;
mc1.rb2.y = mc1.chkb1.y + mc1.chkb1.height + 20;
mc1.rb2.label = "Choice 2";
//add a event listener to mc1 to detect any change events
mc1.addEventListener(Event.CHANGE,traceChange);
//trace the given text when a change event occurs
function traceChange(event:Event):void
trace("Change Event Detected");
//trace height of movie clip with various UI components
placed in it
trace(mc1.height); //outputs 174, measurements from photoshop
indicate 99. I can send a screenshot to anyone interested.
-------------------------------Sample Code
End--------------------------------------
Of course if these have already been found and squashed,
someone please point to me to the proper resources; seaches of the
knowledgebase don't turn up any revelant info.
Thanks

Answer 1

The incorrect height value you're getting is a timing issue.
Each these
components has a TextField somewhere in its heirarchy, which
is initialized
at 100x100. The resizing of the TextField doesn't occur until
after you've
checked the height of the container MovieClip.
If you listen for Event.ENTER_FRAME, you'll find that the
correct value is
returned once the component is fully rendered. In my test,
the correct value
was available on the 2nd ENTER_FRAME.
Try this:
this.addEventListener(Event.ADDED, _handler);
this.addEventListener(Event.ADDED_TO_STAGE, _handler);
this.addEventListener(Event.RENDER, _handler);
this.addEventListener(Event.ENTER_FRAME, _efhandler);
function _handler(event:Event)
trace(event.type, event.target, mc1.height)
var efcount:uint=0;
function _efhandler(event:Event)
efcount++;
trace(event.type, event.target, mc1.height)
if(efcount > 5) // i use 5, but can be fewer
this.removeEventListener(Event.ENTER_FRAME, _efhandler);