Flex TreeItemRenderer issue with Height

Question

Hello.
I went trought alot of nightmare nights with this TreeItemRenderer in forums, Stack Overflow, Expert-Exchange and etc., and i left without actually help on my issue. I hope i got it here finally.
The idea is basically create an item for a Tree , and this item can have some buttons if it is not a branch, and theese buttons is destributed vertically within the item, just below the label.
Here the piece of code making my days and nights nightmares.
override protected function commitProperties():void
super.commitProperties();
if( data.@idNode != null )
isNode = data.@isNode == "true";
else
isNode = false;
if( isNode )
if( data.@rooming != null )
allowedB1 = data.@b1 == "true";
else
allowedB1 = false;
if( data.@engineControl != null )
allowedB1B2 = data.@b1b2 == "true";
else
allowedB1B2 = false;
if( isNode )
// color box
var _color : uint = 0x000000;
if( data.@busColor )
_color = uint( data.@busColor );
colorBox.graphics.beginFill( _color, 0.9 );
colorBox.graphics.drawRect( 0, 0, 12, 6 );
colorBox.graphics.endFill();
var _buttonStackHeight : Number = 0;
if( allowedB1 )
_buttonStackHeight += 22;
if( allowedB1B2 )
_buttonStackHeight += 44;
_buttonStackHeight += 15;
//buttonsHolder.visible        = _buttonStackHeight > 1;
this.measuredHeight          = _buttonStackHeight +20;
this.measuredMinHeight       = _buttonStackHeight +20;
this.minHeight               = _buttonStackHeight +20;
else
//buttonsHolder.visible = false;
this.measuredHeight          = 20;
this.measuredMinHeight       = 20;
this.minHeight               = 20;
override protected function createChildren() : void
super.createChildren();
mainCheckBox = new CheckBox();
mainCheckBox.setStyle( "verticalAlign", "top" );
mainCheckBox.addEventListener( MouseEvent.CLICK, checkBoxToggleHandler );
addChild( mainCheckBox );
unknownStateImage        = new Image();
unknownStateImage.source = inner;
unknownStateImage.addEventListener( MouseEvent.CLICK, imageToggleHandler );
unknownStateImage.setStyle( "verticalAlign", "top" );
addChild( unknownStateImage );
colorBox = new UIComponent();
addChild( colorBox );
buttonsHolder = new VBox();
addChild( buttonsHolder );
btn1       = new Button();
btn1.label = "b1";
buttonsHolder.addChild( btn1 );
btn2       = new Button();
btn2.label = "b2";
buttonsHolder.addChild( btn2 );
btn3       = new Button();
btn3.label = "b3";
buttonsHolder.addChild( btn3 );
override protected function updateDisplayList( unscaledWidth : Number, unscaledHeight : Number ) : void
super.updateDisplayList( unscaledWidth, unscaledHeight );
        if( super.data )
if( data.@state == STATE_UNKNOWN )
unknownStateImage.x      = mainCheckBox.x +1;
unknownStateImage.y      = mainCheckBox.y - ( imageHeight/2 );
unknownStateImage.width  = imageWidth;
unknownStateImage.height = imageHeight;
else
unknownStateImage.x      = 0;
unknownStateImage.y      = 0;
unknownStateImage.width  = 0;
unknownStateImage.height = 0;
applyStandartObjectsProperties();
buttonsHolder.visible = isNode;
colorBox.visible      = isNode;
if( isNode )
btn1.visible = allowedB1;
//btn2.visible    = btn3.visible = allowedB1B2;
var _buttonStackHeight : Number = 0;
var _buttonsWidth      : Number = unscaledWidth - ( this.icon.x +6 );
colorBox.x = super.icon.x + super.icon.width + 4;
colorBox.y = 7;
if( allowedB1 )
btn1.x      = 1;
btn1.y      = _buttonStackHeight +1;
btn1.height = 20;
btn1.width  = _buttonsWidth;
_buttonStackHeight += 21;
if( allowedB1B2 )
btn2.x      = 1;
btn2.y      = _buttonStackHeight +1;
btn2.height = 20;
btn2.width  = _buttonsWidth;
_buttonStackHeight += 21;
btn3.x      = 1;
btn3.y      = _buttonStackHeight +1;
btn3.height = 20;
btn3.width  = _buttonsWidth;
_buttonStackHeight += 21;
_buttonStackHeight += 10;
buttonsHolder.x       = this.icon.x;
buttonsHolder.y       = 20 +1;
buttonsHolder.height  = _buttonStackHeight +2;
buttonsHolder.width   = _buttonsWidth +2;
buttonsHolder.visible = true;
else
buttonsHolder.visible = false;

Answer 1

I assume you are using EHP4 on a NW 7.0 release?
One of our customers has a similar problem, but we have not yet found a solution for it