Question

well, I have a combobox which I have bind his selectedItem property to a value object object, like this

<fx:Binding source="styles_cb.selectedItem.toString()" destination="_uniform.style"/>
<fx:Declarations>
<fx:XML id="config_xml" xmlns="" source="config.xml" />
<!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>

<mx:ComboBox x="66.15" y="63.85" editable="false" id="styles_cb" dataProvider="{config_xml.styles.style}" />

the value object is a custom class with some setters and getters, and I want to set a property based of the value of the selectedItem of the combo, so inside the value object I have something like this

[Bindable]
public function set style(value:String):void
{
_style = value;
trace(value);
}

my problem is that each time I change the combobox selection which in fact change the style property of the value object it does it 3 times, if I trace the value of the setter it actually do the trace 3 times, why?? how can I avoid this? I’m doing something wrong? or there is a better way to do it, please help, thanks for any help

Answer 1

wow!!, some times writing a question let you think about it twice and let you find the answer by yourself, so I find my own solution, in the documentation said I can make all the properties of an object bindables if I put [Bindable] in the class declaration, so I did it like this

[Bindable]
[RemoteClass(alias='Uniform')]
public class Uniform extends Object implements IEventDispatcher

however when I was trying to dispatch an event in the setters I found in the docs that I must add the event name like this

[Bindable("styleChanged")]
public function get style():String
{
   return _style;
}

public function set style(value:String):void
{
 _style = value;
 dispatchEvent(new Event("styleChanged"));
}

now I found that doing this, mark the property with a double bind and that was making me set the property many times, hugg!, but now I know I can avoid using the second [Bindable] and still the event get dispatch, so now I wonder why I need to use [Bindable(“styleChanged”)] in the first place if I still can dispacth the event with only [Bindable] and the dispatch method?, weird

hope this help to someone