Enable / Disable Checkbox

Question

I am writing a flex application that will use check boxes
that will be enabled under certain conditions. Right now I have it
halfway working with a CLICK MouseEvent, but by doing it this way
the conditions are only checked when the checkbox is clicked. Is
there a method or property of the checkbox that will check the
conditions in realtime, and not with a MouseEvent?

Answer 1

You will probably want to use data binding. Let's assume you
have some method that gets called when the "conditions" changes. In
that method, you'd set the value of a Boolean to either true or
false. You'd then bind that value to the checkbox's enabled
property.
Sounds harder than it is. An example will probably be best.
This example also uses a click event, but on a different component
(the button). What it shows you is that you can set the value of a
var called stateOfCheckBox from anywhere in your app, and you will
be able to toggle the state of the checkbox.
hth,
matt horn
flex docs
<?xml version="1.0"?>
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
creationComplete="initApp();" >
<mx:Script>
<![CDATA[
[Bindable]
private var stateOfCheckBox:Boolean;
private function initApp():void {
stateOfCheckBox = true; //default to true
private function changeStateOfCheckBox(e:Event):void {
if (myCheckBox.enabled) {
stateOfCheckBox = false;
} else {
stateOfCheckBox = true;
]]>
</mx:Script>
<mx:CheckBox id="myCheckBox"
enabled="{stateOfCheckBox}"/>
<mx:Button id="myButton"
click="changeStateOfCheckBox(event)" label="Toggle Checkbox"/>
</mx:Application>