Binding Enabled to a function

[captainjon]

Hello,

I want to bind a function to the enabled state of a button, but when
I do, it doesnt work. I can put an expression into the binding like
{list.selectedIndex > -1} and this is fine but I need to put multiple
expressions and it doesnt like && in the binding string.
How can I use a function here (or multiple expressions) ?

thanks,

Jon

[captainjon]

let me just add that the function only seems to execute once at creation time and just uses that value.

[jimmy5804]

It is easy to bind to a function as long as the function takes a parameter you want to watch. (e.g. <mx: .... enabled="{isEnabled(myObj.myVar)}"... />") The function will be called every time the function parameter changes. You can also bind to a function that takes no parameters, but you have to create and dispatch your own event and it's usually more work than it's worth IMO.

[captainjon]

thanks, I'll give that a go