Question

As a follow up to this question: Developing a online exam application, how do I prevent cheaters?

Can I detect when Flex application looses its focus? that is if a user has clicked onto another application or opened a browser tab?

I read this: Detecting when a Flex application loses focus but was not very clear…

Answer 1

The key part of the code at that link is the

systemManager.stage.addEventListener(Event.DEACTIVATE,deactivate); 

The Flash player send outs activate and deactivate events when the focus enters and leaves the player. All you need to do is create a listenr for them and react appropriately.

A more clear example of how to use to the activate and deactivate events can be seen at blog.flexaxamples.com.

Also, it looks like the activate and deactivate events have trouble in some browsers. Colin Moock has more info on that here.