Every component in Sencha Touch has a long list of events that it generates. Given the number of components you will likely have in your application, you can expect a lot of chatter.
Imagine a party with 100 people, all having lots of different conversations. Now imagine trying to pick out all of the useful information from each conversation. It's impossible. You have to focus on a specific conversation in order to gather anything useful.
In the same way, components also have to be told what to listen for, or else our unfortunate partygoer would quickly be overwhelmed. Fortunately for us, there's a configuration for that.
listeners configuration tells the component what events it needs to pay attention to. Listeners ...