Creating a custom button

You know a bit more about the Button class now, so let's put that knowledge to use. We'll create a fairly simple custom button (of control type TYPE_BUTTON) that will update the base layer's opacity and zoom the map to a random spot. We'll cover the few basic things that should be included when creating a button:

• Specifying the button's displayClass to give it style (optional)

• Creating a function and setting it as the trigger function

• Adding the button a panel, and then adding that panel to a map