Chapter 8. Events and Responders

Our Calculator already handles events such as mouseclicks on buttons and menu items, but all this was automatic; we haven't had to write any specific code to handle these mouse events. In this chapter we'll learn more about events and the chain of objects that Cocoa uses to respond to events. At the end of the chapter, we'll see how to "catch" events from the keyboard in our Calculator application. This is the final chapter of the Calculator application.