EVENT DRIVEN PROGRAMMING MODULE 2

MICROSOFT WINDOWS

WHO POPULARIZED GUI?

GRAPHICAL USER INTERFACE

popularized by Microsoft Windows, is an interactive visual interface rather than a command or text-only interface. 

WINDOWS,ICONS,MENU, AND POINTER

WHAT IS A WIMP?

GRACOLI

•  a hybrid interface, combines the strengths of the GUI and CLI to perform application specific interfaces

Windows Forms Designer and Toolbox

In C#, the most rapid and convenient way to create your user interface is to do so visually, using the ——.

WINDOWS FORMS CONTROLS

• are reusable components that encapsulate user interface functionality and are used in client-side Windows based applications. 

CONTROL

is a component on a form used to display information or accept user input.

CONTROL CLASS

provides the base functionality for all controls that are displayed on a Form.

PUBLISHER

The class that sends (or raises) the event is called the

SUBSCRIBERS

the classes that receive (or handle) the event are called

EVENT

 is a message sent by an object to signal the occurrence of an action.

EVENT SENDER

The object that raises the event is called the

CHANGED

The List<T> class declares a single event member called

CHANGED

which indicates that a new item has been added to the list.

EVENT HANDLER

typically is a software routine that processes actions such as keystrokes and mouse movements

FUNCTION OR METHOD

containing program statements that are executed in response to an event

EVENT HANDLER

is a callback subroutine that handles inputs received in a program (called a listener in Java and JavaScript)

STATIC EVENT HANDLERS

are in effect for the entire life of the class whose events they handle.

DYNAMIC EVENT HANDLERS

are explicitly activated and deactivated during program execution, usually in response to some conditional program logic

PUBLISHER

The class who raises events is called

SUBSCRIBERS

and the class who receives the notification is called

DELEGATE

defines the signature for the event handler method of the subscriber class

ENCAPSULATED DELEGATE

In C#, an event is an—- —— It is dependent on the delegate. The delegate defines the signature for the event handler method of the subscriber cla

EVENT LISTENER

represents the target for all events generated by event source (EventSource object) implementations in the current application domain

EVENT PROPERTIES

consist of event declarations accompanied by event accessors. Event accessors are methods that you define to add or remove event delegate instances from the storage data structure

TRUE

event properties are slower than event fields, because each event delegate must be retrieved before it can be invoked.