Event Driven Week 2

JLabel

The class can display either text, an image, or both.

display

Label's contents are aligned by setting the vertical and horizontal alignment in its ____ area

vertically centered

By default, labels are ______ in their display area

Text-only

____ labels are leading edge aligned by default

image-only

_____ labels are horizontally centered by default

JButton

an implementation of a push button

JToggleButton

a two-state button typically used on toolbars to indicate the state of a toggleable (on/off) option, such as the bold, italic and underline font attributes that are enabled when using a word processor

Imagelcon

an implementation of the Icon interface that paints Icons from Images

JTextField

a component which allows the editing of a single line of text.

JPassword Field

a component which is specialized to handle password functionality and
allows the editing of a single line of text.

JTextArea

a multi-line area to display plain text

Events

______ are generated as a result of user interaction with the graphical user interface components such as clicking on a button, moving the mouse, entering a character through keyboard, selecting an item from the list, etc

Event Handling

is the mechanism that controls the event and decides what should happen if an event occurs.

Event Handler

This mechanism has a code which is known as an ______, that is executed when an event occurs.

Delegation Event Model

Java uses the _______ to handle the events. This model defines the standard mechanism to generate and handle the events

Foreground Events

These events require direct interaction of the user.

Foreground Events

These events are generated as consequences of a person interacting with the graphical components in the Graphical User Interface

Background Events

These events require indirect interaction of the end user

Background

Operating system interrupts, hardware or software failure, timer expiration, and operation completion are some examples of _______ events

Foreground

clicking on a button, moving the mouse, entering a character through keyboard, selecting an item from list, scrolling the page are some examples of _____ events

Source

_____ is an object on which the event occurs

Source

responsible for providing information of the occurred event to it's handler

Listener

It is also known as event handler

Listener

responsible for generating a response to an event

Listener

________ is an object that waits until it receives an event. Once the event
is received, the ________ processes the event and then returns (one word)

Listener

In this model, the ______ needs to be registered with the source object so that the listener can receive the event notification

ActionEvent

Is generated when button is clicked or the item of a list is double-
clicked

KeyEvent

On entering the character the ______ is generated

MouseEvent

This event indicates that a mouse action occurred in a component. This low-level event is generated by a component object for Mouse Events and Mouse motion events

WindowEvent

This low-level event is generated by a Window object when it is opened, closed, activated, deactivated or when the focus is transferred into or out of the Window

MouseMotion Event

indicates a mouse action occurred in a component. This low-level event is generated by a component object when a mouse is dragged or moved

PaintEvent

The object of this class represents the change in the state of a window

EventListener

represent the interfaces responsible to handle events

EventListener

It is a marker interface which every listener interface has to extend.

EventListener

This class is defined in java.utiI package

ActionListener

used for receiving the action events

ItemListener

used for receiving the item events

KeyListener

used for receiving the key events

MouseListener

used for receiving the mouse events

MouseMotionListener

used for receiving the mouse motion events

WindowListener

used for receiving the window events

FocusListener

used for receiving the focus events