PDAP Programming - Java 2 Micro Edition Application Development - page 87

public void pauseApp() {
}

public void destroyApp (boolean conditional) {
frame.dispose();
}
}

AWT contains lots of other active components and events. Introducing them all here would exceed the
scope of this topic. Table 4.1 gives an overview of the AWT components. Please note that the
component events apply to all other (derived) components, although listed only once in the component
description. Table 4.2 gives an overview of all events that are available in PDAP and the corresponding
listener interfaces that are needed for handling those events.

Tabl e 4.1. AWT Compon e nts and Corresponding Events
Component Name Events Description

Button ActionEvent The Button class is a component that is used to

create a labeled button in order to invoke an
action if it is pushed.

Canvas None The Canvas is a component for custom drawing

by overriding the paint method.

Checkbox ItemEvent

A Checkbox is a component that can be in either
selected (true) or deselected (false) state. An
ItemEvent is fired, when the CheckBox is
(de)selected.

CheckboxMenuItem ItemEvent A CheckboxMenuItem represents one item of a

menu combining the functionality of a MenuItem
and a Checkbox as well. It can be in either
selected (true) or deselected (false) state. An
ItemEvent is fired, when the CheckBox is
(de)selected.

Choice ItemEvent

The Choice class presents a component for
selecting one of a set of possible choices. An An
ItemEvent is fired, when the CheckBox is
(de)selected.

Component FocusEvent The Component class is the abstract superclass

of all nonmenu-related AWT components.
Component can be derived directly to implement
lightweight components.

KeyEvent

MouseEvent

Container ContainerEvent A Container is a specialized component that is

used to hold other components. A
ContainerEvent is fired if a Component is
added or removed from a Container .

Label None

A Label is a component for placing a single read-
only line of text in a container.

List ItemEvent

A List represents a scrolling list of text items for
user selection. An ItemEvent is fired if the user
selects an item in the List.

MenuComponent

None

The class MenuComponent is the superclass of
all menu-related components.

MenuItem ActionEvent

The class MenuItem represents one item of a
menu. An ActionEvent is fired if the MenuItem
is selected.