Package javax.microedition.lui

[OPTIONAL] Set of features to implement Line-oriented User Interface.

See: Description

Interface Summary

Interface	Description
DisplayListener	The DisplayListener interface defines a method that is called in response to Display events.

Class Summary

Class	Description
Display	The Display class provides an application with access to the device's user interface hardware resources.
DisplayColor	Class to represent text, background and lighting colors as used in Display.

Enum Summary

Enum	Description
DisplayCapability	Defines the capabilities of a Display.

Package javax.microedition.lui Description

[OPTIONAL] Set of features to implement Line-oriented User Interface.

Description

The APIs in the LUI package provide a set of features for implementing user interfaces in JME Embedded Profile applications. It is made for those implementations running on embedded devices with one or more simple line-oriented displays, good for displaying text messages only that have therefore chosen LUI as their user interface package (see section about UI optionality in the JME Embedded Profile summary for details. Those displays can be built-in or auxiliary ones.

LUI Package Architecture

An application gains access to a display resource using a Display object. Each Display object represents specific application's use of a specific resource, rather than the resource itself. Hence, for a given display resource, each application has its own dedicated Display object for accessing it.

A Display has a display state, indicating whether the logical Display is currently assigned to the underlying hardware or not: A line-oriented display can only be exclusively used by one application at a time. Therefore only one logical Display can be assigned to it at a time.

Display objects also reflect characteristics of the underlying hardware like :

• key event support (depending on whether a user input device is assigned to the display or not; if key events are supported, the InputDevice interface as defined in the javax.microedition.key package MUST be implemented.
• scrolling support
• support of more than one text color
• support of background color with or without the possibility to change it
• support of lighting with or without the possibility to change color

Since:

MEEP-8.0.0