javax.microedition.lcdui
Class ChoiceGroup

java.lang.Object
  |
  +--javax.microedition.lcdui.Item
        |
        +--javax.microedition.lcdui.ChoiceGroup

All Implemented Interfaces:

Choice

public class ChoiceGroup

extends Item

implements Choice

A choice group provides a mechanism to select items

Nested Class Summary

protected class

ChoiceGroup.Peer Peer class that does the drawing

Nested classes inherited from class javax.microedition.lcdui.Item

Field Summary

Fields inherited from class javax.microedition.lcdui.Item

form, highlighted, label, peer

Fields inherited from interface javax.microedition.lcdui.Choice

EXCLUSIVE, IMPLICIT, MULTIPLE

Constructor Summary

ChoiceGroup(java.lang.String label, int type)
Create a new list

ChoiceGroup(java.lang.String label, int type, java.lang.String[] strings, Image[] images)
Create a new list specifying the contents of the list

Method Summary

int	append(java.lang.String string, Image image) Append an element to the choice
void	delete(int pos) Delete the element at the specified position
Image	getImage(int pos) Get the image at the position
int	getSelectedFlags(boolean[] array) Return the state of all the selections
int	getSelectedIndex() Return the selected items index
java.lang.String	getString(int pos) Get the string part of the element at the posiotion
void	insert(int pos, java.lang.String string, Image image) Insert a new value before the specified element.
boolean	isSelected(int pos) Return true if the item at the position is selected
void	set(int pos, java.lang.String string, Image image) Set the element at the specified position to the new string and image
void	setSelectedFlags(boolean[] flags) Set the selected state of every element
void	setSelectedIndex(int pos, boolean selected) Set the selection state of the item at the specified position
int	size() Get the size of the choice

Methods inherited from class javax.microedition.lcdui.Item

getLabel, setLabel

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ChoiceGroup

public ChoiceGroup(java.lang.String label,
                   int type)

Create a new list

Parameters:

label - The label

type - The list type

Throws:

IllegalArgumentException - if the type is not IMPLICIT, EXCLUSIVE or MULTIPLE

ChoiceGroup

public ChoiceGroup(java.lang.String label,
                   int type,
                   java.lang.String[] strings,
                   Image[] images)

Create a new list specifying the contents of the list

Parameters:

label - The label

type - The list type

strings - The strings to display

images - The images to display

Throws:

NullPointerException - if strings is null

NullPointerException - if any of the strings is null

IllegalArgumentsException - if the images array is not null and has a different length from the strings array

IllegalArgumentException - if the type is not IMPLICIT, EXCLUSIVE or MULTIPLE

IllegalArgumentException - if any image is multable

Method Detail

append

public int append(java.lang.String string,
                  Image image)

Append an element to the choice

Specified by:

append in interface Choice

Parameters:

string - The string part to append

image - The image part to append

Returns:

the index of the element

Throws:

IllegalArgumentException - if the image is mutable

NullPointerException - if the string is null

delete

public void delete(int pos)

Delete the element at the specified position

Specified by:

delete in interface Choice

Parameters:

pos - The position

Throws:

IndexOutOfBoundsException - if the element is invalid

getImage

public Image getImage(int pos)

Get the image at the position

Specified by:

getImage in interface Choice

Parameters:

pos - The position

Returns:

the image

Throws:

IndexOutOfBoundsException - if the element is invalid

getSelectedFlags

public int getSelectedFlags(boolean[] array)

Return the state of all the selections

Specified by:

getSelectedFlags in interface Choice

Returns:

the number of elements

Throws:

IllegalArgumentException - if the array is too short

NullPointerException - if the array is null

getSelectedIndex

public int getSelectedIndex()

Return the selected items index

Specified by:

getSelectedIndex in interface Choice

Returns:

the index or -1 if nothing is selected

getString

public java.lang.String getString(int pos)

Get the string part of the element at the posiotion

Specified by:

getString in interface Choice

Parameters:

pos - The position

Returns:

the string part

Throws:

IndexOutOfBoundsException - if the element is invalid

insert

public void insert(int pos,
                   java.lang.String string,
                   Image image)

Insert a new value before the specified element. The size grows shifing all the other values up

Specified by:

insert in interface Choice

Parameters:

pos - The position to insert in. The current item at that location is moved up

string - The string part to display

image - The image part

Throws:

IndexOutOfBoundsException - if the element is invalid

IllegalArgumentException - if the image is mutable

NullPointerException - if the string is null

isSelected

public boolean isSelected(int pos)

Return true if the item at the position is selected

Specified by:

isSelected in interface Choice

Parameters:

pos - The position

Returns:

true if it is, false otherwise

Throws:

IndexOutOfBoundsException - if the element is invalid

set

public void set(int pos,
                java.lang.String string,
                Image image)

Set the element at the specified position to the new string and image

Specified by:

set in interface Choice

Parameters:

pos - The position to set

string - The string part to display

image - The image part

Throws:

IndexOutOfBoundsException - if the element is invalid

IllegalArgumentException - if the image is mutable

NullPointerException - if the string is null

setSelectedFlags

public void setSelectedFlags(boolean[] flags)

Set the selected state of every element

Specified by:

setSelectedFlags in interface Choice

Parameters:

flags - The boolean array containing the selected states

Throws:

IllegalArgumentException - if the array is too short

NullPointerException - if the array is null

setSelectedIndex

public void setSelectedIndex(int pos,
                             boolean selected)

Set the selection state of the item at the specified position

Specified by:

setSelectedIndex in interface Choice

Parameters:

pos - The position

selected - True if it is selected, false otherwise

Throws:

IndexOutOfBoundsException - if the element is invalid

size

public int size()

Get the size of the choice

Specified by:

size in interface Choice

Returns:

the size