uk.ac.starlink.util.gui

Class ValueButtonGroup<T>

java.lang.Object

javax.swing.ButtonGroup

uk.ac.starlink.util.gui.ValueButtonGroup<T>

All Implemented Interfaces:

Serializable

public class ValueButtonGroup<T>
extends ButtonGroup

Extends ButtonGroup by associating a value with each button.

Since:

11 Jan 2005

Author:

Mark Taylor

See Also:

Serialized Form

Field Summary

Fields inherited from class javax.swing.ButtonGroup

buttons

Constructor Summary

Constructors

Constructor and Description
ValueButtonGroup() Constructor.

Method Summary

Modifier and Type	Method and Description
void	add(AbstractButton button, T value) Adds a button and associates a value with it.
void	addChangeListener(ChangeListener listener) Adds a listener which will be notified whenever this group's selected value changes.
T	getValue() Returns the currently selected value, that is the value associated with the currently selected button.
void	remove(AbstractButton button)
void	removeChangeListener(ChangeListener listener) Removes a listener previously added by addChangeListener.
void	setValue(T value) Sets the currently selected value.

Methods inherited from class javax.swing.ButtonGroup

add, clearSelection, getButtonCount, getElements, getSelection, isSelected, setSelected

Methods inherited from class java.lang.Object

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

Constructor Detail

ValueButtonGroup

public ValueButtonGroup()

Constructor.

Method Detail

add

public void add(AbstractButton button,
                T value)

Adds a button and associates a value with it. When button is selected, getValue() will return value. You can use null for a value, but don't have two buttons with associated values which are equal.

Parameters:

button - button

value - associated value

remove

public void remove(AbstractButton button)

Overrides:

remove in class ButtonGroup

getValue

public T getValue()

Returns the currently selected value, that is the value associated with the currently selected button.

Returns:

selected value

setValue

public void setValue(T value)

Sets the currently selected value. The associated button will be selected (and others deselected). value must be one of the values associated with a button in this group.

Parameters:

value - new value

addChangeListener

public void addChangeListener(ChangeListener listener)

Adds a listener which will be notified whenever this group's selected value changes.

Parameters:

listener - listener to add

removeChangeListener

public void removeChangeListener(ChangeListener listener)

Removes a listener previously added by addChangeListener.

Parameters:

listener - listener to remove