echopoint.model
Class DefaultSingleSelectionModel

java.lang.Object
  echopoint.model.DefaultSingleSelectionModel

All Implemented Interfaces:

SingleSelectionModel, java.io.Serializable

public class DefaultSingleSelectionModel
extends java.lang.Object
implements SingleSelectionModel, java.io.Serializable

A generic implementation of SingleSelectionModel.

This class will perform an optimisation check when the selected index is set and will only fire a ChangeEvent if the index actually changes from the previous value.

See Also:

Serialized Form

Field Summary

protected ChangeEvent	changeEvent Only one ChangeEvent is needed per model instance since the event's only (read-only) state is the source property.
protected EventListenerList	listenerList

Constructor Summary

DefaultSingleSelectionModel()
Initializes selectedIndex to -1

DefaultSingleSelectionModel(int index)
Initializes selectedIndex to index

Method Summary

void	addChangeListener(ChangeListener l) Adds listener as a listener to changes in the model.
void	clearSelection() Clears the selection (to -1).
void	fireStateChanged() Notifies all listeners that have registered for this event type.
int	getSelectedIndex() Returns the model's selection.
boolean	isSelected() Returns true if the selection model currently has a selected value.
void	removeChangeListener(ChangeListener l) Removes listener as a listener to changes in the model.
void	setSelectedIndex(int index) Sets the model's selected index to index.

Methods inherited from class java.lang.Object

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

Field Detail

changeEvent

protected transient ChangeEvent changeEvent

Only one ChangeEvent is needed per model instance since the event's only (read-only) state is the source property. The source of events generated here is always "this".

listenerList

protected EventListenerList listenerList

Constructor Detail

DefaultSingleSelectionModel

public DefaultSingleSelectionModel()

Initializes selectedIndex to -1

DefaultSingleSelectionModel

public DefaultSingleSelectionModel(int index)

Initializes selectedIndex to index

Method Detail

addChangeListener

public void addChangeListener(ChangeListener l)

Description copied from interface: SingleSelectionModel

Adds listener as a listener to changes in the model.

Specified by:

addChangeListener in interface SingleSelectionModel

Parameters:

l - the ChangeListener to add

See Also:

SingleSelectionModel.addChangeListener(nextapp.echo.event.ChangeListener)

clearSelection

public void clearSelection()

Description copied from interface: SingleSelectionModel

Clears the selection (to -1).

Specified by:

clearSelection in interface SingleSelectionModel

See Also:

SingleSelectionModel.clearSelection()

fireStateChanged

public void fireStateChanged()

Notifies all listeners that have registered for this event type.

getSelectedIndex

public int getSelectedIndex()

Description copied from interface: SingleSelectionModel

Returns the model's selection.

Specified by:

getSelectedIndex in interface SingleSelectionModel

Returns:

the model's selection, or -1 if there is no selection

See Also:

SingleSelectionModel.getSelectedIndex()

isSelected

public boolean isSelected()

Description copied from interface: SingleSelectionModel

Returns true if the selection model currently has a selected value.

Specified by:

isSelected in interface SingleSelectionModel

Returns:

true if a value is currently selected

See Also:

SingleSelectionModel.isSelected()

removeChangeListener

public void removeChangeListener(ChangeListener l)

Description copied from interface: SingleSelectionModel

Removes listener as a listener to changes in the model.

Specified by:

removeChangeListener in interface SingleSelectionModel

Parameters:

l - the ChangeListener to remove

See Also:

SingleSelectionModel.removeChangeListener(nextapp.echo.event.ChangeListener)

setSelectedIndex

public void setSelectedIndex(int index)

Description copied from interface: SingleSelectionModel

Sets the model's selected index to index.
Notifies any listeners if the model changes

Specified by:

setSelectedIndex in interface SingleSelectionModel

See Also:

SingleSelectionModel.setSelectedIndex(int)