javax.swing.plaf.basic
Class BasicListUI.HomeAction

java.lang.Object
  extended byjavax.swing.AbstractAction
      extended byjavax.swing.plaf.basic.BasicListUI.IncrementLeadSelectionAction
          extended byjavax.swing.plaf.basic.BasicListUI.HomeAction
All Implemented Interfaces:
Action, ActionListener, Cloneable, EventListener, Serializable
Enclosing class:
BasicListUI

private static class BasicListUI.HomeAction
extends BasicListUI.IncrementLeadSelectionAction

Action to move the selection to the first item in the list.


Nested Class Summary
 
Nested classes inherited from class javax.swing.AbstractAction
 
Field Summary
protected  int amount
          Amount to offset, subclasses will define what this means.
protected  int selectionType
          One of CHANGE_LEAD, CHANGE_SELECTION or EXTEND_SELECTION.
 
Fields inherited from class javax.swing.AbstractAction
changeSupport, enabled
 
Fields inherited from interface javax.swing.Action
ACCELERATOR_KEY, ACTION_COMMAND_KEY, DEFAULT, LONG_DESCRIPTION, MNEMONIC_KEY, NAME, SHORT_DESCRIPTION, SMALL_ICON
 
Constructor Summary
protected BasicListUI.HomeAction(String name, int type)
           
 
Method Summary
 void actionPerformed(ActionEvent e)
          Invokes getNextIndex to determine the next index to select.
protected  void ensureIndexIsVisible(JList list, int index)
          Ensures the particular index is visible.
protected  int getAmount(JList list)
          Returns the amount to increment by.
protected  int getNextIndex(JList list)
          Returns the next index to select.
 
Methods inherited from class javax.swing.AbstractAction
addPropertyChangeListener, clone, firePropertyChange, getKeys, getPropertyChangeListeners, getValue, isEnabled, putValue, removePropertyChangeListener, setEnabled
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

amount

protected int amount
Amount to offset, subclasses will define what this means.


selectionType

protected int selectionType
One of CHANGE_LEAD, CHANGE_SELECTION or EXTEND_SELECTION.

Constructor Detail

BasicListUI.HomeAction

protected BasicListUI.HomeAction(String name,
                                 int type)
Method Detail

getNextIndex

protected int getNextIndex(JList list)
Description copied from class: BasicListUI.IncrementLeadSelectionAction
Returns the next index to select. This is based on the lead selected index and the amount ivar.

Overrides:
getNextIndex in class BasicListUI.IncrementLeadSelectionAction

getAmount

protected int getAmount(JList list)
Returns the amount to increment by.


ensureIndexIsVisible

protected void ensureIndexIsVisible(JList list,
                                    int index)
Ensures the particular index is visible. This simply forwards the method to list.


actionPerformed

public void actionPerformed(ActionEvent e)
Invokes getNextIndex to determine the next index to select. If the index is valid (not -1 and < size of the model), this will either: move the selection to the new index if the selectionType == CHANGE_SELECTION, move the lead to the new index if selectionType == CHANGE_LEAD, otherwise the selection is extend from the anchor to the new index and the lead is set to the new index.