FileDocCategorySizeDatePackage
ListSelectionModel.javaAPI DocJava SE 6 API10404Tue Jun 10 00:26:40 BST 2008javax.swing

ListSelectionModel

public interface ListSelectionModel
This interface represents the current state of the selection for any of the components that display a list of values with stable indices. The selection is modeled as a set of intervals, each interval represents a contiguous range of selected list elements. The methods for modifying the set of selected intervals all take a pair of indices, index0 and index1, that represent a closed interval, i.e. the interval includes both index0 and index1.
version
1.23 07/11/06
author
Hans Muller
author
Philip Milne
see
DefaultListSelectionModel

Fields Summary
int
SINGLE_SELECTION
A value for the selectionMode property: select one list index at a time.
int
SINGLE_INTERVAL_SELECTION
A value for the selectionMode property: select one contiguous range of indices at a time.
int
MULTIPLE_INTERVAL_SELECTION
A value for the selectionMode property: select one or more contiguous ranges of indices at a time.
Constructors Summary
Methods Summary
public voidaddListSelectionListener(javax.swing.event.ListSelectionListener x)
Add a listener to the list that's notified each time a change to the selection occurs.

param
x the ListSelectionListener
see
#removeListSelectionListener
see
#setSelectionInterval
see
#addSelectionInterval
see
#removeSelectionInterval
see
#clearSelection
see
#insertIndexInterval
see
#removeIndexInterval

public voidaddSelectionInterval(int index0, int index1)
Changes the selection to be the set union of the current selection and the indices between {@code index0} and {@code index1} inclusive. {@code index0} doesn't have to be less than or equal to {@code index1}.

In {@code SINGLE_SELECTION} selection mode, this is equivalent to calling {@code setSelectionInterval}, and only the second index is used. In {@code SINGLE_INTERVAL_SELECTION} selection mode, this method behaves like {@code setSelectionInterval}, unless the given interval is immediately adjacent to or overlaps the existing selection, and can therefore be used to grow the selection.

If this represents a change to the current selection, then each {@code ListSelectionListener} is notified of the change.

param
index0 one end of the interval.
param
index1 other end of the interval
see
#addListSelectionListener
see
#setSelectionInterval

public voidclearSelection()
Change the selection to the empty set. If this represents a change to the current selection then notify each ListSelectionListener.

see
#addListSelectionListener

public intgetAnchorSelectionIndex()
Return the first index argument from the most recent call to setSelectionInterval(), addSelectionInterval() or removeSelectionInterval(). The most recent index0 is considered the "anchor" and the most recent index1 is considered the "lead". Some interfaces display these indices specially, e.g. Windows95 displays the lead index with a dotted yellow outline.

see
#getLeadSelectionIndex
see
#setSelectionInterval
see
#addSelectionInterval

public intgetLeadSelectionIndex()
Return the second index argument from the most recent call to setSelectionInterval(), addSelectionInterval() or removeSelectionInterval().

see
#getAnchorSelectionIndex
see
#setSelectionInterval
see
#addSelectionInterval

public intgetMaxSelectionIndex()
Returns the last selected index or -1 if the selection is empty.

public intgetMinSelectionIndex()
Returns the first selected index or -1 if the selection is empty.

public intgetSelectionMode()
Returns the current selection mode.

return
the current selection mode
see
#setSelectionMode

public booleangetValueIsAdjusting()
Returns {@code true} if the selection is undergoing a series of changes.

return
true if the selection is undergoing a series of changes
see
#setValueIsAdjusting

public voidinsertIndexInterval(int index, int length, boolean before)
Insert length indices beginning before/after index. This is typically called to sync the selection model with a corresponding change in the data model.

public booleanisSelectedIndex(int index)
Returns true if the specified index is selected.

public booleanisSelectionEmpty()
Returns true if no indices are selected.

public voidremoveIndexInterval(int index0, int index1)
Remove the indices in the interval index0,index1 (inclusive) from the selection model. This is typically called to sync the selection model width a corresponding change in the data model.

public voidremoveListSelectionListener(javax.swing.event.ListSelectionListener x)
Remove a listener from the list that's notified each time a change to the selection occurs.

param
x the ListSelectionListener
see
#addListSelectionListener

public voidremoveSelectionInterval(int index0, int index1)
Changes the selection to be the set difference of the current selection and the indices between {@code index0} and {@code index1} inclusive. {@code index0} doesn't have to be less than or equal to {@code index1}.

In {@code SINGLE_INTERVAL_SELECTION} selection mode, if the removal would produce two disjoint selections, the removal is extended through the greater end of the selection. For example, if the selection is {@code 0-10} and you supply indices {@code 5,6} (in any order) the resulting selection is {@code 0-4}.

If this represents a change to the current selection, then each {@code ListSelectionListener} is notified of the change.

param
index0 one end of the interval.
param
index1 other end of the interval
see
#addListSelectionListener

public voidsetAnchorSelectionIndex(int index)
Set the anchor selection index.

see
#getAnchorSelectionIndex

public voidsetLeadSelectionIndex(int index)
Set the lead selection index.

see
#getLeadSelectionIndex

public voidsetSelectionInterval(int index0, int index1)
Changes the selection to be between {@code index0} and {@code index1} inclusive. {@code index0} doesn't have to be less than or equal to {@code index1}.

In {@code SINGLE_SELECTION} selection mode, only the second index is used.

If this represents a change to the current selection, then each {@code ListSelectionListener} is notified of the change.

param
index0 one end of the interval.
param
index1 other end of the interval
see
#addListSelectionListener

public voidsetSelectionMode(int selectionMode)
Sets the selection mode. The following list describes the accepted selection modes:
  • {@code ListSelectionModel.SINGLE_SELECTION} - Only one list index can be selected at a time. In this mode, {@code setSelectionInterval} and {@code addSelectionInterval} are equivalent, both replacing the current selection with the index represented by the second argument (the "lead").
  • {@code ListSelectionModel.SINGLE_INTERVAL_SELECTION} - Only one contiguous interval can be selected at a time. In this mode, {@code addSelectionInterval} behaves like {@code setSelectionInterval} (replacing the current selection), unless the given interval is immediately adjacent to or overlaps the existing selection, and can therefore be used to grow it.
  • {@code ListSelectionModel.MULTIPLE_INTERVAL_SELECTION} - In this mode, there's no restriction on what can be selected.

see
#getSelectionMode
throws
IllegalArgumentException if the selection mode isn't one of those allowed

public voidsetValueIsAdjusting(boolean valueIsAdjusting)
Sets the {@code valueIsAdjusting} property, which indicates whether or not upcoming selection changes should be considered part of a single change. The value of this property is used to initialize the {@code valueIsAdjusting} property of the {@code ListSelectionEvent}s that are generated.

For example, if the selection is being updated in response to a user drag, this property can be set to {@code true} when the drag is initiated and set to {@code false} when the drag is finished. During the drag, listeners receive events with a {@code valueIsAdjusting} property set to {@code true}. At the end of the drag, when the change is finalized, listeners receive an event with the value set to {@code false}. Listeners can use this pattern if they wish to update only when a change has been finalized.

Setting this property to {@code true} begins a series of changes that is to be considered part of a single change. When the property is changed back to {@code false}, an event is sent out characterizing the entire selection change (if there was one), with the event's {@code valueIsAdjusting} property set to {@code false}.

param
valueIsAdjusting the new value of the property
see
#getValueIsAdjusting
see
javax.swing.event.ListSelectionEvent#getValueIsAdjusting