- java.lang.Object
-
- javax.swing.DefaultListSelectionModel
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- All Implemented Interfaces:
- Serializable, Cloneable, ListSelectionModel
public class DefaultListSelectionModel extends Object implements ListSelectionModel, Cloneable, Serializable
Default data model for list selections.Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeansTM has been added to the
java.beans
package. Please seeXMLEncoder
.- See Also:
ListSelectionModel
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Field Summary
Fields Modifier and Type Field and Description protected boolean
leadAnchorNotificationEnabled
protected EventListenerList
listenerList
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Fields inherited from interface javax.swing.ListSelectionModel
MULTIPLE_INTERVAL_SELECTION, SINGLE_INTERVAL_SELECTION, SINGLE_SELECTION
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Constructor Summary
Constructors Constructor and Description DefaultListSelectionModel()
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Method Summary
Methods Modifier and Type Method and Description void
addListSelectionListener(ListSelectionListener l)
Add a listener to the list that's notified each time a change to the selection occurs.void
addSelectionInterval(int index0, int index1)
Changes the selection to be the set union of the current selection and the indices betweenindex0
andindex1
inclusive.void
clearSelection()
Change the selection to the empty set.Object
clone()
Returns a clone of this selection model with the same selection.protected void
fireValueChanged(boolean isAdjusting)
Notifies listeners that we have ended a series of adjustments.protected void
fireValueChanged(int firstIndex, int lastIndex)
NotifiesListSelectionListeners
that the value of the selection, in the closed intervalfirstIndex
,lastIndex
, has changed.protected void
fireValueChanged(int firstIndex, int lastIndex, boolean isAdjusting)
int
getAnchorSelectionIndex()
Return the first index argument from the most recent call to setSelectionInterval(), addSelectionInterval() or removeSelectionInterval().int
getLeadSelectionIndex()
Return the second index argument from the most recent call to setSelectionInterval(), addSelectionInterval() or removeSelectionInterval().<T extends EventListener>
T[]getListeners(Class<T> listenerType)
Returns an array of all the objects currently registered asFooListener
s upon this model.ListSelectionListener[]
getListSelectionListeners()
Returns an array of all the list selection listeners registered on thisDefaultListSelectionModel
.int
getMaxSelectionIndex()
Returns the last selected index or -1 if the selection is empty.int
getMinSelectionIndex()
Returns the first selected index or -1 if the selection is empty.int
getSelectionMode()
Returns the current selection mode.boolean
getValueIsAdjusting()
Returnstrue
if the selection is undergoing a series of changes.void
insertIndexInterval(int index, int length, boolean before)
Insert length indices beginning before/after index.boolean
isLeadAnchorNotificationEnabled()
Returns the value of theleadAnchorNotificationEnabled
flag.boolean
isSelectedIndex(int index)
Returns true if the specified index is selected.boolean
isSelectionEmpty()
Returns true if no indices are selected.void
moveLeadSelectionIndex(int leadIndex)
Set the lead selection index, leaving all selection values unchanged.void
removeIndexInterval(int index0, int index1)
Remove the indices in the interval index0,index1 (inclusive) from the selection model.void
removeListSelectionListener(ListSelectionListener l)
Remove a listener from the list that's notified each time a change to the selection occurs.void
removeSelectionInterval(int index0, int index1)
Changes the selection to be the set difference of the current selection and the indices betweenindex0
andindex1
inclusive.void
setAnchorSelectionIndex(int anchorIndex)
Set the anchor selection index, leaving all selection values unchanged.void
setLeadAnchorNotificationEnabled(boolean flag)
Sets the value of the leadAnchorNotificationEnabled flag.void
setLeadSelectionIndex(int leadIndex)
Sets the lead selection index, ensuring that values between the anchor and the new lead are either all selected or all deselected.void
setSelectionInterval(int index0, int index1)
Changes the selection to be betweenindex0
andindex1
inclusive.void
setSelectionMode(int selectionMode)
Sets the selection mode.void
setValueIsAdjusting(boolean isAdjusting)
Sets thevalueIsAdjusting
property, which indicates whether or not upcoming selection changes should be considered part of a single change.String
toString()
Returns a string that displays and identifies this object's properties.
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Field Detail
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listenerList
protected EventListenerList listenerList
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leadAnchorNotificationEnabled
protected boolean leadAnchorNotificationEnabled
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Method Detail
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getMinSelectionIndex
public int getMinSelectionIndex()
Returns the first selected index or -1 if the selection is empty.- Specified by:
getMinSelectionIndex
in interfaceListSelectionModel
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getMaxSelectionIndex
public int getMaxSelectionIndex()
Returns the last selected index or -1 if the selection is empty.- Specified by:
getMaxSelectionIndex
in interfaceListSelectionModel
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getValueIsAdjusting
public boolean getValueIsAdjusting()
Returnstrue
if the selection is undergoing a series of changes.- Specified by:
getValueIsAdjusting
in interfaceListSelectionModel
- Returns:
- true if the selection is undergoing a series of changes
- See Also:
ListSelectionModel.setValueIsAdjusting(boolean)
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getSelectionMode
public int getSelectionMode()
Returns the current selection mode.- Specified by:
getSelectionMode
in interfaceListSelectionModel
- Returns:
- the current selection mode
- See Also:
ListSelectionModel.setSelectionMode(int)
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setSelectionMode
public void setSelectionMode(int selectionMode)
Sets the selection mode. The following list describes the accepted selection modes:ListSelectionModel.SINGLE_SELECTION
- Only one list index can be selected at a time. In this mode,setSelectionInterval
andaddSelectionInterval
are equivalent, both replacing the current selection with the index represented by the second argument (the "lead").ListSelectionModel.SINGLE_INTERVAL_SELECTION
- Only one contiguous interval can be selected at a time. In this mode,addSelectionInterval
behaves likesetSelectionInterval
(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.ListSelectionModel.MULTIPLE_INTERVAL_SELECTION
- In this mode, there's no restriction on what can be selected.
- Specified by:
setSelectionMode
in interfaceListSelectionModel
- Throws:
IllegalArgumentException
- if the selection mode isn't one of those allowed- See Also:
ListSelectionModel.getSelectionMode()
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isSelectedIndex
public boolean isSelectedIndex(int index)
Returns true if the specified index is selected.- Specified by:
isSelectedIndex
in interfaceListSelectionModel
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isSelectionEmpty
public boolean isSelectionEmpty()
Returns true if no indices are selected.- Specified by:
isSelectionEmpty
in interfaceListSelectionModel
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addListSelectionListener
public void addListSelectionListener(ListSelectionListener l)
Add a listener to the list that's notified each time a change to the selection occurs.- Specified by:
addListSelectionListener
in interfaceListSelectionModel
- Parameters:
l
- the ListSelectionListener- See Also:
ListSelectionModel.removeListSelectionListener(javax.swing.event.ListSelectionListener)
,ListSelectionModel.setSelectionInterval(int, int)
,ListSelectionModel.addSelectionInterval(int, int)
,ListSelectionModel.removeSelectionInterval(int, int)
,ListSelectionModel.clearSelection()
,ListSelectionModel.insertIndexInterval(int, int, boolean)
,ListSelectionModel.removeIndexInterval(int, int)
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removeListSelectionListener
public void removeListSelectionListener(ListSelectionListener l)
Remove a listener from the list that's notified each time a change to the selection occurs.- Specified by:
removeListSelectionListener
in interfaceListSelectionModel
- Parameters:
l
- the ListSelectionListener- See Also:
ListSelectionModel.addListSelectionListener(javax.swing.event.ListSelectionListener)
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getListSelectionListeners
public ListSelectionListener[] getListSelectionListeners()
Returns an array of all the list selection listeners registered on thisDefaultListSelectionModel
.- Returns:
- all of this model's
ListSelectionListener
s or an empty array if no list selection listeners are currently registered - Since:
- 1.4
- See Also:
addListSelectionListener(javax.swing.event.ListSelectionListener)
,removeListSelectionListener(javax.swing.event.ListSelectionListener)
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fireValueChanged
protected void fireValueChanged(boolean isAdjusting)
Notifies listeners that we have ended a series of adjustments.
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fireValueChanged
protected void fireValueChanged(int firstIndex, int lastIndex)
NotifiesListSelectionListeners
that the value of the selection, in the closed intervalfirstIndex
,lastIndex
, has changed.
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fireValueChanged
protected void fireValueChanged(int firstIndex, int lastIndex, boolean isAdjusting)
- Parameters:
firstIndex
- the first index in the intervallastIndex
- the last index in the intervalisAdjusting
- true if this is the final change in a series of adjustments- See Also:
EventListenerList
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getListeners
public <T extends EventListener> T[] getListeners(Class<T> listenerType)
Returns an array of all the objects currently registered asFooListener
s upon this model.FooListener
s are registered using theaddFooListener
method.You can specify the
listenerType
argument with a class literal, such asFooListener.class
. For example, you can query aDefaultListSelectionModel
instancem
for its list selection listeners with the following code:ListSelectionListener[] lsls = (ListSelectionListener[])(m.getListeners(ListSelectionListener.class));
If no such listeners exist, this method returns an empty array.- Parameters:
listenerType
- the type of listeners requested; this parameter should specify an interface that descends fromjava.util.EventListener
- Returns:
- an array of all objects registered as
FooListener
s on this model, or an empty array if no such listeners have been added - Throws:
ClassCastException
- iflistenerType
doesn't specify a class or interface that implementsjava.util.EventListener
- Since:
- 1.3
- See Also:
getListSelectionListeners()
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setLeadAnchorNotificationEnabled
public void setLeadAnchorNotificationEnabled(boolean flag)
Sets the value of the leadAnchorNotificationEnabled flag.- See Also:
isLeadAnchorNotificationEnabled()
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isLeadAnchorNotificationEnabled
public boolean isLeadAnchorNotificationEnabled()
Returns the value of theleadAnchorNotificationEnabled
flag. WhenleadAnchorNotificationEnabled
is true the model generates notification events with bounds that cover all the changes to the selection plus the changes to the lead and anchor indices. Setting the flag to false causes a narrowing of the event's bounds to include only the elements that have been selected or deselected since the last change. Either way, the model continues to maintain the lead and anchor variables internally. The default is true.Note: It is possible for the lead or anchor to be changed without a change to the selection. Notification of these changes is often important, such as when the new lead or anchor needs to be updated in the view. Therefore, caution is urged when changing the default value.
- Returns:
- the value of the
leadAnchorNotificationEnabled
flag - See Also:
setLeadAnchorNotificationEnabled(boolean)
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clearSelection
public void clearSelection()
Change the selection to the empty set. If this represents a change to the current selection then notify each ListSelectionListener.- Specified by:
clearSelection
in interfaceListSelectionModel
- See Also:
ListSelectionModel.addListSelectionListener(javax.swing.event.ListSelectionListener)
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setSelectionInterval
public void setSelectionInterval(int index0, int index1)
Changes the selection to be betweenindex0
andindex1
inclusive.index0
doesn't have to be less than or equal toindex1
.In
SINGLE_SELECTION
selection mode, only the second index is used.If this represents a change to the current selection, then each
ListSelectionListener
is notified of the change.If either index is
-1
, this method does nothing and returns without exception. Otherwise, if either index is less than-1
, anIndexOutOfBoundsException
is thrown.- Specified by:
setSelectionInterval
in interfaceListSelectionModel
- Parameters:
index0
- one end of the interval.index1
- other end of the interval- Throws:
IndexOutOfBoundsException
- if either index is less than-1
(and neither index is-1
)- See Also:
addListSelectionListener(javax.swing.event.ListSelectionListener)
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addSelectionInterval
public void addSelectionInterval(int index0, int index1)
Changes the selection to be the set union of the current selection and the indices betweenindex0
andindex1
inclusive.In
SINGLE_SELECTION
selection mode, this is equivalent to callingsetSelectionInterval
, and only the second index is used. InSINGLE_INTERVAL_SELECTION
selection mode, this method behaves likesetSelectionInterval
, unless the given interval is immediately adjacent to or overlaps the existing selection, and can therefore be used to grow it.If this represents a change to the current selection, then each
ListSelectionListener
is notified of the change. Note thatindex0
doesn't have to be less than or equal toindex1
.If either index is
-1
, this method does nothing and returns without exception. Otherwise, if either index is less than-1
, anIndexOutOfBoundsException
is thrown.- Specified by:
addSelectionInterval
in interfaceListSelectionModel
- Parameters:
index0
- one end of the interval.index1
- other end of the interval- Throws:
IndexOutOfBoundsException
- if either index is less than-1
(and neither index is-1
)- See Also:
addListSelectionListener(javax.swing.event.ListSelectionListener)
,setSelectionInterval(int, int)
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removeSelectionInterval
public void removeSelectionInterval(int index0, int index1)
Changes the selection to be the set difference of the current selection and the indices betweenindex0
andindex1
inclusive.index0
doesn't have to be less than or equal toindex1
.In
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 is0-10
and you supply indices5,6
(in any order) the resulting selection is0-4
.If this represents a change to the current selection, then each
ListSelectionListener
is notified of the change.If either index is
-1
, this method does nothing and returns without exception. Otherwise, if either index is less than-1
, anIndexOutOfBoundsException
is thrown.- Specified by:
removeSelectionInterval
in interfaceListSelectionModel
- Parameters:
index0
- one end of the intervalindex1
- other end of the interval- Throws:
IndexOutOfBoundsException
- if either index is less than-1
(and neither index is-1
)- See Also:
addListSelectionListener(javax.swing.event.ListSelectionListener)
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insertIndexInterval
public void insertIndexInterval(int index, int length, boolean before)
Insert length indices beginning before/after index. If the value at index is itself selected and the selection mode is not SINGLE_SELECTION, set all of the newly inserted items as selected. Otherwise leave them unselected. This method is typically called to sync the selection model with a corresponding change in the data model.- Specified by:
insertIndexInterval
in interfaceListSelectionModel
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removeIndexInterval
public void removeIndexInterval(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. Note that (as always) index0 need not be <= index1.- Specified by:
removeIndexInterval
in interfaceListSelectionModel
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setValueIsAdjusting
public void setValueIsAdjusting(boolean isAdjusting)
Sets thevalueIsAdjusting
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 thevalueIsAdjusting
property of theListSelectionEvent
s that are generated.For example, if the selection is being updated in response to a user drag, this property can be set to
true
when the drag is initiated and set tofalse
when the drag is finished. During the drag, listeners receive events with avalueIsAdjusting
property set totrue
. At the end of the drag, when the change is finalized, listeners receive an event with the value set tofalse
. Listeners can use this pattern if they wish to update only when a change has been finalized.Setting this property to
true
begins a series of changes that is to be considered part of a single change. When the property is changed back tofalse
, an event is sent out characterizing the entire selection change (if there was one), with the event'svalueIsAdjusting
property set tofalse
.- Specified by:
setValueIsAdjusting
in interfaceListSelectionModel
- Parameters:
isAdjusting
- the new value of the property- See Also:
ListSelectionModel.getValueIsAdjusting()
,ListSelectionEvent.getValueIsAdjusting()
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toString
public String toString()
Returns a string that displays and identifies this object's properties.
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clone
public Object clone() throws CloneNotSupportedException
Returns a clone of this selection model with the same selection.listenerLists
are not duplicated.- Overrides:
clone
in classObject
- Returns:
- a clone of this instance.
- Throws:
CloneNotSupportedException
- if the selection model does not both (a) implement the Cloneable interface and (b) define aclone
method.- See Also:
Cloneable
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getAnchorSelectionIndex
public int getAnchorSelectionIndex()
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.
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getLeadSelectionIndex
public int getLeadSelectionIndex()
Return the second index argument from the most recent call to setSelectionInterval(), addSelectionInterval() or removeSelectionInterval().
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setAnchorSelectionIndex
public void setAnchorSelectionIndex(int anchorIndex)
Set the anchor selection index, leaving all selection values unchanged. If leadAnchorNotificationEnabled is true, send a notification covering the old and new anchor cells.- Specified by:
setAnchorSelectionIndex
in interfaceListSelectionModel
- See Also:
getAnchorSelectionIndex()
,setLeadSelectionIndex(int)
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moveLeadSelectionIndex
public void moveLeadSelectionIndex(int leadIndex)
Set the lead selection index, leaving all selection values unchanged. If leadAnchorNotificationEnabled is true, send a notification covering the old and new lead cells.- Parameters:
leadIndex
- the new lead selection index- Since:
- 1.5
- See Also:
setAnchorSelectionIndex(int)
,setLeadSelectionIndex(int)
,getLeadSelectionIndex()
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setLeadSelectionIndex
public void setLeadSelectionIndex(int leadIndex)
Sets the lead selection index, ensuring that values between the anchor and the new lead are either all selected or all deselected. If the value at the anchor index is selected, first clear all the values in the range [anchor, oldLeadIndex], then select all the values values in the range [anchor, newLeadIndex], where oldLeadIndex is the old leadIndex and newLeadIndex is the new one.If the value at the anchor index is not selected, do the same thing in reverse selecting values in the old range and deslecting values in the new one.
Generate a single event for this change and notify all listeners. For the purposes of generating minimal bounds in this event, do the operation in a single pass; that way the first and last index inside the ListSelectionEvent that is broadcast will refer to cells that actually changed value because of this method. If, instead, this operation were done in two steps the effect on the selection state would be the same but two events would be generated and the bounds around the changed values would be wider, including cells that had been first cleared only to later be set.
This method can be used in the
mouseDragged
method of a UI class to extend a selection.- Specified by:
setLeadSelectionIndex
in interfaceListSelectionModel
- See Also:
getLeadSelectionIndex()
,setAnchorSelectionIndex(int)
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