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- All Known Implementing Classes:
- DefaultListSelectionModel
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.- See Also:
DefaultListSelectionModel
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Field Summary
Fields Modifier and Type Field and Description static int
MULTIPLE_INTERVAL_SELECTION
A value for the selectionMode property: select one or more contiguous ranges of indices at a time.static int
SINGLE_INTERVAL_SELECTION
A value for the selectionMode property: select one contiguous range of indices at a time.static int
SINGLE_SELECTION
A value for the selectionMode property: select one list index at a time.
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Method Summary
Methods Modifier and Type Method and Description void
addListSelectionListener(ListSelectionListener x)
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.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().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
isSelectedIndex(int index)
Returns true if the specified index is selected.boolean
isSelectionEmpty()
Returns true if no indices are selected.void
removeIndexInterval(int index0, int index1)
Remove the indices in the interval index0,index1 (inclusive) from the selection model.void
removeListSelectionListener(ListSelectionListener x)
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 index)
Set the anchor selection index.void
setLeadSelectionIndex(int index)
Set the lead selection index.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 valueIsAdjusting)
Sets thevalueIsAdjusting
property, which indicates whether or not upcoming selection changes should be considered part of a single change.
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Field Detail
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SINGLE_SELECTION
static final int SINGLE_SELECTION
A value for the selectionMode property: select one list index at a time.- See Also:
setSelectionMode(int)
, Constant Field Values
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SINGLE_INTERVAL_SELECTION
static final int SINGLE_INTERVAL_SELECTION
A value for the selectionMode property: select one contiguous range of indices at a time.- See Also:
setSelectionMode(int)
, Constant Field Values
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MULTIPLE_INTERVAL_SELECTION
static final int MULTIPLE_INTERVAL_SELECTION
A value for the selectionMode property: select one or more contiguous ranges of indices at a time.- See Also:
setSelectionMode(int)
, Constant Field Values
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Method Detail
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setSelectionInterval
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.- Parameters:
index0
- one end of the interval.index1
- other end of the interval- See Also:
addListSelectionListener(javax.swing.event.ListSelectionListener)
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addSelectionInterval
void addSelectionInterval(int index0, int index1)
Changes the selection to be the set union of the current selection and the indices betweenindex0
andindex1
inclusive.index0
doesn't have to be less than or equal toindex1
.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 the selection.If this represents a change to the current selection, then each
ListSelectionListener
is notified of the change.- Parameters:
index0
- one end of the interval.index1
- other end of the interval- See Also:
addListSelectionListener(javax.swing.event.ListSelectionListener)
,setSelectionInterval(int, int)
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removeSelectionInterval
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.- Parameters:
index0
- one end of the interval.index1
- other end of the interval- See Also:
addListSelectionListener(javax.swing.event.ListSelectionListener)
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getMinSelectionIndex
int getMinSelectionIndex()
Returns the first selected index or -1 if the selection is empty.
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getMaxSelectionIndex
int getMaxSelectionIndex()
Returns the last selected index or -1 if the selection is empty.
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isSelectedIndex
boolean isSelectedIndex(int index)
Returns true if the specified index is selected.
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getAnchorSelectionIndex
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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setAnchorSelectionIndex
void setAnchorSelectionIndex(int index)
Set the anchor selection index.- See Also:
getAnchorSelectionIndex()
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getLeadSelectionIndex
int getLeadSelectionIndex()
Return the second index argument from the most recent call to setSelectionInterval(), addSelectionInterval() or removeSelectionInterval().
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setLeadSelectionIndex
void setLeadSelectionIndex(int index)
Set the lead selection index.- See Also:
getLeadSelectionIndex()
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clearSelection
void clearSelection()
Change the selection to the empty set. If this represents a change to the current selection then notify each ListSelectionListener.
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isSelectionEmpty
boolean isSelectionEmpty()
Returns true if no indices are selected.
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insertIndexInterval
void insertIndexInterval(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.
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removeIndexInterval
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.
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setValueIsAdjusting
void setValueIsAdjusting(boolean valueIsAdjusting)
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
.- Parameters:
valueIsAdjusting
- the new value of the property- See Also:
getValueIsAdjusting()
,ListSelectionEvent.getValueIsAdjusting()
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getValueIsAdjusting
boolean getValueIsAdjusting()
Returnstrue
if the selection is undergoing a series of changes.- Returns:
- true if the selection is undergoing a series of changes
- See Also:
setValueIsAdjusting(boolean)
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setSelectionMode
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.
- Throws:
IllegalArgumentException
- if the selection mode isn't one of those allowed- See Also:
getSelectionMode()
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getSelectionMode
int getSelectionMode()
Returns the current selection mode.- Returns:
- the current selection mode
- See Also:
setSelectionMode(int)
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addListSelectionListener
void addListSelectionListener(ListSelectionListener x)
Add a listener to the list that's notified each time a change to the selection occurs.- Parameters:
x
- the ListSelectionListener- See Also:
removeListSelectionListener(javax.swing.event.ListSelectionListener)
,setSelectionInterval(int, int)
,addSelectionInterval(int, int)
,removeSelectionInterval(int, int)
,clearSelection()
,insertIndexInterval(int, int, boolean)
,removeIndexInterval(int, int)
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removeListSelectionListener
void removeListSelectionListener(ListSelectionListener x)
Remove a listener from the list that's notified each time a change to the selection occurs.- Parameters:
x
- the ListSelectionListener- See Also:
addListSelectionListener(javax.swing.event.ListSelectionListener)
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