/*
* @(#)ListSelectionModel.java 1.23 06/07/11
*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package javax.swing;
import javax.swing.event.*;
/**
* 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
*/
public interface ListSelectionModel
{
/**
* A value for the selectionMode property: select one list index
* at a time.
*
* @see #setSelectionMode
*/
int SINGLE_SELECTION = 0;
/**
* A value for the selectionMode property: select one contiguous
* range of indices at a time.
*
* @see #setSelectionMode
*/
int SINGLE_INTERVAL_SELECTION = 1;
/**
* A value for the selectionMode property: select one or more
* contiguous ranges of indices at a time.
*
* @see #setSelectionMode
*/
int MULTIPLE_INTERVAL_SELECTION = 2;
/**
* 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}.
* <p>
* In {@code SINGLE_SELECTION} selection mode, only the second index
* is used.
* <p>
* 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
*/
void setSelectionInterval(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}.
* <p>
* 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.
* <p>
* 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
*/
void addSelectionInterval(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}.
* <p>
* 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}.
* <p>
* 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
*/
void removeSelectionInterval(int index0, int index1);
/**
* Returns the first selected index or -1 if the selection is empty.
*/
int getMinSelectionIndex();
/**
* Returns the last selected index or -1 if the selection is empty.
*/
int getMaxSelectionIndex();
/**
* Returns true if the specified index is selected.
*/
boolean isSelectedIndex(int index);
/**
* 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
*/
int getAnchorSelectionIndex();
/**
* Set the anchor selection index.
*
* @see #getAnchorSelectionIndex
*/
void setAnchorSelectionIndex(int index);
/**
* Return the second index argument from the most recent call to
* setSelectionInterval(), addSelectionInterval() or removeSelectionInterval().
*
* @see #getAnchorSelectionIndex
* @see #setSelectionInterval
* @see #addSelectionInterval
*/
int getLeadSelectionIndex();
/**
* Set the lead selection index.
*
* @see #getLeadSelectionIndex
*/
void setLeadSelectionIndex(int index);
/**
* Change the selection to the empty set. If this represents
* a change to the current selection then notify each ListSelectionListener.
*
* @see #addListSelectionListener
*/
void clearSelection();
/**
* Returns true if no indices are selected.
*/
boolean isSelectionEmpty();
/**
* Insert length indices beginning before/after index. This is typically
* called to sync the selection model with a corresponding change
* in the data model.
*/
void insertIndexInterval(int index, int length, boolean before);
/**
* 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.
*/
void removeIndexInterval(int index0, int index1);
/**
* 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.
* <p>
* 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.
* <p>
* 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
*/
void setValueIsAdjusting(boolean valueIsAdjusting);
/**
* 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
*/
boolean getValueIsAdjusting();
/**
* Sets the selection mode. The following list describes the accepted
* selection modes:
* <ul>
* <li>{@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").
* <li>{@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.
* <li>{@code ListSelectionModel.MULTIPLE_INTERVAL_SELECTION} -
* In this mode, there's no restriction on what can be selected.
* </ul>
*
* @see #getSelectionMode
* @throws IllegalArgumentException if the selection mode isn't
* one of those allowed
*/
void setSelectionMode(int selectionMode);
/**
* Returns the current selection mode.
*
* @return the current selection mode
* @see #setSelectionMode
*/
int getSelectionMode();
/**
* 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
*/
void addListSelectionListener(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
*/
void removeListSelectionListener(ListSelectionListener x);
}
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