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jeremybenn |
/* DefaultListSelectionModel.java --
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Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.swing;
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import java.io.Serializable;
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import java.util.BitSet;
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import java.util.EventListener;
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import javax.swing.event.EventListenerList;
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import javax.swing.event.ListSelectionEvent;
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import javax.swing.event.ListSelectionListener;
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/**
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* The default implementation of {@link ListSelectionModel},
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* which is used by {@link javax.swing.JList} and
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* similar classes to manage the selection status of a number of data
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* elements.
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*
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* <p>The class is organized <em>abstractly</em> as a set of intervals of
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* integers. Each interval indicates an inclusive range of indices in a
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* list -- held by some other object and unknown to this class -- which is
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* considered "selected". There are various accessors for querying and
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* modifying the set of intervals, with simplified forms accepting a single
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* index, representing an interval with only one element. </p>
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*/
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public class DefaultListSelectionModel implements Cloneable,
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ListSelectionModel,
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Serializable
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{
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private static final long serialVersionUID = -5718799865110415860L;
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/** The list of ListSelectionListeners subscribed to this selection model. */
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protected EventListenerList listenerList = new EventListenerList();
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/**
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* The current list selection mode. Must be one of the numeric constants
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* <code>SINGLE_SELECTION</code>, <code>SINGLE_INTERVAL_SELECTION</code>
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* or <code>MULTIPLE_INTERVAL_SELECTION</code> from {@link
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* ListSelectionModel}. The default value is
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* <code>MULTIPLE_INTERVAL_SELECTION</code>.
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*/
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int selectionMode = MULTIPLE_INTERVAL_SELECTION;
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/**
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* The index of the "lead" of the most recent selection. The lead is the
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* second argument in any call to {@link #setSelectionInterval}, {@link
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* #addSelectionInterval} or {@link #removeSelectionInterval}. Generally
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* the lead refers to the most recent position a user dragged their mouse
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* over.
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*/
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int leadSelectionIndex = -1;
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/**
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* The index of the "anchor" of the most recent selection. The anchor is
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* the first argument in any call to {@link #setSelectionInterval},
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* {@link #addSelectionInterval} or {@link
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* #removeSelectionInterval}. Generally the anchor refers to the first
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* recent position a user clicks when they begin to drag their mouse over
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* a list.
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*
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* @see #getAnchorSelectionIndex
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* @see #setAnchorSelectionIndex
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*/
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int anchorSelectionIndex = -1;
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/**
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* controls the range of indices provided in any {@link
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* ListSelectionEvent} fired by the selectionModel. Let
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* <code>[A,L]</code> be the range of indices between {@link
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* #anchorSelectionIndex} and {@link #leadSelectionIndex} inclusive, and
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* let <code>[i0,i1]</code> be the range of indices changed in a given
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* call which generates a {@link ListSelectionEvent}. Then when this
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* property is <code>true</code>, the {@link ListSelectionEvent} contains
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* the range <code>[A,L] union [i0,i1]</code>; when <code>false</code> it
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* will contain only <code>[i0,i1]</code>. The default is
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* <code>true</code>.
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*
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* @see #isLeadAnchorNotificationEnabled
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* @see #setLeadAnchorNotificationEnabled
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*/
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protected boolean leadAnchorNotificationEnabled = true;
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/**
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* Whether the selection is currently "adjusting". Any {@link
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* ListSelectionEvent} events constructed in response to changes in this
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* list selection model will have their {@link
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* ListSelectionEvent#isAdjusting} field set to this value.
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*
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* @see #getValueIsAdjusting
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* @see #setValueIsAdjusting
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*/
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boolean valueIsAdjusting = false;
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/**
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* The current set of "intervals", represented simply by a {@link
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* java.util.BitSet}. A set bit indicates a selected index, whereas a
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* cleared bit indicates a non-selected index.
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*/
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BitSet sel = new BitSet();
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/**
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* A variable to store the previous value of sel.
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* Used to make sure we only fireValueChanged when the BitSet
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* actually does change.
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*/
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Object oldSel;
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/**
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* Whether this call of setLeadSelectionInterval was called locally
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* from addSelectionInterval
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*/
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boolean setLeadCalledFromAdd = false;
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/**
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* Returns the selection mode, which is one of {@link #SINGLE_SELECTION},
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* {@link #SINGLE_INTERVAL_SELECTION} and
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* {@link #MULTIPLE_INTERVAL_SELECTION}. The default value is
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* {@link #MULTIPLE_INTERVAL_SELECTION}.
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*
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* @return The selection mode.
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*
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* @see #setSelectionMode(int)
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*/
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public int getSelectionMode()
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{
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return selectionMode;
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}
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/**
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* Sets the value of the {@link #selectionMode} property.
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*
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* @param mode The new value of the property
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*/
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public void setSelectionMode(int mode)
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{
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if (mode < ListSelectionModel.SINGLE_SELECTION
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|| mode > ListSelectionModel.MULTIPLE_INTERVAL_SELECTION)
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throw new IllegalArgumentException("Unrecognised mode: " + mode);
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selectionMode = mode;
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}
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/**
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* Gets the value of the {@link #anchorSelectionIndex} property.
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*
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* @return The current property value
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*
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* @see #setAnchorSelectionIndex
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*/
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public int getAnchorSelectionIndex()
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{
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return anchorSelectionIndex;
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}
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/**
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* Sets the value of the {@link #anchorSelectionIndex} property.
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*
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* @param index The new property value
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*
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* @see #getAnchorSelectionIndex
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*/
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public void setAnchorSelectionIndex(int index)
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{
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if (anchorSelectionIndex != index)
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{
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int old = anchorSelectionIndex;
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anchorSelectionIndex = index;
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if (leadAnchorNotificationEnabled)
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fireValueChanged(index, old);
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}
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}
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/**
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* Gets the value of the {@link #leadSelectionIndex} property.
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*
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* @return The current property value
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*
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* @see #setLeadSelectionIndex
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*/
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public int getLeadSelectionIndex()
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{
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return leadSelectionIndex;
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}
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/**
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* <p>Sets the value of the {@link #anchorSelectionIndex} property. As a
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* side effect, alters the selection status of two ranges of indices. Let
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* <code>OL</code> be the old lead selection index, <code>NL</code> be
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* the new lead selection index, and <code>A</code> be the anchor
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* selection index. Then if <code>A</code> is a valid selection index,
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* one of two things happens depending on the seleciton status of
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* <code>A</code>:</p>
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*
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* <ul>
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*
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* <li><code>isSelectedIndex(A) == true</code>: set <code>[A,OL]</code>
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* to <em>deselected</em>, then set <code>[A,NL]</code> to
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* <em>selected</em>.</li>
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*
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* <li><code>isSelectedIndex(A) == false</code>: set <code>[A,OL]</code>
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* to <em>selected</em>, then set <code>[A,NL]</code> to
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* <em>deselected</em>.</li>
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*
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* </ul>
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*
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* <p>This method generates at most a single {@link ListSelectionEvent}
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* despite changing multiple ranges. The range of values provided to the
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* {@link ListSelectionEvent} includes only the minimum range of values
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* which changed selection status between the beginning and end of the
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* method.</p>
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*
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* @param leadIndex The new property value
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*
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* @see #getAnchorSelectionIndex
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*/
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public void setLeadSelectionIndex(int leadIndex)
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{
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// Only set the lead selection index to < 0 if anchorSelectionIndex < 0.
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if (leadIndex < 0)
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{
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if (anchorSelectionIndex < 0)
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leadSelectionIndex = -1;
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else
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return;
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}
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// Only touch the lead selection index if the anchor is >= 0.
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if (anchorSelectionIndex < 0)
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return;
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if (selectionMode == SINGLE_SELECTION)
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setSelectionInterval (leadIndex, leadIndex);
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int oldLeadIndex = leadSelectionIndex;
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if (oldLeadIndex == -1)
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oldLeadIndex = leadIndex;
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if (setLeadCalledFromAdd == false)
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oldSel = sel.clone();
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leadSelectionIndex = leadIndex;
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if (anchorSelectionIndex == -1)
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return;
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int R1 = Math.min(anchorSelectionIndex, oldLeadIndex);
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int R2 = Math.max(anchorSelectionIndex, oldLeadIndex);
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int S1 = Math.min(anchorSelectionIndex, leadIndex);
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int S2 = Math.max(anchorSelectionIndex, leadIndex);
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int lo = Math.min(R1, S1);
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int hi = Math.max(R2, S2);
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if (isSelectedIndex(anchorSelectionIndex))
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{
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sel.clear(R1, R2+1);
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sel.set(S1, S2+1);
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}
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else
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{
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sel.set(R1, R2+1);
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sel.clear(S1, S2+1);
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}
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int beg = sel.nextSetBit(0), end = -1;
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for(int i=beg; i >= 0; i=sel.nextSetBit(i+1))
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end = i;
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BitSet old = (BitSet) oldSel;
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// The new and previous lead location requires repainting.
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old.set(oldLeadIndex, !sel.get(oldLeadIndex));
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old.set(leadSelectionIndex, !sel.get(leadSelectionIndex));
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fireDifference(sel, old);
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}
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/**
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* Moves the lead selection index to <code>leadIndex</code> without
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* changing the selection values.
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*
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* If leadAnchorNotificationEnabled is true, send a notification covering the
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* old and new lead cells.
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*
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* @param leadIndex the new lead selection index
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* @since 1.5
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*/
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public void moveLeadSelectionIndex (int leadIndex)
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{
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if (leadSelectionIndex == leadIndex)
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return;
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leadSelectionIndex = leadIndex;
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if (isLeadAnchorNotificationEnabled())
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fireValueChanged(Math.min(leadSelectionIndex, leadIndex),
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Math.max(leadSelectionIndex, leadIndex));
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}
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/**
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* Gets the value of the {@link #leadAnchorNotificationEnabled} property.
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*
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* @return The current property value
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*
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* @see #setLeadAnchorNotificationEnabled
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*/
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public boolean isLeadAnchorNotificationEnabled()
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{
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return leadAnchorNotificationEnabled;
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}
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/**
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* Sets the value of the {@link #leadAnchorNotificationEnabled} property.
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*
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* @param l The new property value
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*
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* @see #isLeadAnchorNotificationEnabled
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*/
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public void setLeadAnchorNotificationEnabled(boolean l)
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{
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leadAnchorNotificationEnabled = l;
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}
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/**
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* Gets the value of the {@link #valueIsAdjusting} property.
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*
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* @return The current property value
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*
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* @see #setValueIsAdjusting
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*/
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public boolean getValueIsAdjusting()
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{
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return valueIsAdjusting;
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}
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/**
|
371 |
|
|
* Sets the value of the {@link #valueIsAdjusting} property.
|
372 |
|
|
*
|
373 |
|
|
* @param v The new property value
|
374 |
|
|
*
|
375 |
|
|
* @see #getValueIsAdjusting
|
376 |
|
|
*/
|
377 |
|
|
public void setValueIsAdjusting(boolean v)
|
378 |
|
|
{
|
379 |
|
|
valueIsAdjusting = v;
|
380 |
|
|
}
|
381 |
|
|
|
382 |
|
|
/**
|
383 |
|
|
* Determines whether the selection is empty.
|
384 |
|
|
*
|
385 |
|
|
* @return <code>true</code> if the selection is empty, otherwise
|
386 |
|
|
* <code>false</code>
|
387 |
|
|
*/
|
388 |
|
|
public boolean isSelectionEmpty()
|
389 |
|
|
{
|
390 |
|
|
return sel.isEmpty();
|
391 |
|
|
}
|
392 |
|
|
|
393 |
|
|
/**
|
394 |
|
|
* Gets the smallest index which is currently a member of a selection
|
395 |
|
|
* interval.
|
396 |
|
|
*
|
397 |
|
|
* @return The least integer <code>i</code> such that <code>i >=
|
398 |
|
|
* 0</code> and <code>i</code> is a member of a selected interval, or
|
399 |
|
|
* <code>-1</code> if there are no selected intervals
|
400 |
|
|
*
|
401 |
|
|
* @see #getMaxSelectionIndex
|
402 |
|
|
*/
|
403 |
|
|
public int getMinSelectionIndex()
|
404 |
|
|
{
|
405 |
|
|
if (isSelectionEmpty())
|
406 |
|
|
return -1;
|
407 |
|
|
|
408 |
|
|
return sel.nextSetBit(0);
|
409 |
|
|
}
|
410 |
|
|
|
411 |
|
|
/**
|
412 |
|
|
* Gets the largest index which is currently a member of a selection
|
413 |
|
|
* interval.
|
414 |
|
|
*
|
415 |
|
|
* @return The greatest integer <code>i</code> such that <code>i >=
|
416 |
|
|
* 0</code> and <code>i</code> is a member of a selected interval, or
|
417 |
|
|
* <code>-1</code> if there are no selected intervals
|
418 |
|
|
*
|
419 |
|
|
* @see #getMinSelectionIndex
|
420 |
|
|
*/
|
421 |
|
|
public int getMaxSelectionIndex()
|
422 |
|
|
{
|
423 |
|
|
if (isSelectionEmpty())
|
424 |
|
|
return -1;
|
425 |
|
|
|
426 |
|
|
int mx = -1;
|
427 |
|
|
for(int i=sel.nextSetBit(0); i >= 0; i=sel.nextSetBit(i+1))
|
428 |
|
|
{
|
429 |
|
|
mx = i;
|
430 |
|
|
}
|
431 |
|
|
return mx;
|
432 |
|
|
}
|
433 |
|
|
|
434 |
|
|
/**
|
435 |
|
|
* Determines whether a particular index is a member of a selection
|
436 |
|
|
* interval.
|
437 |
|
|
*
|
438 |
|
|
* @param a The index to search for
|
439 |
|
|
*
|
440 |
|
|
* @return <code>true</code> if the index is a member of a selection interval,
|
441 |
|
|
* otherwise <code>false</code>
|
442 |
|
|
*/
|
443 |
|
|
public boolean isSelectedIndex(int a)
|
444 |
|
|
{
|
445 |
|
|
// TODO: Probably throw an exception here?
|
446 |
|
|
if (a >= sel.length() || a < 0)
|
447 |
|
|
return false;
|
448 |
|
|
return sel.get(a);
|
449 |
|
|
}
|
450 |
|
|
|
451 |
|
|
/**
|
452 |
|
|
* If the {@link #selectionMode} property is equal to
|
453 |
|
|
* <code>SINGLE_SELECTION</code> equivalent to calling
|
454 |
|
|
* <code>setSelectionInterval(index1, index2)</code>;
|
455 |
|
|
* If the {@link #selectionMode} property is equal to
|
456 |
|
|
* <code>SINGLE_INTERVAL_SELECTION</code> and the interval being
|
457 |
|
|
* added is not adjacent to an already selected interval,
|
458 |
|
|
* equivalent to <code>setSelectionInterval(index1, index2)</code>.
|
459 |
|
|
* Otherwise adds the range <code>[index0, index1]</code>
|
460 |
|
|
* to the selection interval set.
|
461 |
|
|
*
|
462 |
|
|
* @param index0 The beginning of the range of indices to select
|
463 |
|
|
* @param index1 The end of the range of indices to select
|
464 |
|
|
*
|
465 |
|
|
* @see #setSelectionInterval
|
466 |
|
|
* @see #removeSelectionInterval
|
467 |
|
|
*/
|
468 |
|
|
public void addSelectionInterval(int index0, int index1)
|
469 |
|
|
{
|
470 |
|
|
if (index0 == -1 || index1 == -1)
|
471 |
|
|
return;
|
472 |
|
|
|
473 |
|
|
if (selectionMode == SINGLE_SELECTION)
|
474 |
|
|
setSelectionInterval(index0, index1);
|
475 |
|
|
else
|
476 |
|
|
{
|
477 |
|
|
int lo = Math.min(index0, index1);
|
478 |
|
|
int hi = Math.max(index0, index1);
|
479 |
|
|
oldSel = sel.clone();
|
480 |
|
|
|
481 |
|
|
|
482 |
|
|
// COMPAT: Like Sun (but not like IBM), we allow calls to
|
483 |
|
|
// addSelectionInterval when selectionMode is
|
484 |
|
|
// SINGLE_SELECTION_INTERVAL iff the interval being added
|
485 |
|
|
// is adjacent to an already selected interval
|
486 |
|
|
if (selectionMode == SINGLE_INTERVAL_SELECTION)
|
487 |
|
|
if (!(isSelectedIndex(index0) ||
|
488 |
|
|
isSelectedIndex(index1) ||
|
489 |
|
|
isSelectedIndex(Math.max(lo-1,0)) ||
|
490 |
|
|
isSelectedIndex(Math.min(hi+1,sel.size()))))
|
491 |
|
|
sel.clear();
|
492 |
|
|
|
493 |
|
|
// We have to update the anchorSelectionIndex and leadSelectionIndex
|
494 |
|
|
// variables
|
495 |
|
|
|
496 |
|
|
// The next if statements breaks down to "if this selection is adjacent
|
497 |
|
|
// to the previous selection and going in the same direction"
|
498 |
|
|
if ((isSelectedIndex(leadSelectionIndex))
|
499 |
|
|
&& ((index0 - 1 == leadSelectionIndex
|
500 |
|
|
&& (index1 >= index0)
|
501 |
|
|
&& (leadSelectionIndex >= anchorSelectionIndex))
|
502 |
|
|
|| (index0 + 1 == leadSelectionIndex && (index1 <= index0)
|
503 |
|
|
&& (leadSelectionIndex <= anchorSelectionIndex)))
|
504 |
|
|
&& (anchorSelectionIndex != -1 || leadSelectionIndex != -1))
|
505 |
|
|
{
|
506 |
|
|
// setting setLeadCalledFromAdd to true tells setLeadSelectionIndex
|
507 |
|
|
// not to update oldSel
|
508 |
|
|
setLeadCalledFromAdd = true;
|
509 |
|
|
setLeadSelectionIndex(index1);
|
510 |
|
|
setLeadCalledFromAdd = false;
|
511 |
|
|
}
|
512 |
|
|
else
|
513 |
|
|
{
|
514 |
|
|
leadSelectionIndex = index1;
|
515 |
|
|
anchorSelectionIndex = index0;
|
516 |
|
|
sel.set(lo, hi+1);
|
517 |
|
|
fireDifference(sel, (BitSet) oldSel);
|
518 |
|
|
}
|
519 |
|
|
}
|
520 |
|
|
}
|
521 |
|
|
|
522 |
|
|
|
523 |
|
|
/**
|
524 |
|
|
* Deselects all indices in the inclusive range
|
525 |
|
|
* <code>[index0,index1]</code>.
|
526 |
|
|
*
|
527 |
|
|
* @param index0 The beginning of the range of indices to deselect
|
528 |
|
|
* @param index1 The end of the range of indices to deselect
|
529 |
|
|
*
|
530 |
|
|
* @see #addSelectionInterval
|
531 |
|
|
* @see #setSelectionInterval
|
532 |
|
|
*/
|
533 |
|
|
public void removeSelectionInterval(int index0,
|
534 |
|
|
int index1)
|
535 |
|
|
{
|
536 |
|
|
if (index0 == -1 || index1 == -1)
|
537 |
|
|
return;
|
538 |
|
|
|
539 |
|
|
oldSel = sel.clone();
|
540 |
|
|
int lo = Math.min(index0, index1);
|
541 |
|
|
int hi = Math.max(index0, index1);
|
542 |
|
|
|
543 |
|
|
// if selectionMode is SINGLE_INTERVAL_SELECTION and removing the interval
|
544 |
|
|
// (index0,index1) would leave two disjoint selection intervals, remove all
|
545 |
|
|
// selected indices from lo to the last selected index
|
546 |
|
|
if (getMinSelectionIndex() > 0 && getMinSelectionIndex() < lo &&
|
547 |
|
|
selectionMode == SINGLE_INTERVAL_SELECTION)
|
548 |
|
|
hi = sel.size() - 1;
|
549 |
|
|
|
550 |
|
|
sel.clear(lo, hi+1);
|
551 |
|
|
//update anchorSelectionIndex and leadSelectionIndex variables
|
552 |
|
|
//TODO: will probably need MouseDragged to test properly and know if this works
|
553 |
|
|
setAnchorSelectionIndex(index0);
|
554 |
|
|
leadSelectionIndex = index1;
|
555 |
|
|
|
556 |
|
|
fireDifference(sel, (BitSet) oldSel);
|
557 |
|
|
}
|
558 |
|
|
|
559 |
|
|
/**
|
560 |
|
|
* Removes all intervals in the selection set.
|
561 |
|
|
*/
|
562 |
|
|
public void clearSelection()
|
563 |
|
|
{
|
564 |
|
|
// Find the selected interval.
|
565 |
|
|
int from = sel.nextSetBit(0);
|
566 |
|
|
if (from < 0)
|
567 |
|
|
return; // Empty selection - nothing to do.
|
568 |
|
|
int to = from;
|
569 |
|
|
|
570 |
|
|
int i;
|
571 |
|
|
|
572 |
|
|
for (i = from; i>=0; i=sel.nextSetBit(i+1))
|
573 |
|
|
to = i;
|
574 |
|
|
|
575 |
|
|
sel.clear();
|
576 |
|
|
fireValueChanged(from, to, valueIsAdjusting);
|
577 |
|
|
}
|
578 |
|
|
|
579 |
|
|
/**
|
580 |
|
|
* Fire the change event, covering the difference between the two sets.
|
581 |
|
|
*
|
582 |
|
|
* @param current the current set
|
583 |
|
|
* @param x the previous set, the object will be reused.
|
584 |
|
|
*/
|
585 |
|
|
private void fireDifference(BitSet current, BitSet x)
|
586 |
|
|
{
|
587 |
|
|
x.xor(current);
|
588 |
|
|
int from = x.nextSetBit(0);
|
589 |
|
|
if (from < 0)
|
590 |
|
|
return; // No difference.
|
591 |
|
|
int to = from;
|
592 |
|
|
int i;
|
593 |
|
|
|
594 |
|
|
for (i = from; i >= 0; i = x.nextSetBit(i+1))
|
595 |
|
|
to = i;
|
596 |
|
|
|
597 |
|
|
fireValueChanged(from, to, valueIsAdjusting);
|
598 |
|
|
}
|
599 |
|
|
|
600 |
|
|
/**
|
601 |
|
|
* Clears the current selection and marks a given interval as "selected". If
|
602 |
|
|
* the current selection mode is <code>SINGLE_SELECTION</code> only the
|
603 |
|
|
* index <code>index2</code> is selected.
|
604 |
|
|
*
|
605 |
|
|
* @param anchor the anchor selection index.
|
606 |
|
|
* @param lead the lead selection index.
|
607 |
|
|
*/
|
608 |
|
|
public void setSelectionInterval(int anchor, int lead)
|
609 |
|
|
{
|
610 |
|
|
if (anchor == -1 || lead == -1)
|
611 |
|
|
return;
|
612 |
|
|
if (selectionMode == SINGLE_SELECTION)
|
613 |
|
|
{
|
614 |
|
|
int lo = lead;
|
615 |
|
|
int hi = lead;
|
616 |
|
|
int selected = sel.nextSetBit(0);
|
617 |
|
|
if (selected == lead)
|
618 |
|
|
return; // the selection is not changing
|
619 |
|
|
if (selected >= 0)
|
620 |
|
|
{
|
621 |
|
|
lo = Math.min(lo, selected);
|
622 |
|
|
hi = Math.max(hi, selected);
|
623 |
|
|
}
|
624 |
|
|
if (anchorSelectionIndex >= 0)
|
625 |
|
|
{
|
626 |
|
|
lo = Math.min(lo, anchorSelectionIndex);
|
627 |
|
|
hi = Math.max(hi, anchorSelectionIndex);
|
628 |
|
|
}
|
629 |
|
|
sel.clear();
|
630 |
|
|
sel.set(lead);
|
631 |
|
|
leadSelectionIndex = lead;
|
632 |
|
|
anchorSelectionIndex = lead;
|
633 |
|
|
fireValueChanged(lo, hi);
|
634 |
|
|
}
|
635 |
|
|
else if (selectionMode == SINGLE_INTERVAL_SELECTION)
|
636 |
|
|
{
|
637 |
|
|
// determine the current interval
|
638 |
|
|
int first = sel.nextSetBit(0);
|
639 |
|
|
int last = first;
|
640 |
|
|
if (first >= 0)
|
641 |
|
|
last += (sel.cardinality() - 1);
|
642 |
|
|
|
643 |
|
|
// update the selection
|
644 |
|
|
int lo = Math.min(anchor, lead);
|
645 |
|
|
int hi = Math.max(anchor, lead);
|
646 |
|
|
if (lo == first && hi == last)
|
647 |
|
|
return; // selected interval is not being changed
|
648 |
|
|
sel.clear();
|
649 |
|
|
sel.set(lo, hi + 1);
|
650 |
|
|
|
651 |
|
|
// include the old selection in the event range
|
652 |
|
|
if (first >= 0)
|
653 |
|
|
lo = Math.min(lo, first);
|
654 |
|
|
if (last >= 0)
|
655 |
|
|
hi = Math.max(hi, last);
|
656 |
|
|
if (anchorSelectionIndex >= 0)
|
657 |
|
|
{
|
658 |
|
|
lo = Math.min(lo, anchorSelectionIndex);
|
659 |
|
|
hi = Math.max(hi, anchorSelectionIndex);
|
660 |
|
|
}
|
661 |
|
|
anchorSelectionIndex = anchor;
|
662 |
|
|
leadSelectionIndex = lead;
|
663 |
|
|
fireValueChanged(lo, hi);
|
664 |
|
|
}
|
665 |
|
|
else
|
666 |
|
|
{
|
667 |
|
|
BitSet oldSel = (BitSet) sel.clone();
|
668 |
|
|
sel.clear();
|
669 |
|
|
if (selectionMode == SINGLE_SELECTION)
|
670 |
|
|
anchor = lead;
|
671 |
|
|
|
672 |
|
|
int lo = Math.min(anchor, lead);
|
673 |
|
|
int hi = Math.max(anchor, lead);
|
674 |
|
|
sel.set(lo, hi+1);
|
675 |
|
|
// update the anchorSelectionIndex and leadSelectionIndex variables
|
676 |
|
|
setAnchorSelectionIndex(anchor);
|
677 |
|
|
leadSelectionIndex = lead;
|
678 |
|
|
|
679 |
|
|
fireDifference(sel, oldSel);
|
680 |
|
|
}
|
681 |
|
|
}
|
682 |
|
|
|
683 |
|
|
/**
|
684 |
|
|
* Inserts a number of indices either before or after a particular
|
685 |
|
|
* position in the set of indices. Renumbers all indices after the
|
686 |
|
|
* inserted range. The new indices in the inserted range are not
|
687 |
|
|
* selected. This method is typically called to synchronize the selection
|
688 |
|
|
* model with an inserted range of elements in a {@link ListModel}.
|
689 |
|
|
*
|
690 |
|
|
* @param index The position to insert indices at
|
691 |
|
|
* @param length The number of indices to insert
|
692 |
|
|
* @param before Indicates whether to insert the indices before the index
|
693 |
|
|
* or after it
|
694 |
|
|
*/
|
695 |
|
|
public void insertIndexInterval(int index,
|
696 |
|
|
int length,
|
697 |
|
|
boolean before)
|
698 |
|
|
{
|
699 |
|
|
if (!before)
|
700 |
|
|
{
|
701 |
|
|
index++;
|
702 |
|
|
length--;
|
703 |
|
|
}
|
704 |
|
|
BitSet tmp = sel.get(index, sel.size());
|
705 |
|
|
sel.clear(index, sel.size());
|
706 |
|
|
int n = tmp.size();
|
707 |
|
|
for (int i = 0; i < n; ++i)
|
708 |
|
|
sel.set(index + length + i, tmp.get(i));
|
709 |
|
|
}
|
710 |
|
|
|
711 |
|
|
/**
|
712 |
|
|
* Removes a range from the set of indices. Renumbers all indices after
|
713 |
|
|
* the removed range. This method is typically called to synchronize the
|
714 |
|
|
* selection model with a deleted range of elements in a {@link
|
715 |
|
|
* ListModel}.
|
716 |
|
|
*
|
717 |
|
|
* @param index0 The first index to remove (inclusive)
|
718 |
|
|
* @param index1 The last index to remove (inclusive)
|
719 |
|
|
*/
|
720 |
|
|
public void removeIndexInterval(int index0,
|
721 |
|
|
int index1)
|
722 |
|
|
{
|
723 |
|
|
int lo = Math.min(index0, index1);
|
724 |
|
|
int hi = Math.max(index0, index1);
|
725 |
|
|
|
726 |
|
|
BitSet tmp = sel.get(hi, sel.size());
|
727 |
|
|
sel.clear(lo, sel.size());
|
728 |
|
|
int n = tmp.size();
|
729 |
|
|
for (int i = 0; i < n; ++i)
|
730 |
|
|
sel.set(lo + i, tmp.get(i));
|
731 |
|
|
}
|
732 |
|
|
|
733 |
|
|
/**
|
734 |
|
|
* Fires a {@link ListSelectionEvent} to all the listeners of type {@link
|
735 |
|
|
* ListSelectionListener} registered with this selection model to
|
736 |
|
|
* indicate that a series of adjustment has just ended.
|
737 |
|
|
*
|
738 |
|
|
* The values of {@link #getMinSelectionIndex} and
|
739 |
|
|
* {@link #getMaxSelectionIndex} are used in the {@link ListSelectionEvent}
|
740 |
|
|
* that gets fired.
|
741 |
|
|
*
|
742 |
|
|
* @param isAdjusting <code>true</code> if this is the final change
|
743 |
|
|
* in a series of adjustments, <code>false/code> otherwise
|
744 |
|
|
*/
|
745 |
|
|
protected void fireValueChanged(boolean isAdjusting)
|
746 |
|
|
{
|
747 |
|
|
fireValueChanged(getMinSelectionIndex(), getMaxSelectionIndex(),
|
748 |
|
|
isAdjusting);
|
749 |
|
|
}
|
750 |
|
|
|
751 |
|
|
/**
|
752 |
|
|
* Fires a {@link ListSelectionEvent} to all the listeners of type {@link
|
753 |
|
|
* ListSelectionListener} registered with this selection model.
|
754 |
|
|
*
|
755 |
|
|
* @param firstIndex The low index of the changed range
|
756 |
|
|
* @param lastIndex The high index of the changed range
|
757 |
|
|
*/
|
758 |
|
|
protected void fireValueChanged(int firstIndex, int lastIndex)
|
759 |
|
|
{
|
760 |
|
|
fireValueChanged(firstIndex, lastIndex, getValueIsAdjusting());
|
761 |
|
|
}
|
762 |
|
|
|
763 |
|
|
/**
|
764 |
|
|
* Fires a {@link ListSelectionEvent} to all the listeners of type {@link
|
765 |
|
|
* ListSelectionListener} registered with this selection model.
|
766 |
|
|
*
|
767 |
|
|
* @param firstIndex The low index of the changed range
|
768 |
|
|
* @param lastIndex The high index of the changed range
|
769 |
|
|
* @param isAdjusting Whether this change is part of a seqence of adjustments
|
770 |
|
|
* made to the selection, such as during interactive scrolling
|
771 |
|
|
*/
|
772 |
|
|
protected void fireValueChanged(int firstIndex, int lastIndex,
|
773 |
|
|
boolean isAdjusting)
|
774 |
|
|
{
|
775 |
|
|
ListSelectionEvent evt = new ListSelectionEvent(this, firstIndex,
|
776 |
|
|
lastIndex, isAdjusting);
|
777 |
|
|
ListSelectionListener[] listeners = getListSelectionListeners();
|
778 |
|
|
for (int i = 0; i < listeners.length; ++i)
|
779 |
|
|
listeners[i].valueChanged(evt);
|
780 |
|
|
}
|
781 |
|
|
|
782 |
|
|
/**
|
783 |
|
|
* Adds a listener.
|
784 |
|
|
*
|
785 |
|
|
* @param listener The listener to add
|
786 |
|
|
*
|
787 |
|
|
* @see #removeListSelectionListener
|
788 |
|
|
* @see #getListSelectionListeners
|
789 |
|
|
*/
|
790 |
|
|
public void addListSelectionListener(ListSelectionListener listener)
|
791 |
|
|
{
|
792 |
|
|
listenerList.add(ListSelectionListener.class, listener);
|
793 |
|
|
}
|
794 |
|
|
|
795 |
|
|
/**
|
796 |
|
|
* Removes a registered listener.
|
797 |
|
|
*
|
798 |
|
|
* @param listener The listener to remove
|
799 |
|
|
*
|
800 |
|
|
* @see #addListSelectionListener
|
801 |
|
|
* @see #getListSelectionListeners
|
802 |
|
|
*/
|
803 |
|
|
public void removeListSelectionListener(ListSelectionListener listener)
|
804 |
|
|
{
|
805 |
|
|
listenerList.remove(ListSelectionListener.class, listener);
|
806 |
|
|
}
|
807 |
|
|
|
808 |
|
|
/**
|
809 |
|
|
* Returns an array of all registerers listeners.
|
810 |
|
|
*
|
811 |
|
|
* @param listenerType The type of listener to retrieve
|
812 |
|
|
*
|
813 |
|
|
* @return The array
|
814 |
|
|
*
|
815 |
|
|
* @see #getListSelectionListeners
|
816 |
|
|
* @since 1.3
|
817 |
|
|
*/
|
818 |
|
|
public <T extends EventListener> T[] getListeners(Class<T> listenerType)
|
819 |
|
|
{
|
820 |
|
|
return listenerList.getListeners(listenerType);
|
821 |
|
|
}
|
822 |
|
|
|
823 |
|
|
/**
|
824 |
|
|
* Returns an array of all registerd list selection listeners.
|
825 |
|
|
*
|
826 |
|
|
* @return the array
|
827 |
|
|
*
|
828 |
|
|
* @see #addListSelectionListener
|
829 |
|
|
* @see #removeListSelectionListener
|
830 |
|
|
* @see #getListeners
|
831 |
|
|
* @since 1.4
|
832 |
|
|
*/
|
833 |
|
|
public ListSelectionListener[] getListSelectionListeners()
|
834 |
|
|
{
|
835 |
|
|
return (ListSelectionListener[]) getListeners(ListSelectionListener.class);
|
836 |
|
|
}
|
837 |
|
|
|
838 |
|
|
/**
|
839 |
|
|
* Returns a clone of this object.
|
840 |
|
|
* <code>listenerList</code> don't gets duplicated.
|
841 |
|
|
*
|
842 |
|
|
* @return the cloned object
|
843 |
|
|
*
|
844 |
|
|
* @throws CloneNotSupportedException if an error occurs
|
845 |
|
|
*/
|
846 |
|
|
public Object clone()
|
847 |
|
|
throws CloneNotSupportedException
|
848 |
|
|
{
|
849 |
|
|
DefaultListSelectionModel model =
|
850 |
|
|
(DefaultListSelectionModel) super.clone();
|
851 |
|
|
model.sel = (BitSet) sel.clone();
|
852 |
|
|
model.listenerList = new EventListenerList();
|
853 |
|
|
return model;
|
854 |
|
|
}
|
855 |
|
|
}
|