mirror of git://gcc.gnu.org/git/gcc.git
856 lines
26 KiB
Java
856 lines
26 KiB
Java
/* DefaultListSelectionModel.java --
|
|
Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
|
|
package javax.swing;
|
|
|
|
import java.io.Serializable;
|
|
import java.util.BitSet;
|
|
import java.util.EventListener;
|
|
|
|
import javax.swing.event.EventListenerList;
|
|
import javax.swing.event.ListSelectionEvent;
|
|
import javax.swing.event.ListSelectionListener;
|
|
|
|
/**
|
|
* The default implementation of {@link ListSelectionModel},
|
|
* which is used by {@link javax.swing.JList} and
|
|
* similar classes to manage the selection status of a number of data
|
|
* elements.
|
|
*
|
|
* <p>The class is organized <em>abstractly</em> as a set of intervals of
|
|
* integers. Each interval indicates an inclusive range of indices in a
|
|
* list -- held by some other object and unknown to this class -- which is
|
|
* considered "selected". There are various accessors for querying and
|
|
* modifying the set of intervals, with simplified forms accepting a single
|
|
* index, representing an interval with only one element. </p>
|
|
*/
|
|
public class DefaultListSelectionModel implements Cloneable,
|
|
ListSelectionModel,
|
|
Serializable
|
|
{
|
|
private static final long serialVersionUID = -5718799865110415860L;
|
|
|
|
/** The list of ListSelectionListeners subscribed to this selection model. */
|
|
protected EventListenerList listenerList = new EventListenerList();
|
|
|
|
|
|
/**
|
|
* The current list selection mode. Must be one of the numeric constants
|
|
* <code>SINGLE_SELECTION</code>, <code>SINGLE_INTERVAL_SELECTION</code>
|
|
* or <code>MULTIPLE_INTERVAL_SELECTION</code> from {@link
|
|
* ListSelectionModel}. The default value is
|
|
* <code>MULTIPLE_INTERVAL_SELECTION</code>.
|
|
*/
|
|
int selectionMode = MULTIPLE_INTERVAL_SELECTION;
|
|
|
|
/**
|
|
* The index of the "lead" of the most recent selection. The lead is the
|
|
* second argument in any call to {@link #setSelectionInterval}, {@link
|
|
* #addSelectionInterval} or {@link #removeSelectionInterval}. Generally
|
|
* the lead refers to the most recent position a user dragged their mouse
|
|
* over.
|
|
*/
|
|
int leadSelectionIndex = -1;
|
|
|
|
/**
|
|
* The index of the "anchor" of the most recent selection. The anchor is
|
|
* the first argument in any call to {@link #setSelectionInterval},
|
|
* {@link #addSelectionInterval} or {@link
|
|
* #removeSelectionInterval}. Generally the anchor refers to the first
|
|
* recent position a user clicks when they begin to drag their mouse over
|
|
* a list.
|
|
*
|
|
* @see #getAnchorSelectionIndex
|
|
* @see #setAnchorSelectionIndex
|
|
*/
|
|
int anchorSelectionIndex = -1;
|
|
|
|
/**
|
|
* controls the range of indices provided in any {@link
|
|
* ListSelectionEvent} fired by the selectionModel. Let
|
|
* <code>[A,L]</code> be the range of indices between {@link
|
|
* #anchorSelectionIndex} and {@link #leadSelectionIndex} inclusive, and
|
|
* let <code>[i0,i1]</code> be the range of indices changed in a given
|
|
* call which generates a {@link ListSelectionEvent}. Then when this
|
|
* property is <code>true</code>, the {@link ListSelectionEvent} contains
|
|
* the range <code>[A,L] union [i0,i1]</code>; when <code>false</code> it
|
|
* will contain only <code>[i0,i1]</code>. The default is
|
|
* <code>true</code>.
|
|
*
|
|
* @see #isLeadAnchorNotificationEnabled
|
|
* @see #setLeadAnchorNotificationEnabled
|
|
*/
|
|
protected boolean leadAnchorNotificationEnabled = true;
|
|
|
|
/**
|
|
* Whether the selection is currently "adjusting". Any {@link
|
|
* ListSelectionEvent} events constructed in response to changes in this
|
|
* list selection model will have their {@link
|
|
* ListSelectionEvent#isAdjusting} field set to this value.
|
|
*
|
|
* @see #getValueIsAdjusting
|
|
* @see #setValueIsAdjusting
|
|
*/
|
|
boolean valueIsAdjusting = false;
|
|
|
|
|
|
/**
|
|
* The current set of "intervals", represented simply by a {@link
|
|
* java.util.BitSet}. A set bit indicates a selected index, whereas a
|
|
* cleared bit indicates a non-selected index.
|
|
*/
|
|
BitSet sel = new BitSet();
|
|
|
|
/**
|
|
* A variable to store the previous value of sel.
|
|
* Used to make sure we only fireValueChanged when the BitSet
|
|
* actually does change.
|
|
*/
|
|
Object oldSel;
|
|
|
|
/**
|
|
* Whether this call of setLeadSelectionInterval was called locally
|
|
* from addSelectionInterval
|
|
*/
|
|
boolean setLeadCalledFromAdd = false;
|
|
|
|
/**
|
|
* Returns the selection mode, which is one of {@link #SINGLE_SELECTION},
|
|
* {@link #SINGLE_INTERVAL_SELECTION} and
|
|
* {@link #MULTIPLE_INTERVAL_SELECTION}. The default value is
|
|
* {@link #MULTIPLE_INTERVAL_SELECTION}.
|
|
*
|
|
* @return The selection mode.
|
|
*
|
|
* @see #setSelectionMode(int)
|
|
*/
|
|
public int getSelectionMode()
|
|
{
|
|
return selectionMode;
|
|
}
|
|
|
|
/**
|
|
* Sets the value of the {@link #selectionMode} property.
|
|
*
|
|
* @param mode The new value of the property
|
|
*/
|
|
public void setSelectionMode(int mode)
|
|
{
|
|
if (mode < ListSelectionModel.SINGLE_SELECTION
|
|
|| mode > ListSelectionModel.MULTIPLE_INTERVAL_SELECTION)
|
|
throw new IllegalArgumentException("Unrecognised mode: " + mode);
|
|
selectionMode = mode;
|
|
}
|
|
|
|
/**
|
|
* Gets the value of the {@link #anchorSelectionIndex} property.
|
|
*
|
|
* @return The current property value
|
|
*
|
|
* @see #setAnchorSelectionIndex
|
|
*/
|
|
public int getAnchorSelectionIndex()
|
|
{
|
|
return anchorSelectionIndex;
|
|
}
|
|
|
|
/**
|
|
* Sets the value of the {@link #anchorSelectionIndex} property.
|
|
*
|
|
* @param index The new property value
|
|
*
|
|
* @see #getAnchorSelectionIndex
|
|
*/
|
|
public void setAnchorSelectionIndex(int index)
|
|
{
|
|
if (anchorSelectionIndex != index)
|
|
{
|
|
int old = anchorSelectionIndex;
|
|
anchorSelectionIndex = index;
|
|
if (leadAnchorNotificationEnabled)
|
|
fireValueChanged(index, old);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Gets the value of the {@link #leadSelectionIndex} property.
|
|
*
|
|
* @return The current property value
|
|
*
|
|
* @see #setLeadSelectionIndex
|
|
*/
|
|
public int getLeadSelectionIndex()
|
|
{
|
|
return leadSelectionIndex;
|
|
}
|
|
|
|
/**
|
|
* <p>Sets the value of the {@link #anchorSelectionIndex} property. As a
|
|
* side effect, alters the selection status of two ranges of indices. Let
|
|
* <code>OL</code> be the old lead selection index, <code>NL</code> be
|
|
* the new lead selection index, and <code>A</code> be the anchor
|
|
* selection index. Then if <code>A</code> is a valid selection index,
|
|
* one of two things happens depending on the seleciton status of
|
|
* <code>A</code>:</p>
|
|
*
|
|
* <ul>
|
|
*
|
|
* <li><code>isSelectedIndex(A) == true</code>: set <code>[A,OL]</code>
|
|
* to <em>deselected</em>, then set <code>[A,NL]</code> to
|
|
* <em>selected</em>.</li>
|
|
*
|
|
* <li><code>isSelectedIndex(A) == false</code>: set <code>[A,OL]</code>
|
|
* to <em>selected</em>, then set <code>[A,NL]</code> to
|
|
* <em>deselected</em>.</li>
|
|
*
|
|
* </ul>
|
|
*
|
|
* <p>This method generates at most a single {@link ListSelectionEvent}
|
|
* despite changing multiple ranges. The range of values provided to the
|
|
* {@link ListSelectionEvent} includes only the minimum range of values
|
|
* which changed selection status between the beginning and end of the
|
|
* method.</p>
|
|
*
|
|
* @param leadIndex The new property value
|
|
*
|
|
* @see #getAnchorSelectionIndex
|
|
*/
|
|
public void setLeadSelectionIndex(int leadIndex)
|
|
{
|
|
// Only set the lead selection index to < 0 if anchorSelectionIndex < 0.
|
|
if (leadIndex < 0)
|
|
{
|
|
if (anchorSelectionIndex < 0)
|
|
leadSelectionIndex = -1;
|
|
else
|
|
return;
|
|
}
|
|
|
|
// Only touch the lead selection index if the anchor is >= 0.
|
|
if (anchorSelectionIndex < 0)
|
|
return;
|
|
|
|
if (selectionMode == SINGLE_SELECTION)
|
|
setSelectionInterval (leadIndex, leadIndex);
|
|
|
|
int oldLeadIndex = leadSelectionIndex;
|
|
if (oldLeadIndex == -1)
|
|
oldLeadIndex = leadIndex;
|
|
if (setLeadCalledFromAdd == false)
|
|
oldSel = sel.clone();
|
|
leadSelectionIndex = leadIndex;
|
|
|
|
if (anchorSelectionIndex == -1)
|
|
return;
|
|
|
|
int R1 = Math.min(anchorSelectionIndex, oldLeadIndex);
|
|
int R2 = Math.max(anchorSelectionIndex, oldLeadIndex);
|
|
int S1 = Math.min(anchorSelectionIndex, leadIndex);
|
|
int S2 = Math.max(anchorSelectionIndex, leadIndex);
|
|
|
|
int lo = Math.min(R1, S1);
|
|
int hi = Math.max(R2, S2);
|
|
|
|
if (isSelectedIndex(anchorSelectionIndex))
|
|
{
|
|
sel.clear(R1, R2+1);
|
|
sel.set(S1, S2+1);
|
|
}
|
|
else
|
|
{
|
|
sel.set(R1, R2+1);
|
|
sel.clear(S1, S2+1);
|
|
}
|
|
|
|
int beg = sel.nextSetBit(0), end = -1;
|
|
for(int i=beg; i >= 0; i=sel.nextSetBit(i+1))
|
|
end = i;
|
|
|
|
BitSet old = (BitSet) oldSel;
|
|
|
|
// The new and previous lead location requires repainting.
|
|
old.set(oldLeadIndex, !sel.get(oldLeadIndex));
|
|
old.set(leadSelectionIndex, !sel.get(leadSelectionIndex));
|
|
|
|
fireDifference(sel, old);
|
|
}
|
|
|
|
/**
|
|
* Moves the lead selection index to <code>leadIndex</code> without
|
|
* changing the selection values.
|
|
*
|
|
* If leadAnchorNotificationEnabled is true, send a notification covering the
|
|
* old and new lead cells.
|
|
*
|
|
* @param leadIndex the new lead selection index
|
|
* @since 1.5
|
|
*/
|
|
public void moveLeadSelectionIndex (int leadIndex)
|
|
{
|
|
if (leadSelectionIndex == leadIndex)
|
|
return;
|
|
|
|
leadSelectionIndex = leadIndex;
|
|
if (isLeadAnchorNotificationEnabled())
|
|
fireValueChanged(Math.min(leadSelectionIndex, leadIndex),
|
|
Math.max(leadSelectionIndex, leadIndex));
|
|
}
|
|
|
|
/**
|
|
* Gets the value of the {@link #leadAnchorNotificationEnabled} property.
|
|
*
|
|
* @return The current property value
|
|
*
|
|
* @see #setLeadAnchorNotificationEnabled
|
|
*/
|
|
public boolean isLeadAnchorNotificationEnabled()
|
|
{
|
|
return leadAnchorNotificationEnabled;
|
|
}
|
|
|
|
/**
|
|
* Sets the value of the {@link #leadAnchorNotificationEnabled} property.
|
|
*
|
|
* @param l The new property value
|
|
*
|
|
* @see #isLeadAnchorNotificationEnabled
|
|
*/
|
|
public void setLeadAnchorNotificationEnabled(boolean l)
|
|
{
|
|
leadAnchorNotificationEnabled = l;
|
|
}
|
|
|
|
/**
|
|
* Gets the value of the {@link #valueIsAdjusting} property.
|
|
*
|
|
* @return The current property value
|
|
*
|
|
* @see #setValueIsAdjusting
|
|
*/
|
|
public boolean getValueIsAdjusting()
|
|
{
|
|
return valueIsAdjusting;
|
|
}
|
|
|
|
/**
|
|
* Sets the value of the {@link #valueIsAdjusting} property.
|
|
*
|
|
* @param v The new property value
|
|
*
|
|
* @see #getValueIsAdjusting
|
|
*/
|
|
public void setValueIsAdjusting(boolean v)
|
|
{
|
|
valueIsAdjusting = v;
|
|
}
|
|
|
|
/**
|
|
* Determines whether the selection is empty.
|
|
*
|
|
* @return <code>true</code> if the selection is empty, otherwise
|
|
* <code>false</code>
|
|
*/
|
|
public boolean isSelectionEmpty()
|
|
{
|
|
return sel.isEmpty();
|
|
}
|
|
|
|
/**
|
|
* Gets the smallest index which is currently a member of a selection
|
|
* interval.
|
|
*
|
|
* @return The least integer <code>i</code> such that <code>i >=
|
|
* 0</code> and <code>i</code> is a member of a selected interval, or
|
|
* <code>-1</code> if there are no selected intervals
|
|
*
|
|
* @see #getMaxSelectionIndex
|
|
*/
|
|
public int getMinSelectionIndex()
|
|
{
|
|
if (isSelectionEmpty())
|
|
return -1;
|
|
|
|
return sel.nextSetBit(0);
|
|
}
|
|
|
|
/**
|
|
* Gets the largest index which is currently a member of a selection
|
|
* interval.
|
|
*
|
|
* @return The greatest integer <code>i</code> such that <code>i >=
|
|
* 0</code> and <code>i</code> is a member of a selected interval, or
|
|
* <code>-1</code> if there are no selected intervals
|
|
*
|
|
* @see #getMinSelectionIndex
|
|
*/
|
|
public int getMaxSelectionIndex()
|
|
{
|
|
if (isSelectionEmpty())
|
|
return -1;
|
|
|
|
int mx = -1;
|
|
for(int i=sel.nextSetBit(0); i >= 0; i=sel.nextSetBit(i+1))
|
|
{
|
|
mx = i;
|
|
}
|
|
return mx;
|
|
}
|
|
|
|
/**
|
|
* Determines whether a particular index is a member of a selection
|
|
* interval.
|
|
*
|
|
* @param a The index to search for
|
|
*
|
|
* @return <code>true</code> if the index is a member of a selection interval,
|
|
* otherwise <code>false</code>
|
|
*/
|
|
public boolean isSelectedIndex(int a)
|
|
{
|
|
// TODO: Probably throw an exception here?
|
|
if (a >= sel.length() || a < 0)
|
|
return false;
|
|
return sel.get(a);
|
|
}
|
|
|
|
/**
|
|
* If the {@link #selectionMode} property is equal to
|
|
* <code>SINGLE_SELECTION</code> equivalent to calling
|
|
* <code>setSelectionInterval(index1, index2)</code>;
|
|
* If the {@link #selectionMode} property is equal to
|
|
* <code>SINGLE_INTERVAL_SELECTION</code> and the interval being
|
|
* added is not adjacent to an already selected interval,
|
|
* equivalent to <code>setSelectionInterval(index1, index2)</code>.
|
|
* Otherwise adds the range <code>[index0, index1]</code>
|
|
* to the selection interval set.
|
|
*
|
|
* @param index0 The beginning of the range of indices to select
|
|
* @param index1 The end of the range of indices to select
|
|
*
|
|
* @see #setSelectionInterval
|
|
* @see #removeSelectionInterval
|
|
*/
|
|
public void addSelectionInterval(int index0, int index1)
|
|
{
|
|
if (index0 == -1 || index1 == -1)
|
|
return;
|
|
|
|
if (selectionMode == SINGLE_SELECTION)
|
|
setSelectionInterval(index0, index1);
|
|
else
|
|
{
|
|
int lo = Math.min(index0, index1);
|
|
int hi = Math.max(index0, index1);
|
|
oldSel = sel.clone();
|
|
|
|
|
|
// COMPAT: Like Sun (but not like IBM), we allow calls to
|
|
// addSelectionInterval when selectionMode is
|
|
// SINGLE_SELECTION_INTERVAL iff the interval being added
|
|
// is adjacent to an already selected interval
|
|
if (selectionMode == SINGLE_INTERVAL_SELECTION)
|
|
if (!(isSelectedIndex(index0) ||
|
|
isSelectedIndex(index1) ||
|
|
isSelectedIndex(Math.max(lo-1,0)) ||
|
|
isSelectedIndex(Math.min(hi+1,sel.size()))))
|
|
sel.clear();
|
|
|
|
// We have to update the anchorSelectionIndex and leadSelectionIndex
|
|
// variables
|
|
|
|
// The next if statements breaks down to "if this selection is adjacent
|
|
// to the previous selection and going in the same direction"
|
|
if ((isSelectedIndex(leadSelectionIndex))
|
|
&& ((index0 - 1 == leadSelectionIndex
|
|
&& (index1 >= index0)
|
|
&& (leadSelectionIndex >= anchorSelectionIndex))
|
|
|| (index0 + 1 == leadSelectionIndex && (index1 <= index0)
|
|
&& (leadSelectionIndex <= anchorSelectionIndex)))
|
|
&& (anchorSelectionIndex != -1 || leadSelectionIndex != -1))
|
|
{
|
|
// setting setLeadCalledFromAdd to true tells setLeadSelectionIndex
|
|
// not to update oldSel
|
|
setLeadCalledFromAdd = true;
|
|
setLeadSelectionIndex(index1);
|
|
setLeadCalledFromAdd = false;
|
|
}
|
|
else
|
|
{
|
|
leadSelectionIndex = index1;
|
|
anchorSelectionIndex = index0;
|
|
sel.set(lo, hi+1);
|
|
fireDifference(sel, (BitSet) oldSel);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Deselects all indices in the inclusive range
|
|
* <code>[index0,index1]</code>.
|
|
*
|
|
* @param index0 The beginning of the range of indices to deselect
|
|
* @param index1 The end of the range of indices to deselect
|
|
*
|
|
* @see #addSelectionInterval
|
|
* @see #setSelectionInterval
|
|
*/
|
|
public void removeSelectionInterval(int index0,
|
|
int index1)
|
|
{
|
|
if (index0 == -1 || index1 == -1)
|
|
return;
|
|
|
|
oldSel = sel.clone();
|
|
int lo = Math.min(index0, index1);
|
|
int hi = Math.max(index0, index1);
|
|
|
|
// if selectionMode is SINGLE_INTERVAL_SELECTION and removing the interval
|
|
// (index0,index1) would leave two disjoint selection intervals, remove all
|
|
// selected indices from lo to the last selected index
|
|
if (getMinSelectionIndex() > 0 && getMinSelectionIndex() < lo &&
|
|
selectionMode == SINGLE_INTERVAL_SELECTION)
|
|
hi = sel.size() - 1;
|
|
|
|
sel.clear(lo, hi+1);
|
|
//update anchorSelectionIndex and leadSelectionIndex variables
|
|
//TODO: will probably need MouseDragged to test properly and know if this works
|
|
setAnchorSelectionIndex(index0);
|
|
leadSelectionIndex = index1;
|
|
|
|
fireDifference(sel, (BitSet) oldSel);
|
|
}
|
|
|
|
/**
|
|
* Removes all intervals in the selection set.
|
|
*/
|
|
public void clearSelection()
|
|
{
|
|
// Find the selected interval.
|
|
int from = sel.nextSetBit(0);
|
|
if (from < 0)
|
|
return; // Empty selection - nothing to do.
|
|
int to = from;
|
|
|
|
int i;
|
|
|
|
for (i = from; i>=0; i=sel.nextSetBit(i+1))
|
|
to = i;
|
|
|
|
sel.clear();
|
|
fireValueChanged(from, to, valueIsAdjusting);
|
|
}
|
|
|
|
/**
|
|
* Fire the change event, covering the difference between the two sets.
|
|
*
|
|
* @param current the current set
|
|
* @param x the previous set, the object will be reused.
|
|
*/
|
|
private void fireDifference(BitSet current, BitSet x)
|
|
{
|
|
x.xor(current);
|
|
int from = x.nextSetBit(0);
|
|
if (from < 0)
|
|
return; // No difference.
|
|
int to = from;
|
|
int i;
|
|
|
|
for (i = from; i >= 0; i = x.nextSetBit(i+1))
|
|
to = i;
|
|
|
|
fireValueChanged(from, to, valueIsAdjusting);
|
|
}
|
|
|
|
/**
|
|
* Clears the current selection and marks a given interval as "selected". If
|
|
* the current selection mode is <code>SINGLE_SELECTION</code> only the
|
|
* index <code>index2</code> is selected.
|
|
*
|
|
* @param anchor the anchor selection index.
|
|
* @param lead the lead selection index.
|
|
*/
|
|
public void setSelectionInterval(int anchor, int lead)
|
|
{
|
|
if (anchor == -1 || lead == -1)
|
|
return;
|
|
if (selectionMode == SINGLE_SELECTION)
|
|
{
|
|
int lo = lead;
|
|
int hi = lead;
|
|
int selected = sel.nextSetBit(0);
|
|
if (selected == lead)
|
|
return; // the selection is not changing
|
|
if (selected >= 0)
|
|
{
|
|
lo = Math.min(lo, selected);
|
|
hi = Math.max(hi, selected);
|
|
}
|
|
if (anchorSelectionIndex >= 0)
|
|
{
|
|
lo = Math.min(lo, anchorSelectionIndex);
|
|
hi = Math.max(hi, anchorSelectionIndex);
|
|
}
|
|
sel.clear();
|
|
sel.set(lead);
|
|
leadSelectionIndex = lead;
|
|
anchorSelectionIndex = lead;
|
|
fireValueChanged(lo, hi);
|
|
}
|
|
else if (selectionMode == SINGLE_INTERVAL_SELECTION)
|
|
{
|
|
// determine the current interval
|
|
int first = sel.nextSetBit(0);
|
|
int last = first;
|
|
if (first >= 0)
|
|
last += (sel.cardinality() - 1);
|
|
|
|
// update the selection
|
|
int lo = Math.min(anchor, lead);
|
|
int hi = Math.max(anchor, lead);
|
|
if (lo == first && hi == last)
|
|
return; // selected interval is not being changed
|
|
sel.clear();
|
|
sel.set(lo, hi + 1);
|
|
|
|
// include the old selection in the event range
|
|
if (first >= 0)
|
|
lo = Math.min(lo, first);
|
|
if (last >= 0)
|
|
hi = Math.max(hi, last);
|
|
if (anchorSelectionIndex >= 0)
|
|
{
|
|
lo = Math.min(lo, anchorSelectionIndex);
|
|
hi = Math.max(hi, anchorSelectionIndex);
|
|
}
|
|
anchorSelectionIndex = anchor;
|
|
leadSelectionIndex = lead;
|
|
fireValueChanged(lo, hi);
|
|
}
|
|
else
|
|
{
|
|
BitSet oldSel = (BitSet) sel.clone();
|
|
sel.clear();
|
|
if (selectionMode == SINGLE_SELECTION)
|
|
anchor = lead;
|
|
|
|
int lo = Math.min(anchor, lead);
|
|
int hi = Math.max(anchor, lead);
|
|
sel.set(lo, hi+1);
|
|
// update the anchorSelectionIndex and leadSelectionIndex variables
|
|
setAnchorSelectionIndex(anchor);
|
|
leadSelectionIndex = lead;
|
|
|
|
fireDifference(sel, oldSel);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Inserts a number of indices either before or after a particular
|
|
* position in the set of indices. Renumbers all indices after the
|
|
* inserted range. The new indices in the inserted range are not
|
|
* selected. This method is typically called to synchronize the selection
|
|
* model with an inserted range of elements in a {@link ListModel}.
|
|
*
|
|
* @param index The position to insert indices at
|
|
* @param length The number of indices to insert
|
|
* @param before Indicates whether to insert the indices before the index
|
|
* or after it
|
|
*/
|
|
public void insertIndexInterval(int index,
|
|
int length,
|
|
boolean before)
|
|
{
|
|
if (!before)
|
|
{
|
|
index++;
|
|
length--;
|
|
}
|
|
BitSet tmp = sel.get(index, sel.size());
|
|
sel.clear(index, sel.size());
|
|
int n = tmp.size();
|
|
for (int i = 0; i < n; ++i)
|
|
sel.set(index + length + i, tmp.get(i));
|
|
}
|
|
|
|
/**
|
|
* Removes a range from the set of indices. Renumbers all indices after
|
|
* the removed range. This method is typically called to synchronize the
|
|
* selection model with a deleted range of elements in a {@link
|
|
* ListModel}.
|
|
*
|
|
* @param index0 The first index to remove (inclusive)
|
|
* @param index1 The last index to remove (inclusive)
|
|
*/
|
|
public void removeIndexInterval(int index0,
|
|
int index1)
|
|
{
|
|
int lo = Math.min(index0, index1);
|
|
int hi = Math.max(index0, index1);
|
|
|
|
BitSet tmp = sel.get(hi, sel.size());
|
|
sel.clear(lo, sel.size());
|
|
int n = tmp.size();
|
|
for (int i = 0; i < n; ++i)
|
|
sel.set(lo + i, tmp.get(i));
|
|
}
|
|
|
|
/**
|
|
* Fires a {@link ListSelectionEvent} to all the listeners of type {@link
|
|
* ListSelectionListener} registered with this selection model to
|
|
* indicate that a series of adjustment has just ended.
|
|
*
|
|
* The values of {@link #getMinSelectionIndex} and
|
|
* {@link #getMaxSelectionIndex} are used in the {@link ListSelectionEvent}
|
|
* that gets fired.
|
|
*
|
|
* @param isAdjusting <code>true</code> if this is the final change
|
|
* in a series of adjustments, <code>false/code> otherwise
|
|
*/
|
|
protected void fireValueChanged(boolean isAdjusting)
|
|
{
|
|
fireValueChanged(getMinSelectionIndex(), getMaxSelectionIndex(),
|
|
isAdjusting);
|
|
}
|
|
|
|
/**
|
|
* Fires a {@link ListSelectionEvent} to all the listeners of type {@link
|
|
* ListSelectionListener} registered with this selection model.
|
|
*
|
|
* @param firstIndex The low index of the changed range
|
|
* @param lastIndex The high index of the changed range
|
|
*/
|
|
protected void fireValueChanged(int firstIndex, int lastIndex)
|
|
{
|
|
fireValueChanged(firstIndex, lastIndex, getValueIsAdjusting());
|
|
}
|
|
|
|
/**
|
|
* Fires a {@link ListSelectionEvent} to all the listeners of type {@link
|
|
* ListSelectionListener} registered with this selection model.
|
|
*
|
|
* @param firstIndex The low index of the changed range
|
|
* @param lastIndex The high index of the changed range
|
|
* @param isAdjusting Whether this change is part of a seqence of adjustments
|
|
* made to the selection, such as during interactive scrolling
|
|
*/
|
|
protected void fireValueChanged(int firstIndex, int lastIndex,
|
|
boolean isAdjusting)
|
|
{
|
|
ListSelectionEvent evt = new ListSelectionEvent(this, firstIndex,
|
|
lastIndex, isAdjusting);
|
|
ListSelectionListener[] listeners = getListSelectionListeners();
|
|
for (int i = 0; i < listeners.length; ++i)
|
|
listeners[i].valueChanged(evt);
|
|
}
|
|
|
|
/**
|
|
* Adds a listener.
|
|
*
|
|
* @param listener The listener to add
|
|
*
|
|
* @see #removeListSelectionListener
|
|
* @see #getListSelectionListeners
|
|
*/
|
|
public void addListSelectionListener(ListSelectionListener listener)
|
|
{
|
|
listenerList.add(ListSelectionListener.class, listener);
|
|
}
|
|
|
|
/**
|
|
* Removes a registered listener.
|
|
*
|
|
* @param listener The listener to remove
|
|
*
|
|
* @see #addListSelectionListener
|
|
* @see #getListSelectionListeners
|
|
*/
|
|
public void removeListSelectionListener(ListSelectionListener listener)
|
|
{
|
|
listenerList.remove(ListSelectionListener.class, listener);
|
|
}
|
|
|
|
/**
|
|
* Returns an array of all registerers listeners.
|
|
*
|
|
* @param listenerType The type of listener to retrieve
|
|
*
|
|
* @return The array
|
|
*
|
|
* @see #getListSelectionListeners
|
|
* @since 1.3
|
|
*/
|
|
public <T extends EventListener> T[] getListeners(Class<T> listenerType)
|
|
{
|
|
return listenerList.getListeners(listenerType);
|
|
}
|
|
|
|
/**
|
|
* Returns an array of all registerd list selection listeners.
|
|
*
|
|
* @return the array
|
|
*
|
|
* @see #addListSelectionListener
|
|
* @see #removeListSelectionListener
|
|
* @see #getListeners
|
|
* @since 1.4
|
|
*/
|
|
public ListSelectionListener[] getListSelectionListeners()
|
|
{
|
|
return (ListSelectionListener[]) getListeners(ListSelectionListener.class);
|
|
}
|
|
|
|
/**
|
|
* Returns a clone of this object.
|
|
* <code>listenerList</code> don't gets duplicated.
|
|
*
|
|
* @return the cloned object
|
|
*
|
|
* @throws CloneNotSupportedException if an error occurs
|
|
*/
|
|
public Object clone()
|
|
throws CloneNotSupportedException
|
|
{
|
|
DefaultListSelectionModel model =
|
|
(DefaultListSelectionModel) super.clone();
|
|
model.sel = (BitSet) sel.clone();
|
|
model.listenerList = new EventListenerList();
|
|
return model;
|
|
}
|
|
}
|