/**
* Copyright (C) cedarsoft GmbH.
*
* Licensed under the GNU General Public License version 3 (the "License")
* with Classpath Exception; you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.cedarsoft.org/gpl3ce
* (GPL 3 with Classpath Exception)
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 3 only, as
* published by the Free Software Foundation. cedarsoft GmbH designates this
* particular file as subject to the "Classpath" exception as provided
* by cedarsoft GmbH in the LICENSE file that accompanied this code.
*
* This code 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
* version 3 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 3 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact cedarsoft GmbH, 72810 Gomaringen, Germany,
* or visit www.cedarsoft.com if you need additional information or
* have any questions.
*/
package com.cedarsoft.tags.ui;
import com.cedarsoft.tags.Tag;
import com.cedarsoft.tags.TagChangeListener;
import com.cedarsoft.tags.TagObservable;
import com.cedarsoft.tags.TagProvider;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import javax.swing.ListModel;
import javax.swing.event.ListDataEvent;
import javax.swing.event.ListDataListener;
import java.util.ArrayList;
import java.util.List;
/**
* <p/>
* Date: May 3, 2007<br>
* Time: 2:21:23 PM<br>
*/
public class TagListModel implements ListModel {
protected final List<ListDataListener> listeners = new ArrayList<ListDataListener>();
@NotNull
protected final TagObservable availableTags;
private boolean nullable;
public TagListModel( @NotNull TagProvider availableTags ) {
this( availableTags, false );
}
public TagListModel( @NotNull TagObservable availableTags, boolean nullable ) {
this.availableTags = availableTags;
this.nullable = nullable;
availableTags.addTagChangeListener( new TagChangeListener() {
@Override
public void tagChanged( @NotNull TagChangeEvent event ) {
notifyTagChanged( event );
}
} );
}
public boolean isNullable() {
return nullable;
}
@Override
public int getSize() {
if ( nullable ) {
return availableTags.getTags().size() + 1;
} else {
return availableTags.getTags().size();
}
}
@Override
@Nullable
public Tag getElementAt( int index ) {
if ( index < 0 ) {
throw new IllegalArgumentException( "invalid index " + index );
}
if ( nullable ) {
if ( index == 0 ) {
return null;
}
return availableTags.getTags().get( index - 1 );
} else {
List<? extends Tag> tags = availableTags.getTags();
if ( tags.size() <= index ) {
return null;
} else {
return tags.get( index );
}
}
}
@Override
public void addListDataListener( @NotNull ListDataListener l ) {
listeners.add( l );
}
@Override
public void removeListDataListener( @NotNull ListDataListener l ) {
listeners.remove( l );
}
protected void notifyTagChanged( @NotNull TagChangeListener.TagChangeEvent event ) {
if ( listeners.isEmpty() ) {
return;
}
int type;
int index0;
int index1;
switch ( event.getType() ) {
case ADD:
type = ListDataEvent.INTERVAL_ADDED;
index0 = event.getIndex();
index1 = event.getIndex();
break;
case REMOVE:
type = ListDataEvent.INTERVAL_REMOVED;
index0 = event.getIndex();
index1 = event.getIndex();
break;
default:
throw new IllegalStateException( "Uups" );
}
ListDataEvent listDataEvent = new ListDataEvent( this, type, index0, index1 );
for ( ListDataListener listener : listeners ) {
listener.contentsChanged( listDataEvent );
}
}
@NotNull
public TagObservable getAvailableTags() {
return availableTags;
}
}