/**
* 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.SingleTaggable;
import com.cedarsoft.tags.Tag;
import com.cedarsoft.tags.TagObservable;
import com.cedarsoft.tags.TagProvider;
import com.cedarsoft.tags.Taggable;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import javax.swing.ComboBoxModel;
import javax.swing.event.ListDataEvent;
import javax.swing.event.ListDataListener;
/**
* ComboboxModel prsenting tags
*/
public class TagComboBoxModel extends TagListModel implements ComboBoxModel {
@NotNull
private final SingleTaggable taggable = new SingleTaggable( this );
public TagComboBoxModel( @NotNull TagObservable availableTags ) {
this( availableTags, true );
}
public TagComboBoxModel( @NotNull TagObservable availableTags, boolean nullable ) {
super( availableTags, nullable );
}
/**
* Returns a taggable representing the selection
*
* @return the selection
*/
@NotNull
public Taggable getSelectionTaggable() {
return taggable;
}
@Override
public void setSelectedItem( @Nullable Object anItem ) {
//noinspection ObjectEquality
if ( anItem == getSelectedItem() ) {
return;
}
@Nullable
final Tag newTag;
if ( anItem == null || anItem instanceof Tag ) {
newTag = ( Tag ) anItem;
} else if ( anItem instanceof String ) {
if ( ( ( CharSequence ) anItem ).length() == 0 ) {
newTag = null;
} else {
newTag = getTagProvider().getTag( ( String ) anItem );
}
} else {
throw new IllegalStateException( "???? " + anItem.getClass().getName() );
}
taggable.setSelectedTag( newTag );
if ( !listeners.isEmpty() ) {
ListDataEvent event = new ListDataEvent( this, ListDataEvent.CONTENTS_CHANGED, -1, -1 );
for ( ListDataListener listener : listeners ) {
listener.contentsChanged( event );
}
}
}
@NotNull
private TagProvider getTagProvider() {
if ( availableTags instanceof TagProvider ) {
return ( TagProvider ) availableTags;
} else {
throw new IllegalStateException( "Can't create tags - need a tag provider" );
}
}
@Override
@Nullable
public Tag getSelectedItem() {
return taggable.getSelectedTag();
}
}