| /* |
| * Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle 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 2 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 |
| * 2 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package javax.swing; |
| |
| import java.util.*; |
| |
| import java.io.Serializable; |
| |
| /** |
| * The default model for combo boxes. |
| * |
| * @param <E> the type of the elements of this model |
| * |
| * @author Arnaud Weber |
| * @author Tom Santos |
| * @since 1.2 |
| */ |
| @SuppressWarnings("serial") // Superclass is not serializable across versions |
| public class DefaultComboBoxModel<E> extends AbstractListModel<E> implements MutableComboBoxModel<E>, Serializable { |
| Vector<E> objects; |
| Object selectedObject; |
| |
| /** |
| * Constructs an empty DefaultComboBoxModel object. |
| */ |
| public DefaultComboBoxModel() { |
| objects = new Vector<E>(); |
| } |
| |
| /** |
| * Constructs a DefaultComboBoxModel object initialized with |
| * an array of objects. |
| * |
| * @param items an array of Object objects |
| */ |
| public DefaultComboBoxModel(final E items[]) { |
| objects = new Vector<E>(items.length); |
| |
| int i,c; |
| for ( i=0,c=items.length;i<c;i++ ) |
| objects.addElement(items[i]); |
| |
| if ( getSize() > 0 ) { |
| selectedObject = getElementAt( 0 ); |
| } |
| } |
| |
| /** |
| * Constructs a DefaultComboBoxModel object initialized with |
| * a vector. |
| * |
| * @param v a Vector object ... |
| */ |
| public DefaultComboBoxModel(Vector<E> v) { |
| objects = v; |
| |
| if ( getSize() > 0 ) { |
| selectedObject = getElementAt( 0 ); |
| } |
| } |
| |
| // implements javax.swing.ComboBoxModel |
| /** |
| * Set the value of the selected item. The selected item may be null. |
| * |
| * @param anObject The combo box value or null for no selection. |
| */ |
| public void setSelectedItem(Object anObject) { |
| if ((selectedObject != null && !selectedObject.equals( anObject )) || |
| selectedObject == null && anObject != null) { |
| selectedObject = anObject; |
| fireContentsChanged(this, -1, -1); |
| } |
| } |
| |
| // implements javax.swing.ComboBoxModel |
| public Object getSelectedItem() { |
| return selectedObject; |
| } |
| |
| // implements javax.swing.ListModel |
| public int getSize() { |
| return objects.size(); |
| } |
| |
| // implements javax.swing.ListModel |
| public E getElementAt(int index) { |
| if ( index >= 0 && index < objects.size() ) |
| return objects.elementAt(index); |
| else |
| return null; |
| } |
| |
| /** |
| * Returns the index-position of the specified object in the list. |
| * |
| * @param anObject the object to return the index of |
| * @return an int representing the index position, where 0 is |
| * the first position |
| */ |
| public int getIndexOf(Object anObject) { |
| return objects.indexOf(anObject); |
| } |
| |
| // implements javax.swing.MutableComboBoxModel |
| public void addElement(E anObject) { |
| objects.addElement(anObject); |
| fireIntervalAdded(this,objects.size()-1, objects.size()-1); |
| if ( objects.size() == 1 && selectedObject == null && anObject != null ) { |
| setSelectedItem( anObject ); |
| } |
| } |
| |
| // implements javax.swing.MutableComboBoxModel |
| public void insertElementAt(E anObject,int index) { |
| objects.insertElementAt(anObject,index); |
| fireIntervalAdded(this, index, index); |
| } |
| |
| // implements javax.swing.MutableComboBoxModel |
| public void removeElementAt(int index) { |
| if ( getElementAt( index ) == selectedObject ) { |
| if ( index == 0 ) { |
| setSelectedItem( getSize() == 1 ? null : getElementAt( index + 1 ) ); |
| } |
| else { |
| setSelectedItem( getElementAt( index - 1 ) ); |
| } |
| } |
| |
| objects.removeElementAt(index); |
| |
| fireIntervalRemoved(this, index, index); |
| } |
| |
| // implements javax.swing.MutableComboBoxModel |
| public void removeElement(Object anObject) { |
| int index = objects.indexOf(anObject); |
| if ( index != -1 ) { |
| removeElementAt(index); |
| } |
| } |
| |
| /** |
| * Empties the list. |
| */ |
| public void removeAllElements() { |
| if ( objects.size() > 0 ) { |
| int firstIndex = 0; |
| int lastIndex = objects.size() - 1; |
| objects.removeAllElements(); |
| selectedObject = null; |
| fireIntervalRemoved(this, firstIndex, lastIndex); |
| } else { |
| selectedObject = null; |
| } |
| } |
| } |