1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233
| /**
* A sorted model for combo boxes, from the oracle jdk 1.7 code .
*
* @param <E> the type of the elements of this model
*
*/
public class SortedComboBoxModel<E> extends AbstractListModel<E> implements MutableComboBoxModel<E>, Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
Vector<E> objects;
Object selectedObject;
private Comparator<? super E> comparator;
/**
* Constructs an empty DefaultComboBoxModel object.
*/
public SortedComboBoxModel() {
objects = new Vector<E>();
}
/**
* Constructs a DefaultComboBoxModel object initialized with
* an array of objects.
*
* @param items an array of Object objects
*/
public SortedComboBoxModel(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 SortedComboBoxModel(Vector<E> v) {
objects = v;
if ( getSize() > 0 ) {
selectedObject = getElementAt( 0 );
}
}
/**
* Constructs an empty DefaultComboBoxModel object.
*/
public SortedComboBoxModel(Comparator<? super E> comparator) {
this.comparator=comparator;
objects = new Vector<E>();
}
/**
* Constructs a DefaultComboBoxModel object initialized with
* an array of objects.
*
* @param items an array of Object objects
*/
public SortedComboBoxModel(final E items[], Comparator<? super E> comparator) {
this.comparator=comparator;
objects = new Vector<E>(items.length);
int i,c;
for ( i=0,c=items.length;i<c;i++ )
objects.addElement(items[i]);
if ( comparator!=null ) {
Collections.sort(objects, comparator);
}
if ( getSize() > 0 ) {
selectedObject = getElementAt( 0 );
}
}
/**
* Constructs a DefaultComboBoxModel object initialized with
* a vector.
*
* @param v a Vector object ...
*/
public SortedComboBoxModel(Vector<E> v, Comparator<? super E> comparator) {
this.comparator=comparator;
objects = v;
if ( comparator!=null ) {
Collections.sort(objects, comparator);
}
if ( getSize() > 0 ) {
selectedObject = getElementAt( 0 );
}
}
// implements javax.swing.ComboBoxModel
/**
* Set the value of the selected item. The selected item may be null.
* <p>
* @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
* @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) {
if ( comparator!=null ) {
int index = insertSortedElement(anObject);
if ( objects.size() == 1 && selectedObject == null && anObject != null ) {
setSelectedItem( anObject );
}
}
else {
objects.addElement(anObject);
fireIntervalAdded(this,objects.size()-1, objects.size()-1);
if ( objects.size() == 1 && selectedObject == null && anObject != null ) {
setSelectedItem( anObject );
}
}
}
private int insertSortedElement(E anObject) {
int size = getSize();
int index;
for (index = 0; index < size; index++) {
E o = getElementAt( index );
if (comparator.compare(o, anObject) > 0) {
break;
}
}
objects.add(index, anObject);
fireIntervalAdded(this, index, index);
return index;
}
// implements javax.swing.MutableComboBoxModel
public void insertElementAt(E anObject,int index) {
if ( comparator!=null ) {
insertSortedElement(anObject);
}
else {
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;
}
}
} |
Partager