| 1 | package be.nikiroo.utils.ui; |
| 2 | |
| 3 | import java.util.ArrayList; |
| 4 | import java.util.List; |
| 5 | |
| 6 | import javax.swing.JList; |
| 7 | |
| 8 | public class ListSnapshot { |
| 9 | private JList list; |
| 10 | private List<Object> elements = new ArrayList<Object>(); |
| 11 | |
| 12 | public ListSnapshot(JList list) { |
| 13 | this.list = list; |
| 14 | |
| 15 | for (int index : list.getSelectedIndices()) { |
| 16 | elements.add(list.getModel().getElementAt(index)); |
| 17 | } |
| 18 | } |
| 19 | |
| 20 | public void apply() { |
| 21 | applyTo(list); |
| 22 | } |
| 23 | |
| 24 | public void applyTo(JList list) { |
| 25 | List<Integer> indices = new ArrayList<Integer>(); |
| 26 | for (int i = 0; i < list.getModel().getSize(); i++) { |
| 27 | Object newObject = list.getModel().getElementAt(i); |
| 28 | for (Object oldObject : elements) { |
| 29 | if (isSameElement(oldObject, newObject)) { |
| 30 | indices.add(i); |
| 31 | break; |
| 32 | } |
| 33 | } |
| 34 | } |
| 35 | |
| 36 | int a[] = new int[indices.size()]; |
| 37 | for (int i = 0; i < indices.size(); i++) { |
| 38 | a[i] = indices.get(i); |
| 39 | } |
| 40 | list.setSelectedIndices(a); |
| 41 | } |
| 42 | |
| 43 | // You can override this |
| 44 | protected boolean isSameElement(Object oldElement, Object newElement) { |
| 45 | if (oldElement == null || newElement == null) |
| 46 | return oldElement == null && newElement == null; |
| 47 | |
| 48 | return oldElement.toString().equals(newElement.toString()); |
| 49 | } |
| 50 | |
| 51 | @Override |
| 52 | public String toString() { |
| 53 | StringBuilder builder = new StringBuilder(); |
| 54 | builder.append("List Snapshot of: ").append(list).append("\n"); |
| 55 | builder.append("Selected elements:\n"); |
| 56 | for (Object element : elements) { |
| 57 | builder.append("\t").append(element).append("\n"); |
| 58 | } |
| 59 | |
| 60 | return builder.toString(); |
| 61 | } |
| 62 | } |