|
1
11 package org.eclipse.debug.internal.ui.viewers;
12
13 import java.util.ArrayList  ;
14
15 import org.eclipse.debug.internal.ui.viewers.provisional.IModelChangedListener;
16 import org.eclipse.debug.internal.ui.viewers.provisional.IModelDelta;
17 import org.eclipse.jface.viewers.TreePath;
18 import org.eclipse.jface.viewers.TreeSelection;
19
20
25 public class TreeUpdatePolicy extends AbstractUpdatePolicy implements IModelChangedListener {
26
27 private TreePath fTreePath;
29 private IModelDelta fNode;
30
31 public void modelChanged(IModelDelta delta) {
32 updateNodes(new IModelDelta[] { delta });
33 fTreePath = null;
34 fNode = null;
35 }
36
37 protected void updateNodes(IModelDelta[] nodes) {
38 AsynchronousTreeViewer viewer = (AsynchronousTreeViewer) getViewer();
39 if (viewer == null) {
40 return;
41 }
42
43 for (int i = 0; i < nodes.length; i++) {
44 IModelDelta node = nodes[i];
45 int flags = node.getFlags();
46
47 if ((flags & IModelDelta.ADDED) != 0) {
48 handleAdd(viewer, node);
49 }
50 if ((flags & IModelDelta.REMOVED) != 0) {
51 handleRemove(viewer, node);
52 }
53 if ((flags & IModelDelta.CONTENT) != 0) {
54 handleContent(viewer, node);
55 }
56 if ((flags & IModelDelta.EXPAND) != 0) {
57 handleExpand(viewer, node);
58 }
59 if ((flags & IModelDelta.SELECT) != 0) {
60 handleSelect(viewer, node);
61 }
62 if ((flags & IModelDelta.STATE) != 0) {
63 handleState(viewer, node);
64 }
65 if ((flags & IModelDelta.INSERTED) != 0) {
66 }
68 if ((flags & IModelDelta.REPLACED) != 0) {
69 }
71
72 updateNodes(node.getNodes());
73 }
74 }
75
76 protected void handleState(AsynchronousTreeViewer viewer, IModelDelta delta) {
77 viewer.update(delta.getElement());
78 }
79
80 protected void handleSelect(AsynchronousTreeViewer viewer, IModelDelta delta) {
81 viewer.setSelection(new TreeSelection(getTreePath(delta)));
82 }
83
84 protected void handleExpand(AsynchronousTreeViewer viewer, IModelDelta delta) {
85 viewer.expand(new TreeSelection(getTreePath(delta)));
86 }
87
88 protected void handleContent(AsynchronousTreeViewer viewer, IModelDelta delta) {
89 viewer.refresh(delta.getElement());
90 }
91
92 protected void handleRemove(AsynchronousTreeViewer viewer, IModelDelta delta) {
93 viewer.remove(getTreePath(delta));
94 }
95
96 protected void handleAdd(AsynchronousTreeViewer viewer, IModelDelta delta) {
97 viewer.add(getTreePath(delta));
98 }
99
100 protected TreePath getTreePath(IModelDelta node) {
101 if (node != fNode) {
102 ArrayList list = new ArrayList ();
103 list.add(0, node.getElement());
104 while (node.getParent() != null) {
105 node = node.getParent();
106 list.add(0, node.getElement());
107 }
108
109 fTreePath = new TreePath(list.toArray());
110 fNode = node;
111 }
112 return fTreePath;
113 }
114
115 }
116 |
Popular Tags |
Java API By Example, From Geeks To Geeks.