Manage ToolTip on Tree

src/main/java/fr/soleil/comete/swt/Tree.java

@@ -34,6 +34,8 @@ import org.eclipse.swt.graphics.Rectangle;
 import org.eclipse.swt.layout.FillLayout;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Event;
+import org.eclipse.swt.widgets.Listener;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.TreeItem;
 
@@ -74,11 +76,34 @@ public class Tree extends CometeComposite<org.eclipse.swt.widgets.Tree> implemen
 
     @Override
     protected org.eclipse.swt.widgets.Tree initControl(int childStyle) {
-        org.eclipse.swt.widgets.Tree tree = new org.eclipse.swt.widgets.Tree(this, childStyle);
+        final org.eclipse.swt.widgets.Tree tree = new org.eclipse.swt.widgets.Tree(this, childStyle);
         tree.addSelectionListener(this);
+        tree.addListener(SWT.MouseMove, new Listener() {
+            public void handleEvent(Event event) {
+                ITreeNode treeNode = getTreeNode(event.x, event.y);
+                if (treeNode != null) {
+                    tree.setToolTipText(treeNode.getToolTip());
+                } else {
+                    tree.setToolTipText(null);
+                }
+            }
+        });
         return tree;
     }
 
+    private ITreeNode getTreeNode(int x, int y) {
+        ITreeNode treeNode = null;
+        if ((getControl() != null) && !getControl().isDisposed()) {
+            org.eclipse.swt.widgets.Tree tree = getControl();
+            Point point = new Point(x, y);
+            TreeItem item = tree.getItem(point);
+            if (item != null) {
+                treeNode = TreeNodeTool.findTreeNodeForTreeItem(item, rootNode);
+            }
+        }
+        return treeNode;
+    }
+
     @Override
     public ITreeNode getRootNode() {
         return rootNode;
@@ -94,7 +119,6 @@ public class Tree extends CometeComposite<org.eclipse.swt.widgets.Tree> implemen
                     if (!getControl().isDisposed()) {
                         // remove all nodes to keep a single root, as swt allows multiple roots
                         getControl().removeAll();
-
                         TreeNodeTool.createRootTreeNode(getControl(), aRootNode);
                         rootNode = aRootNode;
                     }
@@ -126,14 +150,12 @@ public class Tree extends CometeComposite<org.eclipse.swt.widgets.Tree> implemen
                 @Override
                 public void run() {
                     if (!getControl().isDisposed()) {
-                        // remove all nodes to keep a single root, as swt allows multiple roots
-                        TreeItem parentItem = getControl().getParentItem();
-                        if (parentItem != null) {
-                            parentItem.setExpanded(expend);
+                        TreeItem topItem = getControl().getTopItem();
+                        if (topItem != null) {
+                            topItem.setExpanded(expend);
                         }
                     }
                 }
-
             });
         }
     }