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diff --git a/bundles/org.simantics.g2d/src/org/simantics/g2d/tooltip/TerminalTooltipParticipant.java b/bundles/org.simantics.g2d/src/org/simantics/g2d/tooltip/TerminalTooltipParticipant.java
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+++ b/bundles/org.simantics.g2d/src/org/simantics/g2d/tooltip/TerminalTooltipParticipant.java
@@ -0,0 +1,64 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.g2d.tooltip;
+
+import java.awt.geom.Point2D;
+
+import org.simantics.g2d.canvas.impl.DependencyReflection.Dependency;
+import org.simantics.g2d.diagram.participant.pointertool.PointerInteractor;
+import org.simantics.g2d.diagram.participant.pointertool.TerminalUtil.TerminalInfo;
+import org.simantics.g2d.element.ElementHints;
+import org.simantics.g2d.element.handler.TerminalData;
+import org.simantics.scenegraph.g2d.events.EventHandlerReflection.EventHandler;
+import org.simantics.scenegraph.g2d.events.MouseEvent.MouseMovedEvent;
+import org.simantics.utils.datastructures.hints.IHintContext.Key;
+import org.simantics.utils.datastructures.hints.IHintContext.KeyOf;
+
+
+/**
+ * TooltipParticipan that is able to show terminal tooltips
+ * 
+ * Note: this participant does not co-operate with TooltipParticipant.
+ * 
+ * 
+ * @author Marko Luukkainen <marko.luukkainen@vtt.fi>
+ *
+ */
+public class TerminalTooltipParticipant extends BaseTooltipParticipant {
+
+    public static final Key KEY_TOOLTIP_TEXT = new KeyOf(String.class, "TERMINAL_TOOLTIP_TEXT");
+
+    @Dependency PointerInteractor interactor;
+
+    @EventHandler(priority = 0)
+    public boolean handleMove(MouseMovedEvent me) {
+        update(me.controlPosition);
+        return false;
+    }
+
+    private void update(Point2D controlPos) {
+        TerminalInfo info = interactor.pickTerminal(controlPos);
+
+        if (info != null) {
+            TerminalData data = info.e.getElementClass().getAtMostOneItemOfClass(TerminalData.class);
+            if (data == null)
+                return;
+
+            String text = data.getHint(info.e, info.t, ElementHints.KEY_TEXT);
+            // this is not a really good way to provide terminal name
+            info.e.setHint(KEY_TOOLTIP_TEXT, text);
+            showTooltipFor(info.e);
+        } else
+            hideTooltip();
+    }
+
+}