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diff --git a/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/utils/variable/DynamicInteger.java b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/utils/variable/DynamicInteger.java
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+++ b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/utils/variable/DynamicInteger.java
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+/*******************************************************************************
+ * 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.scenegraph.utils.variable;
+
+/**
+ * A container for a single dynamic-enabled integer variable of a scene graph
+ * node. Dynamic-enabled means a variable that potentially has two values: one
+ * static (~ default) and one dynamic. If the dynamic part has a non-null value
+ * it should always be used instead of the static value. Use
+ * {@link #getActiveValue()} to get the current variable value to follow this
+ * policy in your client code.
+ * 
+ * <p>
+ * Variables generally determine the way a node gets rendered.
+ * 
+ * @author Tuukka Lehtonen
+ */
+public class DynamicInteger extends DynamicVariable<Integer> {
+
+    private int value;
+
+    public static DynamicInteger make(int initialValue) {
+        return new DynamicInteger(initialValue);
+    }
+
+    public DynamicInteger(int initialValue) {
+        this.value = initialValue;
+    }
+
+    public int getValue() {
+        return value;
+    }
+
+    public int getActiveValue() {
+        return dynamicValue != null ? dynamicValue : value;
+    }
+
+    /**
+     * Sets the static value of the variable.
+     * 
+     * @param value new static value
+     */
+    public void setValue(int value) {
+        this.value = value;
+    }
+
+    public boolean hasDynamicValue() {
+        return dynamicValue != null && getValue() != getActiveValue();
+    }
+
+}