diff --git a/src/trust-tree-scene.hpp b/src/trust-tree-scene.hpp
new file mode 100644
index 0000000..90be20e
--- /dev/null
+++ b/src/trust-tree-scene.hpp
@@ -0,0 +1,47 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2013, Regents of the University of California
+ *                     Yingdi Yu
+ *
+ * BSD license, See the LICENSE file for more information
+ *
+ * Author: Yingdi Yu <yingdi@cs.ucla.edu>
+ */
+
+#ifndef CHRONOS_TRUST_TREE_SCENE_HPP
+#define CHRONOS_TRUST_TREE_SCENE_HPP
+
+#include <QtGui/QGraphicsScene>
+#include <QColor>
+#include <QMap>
+
+#ifndef Q_MOC_RUN
+#include "trust-tree-node.hpp"
+#include "tree-layout.hpp"
+#endif
+
+class QGraphicsTextItem;
+
+namespace chronos {
+
+class TrustTreeScene : public QGraphicsScene
+{
+  Q_OBJECT
+
+public:
+  TrustTreeScene(QWidget* parent = 0);
+
+  void
+  plotTrustTree(chronos::TrustTreeNodeList& nodeList);
+
+private:
+  void
+  plotEdge(const chronos::TrustTreeNodeList& nodeList, int nodeSize);
+
+  void
+  plotNode(const chronos::TrustTreeNodeList& nodeList, int nodeSize);
+};
+
+} // namespace chronos
+
+#endif // CHRONOS_TRUST_TREE_SCENE_HPP