diff --git a/src/contact-panel.hpp b/src/contact-panel.hpp
new file mode 100644
index 0000000..a7a3241
--- /dev/null
+++ b/src/contact-panel.hpp
@@ -0,0 +1,144 @@
+/* -*- 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_CONTACT_PANEL_HPP
+#define CHRONOS_CONTACT_PANEL_HPP
+
+#include <QDialog>
+#include <QStringListModel>
+#include <QSqlTableModel>
+
+#include "set-alias-dialog.hpp"
+#include "endorse-combobox-delegate.hpp"
+
+#ifndef Q_MOC_RUN
+#endif
+
+namespace Ui {
+class ContactPanel;
+}
+
+namespace chronos {
+
+class ContactPanel : public QDialog
+{
+  Q_OBJECT
+
+public:
+  explicit
+  ContactPanel(QWidget* parent = 0);
+
+  virtual
+  ~ContactPanel();
+
+private:
+  void
+  resetPanel();
+
+signals:
+  void
+  waitForContactList();
+
+  void
+  waitForContactInfo(const QString& identity);
+
+  void
+  removeContact(const QString& identity);
+
+  void
+  updateAlias(const QString& identity, const QString& alias);
+
+  void
+  updateIsIntroducer(const QString& identity, bool isIntro);
+
+  void
+  updateEndorseCertificate(const QString& identity);
+
+  void
+  warning(const QString& msg);
+
+public slots:
+  void
+  onCloseDBModule();
+
+  void
+  onIdentityUpdated(const QString& identity);
+
+  void
+  onContactAliasListReady(const QStringList& aliasList);
+
+  void
+  onContactIdListReady(const QStringList& idList);
+
+  void
+  onContactInfoReady(const QString& identity,
+                     const QString& name,
+                     const QString& institute,
+                     bool isIntro);
+
+private slots:
+  void
+  onSelectionChanged(const QItemSelection& selected,
+                     const QItemSelection& deselected);
+
+  void
+  onContextMenuRequested(const QPoint& pos);
+
+  void
+  onSetAliasDialogRequested();
+
+  void
+  onContactDeletionRequested();
+
+  void
+  onIsIntroducerChanged(int state);
+
+  void
+  onAddScopeClicked();
+
+  void
+  onDeleteScopeClicked();
+
+  void
+  onSaveScopeClicked();
+
+  void
+  onEndorseButtonClicked();
+
+  void
+  onAliasChanged(const QString& identity, const QString& alias);
+
+private:
+  Ui::ContactPanel* ui;
+
+  // Dialogs.
+  SetAliasDialog* m_setAliasDialog;
+
+  // Models.
+  QStringListModel* m_contactListModel;
+  QSqlTableModel*   m_trustScopeModel;
+  QSqlTableModel*   m_endorseDataModel;
+
+  // Delegates.
+  EndorseComboBoxDelegate* m_endorseComboBoxDelegate;
+
+  // Actions.
+  QAction* m_menuAlias;
+  QAction* m_menuDelete;
+
+  // Internal data structure.
+  QStringList m_contactAliasList;
+  QStringList m_contactIdList;
+  QString     m_currentSelectedContact;
+};
+
+} // namespace chronos
+
+#endif // CHRONOS_CONTACT_PANEL_HPP