diff --git a/src/invite-list-dialog.cpp b/src/invite-list-dialog.cpp
new file mode 100644
index 0000000..c46036f
--- /dev/null
+++ b/src/invite-list-dialog.cpp
@@ -0,0 +1,85 @@
+/* -*- 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>
+ */
+
+#include "invite-list-dialog.h"
+#include "ui_invite-list-dialog.h"
+
+using namespace std;
+
+InviteListDialog::InviteListDialog(QWidget *parent) 
+  :QDialog(parent)
+  , ui(new Ui::InviteListDialog)
+  , m_contactListModel(new QStringListModel)
+{
+  ui->setupUi(this);
+
+  ui->contactListView->setModel(m_contactListModel);
+
+  connect(ui->inviteButton, SIGNAL(clicked()),
+	  this, SLOT(onInviteClicked()));
+  connect(ui->cancelButton, SIGNAL(clicked()),
+	  this, SLOT(onCancelClicked()));
+}
+
+InviteListDialog::~InviteListDialog()
+{
+  delete ui;
+  delete m_contactListModel;
+}
+
+void
+InviteListDialog::setInviteLabel(string label)
+{ 
+  string msg("invite to chatroom:\n");
+  msg += label;
+  ui->inviteLabel->setText(QString::fromStdString(msg));
+}
+
+void
+InviteListDialog::onInviteClicked()
+{
+  QModelIndexList selected = ui->contactListView->selectionModel()->selectedIndexes();
+  QString alias = m_contactListModel->data(selected.first(), Qt::DisplayRole).toString();
+
+  for(int i = 0; i < m_contactAliasList.size(); i++) // TODO:: could be optimized without using for loop.
+    {
+      if(alias == m_contactAliasList[i])
+        {
+          emit sendInvitation(m_contactIdList[i]);
+          break;
+        }
+    }
+
+  this->close();
+}
+
+void
+InviteListDialog::onCancelClicked()
+{
+  this->close();
+}
+
+void
+InviteListDialog::onContactAliasListReady(const QStringList& aliasList)
+{
+  m_contactAliasList = aliasList;
+  m_contactListModel->setStringList(m_contactAliasList);
+}
+
+void
+InviteListDialog::onContactIdListReady(const QStringList& idList)
+{
+  m_contactIdList = idList;
+}
+
+#if WAF
+#include "invite-list-dialog.moc"
+#include "invite-list-dialog.cpp.moc"
+#endif