Tray application for Linux

Change-Id: I55862204ef71f69bc88c79fe2259f7cb8365699a
diff --git a/linux/quit-dialog.h b/linux/quit-dialog.h
new file mode 100644
index 0000000..e6fc7e3
--- /dev/null
+++ b/linux/quit-dialog.h
@@ -0,0 +1,32 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/*
+ * @copyright See LICENCE for copyright and license information.
+ *
+ * @author Ilya Moiseenko <iliamo@ucla.edu>
+ */
+
+#include <QDialog>
+#include <QLabel>
+#include <QDialogButtonBox>
+#include <QPushButton>
+
+#ifndef QUITDIALOG_H
+#define QUITDIALOG_H
+
+class QuitDialog : public QDialog
+{
+    Q_OBJECT
+
+public:
+    QuitDialog(QWidget *parent = 0);
+
+private:
+    QLabel *question;
+    QLabel *information;
+    QDialogButtonBox *buttonBox;
+    QPushButton *confirmButton;
+    QPushButton *noButton;
+    QPushButton *cancelButton;
+};
+
+#endif // QUITDIALOG_H