Refactor utilities package.

src/utilities/Locker.h

@@ -0,0 +1,26 @@
+#ifndef LOCKER_H
+#define LOCKER_H
+
+#include <QObject>
+
+class QTimer;
+class Locker : public QObject
+{
+    Q_OBJECT
+public:
+    static Locker* getInstance();
+    void start();
+    void setTimer(int aInterval);
+
+public slots:
+    void refreshTimer();
+    void coverScreen();
+private:
+    Locker();
+    ~Locker();
+
+    QTimer* mScreenTimer;
+    int mCounter;
+};
+
+#endif // LOCKER_H