+ /**
+ * @brief This signal is emitted when key event is received.
+ *
+ * A callback of the following type may be connected:
+ * @code
+ * void YourCallbackName(const KeyEvent& event);
+ * @endcode
+ * @return The signal to connect to
+ */
+ KeyEventSignalType& KeyEventSignal();
+
+ /**
+ * @brief This signal is emitted when key event is received.
+ *
+ * A callback of the following type may be connected:
+ * @code
+ * bool YourCallbackName(const KeyEvent& event);
+ * @endcode
+ * @return The signal to connect to
+ */
+ KeyEventGeneratedSignalType& KeyEventGeneratedSignal();
+
+ /**
+ * @brief This signal is emitted when the screen is touched and when the touch ends
+ * (i.e. the down & up touch events only).
+ *
+ * If there are multiple touch points, then this will be emitted when the first touch occurs and
+ * then when the last finger is lifted.
+ * An interrupted event will also be emitted (if it occurs).
+ * A callback of the following type may be connected:
+ * @code
+ * void YourCallbackName( TouchData event );
+ * @endcode
+ * @return The touch signal to connect to
+ * @note Motion events are not emitted.
+ */
+ TouchSignalType& TouchSignal();
+
+ /**
+ * @brief This signal is emitted when wheel event is received.
+ *
+ * A callback of the following type may be connected:
+ * @code
+ * void YourCallbackName(const WheelEvent& event);
+ * @endcode
+ * @return The signal to connect to
+ */
+ WheelEventSignalType& WheelEventSignal();
+