+ * @param[in] handleType One of the handles.
+ * @param[in] active True if the handle should be active.
+ */
+ void SetHandleActive( HandleType handleType,
+ bool active );
+
+ /**
+ * @brief Query whether a handle is active.
+ *
+ * @param[in] handleType One of the handles.
+ *
+ * @return True if the handle is active.
+ */
+ bool IsHandleActive( HandleType handleType ) const;
+
+ /**
+ * @brief Sets the image for one of the handles.
+ *
+ * @param[in] handleType One of the handles.
+ * @param[in] handleImageType A different image can be set for the pressed/released states.