Refactored drawing code into Drawing class.

xpcPlugin/Drawing.h

@@ -0,0 +1,55 @@
+//Copyright (c) 2013-2015 United States Government as represented by the Administrator of the
+//National Aeronautics and Space Administration. All Rights Reserved.
+#ifndef XPC_DRAWING_H
+#define XPC_DRAWING_H
+
+#include <stdlib.h>
+#include "xplaneConnect.h"
+
+namespace XPC
+{
+	/// Handles tasks that involve drawing to the screen in X-Plane.
+	///
+	/// \author Jason Watkins
+	/// \version 1.0
+	/// \since 1.0
+	/// \date Intial Version: 2015-04-10
+	/// \date Last Updated: 2015-04-10
+	class Drawing
+	{
+	public:
+		/// Clears the current message on the screen if any and unregisters the
+		/// draw callback for message drawing.
+		static void ClearMessage();
+
+		/// Sets the message to be drawn on the screen.
+		///
+		/// \param x   The x coordinate of the message relative to the left edge
+		///            of the screen.
+		/// \param y   The y coordinate of the message relative to the bottom
+		///            edge of the screen
+		/// \param msg A C string containing the message to display. The message
+		///            value is copied into a local buffer.
+		static void SetMessage(int x, int y, char* msg);
+
+		/// Adds the given waypoints to the list of waypoints to draw.
+		///
+		/// \param points    A pointer to an array of waypoints.
+		/// \param numPoints The number of points in the array.
+		static void AddWaypoints(Waypoint points[], size_t numPoints);
+
+		/// Removes all waypoints and unregisters the callback for waypoint
+		/// drawing.
+		static void ClearWaypoints();
+
+		/// Removes the given waypoints from the list of waypoints to draw.
+		/// If all waypoints are removed as a result of this action, unregisters
+		/// the callback for waypoint drawing.
+		///
+		/// \param points    A pointer to an array of waypoints.
+		/// \param numPoints The number of points in the array.
+		static void RemoveWaypoints(Waypoint points[], size_t numPoints);
+	};
+}
+
+#endif