/* All user scripts should derive from the base "Application" class */

require ("Application");

/* Get the Gamma library functions and methods for ODBC and/or
 * Windows programming.  Uncomment either or both. */

//require ("WindowsSupport");
//require ("ODBCSupport");

/* Applications share the execution thread and the global name
 * space, so we create a class that contains all of the functions
 * and variables for the application.  This does two things:
 *   1) creates a private name space for the application, and
 *   2) allows you to re-load the application to create either
 *      a new unique instance or multiple instances without
 *      damaging an existing running instance.
 */
class TimeStampTag Application
{
	
	count = 0;
}

/* Use methods to create functions outside the 'main line'. */
method TimeStampTag.average ()
{
	local tagAverage;
	
	.count = .count+1;
	
	//CALCULATE THE AVERAGE
	tagAverage = ($DataSim:Ramp)/.count;
	
	//WRITE IT OUT TO A NEW TAG
	datahub_write("DataSim:Ramp_Average", tagAverage);
}

/* Write the 'main line' of the program here. */
method TimeStampTag.constructor ()
{
	//CALL average EACH TIME THE TAG CHANGES
	.OnChange(#$DataSim:Ramp, `(@self).average());
}

/* Any code to be run when the program gets shut down. */
method TimeStampTag.destructor ()
{
}

/* Start the program by instantiating the class.  If your
 * constructor code does not create a persistent reference to
 * the instance (self), then it will be destroyed by the
 * garbage collector soon after creation.  If you do not want
 * this to happen, assign the instance to a global variable, or
 * create a static data member in your class to which you assign
 * 'self' during the construction process.  ApplicationSingleton()
 * does this for you automatically. */
ApplicationSingleton (TimeStampTag);