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

require ("Application");

/*  This script will wait until the value of DataSim:Amplitude changes
 *  and then it will wait 10 seconds and write to DataSim:Test
 *  You can change the tag names and the delay timer.
 */
class DelayedWrite Application
{
}

method DelayedWrite.timeDelay (newValue)
{
	//write takes a full tag name and a value
	//replace DataSim:Test with the tag that we write to
	datahub_write("DataSim:Test", newValue);
}

method DelayedWrite.valueChanged ()
{
	//we will write to a new tag after some time period
	//10 is in seconds, this can be changed		
	.TimerAfter(10, `(@self).timeDelay(@value));
}

/* Write the 'main line' of the program here. */
method DelayedWrite.constructor ()
{
	//replace DataSim:Amplitude with the tag that will be changing
	.OnChange( symbol("DataSim:Amplitude"), `(@self).valueChanged());

}

/* Any code to be run when the program gets shut down. */
method DelayedWrite.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 (DelayedWrite);