ecmascript:

//  inputOnly events are handled by functions,
//  initializeOnly fields are variable objects,
//  outputOnly events are sent by setting values

function initialize ()
{
	tracePrint ('initialize (); enabled=' + touchSensor.enabled);
}

// trigger on isActive to filter touchTime events when unclicking

function checkClicks (value, timestamp)  // activated from TouchSensorNode.isActive
{
	if (value == false) // doubleClick isActive=false events
	{
		if (isActive == true) // need to unclick
		{
			isActive  = false;	// send output events
			touchTime = timestamp;
			tracePrint ('DoubleClick isActive=false;');
		}
		return;
	}
	priorTouchTime = currentTouchTime;
	currentTouchTime = timestamp;
	computedDelay = (currentTouchTime - priorTouchTime);

	if      (priorTouchTime == -1)
	{
		tracePrint ('priorTouchTime == -1, return;');
		return;
	}
	else if (computedDelay <= maxDelayInterval)
	{
		tracePrint ('computedDelay=' + computedDelay + ', DoubleClick isActive=true;');

		isActive  = true;	// send output events
		touchTime = timestamp;
		hitPoint_changed    = touchSensor.hitPoint_changed;
		hitNormal_changed   = touchSensor.hitNormal_changed;
		hitTexCoord_changed = touchSensor.hitTexCoord_changed;
	}
	else
	{
		tracePrint ('computedDelay=' + computedDelay + ', single click');
		return;
	}

}
function set_description (newDescription)
{
    description = newDescription;
}
function tracePrint (outputString)
{
	if (traceEnabled) Browser.println ('[DoubleClickTouchSensor] ' + outputString);
}