// ---------------------------------------
// Restricted Focus Viewer (RFV) Program
// Version 2.1
// Language: Java 2
// October, 2000
// Copyright (C) 2000  Anthony R. Jansen 
// ---------------------------------------

// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

// ---------------------------------------
// RFV_Motion_Blur_Thread.java
//
// This class is a thread that stops the
// motion blur from continuing if the
// mouse has stopped moving for longer 
// than a specified time threshold.
// ---------------------------------------

public class RFV_Motion_Blur_Thread extends Thread {

	// Need RFV so that stimulus can be updated
	// ----------------------------------------
	private	RFV	rfv;
	private	boolean	valid;

	// Define threshold
	// ----------------
	private static final long        MOTION_BLUR_THRESHOLD = 50;
	private static final long        QUICK_SLEEP_TIME = 10;

	// Constructor which accepts the RFV as an argument
	// ------------------------------------------------
	public RFV_Motion_Blur_Thread(RFV r)
	{
		rfv = r;
		valid = true;
	}

	// Interrupt thread if it is no longer needed
	// ------------------------------------------
	public void interrupt()
	{
		valid = false;
	}

	// Thread to deactivate motion blur if mouse stops suddenly
	// --------------------------------------------------------
	public void run()
	{
		while (rfv.getElapsedMotionBlurTime() < MOTION_BLUR_THRESHOLD) {
			try {
				this.sleep(QUICK_SLEEP_TIME);
			}
			catch(InterruptedException e) { ; }
		}

		// End the thread and redraw the stimulus
		// --------------------------------------
		if (valid)
			rfv.endMotionBlur();
	}

}