ATCS/src/com/gpl/rpg/atcontentstudio/ui/JMovingIdler.java

package com.gpl.rpg.atcontentstudio.ui;

import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Paint;

import javax.swing.JComponent;


public class JMovingIdler extends JComponent {

	private static final long serialVersionUID = -2980521421870322717L;
	
	int position = 0;
	boolean destroyed=false, running=false;
	Thread moverThread = new Thread(){
		public void run() {
			while (!destroyed) {
				boolean back = false;
				while (running) {
					if (back) {
						position = --position % 100;
						if (position == 0) {
							back = false;
						}
					} else {
						position = ++position % 100;
						if (position == 99) {
							back = true;
						}
					}
					try {
						sleep(10);
					} catch (InterruptedException e) {}
					JMovingIdler.this.revalidate();
					JMovingIdler.this.repaint();
				}
			}
		}
	};
	
	public void start() {
		if (!moverThread.isAlive()) {
			moverThread.start();
		}
		running = true;
	}
	
	public void stop() {
		running = false;
	}
	
	public void destroy() {
		destroyed = true;
		running = false;
		try {
			moverThread.join();
		} catch (InterruptedException e) {}
	}
	
	protected void paintComponent(Graphics g) {
		super.paintComponent(g);
		Graphics2D g2 = (Graphics2D) g;
		int w = this.getWidth();
		int h = this.getHeight();
		
		g2.setColor(getBackground());
		g2.fillRect(0,0,w,h);
		
		int x = w * position / 100;
		
		Paint p = new GradientPaint(x - (w/8), 0, getBackground(), x , 0, getForeground()); 
		g2.setPaint(p);
		g2.fillRect(Math.max(0,x-(w/8)),0, Math.min(x, w), h);

		p = new GradientPaint(x, 0, getForeground(), x + (w/8), 0, getBackground()); 
		g2.setPaint(p);
		g2.fillRect(Math.max(0,x),0, Math.min(x+(w/8), w), h);
		
		g2.setColor(Color.BLACK);
		g2.drawLine(0,0,0,h);
		g2.drawLine(0,0,w,0);
		g2.drawLine(w,0,w,h);
		g2.drawLine(0,h,w,h);
	}
	
	@Override
	public void setVisible(boolean aFlag) {
		super.setVisible(aFlag);
		if (!aFlag) destroy();
	}
	
}