package ch.werner_randelshofer.gui;

/*
Copyright (C) 1999 Werner Randelshofer
werner.randelshofer@mythen.ch
http://www.mythen.ch/w.randelshofer/
    
Permission to use this release of MovieSlider is hereby
granted without fee provided that the complete copyright
notice and this permission notice appear in all copies
and in supporting documentation.
*/

import java.awt.Canvas;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Event;
import ch.werner_randelshofer.gui.event.ChangeListener;
import ch.werner_randelshofer.gui.event.ChangeEvent;
import ch.werner_randelshofer.gui.event.EventListenerList;
import ch.werner_randelshofer.gui.model.BoundedRangeModel;
import ch.werner_randelshofer.gui.model.DefaultBoundedRangeModel;

/**
@author	Werner Randelshofer, Staldenmattweg 2, CH-6405 Immensee, Switzerland
@version	1999-02-28	Created.
*/
public class MovieSlider
extends HorizontalSlider
	{
	private int progressPos_;
	private BoundedRangeModel progressModel_;
		
	public MovieSlider()
		{
		setBackground(Color.lightGray);
		setThumbWidth(8);
		setThumbHeight(14);
		}
	
	public synchronized void setProgressModel(BoundedRangeModel brm)
		{
		if (progressModel_ != null)
			{ progressModel_.removeChangeListener(this); }
		progressModel_ = brm;
		if (progressModel_ != null)
			{ progressModel_.addChangeListener(this); }
		}
	public BoundedRangeModel getProgressModel()
		{
		return progressModel_;
		}

	
	public void update(Graphics g)
		{
		Dimension s = size();
		int thumbWidth = getThumbWidth();

		if (computeProgressPos() < progressPos_)
			{
			int halfThumb = thumbWidth/2;
			g.setColor(getBackground());
			g.fillRect(halfThumb+2,6,s.width-halfThumb-2,s.height-11);
			}

		g.setColor(getBackground());
		g.fillRect(thumbPos_-thumbWidth/2,1,thumbWidth+1,s.height-2);
		g.setColor(getForeground());

		paint(g);
		}
	public void paint(Graphics g)
		{
		int thumbWidth = getThumbWidth();
		int halfThumb = thumbWidth/2;
		int thumbPos = computeThumbPos();
		int progressPos = computeProgressPos();
		thumbPos_ = thumbPos;
		progressPos_ = progressPos;
		Dimension s = size();
		
		// slider border
		g.drawRect(0,0,s.width-1,s.height-1);
		
		// bar border
		g.drawRect(halfThumb,4,s.width-thumbWidth-1,s.height-9);
		
		// slider highlight
		g.setColor(Color.white);
		g.drawLine(1,1,s.width-2,1);
		g.drawLine(1,2,1,s.height-2);
		
		// bar highlight
		g.drawLine(halfThumb+1,5,s.width-halfThumb-3,5);
		g.drawLine(halfThumb+1,6,halfThumb+1,s.height-6);
		
		// progress bar
		g.setColor(Color.gray);
		g.fillRect(halfThumb+2,6,progressPos,s.height-11);
		
		// thumb
		g.setColor(Color.white);
		g.drawRect(thumbPos-halfThumb+1,1,thumbWidth-2,s.height-3);
		g.setColor(getForeground());
		g.drawRect(thumbPos-halfThumb,0,thumbWidth,s.height-1);
		g.drawRect(thumbPos-halfThumb+2,2,thumbWidth-4,s.height-5);
		}

	protected int computeProgressPos()
		{
		int halfThumb = getThumbWidth() / 2;
		BoundedRangeModel m = progressModel_;
		int width = size().width - getThumbWidth()-3;
		if (m == null)
			{ return width; }
		float thumbPos = m.getValue() / (float)((m.getMaximum() - m.getMinimum()));
		return (int)(width * thumbPos);
		}

	public void stateChanged(ChangeEvent event)
		{
		BoundedRangeModel progress = progressModel_;
		if (progress != null && event.getSource() == progress)
			{
			if (computeProgressPos() != progressPos_)
				{ repaint(); }
			}
		else
			{
			super.stateChanged(event);
			}
		}
	}