/*
 * @(#)MotifScrollBarUI.java	1.9 01/11/29
 *
 * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
package com.sun.java.swing.plaf.motif;

import javax.swing.*;
import javax.swing.event.*;
import javax.swing.plaf.*;
import javax.swing.border.*;
import javax.swing.plaf.basic.BasicScrollBarUI;
import javax.swing.plaf.basic.BasicGraphicsUtils;

import java.awt.Dimension;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.Graphics;
import java.awt.Color;


/**
 * Implementation of ScrollBarUI for the Motif Look and Feel
 * <p>
 * <strong>Warning:</strong>
 * Serialized objects of this class will not be compatible with
 * future Swing releases.  The current serialization support is appropriate
 * for short term storage or RMI between applications running the same
 * version of Swing.  A future release of Swing will provide support for
 * long term persistence.
 *
 * @version 1.9 11/29/01
 * @author Rich Schiavi
 * @author Hans Muller
 */
public class MotifScrollBarUI extends BasicScrollBarUI 
{

    public static ComponentUI createUI(JComponent c) {
	return new MotifScrollBarUI();
    }

    public Dimension getPreferredSize(JComponent c) {
	Insets insets = c.getInsets();
	int dx = insets.left + insets.right;
	int dy = insets.top + insets.bottom;
	return (scrollbar.getOrientation() == JScrollBar.VERTICAL)
	    ? new Dimension(dx + 11, dy + 33)
	    : new Dimension(dx + 33, dy + 11);
    }

    protected JButton createDecreaseButton(int orientation) {
	return new MotifScrollBarButton(orientation);
    } 

    protected JButton createIncreaseButton(int orientation) {
	return new MotifScrollBarButton(orientation);
    }
  

    public void paintTrack(Graphics g, JComponent c, Rectangle trackBounds)  {        
        g.setColor(trackColor);
        g.fillRect(trackBounds.x, trackBounds.y, trackBounds.width, trackBounds.height);
    }


    public void paintThumb(Graphics g, JComponent c, Rectangle thumbBounds)  
    {        

	if(thumbBounds.isEmpty() || !scrollbar.isEnabled())	{
	    return;
	}

	int w = thumbBounds.width;
	int h = thumbBounds.height;		

	g.translate(thumbBounds.x, thumbBounds.y);
	g.setColor(thumbColor);
	g.fillRect(0, 0, w-1, h-1);
      
	g.setColor(thumbHighlightColor);
	g.drawLine(0, 0, 0, h-1);
	g.drawLine(1, 0, w-1, 0);
      
	g.setColor(thumbLightShadowColor);
	g.drawLine(1, h-1, w-1, h-1);
	g.drawLine(w-1, 1, w-1, h-2);

	g.translate(-thumbBounds.x, -thumbBounds.y);
    }
}