/*
 *                 (C) Copyright 2005 Nilo J. Gonzalez
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser Gereral Public Licence as published by the Free
 * Software Foundation; either version 2 of the Licence, or (at your opinion) any
 * later version.
 * 
 * This library is distributed in the hope that it will be usefull, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of merchantability or fitness for a
 * particular purpose. See the GNU Lesser General Public Licence for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public Licence along
 * with this library; if not, write to the Free Software Foundation, Inc., 59
 * Temple Place, Suite 330, Boston, Ma 02111-1307 USA.
 *
 * http://www.gnu.org/licenses/lgpl.html (English)
 * http://gugs.sindominio.net/gnu-gpl/lgpl-es.html (Espa�ol)
 *
 *
 * Original author: Nilo J. Gonzalez
 */
 
/**
 * Esta clase implementa las barras de scroll.
 * @author Nilo J. Gonzalez
 */ 
 

package com.nilo.plaf.nimrod;

import java.awt.*;
import java.awt.event.MouseEvent;

import javax.swing.*;
import javax.swing.plaf.*;
import javax.swing.plaf.metal.*;



public class NimRODScrollBarUI extends MetalScrollBarUI {
  private boolean clicked;
  private boolean rollOver;
  
  public static ComponentUI createUI( JComponent c)    {
    return new NimRODScrollBarUI();
  }

  protected TrackListener createTrackListener(){
    return new MiML( this);
  }
  
  protected JButton createDecreaseButton( int orientation) {
    decreaseButton = new NimRODScrollButton( orientation, scrollBarWidth, isFreeStanding);
    return decreaseButton;
  }

  protected JButton createIncreaseButton( int orientation) {
    increaseButton =  new NimRODScrollButton( orientation, scrollBarWidth, isFreeStanding);
    return increaseButton;
  }

  
  protected void paintThumb( Graphics g, JComponent c, Rectangle thumbBounds) {
    Color thumbColor = UIManager.getColor( "ScrollBar.thumb");
    Color thumbShadow = UIManager.getColor( "ScrollBar.thumbShadow");
    
    g.translate( thumbBounds.x, thumbBounds.y);
    
    g.setColor( thumbColor);
    g.fillRect( 0, 0, thumbBounds.width - 1, thumbBounds.height - 1 );
 
    g.setColor( (rollOver ? thumbShadow.darker() : thumbShadow ));
    g.drawRect( 0, 0, thumbBounds.width - 1, thumbBounds.height - 1 );
    
    Icon icDecor = null;
    if ( scrollbar.getOrientation() == JScrollBar.HORIZONTAL ) {
      icDecor = UIManager.getIcon( "ScrollBar.horizontalThumbIconImage");
    }
    else {
      icDecor = UIManager.getIcon( "ScrollBar.verticalThumbIconImage");
    }
    
    int w = icDecor.getIconWidth();
    int h = icDecor.getIconHeight();
    int x = (thumbBounds.width - w ) / 2;
    int y = (thumbBounds.height -h ) / 2;

    if ( ((scrollbar.getOrientation() == JScrollBar.HORIZONTAL) && (thumbBounds.width >= w)) 
         ||
         ((scrollbar.getOrientation() == JScrollBar.VERTICAL) && (thumbBounds.height >= h))
        ) {
      icDecor.paintIcon( c, g, x, y);
    }   
    
    g.translate( -thumbBounds.x, -thumbBounds.y);
    
    Graphics2D g2D = (Graphics2D)g;
    GradientPaint grad = null;
    
    Color colA, colB;
    if ( clicked ) {
      colA = NimRODUtils.getSombra();
      colB = NimRODUtils.getBrillo();
    }
    else {
      colA = NimRODUtils.getBrillo();
      colB = NimRODUtils.getSombra();
    }

    if ( scrollbar.getOrientation() == JScrollBar.HORIZONTAL ) {
        grad = new GradientPaint( thumbBounds.x,thumbBounds.y, colA, 
                                  thumbBounds.x,thumbBounds.height, colB);
  	}
    else {
        grad = new GradientPaint( thumbBounds.x,thumbBounds.y, colA, 
                                  thumbBounds.width, thumbBounds.y, colB);
        /*
        ImageIcon icSombra = (ImageIcon)UIManager.getIcon( "BordeGenSup");
        g.drawImage( icSombra.getImage(), thumbBounds.x,thumbBounds.y+thumbBounds.height, 
                                          thumbBounds.width, icSombra.getIconHeight(), null);
                                          */
    }

    g2D.setPaint( grad);
    g2D.fill( thumbBounds);
  }

  protected void paintTrack( Graphics g, JComponent c, Rectangle trackBounds) {
    Graphics2D g2D = (Graphics2D)g;
    GradientPaint grad = null;
    
    if ( scrollbar.getOrientation() == JScrollBar.HORIZONTAL ) {
      grad = new GradientPaint( trackBounds.x,trackBounds.y, NimRODUtils.getSombra(), 
                                trackBounds.x,trackBounds.y + trackBounds.height, NimRODUtils.getBrillo());
  	}
    else {
      grad = new GradientPaint( trackBounds.x,trackBounds.y, NimRODUtils.getSombra(), 
                                trackBounds.x + trackBounds.width, trackBounds.y, NimRODUtils.getBrillo());
    }
    
    g2D.setPaint( grad);
    g2D.fill( trackBounds);
  }
  
  
/////////////////////////////////////
  
  public class MiML extends MetalScrollBarUI.TrackListener {
    NimRODScrollBarUI papi;
    
    public MiML( NimRODScrollBarUI papi) {
      this.papi = papi;
    }
    
    public void mouseEntered( MouseEvent e) {
      super.mouseEntered( e);
      
      papi.rollOver = true;
    }
    
    public void mouseExited( MouseEvent e) {
      super.mouseExited( e);
      
      papi.rollOver = false;
    }
    
    public void mousePressed( MouseEvent e) {
      super.mousePressed( e);
      
      papi.clicked = true;
      scrollbar.repaint();
    }
    
    public void mouseReleased( MouseEvent e) {
      super.mouseReleased( e);
      
      papi.clicked = false;
      scrollbar.repaint();
    }
    
    public void mouseMoved( MouseEvent e) {
      super.mouseMoved( e);
      
      if ( papi.rollOver && !thumbRect.contains( e.getX(), e.getY()) ) {
        rollOver = false;
        scrollbar.repaint();
      }
      else if ( !papi.rollOver && thumbRect.contains( e.getX(), e.getY()) ) {
        papi.rollOver = true;
        scrollbar.repaint();
      } 
    }
    
    public void mouseDragged( MouseEvent e) {
      super.mouseDragged( e);
      
      if ( papi.rollOver && !thumbRect.contains( e.getX(), e.getY()) ) {
        rollOver = false;
        scrollbar.repaint();
      }
      else if ( !papi.rollOver && thumbRect.contains( e.getX(), e.getY()) ) {
        papi.rollOver = true;
        scrollbar.repaint();
      }
    }
  }
}