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/*
* Copyright (c) 2002 and later by MH Software-Entwicklung. All Rights Reserved.
*  
* JTattoo is multiple licensed. If your are an open source developer you can use
* it under the terms and conditions of the GNU General Public License version 2.0
* or later as published by the Free Software Foundation.
*  
* see: gpl-2.0.txt
* 
* If you pay for a license you will become a registered user who could use the
* software under the terms and conditions of the GNU Lesser General Public License
* version 2.0 or later with classpath exception as published by the Free Software
* Foundation.
* 
* see: lgpl-2.0.txt
* see: classpath-exception.txt
* 
* Registered users could also use JTattoo under the terms and conditions of the 
* Apache License, Version 2.0 as published by the Apache Software Foundation.
*  
* see: APACHE-LICENSE-2.0.txt
*/

package com.jtattoo.plaf;

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Composite;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;

import javax.swing.Icon;
import javax.swing.plaf.basic.BasicArrowButton;

/**
 * @author Michael Hagen
 */
public class BaseScrollButton extends BasicArrowButton {

  protected int buttonWidth = 24;

  public BaseScrollButton(int direction, int width) {
    super(direction);
    buttonWidth = width;
  }

  public void paint(Graphics g) {
    boolean isPressed = getModel().isPressed();
    boolean isRollover = getModel().isRollover();

    int width = getWidth();
    int height = getHeight();

    Color colors[];
    if (isPressed) {
      colors = AbstractLookAndFeel.getTheme().getPressedColors();
    }
    else if (isRollover) {
      colors = AbstractLookAndFeel.getTheme().getRolloverColors();
    }
    else {
      colors = AbstractLookAndFeel.getTheme().getButtonColors();
    }

    boolean inverse = ColorHelper.getGrayValue(colors) < 128;

    Color frameColorHi = ColorHelper.brighter(colors[0], 20);
    Color frameColorLo = ColorHelper.darker(colors[colors.length - 1], 20);

    Graphics2D g2D = (Graphics2D) g;
    Composite savedComposite = g2D.getComposite();
    if ((getDirection() == NORTH) || (getDirection() == SOUTH)) {
      JTattooUtilities.fillVerGradient(g2D, colors, 0, 0, width, height);
    }
    else {
      JTattooUtilities.fillHorGradient(g2D, colors, 0, 0, width, height);
    }
    g2D.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.8f));
    if (getDirection() == NORTH) {
      Icon upArrow = inverse ? BaseIcons.getUpArrowInverseIcon() : BaseIcons.getUpArrowIcon();
      int x = (width / 2) - (upArrow.getIconWidth() / 2);
      int y = (height / 2) - (upArrow.getIconHeight() / 2) - 1;
      upArrow.paintIcon(this, g2D, x, y);
    }
    else if (getDirection() == SOUTH) {
      Icon downArrow = inverse ? BaseIcons.getDownArrowInverseIcon() : BaseIcons.getDownArrowIcon();
      int x = (width / 2) - (downArrow.getIconWidth() / 2);
      int y = (height / 2) - (downArrow.getIconHeight() / 2);
      downArrow.paintIcon(this, g2D, x, y);
    }
    else if (getDirection() == WEST) {
      Icon leftArrow = inverse ? BaseIcons.getLeftArrowInverseIcon() : BaseIcons.getLeftArrowIcon();
      int x = (width / 2) - (leftArrow.getIconWidth() / 2) - 1;
      int y = (height / 2) - (leftArrow.getIconHeight() / 2);
      leftArrow.paintIcon(this, g2D, x, y);
    }
    else {
      Icon rightArrow = inverse ? BaseIcons.getRightArrowInverseIcon() : BaseIcons.getRightArrowIcon();
      int x = (width / 2) - (rightArrow.getIconWidth() / 2);
      int y = (height / 2) - (rightArrow.getIconHeight() / 2);
      rightArrow.paintIcon(this, g2D, x, y);
    }
    JTattooUtilities.draw3DBorder(g2D, frameColorLo, ColorHelper.darker(frameColorLo, 10), 0, 0, width, height);
    g2D.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.6f));
    g2D.setColor(frameColorHi);
    g2D.drawLine(1, 1, width - 2, 1);
    g2D.drawLine(1, 1, 1, height - 2);

    g2D.setComposite(savedComposite);
  }

  public Dimension getPreferredSize() {
    if (getDirection() == NORTH) {
      return new Dimension(buttonWidth, buttonWidth + 1);
    }
    else if (getDirection() == SOUTH) {
      return new Dimension(buttonWidth, buttonWidth + 1);
    }
    else if (getDirection() == EAST) {
      return new Dimension(buttonWidth + 1, buttonWidth);
    }
    else if (getDirection() == WEST) {
      return new Dimension(buttonWidth + 1, buttonWidth);
    }
    else {
      return new Dimension(0, 0);
    }
  }

  public Dimension getMinimumSize() {
    return getPreferredSize();
  }

  public Dimension getMaximumSize() {
    return new Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE);
  }

  public int getButtonWidth() {
    return buttonWidth;
  }
}