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A LookAndFeel library for swing
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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.*;
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;
    }

    @Override
    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));
        switch (getDirection()) {
            case 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);
                    break;
                }
            case 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);
                    break;
                }
            case 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);
                    break;
                }
            default:
                {
                    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);
                    break;
                }
        }
        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);
    }

    @Override
    public Dimension getPreferredSize() {
        switch (getDirection()) {
            case NORTH:
                return new Dimension(buttonWidth, buttonWidth + 1);
            case SOUTH:
                return new Dimension(buttonWidth, buttonWidth + 1);
            case EAST:
                return new Dimension(buttonWidth + 1, buttonWidth);
            case WEST:
                return new Dimension(buttonWidth + 1, buttonWidth);
            default:
                return new Dimension(0, 0);
        }
    }

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

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

    public int getButtonWidth() {
        return buttonWidth;
    }
    
} // end of class BaseScrollButton