/*

 * Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package javax.swing.plaf.metal;

import java.awt.Dimension;

import java.awt.Graphics;

import java.awt.Color;

import java.awt.Polygon;

import javax.swing.*;

import javax.swing.plaf.basic.BasicArrowButton;

/**

 * JButton object for Metal scrollbar arrows.

 * <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.  As of 1.4, support for long term storage

 * of all JavaBeans™

 * has been added to the <code>java.beans</code> package.

 * Please see {@link java.beans.XMLEncoder}.

 *

 * @author Tom Santos

 * @author Steve Wilson

 */

@SuppressWarnings("serial") // Same-version serialization only

public class MetalScrollButton extends BasicArrowButton

{

  private static Color shadowColor;

  private static Color highlightColor;

  private boolean isFreeStanding = false;

  private int buttonWidth;

        public MetalScrollButton( int direction, int width, boolean freeStanding )

        {

            super( direction );

            shadowColor = UIManager.getColor("ScrollBar.darkShadow");

            highlightColor = UIManager.getColor("ScrollBar.highlight");

            buttonWidth = width;

            isFreeStanding = freeStanding;

        }

        public void setFreeStanding( boolean freeStanding )

        {

            isFreeStanding = freeStanding;

        }

        public void paint( Graphics g )

        {

            boolean leftToRight = MetalUtils.isLeftToRight(this);

            boolean isEnabled = getParent().isEnabled();

            Color arrowColor = isEnabled ? MetalLookAndFeel.getControlInfo() : MetalLookAndFeel.getControlDisabled();

            boolean isPressed = getModel().isPressed();

            int width = getWidth();

            int height = getHeight();

            int w = width;

            int h = height;

            int arrowHeight = (height+1) / 4;

            int arrowWidth = (height+1) / 2;

            if ( isPressed )

            {

                g.setColor( MetalLookAndFeel.getControlShadow() );

            }

            else

            {

                g.setColor( getBackground() );

            }

            g.fillRect( 0, 0, width, height );

            if ( getDirection() == NORTH )

            {

                if ( !isFreeStanding ) {

                    height +=1;

                    g.translate( 0, -1 );

                    width += 2;

                    if ( !leftToRight ) {

                        g.translate( -1, 0 );

                    }

                }

                // Draw the arrow

                g.setColor( arrowColor );

                int startY = ((h+1) - arrowHeight) / 2;

                int startX = (w / 2);

                for (int line = 0; line < arrowHeight; line++) {

                    g.drawLine( startX-line, startY+line, startX +line+1, startY+line);

                }

                if (isEnabled) {

                    g.setColor( highlightColor );

                    if ( !isPressed )

                    {

                        g.drawLine( 1, 1, width - 3, 1 );

                        g.drawLine( 1, 1, 1, height - 1 );

                    }

                    g.drawLine( width - 1, 1, width - 1, height - 1 );

                    g.setColor( shadowColor );

                    g.drawLine( 0, 0, width - 2, 0 );

                    g.drawLine( 0, 0, 0, height - 1 );

                    g.drawLine( width - 2, 2, width - 2, height - 1 );

                } else {

                    MetalUtils.drawDisabledBorder(g, 0, 0, width, height+1);

                }

                if ( !isFreeStanding ) {

                    height -= 1;

                    g.translate( 0, 1 );

                    width -= 2;

                    if ( !leftToRight ) {

                        g.translate( 1, 0 );

                    }

                }

            }

            else if ( getDirection() == SOUTH )

            {

                if ( !isFreeStanding ) {

                    height += 1;

                    width += 2;

                    if ( !leftToRight ) {

                        g.translate( -1, 0 );

                    }

                }

                // Draw the arrow

                g.setColor( arrowColor );

                int startY = (((h+1) - arrowHeight) / 2)+ arrowHeight-1;

                int startX = (w / 2);

                for (int line = 0; line < arrowHeight; line++) {

                    g.drawLine( startX-line, startY-line, startX +line+1, startY-line);

                }

                if (isEnabled) {

                    g.setColor( highlightColor );

                    if ( !isPressed )

                    {

                        g.drawLine( 1, 0, width - 3, 0 );

                        g.drawLine( 1, 0, 1, height - 3 );

                    }

                    g.drawLine( 1, height - 1, width - 1, height - 1 );

                    g.drawLine( width - 1, 0, width - 1, height - 1 );

                    g.setColor( shadowColor );

                    g.drawLine( 0, 0, 0, height - 2 );

                    g.drawLine( width - 2, 0, width - 2, height - 2 );

                    g.drawLine( 2, height - 2, width - 2, height - 2 );

                } else {

                    MetalUtils.drawDisabledBorder(g, 0,-1, width, height+1);

                }

                if ( !isFreeStanding ) {

                    height -= 1;

                    width -= 2;

                    if ( !leftToRight ) {

                        g.translate( 1, 0 );

                    }

                }

            }

            else if ( getDirection() == EAST )

            {

                if ( !isFreeStanding ) {

                    height += 2;

                    width += 1;

                }

                // Draw the arrow

                g.setColor( arrowColor );

                int startX = (((w+1) - arrowHeight) / 2) + arrowHeight-1;

                int startY = (h / 2);

                for (int line = 0; line < arrowHeight; line++) {

                    g.drawLine( startX-line, startY-line, startX -line, startY+line+1);

                }

                if (isEnabled) {

                    g.setColor( highlightColor );

                    if ( !isPressed )

                    {

                        g.drawLine( 0, 1, width - 3, 1 );

                        g.drawLine( 0, 1, 0, height - 3 );

                    }

                    g.drawLine( width - 1, 1, width - 1, height - 1 );

                    g.drawLine( 0, height - 1, width - 1, height - 1 );

                    g.setColor( shadowColor );

                    g.drawLine( 0, 0,width - 2, 0 );

                    g.drawLine( width - 2, 2, width - 2, height - 2 );

                    g.drawLine( 0, height - 2, width - 2, height - 2 );

                } else {

                    MetalUtils.drawDisabledBorder(g,-1,0, width+1, height);

                }

                if ( !isFreeStanding ) {

                    height -= 2;

                    width -= 1;

                }

            }

            else if ( getDirection() == WEST )

            {

                if ( !isFreeStanding ) {

                    height += 2;

                    width += 1;

                    g.translate( -1, 0 );

                }

                // Draw the arrow

                g.setColor( arrowColor );

                int startX = (((w+1) - arrowHeight) / 2);

                int startY = (h / 2);

                for (int line = 0; line < arrowHeight; line++) {

                    g.drawLine( startX+line, startY-line, startX +line, startY+line+1);

                }

                if (isEnabled) {

                    g.setColor( highlightColor );

                    if ( !isPressed )

                    {

                        g.drawLine( 1, 1, width - 1, 1 );

                        g.drawLine( 1, 1, 1, height - 3 );

                    }

                    g.drawLine( 1, height - 1, width - 1, height - 1 );

                    g.setColor( shadowColor );

                    g.drawLine( 0, 0, width - 1, 0 );

                    g.drawLine( 0, 0, 0, height - 2 );

                    g.drawLine( 2, height - 2, width - 1, height - 2 );

                } else {

                    MetalUtils.drawDisabledBorder(g,0,0, width+1, height);

                }

                if ( !isFreeStanding ) {

                    height -= 2;

                    width -= 1;

                    g.translate( 1, 0 );

                }

            }

        }

        public Dimension getPreferredSize()

        {

            if ( getDirection() == NORTH )

            {

                return new Dimension( buttonWidth, buttonWidth - 2 );

            }

            else if ( getDirection() == SOUTH )

            {

                return new Dimension( buttonWidth, buttonWidth - (isFreeStanding ? 1 : 2) );

            }

            else if ( getDirection() == EAST )

            {

                return new Dimension( buttonWidth - (isFreeStanding ? 1 : 2), buttonWidth );

            }

            else if ( getDirection() == WEST )

            {

                return new Dimension( buttonWidth - 2, 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;

        }

}