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package javax.swing.border;

import java.awt.Graphics;
import java.awt.Insets;
import java.awt.Color;
import java.awt.Component;
import java.beans.ConstructorProperties;

A class which implements a simple two-line bevel border.

Warning:
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 java.beans package. Please see XMLEncoder. 
Author:
David Kloba/**
 * A class which implements a simple two-line bevel border.
 * <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&trade;
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author David Kloba
 */
public class BevelBorder extends AbstractBorder
{
    
Raised bevel type. /** Raised bevel type. */
    public static final int RAISED  = 0;
    
Lowered bevel type. /** Lowered bevel type. */
    public static final int LOWERED = 1;

    protected int bevelType;
    protected Color highlightOuter;
    protected Color highlightInner;
    protected Color shadowInner;
    protected Color shadowOuter;

    
Creates a bevel border with the specified type and whose
colors will be derived from the background color of the
component passed into the paintBorder method.
Params:
bevelType – the type of bevel for the border/**
     * Creates a bevel border with the specified type and whose
     * colors will be derived from the background color of the
     * component passed into the paintBorder method.
     * @param bevelType the type of bevel for the border
     */
    public BevelBorder(int bevelType) {
        this.bevelType = bevelType;
    }

    
Creates a bevel border with the specified type, highlight and
shadow colors.
Params:
bevelType – the type of bevel for the border
highlight – the color to use for the bevel highlight
shadow – the color to use for the bevel shadow/**
     * Creates a bevel border with the specified type, highlight and
     * shadow colors.
     * @param bevelType the type of bevel for the border
     * @param highlight the color to use for the bevel highlight
     * @param shadow the color to use for the bevel shadow
     */
    public BevelBorder(int bevelType, Color highlight, Color shadow) {
        this(bevelType, highlight.brighter(), highlight, shadow, shadow.brighter());
    }

    
Creates a bevel border with the specified type, highlight and
shadow colors.
Params:
bevelType – the type of bevel for the border
highlightOuterColor – the color to use for the bevel outer highlight
highlightInnerColor – the color to use for the bevel inner highlight
shadowOuterColor – the color to use for the bevel outer shadow
shadowInnerColor – the color to use for the bevel inner shadow/**
     * Creates a bevel border with the specified type, highlight and
     * shadow colors.
     *
     * @param bevelType the type of bevel for the border
     * @param highlightOuterColor the color to use for the bevel outer highlight
     * @param highlightInnerColor the color to use for the bevel inner highlight
     * @param shadowOuterColor the color to use for the bevel outer shadow
     * @param shadowInnerColor the color to use for the bevel inner shadow
     */
    @ConstructorProperties({"bevelType", "highlightOuterColor", "highlightInnerColor", "shadowOuterColor", "shadowInnerColor"})
    public BevelBorder(int bevelType, Color highlightOuterColor,
                       Color highlightInnerColor, Color shadowOuterColor,
                       Color shadowInnerColor) {
        this(bevelType);
        this.highlightOuter = highlightOuterColor;
        this.highlightInner = highlightInnerColor;
        this.shadowOuter = shadowOuterColor;
        this.shadowInner = shadowInnerColor;
    }

    
Paints the border for the specified component with the specified
position and size.
Params:
c – the component for which this border is being painted
g – the paint graphics
x – the x position of the painted border
y – the y position of the painted border
width – the width of the painted border
height – the height of the painted border/**
     * Paints the border for the specified component with the specified
     * position and size.
     * @param c the component for which this border is being painted
     * @param g the paint graphics
     * @param x the x position of the painted border
     * @param y the y position of the painted border
     * @param width the width of the painted border
     * @param height the height of the painted border
     */
    public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
        if (bevelType == RAISED) {
             paintRaisedBevel(c, g, x, y, width, height);

        } else if (bevelType == LOWERED) {
             paintLoweredBevel(c, g, x, y, width, height);
        }
    }

    
Reinitialize the insets parameter with this Border's current Insets.
Params:
c – the component for which this border insets value applies
insets – the object to be reinitialized/**
     * Reinitialize the insets parameter with this Border's current Insets.
     * @param c the component for which this border insets value applies
     * @param insets the object to be reinitialized
     */
    public Insets getBorderInsets(Component c, Insets insets) {
        insets.set(2, 2, 2, 2);
        return insets;
    }

    
Returns the outer highlight color of the bevel border
when rendered on the specified component.  If no highlight
color was specified at instantiation, the highlight color
is derived from the specified component's background color.
Params:
c – the component for which the highlight may be derived
Since:
1.3/**
     * Returns the outer highlight color of the bevel border
     * when rendered on the specified component.  If no highlight
     * color was specified at instantiation, the highlight color
     * is derived from the specified component's background color.
     * @param c the component for which the highlight may be derived
     * @since 1.3
     */
    public Color getHighlightOuterColor(Component c)   {
        Color highlight = getHighlightOuterColor();
        return highlight != null? highlight :
                                       c.getBackground().brighter().brighter();
    }

    
Returns the inner highlight color of the bevel border
when rendered on the specified component.  If no highlight
color was specified at instantiation, the highlight color
is derived from the specified component's background color.
Params:
c – the component for which the highlight may be derived
Since:
1.3/**
     * Returns the inner highlight color of the bevel border
     * when rendered on the specified component.  If no highlight
     * color was specified at instantiation, the highlight color
     * is derived from the specified component's background color.
     * @param c the component for which the highlight may be derived
     * @since 1.3
     */
    public Color getHighlightInnerColor(Component c)   {
        Color highlight = getHighlightInnerColor();
        return highlight != null? highlight :
                                       c.getBackground().brighter();
    }

    
Returns the inner shadow color of the bevel border
when rendered on the specified component.  If no shadow
color was specified at instantiation, the shadow color
is derived from the specified component's background color.
Params:
c – the component for which the shadow may be derived
Since:
1.3/**
     * Returns the inner shadow color of the bevel border
     * when rendered on the specified component.  If no shadow
     * color was specified at instantiation, the shadow color
     * is derived from the specified component's background color.
     * @param c the component for which the shadow may be derived
     * @since 1.3
     */
    public Color getShadowInnerColor(Component c)      {
        Color shadow = getShadowInnerColor();
        return shadow != null? shadow :
                                    c.getBackground().darker();
    }

    
Returns the outer shadow color of the bevel border
when rendered on the specified component.  If no shadow
color was specified at instantiation, the shadow color
is derived from the specified component's background color.
Params:
c – the component for which the shadow may be derived
Since:
1.3/**
     * Returns the outer shadow color of the bevel border
     * when rendered on the specified component.  If no shadow
     * color was specified at instantiation, the shadow color
     * is derived from the specified component's background color.
     * @param c the component for which the shadow may be derived
     * @since 1.3
     */
    public Color getShadowOuterColor(Component c)      {
        Color shadow = getShadowOuterColor();
        return shadow != null? shadow :
                                    c.getBackground().darker().darker();
    }

    
Returns the outer highlight color of the bevel border.
Will return null if no highlight color was specified
at instantiation.
Since:
1.3/**
     * Returns the outer highlight color of the bevel border.
     * Will return null if no highlight color was specified
     * at instantiation.
     * @since 1.3
     */
    public Color getHighlightOuterColor()   {
        return highlightOuter;
    }

    
Returns the inner highlight color of the bevel border.
Will return null if no highlight color was specified
at instantiation.
Since:
1.3/**
     * Returns the inner highlight color of the bevel border.
     * Will return null if no highlight color was specified
     * at instantiation.
     * @since 1.3
     */
    public Color getHighlightInnerColor()   {
        return highlightInner;
    }

    
Returns the inner shadow color of the bevel border.
Will return null if no shadow color was specified
at instantiation.
Since:
1.3/**
     * Returns the inner shadow color of the bevel border.
     * Will return null if no shadow color was specified
     * at instantiation.
     * @since 1.3
     */
    public Color getShadowInnerColor()      {
        return shadowInner;
    }

    
Returns the outer shadow color of the bevel border.
Will return null if no shadow color was specified
at instantiation.
Since:
1.3/**
     * Returns the outer shadow color of the bevel border.
     * Will return null if no shadow color was specified
     * at instantiation.
     * @since 1.3
     */
    public Color getShadowOuterColor()      {
        return shadowOuter;
    }

    
Returns the type of the bevel border.
/**
     * Returns the type of the bevel border.
     */
    public int getBevelType()       {
        return bevelType;
    }

    
Returns whether or not the border is opaque.
/**
     * Returns whether or not the border is opaque.
     */
    public boolean isBorderOpaque() { return true; }

    protected void paintRaisedBevel(Component c, Graphics g, int x, int y,
                                    int width, int height)  {
        Color oldColor = g.getColor();
        int h = height;
        int w = width;

        g.translate(x, y);

        g.setColor(getHighlightOuterColor(c));
        g.drawLine(0, 0, 0, h-2);
        g.drawLine(1, 0, w-2, 0);

        g.setColor(getHighlightInnerColor(c));
        g.drawLine(1, 1, 1, h-3);
        g.drawLine(2, 1, w-3, 1);

        g.setColor(getShadowOuterColor(c));
        g.drawLine(0, h-1, w-1, h-1);
        g.drawLine(w-1, 0, w-1, h-2);

        g.setColor(getShadowInnerColor(c));
        g.drawLine(1, h-2, w-2, h-2);
        g.drawLine(w-2, 1, w-2, h-3);

        g.translate(-x, -y);
        g.setColor(oldColor);

    }

    protected void paintLoweredBevel(Component c, Graphics g, int x, int y,
                                        int width, int height)  {
        Color oldColor = g.getColor();
        int h = height;
        int w = width;

        g.translate(x, y);

        g.setColor(getShadowInnerColor(c));
        g.drawLine(0, 0, 0, h-1);
        g.drawLine(1, 0, w-1, 0);

        g.setColor(getShadowOuterColor(c));
        g.drawLine(1, 1, 1, h-2);
        g.drawLine(2, 1, w-2, 1);

        g.setColor(getHighlightOuterColor(c));
        g.drawLine(1, h-1, w-1, h-1);
        g.drawLine(w-1, 1, w-1, h-2);

        g.setColor(getHighlightInnerColor(c));
        g.drawLine(2, h-2, w-2, h-2);
        g.drawLine(w-2, 2, w-2, h-3);

        g.translate(-x, -y);
        g.setColor(oldColor);

    }

}