/*
 * @(#)LineBorder.java	1.21 01/12/03
 *
 * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
package javax.swing.border;

import java.awt.Graphics;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.Color;
import java.awt.Component;

/**
 * A class which implements a line border of arbitrary thickness
 * and of a single color.
 * <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<sup><font size="-2">TM</font></sup>
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @version 1.21 12/03/01
 * @author David Kloba
 */
public class LineBorder extends AbstractBorder
{
    private static Border blackLine;
    private static Border grayLine;

    protected int thickness;
    protected Color lineColor;
    protected boolean roundedCorners;

    /** Convenience method for getting the Color.black LineBorder of thickness 1.
      */
    public static Border createBlackLineBorder() {
        if (blackLine == null) {
            blackLine = new LineBorder(Color.black, 1);
        }
        return blackLine;
    }

    /** Convenience method for getting the Color.gray LineBorder of thickness 1.
      */
    public static Border createGrayLineBorder() {
        if (grayLine == null) {
            grayLine = new LineBorder(Color.gray, 1);
        }
        return grayLine;
    }

    /** 
     * Creates a line border with the specified color and a 
     * thickness = 1.
     * @param color the color for the border
     */
    public LineBorder(Color color) {
        this(color, 1, false);
    }

    /**
     * Creates a line border with the specified color and thickness.
     * @param color the color of the border
     * @param thickness the thickness of the border
     */
    public LineBorder(Color color, int thickness)  {
        this(color, thickness, false);
    }

    /**
     * Creates a line border with the specified color, thickness,
     * and corner shape.
     * @param color the color of the border
     * @param thickness the thickness of the border
     * @param roundedCorners whether or not border corners should be round
     * @since 1.3
     */
    public LineBorder(Color color, int thickness, boolean roundedCorners)  {
        lineColor = color;
        this.thickness = thickness;
	this.roundedCorners = roundedCorners;
    }

    /**
     * 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) {
        Color oldColor = g.getColor();
        int i;

	/// PENDING(klobad) How/should do we support Roundtangles?
        g.setColor(lineColor);
        for(i = 0; i < thickness; i++)  {
	    if(!roundedCorners)
                g.drawRect(x+i, y+i, width-i-i-1, height-i-i-1);
	    else
                g.drawRoundRect(x+i, y+i, width-i-i-1, height-i-i-1, thickness, thickness);
        }
        g.setColor(oldColor);
    }

    /**
     * Returns the insets of the border.
     * @param c the component for which this border insets value applies
     */
    public Insets getBorderInsets(Component c)       {
        return new Insets(thickness, thickness, thickness, thickness);
    }

    /** 
     * 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.left = insets.top = insets.right = insets.bottom = thickness;
        return insets;
    }

    /**
     * Returns the color of the border.
     */
    public Color getLineColor()     {
        return lineColor;
    }

    /**
     * Returns the thickness of the border.
     */
    public int getThickness()       {
        return thickness;
    }

    /**
     * Returns whether this border will be drawn with rounded corners.
     */
    public boolean getRoundedCorners() {
        return roundedCorners;
    }

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

}
