/*
 * [AntiAliasedJTextArea.java]
 *
 * Summary: Like JTextArea, but allows you to control whether fonts are anti-aliased.
 *
 * Copyright: (c) 2005-2017 Roedy Green, Canadian Mind Products, http://mindprod.com
 *
 * Licence: This software may be copied and used freely for any purpose but military.
 *          http://mindprod.com/contact/nonmil.html
 *
 * Requires: JDK 1.8+
 *
 * Created with: JetBrains IntelliJ IDEA IDE http://www.jetbrains.com/idea/
 *
 * Version History:
 *  2.8 2009-01-23 add Kanji digits to font samples
 */
package com.mindprod.fontshower;

import javax.swing.JTextArea;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;

import static java.lang.System.*;

/**
 * Like JTextArea, but allows you to control whether fonts are anti-aliased.
 *
 * @author Roedy Green, Canadian Mind Products
 * @version 2.8 2009-01-23 add Kanji digits to font samples
 * @since 2005
 */
public final class AntiAliasedJTextArea extends JTextArea
    {
    /**
     * true if want extra debugging output
     */
    private static final boolean DEBUGGING = false;

    /**
     * true if want anti-aliased fonts
     */
    private boolean antialias = true;

    /**
     * no arg constructor
     */
    @SuppressWarnings( { "UnusedDeclaration" } )
    public AntiAliasedJTextArea()
        {
        super();
        }

    /**
     * constructor
     *
     * @param text what to display
     */
    public AntiAliasedJTextArea( String text )
        {
        super( text );
        }

    /**
     * called whenever system has a slice to render
     *
     * @param g Graphics defining where and region to paint.
     */
    protected void paintComponent( Graphics g )
        {
        Graphics2D g2d = ( Graphics2D ) g;
        if ( antialias )
            {
            g2d.setRenderingHint( RenderingHints.KEY_TEXT_ANTIALIASING,
                    RenderingHints.VALUE_TEXT_ANTIALIAS_ON );
            g2d.setRenderingHint( RenderingHints.KEY_RENDERING,
                    RenderingHints.VALUE_RENDER_QUALITY );
            // if wanted to smooth geometric shapes too
            // g2d.setRenderingHint( RenderingHints.KEY_ANTIALIASING,
            // RenderingHints.VALUE_ANTIALIAS_ON );
            }
        if ( DEBUGGING )
            {
            out.println(
                    "AntiAliasedJTextArea.paintComponent called with antialias:"
                    + antialias
                    + " "
                    + g2d.getClipBounds()
            );
            }
        super.paintComponent( g2d );
        }

    /**
     * Control whether fonts are antialiased. Takes extra time, but makes smoother edges.
     *
     * @param antialias true if want anti-aliasing.
     */
    public void setAntiAlias( boolean antialias )
        {
        this.antialias = antialias;
        this.repaint();
        }
    }