    001/* ===========================================================
    002 * Orson Charts : a 3D chart library for the Java(tm) platform
    003 * ===========================================================
    004 *
    005 * (C)opyright 2013-2016, by Object Refinery Limited.  All rights reserved.
    006 *
    007 * http://www.object-refinery.com/orsoncharts/index.html
    008 *
    009 * This program is free software: you can redistribute it and/or modify
    010 * it under the terms of the GNU General Public License as published by
    011 * the Free Software Foundation, either version 3 of the License, or
    012 * (at your option) any later version.
    013 *
    014 * This program is distributed in the hope that it will be useful,
    015 * but WITHOUT ANY WARRANTY; without even the implied warranty of
    016 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    017 * GNU General Public License for more details.
    018 *
    019 * You should have received a copy of the GNU General Public License
    020 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    021 *
    022 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
    023 * Other names may be trademarks of their respective owners.]
    024 *
    025 * If you do not wish to be bound by the terms of the GPL, an alternative
    026 * commercial license can be purchased.  For details, please see visit the
    027 * Orson Charts home page:
    028 *
    029 * http://www.object-refinery.com/orsoncharts/index.html
    030 *
    031 */
    032
    033package com.orsoncharts.plot;
    034
    035import java.awt.Font;
    036import java.io.Serializable;
    037
    038import com.orsoncharts.data.DefaultKeyedValues;
    039import com.orsoncharts.util.ArgChecks;
    040
    041/**
    042 * A standard implementation of the {@link FontSource} interface.
    043 * <br><br>
    044 * NOTE: This class is serializable, but the serialization format is subject
    045 * to change in future releases and should not be relied upon for persisting
    046 * instances of this class.
    047 */
    048@SuppressWarnings("serial")
    049public final class StandardFontSource<K extends Comparable<K>>
    050        implements FontSource<K>, Serializable {
    051
    052    private static Font DEFAULT_FONT = new Font("Dialog", Font.PLAIN, 12);
    053
    054    /** Storage for the fonts assigned to keys. */
    055    private DefaultKeyedValues<K, Font> fonts;
    056
    057    /** The default font (never {@code null}). */
    058    private Font defaultFont;
    059
    060    /**
    061     * Creates a new instance with default fonts.
    062     */
    063    public StandardFontSource() {
    064        this(DEFAULT_FONT);
    065    }
    066
    067    /**
    068     * Creates a new font source with the specified default font.
    069     *
    070     * @param defaultFont  the default font ({@code null} not permitted).
    071     */
    072    public StandardFontSource(Font defaultFont) {
    073        ArgChecks.nullNotPermitted(defaultFont, "defaultFont");
    074        this.defaultFont = defaultFont;
    075        this.fonts = new DefaultKeyedValues<K, Font>();
    076    }
    077
    078    /**
    079     * Returns the default font.  The default value is {@link #DEFAULT_FONT}.
    080     *
    081     * @return The default font (never {@code null}).
    082     */
    083    public Font getDefaultFont() {
    084        return this.defaultFont;
    085    }
    086
    087    /**
    088     * Sets the default font.
    089     *
    090     * @param font  the font ({@code null} not permitted).
    091     */
    092    public void setDefaultFont(Font font) {
    093        ArgChecks.nullNotPermitted(font, "font");
    094        this.defaultFont = font;
    095    }
    096
    097    /**
    098     * Returns the font for the specified key.
    099     *
    100     * @param key  the key ({@code null} not permitted).
    101     *
    102     * @return The font (never {@code null}).
    103     */
    104    @Override
    105    public Font getFont(K key) {
    106        Font result = this.fonts.getValue(key);
    107        if (result != null) {
    108            return result;
    109        } else {
    110            return this.defaultFont;
    111        }
    112    }
    113
    114    /**
    115     * Sets the font associated with the specified key.
    116     *
    117     * @param key  the key ({@code null} not permitted).
    118     * @param font  the font ({@code null} permitted).
    119     */
    120    @Override
    121    public void setFont(K key, Font font) {
    122        if (font != null) {
    123            this.fonts.put(key, font);
    124        } else {
    125            this.fonts.remove(key);
    126        }
    127    }
    128
    129    /**
    130     * Clears existing font settings and sets the default font to the
    131     * supplied value.  This method is used by the framework and is not
    132     * normally called by client code.
    133     *
    134     * @param font  the font ({@code null} not permitted).
    135     *
    136     * @since 1.2
    137     */
    138    @Override
    139    public void style(Font font) {
    140        ArgChecks.nullNotPermitted(font, "font");
    141        this.defaultFont = font;
    142        this.fonts.clear();
    143    }
    144
    145    /**
    146     * Tests this paint source for equality with an arbitrary object.
    147     *
    148     * @param obj  the object ({@code null} permitted).
    149     *
    150     * @return A boolean.
    151     */
    152    @Override
    153    public boolean equals(Object obj) {
    154        if (obj == this) {
    155            return true;
    156        }
    157        if (!(obj instanceof StandardFontSource)) {
    158            return false;
    159        }
    160        StandardFontSource that = (StandardFontSource) obj;
    161        if (!this.defaultFont.equals(that.defaultFont)) {
    162            return false;
    163        }
    164        if (!this.fonts.equals(that.fonts)) {
    165            return false;
    166        }
    167        return true;
    168    }
    169
    170}