001/* =========================================================== 002 * Orson Charts : a 3D chart library for the Java(tm) platform 003 * =========================================================== 004 * 005 * (C)opyright 2013-2022, by David Gilbert. All rights reserved. 006 * 007 * https://github.com/jfree/orson-charts 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 org.jfree.chart3d.plot; 034 035import java.awt.Font; 036 037/** 038 * An object that supplies {@code Font} instances associated with 039 * keys. This is used by the {@link PiePlot3D} class to obtain section label 040 * fonts for each data item(segment) in the chart. A default implementation 041 * ({@link StandardFontSource}) is provided. 042 */ 043public interface FontSource<K> { 044 045 /** 046 * Returns a font based on the supplied key. 047 * 048 * @param key the key ({@code null} not permitted). 049 * 050 * @return A font (never {@code null}). 051 */ 052 Font getFont(K key); 053 054 /** 055 * Sets the font associated with a key. 056 * 057 * @param key the key ({@code null} not permitted). 058 * @param font the font ({@code null} not permitted). 059 */ 060 void setFont(K key, Font font); 061 062 /** 063 * Restyles the source using the specified font. Refer to the implementing 064 * class to confirm the precise behaviour (typically all existing font 065 * settings are cleared and this font is installed as the new default 066 * section label font). 067 * 068 * @param font the font ({@code null} not permitted). 069 * 070 * @since 1.2 071 */ 072 void style(Font font); 073 074}