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1: /* =========================================================== 2: * JFreeChart : a free chart library for the Java(tm) platform 3: * =========================================================== 4: * 5: * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors. 6: * 7: * Project Info: http://www.jfree.org/jfreechart/index.html 8: * 9: * This library is free software; you can redistribute it and/or modify it 10: * under the terms of the GNU Lesser General Public License as published by 11: * the Free Software Foundation; either version 2.1 of the License, or 12: * (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but 15: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 17: * License for more details. 18: * 19: * You should have received a copy of the GNU Lesser General Public 20: * License along with this library; if not, write to the Free Software 21: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 22: * USA. 23: * 24: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 25: * in the United States and other countries.] 26: * 27: * ------------------- 28: * TickUnitSource.java 29: * ------------------- 30: * (C) Copyright 2003-2007, by Object Refinery Limited. 31: * 32: * Original Author: David Gilbert (for Object Refinery Limited); 33: * Contributor(s): -; 34: * 35: * Changes 36: * ------- 37: * 23-Sep-2003 : Version 1 (DG); 38: * 39: */ 40: 41: package org.jfree.chart.axis; 42: 43: /** 44: * An interface used by the {@link DateAxis} and {@link NumberAxis} classes to 45: * obtain a suitable {@link TickUnit}. 46: */ 47: public interface TickUnitSource { 48: 49: /** 50: * Returns a tick unit that is larger than the supplied unit. 51: * 52: * @param unit the unit. 53: * 54: * @return A tick unit that is larger than the supplied unit. 55: */ 56: public TickUnit getLargerTickUnit(TickUnit unit); 57: 58: /** 59: * Returns the tick unit in the collection that is greater than or equal 60: * to (in size) the specified unit. 61: * 62: * @param unit the unit. 63: * 64: * @return A unit from the collection. 65: */ 66: public TickUnit getCeilingTickUnit(TickUnit unit); 67: 68: /** 69: * Returns the tick unit in the collection that is greater than or equal 70: * to the specified size. 71: * 72: * @param size the size. 73: * 74: * @return A unit from the collection. 75: */ 76: public TickUnit getCeilingTickUnit(double size); 77: 78: }