01: /* ===========================================================
02: * JFreeChart : a free chart library for the Java(tm) platform
03: * ===========================================================
04: *
05: * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors.
06: *
07: * Project Info: http://www.jfree.org/jfreechart/index.html
08: *
09: * 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: * PaintScale.java
29: * ---------------
30: * (C) Copyright 2006, 2007, by Object Refinery Limited.
31: *
32: * Original Author: David Gilbert (for Object Refinery Limited);
33: * Contributor(s): -;
34: *
35: * $Id: PaintScale.java,v 1.1.2.2 2007/01/31 14:31:24 mungady Exp $
36: *
37: * Changes
38: * -------
39: * 05-Jul-2006 : Version 1 (DG);
40: * 31-Jan-2007 : Added getLowerBound() and getUpperBound() methods (DG);
41: *
42: */
43:
44: package org.jfree.chart.renderer;
45:
46: import java.awt.Paint;
47:
48: import org.jfree.chart.renderer.xy.XYBlockRenderer;
49:
50: /**
51: * A source for <code>Paint</code> instances, used by the
52: * {@link XYBlockRenderer}.
53: * <br><br>
54: * NOTE: Classes that implement this interface should also implement
55: * <code>PublicCloneable</code> and <code>Serializable</code>, so
56: * that any renderer (or other object instance) that references an instance of
57: * this interface can still be cloned or serialized.
58: *
59: * @since 1.0.4
60: */
61: public interface PaintScale {
62:
63: /**
64: * Returns the lower bound for the scale.
65: *
66: * @return The lower bound.
67: *
68: * @see #getUpperBound()
69: */
70: public double getLowerBound();
71:
72: /**
73: * Returns the upper bound for the scale.
74: *
75: * @return The upper bound.
76: *
77: * @see #getLowerBound()
78: */
79: public double getUpperBound();
80:
81: /**
82: * Returns a <code>Paint</code> instance for the specified value.
83: *
84: * @param value the value.
85: *
86: * @return A <code>Paint</code> instance (never <code>null</code>).
87: */
88: public Paint getPaint(double value);
89:
90: }
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