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<HTML><BODY BGCOLOR="white"><PRE><FONT color="green">001</FONT> /* ===========================================================<a name="line.1"></a><FONT color="green">002</FONT> * JFreeChart : a free chart library for the Java(tm) platform<a name="line.2"></a><FONT color="green">003</FONT> * ===========================================================<a name="line.3"></a><FONT color="green">004</FONT> *<a name="line.4"></a><FONT color="green">005</FONT> * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.<a name="line.5"></a><FONT color="green">006</FONT> *<a name="line.6"></a><FONT color="green">007</FONT> * Project Info: http://www.jfree.org/jfreechart/index.html<a name="line.7"></a><FONT color="green">008</FONT> *<a name="line.8"></a><FONT color="green">009</FONT> * This library is free software; you can redistribute it and/or modify it <a name="line.9"></a><FONT color="green">010</FONT> * under the terms of the GNU Lesser General Public License as published by <a name="line.10"></a><FONT color="green">011</FONT> * the Free Software Foundation; either version 2.1 of the License, or <a name="line.11"></a><FONT color="green">012</FONT> * (at your option) any later version.<a name="line.12"></a><FONT color="green">013</FONT> *<a name="line.13"></a><FONT color="green">014</FONT> * This library is distributed in the hope that it will be useful, but <a name="line.14"></a><FONT color="green">015</FONT> * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY <a name="line.15"></a><FONT color="green">016</FONT> * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public <a name="line.16"></a><FONT color="green">017</FONT> * License for more details.<a name="line.17"></a><FONT color="green">018</FONT> *<a name="line.18"></a><FONT color="green">019</FONT> * You should have received a copy of the GNU Lesser General Public<a name="line.19"></a><FONT color="green">020</FONT> * License along with this library; if not, write to the Free Software<a name="line.20"></a><FONT color="green">021</FONT> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, <a name="line.21"></a><FONT color="green">022</FONT> * USA. <a name="line.22"></a><FONT color="green">023</FONT> *<a name="line.23"></a><FONT color="green">024</FONT> * [Java is a trademark or registered trademark of Sun Microsystems, Inc. <a name="line.24"></a><FONT color="green">025</FONT> * in the United States and other countries.]<a name="line.25"></a><FONT color="green">026</FONT> *<a name="line.26"></a><FONT color="green">027</FONT> * -----------------<a name="line.27"></a><FONT color="green">028</FONT> * ColorPalette.java<a name="line.28"></a><FONT color="green">029</FONT> * -----------------<a name="line.29"></a><FONT color="green">030</FONT> * (C) Copyright 2002-2005, by David M. O'Donnell and Contributors.<a name="line.30"></a><FONT color="green">031</FONT> *<a name="line.31"></a><FONT color="green">032</FONT> * Original Author: David M. O'Donnell;<a name="line.32"></a><FONT color="green">033</FONT> * Contributor(s): David Gilbert (for Object Refinery Limited);<a name="line.33"></a><FONT color="green">034</FONT> *<a name="line.34"></a><FONT color="green">035</FONT> * $Id: ColorPalette.java,v 1.1.2.1 2005/11/24 16:11:49 mungady Exp $<a name="line.35"></a><FONT color="green">036</FONT> *<a name="line.36"></a><FONT color="green">037</FONT> * Changes<a name="line.37"></a><FONT color="green">038</FONT> * -------<a name="line.38"></a><FONT color="green">039</FONT> * 26-Nov-2002 : Version 1 contributed by David M. O'Donnell (DG);<a name="line.39"></a><FONT color="green">040</FONT> * 26-Mar-2003 : Implemented Serializable (DG);<a name="line.40"></a><FONT color="green">041</FONT> * 14-Aug-2003 : Implemented Cloneable (DG);<a name="line.41"></a><FONT color="green">042</FONT> *<a name="line.42"></a><FONT color="green">043</FONT> */<a name="line.43"></a><FONT color="green">044</FONT> <a name="line.44"></a><FONT color="green">045</FONT> package org.jfree.chart.plot;<a name="line.45"></a><FONT color="green">046</FONT> <a name="line.46"></a><FONT color="green">047</FONT> import java.awt.Color;<a name="line.47"></a><FONT color="green">048</FONT> import java.awt.Paint;<a name="line.48"></a><FONT color="green">049</FONT> import java.io.Serializable;<a name="line.49"></a><FONT color="green">050</FONT> import java.util.Arrays;<a name="line.50"></a><FONT color="green">051</FONT> <a name="line.51"></a><FONT color="green">052</FONT> import org.jfree.chart.axis.ValueTick;<a name="line.52"></a><FONT color="green">053</FONT> <a name="line.53"></a><FONT color="green">054</FONT> /**<a name="line.54"></a><FONT color="green">055</FONT> * Defines palette used in Contour Plots.<a name="line.55"></a><FONT color="green">056</FONT> *<a name="line.56"></a><FONT color="green">057</FONT> * @author David M. O'Donnell.<a name="line.57"></a><FONT color="green">058</FONT> */<a name="line.58"></a><FONT color="green">059</FONT> public abstract class ColorPalette implements Cloneable, Serializable {<a name="line.59"></a><FONT color="green">060</FONT> <a name="line.60"></a><FONT color="green">061</FONT> /** For serialization. */<a name="line.61"></a><FONT color="green">062</FONT> private static final long serialVersionUID = -9029901853079622051L;<a name="line.62"></a><FONT color="green">063</FONT> <a name="line.63"></a><FONT color="green">064</FONT> /** The min z-axis value. */<a name="line.64"></a><FONT color="green">065</FONT> protected double minZ = -1;<a name="line.65"></a><FONT color="green">066</FONT> <a name="line.66"></a><FONT color="green">067</FONT> /** The max z-axis value. */<a name="line.67"></a><FONT color="green">068</FONT> protected double maxZ = -1;<a name="line.68"></a><FONT color="green">069</FONT> <a name="line.69"></a><FONT color="green">070</FONT> /** Red components. */<a name="line.70"></a><FONT color="green">071</FONT> protected int[] r;<a name="line.71"></a><FONT color="green">072</FONT> <a name="line.72"></a><FONT color="green">073</FONT> /** Green components. */<a name="line.73"></a><FONT color="green">074</FONT> protected int[] g;<a name="line.74"></a><FONT color="green">075</FONT> <a name="line.75"></a><FONT color="green">076</FONT> /** Blue components. */<a name="line.76"></a><FONT color="green">077</FONT> protected int[] b;<a name="line.77"></a><FONT color="green">078</FONT> <a name="line.78"></a><FONT color="green">079</FONT> /** Tick values are stored for use with stepped palette. */<a name="line.79"></a><FONT color="green">080</FONT> protected double[] tickValues = null;<a name="line.80"></a><FONT color="green">081</FONT> <a name="line.81"></a><FONT color="green">082</FONT> /** Logscale? */<a name="line.82"></a><FONT color="green">083</FONT> protected boolean logscale = false;<a name="line.83"></a><FONT color="green">084</FONT> <a name="line.84"></a><FONT color="green">085</FONT> /** Inverse palette (ie, min and max colors are reversed). */<a name="line.85"></a><FONT color="green">086</FONT> protected boolean inverse = false;<a name="line.86"></a><FONT color="green">087</FONT> <a name="line.87"></a><FONT color="green">088</FONT> /** The palette name. */<a name="line.88"></a><FONT color="green">089</FONT> protected String paletteName = null;<a name="line.89"></a><FONT color="green">090</FONT> <a name="line.90"></a><FONT color="green">091</FONT> /** Controls whether palette colors are stepped (not continuous). */<a name="line.91"></a><FONT color="green">092</FONT> protected boolean stepped = false;<a name="line.92"></a><FONT color="green">093</FONT> <a name="line.93"></a><FONT color="green">094</FONT> /** Constant for converting loge to log10. */<a name="line.94"></a><FONT color="green">095</FONT> protected static final double log10 = Math.log(10);<a name="line.95"></a><FONT color="green">096</FONT> <a name="line.96"></a><FONT color="green">097</FONT> /**<a name="line.97"></a><FONT color="green">098</FONT> * Default contructor.<a name="line.98"></a><FONT color="green">099</FONT> */<a name="line.99"></a><FONT color="green">100</FONT> public ColorPalette() {<a name="line.100"></a><FONT color="green">101</FONT> super();<a name="line.101"></a><FONT color="green">102</FONT> }<a name="line.102"></a><FONT color="green">103</FONT> <a name="line.103"></a><FONT color="green">104</FONT> /**<a name="line.104"></a><FONT color="green">105</FONT> * Returns the color associated with a value.<a name="line.105"></a><FONT color="green">106</FONT> *<a name="line.106"></a><FONT color="green">107</FONT> * @param value the value.<a name="line.107"></a><FONT color="green">108</FONT> *<a name="line.108"></a><FONT color="green">109</FONT> * @return The color.<a name="line.109"></a><FONT color="green">110</FONT> */<a name="line.110"></a><FONT color="green">111</FONT> public Paint getColor(double value) {<a name="line.111"></a><FONT color="green">112</FONT> int izV = (int) (253 * (value - this.minZ) <a name="line.112"></a><FONT color="green">113</FONT> / (this.maxZ - this.minZ)) + 2;<a name="line.113"></a><FONT color="green">114</FONT> return new Color(this.r[izV], this.g[izV], this.b[izV]);<a name="line.114"></a><FONT color="green">115</FONT> }<a name="line.115"></a><FONT color="green">116</FONT> <a name="line.116"></a><FONT color="green">117</FONT> /**<a name="line.117"></a><FONT color="green">118</FONT> * Returns a color.<a name="line.118"></a><FONT color="green">119</FONT> *<a name="line.119"></a><FONT color="green">120</FONT> * @param izV ??.<a name="line.120"></a><FONT color="green">121</FONT> *<a name="line.121"></a><FONT color="green">122</FONT> * @return The color.<a name="line.122"></a><FONT color="green">123</FONT> */<a name="line.123"></a><FONT color="green">124</FONT> public Color getColor(int izV) {<a name="line.124"></a><FONT color="green">125</FONT> return new Color(this.r[izV], this.g[izV], this.b[izV]);<a name="line.125"></a><FONT color="green">126</FONT> }<a name="line.126"></a><FONT color="green">127</FONT> <a name="line.127"></a><FONT color="green">128</FONT> /**<a name="line.128"></a><FONT color="green">129</FONT> * Returns Color by mapping a given value to a linear palette.<a name="line.129"></a><FONT color="green">130</FONT> *<a name="line.130"></a><FONT color="green">131</FONT> * @param value the value.<a name="line.131"></a><FONT color="green">132</FONT> *<a name="line.132"></a><FONT color="green">133</FONT> * @return The color.<a name="line.133"></a><FONT color="green">134</FONT> */<a name="line.134"></a><FONT color="green">135</FONT> public Color getColorLinear(double value) {<a name="line.135"></a><FONT color="green">136</FONT> int izV = 0;<a name="line.136"></a><FONT color="green">137</FONT> if (this.stepped) {<a name="line.137"></a><FONT color="green">138</FONT> int index = Arrays.binarySearch(this.tickValues, value);<a name="line.138"></a><FONT color="green">139</FONT> if (index < 0) {<a name="line.139"></a><FONT color="green">140</FONT> index = -1 * index - 2;<a name="line.140"></a><FONT color="green">141</FONT> }<a name="line.141"></a><FONT color="green">142</FONT> <a name="line.142"></a><FONT color="green">143</FONT> if (index < 0) { // For the case were the first tick is greater <a name="line.143"></a><FONT color="green">144</FONT> // than minZ<a name="line.144"></a><FONT color="green">145</FONT> value = this.minZ;<a name="line.145"></a><FONT color="green">146</FONT> }<a name="line.146"></a><FONT color="green">147</FONT> else {<a name="line.147"></a><FONT color="green">148</FONT> value = this.tickValues[index];<a name="line.148"></a><FONT color="green">149</FONT> }<a name="line.149"></a><FONT color="green">150</FONT> }<a name="line.150"></a><FONT color="green">151</FONT> izV = (int) (253 * (value - this.minZ) / (this.maxZ - this.minZ)) + 2;<a name="line.151"></a><FONT color="green">152</FONT> izV = Math.min(izV, 255);<a name="line.152"></a><FONT color="green">153</FONT> izV = Math.max(izV, 2);<a name="line.153"></a><FONT color="green">154</FONT> return getColor(izV);<a name="line.154"></a><FONT color="green">155</FONT> }<a name="line.155"></a><FONT color="green">156</FONT> <a name="line.156"></a><FONT color="green">157</FONT> /**<a name="line.157"></a><FONT color="green">158</FONT> * Returns Color by mapping a given value to a common log palette.<a name="line.158"></a><FONT color="green">159</FONT> *<a name="line.159"></a><FONT color="green">160</FONT> * @param value the value.<a name="line.160"></a><FONT color="green">161</FONT> *<a name="line.161"></a><FONT color="green">162</FONT> * @return The color.<a name="line.162"></a><FONT color="green">163</FONT> */<a name="line.163"></a><FONT color="green">164</FONT> public Color getColorLog(double value) {<a name="line.164"></a><FONT color="green">165</FONT> int izV = 0;<a name="line.165"></a><FONT color="green">166</FONT> double minZtmp = this.minZ;<a name="line.166"></a><FONT color="green">167</FONT> double maxZtmp = this.maxZ;<a name="line.167"></a><FONT color="green">168</FONT> if (this.minZ <= 0.0) {<a name="line.168"></a><FONT color="green">169</FONT> // negatives = true;<a name="line.169"></a><FONT color="green">170</FONT> this.maxZ = maxZtmp - minZtmp + 1;<a name="line.170"></a><FONT color="green">171</FONT> this.minZ = 1;<a name="line.171"></a><FONT color="green">172</FONT> value = value - minZtmp + 1;<a name="line.172"></a><FONT color="green">173</FONT> }<a name="line.173"></a><FONT color="green">174</FONT> double minZlog = Math.log(this.minZ) / log10;<a name="line.174"></a><FONT color="green">175</FONT> double maxZlog = Math.log(this.maxZ) / log10;<a name="line.175"></a><FONT color="green">176</FONT> value = Math.log(value) / log10;<a name="line.176"></a><FONT color="green">177</FONT> // value = Math.pow(10,value);<a name="line.177"></a>⌨️ 快捷键说明
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