📄 logarithmicaxis.html
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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> * LogarithmicAxis.java<a name="line.28"></a><FONT color="green">029</FONT> * --------------------<a name="line.29"></a><FONT color="green">030</FONT> * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.<a name="line.30"></a><FONT color="green">031</FONT> *<a name="line.31"></a><FONT color="green">032</FONT> * Original Author: Michael Duffy / Eric Thomas;<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> * David M. O'Donnell;<a name="line.34"></a><FONT color="green">035</FONT> * Scott Sams;<a name="line.35"></a><FONT color="green">036</FONT> *<a name="line.36"></a><FONT color="green">037</FONT> * $Id: LogarithmicAxis.java,v 1.11.2.1 2005/10/25 20:37:34 mungady Exp $<a name="line.37"></a><FONT color="green">038</FONT> *<a name="line.38"></a><FONT color="green">039</FONT> * Changes<a name="line.39"></a><FONT color="green">040</FONT> * -------<a name="line.40"></a><FONT color="green">041</FONT> * 14-Mar-2002 : Version 1 contributed by Michael Duffy (DG);<a name="line.41"></a><FONT color="green">042</FONT> * 19-Apr-2002 : drawVerticalString() is now drawRotatedString() in<a name="line.42"></a><FONT color="green">043</FONT> * RefineryUtilities (DG);<a name="line.43"></a><FONT color="green">044</FONT> * 23-Apr-2002 : Added a range property (DG);<a name="line.44"></a><FONT color="green">045</FONT> * 15-May-2002 : Modified to be able to deal with negative and zero values (via<a name="line.45"></a><FONT color="green">046</FONT> * new 'adjustedLog10()' method); occurrences of "Math.log(10)"<a name="line.46"></a><FONT color="green">047</FONT> * changed to "LOG10_VALUE"; changed 'intValue()' to<a name="line.47"></a><FONT color="green">048</FONT> * 'longValue()' in 'refreshTicks()' to fix label-text value<a name="line.48"></a><FONT color="green">049</FONT> * out-of-range problem; removed 'draw()' method; added<a name="line.49"></a><FONT color="green">050</FONT> * 'autoRangeMinimumSize' check; added 'log10TickLabelsFlag'<a name="line.50"></a><FONT color="green">051</FONT> * parameter flag and implementation (ET);<a name="line.51"></a><FONT color="green">052</FONT> * 25-Jun-2002 : Removed redundant import (DG);<a name="line.52"></a><FONT color="green">053</FONT> * 25-Jul-2002 : Changed order of parameters in ValueAxis constructor (DG);<a name="line.53"></a><FONT color="green">054</FONT> * 16-Jul-2002 : Implemented support for plotting positive values arbitrarily<a name="line.54"></a><FONT color="green">055</FONT> * close to zero (added 'allowNegativesFlag' flag) (ET).<a name="line.55"></a><FONT color="green">056</FONT> * 05-Sep-2002 : Updated constructor reflecting changes in the Axis class (DG);<a name="line.56"></a><FONT color="green">057</FONT> * 02-Oct-2002 : Fixed errors reported by Checkstyle (DG);<a name="line.57"></a><FONT color="green">058</FONT> * 08-Nov-2002 : Moved to new package com.jrefinery.chart.axis (DG);<a name="line.58"></a><FONT color="green">059</FONT> * 22-Nov-2002 : Bug fixes from David M. O'Donnell (DG);<a name="line.59"></a><FONT color="green">060</FONT> * 14-Jan-2003 : Changed autoRangeMinimumSize from Number --> double (DG);<a name="line.60"></a><FONT color="green">061</FONT> * 20-Jan-2003 : Removed unnecessary constructors (DG);<a name="line.61"></a><FONT color="green">062</FONT> * 26-Mar-2003 : Implemented Serializable (DG);<a name="line.62"></a><FONT color="green">063</FONT> * 08-May-2003 : Fixed plotting of datasets with lower==upper bounds when<a name="line.63"></a><FONT color="green">064</FONT> * 'minAutoRange' is very small; added 'strictValuesFlag'<a name="line.64"></a><FONT color="green">065</FONT> * and default functionality of throwing a runtime exception<a name="line.65"></a><FONT color="green">066</FONT> * if 'allowNegativesFlag' is false and any values are less<a name="line.66"></a><FONT color="green">067</FONT> * than or equal to zero; added 'expTickLabelsFlag' and<a name="line.67"></a><FONT color="green">068</FONT> * changed to use "1e#"-style tick labels by default<a name="line.68"></a><FONT color="green">069</FONT> * ("10^n"-style tick labels still supported via 'set'<a name="line.69"></a><FONT color="green">070</FONT> * method); improved generation of tick labels when range of<a name="line.70"></a><FONT color="green">071</FONT> * values is small; changed to use 'NumberFormat.getInstance()'<a name="line.71"></a><FONT color="green">072</FONT> * to create 'numberFormatterObj' (ET);<a name="line.72"></a><FONT color="green">073</FONT> * 14-May-2003 : Merged HorizontalLogarithmicAxis and<a name="line.73"></a><FONT color="green">074</FONT> * VerticalLogarithmicAxis (DG);<a name="line.74"></a><FONT color="green">075</FONT> * 29-Oct-2003 : Added workaround for font alignment in PDF output (DG);<a name="line.75"></a><FONT color="green">076</FONT> * 07-Nov-2003 : Modified to use new NumberTick class (DG);<a name="line.76"></a><FONT color="green">077</FONT> * 08-Apr-2004 : Use numberFormatOverride if set - see patch 930139 (DG);<a name="line.77"></a><FONT color="green">078</FONT> * 11-Jan-2005 : Removed deprecated code in preparation for 1.0.0 release (DG);<a name="line.78"></a><FONT color="green">079</FONT> * 21-Apr-2005 : Added support for upper and lower margins; added<a name="line.79"></a><FONT color="green">080</FONT> * get/setAutoRangeNextLogFlag() methods and changed<a name="line.80"></a><FONT color="green">081</FONT> * default to 'autoRangeNextLogFlag'==false (ET);<a name="line.81"></a><FONT color="green">082</FONT> * 22-Apr-2005 : Removed refreshTicks() and fixed names and parameters for<a name="line.82"></a><FONT color="green">083</FONT> * refreshHorizontalTicks() & refreshVerticalTicks();<a name="line.83"></a><FONT color="green">084</FONT> * changed javadoc on setExpTickLabelsFlag() to specify<a name="line.84"></a><FONT color="green">085</FONT> * proper default (ET);<a name="line.85"></a><FONT color="green">086</FONT> * 22-Apr-2005 : Renamed refreshHorizontalTicks --> refreshTicksHorizontal<a name="line.86"></a><FONT color="green">087</FONT> * (and likewise the vertical version) for consistency with<a name="line.87"></a><FONT color="green">088</FONT> * other axis classes (DG);<a name="line.88"></a><FONT color="green">089</FONT> *<a name="line.89"></a><FONT color="green">090</FONT> */<a name="line.90"></a><FONT color="green">091</FONT> <a name="line.91"></a><FONT color="green">092</FONT> package org.jfree.chart.axis;<a name="line.92"></a><FONT color="green">093</FONT> <a name="line.93"></a><FONT color="green">094</FONT> import java.awt.Graphics2D;<a name="line.94"></a><FONT color="green">095</FONT> import java.awt.geom.Rectangle2D;<a name="line.95"></a><FONT color="green">096</FONT> import java.text.DecimalFormat;<a name="line.96"></a><FONT color="green">097</FONT> import java.text.NumberFormat;<a name="line.97"></a><FONT color="green">098</FONT> import java.util.List;<a name="line.98"></a><FONT color="green">099</FONT> <a name="line.99"></a><FONT color="green">100</FONT> import org.jfree.chart.plot.Plot;<a name="line.100"></a><FONT color="green">101</FONT> import org.jfree.chart.plot.ValueAxisPlot;<a name="line.101"></a><FONT color="green">102</FONT> import org.jfree.data.Range;<a name="line.102"></a><FONT color="green">103</FONT> import org.jfree.ui.RectangleEdge;<a name="line.103"></a><FONT color="green">104</FONT> import org.jfree.ui.TextAnchor;<a name="line.104"></a><FONT color="green">105</FONT> <a name="line.105"></a><FONT color="green">106</FONT> /**<a name="line.106"></a><FONT color="green">107</FONT> * A numerical axis that uses a logarithmic scale.<a name="line.107"></a><FONT color="green">108</FONT> *<a name="line.108"></a><FONT color="green">109</FONT> * @author Michael Duffy<a name="line.109"></a><FONT color="green">110</FONT> */<a name="line.110"></a><FONT color="green">111</FONT> public class LogarithmicAxis extends NumberAxis {<a name="line.111"></a><FONT color="green">112</FONT> <a name="line.112"></a><FONT color="green">113</FONT> /** For serialization. */<a name="line.113"></a><FONT color="green">114</FONT> private static final long serialVersionUID = 2502918599004103054L;<a name="line.114"></a><FONT color="green">115</FONT> <a name="line.115"></a><FONT color="green">116</FONT> /** Useful constant for log(10). */<a name="line.116"></a><FONT color="green">117</FONT> public static final double LOG10_VALUE = Math.log(10.0);<a name="line.117"></a><FONT color="green">118</FONT> <a name="line.118"></a><FONT color="green">119</FONT> /** Smallest arbitrarily-close-to-zero value allowed. */<a name="line.119"></a><FONT color="green">120</FONT> public static final double SMALL_LOG_VALUE = 1e-100;<a name="line.120"></a><FONT color="green">121</FONT> <a name="line.121"></a><FONT color="green">122</FONT> /** Flag set true to allow negative values in data. */<a name="line.122"></a><FONT color="green">123</FONT> protected boolean allowNegativesFlag = false;<a name="line.123"></a><FONT color="green">124</FONT> <a name="line.124"></a><FONT color="green">125</FONT> /** Flag set true make axis throw exception if any values are<a name="line.125"></a><FONT color="green">126</FONT> * <= 0 and 'allowNegativesFlag' is false. */<a name="line.126"></a><FONT color="green">127</FONT> protected boolean strictValuesFlag = true;<a name="line.127"></a><FONT color="green">128</FONT> <a name="line.128"></a><FONT color="green">129</FONT> /** Number formatter for generating numeric strings. */<a name="line.129"></a><FONT color="green">130</FONT> protected final NumberFormat numberFormatterObj<a name="line.130"></a><FONT color="green">131</FONT> = NumberFormat.getInstance();<a name="line.131"></a><FONT color="green">132</FONT> <a name="line.132"></a><FONT color="green">133</FONT> /** Flag set true for "1e#"-style tick labels. */<a name="line.133"></a>⌨️ 快捷键说明
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