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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 2000-2006, 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> * PiePlot.java<a name="line.28"></a><FONT color="green">029</FONT> * ------------<a name="line.29"></a><FONT color="green">030</FONT> * (C) Copyright 2000-2006, by Andrzej Porebski and Contributors.<a name="line.30"></a><FONT color="green">031</FONT> *<a name="line.31"></a><FONT color="green">032</FONT> * Original Author: Andrzej Porebski;<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> * Martin Cordova (percentages in labels);<a name="line.34"></a><FONT color="green">035</FONT> * Richard Atkinson (URL support for image maps);<a name="line.35"></a><FONT color="green">036</FONT> * Christian W. Zuckschwerdt;<a name="line.36"></a><FONT color="green">037</FONT> * Arnaud Lelievre;<a name="line.37"></a><FONT color="green">038</FONT> * Andreas Schroeder (very minor);<a name="line.38"></a><FONT color="green">039</FONT> *<a name="line.39"></a><FONT color="green">040</FONT> * $Id: PiePlot.java,v 1.17.2.11 2006/02/28 16:16:55 mungady Exp $<a name="line.40"></a><FONT color="green">041</FONT> *<a name="line.41"></a><FONT color="green">042</FONT> * Changes (from 21-Jun-2001)<a name="line.42"></a><FONT color="green">043</FONT> * --------------------------<a name="line.43"></a><FONT color="green">044</FONT> * 21-Jun-2001 : Removed redundant JFreeChart parameter from constructors (DG);<a name="line.44"></a><FONT color="green">045</FONT> * 18-Sep-2001 : Updated header (DG);<a name="line.45"></a><FONT color="green">046</FONT> * 15-Oct-2001 : Data source classes moved to com.jrefinery.data.* (DG);<a name="line.46"></a><FONT color="green">047</FONT> * 19-Oct-2001 : Moved series paint and stroke methods from JFreeChart.java to <a name="line.47"></a><FONT color="green">048</FONT> * Plot.java (DG);<a name="line.48"></a><FONT color="green">049</FONT> * 22-Oct-2001 : Renamed DataSource.java --> Dataset.java etc. (DG);<a name="line.49"></a><FONT color="green">050</FONT> * 13-Nov-2001 : Modified plot subclasses so that null axes are possible for <a name="line.50"></a><FONT color="green">051</FONT> * pie plot (DG);<a name="line.51"></a><FONT color="green">052</FONT> * 17-Nov-2001 : Added PieDataset interface and amended this class accordingly,<a name="line.52"></a><FONT color="green">053</FONT> * and completed removal of BlankAxis class as it is no longer <a name="line.53"></a><FONT color="green">054</FONT> * required (DG);<a name="line.54"></a><FONT color="green">055</FONT> * 19-Nov-2001 : Changed 'drawCircle' property to 'circular' property (DG);<a name="line.55"></a><FONT color="green">056</FONT> * 21-Nov-2001 : Added options for exploding pie sections and filled out range <a name="line.56"></a><FONT color="green">057</FONT> * of properties (DG);<a name="line.57"></a><FONT color="green">058</FONT> * Added option for percentages in chart labels, based on code<a name="line.58"></a><FONT color="green">059</FONT> * by Martin Cordova (DG);<a name="line.59"></a><FONT color="green">060</FONT> * 30-Nov-2001 : Changed default font from "Arial" --> "SansSerif" (DG);<a name="line.60"></a><FONT color="green">061</FONT> * 12-Dec-2001 : Removed unnecessary 'throws' clause in constructor (DG);<a name="line.61"></a><FONT color="green">062</FONT> * 13-Dec-2001 : Added tooltips (DG);<a name="line.62"></a><FONT color="green">063</FONT> * 16-Jan-2002 : Renamed tooltips class (DG);<a name="line.63"></a><FONT color="green">064</FONT> * 22-Jan-2002 : Fixed bug correlating legend labels with pie data (DG);<a name="line.64"></a><FONT color="green">065</FONT> * 05-Feb-2002 : Added alpha-transparency to plot class, and updated <a name="line.65"></a><FONT color="green">066</FONT> * constructors accordingly (DG);<a name="line.66"></a><FONT color="green">067</FONT> * 06-Feb-2002 : Added optional background image and alpha-transparency to Plot<a name="line.67"></a><FONT color="green">068</FONT> * and subclasses. Clipped drawing within plot area (DG);<a name="line.68"></a><FONT color="green">069</FONT> * 26-Mar-2002 : Added an empty zoom method (DG);<a name="line.69"></a><FONT color="green">070</FONT> * 18-Apr-2002 : PieDataset is no longer sorted (oldman);<a name="line.70"></a><FONT color="green">071</FONT> * 23-Apr-2002 : Moved dataset from JFreeChart to Plot. Added <a name="line.71"></a><FONT color="green">072</FONT> * getLegendItemLabels() method (DG);<a name="line.72"></a><FONT color="green">073</FONT> * 19-Jun-2002 : Added attributes to control starting angle and direction <a name="line.73"></a><FONT color="green">074</FONT> * (default is now clockwise) (DG);<a name="line.74"></a><FONT color="green">075</FONT> * 25-Jun-2002 : Removed redundant imports (DG);<a name="line.75"></a><FONT color="green">076</FONT> * 02-Jul-2002 : Fixed sign of percentage bug introduced in 0.9.2 (DG);<a name="line.76"></a><FONT color="green">077</FONT> * 16-Jul-2002 : Added check for null dataset in getLegendItemLabels() (DG);<a name="line.77"></a><FONT color="green">078</FONT> * 30-Jul-2002 : Moved summation code to DatasetUtilities (DG);<a name="line.78"></a><FONT color="green">079</FONT> * 05-Aug-2002 : Added URL support for image maps - new member variable for<a name="line.79"></a><FONT color="green">080</FONT> * urlGenerator, modified constructor and minor change to the <a name="line.80"></a><FONT color="green">081</FONT> * draw method (RA);<a name="line.81"></a><FONT color="green">082</FONT> * 18-Sep-2002 : Modified the percent label creation and added setters for the<a name="line.82"></a><FONT color="green">083</FONT> * formatters (AS);<a name="line.83"></a><FONT color="green">084</FONT> * 24-Sep-2002 : Added getLegendItems() method (DG);<a name="line.84"></a><FONT color="green">085</FONT> * 02-Oct-2002 : Fixed errors reported by Checkstyle (DG);<a name="line.85"></a><FONT color="green">086</FONT> * 09-Oct-2002 : Added check for null entity collection (DG);<a name="line.86"></a><FONT color="green">087</FONT> * 30-Oct-2002 : Changed PieDataset interface (DG);<a name="line.87"></a><FONT color="green">088</FONT> * 18-Nov-2002 : Changed CategoryDataset to TableDataset (DG);<a name="line.88"></a><FONT color="green">089</FONT> * 02-Jan-2003 : Fixed "no data" message (DG);<a name="line.89"></a><FONT color="green">090</FONT> * 23-Jan-2003 : Modified to extract data from rows OR columns in <a name="line.90"></a><FONT color="green">091</FONT> * CategoryDataset (DG);<a name="line.91"></a><FONT color="green">092</FONT> * 14-Feb-2003 : Fixed label drawing so that foreground alpha does not apply <a name="line.92"></a><FONT color="green">093</FONT> * (bug id 685536) (DG);<a name="line.93"></a><FONT color="green">094</FONT> * 07-Mar-2003 : Modified to pass pieIndex on to PieSectionEntity and tooltip <a name="line.94"></a><FONT color="green">095</FONT> * and URL generators (DG);<a name="line.95"></a><FONT color="green">096</FONT> * 21-Mar-2003 : Added a minimum angle for drawing arcs <a name="line.96"></a><FONT color="green">097</FONT> * (see bug id 620031) (DG);<a name="line.97"></a><FONT color="green">098</FONT> * 24-Apr-2003 : Switched around PieDataset and KeyedValuesDataset (DG);<a name="line.98"></a><FONT color="green">099</FONT> * 02-Jun-2003 : Fixed bug 721733 (DG);<a name="line.99"></a><FONT color="green">100</FONT> * 30-Jul-2003 : Modified entity constructor (CZ);<a name="line.100"></a><FONT color="green">101</FONT> * 19-Aug-2003 : Implemented Cloneable (DG);<a name="line.101"></a><FONT color="green">102</FONT> * 29-Aug-2003 : Fixed bug 796936 (null pointer on setOutlinePaint()) (DG);<a name="line.102"></a><FONT color="green">103</FONT> * 08-Sep-2003 : Added internationalization via use of properties <a name="line.103"></a><FONT color="green">104</FONT> * resourceBundle (RFE 690236) (AL);<a name="line.104"></a><FONT color="green">105</FONT> * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);<a name="line.105"></a><FONT color="green">106</FONT> * 29-Oct-2003 : Added workaround for font alignment in PDF output (DG);<a name="line.106"></a><FONT color="green">107</FONT> * 05-Nov-2003 : Fixed missing legend bug (DG);<a name="line.107"></a><FONT color="green">108</FONT> * 10-Nov-2003 : Re-added the DatasetChangeListener to constructors (CZ);<a name="line.108"></a><FONT color="green">109</FONT> * 29-Jan-2004 : Fixed clipping bug in draw() method (DG);<a name="line.109"></a><FONT color="green">110</FONT> * 11-Mar-2004 : Major overhaul to improve labelling (DG);<a name="line.110"></a><FONT color="green">111</FONT> * 31-Mar-2004 : Made an adjustment for the plot area when the label generator <a name="line.111"></a><FONT color="green">112</FONT> * is null. Fixed null pointer exception when the label <a name="line.112"></a><FONT color="green">113</FONT> * generator returns null for a label (DG);<a name="line.113"></a><FONT color="green">114</FONT> * 06-Apr-2004 : Added getter, setter, serialization and draw support for <a name="line.114"></a><FONT color="green">115</FONT> * labelBackgroundPaint (AS);<a name="line.115"></a><FONT color="green">116</FONT> * 08-Apr-2004 : Added flag to control whether null values are ignored or <a name="line.116"></a><FONT color="green">117</FONT> * not (DG);<a name="line.117"></a><FONT color="green">118</FONT> * 15-Apr-2004 : Fixed some minor warnings from Eclipse (DG);<a name="line.118"></a><FONT color="green">119</FONT> * 26-Apr-2004 : Added attributes for label outline and shadow (DG);<a name="line.119"></a><FONT color="green">120</FONT> * 04-Oct-2004 : Renamed ShapeUtils --> ShapeUtilities (DG);<a name="line.120"></a><FONT color="green">121</FONT> * 04-Nov-2004 : Fixed null pointer exception with new LegendTitle class (DG);<a name="line.121"></a><FONT color="green">122</FONT> * 09-Nov-2004 : Added user definable legend item shape (DG);<a name="line.122"></a><FONT color="green">123</FONT> * 25-Nov-2004 : Added new legend label generator (DG);<a name="line.123"></a><FONT color="green">124</FONT> * 20-Apr-2005 : Added a tool tip generator for legend labels (DG);<a name="line.124"></a><FONT color="green">125</FONT> * 26-Apr-2005 : Removed LOGGER (DG);<a name="line.125"></a><FONT color="green">126</FONT> * 05-May-2005 : Updated draw() method parameters (DG);<a name="line.126"></a><FONT color="green">127</FONT> * 10-May-2005 : Added flag to control visibility of label linking lines, plus<a name="line.127"></a><FONT color="green">128</FONT> * another flag to control the handling of zero values (DG);<a name="line.128"></a><FONT color="green">129</FONT> * 08-Jun-2005 : Fixed bug in getLegendItems() method (not respecting flags<a name="line.129"></a><FONT color="green">130</FONT> * for ignoring null and zero values), and fixed equals() method <a name="line.130"></a><FONT color="green">131</FONT> * to handle GradientPaint (DG);<a name="line.131"></a><FONT color="green">132</FONT> * 15-Jul-2005 : Added sectionOutlinesVisible attribute (DG);<a name="line.132"></a><FONT color="green">133</FONT> * ------------- JFREECHART 1.0.0 ---------------------------------------------<a name="line.133"></a><FONT color="green">134</FONT> * 09-Jan-2006 : Fixed bug 1400442, inconsistent treatment of null and zero<a name="line.134"></a><FONT color="green">135</FONT> * values in dataset (DG);<a name="line.135"></a><FONT color="green">136</FONT> * 28-Feb-2006 : Fixed bug 1440415, bad distribution of pie section <a name="line.136"></a><FONT color="green">137</FONT> * labels (DG);<a name="line.137"></a><FONT color="green">138</FONT> * <a name="line.138"></a>⌨️ 快捷键说明
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