📄 xyitemrenderer.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> * XYItemRenderer.java<a name="line.28"></a><FONT color="green">029</FONT> * -------------------<a name="line.29"></a><FONT color="green">030</FONT> * (C) Copyright 2001-2005, 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: David Gilbert (for Object Refinery Limited);<a name="line.32"></a><FONT color="green">033</FONT> * Contributor(s): Mark Watson (www.markwatson.com);<a name="line.33"></a><FONT color="green">034</FONT> * Sylvain Vieujot;<a name="line.34"></a><FONT color="green">035</FONT> * Focus Computer Services Limited;<a name="line.35"></a><FONT color="green">036</FONT> * Richard Atkinson;<a name="line.36"></a><FONT color="green">037</FONT> *<a name="line.37"></a><FONT color="green">038</FONT> * $Id: XYItemRenderer.java,v 1.16.2.2 2005/11/30 13:54:11 mungady Exp $<a name="line.38"></a><FONT color="green">039</FONT> *<a name="line.39"></a><FONT color="green">040</FONT> * Changes<a name="line.40"></a><FONT color="green">041</FONT> * -------<a name="line.41"></a><FONT color="green">042</FONT> * 19-Oct-2001 : Version 1, based on code by Mark Watson (DG);<a name="line.42"></a><FONT color="green">043</FONT> * 22-Oct-2001 : Renamed DataSource.java --> Dataset.java etc. (DG);<a name="line.43"></a><FONT color="green">044</FONT> * 13-Dec-2001 : Changed return type of drawItem from void --> Shape. The area<a name="line.44"></a><FONT color="green">045</FONT> * returned can be used as the tooltip region.<a name="line.45"></a><FONT color="green">046</FONT> * 23-Jan-2002 : Added DrawInfo parameter to drawItem() method (DG);<a name="line.46"></a><FONT color="green">047</FONT> * 28-Mar-2002 : Added a property change listener mechanism. Now renderers do <a name="line.47"></a><FONT color="green">048</FONT> * not have to be immutable (DG);<a name="line.48"></a><FONT color="green">049</FONT> * 04-Apr-2002 : Added the initialise() method (DG);<a name="line.49"></a><FONT color="green">050</FONT> * 09-Apr-2002 : Removed the translated zero from the drawItem method, it can <a name="line.50"></a><FONT color="green">051</FONT> * be calculated inside the initialise method if it is required.<a name="line.51"></a><FONT color="green">052</FONT> * Added a new getToolTipGenerator() method. Changed the return <a name="line.52"></a><FONT color="green">053</FONT> * type for drawItem() to void (DG);<a name="line.53"></a><FONT color="green">054</FONT> * 24-May-2002 : Added ChartRenderingInfo the initialise method API (DG);<a name="line.54"></a><FONT color="green">055</FONT> * 25-Jun-2002 : Removed redundant import (DG);<a name="line.55"></a><FONT color="green">056</FONT> * 20-Aug-2002 : Added get/setURLGenerator methods to interface (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> * 18-Nov-2002 : Added methods for drawing grid lines (DG);<a name="line.58"></a><FONT color="green">059</FONT> * 17-Jan-2003 : Moved plot classes into a separate package (DG);<a name="line.59"></a><FONT color="green">060</FONT> * 27-Jan-2003 : Added shape lookup table (DG);<a name="line.60"></a><FONT color="green">061</FONT> * 05-Jun-2003 : Added domain and range grid bands (sponsored by Focus Computer<a name="line.61"></a><FONT color="green">062</FONT> * Services Ltd) (DG);<a name="line.62"></a><FONT color="green">063</FONT> * 27-Jul-2003 : Added getRangeType() to support stacked XY area charts (RA);<a name="line.63"></a><FONT color="green">064</FONT> * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);<a name="line.64"></a><FONT color="green">065</FONT> * 25-Feb-2004 : Replaced CrosshairInfo with CrosshairState. Renamed <a name="line.65"></a><FONT color="green">066</FONT> * XYToolTipGenerator --> XYItemLabelGenerator (DG);<a name="line.66"></a><FONT color="green">067</FONT> * 26-Feb-2004 : Added lots of new methods (DG);<a name="line.67"></a><FONT color="green">068</FONT> * 30-Apr-2004 : Added getRangeExtent() method (DG);<a name="line.68"></a><FONT color="green">069</FONT> * 06-May-2004 : Added methods for controlling item label visibility (DG);<a name="line.69"></a><FONT color="green">070</FONT> * 13-May-2004 : Removed property change listener mechanism (DG);<a name="line.70"></a><FONT color="green">071</FONT> * 18-May-2004 : Added item label font and paint methods (DG);<a name="line.71"></a><FONT color="green">072</FONT> * 10-Sep-2004 : Removed redundant getRangeType() method (DG);<a name="line.72"></a><FONT color="green">073</FONT> * 06-Oct-2004 : Replaced getRangeExtent() with findRangeBounds() and added <a name="line.73"></a><FONT color="green">074</FONT> * findDomainBounds (DG);<a name="line.74"></a><FONT color="green">075</FONT> * 23-Nov-2004 : Changed drawRangeGridLine() --> drawRangeLine() (DG);<a name="line.75"></a><FONT color="green">076</FONT> * 07-Jan-2005 : Removed deprecated method (DG);<a name="line.76"></a><FONT color="green">077</FONT> * 24-Feb-2005 : Now extends LegendItemSource (DG);<a name="line.77"></a><FONT color="green">078</FONT> * 20-Apr-2005 : Renamed XYLabelGenerator --> XYItemLabelGenerator (DG);<a name="line.78"></a><FONT color="green">079</FONT> *<a name="line.79"></a><FONT color="green">080</FONT> */<a name="line.80"></a><FONT color="green">081</FONT> <a name="line.81"></a><FONT color="green">082</FONT> package org.jfree.chart.renderer.xy;<a name="line.82"></a><FONT color="green">083</FONT> <a name="line.83"></a><FONT color="green">084</FONT> import java.awt.Font;<a name="line.84"></a><FONT color="green">085</FONT> import java.awt.Graphics2D;<a name="line.85"></a><FONT color="green">086</FONT> import java.awt.Paint;<a name="line.86"></a><FONT color="green">087</FONT> import java.awt.Shape;<a name="line.87"></a><FONT color="green">088</FONT> import java.awt.Stroke;<a name="line.88"></a><FONT color="green">089</FONT> import java.awt.geom.Rectangle2D;<a name="line.89"></a><FONT color="green">090</FONT> <a name="line.90"></a><FONT color="green">091</FONT> import org.jfree.chart.LegendItem;<a name="line.91"></a><FONT color="green">092</FONT> import org.jfree.chart.LegendItemSource;<a name="line.92"></a><FONT color="green">093</FONT> import org.jfree.chart.annotations.XYAnnotation;<a name="line.93"></a><FONT color="green">094</FONT> import org.jfree.chart.axis.ValueAxis;<a name="line.94"></a><FONT color="green">095</FONT> import org.jfree.chart.event.RendererChangeEvent;<a name="line.95"></a><FONT color="green">096</FONT> import org.jfree.chart.event.RendererChangeListener;<a name="line.96"></a><FONT color="green">097</FONT> import org.jfree.chart.labels.ItemLabelPosition;<a name="line.97"></a><FONT color="green">098</FONT> import org.jfree.chart.labels.XYItemLabelGenerator;<a name="line.98"></a><FONT color="green">099</FONT> import org.jfree.chart.labels.XYSeriesLabelGenerator;<a name="line.99"></a><FONT color="green">100</FONT> import org.jfree.chart.labels.XYToolTipGenerator;<a name="line.100"></a><FONT color="green">101</FONT> import org.jfree.chart.plot.CrosshairState;<a name="line.101"></a><FONT color="green">102</FONT> import org.jfree.chart.plot.Marker;<a name="line.102"></a><FONT color="green">103</FONT> import org.jfree.chart.plot.PlotRenderingInfo;<a name="line.103"></a><FONT color="green">104</FONT> import org.jfree.chart.plot.XYPlot;<a name="line.104"></a><FONT color="green">105</FONT> import org.jfree.chart.urls.XYURLGenerator;<a name="line.105"></a><FONT color="green">106</FONT> import org.jfree.data.Range;<a name="line.106"></a><FONT color="green">107</FONT> import org.jfree.data.xy.XYDataset;<a name="line.107"></a><FONT color="green">108</FONT> import org.jfree.ui.Layer;<a name="line.108"></a><FONT color="green">109</FONT> <a name="line.109"></a><FONT color="green">110</FONT> /**<a name="line.110"></a><FONT color="green">111</FONT> * Interface for rendering the visual representation of a single (x, y) item on<a name="line.111"></a><FONT color="green">112</FONT> * an {@link XYPlot}.<a name="line.112"></a><FONT color="green">113</FONT> * <p><a name="line.113"></a><FONT color="green">114</FONT> * To support cloning charts, it is recommended that renderers implement both <a name="line.114"></a><FONT color="green">115</FONT> * the {@link Cloneable} and <code>PublicCloneable</code> interfaces.<a name="line.115"></a><FONT color="green">116</FONT> */<a name="line.116"></a><FONT color="green">117</FONT> public interface XYItemRenderer extends LegendItemSource {<a name="line.117"></a><FONT color="green">118</FONT> <a name="line.118"></a><FONT color="green">119</FONT> /**<a name="line.119"></a><FONT color="green">120</FONT> * Initialises the renderer then returns the number of 'passes' through the<a name="line.120"></a><FONT color="green">121</FONT> * data that the renderer will require (usually just one). This method <a name="line.121"></a><FONT color="green">122</FONT> * will be called before the first item is rendered, giving the renderer <a name="line.122"></a><FONT color="green">123</FONT> * an opportunity to initialise any state information it wants to maintain.<a name="line.123"></a><FONT color="green">124</FONT> * The renderer can do nothing if it chooses.<a name="line.124"></a><FONT color="green">125</FONT> *<a name="line.125"></a><FONT color="green">126</FONT> * @param g2 the graphics device.<a name="line.126"></a><FONT color="green">127</FONT> * @param dataArea the area inside the axes.<a name="line.127"></a><FONT color="green">128</FONT> * @param plot the plot.<a name="line.128"></a><FONT color="green">129</FONT> * @param dataset the dataset.<a name="line.129"></a><FONT color="green">130</FONT> * @param info an optional info collection object to return data back to <a name="line.130"></a><FONT color="green">131</FONT> * the caller.<a name="line.131"></a><FONT color="green">132</FONT> *<a name="line.132"></a><FONT color="green">133</FONT> * @return The number of passes the renderer requires.<a name="line.133"></a><FONT color="green">134</FONT> */<a name="line.134"></a><FONT color="green">135</FONT> public XYItemRendererState initialise(Graphics2D g2,<a name="line.135"></a><FONT color="green">136</FONT> Rectangle2D dataArea,<a name="line.136"></a><FONT color="green">137</FONT> XYPlot plot,<a name="line.137"></a><FONT color="green">138</FONT> XYDataset dataset,<a name="line.138"></a><FONT color="green">139</FONT> PlotRenderingInfo info);<a name="line.139"></a>⌨️ 快捷键说明
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