📄 stackedarearenderer.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> * StackedAreaRenderer.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 Dan Rivett (d.rivett@ukonline.co.uk) and <a name="line.30"></a><FONT color="green">031</FONT> * Contributors.<a name="line.31"></a><FONT color="green">032</FONT> *<a name="line.32"></a><FONT color="green">033</FONT> * Original Author: Dan Rivett (adapted from AreaCategoryItemRenderer);<a name="line.33"></a><FONT color="green">034</FONT> * Contributor(s): Jon Iles;<a name="line.34"></a><FONT color="green">035</FONT> * David Gilbert (for Object Refinery Limited);<a name="line.35"></a><FONT color="green">036</FONT> * Christian W. Zuckschwerdt;<a name="line.36"></a><FONT color="green">037</FONT> *<a name="line.37"></a><FONT color="green">038</FONT> * $Id: StackedAreaRenderer.java,v 1.6.2.2 2005/10/25 20:54:16 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> * 20-Sep-2002 : Version 1, contributed by Dan Rivett;<a name="line.42"></a><FONT color="green">043</FONT> * 24-Oct-2002 : Amendments for changes in CategoryDataset interface and <a name="line.43"></a><FONT color="green">044</FONT> * CategoryToolTipGenerator interface (DG);<a name="line.44"></a><FONT color="green">045</FONT> * 01-Nov-2002 : Added tooltips (DG);<a name="line.45"></a><FONT color="green">046</FONT> * 06-Nov-2002 : Renamed drawCategoryItem() --> drawItem() and now using axis <a name="line.46"></a><FONT color="green">047</FONT> * for category spacing. Renamed StackedAreaCategoryItemRenderer <a name="line.47"></a><FONT color="green">048</FONT> * --> StackedAreaRenderer (DG);<a name="line.48"></a><FONT color="green">049</FONT> * 26-Nov-2002 : Switched CategoryDataset --> TableDataset (DG);<a name="line.49"></a><FONT color="green">050</FONT> * 26-Nov-2002 : Replaced isStacked() method with getRangeType() method (DG);<a name="line.50"></a><FONT color="green">051</FONT> * 17-Jan-2003 : Moved plot classes to a separate package (DG);<a name="line.51"></a><FONT color="green">052</FONT> * 25-Mar-2003 : Implemented Serializable (DG);<a name="line.52"></a><FONT color="green">053</FONT> * 13-May-2003 : Modified to take into account the plot orientation (DG);<a name="line.53"></a><FONT color="green">054</FONT> * 30-Jul-2003 : Modified entity constructor (CZ);<a name="line.54"></a><FONT color="green">055</FONT> * 07-Oct-2003 : Added renderer state (DG);<a name="line.55"></a><FONT color="green">056</FONT> * 29-Apr-2004 : Added getRangeExtent() override (DG);<a name="line.56"></a><FONT color="green">057</FONT> * 05-Nov-2004 : Modified drawItem() signature (DG);<a name="line.57"></a><FONT color="green">058</FONT> * 07-Jan-2005 : Renamed getRangeExtent() --> findRangeBounds() (DG);<a name="line.58"></a><FONT color="green">059</FONT> * <a name="line.59"></a><FONT color="green">060</FONT> */<a name="line.60"></a><FONT color="green">061</FONT> <a name="line.61"></a><FONT color="green">062</FONT> package org.jfree.chart.renderer.category;<a name="line.62"></a><FONT color="green">063</FONT> <a name="line.63"></a><FONT color="green">064</FONT> import java.awt.Graphics2D;<a name="line.64"></a><FONT color="green">065</FONT> import java.awt.Polygon;<a name="line.65"></a><FONT color="green">066</FONT> import java.awt.Shape;<a name="line.66"></a><FONT color="green">067</FONT> import java.awt.geom.Rectangle2D;<a name="line.67"></a><FONT color="green">068</FONT> import java.io.Serializable;<a name="line.68"></a><FONT color="green">069</FONT> <a name="line.69"></a><FONT color="green">070</FONT> import org.jfree.chart.axis.CategoryAxis;<a name="line.70"></a><FONT color="green">071</FONT> import org.jfree.chart.axis.ValueAxis;<a name="line.71"></a><FONT color="green">072</FONT> import org.jfree.chart.entity.EntityCollection;<a name="line.72"></a><FONT color="green">073</FONT> import org.jfree.chart.plot.CategoryPlot;<a name="line.73"></a><FONT color="green">074</FONT> import org.jfree.chart.plot.PlotOrientation;<a name="line.74"></a><FONT color="green">075</FONT> import org.jfree.data.Range;<a name="line.75"></a><FONT color="green">076</FONT> import org.jfree.data.category.CategoryDataset;<a name="line.76"></a><FONT color="green">077</FONT> import org.jfree.data.general.DatasetUtilities;<a name="line.77"></a><FONT color="green">078</FONT> import org.jfree.ui.RectangleEdge;<a name="line.78"></a><FONT color="green">079</FONT> import org.jfree.util.PublicCloneable;<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> * A renderer that draws stacked area charts for a <a name="line.82"></a><FONT color="green">083</FONT> * {@link org.jfree.chart.plot.CategoryPlot}.<a name="line.83"></a><FONT color="green">084</FONT> *<a name="line.84"></a><FONT color="green">085</FONT> * @author Dan Rivett<a name="line.85"></a><FONT color="green">086</FONT> */<a name="line.86"></a><FONT color="green">087</FONT> public class StackedAreaRenderer extends AreaRenderer <a name="line.87"></a><FONT color="green">088</FONT> implements Cloneable, PublicCloneable, <a name="line.88"></a><FONT color="green">089</FONT> Serializable {<a name="line.89"></a><FONT color="green">090</FONT> <a name="line.90"></a><FONT color="green">091</FONT> /** For serialization. */<a name="line.91"></a><FONT color="green">092</FONT> private static final long serialVersionUID = -3595635038460823663L;<a name="line.92"></a><FONT color="green">093</FONT> <a name="line.93"></a><FONT color="green">094</FONT> /**<a name="line.94"></a><FONT color="green">095</FONT> * Creates a new renderer.<a name="line.95"></a><FONT color="green">096</FONT> */<a name="line.96"></a><FONT color="green">097</FONT> public StackedAreaRenderer() {<a name="line.97"></a><FONT color="green">098</FONT> super();<a name="line.98"></a><FONT color="green">099</FONT> }<a name="line.99"></a><FONT color="green">100</FONT> <a name="line.100"></a><FONT color="green">101</FONT> /**<a name="line.101"></a><FONT color="green">102</FONT> * Returns the range of values the renderer requires to display all the <a name="line.102"></a><FONT color="green">103</FONT> * items from the specified dataset.<a name="line.103"></a><FONT color="green">104</FONT> * <a name="line.104"></a><FONT color="green">105</FONT> * @param dataset the dataset (<code>null</code> not permitted).<a name="line.105"></a><FONT color="green">106</FONT> * <a name="line.106"></a><FONT color="green">107</FONT> * @return The range (or <code>null</code> if the dataset is empty).<a name="line.107"></a><FONT color="green">108</FONT> */<a name="line.108"></a><FONT color="green">109</FONT> public Range findRangeBounds(CategoryDataset dataset) {<a name="line.109"></a><FONT color="green">110</FONT> return DatasetUtilities.findStackedRangeBounds(dataset); <a name="line.110"></a><FONT color="green">111</FONT> }<a name="line.111"></a><FONT color="green">112</FONT> <a name="line.112"></a><FONT color="green">113</FONT> /**<a name="line.113"></a><FONT color="green">114</FONT> * Draw a single data item.<a name="line.114"></a><FONT color="green">115</FONT> *<a name="line.115"></a><FONT color="green">116</FONT> * @param g2 the graphics device.<a name="line.116"></a><FONT color="green">117</FONT> * @param state the renderer state.<a name="line.117"></a><FONT color="green">118</FONT> * @param dataArea the data plot area.<a name="line.118"></a><FONT color="green">119</FONT> * @param plot the plot.<a name="line.119"></a><FONT color="green">120</FONT> * @param domainAxis the domain axis.<a name="line.120"></a><FONT color="green">121</FONT> * @param rangeAxis the range axis.<a name="line.121"></a><FONT color="green">122</FONT> * @param dataset the data.<a name="line.122"></a><FONT color="green">123</FONT> * @param row the row index (zero-based).<a name="line.123"></a><FONT color="green">124</FONT> * @param column the column index (zero-based).<a name="line.124"></a><FONT color="green">125</FONT> * @param pass the pass index.<a name="line.125"></a><FONT color="green">126</FONT> */<a name="line.126"></a><FONT color="green">127</FONT> public void drawItem(Graphics2D g2,<a name="line.127"></a><FONT color="green">128</FONT> CategoryItemRendererState state,<a name="line.128"></a><FONT color="green">129</FONT> Rectangle2D dataArea,<a name="line.129"></a><FONT color="green">130</FONT> CategoryPlot plot,<a name="line.130"></a><FONT color="green">131</FONT> CategoryAxis domainAxis,<a name="line.131"></a><FONT color="green">132</FONT> ValueAxis rangeAxis,<a name="line.132"></a><FONT color="green">133</FONT> CategoryDataset dataset,<a name="line.133"></a><FONT color="green">134</FONT> int row,<a name="line.134"></a><FONT color="green">135</FONT> int column,<a name="line.135"></a><FONT color="green">136</FONT> int pass) {<a name="line.136"></a><FONT color="green">137</FONT> <a name="line.137"></a><FONT color="green">138</FONT> // plot non-null values...<a name="line.138"></a><FONT color="green">139</FONT> Number value = dataset.getValue(row, column);<a name="line.139"></a><FONT color="green">140</FONT> if (value == null) {<a name="line.140"></a><FONT color="green">141</FONT> return;<a name="line.141"></a><FONT color="green">142</FONT> }<a name="line.142"></a><FONT color="green">143</FONT> <a name="line.143"></a><FONT color="green">144</FONT> // leave the y values (y1, y0) untranslated as it is going to be be <a name="line.144"></a><FONT color="green">145</FONT> // stacked up later by previous series values, after this it will be <a name="line.145"></a><FONT color="green">146</FONT> // translated.<a name="line.146"></a><FONT color="green">147</FONT> double x1 = domainAxis.getCategoryMiddle(<a name="line.147"></a><FONT color="green">148</FONT> column, getColumnCount(), dataArea, plot.getDomainAxisEdge()<a name="line.148"></a><FONT color="green">149</FONT> );<a name="line.149"></a><FONT color="green">150</FONT> double y1 = 0.0; // calculate later<a name="line.150"></a><FONT color="green">151</FONT> double y1Untranslated = value.doubleValue();<a name="line.151"></a><FONT color="green">152</FONT> <a name="line.152"></a><FONT color="green">153</FONT> g2.setPaint(getItemPaint(row, column));<a name="line.153"></a><FONT color="green">154</FONT> g2.setStroke(getItemStroke(row, column));<a name="line.154"></a><FONT color="green">155</FONT> <a name="line.155"></a><FONT color="green">156</FONT> if (column != 0) {<a name="line.156"></a><FONT color="green">157</FONT> <a name="line.157"></a><FONT color="green">158</FONT> Number previousValue = dataset.getValue(row, column - 1);<a name="line.158"></a>⌨️ 快捷键说明
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