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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc (build 1.4.2_03) on Mon Jun 07 16:42:31 BST 2004 --><TITLE>CategoryItemRenderer (JFreeChart Class Library (version 0.9.20))</TITLE><META NAME="keywords" CONTENT="org.jfree.chart.renderer.CategoryItemRenderer interface"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="CategoryItemRenderer (JFreeChart Class Library (version 0.9.20))";}</SCRIPT></HEAD><BODY BGCOLOR="white" onload="windowTitle();"><!-- ========= START OF TOP NAVBAR ======= --><A NAME="navbar_top"><!-- --></A><A HREF="#skip-navbar_top" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> PREV CLASS <A HREF="../../../../org/jfree/chart/renderer/PolarItemRenderer.html" title="interface in org.jfree.chart.renderer"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../index.html" target="_top"><B>FRAMES</B></A> <A HREF="CategoryItemRenderer.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">org.jfree.chart.renderer</FONT><BR>Interface CategoryItemRenderer</H2><DL><DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../../org/jfree/chart/renderer/AbstractCategoryItemRenderer.html" title="class in org.jfree.chart.renderer">AbstractCategoryItemRenderer</A>, <A HREF="../../../../org/jfree/chart/renderer/IntervalBarRenderer.html" title="class in org.jfree.chart.renderer">IntervalBarRenderer</A>, <A HREF="../../../../org/jfree/chart/renderer/StatisticalBarRenderer.html" title="class in org.jfree.chart.renderer">StatisticalBarRenderer</A></DD></DL><HR><DL><DT>public interface <B>CategoryItemRenderer</B></DL><P>A plug-in object that is used by the <A HREF="../../../../org/jfree/chart/plot/CategoryPlot.html" title="class in org.jfree.chart.plot"><CODE>CategoryPlot</CODE></A> class to display individual data items from a <A HREF="../../../../org/jfree/data/CategoryDataset.html" title="interface in org.jfree.data"><CODE>CategoryDataset</CODE></A>. <p> This interface defines the methods that must be provided by all renderers. If you are implementing a custom renderer, you should consider extending the <A HREF="../../../../org/jfree/chart/renderer/AbstractCategoryItemRenderer.html" title="class in org.jfree.chart.renderer"><CODE>AbstractCategoryItemRenderer</CODE></A> class. <p> Most renderer attributes are defined using a "three layer" approach. When looking up an attribute (for example, the outline paint) the renderer first checks to see if there is a setting (in layer 0) that applies to ALL items that the renderer draws. If there is, that setting is used, but if it is <code>null</code> the renderer looks up the next layer, which contains "per series" settings for the attribute (many attributes are defined on a per series basis, so this is the layer that is most commonly used). If the layer 1 setting is <code>null</code>, the renderer will look up the final layer, which provides a default or "base" setting. Some attributes allow the base setting to be <code>null</code>, while other attributes enforce non-<code>null</code> values.<P><P><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><!-- ======== CONSTRUCTOR SUMMARY ======== --><!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/renderer/CategoryItemRenderer.html#addChangeListener(org.jfree.chart.event.RendererChangeListener)">addChangeListener</A></B>(<A HREF="../../../../org/jfree/chart/event/RendererChangeListener.html" title="interface in org.jfree.chart.event">RendererChangeListener</A> listener)</CODE><BR> Adds a change listener.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/renderer/CategoryItemRenderer.html#drawBackground(java.awt.Graphics2D, org.jfree.chart.plot.CategoryPlot, java.awt.geom.Rectangle2D)">drawBackground</A></B>(java.awt.Graphics2D g2, <A HREF="../../../../org/jfree/chart/plot/CategoryPlot.html" title="class in org.jfree.chart.plot">CategoryPlot</A> plot, java.awt.geom.Rectangle2D dataArea)</CODE><BR> Draws a background for the data area.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/renderer/CategoryItemRenderer.html#drawDomainGridline(java.awt.Graphics2D, org.jfree.chart.plot.CategoryPlot, java.awt.geom.Rectangle2D, double)">drawDomainGridline</A></B>(java.awt.Graphics2D g2, <A HREF="../../../../org/jfree/chart/plot/CategoryPlot.html" title="class in org.jfree.chart.plot">CategoryPlot</A> plot, java.awt.geom.Rectangle2D dataArea, double value)</CODE><BR> Draws a grid line against the domain axis.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/renderer/CategoryItemRenderer.html#drawItem(java.awt.Graphics2D, org.jfree.chart.renderer.CategoryItemRendererState, java.awt.geom.Rectangle2D, org.jfree.chart.plot.CategoryPlot, org.jfree.chart.axis.CategoryAxis, org.jfree.chart.axis.ValueAxis, org.jfree.data.CategoryDataset, int, int)">drawItem</A></B>(java.awt.Graphics2D g2, <A HREF="../../../../org/jfree/chart/renderer/CategoryItemRendererState.html" title="class in org.jfree.chart.renderer">CategoryItemRendererState</A> state, java.awt.geom.Rectangle2D dataArea, <A HREF="../../../../org/jfree/chart/plot/CategoryPlot.html" title="class in org.jfree.chart.plot">CategoryPlot</A> plot, <A HREF="../../../../org/jfree/chart/axis/CategoryAxis.html" title="class in org.jfree.chart.axis">CategoryAxis</A> domainAxis, <A HREF="../../../../org/jfree/chart/axis/ValueAxis.html" title="class in org.jfree.chart.axis">ValueAxis</A> rangeAxis, <A HREF="../../../../org/jfree/data/CategoryDataset.html" title="interface in org.jfree.data">CategoryDataset</A> data, int row, int column)</CODE><BR> Draws a single data item.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/renderer/CategoryItemRenderer.html#drawOutline(java.awt.Graphics2D, org.jfree.chart.plot.CategoryPlot, java.awt.geom.Rectangle2D)">drawOutline</A></B>(java.awt.Graphics2D g2, <A HREF="../../../../org/jfree/chart/plot/CategoryPlot.html" title="class in org.jfree.chart.plot">CategoryPlot</A> plot, java.awt.geom.Rectangle2D dataArea)</CODE><BR> Draws an outline for the data area.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/renderer/CategoryItemRenderer.html#drawRangeGridline(java.awt.Graphics2D, org.jfree.chart.plot.CategoryPlot, org.jfree.chart.axis.ValueAxis, java.awt.geom.Rectangle2D, double)">drawRangeGridline</A></B>(java.awt.Graphics2D g2, <A HREF="../../../../org/jfree/chart/plot/CategoryPlot.html" title="class in org.jfree.chart.plot">CategoryPlot</A> plot, <A HREF="../../../../org/jfree/chart/axis/ValueAxis.html" title="class in org.jfree.chart.axis">ValueAxis</A> axis, java.awt.geom.Rectangle2D dataArea, double value)</CODE><BR> Draws a grid line against the range axis.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">⌨️ 快捷键说明
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