xybarrenderer.html

JFreeChart 9.20的文档 需要用JAVA在网页上做统计图的东东

<DD>Constructs a new renderer.
<P>
<DT><B>Parameters:</B><DD><CODE>margin</CODE> - the percentage amount to trim from the width of each bar.</DL>

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<B>Method Detail</B></FONT></TD>
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<A NAME="getMargin()"><!-- --></A><H3>
getMargin</H3>
<PRE>
public double <B>getMargin</B>()</PRE>
<DL>
<DD>Returns the margin which is a percentage amount by which the bars are trimmed.
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<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The margin.</DL>
</DD>
</DL>
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<A NAME="setMargin(double)"><!-- --></A><H3>
setMargin</H3>
<PRE>
public void <B>setMargin</B>(double&nbsp;margin)</PRE>
<DL>
<DD>Sets the percentage amount by which the bars are trimmed and sends a 
 <A HREF="../../../../org/jfree/chart/event/RendererChangeEvent.html" title="class in org.jfree.chart.event"><CODE>RendererChangeEvent</CODE></A> to all registered listeners.
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<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>margin</CODE> - the new margin.</DL>
</DD>
</DL>
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<A NAME="getGradientPaintTransformer()"><!-- --></A><H3>
getGradientPaintTransformer</H3>
<PRE>
public org.jfree.ui.GradientPaintTransformer <B>getGradientPaintTransformer</B>()</PRE>
<DL>
<DD>Returns the gradient paint transformer (an object used to transform gradient paint objects
 to fit each bar.
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<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>A transformer (<code>null</code> possible).</DL>
</DD>
</DL>
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<A NAME="setGradientPaintTransformer(org.jfree.ui.GradientPaintTransformer)"><!-- --></A><H3>
setGradientPaintTransformer</H3>
<PRE>
public void <B>setGradientPaintTransformer</B>(org.jfree.ui.GradientPaintTransformer&nbsp;transformer)</PRE>
<DL>
<DD>Sets the gradient paint transformer and sends a <A HREF="../../../../org/jfree/chart/event/RendererChangeEvent.html" title="class in org.jfree.chart.event"><CODE>RendererChangeEvent</CODE></A> to all registered
 listeners.
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<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>transformer</CODE> - the transformer (<code>null</code> permitted).</DL>
</DD>
</DL>
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<A NAME="initialise(java.awt.Graphics2D, java.awt.geom.Rectangle2D, org.jfree.chart.plot.XYPlot, org.jfree.data.XYDataset, org.jfree.chart.plot.PlotRenderingInfo)"><!-- --></A><H3>
initialise</H3>
<PRE>
public <A HREF="../../../../org/jfree/chart/renderer/XYItemRendererState.html" title="class in org.jfree.chart.renderer">XYItemRendererState</A> <B>initialise</B>(java.awt.Graphics2D&nbsp;g2,
                                      java.awt.geom.Rectangle2D&nbsp;dataArea,
                                      <A HREF="../../../../org/jfree/chart/plot/XYPlot.html" title="class in org.jfree.chart.plot">XYPlot</A>&nbsp;plot,
                                      <A HREF="../../../../org/jfree/data/XYDataset.html" title="interface in org.jfree.data">XYDataset</A>&nbsp;dataset,
                                      <A HREF="../../../../org/jfree/chart/plot/PlotRenderingInfo.html" title="class in org.jfree.chart.plot">PlotRenderingInfo</A>&nbsp;info)</PRE>
<DL>
<DD>Initialises the renderer and returns a state object that should be passed to all subsequent
 calls to the drawItem() method.  Here we calculate the Java2D y-coordinate for zero, since 
 all the bars have their bases fixed at zero.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/jfree/chart/renderer/XYItemRenderer.html#initialise(java.awt.Graphics2D, java.awt.geom.Rectangle2D, org.jfree.chart.plot.XYPlot, org.jfree.data.XYDataset, org.jfree.chart.plot.PlotRenderingInfo)">initialise</A></CODE> in interface <CODE><A HREF="../../../../org/jfree/chart/renderer/XYItemRenderer.html" title="interface in org.jfree.chart.renderer">XYItemRenderer</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../org/jfree/chart/renderer/AbstractXYItemRenderer.html#initialise(java.awt.Graphics2D, java.awt.geom.Rectangle2D, org.jfree.chart.plot.XYPlot, org.jfree.data.XYDataset, org.jfree.chart.plot.PlotRenderingInfo)">initialise</A></CODE> in class <CODE><A HREF="../../../../org/jfree/chart/renderer/AbstractXYItemRenderer.html" title="class in org.jfree.chart.renderer">AbstractXYItemRenderer</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>g2</CODE> - the graphics device.<DD><CODE>dataArea</CODE> - the area inside the axes.<DD><CODE>plot</CODE> - the plot.<DD><CODE>dataset</CODE> - the data.<DD><CODE>info</CODE> - an optional info collection object to return data back to the caller.
<DT><B>Returns:</B><DD>A state object.</DL>
</DD>