crosshairstate.html

jfreechart1。0。2的api。

<A NAME="CrosshairState()"><!-- --></A><H3>
CrosshairState</H3>
<PRE>
public <A HREF="../../../../src-html/org/jfree/chart/plot/CrosshairState.html#line.87"><B>CrosshairState</B></A>()</PRE>
<DL>
<DD>Default constructor.
<P>
</DL>
<HR>

<A NAME="CrosshairState(boolean)"><!-- --></A><H3>
CrosshairState</H3>
<PRE>
public <A HREF="../../../../src-html/org/jfree/chart/plot/CrosshairState.html#line.98"><B>CrosshairState</B></A>(boolean&nbsp;calculateDistanceInDataSpace)</PRE>
<DL>
<DD>Creates a new info object.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>calculateDistanceInDataSpace</CODE> - a flag that controls whether the 
                                      distance is calculated in data 
                                      space or Java2D space.</DL>
</DL>

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<A NAME="setCrosshairDistance(double)"><!-- --></A><H3>
setCrosshairDistance</H3>
<PRE>
public void <A HREF="../../../../src-html/org/jfree/chart/plot/CrosshairState.html#line.110"><B>setCrosshairDistance</B></A>(double&nbsp;distance)</PRE>
<DL>
<DD>Sets the distance between the anchor point and the current crosshair 
 point.  As each data point is processed, its distance to the anchor 
 point is compared with this value and, if it is closer, the data point 
 becomes the new crosshair point.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>distance</CODE> - the distance.</DL>
</DD>
</DL>
<HR>

<A NAME="updateCrosshairPoint(double, double, double, double, org.jfree.chart.plot.PlotOrientation)"><!-- --></A><H3>
updateCrosshairPoint</H3>
<PRE>
public void <A HREF="../../../../src-html/org/jfree/chart/plot/CrosshairState.html#line.130"><B>updateCrosshairPoint</B></A>(double&nbsp;x,
                                 double&nbsp;y,
                                 double&nbsp;transX,
                                 double&nbsp;transY,
                                 <A HREF="../../../../org/jfree/chart/plot/PlotOrientation.html" title="class in org.jfree.chart.plot">PlotOrientation</A>&nbsp;orientation)</PRE>
<DL>
<DD>Evaluates a data point and if it is the closest to the anchor point it
 becomes the new crosshair point.
 <P>
 To understand this method, you need to know the context in which it will
 be called.  An instance of this class is passed to an 
 <A HREF="../../../../org/jfree/chart/renderer/xy/XYItemRenderer.html" title="interface in org.jfree.chart.renderer.xy"><CODE>XYItemRenderer</CODE></A> as
 each data point is plotted.  As the point is plotted, it is passed to
 this method to see if it should be the new crosshair point.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>x</CODE> - x coordinate (measured against the domain axis).<DD><CODE>y</CODE> - y coordinate (measured against the range axis).<DD><CODE>transX</CODE> - x translated into Java2D space.<DD><CODE>transY</CODE> - y translated into Java2D space.<DD><CODE>orientation</CODE> - the plot orientation.</DL>
</DD>
</DL>
<HR>

<A NAME="updateCrosshairX(double)"><!-- --></A><H3>
updateCrosshairX</H3>
<PRE>
public void <A HREF="../../../../src-html/org/jfree/chart/plot/CrosshairState.html#line.170"><B>updateCrosshairX</B></A>(double&nbsp;candidateX)</PRE>
<DL>
<DD>Evaluates an x-value and if it is the closest to the anchor point it
 becomes the new crosshair point.
 <P>
 Used in cases where only the x-axis is numerical.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>candidateX</CODE> - x position of the candidate for the new crosshair 
                    point.</DL>
</DD>
</DL>
<HR>

<A NAME="updateCrosshairY(double)"><!-- --></A><H3>
updateCrosshairY</H3>
<PRE>
public void <A HREF="../../../../src-html/org/jfree/chart/plot/CrosshairState.html#line.189"><B>updateCrosshairY</B></A>(double&nbsp;candidateY)</PRE>
<DL>
<DD>Evaluates a y-value and if it is the closest to the anchor point it
 becomes the new crosshair point.
 <P>
 Used in cases where only the y-axis is numerical.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>candidateY</CODE> - y position of the candidate for the new crosshair 
                    point.</DL>
</DD>
</DL>
<HR>

<A NAME="setAnchor(java.awt.geom.Point2D)"><!-- --></A><H3>
setAnchor</H3>
<PRE>
public void <A HREF="../../../../src-html/org/jfree/chart/plot/CrosshairState.html#line.206"><B>setAnchor</B></A>(java.awt.geom.Point2D&nbsp;anchor)</PRE>
<DL>
<DD>Sets the anchor point.  This is usually the mouse click point in a chart
 panel, and the crosshair point will often be the data item that is 
 closest to the anchor point.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>anchor</CODE> - the anchor point.</DL>
</DD>
</DL>
<HR>

<A NAME="getCrosshairX()"><!-- --></A><H3>
getCrosshairX</H3>
<PRE>
public double <A HREF="../../../../src-html/org/jfree/chart/plot/CrosshairState.html#line.215"><B>getCrosshairX</B></A>()</PRE>
<DL>
<DD>Get the x-value for the crosshair point.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>The x position of the crosshair point.</DL>
</DD>
</DL>
<HR>

<A NAME="setCrosshairX(double)"><!-- --></A><H3>
setCrosshairX</H3>
<PRE>
public void <A HREF="../../../../src-html/org/jfree/chart/plot/CrosshairState.html#line.225"><B>setCrosshairX</B></A>(double&nbsp;x)</PRE>
<DL>
<DD>Sets the x coordinate for the crosshair.  This is the coordinate in data
 space measured against the domain axis.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>x</CODE> - the coordinate.</DL>
</DD>
</DL>
<HR>

<A NAME="getCrosshairY()"><!-- --></A><H3>
getCrosshairY</H3>
<PRE>
public double <A HREF="../../../../src-html/org/jfree/chart/plot/CrosshairState.html#line.235"><B>getCrosshairY</B></A>()</PRE>
<DL>
<DD>Get the y-value for the crosshair point.  This is the coordinate in data
 space measured against the range axis.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>The y position of the crosshair point.</DL>
</DD>
</DL>
<HR>

<A NAME="setCrosshairY(double)"><!-- --></A><H3>
setCrosshairY</H3>
<PRE>
public void <A HREF="../../../../src-html/org/jfree/chart/plot/CrosshairState.html#line.244"><B>setCrosshairY</B></A>(double&nbsp;y)</PRE>
<DL>
<DD>Sets the y coordinate for the crosshair.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>y</CODE> - the y coordinate.</DL>
</DD>
</DL>
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