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<A HREF="toc.html">Contents</A>
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<A HREF="720Adjustingtheautoscalinglimitsgracevalue.html">Previous</A>
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<A HREF="7211Customizingthepatterns.html">Next</A>
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<HR NOSHADE>
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<H2><A NAME="7_21">7.21 Adding bands of pattern and color to graphs</A></H2>
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<P> As an additional way of emphasizing certain areas of the graph it is
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possible to add bands (either vertical or horizontal) to any one of the
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standard X-Y coordinate system based graphs. A band is a rectangular
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area that stretches one entire axis. This means that if you define a
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band between X-coordinates 3 and 5 the band area will occupy an area
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between the X-coordinates and the entire Y-range.</P>
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<P> In order to access this functionality you must first make sure that
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you include the additional library file<I> jpgraph_plotband.php</I></P>
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<P> At the time of this writing (current as of JpGraph 1.8) the table
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below illustrates the 8 basic types of patterns available. We will
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shortly show you how you can customize these patterns, To keep these
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examples clear we have only used one pattern in each figure.</P>
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<P></P>
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<TABLE style="margin-left:-4em;">
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<TR><TD><DIV class="example">
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<BR> <A href="exframes/frame_smallstaticbandsex1.html" target="blank"><IMG
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border="0" HEIGHT="150" src="img/img/img/img/img/img/smallstaticbandsex1.png" WIDTH="200"></A>
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<BR><B>Figure 103:</B> <A href="exframes/frame_smallstaticbandsex1.html" target="blank">
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[src]</A>
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<P></P>
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</DIV>
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<P></P>
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</TD><TD><DIV class="example">
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<BR> <A href="exframes/frame_smallstaticbandsex2.html" target="blank"><IMG
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border="0" HEIGHT="150" src="img/img/img/img/img/img/smallstaticbandsex2.png" WIDTH="200"></A>
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<BR><B>Figure 104:</B> <A href="exframes/frame_smallstaticbandsex2.html" target="blank">
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[src]</A>
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<P></P>
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</DIV>
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<P></P>
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</TD></TR>
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<TR><TD><DIV class="example">
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<BR> <A href="exframes/frame_smallstaticbandsex7.html" target="blank"><IMG
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border="0" HEIGHT="150" src="img/img/img/img/img/img/smallstaticbandsex7.png" WIDTH="200"></A>
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<BR><B>Figure 105:</B> <A href="exframes/frame_smallstaticbandsex7.html" target="blank">
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[src]</A>
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<P></P>
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</DIV>
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<P></P>
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</TD><TD><DIV class="example">
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<BR> <A href="exframes/frame_smallstaticbandsex6.html" target="blank"><IMG
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border="0" HEIGHT="150" src="img/img/img/img/img/img/smallstaticbandsex6.png" WIDTH="200"></A>
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<BR><B>Figure 106:</B> <A href="exframes/frame_smallstaticbandsex6.html" target="blank">
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[src]</A>
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<P></P>
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</DIV>
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<P></P>
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</TD></TR>
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<TR><TD><DIV class="example">
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<BR> <A href="exframes/frame_smallstaticbandsex9.html" target="blank"><IMG
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border="0" HEIGHT="150" src="img/img/img/img/img/img/smallstaticbandsex9.png" WIDTH="200"></A>
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<BR><B>Figure 107:</B> <A href="exframes/frame_smallstaticbandsex9.html" target="blank">
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[src]</A>
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<P></P>
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</DIV>
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<P></P>
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</TD><TD><DIV class="example">
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<BR> <A href="exframes/frame_smallstaticbandsex10.html" target="blank"><IMG
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border="0" HEIGHT="150" src="img/img/img/img/img/img/smallstaticbandsex10.png" WIDTH="200"></A>
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<BR><B>Figure 108:</B> <A href="exframes/frame_smallstaticbandsex10.html"
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target="blank">[src]</A>
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<P></P>
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</DIV>
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<P></P>
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</TD></TR>
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<TR><TD><DIV class="example">
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<BR> <A href="exframes/frame_smallstaticbandsex3.html" target="blank"><IMG
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border="0" HEIGHT="150" src="img/img/img/img/img/img/smallstaticbandsex3.png" WIDTH="200"></A>
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<BR><B>Figure 109:</B> <A href="exframes/frame_smallstaticbandsex3.html" target="blank">
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[src]</A>
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<P></P>
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</DIV>
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<P></P>
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</TD><TD><DIV class="example">
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<BR> <A href="exframes/frame_smallstaticbandsex8.html" target="blank"><IMG
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border="0" HEIGHT="150" src="img/img/img/img/img/img/smallstaticbandsex8.png" WIDTH="200"></A>
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<BR><B>Figure 110:</B> <A href="exframes/frame_smallstaticbandsex8.html" target="blank">
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[src]</A>
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<P></P>
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</DIV>
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<P></P>
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</TD></TR>
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</TABLE>
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<P> To add a one of these patterns to your graph you need to call the
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method <A href="../ref/PlotBand.html#_PLOTBAND_PLOTBAND">
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PlotBand::PlotBand()</A> The arguments is fairly easy to understand.
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The pattern you would like to use is specified by using the correct
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constant. You can see the name of the correct constants in the figures
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above. You also need to specify if the band should stretch along the
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vertical or horizontal axis as well as the min and max coordinates for
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the band. As coordinates you may also use the special values "min" and
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"max" which automatically sets the value to the minimum/maximum value
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of the scale. The specified numeric value will be automatically
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truncated to fit within the plot area.</P>
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<P> We don't discuss the other arguments further here, instead we refer
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you to the class reference.</P>
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<HR NOSHADE>
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<A HREF="toc.html">Contents</A>
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<A HREF="720Adjustingtheautoscalinglimitsgracevalue.html">Previous</A>
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<A HREF="7211Customizingthepatterns.html">Next</A>
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