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<H3><A NAME="9_12_4">9.12.4 Horizontal grids and alternating line colors</A>
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</H3>
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<P> In order to make large charts easier to read it is possible to
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specify alternating an horizontal grid and optional alternating line
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colors in the background for Gantt charts. The horizontal grid is
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accessed through the<I> Graph::hgrid</I> property and the line (used in
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the grid) is accessed through the<I> Graph::hgrid::line</I>
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sub-property</P>
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<P> In order to specify the alternating line colors the<I>
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SetRowFillColor()</I> method is used. For example, to use alternating
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blue background with blue grid line the following lines would have to
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be added to the graph script<DIV class="phpscript"><CODE><FONT color="#000000">
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<FONT color="#0000BB"> </FONT><FONT color="#FF8000">
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// Setup a horizontal grid
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<BR></FONT><FONT color="#0000BB">$graph</FONT><FONT color="#007700">-></FONT><FONT
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color="#0000BB">hgrid</FONT><FONT color="#007700">-></FONT><FONT color="#0000BB">
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Show</FONT><FONT color="#007700">();
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<BR></FONT><FONT color="#0000BB">$graph</FONT><FONT color="#007700">-></FONT><FONT
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color="#0000BB">hgrid</FONT><FONT color="#007700">-></FONT><FONT color="#0000BB">
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line</FONT><FONT color="#007700">-></FONT><FONT color="#0000BB">SetColor</FONT><FONT
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color="#007700">(</FONT><FONT color="#DD0000">'lightblue'</FONT><FONT color="#007700">
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);
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<BR></FONT><FONT color="#0000BB">$graph</FONT><FONT color="#007700">-></FONT><FONT
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color="#0000BB">hgrid</FONT><FONT color="#007700">-></FONT><FONT color="#0000BB">
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SetRowFillColor</FONT><FONT color="#007700">(</FONT><FONT color="#DD0000">
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'darkblue@0.9'</FONT><FONT color="#007700">);</FONT><FONT color="#0000BB">
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</FONT></FONT></CODE></DIV></P>
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<P> Below is an example of a Gantt graph using this formatting<DIV class="example">
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<BR> <A href="exframes/frame_gantthgridex1.html" target="blank"><IMG border="0"
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HEIGHT="253" src="img/img/img/img/img/img/gantthgridex1.png" WIDTH="500"></A>
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<BR><B>Figure 169:</B> Adding a horizontal grid to the graph <A href="exframes/frame_gantthgridex1.html"
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target="blank">[src]</A>
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