22 lines
2.8 KiB
HTML
22 lines
2.8 KiB
HTML
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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Getting the grid lines right</title><link rel="stylesheet" type="text/css" href="manual.css"><meta name="generator" content="DocBook XSL Stylesheets V1.76.0"><link rel="home" href="index.html" title="JpGraph Manual"><link rel="up" href="ch35s03.html" title="The Init() method"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Getting the grid lines right</th></tr><tr><td width="20%" align="left"> </td><th width="60%" align="center">The Init() method</th><td width="20%" align="right"> </td></tr></table><hr></div><div class="section" title="Getting the grid lines right"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2622113"></a>Getting the grid lines right</h2></div></div></div>
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<p>Since we want some discrete horizontal grid lines we might think that it is
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enough to do the normal</p>
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<p>
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</p><div class="hl-main"><table class="hl-table" width="100%"><tr><td class="hl-gutter" align="right" valign="top"><pre>1
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</pre></td><td class="hl-main" valign="top"><pre><span class="hl-code">$graph->ygrid->Show();</span></pre></td></tr></table></div><p>
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</p>
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<p>However, doing that will not show any grid lines. The reason is hat by default
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the grid lines are drawn at the bottom of the plot. Since we have filled area
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plots covering 100% of the pot area no grid lines would show. In order to change
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this we need to move the grid line to the front with a call to the method</p>
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<p>
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</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
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<p><code class="code">Graph::SetGridDepth($aDepth)</code></p>
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</li></ul></div><p>
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</p>
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<p>using the argument <code class="code">DEPTH_FRONT</code>. The rest of the grid line
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formatting is just basic style and color modification to make the grid visible
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but just barely.</p>
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