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<article class="content wrap" id="_content" data-uid="Lucene.Net.Search.Highlight.GradientFormatter">
<h1 id="Lucene_Net_Search_Highlight_GradientFormatter" data-uid="Lucene.Net.Search.Highlight.GradientFormatter" class="text-break">Class GradientFormatter
</h1>
<div class="markdown level0 summary"><p>Formats text with different color intensity depending on the score of the term.</p>
</div>
<div class="markdown level0 conceptual"></div>
<div class="inheritance">
<h5>Inheritance</h5>
<div class="level0"><span class="xref">System.Object</span></div>
<div class="level1"><span class="xref">GradientFormatter</span></div>
<div class="level2"><a class="xref" href="Lucene.Net.Search.Highlight.SpanGradientFormatter.html">SpanGradientFormatter</a></div>
</div>
<div classs="implements">
<h5>Implements</h5>
<div><a class="xref" href="Lucene.Net.Search.Highlight.IFormatter.html">IFormatter</a></div>
</div>
<div class="inheritedMembers">
<h5>Inherited Members</h5>
<div>
<span class="xref">System.Object.Equals(System.Object)</span>
</div>
<div>
<span class="xref">System.Object.Equals(System.Object, System.Object)</span>
</div>
<div>
<span class="xref">System.Object.GetHashCode()</span>
</div>
<div>
<span class="xref">System.Object.GetType()</span>
</div>
<div>
<span class="xref">System.Object.MemberwiseClone()</span>
</div>
<div>
<span class="xref">System.Object.ReferenceEquals(System.Object, System.Object)</span>
</div>
<div>
<span class="xref">System.Object.ToString()</span>
</div>
</div>
<h6><strong>Namespace</strong>: <a class="xref" href="Lucene.Net.Search.Highlight.html">Lucene.Net.Search.Highlight</a></h6>
<h6><strong>Assembly</strong>: Lucene.Net.Highlighter.dll</h6>
<h5 id="Lucene_Net_Search_Highlight_GradientFormatter_syntax">Syntax</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public class GradientFormatter : IFormatter</code></pre>
</div>
<h3 id="constructors">Constructors
</h3>
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<a id="Lucene_Net_Search_Highlight_GradientFormatter__ctor_" data-uid="Lucene.Net.Search.Highlight.GradientFormatter.#ctor*"></a>
<h4 id="Lucene_Net_Search_Highlight_GradientFormatter__ctor_System_Single_System_String_System_String_System_String_System_String_" data-uid="Lucene.Net.Search.Highlight.GradientFormatter.#ctor(System.Single,System.String,System.String,System.String,System.String)">GradientFormatter(Single, String, String, String, String)</h4>
<div class="markdown level1 summary"><p>Sets the color range for the IDF scores</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public GradientFormatter(float maxScore, string minForegroundColor, string maxForegroundColor, string minBackgroundColor, string maxBackgroundColor)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Single</span></td>
<td><span class="parametername">maxScore</span></td>
<td><p>The score (and above) displayed as maxColor (See <a class="xref" href="Lucene.Net.Search.Highlight.QueryScorer.html#Lucene_Net_Search_Highlight_QueryScorer_MaxTermWeight">MaxTermWeight</a>
which can be used to callibrate scoring scale)</p>
</td>
</tr>
<tr>
<td><span class="xref">System.String</span></td>
<td><span class="parametername">minForegroundColor</span></td>
<td><p>The hex color used for representing IDF scores of zero eg</p>
<h1 id="ffffff-white-or-null-if-no-foreground-color-required">FFFFFF (white) or null if no foreground color required</h1>
</td>
</tr>
<tr>
<td><span class="xref">System.String</span></td>
<td><span class="parametername">maxForegroundColor</span></td>
<td><p>The largest hex color used for representing IDF scores eg</p>
<h1 id="000000-black-or-null-if-no-foreground-color-required">000000 (black) or null if no foreground color required</h1>
</td>
</tr>
<tr>
<td><span class="xref">System.String</span></td>
<td><span class="parametername">minBackgroundColor</span></td>
<td><p>The hex color used for representing IDF scores of zero eg</p>
<h1 id="ffffff-white-or-null-if-no-background-color-required">FFFFFF (white) or null if no background color required</h1>
</td>
</tr>
<tr>
<td><span class="xref">System.String</span></td>
<td><span class="parametername">maxBackgroundColor</span></td>
<td><p>The largest hex color used for representing IDF scores eg</p>
<h1 id="000000-black-or-null-if-no-background-color-required">000000 (black) or null if no background color required</h1>
</td>
</tr>
</tbody>
</table>
<h3 id="fields">Fields
</h3>
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<pre><code class="lang-csharp hljs">protected int m_bgBMax</code></pre>
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<h5 class="fieldValue">Field Value</h5>
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<th>Type</th>
<th>Description</th>
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<td><span class="xref">System.Int32</span></td>
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<pre><code class="lang-csharp hljs">protected int m_bgBMin</code></pre>
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<h5 class="fieldValue">Field Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
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<td><span class="xref">System.Int32</span></td>
<td></td>
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<pre><code class="lang-csharp hljs">protected int m_bgGMax</code></pre>
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<h5 class="fieldValue">Field Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
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<td><span class="xref">System.Int32</span></td>
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<pre><code class="lang-csharp hljs">protected int m_bgGMin</code></pre>
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<h5 class="fieldValue">Field Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
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<td><span class="xref">System.Int32</span></td>
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<th>Type</th>
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<h5 class="fieldValue">Field Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
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<td><span class="xref">System.Int32</span></td>
<td></td>
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<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
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<td><span class="xref">System.Int32</span></td>
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<table class="table table-bordered table-striped table-condensed">
<thead>
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<th>Type</th>
<th>Description</th>
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<td><span class="xref">System.Int32</span></td>
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<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected int m_fgGMax</code></pre>
</div>
<h5 class="fieldValue">Field Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Int32</span></td>
<td></td>
</tr>
</tbody>
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<h4 id="Lucene_Net_Search_Highlight_GradientFormatter_m_fgGMin" data-uid="Lucene.Net.Search.Highlight.GradientFormatter.m_fgGMin">m_fgGMin</h4>
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<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected int m_fgGMin</code></pre>
</div>
<h5 class="fieldValue">Field Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Int32</span></td>
<td></td>
</tr>
</tbody>
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<h4 id="Lucene_Net_Search_Highlight_GradientFormatter_m_fgRMax" data-uid="Lucene.Net.Search.Highlight.GradientFormatter.m_fgRMax">m_fgRMax</h4>
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<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected int m_fgRMax</code></pre>
</div>
<h5 class="fieldValue">Field Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Int32</span></td>
<td></td>
</tr>
</tbody>
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<h4 id="Lucene_Net_Search_Highlight_GradientFormatter_m_fgRMin" data-uid="Lucene.Net.Search.Highlight.GradientFormatter.m_fgRMin">m_fgRMin</h4>
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<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected int m_fgRMin</code></pre>
</div>
<h5 class="fieldValue">Field Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Int32</span></td>
<td></td>
</tr>
</tbody>
</table>
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<h4 id="Lucene_Net_Search_Highlight_GradientFormatter_m_highlightBackground" data-uid="Lucene.Net.Search.Highlight.GradientFormatter.m_highlightBackground">m_highlightBackground</h4>
<div class="markdown level1 summary"></div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected bool m_highlightBackground</code></pre>
</div>
<h5 class="fieldValue">Field Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Boolean</span></td>
<td></td>
</tr>
</tbody>
</table>
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<h4 id="Lucene_Net_Search_Highlight_GradientFormatter_m_highlightForeground" data-uid="Lucene.Net.Search.Highlight.GradientFormatter.m_highlightForeground">m_highlightForeground</h4>
<div class="markdown level1 summary"></div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected bool m_highlightForeground</code></pre>
</div>
<h5 class="fieldValue">Field Value</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Boolean</span></td>
<td></td>
</tr>
</tbody>
</table>
<h3 id="methods">Methods
</h3>
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<a id="Lucene_Net_Search_Highlight_GradientFormatter_GetBackgroundColorString_" data-uid="Lucene.Net.Search.Highlight.GradientFormatter.GetBackgroundColorString*"></a>
<h4 id="Lucene_Net_Search_Highlight_GradientFormatter_GetBackgroundColorString_System_Single_" data-uid="Lucene.Net.Search.Highlight.GradientFormatter.GetBackgroundColorString(System.Single)">GetBackgroundColorString(Single)</h4>
<div class="markdown level1 summary"></div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected virtual string GetBackgroundColorString(float score)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Single</span></td>
<td><span class="parametername">score</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.String</span></td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Search_Highlight_GradientFormatter_GetForegroundColorString_" data-uid="Lucene.Net.Search.Highlight.GradientFormatter.GetForegroundColorString*"></a>
<h4 id="Lucene_Net_Search_Highlight_GradientFormatter_GetForegroundColorString_System_Single_" data-uid="Lucene.Net.Search.Highlight.GradientFormatter.GetForegroundColorString(System.Single)">GetForegroundColorString(Single)</h4>
<div class="markdown level1 summary"></div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">protected virtual string GetForegroundColorString(float score)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Single</span></td>
<td><span class="parametername">score</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.String</span></td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Search_Highlight_GradientFormatter_HexToInt32_" data-uid="Lucene.Net.Search.Highlight.GradientFormatter.HexToInt32*"></a>
<h4 id="Lucene_Net_Search_Highlight_GradientFormatter_HexToInt32_System_String_" data-uid="Lucene.Net.Search.Highlight.GradientFormatter.HexToInt32(System.String)">HexToInt32(String)</h4>
<div class="markdown level1 summary"><p>Converts a hex string into an <span class="xref">System.Int32</span>.
<p>
NOTE: This was hexToInt() in Lucene</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static int HexToInt32(string hex)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.String</span></td>
<td><span class="parametername">hex</span></td>
<td><p>A string in capital or lower case hex, of no more then 16
characters.</p>
</td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.Int32</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="exceptions">Exceptions</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Condition</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.FormatException</span></td>
<td><p>if the string is more than 16 characters long, or if any
character is not in the set [0-9a-fA-f]</p>
</td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Search_Highlight_GradientFormatter_HighlightTerm_" data-uid="Lucene.Net.Search.Highlight.GradientFormatter.HighlightTerm*"></a>
<h4 id="Lucene_Net_Search_Highlight_GradientFormatter_HighlightTerm_System_String_Lucene_Net_Search_Highlight_TokenGroup_" data-uid="Lucene.Net.Search.Highlight.GradientFormatter.HighlightTerm(System.String,Lucene.Net.Search.Highlight.TokenGroup)">HighlightTerm(String, TokenGroup)</h4>
<div class="markdown level1 summary"></div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public virtual string HighlightTerm(string originalText, TokenGroup tokenGroup)</code></pre>
</div>
<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.String</span></td>
<td><span class="parametername">originalText</span></td>
<td></td>
</tr>
<tr>
<td><a class="xref" href="Lucene.Net.Search.Highlight.TokenGroup.html">TokenGroup</a></td>
<td><span class="parametername">tokenGroup</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.String</span></td>
<td></td>
</tr>
</tbody>
</table>
<h3 id="implements">Implements</h3>
<div>
<a class="xref" href="Lucene.Net.Search.Highlight.IFormatter.html">IFormatter</a>
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