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<div class="section" id="colormapwidget">
<h1>ColorMapWidget<a class="headerlink" href="#colormapwidget" title="Permalink to this headline">¶</a></h1>
<dl class="class">
<dt id="pyqtgraph.ColorMapWidget">
<em class="property">class </em><code class="descclassname">pyqtgraph.</code><code class="descname">ColorMapWidget</code><span class="sig-paren">(</span><em>parent=None</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/pyqtgraph/widgets/ColorMapWidget.html#ColorMapWidget"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#pyqtgraph.ColorMapWidget" title="Permalink to this definition">¶</a></dt>
<dd><p>This class provides a widget allowing the user to customize color mapping
for multi-column data. Given a list of field names, the user may specify
multiple criteria for assigning colors to each record in a numpy record array.
Multiple criteria are evaluated and combined into a single color for each
record by user-defined compositing methods.</p>
<p>For simpler color mapping using a single gradient editor, see
<a class="reference internal" href="gradientwidget.html#pyqtgraph.GradientWidget" title="pyqtgraph.GradientWidget"><code class="xref py py-class docutils literal"><span class="pre">GradientWidget</span></code></a></p>
<dl class="method">
<dt id="pyqtgraph.ColorMapWidget.__init__">
<code class="descname">__init__</code><span class="sig-paren">(</span><em>parent=None</em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/pyqtgraph/widgets/ColorMapWidget.html#ColorMapWidget.__init__"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#pyqtgraph.ColorMapWidget.__init__" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="pyqtgraph.widgets.ColorMapWidget.ColorMapWidget.ColorMapParameter.setFields">
<code class="descclassname">ColorMapParameter.</code><code class="descname">setFields</code><span class="sig-paren">(</span><em>fields</em><span class="sig-paren">)</span><a class="headerlink" href="#pyqtgraph.widgets.ColorMapWidget.ColorMapWidget.ColorMapParameter.setFields" title="Permalink to this definition">¶</a></dt>
<dd><p>Set the list of fields to be used by the mapper.</p>
<p>The format of <em>fields</em> is:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="p">[</span> <span class="p">(</span><span class="n">fieldName</span><span class="p">,</span> <span class="p">{</span><span class="n">options</span><span class="p">}),</span> <span class="o">...</span> <span class="p">]</span>
</pre></div>
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<table border="1" class="docutils">
<colgroup>
<col width="19%" />
<col width="81%" />
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<tr class="row-odd"><td>Field Options:</td>
<td> </td>
</tr>
<tr class="row-even"><td>mode</td>
<td>Either ‘range’ or ‘enum’ (default is range). For ‘range’,
The user may specify a gradient of colors to be applied
linearly across a specific range of values. For ‘enum’,
the user specifies a single color for each unique value
(see <em>values</em> option).</td>
</tr>
<tr class="row-odd"><td>units</td>
<td>String indicating the units of the data for this field.</td>
</tr>
<tr class="row-even"><td>values</td>
<td>List of unique values for which the user may assign a
color when mode==’enum’. Optionally may specify a dict
instead {value: name}.</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="pyqtgraph.widgets.ColorMapWidget.ColorMapWidget.ColorMapParameter.map">
<code class="descclassname">ColorMapParameter.</code><code class="descname">map</code><span class="sig-paren">(</span><em>data</em>, <em>mode='byte'</em><span class="sig-paren">)</span><a class="headerlink" href="#pyqtgraph.widgets.ColorMapWidget.ColorMapWidget.ColorMapParameter.map" title="Permalink to this definition">¶</a></dt>
<dd><p>Return an array of colors corresponding to <em>data</em>.</p>
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<tr class="row-odd"><td><strong>Arguments:</strong></td>
<td> </td>
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<tr class="row-even"><td>data</td>
<td>A numpy record array where the fields in data.dtype match those
defined by a prior call to setFields().</td>
</tr>
<tr class="row-odd"><td>mode</td>
<td>Either ‘byte’ or ‘float’. For ‘byte’, the method returns an array
of dtype ubyte with values scaled 0-255. For ‘float’, colors are
returned as 0.0-1.0 float values.</td>
</tr>
</tbody>
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