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<a href="#currentcolormapchanged" class="md-nav__link">
<span class="md-ellipsis">
currentColormapChanged
</span>
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</ul>
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Methods
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<a href="#superqt.QColormapComboBox.addColormap" class="md-nav__link">
<span class="md-ellipsis">
addColormap
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<a href="#superqt.QColormapComboBox.addColormaps" class="md-nav__link">
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addColormaps
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currentColormap
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isFilterable
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<a href="#superqt.QColormapComboBox.itemColormap" class="md-nav__link">
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itemColormap
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setCurrentColormap
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setUserAdditionsAllowed
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<h1 id="qcolormapcombobox">QColormapComboBox<a class="headerlink" href="#qcolormapcombobox" title="Permanent link">#</a></h1>
<p><code>QComboBox</code> variant to select from a specific set of colormaps.</p>
<div class="admonition note">
<p class="admonition-title">requires cmap</p>
<p>This widget uses the <a href="https://cmap-docs.readthedocs.io/">cmap</a> library
to provide colormaps. You can install it with:</p>
<div class="highlight"><pre><span></span><code><span class="c1"># use the `cmap` extra to include colormap support</span>
pip<span class="w"> </span>install<span class="w"> </span>superqt<span class="o">[</span>cmap<span class="o">]</span>
</code></pre></div>
</div>
<h3 id="colormaplike-objects">ColorMapLike objects<a class="headerlink" href="#colormaplike-objects" title="Permanent link">#</a></h3>
<p>Colormaps may be specified in a variety of ways, such as by name (string), an iterable of a color/color-like objects, or as
a <a class="autorefs autorefs-external" href="https://cmap-docs.readthedocs.io/en/latest/reference/cmap/#cmap.Colormap"><code>cmap.Colormap</code></a> instance. See <a href="https://cmap-docs.readthedocs.io/en/latest/colormaps/#colormaplike-objects">cmap documentation for details on
all ColormapLike types</a></p>
<h3 id="example">Example<a class="headerlink" href="#example" title="Permanent link">#</a></h3>
<div class="highlight"><pre><span></span><code><span class="kn">from</span> <span class="nn">cmap</span> <span class="kn">import</span> <span class="n">Colormap</span>
<span class="kn">from</span> <span class="nn">qtpy.QtWidgets</span> <span class="kn">import</span> <span class="n">QApplication</span>
<span class="kn">from</span> <span class="nn">superqt</span> <span class="kn">import</span> <span class="n">QColormapComboBox</span>
<span class="n">app</span> <span class="o">=</span> <span class="n">QApplication</span><span class="p">([])</span>
<span class="n">cmap_combo</span> <span class="o">=</span> <span class="n">QColormapComboBox</span><span class="p">()</span>
<span class="c1"># see note above about colormap-like objects</span>
<span class="c1"># as names from the cmap catalog</span>
<span class="n">cmap_combo</span><span class="o">.</span><span class="n">addColormaps</span><span class="p">([</span><span class="s2">&quot;viridis&quot;</span><span class="p">,</span> <span class="s2">&quot;plasma&quot;</span><span class="p">,</span> <span class="s2">&quot;magma&quot;</span><span class="p">,</span> <span class="s2">&quot;gray&quot;</span><span class="p">])</span>
<span class="c1"># as a sequence of colors, linearly interpolated</span>
<span class="n">cmap_combo</span><span class="o">.</span><span class="n">addColormap</span><span class="p">((</span><span class="s2">&quot;#0f0&quot;</span><span class="p">,</span> <span class="s2">&quot;slateblue&quot;</span><span class="p">,</span> <span class="s2">&quot;#F3A003A0&quot;</span><span class="p">))</span>
<span class="c1"># as a `cmap.Colormap` instance with custom name:</span>
<span class="n">cmap_combo</span><span class="o">.</span><span class="n">addColormap</span><span class="p">(</span><span class="n">Colormap</span><span class="p">((</span><span class="s2">&quot;green&quot;</span><span class="p">,</span> <span class="s2">&quot;white&quot;</span><span class="p">,</span> <span class="s2">&quot;orange&quot;</span><span class="p">),</span> <span class="n">name</span><span class="o">=</span><span class="s2">&quot;MyMap&quot;</span><span class="p">))</span>
<span class="n">cmap_combo</span><span class="o">.</span><span class="n">show</span><span class="p">()</span>
<span class="n">app</span><span class="o">.</span><span class="n">exec</span><span class="p">()</span>
</code></pre></div>
<p><img alt="QColormapComboBox" loading="lazy;" src="../../_auto_images/QColormapComboBox.png" width="200" /></p>
<h3 id="style-customization">Style Customization<a class="headerlink" href="#style-customization" title="Permanent link">#</a></h3>
<p>Note that both the LineEdit and the dropdown can be styled to have the colormap
on the left, or fill the entire width of the widget.</p>
<p>To make the CombBox label colormap fill the entire width of the widget:</p>
<div class="highlight"><pre><span></span><code><span class="kn">from</span> <span class="nn">superqt.cmap</span> <span class="kn">import</span> <span class="n">QColormapLineEdit</span>
<span class="n">cmap_combo</span><span class="o">.</span><span class="n">setLineEdit</span><span class="p">(</span><span class="n">QColormapLineEdit</span><span class="p">())</span>
</code></pre></div>
<p>To make the CombBox dropdown colormaps fill
less than the entire width of the widget:</p>
<div class="highlight"><pre><span></span><code><span class="kn">from</span> <span class="nn">superqt.cmap</span> <span class="kn">import</span> <span class="n">QColormapItemDelegate</span>
<span class="n">delegate</span> <span class="o">=</span> <span class="n">QColormapItemDelegate</span><span class="p">(</span><span class="n">fractional_colormap_width</span><span class="o">=</span><span class="mf">0.33</span><span class="p">)</span>
<span class="n">cmap_combo</span><span class="o">.</span><span class="n">setItemDelegate</span><span class="p">(</span><span class="n">delegate</span><span class="p">)</span>
</code></pre></div>
<h2 id="qt-class">Qt Class<a class="headerlink" href="#qt-class" title="Permanent link">#</a></h2>
<p><a href='https://doc.qt.io/qt-6/qcombobox.html'><code>QComboBox</code></a></p>
<h2 id="signals">Signals<a class="headerlink" href="#signals" title="Permanent link">#</a></h2>
<h3 id="currentcolormapchanged"><code>currentColormapChanged</code><a class="headerlink" href="#currentcolormapchanged" title="Permanent link">#</a></h3>
<h2 id="methods">Methods<a class="headerlink" href="#methods" title="Permanent link">#</a></h2>
<div class="doc doc-object doc-class">
<div class="doc doc-contents first">
<p>A drop down menu for selecting colors.</p>
<p><span class="doc-section-title">Parameters:</span></p>
<table>
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Description</th>
<th>Default</th>
</tr>
</thead>
<tbody>
<tr class="doc-section-item">
<td>
<code>parent</code>
</td>
<td>
<code><span title="qtpy.QtWidgets.QWidget">QWidget</span></code>
</td>
<td>
<div class="doc-md-description">
<p>The parent widget.</p>
</div>
</td>
<td>
<code>None</code>
</td>
</tr>
<tr class="doc-section-item">
<td>
<code>allow_user_colormaps</code>
</td>
<td>
<code><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#bool">bool</a></code>
</td>
<td>
<div class="doc-md-description">
<p>Whether the user can add custom colormaps by clicking the "Add
Colormap..." item. Default is False. Can also be set with
<code>setUserAdditionsAllowed</code>.</p>
</div>
</td>
<td>
<code>False</code>
</td>
</tr>
<tr class="doc-section-item">
<td>
<code>add_colormap_text</code>
</td>
<td>
<code><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/stdtypes.html#str">str</a></code>
</td>
<td>
<div class="doc-md-description">
<p>The text to display for the "Add Colormap..." item.
Default is "Add Colormap...".</p>
</div>
</td>
<td>
<code>&#39;Add Colormap...&#39;</code>
</td>
</tr>
<tr class="doc-section-item">
<td>
<code>filterable</code>
</td>
<td>
<code><a class="autorefs autorefs-external" href="https://docs.python.org/3/library/functions.html#bool">bool</a></code>
</td>
<td>
<div class="doc-md-description">
<p>Whether the user can filter colormaps by typing in the line edit.
Default is True. Can also be set with <code>setFilterable</code>.</p>
</div>
</td>
<td>
<code>True</code>
</td>
</tr>
</tbody>
</table>
<div class="doc doc-children">
<div class="doc doc-object doc-function">
<h3 id="superqt.QColormapComboBox.addColormap" class="doc doc-heading">
<code class="highlight language-python"><span class="n">addColormap</span><span class="p">(</span><span class="n">cmap</span><span class="p">:</span> <span class="n">ColorStopsLike</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kc">None</span></code>
<a href="#superqt.QColormapComboBox.addColormap" class="headerlink" title="Permanent link">#</a></h3>
<div class="doc doc-contents ">
<p>Adds the colormap to the QComboBox.</p>
</div>
</div>
<div class="doc doc-object doc-function">
<h3 id="superqt.QColormapComboBox.addColormaps" class="doc doc-heading">
<code class="highlight language-python"><span class="n">addColormaps</span><span class="p">(</span><span class="n">colors</span><span class="p">:</span> <span class="n">Sequence</span><span class="p">[</span><span class="n">Any</span><span class="p">])</span> <span class="o">-&gt;</span> <span class="kc">None</span></code>
<a href="#superqt.QColormapComboBox.addColormaps" class="headerlink" title="Permanent link">#</a></h3>
<div class="doc doc-contents ">
<p>Adds colors to the QComboBox.</p>
</div>
</div>
<div class="doc doc-object doc-function">
<h3 id="superqt.QColormapComboBox.currentColormap" class="doc doc-heading">
<code class="highlight language-python"><span class="n">currentColormap</span><span class="p">()</span> <span class="o">-&gt;</span> <span class="n">Colormap</span> <span class="o">|</span> <span class="kc">None</span></code>
<a href="#superqt.QColormapComboBox.currentColormap" class="headerlink" title="Permanent link">#</a></h3>
<div class="doc doc-contents ">
<p>Returns the currently selected Colormap or None if not yet selected.</p>
</div>
</div>
<div class="doc doc-object doc-function">
<h3 id="superqt.QColormapComboBox.isFilterable" class="doc doc-heading">
<code class="highlight language-python"><span class="n">isFilterable</span><span class="p">()</span> <span class="o">-&gt;</span> <span class="nb">bool</span></code>
<a href="#superqt.QColormapComboBox.isFilterable" class="headerlink" title="Permanent link">#</a></h3>
<div class="doc doc-contents ">
<p>Returns whether the user can filter the list of colormaps.</p>
</div>
</div>
<div class="doc doc-object doc-function">
<h3 id="superqt.QColormapComboBox.itemColormap" class="doc doc-heading">
<code class="highlight language-python"><span class="n">itemColormap</span><span class="p">(</span><span class="n">index</span><span class="p">:</span> <span class="nb">int</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">Colormap</span> <span class="o">|</span> <span class="kc">None</span></code>
<a href="#superqt.QColormapComboBox.itemColormap" class="headerlink" title="Permanent link">#</a></h3>
<div class="doc doc-contents ">
<p>Returns the color of the item at the given index.</p>
</div>
</div>
<div class="doc doc-object doc-function">
<h3 id="superqt.QColormapComboBox.setCurrentColormap" class="doc doc-heading">
<code class="highlight language-python"><span class="n">setCurrentColormap</span><span class="p">(</span><span class="n">color</span><span class="p">:</span> <span class="n">Any</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kc">None</span></code>
<a href="#superqt.QColormapComboBox.setCurrentColormap" class="headerlink" title="Permanent link">#</a></h3>
<div class="doc doc-contents ">
<p>Adds the color to the QComboBox and selects it.</p>
</div>
</div>
<div class="doc doc-object doc-function">
<h3 id="superqt.QColormapComboBox.setFilterable" class="doc doc-heading">
<code class="highlight language-python"><span class="n">setFilterable</span><span class="p">(</span><span class="n">filterable</span><span class="p">:</span> <span class="nb">bool</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kc">None</span></code>
<a href="#superqt.QColormapComboBox.setFilterable" class="headerlink" title="Permanent link">#</a></h3>
<div class="doc doc-contents ">
<p>Set whether the user can enter/filter colormaps by typing in the line edit.</p>
<p>If enabled, the user can select the text in the line edit and type to
filter the list of colormaps. The completer will show a list of matching
colormaps as the user types. If disabled, the user can only select from
the combo box dropdown.</p>
</div>
</div>
<div class="doc doc-object doc-function">
<h3 id="superqt.QColormapComboBox.setUserAdditionsAllowed" class="doc doc-heading">
<code class="highlight language-python"><span class="n">setUserAdditionsAllowed</span><span class="p">(</span><span class="n">allow</span><span class="p">:</span> <span class="nb">bool</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kc">None</span></code>
<a href="#superqt.QColormapComboBox.setUserAdditionsAllowed" class="headerlink" title="Permanent link">#</a></h3>
<div class="doc doc-contents ">
<p>Sets whether the user can add custom colors.</p>
<p>If enabled, an "Add Colormap..." item will be added to the end of the
list. When clicked, a dialog will be shown to allow the user to select
a colormap from the
<a href="https://cmap-docs.readthedocs.io/en/latest/catalog/">cmap catalog</a>.</p>
</div>
</div>
<div class="doc doc-object doc-function">
<h3 id="superqt.QColormapComboBox.userAdditionsAllowed" class="doc doc-heading">
<code class="highlight language-python"><span class="n">userAdditionsAllowed</span><span class="p">()</span> <span class="o">-&gt;</span> <span class="nb">bool</span></code>
<a href="#superqt.QColormapComboBox.userAdditionsAllowed" class="headerlink" title="Permanent link">#</a></h3>
<div class="doc doc-contents ">
<p>Returns whether the user can add custom colors.</p>
</div>
</div>
</div>
</div>
</div>
</article>
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