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<div id="unreleased-message"> You are reading an old version of the documentation (v3.2.1). For the latest version see <a href="https://matplotlib.org/stable/api/widgets_api.html">https://matplotlib.org/stable/api/widgets_api.html</a></div>
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<li><a class="reference internal" href="#"><code class="docutils literal notranslate"><span class="pre">matplotlib.widgets</span></code></a><ul>
<li><a class="reference internal" href="#gui-neutral-widgets">GUI neutral widgets</a></li>
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<div class="section" id="matplotlib-widgets">
<h1><code class="docutils literal notranslate"><span class="pre">matplotlib.widgets</span></code><a class="headerlink" href="#matplotlib-widgets" title="Permalink to this headline">¶</a></h1>
<div class="graphviz"><object data="../_images/inheritance-b240119cee16ee4aacb6197ec6fd82813a77a75f.svg" type="image/svg+xml" class="inheritance graphviz">
<p class="warning">Inheritance diagram of matplotlib.widgets</p></object></div>
<span class="target" id="module-matplotlib.widgets"></span><div class="section" id="gui-neutral-widgets">
<h2>GUI neutral widgets<a class="headerlink" href="#gui-neutral-widgets" title="Permalink to this headline">¶</a></h2>
<p>Widgets that are designed to work for any of the GUI backends.
All of these widgets require you to predefine a <a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.axes.Axes</span></code></a>
instance and pass that as the first parameter. Matplotlib doesn't try to
be too smart with respect to layout -- you will have to figure out how
wide and tall you want your Axes to be to accommodate your widget.</p>
<dl class="py class">
<dt id="matplotlib.widgets.AxesWidget">
<em class="property">class </em><code class="descclassname">matplotlib.widgets.</code><code class="descname">AxesWidget</code><span class="sig-paren">(</span><em><span class="n">ax</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#AxesWidget"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.AxesWidget" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#matplotlib.widgets.Widget" title="matplotlib.widgets.Widget"><code class="xref py py-class docutils literal notranslate"><span class="pre">matplotlib.widgets.Widget</span></code></a></p>
<p>Widget that is connected to a single <a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes</span></code></a>.</p>
<p>To guarantee that the widget remains responsive and not garbage-collected,
a reference to the object should be maintained by the user.</p>
<p>This is necessary because the callback registry
maintains only weak-refs to the functions, which are member
functions of the widget. If there are no references to the widget
object it may be garbage collected which will disconnect the callbacks.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Attributes:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>ax</strong><span class="classifier"><a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes</span></code></a></span></dt><dd><p>The parent axes for the widget.</p>
</dd>
<dt><strong>canvas</strong><span class="classifier"><a class="reference internal" href="backend_bases_api.html#matplotlib.backend_bases.FigureCanvasBase" title="matplotlib.backend_bases.FigureCanvasBase"><code class="xref py py-obj docutils literal notranslate"><span class="pre">FigureCanvasBase</span></code></a> subclass</span></dt><dd><p>The parent figure canvas for the widget.</p>
</dd>
<dt><code class="xref py py-obj docutils literal notranslate"><span class="pre">active</span></code><span class="classifier">bool</span></dt><dd><p>Is the widget active?</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
<dl class="py method">
<dt id="matplotlib.widgets.AxesWidget.connect_event">
<code class="descname">connect_event</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">event</span></em>, <em><span class="n">callback</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#AxesWidget.connect_event"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.AxesWidget.connect_event" title="Permalink to this definition">¶</a></dt>
<dd><p>Connect callback with an event.</p>
<p>This should be used in lieu of <code class="xref py py-obj docutils literal notranslate"><span class="pre">figure.canvas.mpl_connect</span></code> since this
function stores callback ids for later clean up.</p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.AxesWidget.disconnect_events">
<code class="descname">disconnect_events</code><span class="sig-paren">(</span><em><span class="n">self</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#AxesWidget.disconnect_events"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.AxesWidget.disconnect_events" title="Permalink to this definition">¶</a></dt>
<dd><p>Disconnect all events created by this widget.</p>
</dd></dl>
</dd></dl>
<dl class="py class">
<dt id="matplotlib.widgets.Button">
<em class="property">class </em><code class="descclassname">matplotlib.widgets.</code><code class="descname">Button</code><span class="sig-paren">(</span><em><span class="n">ax</span></em>, <em><span class="n">label</span></em>, <em><span class="n">image</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">color</span><span class="o">=</span><span class="default_value">'0.85'</span></em>, <em><span class="n">hovercolor</span><span class="o">=</span><span class="default_value">'0.95'</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#Button"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.Button" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#matplotlib.widgets.AxesWidget" title="matplotlib.widgets.AxesWidget"><code class="xref py py-class docutils literal notranslate"><span class="pre">matplotlib.widgets.AxesWidget</span></code></a></p>
<p>A GUI neutral button.</p>
<p>For the button to remain responsive you must keep a reference to it.
Call <a class="reference internal" href="#matplotlib.widgets.Button.on_clicked" title="matplotlib.widgets.Button.on_clicked"><code class="xref py py-obj docutils literal notranslate"><span class="pre">on_clicked</span></code></a> to connect to the button.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Attributes:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>ax</strong></dt><dd><p>The <a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.axes.Axes</span></code></a> the button renders into.</p>
</dd>
<dt><strong>label</strong></dt><dd><p>A <a class="reference internal" href="text_api.html#matplotlib.text.Text" title="matplotlib.text.Text"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.text.Text</span></code></a> instance.</p>
</dd>
<dt><strong>color</strong></dt><dd><p>The color of the button when not hovering.</p>
</dd>
<dt><strong>hovercolor</strong></dt><dd><p>The color of the button when hovering.</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>ax</strong><span class="classifier"><a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes</span></code></a></span></dt><dd><p>The <a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes</span></code></a> instance the button will be placed into.</p>
</dd>
<dt><strong>label</strong><span class="classifier">str</span></dt><dd><p>The button text. Accepts string.</p>
</dd>
<dt><strong>image</strong><span class="classifier">array-like or PIL image</span></dt><dd><p>The image to place in the button, if not <em>None</em>.
Supported inputs are the same as for <a class="reference internal" href="_as_gen/matplotlib.axes.Axes.imshow.html#matplotlib.axes.Axes.imshow" title="matplotlib.axes.Axes.imshow"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes.imshow</span></code></a>.</p>
</dd>
<dt><strong>color</strong><span class="classifier">color</span></dt><dd><p>The color of the button when not activated.</p>
</dd>
<dt><strong>hovercolor</strong><span class="classifier">color</span></dt><dd><p>The color of the button when the mouse is over it.</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
<dl class="py method">
<dt id="matplotlib.widgets.Button.disconnect">
<code class="descname">disconnect</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">cid</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#Button.disconnect"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.Button.disconnect" title="Permalink to this definition">¶</a></dt>
<dd><p>Remove the callback function with connection id <em>cid</em>.</p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.Button.on_clicked">
<code class="descname">on_clicked</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">func</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#Button.on_clicked"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.Button.on_clicked" title="Permalink to this definition">¶</a></dt>
<dd><p>Connect the callback function <em>func</em> to button click events.</p>
<p>Returns a connection id, which can be used to disconnect the callback.</p>
</dd></dl>
</dd></dl>
<dl class="py class">
<dt id="matplotlib.widgets.CheckButtons">
<em class="property">class </em><code class="descclassname">matplotlib.widgets.</code><code class="descname">CheckButtons</code><span class="sig-paren">(</span><em><span class="n">ax</span></em>, <em><span class="n">labels</span></em>, <em><span class="n">actives</span><span class="o">=</span><span class="default_value">None</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#CheckButtons"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.CheckButtons" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#matplotlib.widgets.AxesWidget" title="matplotlib.widgets.AxesWidget"><code class="xref py py-class docutils literal notranslate"><span class="pre">matplotlib.widgets.AxesWidget</span></code></a></p>
<p>A GUI neutral set of check buttons.</p>
<p>For the check buttons to remain responsive you must keep a
reference to this object.</p>
<p>Connect to the CheckButtons with the <a class="reference internal" href="#matplotlib.widgets.CheckButtons.on_clicked" title="matplotlib.widgets.CheckButtons.on_clicked"><code class="xref py py-meth docutils literal notranslate"><span class="pre">on_clicked()</span></code></a> method</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Attributes:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>ax</strong></dt><dd><p>The <a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.axes.Axes</span></code></a> the button are located in.</p>
</dd>
<dt><strong>labels</strong></dt><dd><p>A list of <a class="reference internal" href="text_api.html#matplotlib.text.Text" title="matplotlib.text.Text"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.text.Text</span></code></a>s.</p>
</dd>
<dt><strong>lines</strong></dt><dd><p>List of (line1, line2) tuples for the x's in the check boxes.
These lines exist for each box, but have <code class="docutils literal notranslate"><span class="pre">set_visible(False)</span></code>
when its box is not checked.</p>
</dd>
<dt><strong>rectangles</strong></dt><dd><p>A list of <a class="reference internal" href="_as_gen/matplotlib.patches.Rectangle.html#matplotlib.patches.Rectangle" title="matplotlib.patches.Rectangle"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.patches.Rectangle</span></code></a>s.</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
<p>Add check buttons to <a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.axes.Axes</span></code></a> instance <em>ax</em></p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>ax</strong><span class="classifier"><a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes</span></code></a></span></dt><dd><p>The parent axes for the widget.</p>
</dd>
<dt><strong>labels</strong><span class="classifier">list of str</span></dt><dd><p>The labels of the check buttons.</p>
</dd>
<dt><strong>actives</strong><span class="classifier">list of bool, optional</span></dt><dd><p>The initial check states of the buttons. The list must have the
same length as <em>labels</em>. If not given, all buttons are unchecked.</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
<dl class="py method">
<dt id="matplotlib.widgets.CheckButtons.disconnect">
<code class="descname">disconnect</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">cid</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#CheckButtons.disconnect"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.CheckButtons.disconnect" title="Permalink to this definition">¶</a></dt>
<dd><p>remove the observer with connection id <em>cid</em></p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.CheckButtons.get_status">
<code class="descname">get_status</code><span class="sig-paren">(</span><em><span class="n">self</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#CheckButtons.get_status"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.CheckButtons.get_status" title="Permalink to this definition">¶</a></dt>
<dd><p>Return a tuple of the status (True/False) of all of the check buttons.</p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.CheckButtons.on_clicked">
<code class="descname">on_clicked</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">func</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#CheckButtons.on_clicked"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.CheckButtons.on_clicked" title="Permalink to this definition">¶</a></dt>
<dd><p>Connect the callback function <em>func</em> to button click events.</p>
<p>Returns a connection id, which can be used to disconnect the callback.</p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.CheckButtons.set_active">
<code class="descname">set_active</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">index</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#CheckButtons.set_active"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.CheckButtons.set_active" title="Permalink to this definition">¶</a></dt>
<dd><p>Directly (de)activate a check button by index.</p>
<dl class="docutils">
<dt><em>index</em> is an index into the original label list</dt><dd>that this object was constructed with.
Raises ValueError if <em>index</em> is invalid.</dd>
</dl>
<p>Callbacks will be triggered if <code class="xref py py-attr docutils literal notranslate"><span class="pre">eventson</span></code> is True.</p>
</dd></dl>
</dd></dl>
<dl class="py class">
<dt id="matplotlib.widgets.Cursor">
<em class="property">class </em><code class="descclassname">matplotlib.widgets.</code><code class="descname">Cursor</code><span class="sig-paren">(</span><em><span class="n">ax</span></em>, <em><span class="n">horizOn</span><span class="o">=</span><span class="default_value">True</span></em>, <em><span class="n">vertOn</span><span class="o">=</span><span class="default_value">True</span></em>, <em><span class="n">useblit</span><span class="o">=</span><span class="default_value">False</span></em>, <em><span class="o">**</span><span class="n">lineprops</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#Cursor"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.Cursor" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#matplotlib.widgets.AxesWidget" title="matplotlib.widgets.AxesWidget"><code class="xref py py-class docutils literal notranslate"><span class="pre">matplotlib.widgets.AxesWidget</span></code></a></p>
<p>A crosshair cursor that spans the axes and moves with mouse cursor.</p>
<p>For the cursor to remain responsive you must keep a reference to it.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first docutils">
<dt><strong>ax</strong><span class="classifier"><a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">matplotlib.axes.Axes</span></code></a></span></dt><dd><p>The <a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes</span></code></a> to attach the cursor to.</p>
</dd>
<dt><strong>horizOn</strong><span class="classifier">bool, optional, default: True</span></dt><dd><p>Whether to draw the horizontal line.</p>
</dd>
<dt><strong>vertOn</strong><span class="classifier">bool, optional, default: True</span></dt><dd><p>Whether to draw the vertical line.</p>
</dd>
<dt><strong>useblit</strong><span class="classifier">bool, optional, default: False</span></dt><dd><p>Use blitting for faster drawing if supported by the backend.</p>
</dd>
</dl>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Other Parameters:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>**lineprops</strong></dt><dd><p><a class="reference internal" href="_as_gen/matplotlib.lines.Line2D.html#matplotlib.lines.Line2D" title="matplotlib.lines.Line2D"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Line2D</span></code></a> properties that control the appearance of the lines.
See also <a class="reference internal" href="_as_gen/matplotlib.axes.Axes.axhline.html#matplotlib.axes.Axes.axhline" title="matplotlib.axes.Axes.axhline"><code class="xref py py-obj docutils literal notranslate"><span class="pre">axhline</span></code></a>.</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
<p class="rubric">Examples</p>
<p>See <a class="reference internal" href="../gallery/widgets/cursor.html"><span class="doc">Cursor</span></a>.</p>
<dl class="py method">
<dt id="matplotlib.widgets.Cursor.clear">
<code class="descname">clear</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">event</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#Cursor.clear"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.Cursor.clear" title="Permalink to this definition">¶</a></dt>
<dd><p>Internal event handler to clear the cursor.</p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.Cursor.onmove">
<code class="descname">onmove</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">event</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#Cursor.onmove"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.Cursor.onmove" title="Permalink to this definition">¶</a></dt>
<dd><p>Internal event handler to draw the cursor when the mouse moves.</p>
</dd></dl>
</dd></dl>
<dl class="py class">
<dt id="matplotlib.widgets.EllipseSelector">
<em class="property">class </em><code class="descclassname">matplotlib.widgets.</code><code class="descname">EllipseSelector</code><span class="sig-paren">(</span><em><span class="n">ax</span></em>, <em><span class="n">onselect</span></em>, <em><span class="n">drawtype</span><span class="o">=</span><span class="default_value">'box'</span></em>, <em><span class="n">minspanx</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">minspany</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">useblit</span><span class="o">=</span><span class="default_value">False</span></em>, <em><span class="n">lineprops</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">rectprops</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">spancoords</span><span class="o">=</span><span class="default_value">'data'</span></em>, <em><span class="n">button</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">maxdist</span><span class="o">=</span><span class="default_value">10</span></em>, <em><span class="n">marker_props</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">interactive</span><span class="o">=</span><span class="default_value">False</span></em>, <em><span class="n">state_modifier_keys</span><span class="o">=</span><span class="default_value">None</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#EllipseSelector"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.EllipseSelector" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#matplotlib.widgets.RectangleSelector" title="matplotlib.widgets.RectangleSelector"><code class="xref py py-class docutils literal notranslate"><span class="pre">matplotlib.widgets.RectangleSelector</span></code></a></p>
<p>Select an elliptical region of an axes.</p>
<p>For the cursor to remain responsive you must keep a reference to it.</p>
<p>Example usage:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">numpy</span> <span class="k">as</span> <span class="nn">np</span>
<span class="kn">import</span> <span class="nn">matplotlib.pyplot</span> <span class="k">as</span> <span class="nn">plt</span>
<span class="kn">from</span> <span class="nn">matplotlib.widgets</span> <span class="kn">import</span> <span class="n">EllipseSelector</span>
<span class="k">def</span> <span class="nf">onselect</span><span class="p">(</span><span class="n">eclick</span><span class="p">,</span> <span class="n">erelease</span><span class="p">):</span>
<span class="s2">"eclick and erelease are matplotlib events at press and release."</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">'startposition: (</span><span class="si">%f</span><span class="s1">, </span><span class="si">%f</span><span class="s1">)'</span> <span class="o">%</span> <span class="p">(</span><span class="n">eclick</span><span class="o">.</span><span class="n">xdata</span><span class="p">,</span> <span class="n">eclick</span><span class="o">.</span><span class="n">ydata</span><span class="p">))</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">'endposition : (</span><span class="si">%f</span><span class="s1">, </span><span class="si">%f</span><span class="s1">)'</span> <span class="o">%</span> <span class="p">(</span><span class="n">erelease</span><span class="o">.</span><span class="n">xdata</span><span class="p">,</span> <span class="n">erelease</span><span class="o">.</span><span class="n">ydata</span><span class="p">))</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">'used button : '</span><span class="p">,</span> <span class="n">eclick</span><span class="o">.</span><span class="n">button</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">toggle_selector</span><span class="p">(</span><span class="n">event</span><span class="p">):</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">' Key pressed.'</span><span class="p">)</span>
<span class="k">if</span> <span class="n">event</span><span class="o">.</span><span class="n">key</span> <span class="ow">in</span> <span class="p">[</span><span class="s1">'Q'</span><span class="p">,</span> <span class="s1">'q'</span><span class="p">]</span> <span class="ow">and</span> <span class="n">toggle_selector</span><span class="o">.</span><span class="n">ES</span><span class="o">.</span><span class="n">active</span><span class="p">:</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">'EllipseSelector deactivated.'</span><span class="p">)</span>
<span class="n">toggle_selector</span><span class="o">.</span><span class="n">RS</span><span class="o">.</span><span class="n">set_active</span><span class="p">(</span><span class="kc">False</span><span class="p">)</span>
<span class="k">if</span> <span class="n">event</span><span class="o">.</span><span class="n">key</span> <span class="ow">in</span> <span class="p">[</span><span class="s1">'A'</span><span class="p">,</span> <span class="s1">'a'</span><span class="p">]</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">toggle_selector</span><span class="o">.</span><span class="n">ES</span><span class="o">.</span><span class="n">active</span><span class="p">:</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">'EllipseSelector activated.'</span><span class="p">)</span>
<span class="n">toggle_selector</span><span class="o">.</span><span class="n">ES</span><span class="o">.</span><span class="n">set_active</span><span class="p">(</span><span class="kc">True</span><span class="p">)</span>
<span class="n">x</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">arange</span><span class="p">(</span><span class="mf">100.</span><span class="p">)</span> <span class="o">/</span> <span class="mi">99</span>
<span class="n">y</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">sin</span><span class="p">(</span><span class="n">x</span><span class="p">)</span>
<span class="n">fig</span><span class="p">,</span> <span class="n">ax</span> <span class="o">=</span> <span class="n">plt</span><span class="o">.</span><span class="n">subplots</span><span class="p">()</span>
<span class="n">ax</span><span class="o">.</span><span class="n">plot</span><span class="p">(</span><span class="n">x</span><span class="p">,</span> <span class="n">y</span><span class="p">)</span>
<span class="n">toggle_selector</span><span class="o">.</span><span class="n">ES</span> <span class="o">=</span> <span class="n">EllipseSelector</span><span class="p">(</span><span class="n">ax</span><span class="p">,</span> <span class="n">onselect</span><span class="p">,</span> <span class="n">drawtype</span><span class="o">=</span><span class="s1">'line'</span><span class="p">)</span>
<span class="n">fig</span><span class="o">.</span><span class="n">canvas</span><span class="o">.</span><span class="n">mpl_connect</span><span class="p">(</span><span class="s1">'key_press_event'</span><span class="p">,</span> <span class="n">toggle_selector</span><span class="p">)</span>
<span class="n">plt</span><span class="o">.</span><span class="n">show</span><span class="p">()</span>
</pre></div>
</div>
<p>Create a selector in <em>ax</em>. When a selection is made, clear
the span and call onselect with:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">onselect</span><span class="p">(</span><span class="n">pos_1</span><span class="p">,</span> <span class="n">pos_2</span><span class="p">)</span>
</pre></div>
</div>
<p>and clear the drawn box/line. The <code class="docutils literal notranslate"><span class="pre">pos_1</span></code> and <code class="docutils literal notranslate"><span class="pre">pos_2</span></code> are
arrays of length 2 containing the x- and y-coordinate.</p>
<p>If <em>minspanx</em> is not <em>None</em> then events smaller than <em>minspanx</em>
in x direction are ignored (it's the same for y).</p>
<p>The rectangle is drawn with <em>rectprops</em>; default:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">rectprops</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">(</span><span class="n">facecolor</span><span class="o">=</span><span class="s1">'red'</span><span class="p">,</span> <span class="n">edgecolor</span> <span class="o">=</span> <span class="s1">'black'</span><span class="p">,</span>
<span class="n">alpha</span><span class="o">=</span><span class="mf">0.2</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
</pre></div>
</div>
<p>The line is drawn with <em>lineprops</em>; default:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">lineprops</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">(</span><span class="n">color</span><span class="o">=</span><span class="s1">'black'</span><span class="p">,</span> <span class="n">linestyle</span><span class="o">=</span><span class="s1">'-'</span><span class="p">,</span>
<span class="n">linewidth</span> <span class="o">=</span> <span class="mi">2</span><span class="p">,</span> <span class="n">alpha</span><span class="o">=</span><span class="mf">0.5</span><span class="p">)</span>
</pre></div>
</div>
<p>Use <em>drawtype</em> if you want the mouse to draw a line,
a box or nothing between click and actual position by setting</p>
<p><code class="docutils literal notranslate"><span class="pre">drawtype</span> <span class="pre">=</span> <span class="pre">'line'</span></code>, <code class="docutils literal notranslate"><span class="pre">drawtype='box'</span></code> or <code class="docutils literal notranslate"><span class="pre">drawtype</span> <span class="pre">=</span> <span class="pre">'none'</span></code>.
Drawing a line would result in a line from vertex A to vertex C in
a rectangle ABCD.</p>
<p><em>spancoords</em> is one of 'data' or 'pixels'. If 'data', <em>minspanx</em>
and <em>minspanx</em> will be interpreted in the same coordinates as
the x and y axis. If 'pixels', they are in pixels.</p>
<p><em>button</em> is a list of integers indicating which mouse buttons should
be used for rectangle selection. You can also specify a single
integer if only a single button is desired. Default is <em>None</em>,
which does not limit which button can be used.</p>
<dl class="docutils">
<dt>Note, typically:</dt><dd>1 = left mouse button
2 = center mouse button (scroll wheel)
3 = right mouse button</dd>
</dl>
<p><em>interactive</em> will draw a set of handles and allow you interact
with the widget after it is drawn.</p>
<p><em>state_modifier_keys</em> are keyboard modifiers that affect the behavior
of the widget.</p>
<p>The defaults are:
dict(move=' ', clear='escape', square='shift', center='ctrl')</p>
<p>Keyboard modifiers, which:
'move': Move the existing shape.
'clear': Clear the current shape.
'square': Makes the shape square.
'center': Make the initial point the center of the shape.
'square' and 'center' can be combined.</p>
<dl class="py method">
<dt id="matplotlib.widgets.EllipseSelector.draw_shape">
<code class="descname">draw_shape</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">extents</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#EllipseSelector.draw_shape"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.EllipseSelector.draw_shape" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
</dd></dl>
<dl class="py class">
<dt id="matplotlib.widgets.Lasso">
<em class="property">class </em><code class="descclassname">matplotlib.widgets.</code><code class="descname">Lasso</code><span class="sig-paren">(</span><em><span class="n">ax</span></em>, <em><span class="n">xy</span></em>, <em><span class="n">callback</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">useblit</span><span class="o">=</span><span class="default_value">True</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#Lasso"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.Lasso" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#matplotlib.widgets.AxesWidget" title="matplotlib.widgets.AxesWidget"><code class="xref py py-class docutils literal notranslate"><span class="pre">matplotlib.widgets.AxesWidget</span></code></a></p>
<p>Selection curve of an arbitrary shape.</p>
<p>The selected path can be used in conjunction with
<a class="reference internal" href="path_api.html#matplotlib.path.Path.contains_point" title="matplotlib.path.Path.contains_point"><code class="xref py py-obj docutils literal notranslate"><span class="pre">contains_point</span></code></a> to select data points from an image.</p>
<p>Unlike <a class="reference internal" href="#matplotlib.widgets.LassoSelector" title="matplotlib.widgets.LassoSelector"><code class="xref py py-obj docutils literal notranslate"><span class="pre">LassoSelector</span></code></a>, this must be initialized with a starting
point <code class="xref py py-obj docutils literal notranslate"><span class="pre">xy</span></code>, and the <a class="reference internal" href="#matplotlib.widgets.Lasso" title="matplotlib.widgets.Lasso"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Lasso</span></code></a> events are destroyed upon release.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>ax</strong><span class="classifier"><a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes</span></code></a></span></dt><dd><p>The parent axes for the widget.</p>
</dd>
<dt><strong>xy</strong><span class="classifier">(float, float)</span></dt><dd><p>Coordinates of the start of the lasso.</p>
</dd>
<dt><strong>callback</strong><span class="classifier">callable</span></dt><dd><p>Whenever the lasso is released, the <code class="xref py py-obj docutils literal notranslate"><span class="pre">callback</span></code> function is called and
passed the vertices of the selected path.</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
<dl class="py method">
<dt id="matplotlib.widgets.Lasso.onmove">
<code class="descname">onmove</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">event</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#Lasso.onmove"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.Lasso.onmove" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.Lasso.onrelease">
<code class="descname">onrelease</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">event</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#Lasso.onrelease"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.Lasso.onrelease" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
</dd></dl>
<dl class="py class">
<dt id="matplotlib.widgets.LassoSelector">
<em class="property">class </em><code class="descclassname">matplotlib.widgets.</code><code class="descname">LassoSelector</code><span class="sig-paren">(</span><em><span class="n">ax</span></em>, <em><span class="n">onselect</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">useblit</span><span class="o">=</span><span class="default_value">True</span></em>, <em><span class="n">lineprops</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">button</span><span class="o">=</span><span class="default_value">None</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#LassoSelector"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.LassoSelector" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <code class="xref py py-class docutils literal notranslate"><span class="pre">matplotlib.widgets._SelectorWidget</span></code></p>
<p>Selection curve of an arbitrary shape.</p>
<p>For the selector to remain responsive you must keep a reference to it.</p>
<p>The selected path can be used in conjunction with <a class="reference internal" href="path_api.html#matplotlib.path.Path.contains_point" title="matplotlib.path.Path.contains_point"><code class="xref py py-obj docutils literal notranslate"><span class="pre">contains_point</span></code></a>
to select data points from an image.</p>
<p>In contrast to <a class="reference internal" href="#matplotlib.widgets.Lasso" title="matplotlib.widgets.Lasso"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Lasso</span></code></a>, <a class="reference internal" href="#matplotlib.widgets.LassoSelector" title="matplotlib.widgets.LassoSelector"><code class="xref py py-obj docutils literal notranslate"><span class="pre">LassoSelector</span></code></a> is written with an interface
similar to <a class="reference internal" href="#matplotlib.widgets.RectangleSelector" title="matplotlib.widgets.RectangleSelector"><code class="xref py py-obj docutils literal notranslate"><span class="pre">RectangleSelector</span></code></a> and <a class="reference internal" href="#matplotlib.widgets.SpanSelector" title="matplotlib.widgets.SpanSelector"><code class="xref py py-obj docutils literal notranslate"><span class="pre">SpanSelector</span></code></a>, and will continue to
interact with the axes until disconnected.</p>
<p>Example usage:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">ax</span> <span class="o">=</span> <span class="n">subplot</span><span class="p">(</span><span class="mi">111</span><span class="p">)</span>
<span class="n">ax</span><span class="o">.</span><span class="n">plot</span><span class="p">(</span><span class="n">x</span><span class="p">,</span> <span class="n">y</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">onselect</span><span class="p">(</span><span class="n">verts</span><span class="p">):</span>
<span class="nb">print</span><span class="p">(</span><span class="n">verts</span><span class="p">)</span>
<span class="n">lasso</span> <span class="o">=</span> <span class="n">LassoSelector</span><span class="p">(</span><span class="n">ax</span><span class="p">,</span> <span class="n">onselect</span><span class="p">)</span>
</pre></div>
</div>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>ax</strong><span class="classifier"><a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes</span></code></a></span></dt><dd><p>The parent axes for the widget.</p>
</dd>
<dt><strong>onselect</strong><span class="classifier">function</span></dt><dd><p>Whenever the lasso is released, the <em>onselect</em> function is called and
passed the vertices of the selected path.</p>
</dd>
<dt><strong>button</strong><span class="classifier"><a class="reference internal" href="backend_bases_api.html#matplotlib.backend_bases.MouseButton" title="matplotlib.backend_bases.MouseButton"><code class="xref py py-obj docutils literal notranslate"><span class="pre">MouseButton</span></code></a> or list of <a class="reference internal" href="backend_bases_api.html#matplotlib.backend_bases.MouseButton" title="matplotlib.backend_bases.MouseButton"><code class="xref py py-obj docutils literal notranslate"><span class="pre">MouseButton</span></code></a>, optional</span></dt><dd><p>The mouse buttons used for rectangle selection. Default is <code class="docutils literal notranslate"><span class="pre">None</span></code>,
which corresponds to all buttons.</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
<dl class="py method">
<dt id="matplotlib.widgets.LassoSelector.onpress">
<code class="descname">onpress</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">event</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#LassoSelector.onpress"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.LassoSelector.onpress" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.LassoSelector.onrelease">
<code class="descname">onrelease</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">event</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#LassoSelector.onrelease"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.LassoSelector.onrelease" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
</dd></dl>
<dl class="py class">
<dt id="matplotlib.widgets.LockDraw">
<em class="property">class </em><code class="descclassname">matplotlib.widgets.</code><code class="descname">LockDraw</code><a class="reference internal" href="../_modules/matplotlib/widgets.html#LockDraw"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.LockDraw" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference external" href="https://docs.python.org/3/library/functions.html#object" title="(in Python v3.8)"><code class="xref py py-class docutils literal notranslate"><span class="pre">object</span></code></a></p>
<p>Some widgets, like the cursor, draw onto the canvas, and this is not
desirable under all circumstances, like when the toolbar is in zoom-to-rect
mode and drawing a rectangle. To avoid this, a widget can acquire a
canvas' lock with <code class="docutils literal notranslate"><span class="pre">canvas.widgetlock(widget)</span></code> before drawing on the
canvas; this will prevent other widgets from doing so at the same time (if
they also try to acquire the lock first).</p>
<dl class="py method">
<dt id="matplotlib.widgets.LockDraw.available">
<code class="descname">available</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">o</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#LockDraw.available"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.LockDraw.available" title="Permalink to this definition">¶</a></dt>
<dd><p>Return whether drawing is available to <em>o</em>.</p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.LockDraw.isowner">
<code class="descname">isowner</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">o</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#LockDraw.isowner"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.LockDraw.isowner" title="Permalink to this definition">¶</a></dt>
<dd><p>Return whether <em>o</em> owns this lock.</p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.LockDraw.locked">
<code class="descname">locked</code><span class="sig-paren">(</span><em><span class="n">self</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#LockDraw.locked"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.LockDraw.locked" title="Permalink to this definition">¶</a></dt>
<dd><p>Return whether the lock is currently held by an owner.</p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.LockDraw.release">
<code class="descname">release</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">o</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#LockDraw.release"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.LockDraw.release" title="Permalink to this definition">¶</a></dt>
<dd><p>Release the lock from <em>o</em>.</p>
</dd></dl>
</dd></dl>
<dl class="py class">
<dt id="matplotlib.widgets.MultiCursor">
<em class="property">class </em><code class="descclassname">matplotlib.widgets.</code><code class="descname">MultiCursor</code><span class="sig-paren">(</span><em><span class="n">canvas</span></em>, <em><span class="n">axes</span></em>, <em><span class="n">useblit</span><span class="o">=</span><span class="default_value">True</span></em>, <em><span class="n">horizOn</span><span class="o">=</span><span class="default_value">False</span></em>, <em><span class="n">vertOn</span><span class="o">=</span><span class="default_value">True</span></em>, <em><span class="o">**</span><span class="n">lineprops</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#MultiCursor"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.MultiCursor" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#matplotlib.widgets.Widget" title="matplotlib.widgets.Widget"><code class="xref py py-class docutils literal notranslate"><span class="pre">matplotlib.widgets.Widget</span></code></a></p>
<p>Provide a vertical (default) and/or horizontal line cursor shared between
multiple axes.</p>
<p>For the cursor to remain responsive you must keep a reference to it.</p>
<p>Example usage:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">matplotlib.widgets</span> <span class="kn">import</span> <span class="n">MultiCursor</span>
<span class="kn">import</span> <span class="nn">matplotlib.pyplot</span> <span class="k">as</span> <span class="nn">plt</span>
<span class="kn">import</span> <span class="nn">numpy</span> <span class="k">as</span> <span class="nn">np</span>
<span class="n">fig</span><span class="p">,</span> <span class="p">(</span><span class="n">ax1</span><span class="p">,</span> <span class="n">ax2</span><span class="p">)</span> <span class="o">=</span> <span class="n">plt</span><span class="o">.</span><span class="n">subplots</span><span class="p">(</span><span class="n">nrows</span><span class="o">=</span><span class="mi">2</span><span class="p">,</span> <span class="n">sharex</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="n">t</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">arange</span><span class="p">(</span><span class="mf">0.0</span><span class="p">,</span> <span class="mf">2.0</span><span class="p">,</span> <span class="mf">0.01</span><span class="p">)</span>
<span class="n">ax1</span><span class="o">.</span><span class="n">plot</span><span class="p">(</span><span class="n">t</span><span class="p">,</span> <span class="n">np</span><span class="o">.</span><span class="n">sin</span><span class="p">(</span><span class="mi">2</span><span class="o">*</span><span class="n">np</span><span class="o">.</span><span class="n">pi</span><span class="o">*</span><span class="n">t</span><span class="p">))</span>
<span class="n">ax2</span><span class="o">.</span><span class="n">plot</span><span class="p">(</span><span class="n">t</span><span class="p">,</span> <span class="n">np</span><span class="o">.</span><span class="n">sin</span><span class="p">(</span><span class="mi">4</span><span class="o">*</span><span class="n">np</span><span class="o">.</span><span class="n">pi</span><span class="o">*</span><span class="n">t</span><span class="p">))</span>
<span class="n">multi</span> <span class="o">=</span> <span class="n">MultiCursor</span><span class="p">(</span><span class="n">fig</span><span class="o">.</span><span class="n">canvas</span><span class="p">,</span> <span class="p">(</span><span class="n">ax1</span><span class="p">,</span> <span class="n">ax2</span><span class="p">),</span> <span class="n">color</span><span class="o">=</span><span class="s1">'r'</span><span class="p">,</span> <span class="n">lw</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span>
<span class="n">horizOn</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">vertOn</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="n">plt</span><span class="o">.</span><span class="n">show</span><span class="p">()</span>
</pre></div>
</div>
<dl class="py method">
<dt id="matplotlib.widgets.MultiCursor.clear">
<code class="descname">clear</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">event</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#MultiCursor.clear"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.MultiCursor.clear" title="Permalink to this definition">¶</a></dt>
<dd><p>clear the cursor</p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.MultiCursor.connect">
<code class="descname">connect</code><span class="sig-paren">(</span><em><span class="n">self</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#MultiCursor.connect"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.MultiCursor.connect" title="Permalink to this definition">¶</a></dt>
<dd><p>connect events</p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.MultiCursor.disconnect">
<code class="descname">disconnect</code><span class="sig-paren">(</span><em><span class="n">self</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#MultiCursor.disconnect"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.MultiCursor.disconnect" title="Permalink to this definition">¶</a></dt>
<dd><p>disconnect events</p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.MultiCursor.onmove">
<code class="descname">onmove</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">event</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#MultiCursor.onmove"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.MultiCursor.onmove" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
</dd></dl>
<dl class="py class">
<dt id="matplotlib.widgets.PolygonSelector">
<em class="property">class </em><code class="descclassname">matplotlib.widgets.</code><code class="descname">PolygonSelector</code><span class="sig-paren">(</span><em><span class="n">ax</span></em>, <em><span class="n">onselect</span></em>, <em><span class="n">useblit</span><span class="o">=</span><span class="default_value">False</span></em>, <em><span class="n">lineprops</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">markerprops</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">vertex_select_radius</span><span class="o">=</span><span class="default_value">15</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#PolygonSelector"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.PolygonSelector" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <code class="xref py py-class docutils literal notranslate"><span class="pre">matplotlib.widgets._SelectorWidget</span></code></p>
<p>Select a polygon region of an axes.</p>
<p>Place vertices with each mouse click, and make the selection by completing
the polygon (clicking on the first vertex). Hold the <em>ctrl</em> key and click
and drag a vertex to reposition it (the <em>ctrl</em> key is not necessary if the
polygon has already been completed). Hold the <em>shift</em> key and click and
drag anywhere in the axes to move all vertices. Press the <em>esc</em> key to
start a new polygon.</p>
<p>For the selector to remain responsive you must keep a reference to
it.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>ax</strong><span class="classifier"><a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes</span></code></a></span></dt><dd><p>The parent axes for the widget.</p>
</dd>
<dt><strong>onselect</strong><span class="classifier">function</span></dt><dd><p>When a polygon is completed or modified after completion,
the <code class="xref py py-obj docutils literal notranslate"><span class="pre">onselect</span></code> function is called and passed a list of the vertices as
<code class="docutils literal notranslate"><span class="pre">(xdata,</span> <span class="pre">ydata)</span></code> tuples.</p>
</dd>
<dt><strong>useblit</strong><span class="classifier">bool, optional</span></dt><dd></dd>
<dt><strong>lineprops</strong><span class="classifier">dict, optional</span></dt><dd><p>The line for the sides of the polygon is drawn with the properties
given by <code class="xref py py-obj docutils literal notranslate"><span class="pre">lineprops</span></code>. The default is <code class="docutils literal notranslate"><span class="pre">dict(color='k',</span> <span class="pre">linestyle='-',</span>
<span class="pre">linewidth=2,</span> <span class="pre">alpha=0.5)</span></code>.</p>
</dd>
<dt><strong>markerprops</strong><span class="classifier">dict, optional</span></dt><dd><p>The markers for the vertices of the polygon are drawn with the
properties given by <code class="xref py py-obj docutils literal notranslate"><span class="pre">markerprops</span></code>. The default is <code class="docutils literal notranslate"><span class="pre">dict(marker='o',</span>
<span class="pre">markersize=7,</span> <span class="pre">mec='k',</span> <span class="pre">mfc='k',</span> <span class="pre">alpha=0.5)</span></code>.</p>
</dd>
<dt><strong>vertex_select_radius</strong><span class="classifier">float, optional</span></dt><dd><p>A vertex is selected (to complete the polygon or to move a vertex)
if the mouse click is within <code class="xref py py-obj docutils literal notranslate"><span class="pre">vertex_select_radius</span></code> pixels of the
vertex. The default radius is 15 pixels.</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
<p class="rubric">Examples</p>
<p><a class="reference internal" href="../gallery/widgets/polygon_selector_demo.html"><span class="doc">Polygon Selector Demo</span></a></p>
<dl class="py method">
<dt id="matplotlib.widgets.PolygonSelector.onmove">
<code class="descname">onmove</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">event</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#PolygonSelector.onmove"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.PolygonSelector.onmove" title="Permalink to this definition">¶</a></dt>
<dd><p>Cursor move event handler and validator</p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.PolygonSelector.verts">
<em class="property">property </em><code class="descname">verts</code><a class="headerlink" href="#matplotlib.widgets.PolygonSelector.verts" title="Permalink to this definition">¶</a></dt>
<dd><p>The polygon vertices, as a list of <code class="docutils literal notranslate"><span class="pre">(x,</span> <span class="pre">y)</span></code> pairs.</p>
</dd></dl>
</dd></dl>
<dl class="py class">
<dt id="matplotlib.widgets.RadioButtons">
<em class="property">class </em><code class="descclassname">matplotlib.widgets.</code><code class="descname">RadioButtons</code><span class="sig-paren">(</span><em><span class="n">ax</span></em>, <em><span class="n">labels</span></em>, <em><span class="n">active</span><span class="o">=</span><span class="default_value">0</span></em>, <em><span class="n">activecolor</span><span class="o">=</span><span class="default_value">'blue'</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#RadioButtons"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.RadioButtons" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#matplotlib.widgets.AxesWidget" title="matplotlib.widgets.AxesWidget"><code class="xref py py-class docutils literal notranslate"><span class="pre">matplotlib.widgets.AxesWidget</span></code></a></p>
<p>A GUI neutral radio button.</p>
<p>For the buttons to remain responsive you must keep a reference to this
object.</p>
<p>Connect to the RadioButtons with the <a class="reference internal" href="#matplotlib.widgets.RadioButtons.on_clicked" title="matplotlib.widgets.RadioButtons.on_clicked"><code class="xref py py-meth docutils literal notranslate"><span class="pre">on_clicked()</span></code></a> method.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Attributes:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>ax</strong></dt><dd><p>The containing <a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes</span></code></a> instance.</p>
</dd>
<dt><strong>activecolor</strong></dt><dd><p>The color of the selected button.</p>
</dd>
<dt><strong>labels</strong></dt><dd><p>A list of <a class="reference internal" href="text_api.html#matplotlib.text.Text" title="matplotlib.text.Text"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Text</span></code></a> instances containing the button labels.</p>
</dd>
<dt><strong>circles</strong></dt><dd><p>A list of <a class="reference internal" href="_as_gen/matplotlib.patches.Circle.html#matplotlib.patches.Circle" title="matplotlib.patches.Circle"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Circle</span></code></a> instances defining the buttons.</p>
</dd>
<dt><strong>value_selected</strong><span class="classifier">str</span></dt><dd><p>The label text of the currently selected button.</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
<p>Add radio buttons to an <a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes</span></code></a>.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>ax</strong><span class="classifier"><a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Axes</span></code></a></span></dt><dd><p>The axes to add the buttons to.</p>
</dd>
<dt><strong>labels</strong><span class="classifier">list of str</span></dt><dd><p>The button labels.</p>
</dd>
<dt><strong>active</strong><span class="classifier">int</span></dt><dd><p>The index of the initially selected button.</p>
</dd>
<dt><strong>activecolor</strong><span class="classifier">color</span></dt><dd><p>The color of the selected button.</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
<dl class="py method">
<dt id="matplotlib.widgets.RadioButtons.disconnect">
<code class="descname">disconnect</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">cid</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#RadioButtons.disconnect"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.RadioButtons.disconnect" title="Permalink to this definition">¶</a></dt>
<dd><p>Remove the observer with connection id <em>cid</em>.</p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.RadioButtons.on_clicked">
<code class="descname">on_clicked</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">func</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#RadioButtons.on_clicked"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.RadioButtons.on_clicked" title="Permalink to this definition">¶</a></dt>
<dd><p>Connect the callback function <em>func</em> to button click events.</p>
<p>Returns a connection id, which can be used to disconnect the callback.</p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.RadioButtons.set_active">
<code class="descname">set_active</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">index</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#RadioButtons.set_active"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.RadioButtons.set_active" title="Permalink to this definition">¶</a></dt>
<dd><p>Select button with number <em>index</em>.</p>
<p>Callbacks will be triggered if <code class="xref py py-attr docutils literal notranslate"><span class="pre">eventson</span></code> is True.</p>
</dd></dl>
</dd></dl>
<dl class="py class">
<dt id="matplotlib.widgets.RectangleSelector">
<em class="property">class </em><code class="descclassname">matplotlib.widgets.</code><code class="descname">RectangleSelector</code><span class="sig-paren">(</span><em><span class="n">ax</span></em>, <em><span class="n">onselect</span></em>, <em><span class="n">drawtype</span><span class="o">=</span><span class="default_value">'box'</span></em>, <em><span class="n">minspanx</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">minspany</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">useblit</span><span class="o">=</span><span class="default_value">False</span></em>, <em><span class="n">lineprops</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">rectprops</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">spancoords</span><span class="o">=</span><span class="default_value">'data'</span></em>, <em><span class="n">button</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">maxdist</span><span class="o">=</span><span class="default_value">10</span></em>, <em><span class="n">marker_props</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">interactive</span><span class="o">=</span><span class="default_value">False</span></em>, <em><span class="n">state_modifier_keys</span><span class="o">=</span><span class="default_value">None</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#RectangleSelector"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.RectangleSelector" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <code class="xref py py-class docutils literal notranslate"><span class="pre">matplotlib.widgets._SelectorWidget</span></code></p>
<p>Select a rectangular region of an axes.</p>
<p>For the cursor to remain responsive you must keep a reference to it.</p>
<p>Example usage:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">numpy</span> <span class="k">as</span> <span class="nn">np</span>
<span class="kn">import</span> <span class="nn">matplotlib.pyplot</span> <span class="k">as</span> <span class="nn">plt</span>
<span class="kn">from</span> <span class="nn">matplotlib.widgets</span> <span class="kn">import</span> <span class="n">RectangleSelector</span>
<span class="k">def</span> <span class="nf">onselect</span><span class="p">(</span><span class="n">eclick</span><span class="p">,</span> <span class="n">erelease</span><span class="p">):</span>
<span class="s2">"eclick and erelease are matplotlib events at press and release."</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">'startposition: (</span><span class="si">%f</span><span class="s1">, </span><span class="si">%f</span><span class="s1">)'</span> <span class="o">%</span> <span class="p">(</span><span class="n">eclick</span><span class="o">.</span><span class="n">xdata</span><span class="p">,</span> <span class="n">eclick</span><span class="o">.</span><span class="n">ydata</span><span class="p">))</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">'endposition : (</span><span class="si">%f</span><span class="s1">, </span><span class="si">%f</span><span class="s1">)'</span> <span class="o">%</span> <span class="p">(</span><span class="n">erelease</span><span class="o">.</span><span class="n">xdata</span><span class="p">,</span> <span class="n">erelease</span><span class="o">.</span><span class="n">ydata</span><span class="p">))</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">'used button : '</span><span class="p">,</span> <span class="n">eclick</span><span class="o">.</span><span class="n">button</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">toggle_selector</span><span class="p">(</span><span class="n">event</span><span class="p">):</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">'Key pressed.'</span><span class="p">)</span>
<span class="k">if</span> <span class="n">event</span><span class="o">.</span><span class="n">key</span> <span class="ow">in</span> <span class="p">[</span><span class="s1">'Q'</span><span class="p">,</span> <span class="s1">'q'</span><span class="p">]</span> <span class="ow">and</span> <span class="n">toggle_selector</span><span class="o">.</span><span class="n">RS</span><span class="o">.</span><span class="n">active</span><span class="p">:</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">'RectangleSelector deactivated.'</span><span class="p">)</span>
<span class="n">toggle_selector</span><span class="o">.</span><span class="n">RS</span><span class="o">.</span><span class="n">set_active</span><span class="p">(</span><span class="kc">False</span><span class="p">)</span>
<span class="k">if</span> <span class="n">event</span><span class="o">.</span><span class="n">key</span> <span class="ow">in</span> <span class="p">[</span><span class="s1">'A'</span><span class="p">,</span> <span class="s1">'a'</span><span class="p">]</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">toggle_selector</span><span class="o">.</span><span class="n">RS</span><span class="o">.</span><span class="n">active</span><span class="p">:</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">'RectangleSelector activated.'</span><span class="p">)</span>
<span class="n">toggle_selector</span><span class="o">.</span><span class="n">RS</span><span class="o">.</span><span class="n">set_active</span><span class="p">(</span><span class="kc">True</span><span class="p">)</span>
<span class="n">x</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">arange</span><span class="p">(</span><span class="mf">100.</span><span class="p">)</span> <span class="o">/</span> <span class="mi">99</span>
<span class="n">y</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">sin</span><span class="p">(</span><span class="n">x</span><span class="p">)</span>
<span class="n">fig</span><span class="p">,</span> <span class="n">ax</span> <span class="o">=</span> <span class="n">plt</span><span class="o">.</span><span class="n">subplots</span><span class="p">()</span>
<span class="n">ax</span><span class="o">.</span><span class="n">plot</span><span class="p">(</span><span class="n">x</span><span class="p">,</span> <span class="n">y</span><span class="p">)</span>
<span class="n">toggle_selector</span><span class="o">.</span><span class="n">RS</span> <span class="o">=</span> <span class="n">RectangleSelector</span><span class="p">(</span><span class="n">ax</span><span class="p">,</span> <span class="n">onselect</span><span class="p">,</span> <span class="n">drawtype</span><span class="o">=</span><span class="s1">'line'</span><span class="p">)</span>
<span class="n">fig</span><span class="o">.</span><span class="n">canvas</span><span class="o">.</span><span class="n">mpl_connect</span><span class="p">(</span><span class="s1">'key_press_event'</span><span class="p">,</span> <span class="n">toggle_selector</span><span class="p">)</span>
<span class="n">plt</span><span class="o">.</span><span class="n">show</span><span class="p">()</span>
</pre></div>
</div>
<p>Create a selector in <em>ax</em>. When a selection is made, clear
the span and call onselect with:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">onselect</span><span class="p">(</span><span class="n">pos_1</span><span class="p">,</span> <span class="n">pos_2</span><span class="p">)</span>
</pre></div>
</div>
<p>and clear the drawn box/line. The <code class="docutils literal notranslate"><span class="pre">pos_1</span></code> and <code class="docutils literal notranslate"><span class="pre">pos_2</span></code> are
arrays of length 2 containing the x- and y-coordinate.</p>
<p>If <em>minspanx</em> is not <em>None</em> then events smaller than <em>minspanx</em>
in x direction are ignored (it's the same for y).</p>
<p>The rectangle is drawn with <em>rectprops</em>; default:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">rectprops</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">(</span><span class="n">facecolor</span><span class="o">=</span><span class="s1">'red'</span><span class="p">,</span> <span class="n">edgecolor</span> <span class="o">=</span> <span class="s1">'black'</span><span class="p">,</span>
<span class="n">alpha</span><span class="o">=</span><span class="mf">0.2</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
</pre></div>
</div>
<p>The line is drawn with <em>lineprops</em>; default:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">lineprops</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">(</span><span class="n">color</span><span class="o">=</span><span class="s1">'black'</span><span class="p">,</span> <span class="n">linestyle</span><span class="o">=</span><span class="s1">'-'</span><span class="p">,</span>
<span class="n">linewidth</span> <span class="o">=</span> <span class="mi">2</span><span class="p">,</span> <span class="n">alpha</span><span class="o">=</span><span class="mf">0.5</span><span class="p">)</span>
</pre></div>
</div>
<p>Use <em>drawtype</em> if you want the mouse to draw a line,
a box or nothing between click and actual position by setting</p>
<p><code class="docutils literal notranslate"><span class="pre">drawtype</span> <span class="pre">=</span> <span class="pre">'line'</span></code>, <code class="docutils literal notranslate"><span class="pre">drawtype='box'</span></code> or <code class="docutils literal notranslate"><span class="pre">drawtype</span> <span class="pre">=</span> <span class="pre">'none'</span></code>.
Drawing a line would result in a line from vertex A to vertex C in
a rectangle ABCD.</p>
<p><em>spancoords</em> is one of 'data' or 'pixels'. If 'data', <em>minspanx</em>
and <em>minspanx</em> will be interpreted in the same coordinates as
the x and y axis. If 'pixels', they are in pixels.</p>
<p><em>button</em> is a list of integers indicating which mouse buttons should
be used for rectangle selection. You can also specify a single
integer if only a single button is desired. Default is <em>None</em>,
which does not limit which button can be used.</p>
<dl class="docutils">
<dt>Note, typically:</dt><dd>1 = left mouse button
2 = center mouse button (scroll wheel)
3 = right mouse button</dd>
</dl>
<p><em>interactive</em> will draw a set of handles and allow you interact
with the widget after it is drawn.</p>
<p><em>state_modifier_keys</em> are keyboard modifiers that affect the behavior
of the widget.</p>
<p>The defaults are:
dict(move=' ', clear='escape', square='shift', center='ctrl')</p>
<p>Keyboard modifiers, which:
'move': Move the existing shape.
'clear': Clear the current shape.
'square': Makes the shape square.
'center': Make the initial point the center of the shape.
'square' and 'center' can be combined.</p>
<dl class="py method">
<dt id="matplotlib.widgets.RectangleSelector.center">
<em class="property">property </em><code class="descname">center</code><a class="headerlink" href="#matplotlib.widgets.RectangleSelector.center" title="Permalink to this definition">¶</a></dt>
<dd><p>Center of rectangle</p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.RectangleSelector.corners">
<em class="property">property </em><code class="descname">corners</code><a class="headerlink" href="#matplotlib.widgets.RectangleSelector.corners" title="Permalink to this definition">¶</a></dt>
<dd><p>Corners of rectangle from lower left, moving clockwise.</p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.RectangleSelector.draw_shape">
<code class="descname">draw_shape</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">extents</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#RectangleSelector.draw_shape"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.RectangleSelector.draw_shape" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.RectangleSelector.edge_centers">
<em class="property">property </em><code class="descname">edge_centers</code><a class="headerlink" href="#matplotlib.widgets.RectangleSelector.edge_centers" title="Permalink to this definition">¶</a></dt>
<dd><p>Midpoint of rectangle edges from left, moving clockwise.</p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.RectangleSelector.extents">
<em class="property">property </em><code class="descname">extents</code><a class="headerlink" href="#matplotlib.widgets.RectangleSelector.extents" title="Permalink to this definition">¶</a></dt>
<dd><p>Return (xmin, xmax, ymin, ymax).</p>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.RectangleSelector.geometry">
<em class="property">property </em><code class="descname">geometry</code><a class="headerlink" href="#matplotlib.widgets.RectangleSelector.geometry" title="Permalink to this definition">¶</a></dt>
<dd><p>Return an array of shape (2, 5) containing the
x (<code class="docutils literal notranslate"><span class="pre">RectangleSelector.geometry[1,</span> <span class="pre">:]</span></code>) and
y (<code class="docutils literal notranslate"><span class="pre">RectangleSelector.geometry[0,</span> <span class="pre">:]</span></code>) coordinates
of the four corners of the rectangle starting and ending
in the top left corner.</p>
</dd></dl>
</dd></dl>
<dl class="py class">
<dt id="matplotlib.widgets.Slider">
<em class="property">class </em><code class="descclassname">matplotlib.widgets.</code><code class="descname">Slider</code><span class="sig-paren">(</span><em><span class="n">ax</span></em>, <em><span class="n">label</span></em>, <em><span class="n">valmin</span></em>, <em><span class="n">valmax</span></em>, <em><span class="n">valinit</span><span class="o">=</span><span class="default_value">0.5</span></em>, <em><span class="n">valfmt</span><span class="o">=</span><span class="default_value">'%1.2f'</span></em>, <em><span class="n">closedmin</span><span class="o">=</span><span class="default_value">True</span></em>, <em><span class="n">closedmax</span><span class="o">=</span><span class="default_value">True</span></em>, <em><span class="n">slidermin</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">slidermax</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">dragging</span><span class="o">=</span><span class="default_value">True</span></em>, <em><span class="n">valstep</span><span class="o">=</span><span class="default_value">None</span></em>, <em><span class="n">orientation</span><span class="o">=</span><span class="default_value">'horizontal'</span></em>, <em><span class="o">**</span><span class="n">kwargs</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#Slider"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.Slider" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a class="reference internal" href="#matplotlib.widgets.AxesWidget" title="matplotlib.widgets.AxesWidget"><code class="xref py py-class docutils literal notranslate"><span class="pre">matplotlib.widgets.AxesWidget</span></code></a></p>
<p>A slider representing a floating point range.</p>
<p>Create a slider from <em>valmin</em> to <em>valmax</em> in axes <em>ax</em>. For the slider to
remain responsive you must maintain a reference to it. Call
<a class="reference internal" href="#matplotlib.widgets.Slider.on_changed" title="matplotlib.widgets.Slider.on_changed"><code class="xref py py-meth docutils literal notranslate"><span class="pre">on_changed()</span></code></a> to connect to the slider event.</p>
<table class="docutils field-list" frame="void" rules="none">
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<tr class="field-odd field"><th class="field-name">Attributes:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>val</strong><span class="classifier">float</span></dt><dd><p>Slider value.</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
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<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>ax</strong><span class="classifier">Axes</span></dt><dd><p>The Axes to put the slider in.</p>
</dd>
<dt><strong>label</strong><span class="classifier">str</span></dt><dd><p>Slider label.</p>
</dd>
<dt><strong>valmin</strong><span class="classifier">float</span></dt><dd><p>The minimum value of the slider.</p>
</dd>
<dt><strong>valmax</strong><span class="classifier">float</span></dt><dd><p>The maximum value of the slider.</p>
</dd>
<dt><strong>valinit</strong><span class="classifier">float, optional, default: 0.5</span></dt><dd><p>The slider initial position.</p>
</dd>
<dt><strong>valfmt</strong><span class="classifier">str, optional, default: "%1.2f"</span></dt><dd><p>Used to format the slider value, fprint format string.</p>
</dd>
<dt><strong>closedmin</strong><span class="classifier">bool, optional, default: True</span></dt><dd><p>Whether the slider interval is closed on the bottom.</p>
</dd>
<dt><strong>closedmax</strong><span class="classifier">bool, optional, default: True</span></dt><dd><p>Whether the slider interval is closed on the top.</p>
</dd>
<dt><strong>slidermin</strong><span class="classifier">Slider, optional, default: None</span></dt><dd><p>Do not allow the current slider to have a value less than
the value of the Slider <code class="xref py py-obj docutils literal notranslate"><span class="pre">slidermin</span></code>.</p>
</dd>
<dt><strong>slidermax</strong><span class="classifier">Slider, optional, default: None</span></dt><dd><p>Do not allow the current slider to have a value greater than
the value of the Slider <code class="xref py py-obj docutils literal notranslate"><span class="pre">slidermax</span></code>.</p>
</dd>
<dt><strong>dragging</strong><span class="classifier">bool, optional, default: True</span></dt><dd><p>If True the slider can be dragged by the mouse.</p>
</dd>
<dt><strong>valstep</strong><span class="classifier">float, optional, default: None</span></dt><dd><p>If given, the slider will snap to multiples of <code class="xref py py-obj docutils literal notranslate"><span class="pre">valstep</span></code>.</p>
</dd>
<dt><strong>orientation</strong><span class="classifier">{'horizontal', 'vertical'}, default: 'horizontal'</span></dt><dd><p>The orientation of the slider.</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
<p class="rubric">Notes</p>
<p>Additional kwargs are passed on to <code class="docutils literal notranslate"><span class="pre">self.poly</span></code> which is the
<a class="reference internal" href="_as_gen/matplotlib.patches.Rectangle.html#matplotlib.patches.Rectangle" title="matplotlib.patches.Rectangle"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Rectangle</span></code></a> that draws the slider knob. See the
<a class="reference internal" href="_as_gen/matplotlib.patches.Rectangle.html#matplotlib.patches.Rectangle" title="matplotlib.patches.Rectangle"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Rectangle</span></code></a> documentation for valid property names (<code class="docutils literal notranslate"><span class="pre">facecolor</span></code>,
<code class="docutils literal notranslate"><span class="pre">edgecolor</span></code>, <code class="docutils literal notranslate"><span class="pre">alpha</span></code>, etc.).</p>
<dl class="py method">
<dt id="matplotlib.widgets.Slider.disconnect">
<code class="descname">disconnect</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">cid</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#Slider.disconnect"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.Slider.disconnect" title="Permalink to this definition">¶</a></dt>
<dd><p>Remove the observer with connection id <em>cid</em></p>
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<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>cid</strong><span class="classifier">int</span></dt><dd><p>Connection id of the observer to be removed</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.Slider.on_changed">
<code class="descname">on_changed</code><span class="sig-paren">(</span><em><span class="n">self</span></em>, <em><span class="n">func</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#Slider.on_changed"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.Slider.on_changed" title="Permalink to this definition">¶</a></dt>
<dd><p>When the slider value is changed call <em>func</em> with the new
slider value</p>
<table class="docutils field-list" frame="void" rules="none">
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<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first docutils">
<dt><strong>func</strong><span class="classifier">callable</span></dt><dd><p>Function to call when slider is changed.
The function must accept a single float as its arguments.</p>
</dd>
</dl>
</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><dl class="first last docutils">
<dt><strong>cid</strong><span class="classifier">int</span></dt><dd><p>Connection id (which can be used to disconnect <em>func</em>)</p>
</dd>
</dl>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="py method">
<dt id="matplotlib.widgets.Slider.reset">
<code class="descname">reset</code><span class="sig-paren">(</span><em><span class="n">self</span></em><span class="sig-paren">)</span><a class="reference internal" href="../_modules/matplotlib/widgets.html#Slider.reset"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#matplotlib.widgets.Slider.reset" title="Permalink to this definition">¶</a></dt>
<dd><p>Reset the slider to the initial value</p>
</dd></dl>
<dl class="py method">