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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title>matplotlib.widgets — Matplotlib 3.1.3 documentation</title>

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<div id="unreleased-message"> You are reading an old version of the documentation (v3.1.3). 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>

<div style="float: left; position: absolute; width: 496px; bottom: 0; padding-bottom: 24px">Version 3.1.3</div>

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<h3><a href="../contents.html">Table of Contents</a></h3>

<ul>

<li><a class="reference internal" href="#"><code class="docutils literal notranslate">matplotlib.widgets</code></a><ul>

<li><a class="reference internal" href="#gui-neutral-widgets">GUI neutral widgets</a></li>

</ul>

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<h1><code class="docutils literal notranslate">matplotlib.widgets</code><a class="headerlink" href="#matplotlib-widgets" title="Permalink to this headline">¶</a></h1>

</map><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>

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-class docutils literal notranslate">matplotlib.axes.Axes</code></a>

instance and pass that as the first arg. 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.

class <code class="descclassname">matplotlib.widgets.</code><code class="descname">AxesWidget</code>(ax)<a class="reference internal" href="../_modules/matplotlib/widgets.html#AxesWidget">[source]</a><a class="headerlink" href="#matplotlib.widgets.AxesWidget" title="Permalink to this definition">¶</a></dt>

<dd>Bases: <a class="reference internal" href="#matplotlib.widgets.Widget" title="matplotlib.widgets.Widget"><code class="xref py py-class docutils literal notranslate">matplotlib.widgets.Widget</code></a>

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-class docutils literal notranslate">Axes</code></a>.

To guarantee that the widget remains responsive and not garbage-collected,

a reference to the object should be maintained by the user.

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.

Attributes:

<dd>The parent axes for the widget</dd>

<dt>canvas : <a class="reference internal" href="backend_bases_api.html#matplotlib.backend_bases.FigureCanvasBase" title="matplotlib.backend_bases.FigureCanvasBase"><code class="xref py py-class docutils literal notranslate">FigureCanvasBase</code></a> subclass</dt>

<dd>The parent figure canvas for the widget.</dd>

<dt>active : bool</dt>

<dd>If False, the widget does not respond to events.</dd>

</dl>

<code class="descname">connect_event</code>(self, event, callback)<a class="reference internal" href="../_modules/matplotlib/widgets.html#AxesWidget.connect_event">[source]</a><a class="headerlink" href="#matplotlib.widgets.AxesWidget.connect_event" title="Permalink to this definition">¶</a></dt>

<dd>Connect callback with an event.

This should be used in lieu of <code class="xref py py-obj docutils literal notranslate">figure.canvas.mpl_connect</code> since this

function stores callback ids for later clean up.

</dd></dl>

<code class="descname">disconnect_events</code>(self)<a class="reference internal" href="../_modules/matplotlib/widgets.html#AxesWidget.disconnect_events">[source]</a><a class="headerlink" href="#matplotlib.widgets.AxesWidget.disconnect_events" title="Permalink to this definition">¶</a></dt>

<dd>Disconnect all events created by this widget.

</dd></dl>

class <code class="descclassname">matplotlib.widgets.</code><code class="descname">Button</code>(ax, label, image=None, color='0.85', hovercolor='0.95')<a class="reference internal" href="../_modules/matplotlib/widgets.html#Button">[source]</a><a class="headerlink" href="#matplotlib.widgets.Button" title="Permalink to this definition">¶</a></dt>

<dd>Bases: <a class="reference internal" href="#matplotlib.widgets.AxesWidget" title="matplotlib.widgets.AxesWidget"><code class="xref py py-class docutils literal notranslate">matplotlib.widgets.AxesWidget</code></a>

A GUI neutral button.

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-meth docutils literal notranslate">on_clicked()</code></a> to connect to the button.

<tr class="field-odd field"><th class="field-name">Attributes:</th><td class="field-body"><dl class="first last docutils">

<dd>The <a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-class docutils literal notranslate">matplotlib.axes.Axes</code></a> the button renders into.

</dd>

<dt>label</dt>

<dd>A <a class="reference internal" href="text_api.html#matplotlib.text.Text" title="matplotlib.text.Text"><code class="xref py py-class docutils literal notranslate">matplotlib.text.Text</code></a> instance.

</dd>

<dt>color</dt>

<dd>The color of the button when not hovering.

</dd>

<dt>hovercolor</dt>

<dd>The color of the button when hovering.

</dd>

</dl>

</td>

</tr>

</tbody>

</table>

<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">

<dd>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">Axes</code></a> instance the button will be placed into.

</dd>

<dt>label : str</dt>

<dd>The button text. Accepts string.

</dd>

<dt>image : array, mpl image, Pillow Image</dt>

<dd>The image to place in the button, if not None.

Can be any legal arg to imshow (numpy array,

matplotlib Image instance, or Pillow Image).

</dd>

<dt>color : color</dt>

<dd>The color of the button when not activated.

</dd>

<dt>hovercolor : color</dt>

<dd>The color of the button when the mouse is over it.

</dd>

</dl>

</td>

</tr>

</tbody>

</table>

<code class="descname">disconnect</code>(self, cid)<a class="reference internal" href="../_modules/matplotlib/widgets.html#Button.disconnect">[source]</a><a class="headerlink" href="#matplotlib.widgets.Button.disconnect" title="Permalink to this definition">¶</a></dt>

<dd>Remove the callback function with connection id cid.

</dd></dl>

<code class="descname">on_clicked</code>(self, func)<a class="reference internal" href="../_modules/matplotlib/widgets.html#Button.on_clicked">[source]</a><a class="headerlink" href="#matplotlib.widgets.Button.on_clicked" title="Permalink to this definition">¶</a></dt>

<dd>Connect the callback function func to button click events.

Returns a connection id, which can be used to disconnect the callback.

</dd></dl>

class <code class="descclassname">matplotlib.widgets.</code><code class="descname">CheckButtons</code>(ax, labels, actives=None)<a class="reference internal" href="../_modules/matplotlib/widgets.html#CheckButtons">[source]</a><a class="headerlink" href="#matplotlib.widgets.CheckButtons" title="Permalink to this definition">¶</a></dt>

A GUI neutral set of check buttons.

For the check buttons to remain responsive you must keep a

reference to this object.

The following attributes are exposed

<dd>The <a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-class docutils literal notranslate">matplotlib.axes.Axes</code></a> instance the buttons are

located in</dd>

<dt>labels</dt>

<dd>List of <a class="reference internal" href="text_api.html#matplotlib.text.Text" title="matplotlib.text.Text"><code class="xref py py-class docutils literal notranslate">matplotlib.text.Text</code></a> instances</dd>

<dt>lines</dt>

<dd>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">set_visible(False)</code>

when its box is not checked.</dd>

<dt>rectangles</dt>

<dd>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-class docutils literal notranslate">matplotlib.patches.Rectangle</code></a> instances</dd>

</dl>

</div></blockquote>

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">on_clicked()</code></a> method

Add check buttons to <a class="reference internal" href="axes_api.html#matplotlib.axes.Axes" title="matplotlib.axes.Axes"><code class="xref py py-class docutils literal notranslate">matplotlib.axes.Axes</code></a> instance ax

<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">

<dd>The parent axes for the widget.

</dd>

<dt>labels : List[str]</dt>

<dd>The labels of the check buttons.

</dd>

<dt>actives : List[bool], optional</dt>

<dd>The initial check states of the buttons. The list must have the

same length as labels. If not given, all buttons are unchecked.

</dd>

</dl>

</td>

</tr>

</tbody>

</table>

<code class="descname">disconnect</code>(self, cid)<a class="reference internal" href="../_modules/matplotlib/widgets.html#CheckButtons.disconnect">[source]</a><a class="headerlink" href="#matplotlib.widgets.CheckButtons.disconnect" title="Permalink to this definition">¶</a></dt>

<dd>remove the observer with connection id cid

</dd></dl>

<code class="descname">get_status</code>(self)<a class="reference internal" href="../_modules/matplotlib/widgets.html#CheckButtons.get_status">[source]</a><a class="headerlink" href="#matplotlib.widgets.CheckButtons.get_status" title="Permalink to this definition">¶</a></dt>

<dd>Return a tuple of the status (True/False) of all of the check buttons.

</dd></dl>

<code class="descname">on_clicked</code>(self, func)<a class="reference internal" href="../_modules/matplotlib/widgets.html#CheckButtons.on_clicked">[source]</a><a class="headerlink" href="#matplotlib.widgets.CheckButtons.on_clicked" title="Permalink to this definition">¶</a></dt>

<dd>Connect the callback function func to button click events.

Returns a connection id, which can be used to disconnect the callback.

</dd></dl>

<code class="descname">set_active</code>(self, index)<a class="reference internal" href="../_modules/matplotlib/widgets.html#CheckButtons.set_active">[source]</a><a class="headerlink" href="#matplotlib.widgets.CheckButtons.set_active" title="Permalink to this definition">¶</a></dt>

<dd>Directly (de)activate a check button by index.

<dt>index is an index into the original label list</dt>

<dd>that this object was constructed with.

Raises ValueError if index is invalid.</dd>

</dl>

Callbacks will be triggered if <code class="xref py py-attr docutils literal notranslate">eventson</code> is True.

</dd></dl>

class <code class="descclassname">matplotlib.widgets.</code><code class="descname">Cursor</code>(ax, horizOn=True, vertOn=True, useblit=False, **lineprops)<a class="reference internal" href="../_modules/matplotlib/widgets.html#Cursor">[source]</a><a class="headerlink" href="#matplotlib.widgets.Cursor" title="Permalink to this definition">¶</a></dt>

A crosshair cursor that spans the axes and moves with mouse cursor.

For the cursor to remain responsive you must keep a reference to it.

<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first docutils">

</dd>

<dt>horizOn : bool, optional, default: True</dt>

<dd>Whether to draw the horizontal line.

</dd>

<dt>vertOn : bool, optional, default: True</dt>

<dd>Whether to draw the vertical line.

</dd>

<dt>useblit : bool, optional, default: False</dt>

<dd>Use blitting for faster drawing if supported by the backend.

</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>**lineprops</dt>

<dd><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">Line2D</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">axhline</code></a>.

</dd>

</dl>

</td>

</tr>

</tbody>

</table>

Examples

See <a class="reference internal" href="../gallery/widgets/cursor.html">Cursor</a>.

<code class="descname">clear</code>(self, event)<a class="reference internal" href="../_modules/matplotlib/widgets.html#Cursor.clear">[source]</a><a class="headerlink" href="#matplotlib.widgets.Cursor.clear" title="Permalink to this definition">¶</a></dt>

<dd>Internal event handler to clear the cursor.

</dd></dl>

<code class="descname">onmove</code>(self, event)<a class="reference internal" href="../_modules/matplotlib/widgets.html#Cursor.onmove">[source]</a><a class="headerlink" href="#matplotlib.widgets.Cursor.onmove" title="Permalink to this definition">¶</a></dt>

<dd>Internal event handler to draw the cursor when the mouse moves.

</dd></dl>

class <code class="descclassname">matplotlib.widgets.</code><code class="descname">EllipseSelector</code>(ax, onselect, drawtype='box', minspanx=None, minspany=None, useblit=False, lineprops=None, rectprops=None, spancoords='data', button=None, maxdist=10, marker_props=None, interactive=False, state_modifier_keys=None)<a class="reference internal" href="../_modules/matplotlib/widgets.html#EllipseSelector">[source]</a><a class="headerlink" href="#matplotlib.widgets.EllipseSelector" title="Permalink to this definition">¶</a></dt>

<dd>Bases: <a class="reference internal" href="#matplotlib.widgets.RectangleSelector" title="matplotlib.widgets.RectangleSelector"><code class="xref py py-class docutils literal notranslate">matplotlib.widgets.RectangleSelector</code></a>

Select an elliptical region of an axes.

For the cursor to remain responsive you must keep a reference to

it.

Example usage:

<div class="highlight-default notranslate"><div class="highlight"><pre>import numpy as np

import matplotlib.pyplot as plt

from matplotlib.widgets import EllipseSelector

def onselect(eclick, erelease):

"eclick and erelease are matplotlib events at press and release."

print('startposition: (%f, %f)' % (eclick.xdata, eclick.ydata))

print('endposition : (%f, %f)' % (erelease.xdata, erelease.ydata))

print('used button : ', eclick.button)

def toggle_selector(event):

print(' Key pressed.')

if event.key in ['Q', 'q'] and toggle_selector.ES.active:

print('EllipseSelector deactivated.')

toggle_selector.RS.set_active(False)

if event.key in ['A', 'a'] and not toggle_selector.ES.active:

print('EllipseSelector activated.')

toggle_selector.ES.set_active(True)

x = np.arange(100.) / 99

y = np.sin(x)

fig, ax = plt.subplots()

ax.plot(x, y)

toggle_selector.ES = EllipseSelector(ax, onselect, drawtype='line')

fig.canvas.mpl_connect('key_press_event', toggle_selector)

plt.show()

</pre></div>

</div>

Create a selector in ax. When a selection is made, clear

the span and call onselect with:

<div class="highlight-default notranslate"><div class="highlight"><pre>onselect(pos_1, pos_2)

</pre></div>

</div>

and clear the drawn box/line. The <code class="docutils literal notranslate">pos_1</code> and <code class="docutils literal notranslate">pos_2</code> are

arrays of length 2 containing the x- and y-coordinate.

If minspanx is not None then events smaller than minspanx

in x direction are ignored (it's the same for y).

The rectangle is drawn with rectprops; default:

<div class="highlight-default notranslate"><div class="highlight"><pre>rectprops = dict(facecolor='red', edgecolor = 'black',

alpha=0.2, fill=True)

</pre></div>

</div>

The line is drawn with lineprops; default:

<div class="highlight-default notranslate"><div class="highlight"><pre>lineprops = dict(color='black', linestyle='-',

linewidth = 2, alpha=0.5)

</pre></div>

</div>

Use drawtype if you want the mouse to draw a line,

a box or nothing between click and actual position by setting

<code class="docutils literal notranslate">drawtype = 'line'</code>, <code class="docutils literal notranslate">drawtype='box'</code> or <code class="docutils literal notranslate">drawtype = 'none'</code>.

Drawing a line would result in a line from vertex A to vertex C in

a rectangle ABCD.

spancoords is one of 'data' or 'pixels'. If 'data', minspanx

and minspanx will be interpreted in the same coordinates as

the x and y axis. If 'pixels', they are in pixels.

button 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 None,

which does not limit which button can be used.

<dt>Note, typically:</dt>

<dd>1 = left mouse button

2 = center mouse button (scroll wheel)

3 = right mouse button</dd>

</dl>

interactive will draw a set of handles and allow you interact

with the widget after it is drawn.

state_modifier_keys are keyboard modifiers that affect the behavior

of the widget.

The defaults are:

dict(move=' ', clear='escape', square='shift', center='ctrl')

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.

<code class="descname">draw_shape</code>(self, extents)<a class="reference internal" href="../_modules/matplotlib/widgets.html#EllipseSelector.draw_shape">[source]</a><a class="headerlink" href="#matplotlib.widgets.EllipseSelector.draw_shape" title="Permalink to this definition">¶</a></dt>

</dd></dl>

class <code class="descclassname">matplotlib.widgets.</code><code class="descname">Lasso</code>(ax, xy, callback=None, useblit=True)<a class="reference internal" href="../_modules/matplotlib/widgets.html#Lasso">[source]</a><a class="headerlink" href="#matplotlib.widgets.Lasso" title="Permalink to this definition">¶</a></dt>

Selection curve of an arbitrary shape.

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-func docutils literal notranslate">contains_point()</code></a> to select data points

from an image.

Unlike <a class="reference internal" href="#matplotlib.widgets.LassoSelector" title="matplotlib.widgets.LassoSelector"><code class="xref py py-class docutils literal notranslate">LassoSelector</code></a>, this must be initialized with a starting

point <code class="xref py py-obj docutils literal notranslate">xy</code>, and the <a class="reference internal" href="#matplotlib.widgets.Lasso" title="matplotlib.widgets.Lasso"><code class="xref py py-obj docutils literal notranslate">Lasso</code></a> events are destroyed upon release.

<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">

<dd>The parent axes for the widget.

</dd>

<dt>xy : (float, float)</dt>

<dd>Coordinates of the start of the lasso.

</dd>

<dt>callback : callable</dt>

<dd>Whenever the lasso is released, the <code class="xref py py-obj docutils literal notranslate">callback</code> function is called and

passed the vertices of the selected path.

</dd>

</dl>

</td>

</tr>

</tbody>

</table>

<code class="descname">onmove</code>(self, event)<a class="reference internal" href="../_modules/matplotlib/widgets.html#Lasso.onmove">[source]</a><a class="headerlink" href="#matplotlib.widgets.Lasso.onmove" title="Permalink to this definition">¶</a></dt>

<code class="descname">onrelease</code>(self, event)<a class="reference internal" href="../_modules/matplotlib/widgets.html#Lasso.onrelease">[source]</a><a class="headerlink" href="#matplotlib.widgets.Lasso.onrelease" title="Permalink to this definition">¶</a></dt>

</dd></dl>

class <code class="descclassname">matplotlib.widgets.</code><code class="descname">LassoSelector</code>(ax, onselect=None, useblit=True, lineprops=None, button=None)<a class="reference internal" href="../_modules/matplotlib/widgets.html#LassoSelector">[source]</a><a class="headerlink" href="#matplotlib.widgets.LassoSelector" title="Permalink to this definition">¶</a></dt>

<dd>Bases: <code class="xref py py-class docutils literal notranslate">matplotlib.widgets._SelectorWidget</code>

Selection curve of an arbitrary shape.

For the selector to remain responsive you must keep a reference to it.

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">contains_point</code></a>

to select data points from an image.

In contrast to <a class="reference internal" href="#matplotlib.widgets.Lasso" title="matplotlib.widgets.Lasso"><code class="xref py py-obj docutils literal notranslate">Lasso</code></a>, <a class="reference internal" href="#matplotlib.widgets.LassoSelector" title="matplotlib.widgets.LassoSelector"><code class="xref py py-obj docutils literal notranslate">LassoSelector</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">RectangleSelector</code></a> and <a class="reference internal" href="#matplotlib.widgets.SpanSelector" title="matplotlib.widgets.SpanSelector"><code class="xref py py-obj docutils literal notranslate">SpanSelector</code></a>, and will continue to

interact with the axes until disconnected.

Example usage:

<div class="highlight-default notranslate"><div class="highlight"><pre>ax = subplot(111)

ax.plot(x,y)

def onselect(verts):

print(verts)

lasso = LassoSelector(ax, onselect)

</pre></div>

</div>

<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">

<dd>The parent axes for the widget.

</dd>

<dt>onselect : function</dt>

<dd>Whenever the lasso is released, the onselect function is called and

passed the vertices of the selected path.

</dd>

<dt>button : List[Int], optional</dt>

<dd>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 <code class="docutils literal notranslate">None</code>, which does not limit

which button can be used.

Note, typically:

<li>1 = left mouse button</li>

<li>2 = center mouse button (scroll wheel)</li>

<li>3 = right mouse button</li>

</ul>

</dd>

</dl>

</td>

</tr>

</tbody>

</table>

<code class="descname">onpress</code>(self, event)<a class="reference internal" href="../_modules/matplotlib/widgets.html#LassoSelector.onpress">[source]</a><a class="headerlink" href="#matplotlib.widgets.LassoSelector.onpress" title="Permalink to this definition">¶</a></dt>

<code class="descname">onrelease</code>(self, event)<a class="reference internal" href="../_modules/matplotlib/widgets.html#LassoSelector.onrelease">[source]</a><a class="headerlink" href="#matplotlib.widgets.LassoSelector.onrelease" title="Permalink to this definition">¶</a></dt>

</dd></dl>

class <code class="descclassname">matplotlib.widgets.</code><code class="descname">LockDraw</code><a class="reference internal" href="../_modules/matplotlib/widgets.html#LockDraw">[source]</a><a class="headerlink" href="#matplotlib.widgets.LockDraw" title="Permalink to this definition">¶</a></dt>

<dd>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">object</code></a>

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">canvas.widgetlock(widget)</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).

<code class="descname">available</code>(self, o)<a class="reference internal" href="../_modules/matplotlib/widgets.html#LockDraw.available">[source]</a><a class="headerlink" href="#matplotlib.widgets.LockDraw.available" title="Permalink to this definition">¶</a></dt>

<dd>Return whether drawing is available to o.

</dd></dl>

<code class="descname">isowner</code>(self, o)<a class="reference internal" href="../_modules/matplotlib/widgets.html#LockDraw.isowner">[source]</a><a class="headerlink" href="#matplotlib.widgets.LockDraw.isowner" title="Permalink to this definition">¶</a></dt>

<dd>Return whether o owns this lock.

</dd></dl>

<code class="descname">locked</code>(self)<a class="reference internal" href="../_modules/matplotlib/widgets.html#LockDraw.locked">[source]</a><a class="headerlink" href="#matplotlib.widgets.LockDraw.locked" title="Permalink to this definition">¶</a></dt>

<dd>Return whether the lock is currently held by an owner.

</dd></dl>

<code class="descname">release</code>(self, o)<a class="reference internal" href="../_modules/matplotlib/widgets.html#LockDraw.release">[source]</a><a class="headerlink" href="#matplotlib.widgets.LockDraw.release" title="Permalink to this definition">¶</a></dt>

<dd>Release the lock from o.

</dd></dl>

class <code class="descclassname">matplotlib.widgets.</code><code class="descname">MultiCursor</code>(canvas, axes, useblit=True, horizOn=False, vertOn=True, **lineprops)<a class="reference internal" href="../_modules/matplotlib/widgets.html#MultiCursor">[source]</a><a class="headerlink" href="#matplotlib.widgets.MultiCursor" title="Permalink to this definition">¶</a></dt>

Provide a vertical (default) and/or horizontal line cursor shared between

multiple axes.

For the cursor to remain responsive you must keep a reference to

it.

Example usage:

<div class="highlight-default notranslate"><div class="highlight"><pre>from matplotlib.widgets import MultiCursor

import matplotlib.pyplot as plt

import numpy as np

fig, (ax1, ax2) = plt.subplots(nrows=2, sharex=True)

t = np.arange(0.0, 2.0, 0.01)

ax1.plot(t, np.sin(2*np.pi*t))

ax2.plot(t, np.sin(4*np.pi*t))

multi = MultiCursor(fig.canvas, (ax1, ax2), color='r', lw=1,

horizOn=False, vertOn=True)

plt.show()

</pre></div>

</div>

<code class="descname">clear</code>(self, event)<a class="reference internal" href="../_modules/matplotlib/widgets.html#MultiCursor.clear">[source]</a><a class="headerlink" href="#matplotlib.widgets.MultiCursor.clear" title="Permalink to this definition">¶</a></dt>

<dd>clear the cursor

</dd></dl>

<code class="descname">connect</code>(self)<a class="reference internal" href="../_modules/matplotlib/widgets.html#MultiCursor.connect">[source]</a><a class="headerlink" href="#matplotlib.widgets.MultiCursor.connect" title="Permalink to this definition">¶</a></dt>

<dd>connect events

</dd></dl>

<code class="descname">disconnect</code>(self)<a class="reference internal" href="../_modules/matplotlib/widgets.html#MultiCursor.disconnect">[source]</a><a class="headerlink" href="#matplotlib.widgets.MultiCursor.disconnect" title="Permalink to this definition">¶</a></dt>

<dd>disconnect events

</dd></dl>

<code class="descname">onmove</code>(self, event)<a class="reference internal" href="../_modules/matplotlib/widgets.html#MultiCursor.onmove">[source]</a><a class="headerlink" href="#matplotlib.widgets.MultiCursor.onmove" title="Permalink to this definition">¶</a></dt>

</dd></dl>

class <code class="descclassname">matplotlib.widgets.</code><code class="descname">PolygonSelector</code>(ax, onselect, useblit=False, lineprops=None, markerprops=None, vertex_select_radius=15)<a class="reference internal" href="../_modules/matplotlib/widgets.html#PolygonSelector">[source]</a><a class="headerlink" href="#matplotlib.widgets.PolygonSelector" title="Permalink to this definition">¶</a></dt>

<dd>Bases: <code class="xref py py-class docutils literal notranslate">matplotlib.widgets._SelectorWidget</code>

Select a polygon region of an axes.

Place vertices with each mouse click, and make the selection by completing

the polygon (clicking on the first vertex). Hold the ctrl key and click

and drag a vertex to reposition it (the ctrl key is not necessary if the

polygon has already been completed). Hold the shift key and click and

drag anywhere in the axes to move all vertices. Press the esc key to

start a new polygon.

For the selector to remain responsive you must keep a reference to

it.

<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">

<dd>The parent axes for the widget.

</dd>

<dt>onselect : function</dt>

<dd>When a polygon is completed or modified after completion,

the <code class="xref py py-obj docutils literal notranslate">onselect</code> function is called and passed a list of the vertices as

<code class="docutils literal notranslate">(xdata, ydata)</code> tuples.

</dd>

<dt>useblit : bool, optional</dt>

<dt>lineprops : dict, optional</dt>

<dd>The line for the sides of the polygon is drawn with the properties

given by <code class="xref py py-obj docutils literal notranslate">lineprops</code>. The default is <code class="docutils literal notranslate">dict(color='k', linestyle='-',

linewidth=2, alpha=0.5)</code>.

</dd>

<dt>markerprops : dict, optional</dt>

<dd>The markers for the vertices of the polygon are drawn with the

properties given by <code class="xref py py-obj docutils literal notranslate">markerprops</code>. The default is <code class="docutils literal notranslate">dict(marker='o',

markersize=7, mec='k', mfc='k', alpha=0.5)</code>.

</dd>

<dt>vertex_select_radius : float, optional</dt>

<dd>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">vertex_select_radius</code> pixels of the

vertex. The default radius is 15 pixels.

</dd>

</dl>

</td>

</tr>

</tbody>

</table>

Examples

<a class="reference internal" href="../gallery/widgets/polygon_selector_demo.html">Polygon Selector Demo</a>

<code class="descname">onmove</code>(self, event)<a class="reference internal" href="../_modules/matplotlib/widgets.html#PolygonSelector.onmove">[source]</a><a class="headerlink" href="#matplotlib.widgets.PolygonSelector.onmove" title="Permalink to this definition">¶</a></dt>

<dd>Cursor move event handler and validator

</dd></dl>

<code class="descname">verts</code><a class="headerlink" href="#matplotlib.widgets.PolygonSelector.verts" title="Permalink to this definition">¶</a></dt>

<dd>Get the polygon vertices.

<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body"><dl class="first last docutils">

<dd>A list of the vertices of the polygon as <code class="docutils literal notranslate">(xdata, ydata)</code> tuples.

</dd>

</dl>

</td>

</tr>

</tbody>

</table>

</dd></dl>

class <code class="descclassname">matplotlib.widgets.</code><code class="descname">RadioButtons</code>(ax, labels, active=0, activecolor='blue')<a class="reference internal" href="../_modules/matplotlib/widgets.html#RadioButtons">[source]</a><a class="headerlink" href="#matplotlib.widgets.RadioButtons" title="Permalink to this definition">¶</a></dt>

A GUI neutral radio button.

For the buttons to remain responsive you must keep a reference to this

object.

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">on_clicked()</code></a> method.

<tr class="field-odd field"><th class="field-name">Attributes:</th><td class="field-body"><dl class="first last docutils">

<dd>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">Axes</code></a> instance.

</dd>

<dt>activecolor</dt>

<dd>The color of the selected button.

</dd>

<dt>labels</dt>

<dd>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">Text</code></a> instances containing the button labels.

</dd>

<dt>circles</dt>

<dd>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">Circle</code></a> instances defining the buttons.

</dd>

<dt>value_selected : str</dt>

<dd>The label text of the currently selected button.

</dd>

</dl>

</td>

</tr>

</tbody>

</table>

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">Axes</code></a>.

<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">

<dd>The axes to add the buttons to.

</dd>

<dt>labels : list of str</dt>

<dd>The button labels.

</dd>

<dt>active : int</dt>

<dd>The index of the initially selected button.

</dd>

<dt>activecolor : color</dt>

<dd>The color of the selected button.

</dd>

</dl>

</td>

</tr>

</tbody>

</table>

<code class="descname">disconnect</code>(self, cid)<a class="reference internal" href="../_modules/matplotlib/widgets.html#RadioButtons.disconnect">[source]</a><a class="headerlink" href="#matplotlib.widgets.RadioButtons.disconnect" title="Permalink to this definition">¶</a></dt>

<dd>Remove the observer with connection id cid.

</dd></dl>

<code class="descname">on_clicked</code>(self, func)<a class="reference internal" href="../_modules/matplotlib/widgets.html#RadioButtons.on_clicked">[source]</a><a class="headerlink" href="#matplotlib.widgets.RadioButtons.on_clicked" title="Permalink to this definition">¶</a></dt>

<dd>Connect the callback function func to button click events.

Returns a connection id, which can be used to disconnect the callback.

</dd></dl>

<code class="descname">set_active</code>(self, index)<a class="reference internal" href="../_modules/matplotlib/widgets.html#RadioButtons.set_active">[source]</a><a class="headerlink" href="#matplotlib.widgets.RadioButtons.set_active" title="Permalink to this definition">¶</a></dt>

<dd>Select button with number index.

Callbacks will be triggered if <code class="xref py py-attr docutils literal notranslate">eventson</code> is True.

</dd></dl>

class <code class="descclassname">matplotlib.widgets.</code><code class="descname">RectangleSelector</code>(ax, onselect, drawtype='box', minspanx=None, minspany=None, useblit=False, lineprops=None, rectprops=None, spancoords='data', button=None, maxdist=10, marker_props=None, interactive=False, state_modifier_keys=None)<a class="reference internal" href="../_modules/matplotlib/widgets.html#RectangleSelector">[source]</a><a class="headerlink" href="#matplotlib.widgets.RectangleSelector" title="Permalink to this definition">¶</a></dt>

<dd>Bases: <code class="xref py py-class docutils literal notranslate">matplotlib.widgets._SelectorWidget</code>

Select a rectangular region of an axes.

For the cursor to remain responsive you must keep a reference to

it.

Example usage:

<div class="highlight-default notranslate"><div class="highlight"><pre>import numpy as np

import matplotlib.pyplot as plt

from matplotlib.widgets import RectangleSelector

def onselect(eclick, erelease):

"eclick and erelease are matplotlib events at press and release."

def toggle_selector(event):

print('Key pressed.')

if event.key in ['Q', 'q'] and toggle_selector.RS.active:

print('RectangleSelector deactivated.')

if event.key in ['A', 'a'] and not toggle_selector.RS.active:

print('RectangleSelector activated.')

y = np.sin(x)

ax.plot(x, y)

toggle_selector.RS = RectangleSelector(ax, onselect, drawtype='line')

plt.show()

</pre></div>

</div>

Create a selector in ax. When a selection is made, clear

the span and call onselect with:

</pre></div>

</div>

arrays of length 2 containing the x- and y-coordinate.

If minspanx is not None then events smaller than minspanx

in x direction are ignored (it's the same for y).

The rectangle is drawn with rectprops; default:

</pre></div>

</div>

The line is drawn with lineprops; default:

</pre></div>

</div>

Use drawtype if you want the mouse to draw a line,

a box or nothing between click and actual position by setting

Drawing a line would result in a line from vertex A to vertex C in

a rectangle ABCD.

spancoords is one of 'data' or 'pixels'. If 'data', minspanx

and minspanx will be interpreted in the same coordinates as

the x and y axis. If 'pixels', they are in pixels.

button 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 None,

which does not limit which button can be used.

<dt>Note, typically:</dt>

<dd>1 = left mouse button

2 = center mouse button (scroll wheel)

3 = right mouse button</dd>

</dl>

interactive will draw a set of handles and allow you interact

with the widget after it is drawn.

state_modifier_keys are keyboard modifiers that affect the behavior

of the widget.

The defaults are:

dict(move=' ', clear='escape', square='shift', center='ctrl')

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.

<code class="descname">center</code><a class="headerlink" href="#matplotlib.widgets.RectangleSelector.center" title="Permalink to this definition">¶</a></dt>

<dd>Center of rectangle

</dd></dl>

<code class="descname">corners</code><a class="headerlink" href="#matplotlib.widgets.RectangleSelector.corners" title="Permalink to this definition">¶</a></dt>

<dd>Corners of rectangle from lower left, moving clockwise.

</dd></dl>

<code class="descname">draw_shape</code>(self, extents)<a class="reference internal" href="../_modules/matplotlib/widgets.html#RectangleSelector.draw_shape">[source]</a><a class="headerlink" href="#matplotlib.widgets.RectangleSelector.draw_shape" title="Permalink to this definition">¶</a></dt>

<code class="descname">edge_centers</code><a class="headerlink" href="#matplotlib.widgets.RectangleSelector.edge_centers" title="Permalink to this definition">¶</a></dt>

<dd>Midpoint of rectangle edges from left, moving clockwise.

</dd></dl>

<code class="descname">extents</code><a class="headerlink" href="#matplotlib.widgets.RectangleSelector.extents" title="Permalink to this definition">¶</a></dt>

<dd>Return (xmin, xmax, ymin, ymax).

</dd></dl>

<code class="descname">geometry</code><a class="headerlink" href="#matplotlib.widgets.RectangleSelector.geometry" title="Permalink to this definition">¶</a></dt>

<dd>Returns numpy.ndarray of shape (2,5) containing

x (<code class="docutils literal notranslate">RectangleSelector.geometry[1,:]</code>) and

y (<code class="docutils literal notranslate">RectangleSelector.geometry[0,:]</code>)

coordinates of the four corners of the rectangle starting

and ending in the top left corner.

</dd></dl>

class <code class="descclassname">matplotlib.widgets.</code><code class="descname">Slider</code>(ax, label, valmin, valmax, valinit=0.5, valfmt='%1.2f', closedmin=True, closedmax=True, slidermin=None, slidermax=None, dragging=True, valstep=None, orientation='horizontal', **kwargs)<a class="reference internal" href="../_modules/matplotlib/widgets.html#Slider">[source]</a><a class="headerlink" href="#matplotlib.widgets.Slider" title="Permalink to this definition">¶</a></dt>

A slider representing a floating point range.

Create a slider from valmin to valmax in axes ax. 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">on_changed()</code></a> to connect to the slider event.

<tr class="field-odd field"><th class="field-name">Attributes:</th><td class="field-body"><dl class="first last docutils">

<dt>val : float</dt>

<dd>Slider value.

</dd>

</dl>

</td>

</tr>

</tbody>

</table>

<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><dl class="first last docutils">

<dd>The Axes to put the slider in.

</dd>

<dt>label : str</dt>

<dd>Slider label.

</dd>

<dt>valmin : float</dt>

<dd>The minimum value of the slider.

</dd>

<dt>valmax : float</dt>

<dd>The maximum value of the slider.

</dd>

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