matplotlib.github.com/3.4.2/gallery/widgets/menu.html at main · matplotlib/matplotlib.github.com

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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>Menu — Matplotlib 3.4.2 documentation</title>

title="Search within Matplotlib 3.4.2 documentation"

href="../../_static/opensearch.xml"/>

</head><body>

<div id="unreleased-message"> You are reading an old version of the documentation (v3.4.2). For the latest version see <a href="https://matplotlib.org/stable/gallery/widgets/menu.html">https://matplotlib.org/stable/gallery/widgets/menu.html</a></div>

<!--

</div>

-->

<div style="float: left; position: absolute; width: 496px; bottom: 0; padding-bottom: 24px">Version 3.4.2</div>

<div id="forkongithub"><a href="https://github.com/matplotlib/matplotlib">Fork me on GitHub</a></div>

</div>

<ul>

<li><a href="../../users/installing.html">Installation</a></li>

<li><a href="../../contents.html">Documentation</a></li>

<li><a href="../index.html">Examples</a></li>

<li><a href="../../tutorials/index.html">Tutorials</a></li>

<li><a href="../../devel/index.html">Contributing</a></li>

</form>

</li>

</ul>

</nav>

<h3>Navigation</h3>

<ul>

<a href="../../genindex.html" title="General Index"

accesskey="I">index</a></li>

<a href="../../py-modindex.html" title="Python Module Index"

>modules</a> |</li>

<li><a href="../../contents.html">contents</a> »</li>

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</div>

<div id="sidebar-pagesource" role="note" aria-label="source link"

style="margin-top: 1.5em; padding-top: 0.1em; border-top: 1px solid #86989b">

<a href="../../_sources/gallery/widgets/menu.rst.txt"

style="color: #c0c0c0" rel="nofollow">Show Page Source</a>

</div>

Note

Click <a class="reference internal" href="#sphx-glr-download-gallery-widgets-menu-py">here</a> to download the full example code

</div>

<div class="highlight-default notranslate"><div class="highlight"><pre>import matplotlib.artist as artist

import matplotlib.patches as patches

import matplotlib.pyplot as plt

from matplotlib.transforms import <a href="../../api/transformations.html#matplotlib.transforms.IdentityTransform" title="matplotlib.transforms.IdentityTransform" class="sphx-glr-backref-module-matplotlib-transforms sphx-glr-backref-type-py-class">IdentityTransform</a>

class ItemProperties:

def __init__(self, fontsize=14, labelcolor='black', bgcolor='yellow',

alpha=1.0):

self.fontsize = fontsize

self.labelcolor = labelcolor

self.bgcolor = bgcolor

self.alpha = alpha

class MenuItem(<a href="../../api/artist_api.html#matplotlib.artist.Artist" title="matplotlib.artist.Artist" class="sphx-glr-backref-module-matplotlib-artist sphx-glr-backref-type-py-class">artist.Artist</a>):

padx = 5

pady = 5

def __init__(self, <a href="../../api/figure_api.html#matplotlib.figure.Figure" title="matplotlib.figure.Figure" class="sphx-glr-backref-module-matplotlib-figure sphx-glr-backref-type-py-class sphx-glr-backref-instance">fig</a>, labelstr, props=None, hoverprops=None,

on_select=None):

super().__init__()

self.set_figure(<a href="../../api/figure_api.html#matplotlib.figure.Figure" title="matplotlib.figure.Figure" class="sphx-glr-backref-module-matplotlib-figure sphx-glr-backref-type-py-class sphx-glr-backref-instance">fig</a>)

self.labelstr = labelstr

self.props = props if props is not None else ItemProperties()

self.hoverprops = (

hoverprops if hoverprops is not None else ItemProperties())

if self.<a href="https://docs.python.org/3/library/functions.html#int" title="builtins.int" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">props.fontsize</a> != self.hoverprops.fontsize:

raise NotImplementedError(

'support for different font sizes not implemented')

self.on_select = on_select

# Setting the transform to IdentityTransform() lets us specify

# coordinates directly in pixels.

self.<a href="https://docs.python.org/3/library/stdtypes.html#str" title="builtins.str" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">label</a> = <a href="../../api/figure_api.html#matplotlib.figure.Figure.text" title="matplotlib.figure.Figure.text" class="sphx-glr-backref-module-matplotlib-figure sphx-glr-backref-type-py-method">fig.text</a>(0, 0, labelstr, transform=<a href="../../api/transformations.html#matplotlib.transforms.IdentityTransform" title="matplotlib.transforms.IdentityTransform" class="sphx-glr-backref-module-matplotlib-transforms sphx-glr-backref-type-py-class">IdentityTransform</a>(),

size=<a href="https://docs.python.org/3/library/functions.html#int" title="builtins.int" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">props.fontsize</a>)

self.text_bbox = self.<a href="https://docs.python.org/3/library/stdtypes.html#str" title="builtins.str" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">label</a>.get_window_extent(

<a href="../../api/backend_agg_api.html#matplotlib.backends.backend_agg.FigureCanvasAgg.get_renderer" title="matplotlib.backends.backend_agg.FigureCanvasAgg.get_renderer" class="sphx-glr-backref-module-matplotlib-backends-backend_agg sphx-glr-backref-type-py-method">fig.canvas.get_renderer</a>())

self.rect = <a href="../../api/_as_gen/matplotlib.patches.Rectangle.html#matplotlib.patches.Rectangle" title="matplotlib.patches.Rectangle" class="sphx-glr-backref-module-matplotlib-patches sphx-glr-backref-type-py-class">patches.Rectangle</a>((0, 0), 1, 1) # Will be updated later.

self.set_hover_props(False)

<a href="../../api/backend_bases_api.html#matplotlib.backend_bases.FigureCanvasBase.mpl_connect" title="matplotlib.backend_bases.FigureCanvasBase.mpl_connect" class="sphx-glr-backref-module-matplotlib-backend_bases sphx-glr-backref-type-py-method">fig.canvas.mpl_connect</a>('button_release_event', self.check_select)

def check_select(self, event):

over, _ = self.rect.contains(event)

if not over:

return

if self.on_select is not None:

self.on_select(self)

def set_extent(self, x, y, w, h, depth):

self.rect.set(x=x, y=y, width=w, height=h)

self.<a href="https://docs.python.org/3/library/stdtypes.html#str" title="builtins.str" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">label</a>.set(position=(x + self.padx, y + depth + self.pady/2))

self.hover = False

def draw(self, renderer):

self.rect.draw(renderer)

def set_hover_props(self, b):

props = self.hoverprops if b else self.props

self.rect.set(facecolor=<a href="https://docs.python.org/3/library/stdtypes.html#str" title="builtins.str" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">props.bgcolor</a>, alpha=<a href="https://docs.python.org/3/library/functions.html#float" title="builtins.float" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">props.alpha</a>)

def set_hover(self, event):

"""

Update the hover status of event and return whether it was changed.

"""

b, _ = self.rect.contains(event)

changed = (b != self.hover)

if changed:

self.set_hover_props(b)

self.hover = b

return changed

class Menu:

def __init__(self, <a href="../../api/figure_api.html#matplotlib.figure.Figure" title="matplotlib.figure.Figure" class="sphx-glr-backref-module-matplotlib-figure sphx-glr-backref-type-py-class sphx-glr-backref-instance">fig</a>, <a href="https://docs.python.org/3/library/stdtypes.html#list" title="builtins.list" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">menuitems</a>):

self.figure = <a href="../../api/figure_api.html#matplotlib.figure.Figure" title="matplotlib.figure.Figure" class="sphx-glr-backref-module-matplotlib-figure sphx-glr-backref-type-py-class sphx-glr-backref-instance">fig</a>

self.<a href="https://docs.python.org/3/library/stdtypes.html#list" title="builtins.list" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">menuitems</a> = <a href="https://docs.python.org/3/library/stdtypes.html#list" title="builtins.list" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">menuitems</a>

maxw = max(<a href="../../api/transformations.html#matplotlib.transforms.BboxBase.width" title="matplotlib.transforms.BboxBase.width" class="sphx-glr-backref-module-matplotlib-transforms sphx-glr-backref-type-py-method">item.text_bbox.width</a> for item in <a href="https://docs.python.org/3/library/stdtypes.html#list" title="builtins.list" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">menuitems</a>)

maxh = max(<a href="../../api/transformations.html#matplotlib.transforms.BboxBase.height" title="matplotlib.transforms.BboxBase.height" class="sphx-glr-backref-module-matplotlib-transforms sphx-glr-backref-type-py-method">item.text_bbox.height</a> for item in <a href="https://docs.python.org/3/library/stdtypes.html#list" title="builtins.list" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">menuitems</a>)

depth = max(-<a href="../../api/transformations.html#matplotlib.transforms.Bbox.y0" title="matplotlib.transforms.Bbox.y0" class="sphx-glr-backref-module-matplotlib-transforms sphx-glr-backref-type-py-method">item.text_bbox.y0</a> for item in <a href="https://docs.python.org/3/library/stdtypes.html#list" title="builtins.list" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">menuitems</a>)

x0 = 100

y0 = 400

width = maxw + 2*<a href="https://docs.python.org/3/library/functions.html#int" title="builtins.int" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">MenuItem.padx</a>

height = maxh + <a href="https://docs.python.org/3/library/functions.html#int" title="builtins.int" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">MenuItem.pady</a>

for item in <a href="https://docs.python.org/3/library/stdtypes.html#list" title="builtins.list" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">menuitems</a>:

left = x0

bottom = y0 - maxh - <a href="https://docs.python.org/3/library/functions.html#int" title="builtins.int" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">MenuItem.pady</a>

item.set_extent(left, bottom, width, height, depth)

<a href="../../api/figure_api.html#matplotlib.figure.Figure" title="matplotlib.figure.Figure" class="sphx-glr-backref-module-matplotlib-figure sphx-glr-backref-type-py-class sphx-glr-backref-instance">fig</a>.artists.append(item)

y0 -= maxh + <a href="https://docs.python.org/3/library/functions.html#int" title="builtins.int" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">MenuItem.pady</a>

<a href="../../api/backend_bases_api.html#matplotlib.backend_bases.FigureCanvasBase.mpl_connect" title="matplotlib.backend_bases.FigureCanvasBase.mpl_connect" class="sphx-glr-backref-module-matplotlib-backend_bases sphx-glr-backref-type-py-method">fig.canvas.mpl_connect</a>('motion_notify_event', self.on_move)

def on_move(self, event):

if any(item.set_hover(event) for item in self.<a href="https://docs.python.org/3/library/stdtypes.html#list" title="builtins.list" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">menuitems</a>):

self.figure.canvas.draw()

<a href="../../api/figure_api.html#matplotlib.figure.Figure" title="matplotlib.figure.Figure" class="sphx-glr-backref-module-matplotlib-figure sphx-glr-backref-type-py-class sphx-glr-backref-instance">fig</a> = <a href="../../api/_as_gen/matplotlib.pyplot.figure.html#matplotlib.pyplot.figure" title="matplotlib.pyplot.figure" class="sphx-glr-backref-module-matplotlib-pyplot sphx-glr-backref-type-py-function">plt.figure</a>()

<a href="../../api/figure_api.html#matplotlib.figure.Figure.subplots_adjust" title="matplotlib.figure.Figure.subplots_adjust" class="sphx-glr-backref-module-matplotlib-figure sphx-glr-backref-type-py-method">fig.subplots_adjust</a>(left=0.3)

props = ItemProperties(labelcolor='black', bgcolor='yellow',

fontsize=15, alpha=0.2)

hoverprops = ItemProperties(labelcolor='white', bgcolor='blue',

<a href="https://docs.python.org/3/library/stdtypes.html#list" title="builtins.list" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">menuitems</a> = []

for <a href="https://docs.python.org/3/library/stdtypes.html#str" title="builtins.str" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">label</a> in ('open', 'close', 'save', 'save as', 'quit'):

def on_select(item):

print('you selected %s' % <a href="https://docs.python.org/3/library/stdtypes.html#str" title="builtins.str" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">item.labelstr</a>)

item = <a href="../../api/artist_api.html#matplotlib.artist.Artist" title="matplotlib.artist.Artist" class="sphx-glr-backref-module-matplotlib-artist sphx-glr-backref-type-py-class">MenuItem</a>(<a href="../../api/figure_api.html#matplotlib.figure.Figure" title="matplotlib.figure.Figure" class="sphx-glr-backref-module-matplotlib-figure sphx-glr-backref-type-py-class sphx-glr-backref-instance">fig</a>, <a href="https://docs.python.org/3/library/stdtypes.html#str" title="builtins.str" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">label</a>, props=props, hoverprops=hoverprops,

on_select=on_select)

<a href="https://docs.python.org/3/library/stdtypes.html#list" title="builtins.list" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">menuitems</a>.append(item)

menu = Menu(<a href="../../api/figure_api.html#matplotlib.figure.Figure" title="matplotlib.figure.Figure" class="sphx-glr-backref-module-matplotlib-figure sphx-glr-backref-type-py-class sphx-glr-backref-instance">fig</a>, <a href="https://docs.python.org/3/library/stdtypes.html#list" title="builtins.list" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">menuitems</a>)

<a href="../../api/_as_gen/matplotlib.pyplot.show.html#matplotlib.pyplot.show" title="matplotlib.pyplot.show" class="sphx-glr-backref-module-matplotlib-pyplot sphx-glr-backref-type-py-function">plt.show</a>()

</pre></div>

</div>

<a class="reference download internal" download="" href="../../_downloads/1d795d2dbb3742249ef04dbbdc524568/menu.py"><code class="xref download docutils literal notranslate">Download Python source code: menu.py</code></a></div>

<a class="reference download internal" download="" href="../../_downloads/7fbe9039d13629f10dcf40d2c3d4986e/menu.ipynb"><code class="xref download docutils literal notranslate">Download Jupyter notebook: menu.ipynb</code></a></div>

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Keywords: matplotlib code example, codex, python plot, pyplot

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Last updated on May 08, 2021.

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