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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 3.0.0 documentation</title>

type="text/css" />

type="text/css" />

var DOCUMENTATION_OPTIONS = {

URL_ROOT: '../../',

VERSION: '3.0.0',

COLLAPSE_INDEX: false,

FILE_SUFFIX: '.html',

HAS_SOURCE: true,

SOURCELINK_SUFFIX: '.txt'

};

</script>

title="Search within Matplotlib 3.0.0 documentation"

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

</head>

<body>

<div id="unreleased-message"> You are reading an old version of the documentation (v3.0.0). 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 style="float: left; position: absolute; width: 496px; bottom: 0; padding-bottom: 24px">Version 3.0.0</div>

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

</div>

<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="../index.html">examples</a>| </li>

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

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<ul>

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

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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>

Out:

<div class="sphx-glr-script-out highlight-none notranslate"><div class="highlight"><pre>100 371 91 29

100 342 91 29

100 313 91 29

100 284 91 29

100 255 91 29

</pre></div>

</div>

</div>

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

import matplotlib.colors as colors

import matplotlib.patches as patches

import matplotlib.mathtext as mathtext

import matplotlib.pyplot as plt

import matplotlib.artist as artist

import matplotlib.image as image

class ItemProperties(object):

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

alpha=1.0):

self.fontsize = fontsize

self.labelcolor = labelcolor

self.bgcolor = bgcolor

self.alpha = alpha

self.labelcolor_rgb = <a href="../../api/_as_gen/matplotlib.colors.to_rgba.html#matplotlib.colors.to_rgba" title="View documentation for matplotlib.colors.to_rgba">colors.to_rgba</a>(labelcolor)[:3]

self.bgcolor_rgb = <a href="../../api/_as_gen/matplotlib.colors.to_rgba.html#matplotlib.colors.to_rgba" title="View documentation for matplotlib.colors.to_rgba">colors.to_rgba</a>(bgcolor)[:3]

class MenuItem(<a href="../../api/artist_api.html#matplotlib.artist.Artist" title="View documentation for matplotlib.artist.Artist">artist.Artist</a>):

parser = <a href="../../api/mathtext_api.html#matplotlib.mathtext.MathTextParser" title="View documentation for matplotlib.mathtext.MathTextParser">mathtext.MathTextParser</a>("Bitmap")

padx = 5

pady = 5

def __init__(self, fig, labelstr, props=None, hoverprops=None,

on_select=None):

<a href="../../api/artist_api.html#matplotlib.artist.Artist" title="View documentation for matplotlib.artist.Artist">artist.Artist</a>.__init__(self)

self.set_figure(fig)

self.labelstr = labelstr

if props is None:

props = ItemProperties()

if hoverprops is None:

hoverprops = ItemProperties()

self.props = props

self.hoverprops = hoverprops

self.on_select = on_select

x, self.depth = self.parser.to_mask(

labelstr, fontsize=props.fontsize, dpi=fig.dpi)

if props.fontsize != hoverprops.fontsize:

raise NotImplementedError(

'support for different font sizes not implemented')

self.labelwidth = x.shape[1]

self.labelheight = x.shape[0]

self.labelArray = <a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.zeros.html#numpy.zeros" title="View documentation for numpy.zeros">np.zeros</a>((x.shape[0], x.shape[1], 4))

self.labelArray[:, :, -1] = x/255.

self.label = <a href="../../api/image_api.html#matplotlib.image.FigureImage" title="View documentation for matplotlib.image.FigureImage">image.FigureImage</a>(fig, origin='upper')

self.label.set_array(self.labelArray)

# we'll update these later

self.rect = <a href="../../api/_as_gen/matplotlib.patches.Rectangle.html#matplotlib.patches.Rectangle" title="View documentation for matplotlib.patches.Rectangle">patches.Rectangle</a>((0, 0), 1, 1)

self.set_hover_props(False)

fig.canvas.mpl_connect('button_release_event', self.check_select)

def check_select(self, event):

over, junk = 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):

print(x, y, w, h)

self.rect.set_x(x)

self.rect.set_y(y)

self.rect.set_width(w)

self.rect.set_height(h)

self.label.ox = x + self.padx

self.label.oy = y - self.depth + self.pady/2.

self.hover = False

def draw(self, renderer):

self.rect.draw(renderer)

self.label.draw(renderer)

def set_hover_props(self, b):

if b:

props = self.hoverprops

else:

props = self.props

r, g, b = props.labelcolor_rgb

self.labelArray[:, :, 0] = r

self.labelArray[:, :, 1] = g

self.labelArray[:, :, 2] = b

self.rect.set(facecolor=props.bgcolor, alpha=props.alpha)

def set_hover(self, event):

'check the hover status of event and return true if status is changed'

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

changed = (b != self.hover)

if changed:

self.set_hover_props(b)

self.hover = b

return changed

class Menu(object):

self.figure = fig

fig.suppressComposite = True

self.menuitems = menuitems

self.numitems = len(menuitems)

maxw = max(item.labelwidth for item in menuitems)

maxh = max(item.labelheight for item in menuitems)

totalh = self.numitems*maxh + (self.numitems + 1)*2*MenuItem.pady

x0 = 100

y0 = 400

width = maxw + 2*MenuItem.padx

height = maxh + MenuItem.pady

for item in menuitems:

left = x0

bottom = y0 - maxh - MenuItem.pady

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

fig.artists.append(item)

y0 -= maxh + MenuItem.pady

fig.canvas.mpl_connect('motion_notify_event', self.on_move)

def on_move(self, event):

draw = False

for item in self.menuitems:

draw = item.set_hover(event)

if draw:

self.figure.canvas.draw()

break

fig = <a href="../../api/_as_gen/matplotlib.pyplot.figure.html#matplotlib.pyplot.figure" title="View documentation for matplotlib.pyplot.figure">plt.figure</a>()

fig.subplots_adjust(left=0.3)

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

fontsize=15, alpha=0.2)

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

menuitems = []

for label in ('open', 'close', 'save', 'save as', 'quit'):

def on_select(item):

print('you selected %s' % item.labelstr)

item = MenuItem(fig, label, props=props, hoverprops=hoverprops,

on_select=on_select)

menuitems.append(item)

menu = Menu(fig, menuitems)

<a href="../../api/_as_gen/matplotlib.pyplot.show.html#matplotlib.pyplot.show" title="View documentation for matplotlib.pyplot.show">plt.show</a>()

</pre></div>

</div>

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

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

</div>

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

<a class="reference external" href="https://sphinx-gallery.readthedocs.io">Gallery generated by Sphinx-Gallery</a>

</div>

</div>

Last updated on Sep 21, 2018.

Created using

<a href="http://sphinx-doc.org/">Sphinx</a> 1.7.9.

Doc version v3.0.0-12-gea132530f.

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