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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 3.3.2 documentation</title>

title="Search within Matplotlib 3.3.2 documentation"

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

</head><body>

<div id="unreleased-message"> You are reading an old version of the documentation (v3.3.2). 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 3.3.2</div>

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Note

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

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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-default 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:

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="matplotlib.colors.to_rgba" class="sphx-glr-backref-module-matplotlib-colors sphx-glr-backref-type-py-function">colors.to_rgba</a>(labelcolor)[:3]

self.bgcolor_rgb = <a href="../../api/_as_gen/matplotlib.colors.to_rgba.html#matplotlib.colors.to_rgba" title="matplotlib.colors.to_rgba" class="sphx-glr-backref-module-matplotlib-colors sphx-glr-backref-type-py-function">colors.to_rgba</a>(bgcolor)[:3]

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>):

parser = <a href="../../api/mathtext_api.html#matplotlib.mathtext.MathTextParser" title="matplotlib.mathtext.MathTextParser" class="sphx-glr-backref-module-matplotlib-mathtext sphx-glr-backref-type-py-class">mathtext.MathTextParser</a>("Bitmap")

padx = 5

pady = 5

def __init__(self, <a href="../../api/_as_gen/matplotlib.figure.Figure.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):

<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>.__init__(self)

self.set_figure(<a href="../../api/_as_gen/matplotlib.figure.Figure.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

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=<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>, dpi=<a href="../../api/_as_gen/matplotlib.figure.Figure.html#matplotlib.figure.Figure.dpi" title="matplotlib.figure.Figure.dpi" class="sphx-glr-backref-module-matplotlib-figure sphx-glr-backref-type-py-method">fig.dpi</a>)

if <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> != <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">hoverprops.fontsize</a>:

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="numpy.zeros" class="sphx-glr-backref-module-numpy sphx-glr-backref-type-py-function">np.zeros</a>((x.shape[0], x.shape[1], 4))

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

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/image_api.html#matplotlib.image.FigureImage" title="matplotlib.image.FigureImage" class="sphx-glr-backref-module-matplotlib-image sphx-glr-backref-type-py-class">image.FigureImage</a>(<a href="../../api/_as_gen/matplotlib.figure.Figure.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>, origin='upper')

# we'll update these later

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)

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, 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.hover = False

def draw(self, renderer):

self.rect.draw(renderer)

def set_hover_props(self, b):

if b:

props = self.hoverprops

else:

props = self.props

r, g, b = <a href="https://docs.python.org/3/library/stdtypes.html#tuple" title="builtins.tuple" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">props.labelcolor_rgb</a>

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

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

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

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, junk = 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/_as_gen/matplotlib.figure.Figure.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/_as_gen/matplotlib.figure.Figure.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/functions.html#bool" title="builtins.bool" class="sphx-glr-backref-module-builtins sphx-glr-backref-type-py-class sphx-glr-backref-instance">fig.suppressComposite</a> = True

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>

self.numitems = len(<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="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">item.labelwidth</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="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">item.labelheight</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)

<a href="../../api/_as_gen/matplotlib.figure.Figure.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):

draw = False

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>:

draw = item.set_hover(event)

if draw:

self.figure.canvas.draw()

break

<a href="../../api/_as_gen/matplotlib.figure.Figure.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/_as_gen/matplotlib.figure.Figure.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/_as_gen/matplotlib.figure.Figure.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/_as_gen/matplotlib.figure.Figure.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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