matplotlib example test backend (snippet)

Python matplotlib example 'test backend'

Functions in program:

def callback(instance):
def autolabel(rects):
def close(event):
def figure_leave(event):
def figure_enter(event):
def scroll(event):
def resize(event):
def motionnotify(event):
def keyup(event):
def keypress(event):
def release(event):
def press(event):

Modules used in program:

import matplotlib.pyplot as plt
import numpy as np
import matplotlib

python test backend

Python matplotlib example: test backend

import matplotlib
matplotlib.use('module://kivy.garden.matplotlib.backend_kivy')
from matplotlib.figure import Figure
from numpy import arange, sin, pi
from kivy.app import App

import numpy as np
from kivy.garden.matplotlib.backend_kivyagg import FigureCanvas,\
                                                NavigationToolbar2Kivy
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.boxlayout import BoxLayout
from matplotlib.transforms import Bbox
from kivy.uix.button import Button
from kivy.graphics import Color, Line, Rectangle

import matplotlib.pyplot as plt


def press(event):
    print('press released from test', event.x, event.y, event.button)


def release(event):
    print('release released from test', event.x, event.y, event.button)


def keypress(event):
    print('key down', event.key)


def keyup(event):
    print('key up', event.key)


def motionnotify(event):
    print('mouse move to ', event.x, event.y)


def resize(event):
    print('resize from mpl ', event)


def scroll(event):
    print('scroll event from mpl ', event.x, event.y, event.step)


def figure_enter(event):
    print('figure enter mpl')


def figure_leave(event):
    print('figure leaving mpl')


def close(event):
    print('closing figure')

N = 5
menMeans = (20, 35, 30, 35, 27)
menStd = (2, 3, 4, 1, 2)

ind = np.arange(N)  # the x locations for the groups
width = 0.35       # the width of the bars

fig, ax = plt.subplots()
fig2, ax2 = plt.subplots()
rects1 = ax.bar(ind, menMeans, width, color='r', yerr=menStd)

womenMeans = (25, 32, 34, 20, 25)
womenStd = (3, 5, 2, 3, 3)
rects2 = ax.bar(ind + width, womenMeans, width, color='y', yerr=womenStd)

# add some text for labels, title and axes ticks
ax.set_ylabel('Scores')
ax.set_title('Scores by group and gender')
ax.set_xticks(ind + width)
ax.set_xticklabels(('G1', 'G2', 'G3', 'G4', 'G5'))
ax.legend((rects1[0], rects2[0]), ('Men', 'Women'))

rects2 = ax2.bar(ind + width, womenMeans, width, color='y', yerr=womenStd)


def autolabel(rects):
    # attach some text labels
    for rect in rects:
        height = rect.get_height()
        ax.text(rect.get_x() + rect.get_width() / 2., 1.05 * height,
                '%d' % int(height), ha='center', va='bottom')

fig.canvas.mpl_connect('button_press_event', press)
fig.canvas.mpl_connect('button_release_event', release)
fig.canvas.mpl_connect('key_press_event', keypress)
fig.canvas.mpl_connect('key_release_event', keyup)
fig.canvas.mpl_connect('motion_notify_event', motionnotify)
fig.canvas.mpl_connect('resize_event', resize)
fig.canvas.mpl_connect('scroll_event', scroll)
fig.canvas.mpl_connect('figure_enter_event', figure_enter)
fig.canvas.mpl_connect('figure_leave_event', figure_leave)
fig.canvas.mpl_connect('close_event', close)

fig2.canvas.mpl_connect('button_press_event', press)
fig2.canvas.mpl_connect('button_release_event', release)
fig2.canvas.mpl_connect('key_press_event', keypress)
fig2.canvas.mpl_connect('key_release_event', keyup)
fig2.canvas.mpl_connect('motion_notify_event', motionnotify)
fig2.canvas.mpl_connect('resize_event', resize)
fig2.canvas.mpl_connect('scroll_event', scroll)
fig2.canvas.mpl_connect('figure_enter_event', figure_enter)
fig2.canvas.mpl_connect('figure_leave_event', figure_leave)
fig2.canvas.mpl_connect('close_event', close)

canvas = fig.canvas
# canvas.blit(Bbox(np.array([[0, 0], [400, 400]], np.int32)))
canvas2 = fig2.canvas

fl = BoxLayout(orientation="vertical")

def callback(instance):
    fl.remove_widget(canvas)
#     autolabel(rects1)
#     autolabel(rects2)
#     canvas.draw()


class MatplotlibTest(App):
    title = 'Matplotlib Test'

    def build(self):
        a = Button(text="press me", height=40, size_hint_y=None)
        a.bind(on_press=callback)
        nav1 = NavigationToolbar2Kivy(canvas)
        nav2 = NavigationToolbar2Kivy(canvas2)
        fl.add_widget(nav1.actionbar)
        fl.add_widget(canvas)
        fl.add_widget(nav2.actionbar)
        fl.add_widget(canvas2)
        fl.add_widget(a)
        return fl

if __name__ == '__main__':
    MatplotlibTest().run()

Python links

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