python matplotlib의 plot 사용시 naviationtool bar 사용

gistfile1.txt

## https://stackoverflow.com/questions/14896580/matplotlib-hooking-in-to-home-back-forward-button-events/15109266
## https://www.csie.ntu.edu.tw/~azarc/sna/matplotlib/lib/matplotlib/backend_bases.py

import matplotlib.pyplot as plt
from matplotlib.backend_bases import NavigationToolbar2, Event

home    = NavigationToolbar2.home
back    = NavigationToolbar2.back
forward = NavigationToolbar2.forward

def new_home(self, *args, **kwargs):
    s = 'home_event'
    event = Event(s, self)
    event.foo = 100
    self.canvas.callbacks.process(s, event)
    home(self, *args, **kwargs)

def new_back(self, *args, **kwargs):
    s = 'back_event'
    event = Event(s, self)
    event.foo = 100
    self.canvas.callbacks.process(s, event)
    back(self, *args, **kwargs)

def new_forward(self, *args, **kwargs):
    s = 'forward_event'
    event = Event(s, self)
    event.foo = 100
    self.canvas.callbacks.process(s, event)
    forward(self, *args, **kwargs)


NavigationToolbar2.home    = new_home
NavigationToolbar2.back    = new_back
NavigationToolbar2.forward = new_forward

def handle_home(evt):
    print 'new home'
    print evt.foo

fig = plt.figure()
fig.canvas.mpl_connect('home_event', handle_home)
fig.canvas.mpl_connect('back_event', handle_home)
fig.canvas.mpl_connect('forward_event', handle_home)
plt.text(0.35, 0.5, 'Hello world!', dict(size=30))
plt.show()