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animation_blit_gtk.py

#!/usr/bin/env python

# For detailed comments on animation and the techniques used here, see
# the wiki entry
# http://www.scipy.org/wikis/topical_software/MatplotlibAnimation
import time

import gtk, gobject

import matplotlib
matplotlib.use('GTKAgg')

import numpy as np
import matplotlib.pyplot as plt


fig = plt.figure()
ax = fig.add_subplot(111)
canvas = fig.canvas

fig.subplots_adjust(left=0.3, bottom=0.3) # check for flipy bugs
ax.grid() # to ensure proper background restore

# create the initial line
x = np.arange(0,2*np.pi,0.01)
line, = ax.plot(x, np.sin(x), animated=True, lw=2)
canvas.draw()

# for profiling
tstart = time.time()

def update_line(*args):
    print 'you are here', update_line.cnt
    if update_line.background is None:
        update_line.background = canvas.copy_from_bbox(ax.bbox)

    # restore the clean slate background
    canvas.restore_region(update_line.background)
    # update the data
    line.set_ydata(np.sin(x+update_line.cnt/10.0))
    # just draw the animated artist
    ax.draw_artist(line)

    # just redraw the axes rectangle
    canvas.blit(ax.bbox)

    if update_line.cnt==1000:
        # print the timing info and quit
        print 'FPS:' , 1000/(time.time()-tstart)
        gtk.mainquit()
        raise SystemExit

    update_line.cnt += 1
    return True

update_line.cnt = 0
update_line.background = None


def start_anim(event):
    gobject.idle_add(update_line)
    canvas.mpl_disconnect(start_anim.cid)

start_anim.cid = canvas.mpl_connect('draw_event', start_anim)



plt.show()

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