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"""
demonstrate NavigationToolbar with GTK3 accessed via pygobject
"""
from gi.repository import Gtk
from matplotlib.figure import Figure
from numpy import arange, sin, pi
from matplotlib.backends.backend_gtk3agg import FigureCanvasGTK3Agg as FigureCanvas
from matplotlib.backends.backend_gtk3 import NavigationToolbar2GTK3 as NavigationToolbar
win = Gtk.Window()
win.connect("delete-event", Gtk.main_quit)
win.set_default_size(400, 300)
win.set_title("Embedding in GTK")
f = Figure(figsize=(5, 4), dpi=100)
a = f.add_subplot(1, 1, 1)
t = arange(0.0, 3.0, 0.01)
s = sin(2*pi*t)
a.plot(t, s)
vbox = Gtk.VBox()
win.add(vbox)
# Add canvas to vbox
canvas = FigureCanvas(f) # a Gtk.DrawingArea
vbox.pack_start(canvas, True, True, 0)
# Create toolbar
toolbar = NavigationToolbar(canvas, win)
vbox.pack_start(toolbar, False, False, 0)
win.show_all()
Gtk.main()
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