.. _user_interfaces-embedding_in_tk:

user_interfaces example code: embedding_in_tk.py
================================================

[`source code <embedding_in_tk.py>`_]

::

    #!/usr/bin/env python
    
    import matplotlib
    matplotlib.use('TkAgg')
    
    from numpy import arange, sin, pi
    from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg
    # implement the default mpl key bindings
    from matplotlib.backend_bases import key_press_handler
    
    
    from matplotlib.figure import Figure
    
    import sys
    if sys.version_info[0] < 3:
        import Tkinter as Tk
    else:
        import tkinter as Tk
    
    root = Tk.Tk()
    root.wm_title("Embedding in TK")
    
    
    f = Figure(figsize=(5,4), dpi=100)
    a = f.add_subplot(111)
    t = arange(0.0,3.0,0.01)
    s = sin(2*pi*t)
    
    a.plot(t,s)
    
    
    # a tk.DrawingArea
    canvas = FigureCanvasTkAgg(f, master=root)
    canvas.show()
    canvas.get_tk_widget().pack(side=Tk.TOP, fill=Tk.BOTH, expand=1)
    
    toolbar = NavigationToolbar2TkAgg( canvas, root )
    toolbar.update()
    canvas._tkcanvas.pack(side=Tk.TOP, fill=Tk.BOTH, expand=1)
    
    def on_key_event(event):
        print('you pressed %s'%event.key)
        key_press_handler(event, canvas, toolbar)
    
    canvas.mpl_connect('key_press_event', on_key_event)
    
    def _quit():
        root.quit()     # stops mainloop
        root.destroy()  # this is necessary on Windows to prevent
                        # Fatal Python Error: PyEval_RestoreThread: NULL tstate
    
    button = Tk.Button(master=root, text='Quit', command=_quit)
    button.pack(side=Tk.BOTTOM)
    
    Tk.mainloop()
    # If you put root.destroy() here, it will cause an error if
    # the window is closed with the window manager.
    
    
    

Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)