.. _pylab_examples-coords_demo:

pylab_examples example code: coords_demo.py
===========================================



.. plot:: /media/TOSHI/temp/numpy_scipy_matplotlib/matplotlib/matplotlib-1.1.1~rc2/doc/mpl_examples/pylab_examples/coords_demo.py

::

    #!/usr/bin/env python
    """
    An example of how to interact with the plotting canvas by connecting
    to move and click events
    """
    import sys
    from pylab import *
    
    t = arange(0.0, 1.0, 0.01)
    s = sin(2*pi*t)
    ax = subplot(111)
    ax.plot(t,s)
    
    
    def on_move(event):
        # get the x and y pixel coords
        x, y = event.x, event.y
    
        if event.inaxes:
            ax = event.inaxes  # the axes instance
            print 'data coords', event.xdata, event.ydata
    
    def on_click(event):
        # get the x and y coords, flip y from top to bottom
        x, y = event.x, event.y
        if event.button==1:
            if event.inaxes is not None:
                print 'data coords', event.xdata, event.ydata
    
    binding_id = connect('motion_notify_event', on_move)
    connect('button_press_event', on_click)
    
    if "test_disconnect" in sys.argv:
        print "disconnecting console coordinate printout..."
        disconnect(binding_id)
    
    show()
    

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