.. _pylab_examples-fancyarrow_demo:

pylab_examples example code: fancyarrow_demo.py
===============================================



.. plot:: /home/mandrake/rpm/BUILD/matplotlib-1.1.1/doc/mpl_examples/pylab_examples/fancyarrow_demo.py

::

    import matplotlib.patches as mpatches
    import matplotlib.pyplot as plt
    
    styles = mpatches.ArrowStyle.get_styles()
    
    ncol=2
    nrow = (len(styles)+1) // ncol
    figheight = (nrow+0.5)
    fig1 = plt.figure(1, (4.*ncol/1.5, figheight/1.5))
    fontsize = 0.2 * 70
    
    
    ax = fig1.add_axes([0, 0, 1, 1], frameon=False, aspect=1.)
    
    ax.set_xlim(0, 4*ncol)
    ax.set_ylim(0, figheight)
    
    def to_texstring(s):
        s = s.replace("<", r"$<$")
        s = s.replace(">", r"$>$")
        s = s.replace("|", r"$|$")
        return s
    
    for i, (stylename, styleclass) in enumerate(sorted(styles.items())):
        x = 3.2 + (i//nrow)*4
        y = (figheight - 0.7 - i%nrow) # /figheight
        p = mpatches.Circle((x, y), 0.2, fc="w")
        ax.add_patch(p)
    
        ax.annotate(to_texstring(stylename), (x, y),
                    (x-1.2, y),
                    #xycoords="figure fraction", textcoords="figure fraction",
                    ha="right", va="center",
                    size=fontsize,
                    arrowprops=dict(arrowstyle=stylename,
                                    patchB=p,
                                    shrinkA=5,
                                    shrinkB=5,
                                    fc="w", ec="k",
                                    connectionstyle="arc3,rad=-0.05",
                                    ),
                    bbox=dict(boxstyle="square", fc="w"))
    
    ax.xaxis.set_visible(False)
    ax.yaxis.set_visible(False)
    
    
    
    plt.draw()
    plt.show()
    

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