import matplotlib.pyplot as plt
import matplotlib.patches as mpatches
 
fig = plt.figure(1, figsize=(8,5))
fig.clf()
from mpl_toolkits.axes_grid.axes_grid import AxesGrid
from mpl_toolkits.axes_grid.anchored_artists import AnchoredText
 
#from matplotlib.font_manager import FontProperties
 
def add_at(ax, t, loc=2):
    fp = dict(size=8)
    _at = AnchoredText(t, loc=loc, prop=fp)
    ax.add_artist(_at)
    return _at
 
 
grid = AxesGrid(fig, 111, (3, 5), label_mode="1", share_all=True)
 
grid[0].set_autoscale_on(False)
 
 
x1, y1 = 0.3, 0.3
x2, y2 = 0.7, 0.7
 
 
def demo_con_style(ax, connectionstyle, label=None):
 
    if label is None:
        label = connectionstyle
 
    x1, y1 = 0.3, 0.2
    x2, y2 = 0.8, 0.6
 
    ax.plot([x1, x2], [y1, y2], ".")
    ax.annotate("",
                xy=(x1, y1), xycoords='data',
                xytext=(x2, y2), textcoords='data',
                arrowprops=dict(arrowstyle="->", #linestyle="dashed",
                                color="0.5",
                                shrinkA=5, shrinkB=5,
                                patchA=None,
                                patchB=None,
                                connectionstyle=connectionstyle,
                                ),
                )
 
    add_at(ax, label, loc=2)
 
column = grid.axes_column[0]
 
demo_con_style(column[0], "angle3,angleA=90,angleB=0",
               label="angle3,\nangleA=90,\nangleB=0")
demo_con_style(column[1], "angle3,angleA=0,angleB=90",
               label="angle3,\nangleA=0,\nangleB=90")
 
 
 
column = grid.axes_column[1]
 
demo_con_style(column[0], "arc3,rad=0.")
demo_con_style(column[1], "arc3,rad=0.3")
demo_con_style(column[2], "arc3,rad=-0.3")
 
 
 
column = grid.axes_column[2]
 
demo_con_style(column[0], "angle,angleA=-90,angleB=180,rad=0",
               label="angle,\nangleA=-90,\nangleB=180,\nrad=0")
demo_con_style(column[1], "angle,angleA=-90,angleB=180,rad=5",
               label="angle,\nangleA=-90,\nangleB=180,\nrad=5")
demo_con_style(column[2], "angle,angleA=-90,angleB=10,rad=5",
               label="angle,\nangleA=-90,\nangleB=10,\nrad=0")
 
 
column = grid.axes_column[3]
 
demo_con_style(column[0], "arc,angleA=-90,angleB=0,armA=30,armB=30,rad=0",
               label="arc,\nangleA=-90,\nangleB=0,\narmA=30,\narmB=30,\nrad=0")
demo_con_style(column[1], "arc,angleA=-90,angleB=0,armA=30,armB=30,rad=5",
               label="arc,\nangleA=-90,\nangleB=0,\narmA=30,\narmB=30,\nrad=5")
demo_con_style(column[2], "arc,angleA=-90,angleB=0,armA=0,armB=40,rad=0",
               label="arc,\nangleA=-90,\nangleB=0,\narmA=0,\narmB=40,\nrad=0")
 
 
column = grid.axes_column[4]
 
demo_con_style(column[0], "bar,fraction=0.3",
               label="bar,\nfraction=0.3")
demo_con_style(column[1], "bar,fraction=-0.3",
               label="bar,\nfraction=-0.3")
demo_con_style(column[2], "bar,angle=180,fraction=-0.2",
               label="bar,\nangle=180,\nfraction=-0.2")
 
 
#demo_con_style(column[1], "arc3,rad=0.3")
#demo_con_style(column[2], "arc3,rad=-0.3")
 
 
grid[0].set_xlim(0, 1)
grid[0].set_ylim(0, 1)
grid.axes_llc.axis["bottom"].toggle(ticklabels=False)
grid.axes_llc.axis["left"].toggle(ticklabels=False)
fig.subplots_adjust(left=0.05, right=0.95, bottom=0.05, top=0.95)
 
plt.draw()
plt.show()