>>> """
=======================
Simple Anchored Artists
=======================

This example illustrates the use of the anchored helper classes found in
:mod:`matplotlib.offsetbox` and in :mod:`mpl_toolkits.axes_grid1`.
An implementation of a similar figure, but without use of the toolkit,
can be found in :doc:`/gallery/misc/anchored_artists`.
"""
... 
... import matplotlib.pyplot as plt
... 
... 
... def draw_text(ax):
...     """
    Draw two text-boxes, anchored by different corners to the upper-left
    corner of the figure.
    """
...     from matplotlib.offsetbox import AnchoredText
...     at = AnchoredText("Figure 1a",
...                       loc='upper left', prop=dict(size=8), frameon=True,
...                       )
...     at.patch.set_boxstyle("round,pad=0.,rounding_size=0.2")
...     ax.add_artist(at)
... 
...     at2 = AnchoredText("Figure 1(b)",
...                        loc='lower left', prop=dict(size=8), frameon=True,
...                        bbox_to_anchor=(0., 1.),
...                        bbox_transform=ax.transAxes
...                        )
...     at2.patch.set_boxstyle("round,pad=0.,rounding_size=0.2")
...     ax.add_artist(at2)
... 
... 
... def draw_circle(ax):
...     """
    Draw a circle in axis coordinates
    """
...     from mpl_toolkits.axes_grid1.anchored_artists import AnchoredDrawingArea
...     from matplotlib.patches import Circle
...     ada = AnchoredDrawingArea(20, 20, 0, 0,
...                               loc='upper right', pad=0., frameon=False)
...     p = Circle((10, 10), 10)
...     ada.da.add_artist(p)
...     ax.add_artist(ada)
... 
... 
... def draw_ellipse(ax):
...     """
    Draw an ellipse of width=0.1, height=0.15 in data coordinates
    """
...     from mpl_toolkits.axes_grid1.anchored_artists import AnchoredEllipse
...     ae = AnchoredEllipse(ax.transData, width=0.1, height=0.15, angle=0.,
...                          loc='lower left', pad=0.5, borderpad=0.4,
...                          frameon=True)
... 
...     ax.add_artist(ae)
... 
... 
... def draw_sizebar(ax):
...     """
    Draw a horizontal bar with length of 0.1 in data coordinates,
    with a fixed label underneath.
    """
...     from mpl_toolkits.axes_grid1.anchored_artists import AnchoredSizeBar
...     asb = AnchoredSizeBar(ax.transData,
...                           0.1,
...                           r"1$^{\prime}$",
...                           loc='lower center',
...                           pad=0.1, borderpad=0.5, sep=5,
...                           frameon=False)
...     ax.add_artist(asb)
... 
... 
... fig, ax = plt.subplots()
... ax.set_aspect(1.)
... 
... draw_text(ax)
... draw_circle(ax)
... draw_ellipse(ax)
... draw_sizebar(ax)
... 
... plt.show()
...