def __init__(self, transform, size, label, loc,
                 pad=0.1, borderpad=0.1, sep=2, prop=None, frameon=True):
        """
        Draw a horizontal bar with the size in data coordinate of the give axes.
        A label will be drawn underneath (center-aligned).

        pad, borderpad in fraction of the legend font size (or prop)
        sep in points.
        loc:
            'upper right'  : 1,
            'upper left'   : 2,
            'lower left'   : 3,
            'lower right'  : 4,
            'right'        : 5,
            'center left'  : 6,
            'center right' : 7,
            'lower center' : 8,
            'upper center' : 9,
            'center'       : 10
        """
        self.size_bar = AuxTransformBox(transform)
        self.size_bar.add_artist(Rectangle((0, 0), size, 0, fc='none', color='white', lw=3))

        self.txt_label = TextArea(label, dict(color='white', size='x-large', weight='normal'),
                                  minimumdescent=False)

        self._box = VPacker(children=[self.size_bar, self.txt_label],
                            align="center",
                            pad=0, sep=sep)

        AnchoredOffsetbox.__init__(self, loc, pad=pad, borderpad=borderpad,
                                   child=self._box,
                                   prop=prop,
                                   frameon=frameon)

    def __init__(self, transform, sizex=0, sizey=0, labelx=None, labely=None,
                 loc=3, pad=0.1, borderpad=0.1, sep=2, prop=None, **kwargs):
        """
        Draw a horizontal and/or vertical  bar with the size in data coordinate
        of the give axes. A label will be drawn underneath (center-aligned).
        - transform : the coordinate frame (typically axes.transData)
        - sizex,sizey : width of x,y bar, in data units. 0 to omit
        - labelx,labely : labels for x,y bars; None to omit
        - loc : position in containing axes
        - pad, borderpad : padding, in fraction of legend font size (or prop)
        - sep : separation between labels and bars in points.
        - **kwargs : additional arguments passed to base class constructor
        """
        from matplotlib.patches import Rectangle
        from matplotlib.offsetbox import AuxTransformBox, VPacker, HPacker
        from matplotlib.offsetbox import TextArea, DrawingArea
        bars = AuxTransformBox(transform)
        if sizex:
            bars.add_artist(Rectangle((0, 0), sizex, 0, fc="none"))
        if sizey:
            bars.add_artist(Rectangle((0, 0), 0, sizey, fc="none"))

        if sizex and labelx:
            bars = VPacker(children=[bars, TextArea(labelx,
                                                    minimumdescent=False)],
                           align="center", pad=0, sep=sep)
        if sizey and labely:
            bars = HPacker(children=[TextArea(labely), bars],
                           align="center", pad=0, sep=sep)

        AnchoredOffsetbox.__init__(self, loc, pad=pad, borderpad=borderpad,
                                   child=bars, prop=prop, frameon=False,
                                   **kwargs)

    def __init__(self, transform, loc, pad=0.4, borderpad=0.5, prop=None, frameon=True, **kwargs):

        self.drawing_area = AuxTransformBox(transform)

        AnchoredOffsetbox.__init__(
            self, loc, pad=pad, borderpad=borderpad, child=self.drawing_area, prop=prop, frameon=frameon, **kwargs
        )

    def __init__(self, transform, fig_transform,
                 sizex=0, sizey=0, labelx=None, labely=None, loc=4,
                 xbar_width = 2, ybar_width = 2,
                 pad=3, borderpad=0.1, xsep=3, ysep = 3, prop=None, textprops={'size':10}, **kwargs):
        """
        Draw a horizontal and/or vertical  bar with the size in data coordinate
        of the give axes. A label will be drawn underneath (center-aligned).
 
        - transform : the coordinate frame (typically axes.transData)
        - sizex,sizey : width of x,y bar, in data units. 0 to omit
        - labelx,labely : labels for x,y bars; None to omit
        - loc : position in containing axes
        - pad, borderpad : padding, in fraction of the legend font size (or prop)
        - sep : separation between labels and bars in points.
        - **kwargs : additional arguments passed to base class constructor
        """
        from matplotlib.patches import Rectangle
        from matplotlib.offsetbox import AuxTransformBox, VPacker, HPacker, TextArea, DrawingArea
        # new shit
        # try splitting the transform into X and Y so that
        import matplotlib.transforms as transforms
        xtransform = transforms.blended_transform_factory(transform, fig_transform)
        ytransform = transforms.blended_transform_factory(fig_transform, transform)
        # end new shit

        # bars = AuxTransformBox(xtransform)
        # if sizey:
        #     bars.add_artist(Rectangle((0,0), ybar_width, sizey,
        #                               fc="Black"))
        # if sizex:
        #     bars.add_artist(Rectangle((0,0), sizex, xbar_width,
        #                               fc="Black"))
 
        ybar_width /= 72.
        xbar_width /= 72.
        
        if sizey:
            ybar = AuxTransformBox(ytransform)
            ybar.add_artist(Rectangle((0,0), ybar_width, sizey, fc="Black"))
            bars = ybar
        if sizex:
            xbar = AuxTransformBox(xtransform)
            xbar.add_artist(Rectangle((0,0), sizex, xbar_width, fc="Black"))
            bars = xbar
        if sizex and sizey:
            bars = VPacker(children=[ybar, xbar], pad = 10, sep=ysep)
        if sizex and labelx:
            bars = VPacker(children=[bars, TextArea(labelx,
                                                    minimumdescent=False,
                                                    textprops = textprops)],
                           align="center", pad=0, sep=-3)
        if sizey and labely:
            bars = HPacker(children=[TextArea(labely,
                                              textprops = textprops), bars],
                            align="center", pad=0, sep=xsep)

        AnchoredOffsetbox.__init__(self, loc, pad=pad, borderpad=borderpad,
                                   child=bars, prop=prop, frameon=False, **kwargs)

    def __init__(self, ax, transSky2Pix, loc,
                 arrow_fraction=0.15,
                 txt1="E", txt2="N",
                 delta_a1=0, delta_a2=0,
                 pad=0.1, borderpad=0.5, prop=None, frameon=False,
                 ):
        """
        Draw an arrows pointing the directions of E & N

        arrow_fraction : length of the arrow as a fraction of axes size

        pad, borderpad in fraction of the legend font size (or prop)
        """

        self._ax = ax
        self._transSky2Pix = transSky2Pix
        self._box = AuxTransformBox(ax.transData)
        self.delta_a1, self.delta_a2 = delta_a1, delta_a2
        self.arrow_fraction = arrow_fraction

        kwargs = dict(mutation_scale=11,
                      shrinkA=0,
                      shrinkB=5)

        self.arrow1 = FancyArrowPatch(posA=(0, 0), posB=(1, 1),
                                      arrowstyle="->",
                                      arrow_transmuter=None,
                                      connectionstyle="arc3",
                                      connector=None,
                                      **kwargs)
        self.arrow2 = FancyArrowPatch(posA=(0, 0), posB=(1, 1),
                                      arrowstyle="->",
                                      arrow_transmuter=None,
                                      connectionstyle="arc3",
                                      connector=None,
                                      **kwargs)


        x1t, y1t, x2t, y2t = 1, 1, 1, 1
        self.txt1 = Text(x1t, y1t, txt1, rotation=0,
                         rotation_mode="anchor",
                         va="center", ha="right")
        self.txt2 = Text(x2t, y2t, txt2, rotation=0,
                         rotation_mode="anchor",
                         va="bottom", ha="center")


        self._box.add_artist(self.arrow1)
        self._box.add_artist(self.arrow2)

        self._box.add_artist(self.txt1)
        self._box.add_artist(self.txt2)

        AnchoredOffsetbox.__init__(self, loc, pad=pad, borderpad=borderpad,
                                   child=self._box,
                                   prop=prop,
                                   frameon=frameon)

    def __init__(
        self,
        transform,
        sizex=0,
        sizey=0,
        labelx=None,
        labely=None,
        loc=4,
        pad=0.1,
        borderpad=0.1,
        sep=2,
        prop=None,
        label_fontsize=label_fontsize,
        color="k",
        **kwargs
    ):
        """
        Draw a horizontal and/or vertical  bar with the size in data coordinate
        of the give axes. A label will be drawn underneath (center-aligned).

        - transform : the coordinate frame (typically axes.transData)
        - sizex,sizey : width of x,y bar, in data units. 0 to omit
        - labelx,labely : labels for x,y bars; None to omit
        - loc : position in containing axes
        - pad, borderpad : padding, in fraction of the legend font size (or prop)
        - sep : separation between labels and bars in points.
        - **kwargs : additional arguments passed to base class constructor
        """
        from matplotlib.patches import Rectangle
        from matplotlib.offsetbox import AuxTransformBox, VPacker, HPacker, TextArea, DrawingArea

        bars = AuxTransformBox(transform)
        if sizex:
            bars.add_artist(Rectangle((0, 0), sizex, 0, fc="none", linewidth=axes_linewidth, color=color))
        if sizey:
            bars.add_artist(Rectangle((0, 0), 0, sizey, fc="none", linewidth=axes_linewidth, color=color))

        if sizex and labelx:
            textareax = TextArea(labelx, minimumdescent=False, textprops=dict(size=label_fontsize, color=color))
            bars = VPacker(children=[bars, textareax], align="center", pad=0, sep=sep)
        if sizey and labely:
            ## VPack a padstr below the rotated labely, else label y goes below the scale bar
            ## Just adding spaces before labely doesn't work!
            padstr = "\n " * len(labely)
            textareafiller = TextArea(padstr, textprops=dict(size=label_fontsize / 3.0))
            textareay = TextArea(labely, textprops=dict(size=label_fontsize, rotation="vertical", color=color))
            ## filler / pad string VPack-ed below labely
            textareayoffset = VPacker(children=[textareay, textareafiller], align="center", pad=0, sep=sep)
            ## now HPack this padded labely to the bars
            bars = HPacker(children=[textareayoffset, bars], align="top", pad=0, sep=sep)

        AnchoredOffsetbox.__init__(
            self, loc, pad=pad, borderpad=borderpad, child=bars, prop=prop, frameon=False, **kwargs
        )

def anchor_legend(ax, box, row, col):
    anchored = AnchoredOffsetbox(loc=2,
                                 child=box,
                                 pad=0.,
                                 frameon=False,
                                 bbox_to_anchor=(1 + 0.25*col, 1 - 0.054*row),
                                 bbox_transform=ax.transAxes,
                                 )
    # Workaround for a bug in matplotlib up to 1.3.1
    # https://github.com/matplotlib/matplotlib/issues/2530
    anchored.set_clip_on(False)
    ax.add_artist(anchored)

    def __init__(self, ax, label, bar_length, **props):
        '''
        Draw a horizontal bar with the size in data coordinate of the give axes.
        A label will be drawn above (center-aligned).
        '''
        label_size = props['label_size'] if 'label_size' in props else \
            rcParams.get('scalebar.label_size', 16)
        label_family = props['label_family'] if 'label_family' in props else \
            rcParams.get('scalebar.label_family', 'sans-serif')
        label_color = props['label_color'] if 'label_color' in props else \
            rcParams.get('scalebar.label_color', 'black')
        location = props['location'] if 'location' in props else \
            rcParams.get('scalebar.location', 4)
        padding = props['padding'] if 'padding' in props else \
            rcParams.get('scalebar.padding', 0.5)
        sep = props['sep'] if 'sep' in props else \
            rcParams.get('scalebar.sep', 2)
        bar_color = props['bar_color'] if 'bar_color' in props else \
            rcParams.get('scalebar.bar_color', 'black')
        bar_width = props['bar_width'] if 'bar_width' in props else \
            rcParams.get('scalebar.bar_width', 0.1)
        bar_length = props['bar_length'] if 'bar_length' in props else \
            rcParams.get('scalebar.bar_length', 0.8)

        frameon = False
        prop = None

        self.scale_bar = AuxTransformBox(ax.transData)


        rect = mpatches.Rectangle((0, 0),
                          bar_length, bar_width,
                          linewidth=0, edgecolor=None,
                          facecolor=bar_color)

        self.scale_bar.add_artist(rect)

        textprops = {'size': label_size}

        self.txt_label = TextArea(label, textprops=textprops, minimumdescent=False)

        self._box = VPacker(children=[self.txt_label, self.scale_bar],
                            align="center",
                            pad=0, sep=sep)

        AnchoredOffsetbox.__init__(self, location, pad=padding, borderpad=0,
                                   child=self._box,
                                   prop=prop,
                                   frameon=frameon)

    def __init__(self, transform, sizex=0, sizey=0, labelx=None, labely=None,
                 loc=4, pad=0.1, borderpad=0.1, sep=2, prop=None, fontsize='medium', **kwargs):
        """
        Modified, draws a horizontal and/or vertical bar with the size in data coordinate
        of the give axes. A label will be drawn underneath (center-aligned).

        Parameters
        ----------
        transform : the coordinate frame (typically axes.transData)
        sizex, sizey : width of x,y bar, in data units. 0 to omit
        labelx, labely : labels for x,y bars; None to omit
        loc : position in containing axes
        pad, borderpad : padding, in fraction of the legend font size (or prop)
        sep : separation between labels and bars in points.
        **kwargs : additional arguments passed to base class constructor

        Notes
        -----
        Adapted from mpl_toolkits.axes_grid2

        """
        from matplotlib.lines import Line2D
        from matplotlib.text import Text
        from matplotlib.offsetbox import AuxTransformBox
        bars = AuxTransformBox(transform)
        inv = transform.inverted()
        pixelxy = inv.transform((1, 1)) - inv.transform((0, 0))

        if sizex:
            barx = Line2D([sizex, 0], [0, 0], transform=transform, color='k')
            bars.add_artist(barx)

        if sizey:
            bary = Line2D([0, 0], [0, sizey], transform=transform, color='k')
            bars.add_artist(bary)

        if sizex and labelx:
            textx = Text(text=labelx, x=sizex/2.0, y=-5*pixelxy[1], ha='center', va='top', size=fontsize)
            bars.add_artist(textx)

        if sizey and labely:
            texty = Text(text=labely, rotation='vertical', y=sizey/2.0, x=-2*pixelxy[0],
                         va='center', ha='right', size=fontsize)
            bars.add_artist(texty)

        AnchoredOffsetbox.__init__(self, loc=loc, pad=pad, borderpad=borderpad,
                                       child=bars, prop=prop, frameon=False, **kwargs)

    def __init__(self, transform, sizex=0, sizey=0, labelx=None, labely=None, loc=4,
                 pad=0.1, borderpad=0.1, sep=2, linewidth=3, prop=None, fontprops={},
                 **kwargs):
        """
        Args:
            - transform : the coordinate frame (typically axes.transData)
            - sizex,sizey : width of x,y bar, in data units. 0 to omit
            - labelx,labely : labels for x,y bars; None to omit
            - loc : position in containing axes, see matplotlib.offsetbox.AnchoredOffsetbox for docs
            - pad, borderpad : padding, in fraction of the legend font size (or prop)
            - sep : separation between labels and bars in points.
            - fontprops: dict specifying text label properties, https://matplotlib.org/users/text_props.html
            - **kwargs : additional arguments passed to base class constructor
        """

        from matplotlib.patches import Rectangle
        from matplotlib.lines import Line2D
        from matplotlib.offsetbox import AuxTransformBox, VPacker, HPacker, TextArea, DrawingArea, OffsetBox

        fontprops.update({'fontsize': 8})  # need fontprops defaults here, otherwise overwritten on change if in fn defn
        
        bars = AuxTransformBox(transform)

        bars.add_artist(Line2D((0,0,sizex),(sizey,0,0), lw=linewidth,
                                   color='k', solid_capstyle='butt', solid_joinstyle='miter'))

        # Note: this packs the y label and both bars together into a box, then packs the x label below the box, so the
        # x label is slightly off center of the x bar.  This can cause some small alignment problems, but fixing it requires knowledge
        # of matplotlib offsetboxes, auxtransformboxes, and transforms that I don't have.
        if sizey and labely:
            bars = HPacker(children=[TextArea(labely.strip(), textprops=fontprops), bars],
                            align="center", pad=0, sep=sep)
        if sizex and labelx:
            bars = VPacker(children=[bars, TextArea(labelx.strip(), minimumdescent=False, textprops=fontprops)],
                           align="center", pad=0, sep=sep)
 
        AnchoredOffsetbox.__init__(self, loc, pad=pad, borderpad=borderpad,
                                   child=bars, prop=prop, frameon=False, **kwargs)

def draw_legend(ax, legend, legend_type, legend_title, ith_legend):
    children = []
    children.append(make_title(legend_title))
    viz_handler = legend_viz[legend_type]
    legend_items = sorted(legend.items(), key=operator.itemgetter(1))
    children += [viz_handler(str(lab), col) for col, lab in legend_items]
    box = VPacker(children=children, align="left", pad=0, sep=5)

    # TODO: The vertical spacing between the legends isn't consistent. Should be
    # padded consistently
    anchored_box = AnchoredOffsetbox(loc=6,
                                     child=box, pad=0.,
                                     frameon=False,
                                     #bbox_to_anchor=(0., 1.02),
                                     # Spacing goes here
                                     bbox_to_anchor=(1, 0.8 - 0.35 * ith_legend),
                                     bbox_transform=ax.transAxes,
                                     borderpad=1.,
                                     )
    # Workaround for a bug in matplotlib up to 1.3.1
    # https://github.com/matplotlib/matplotlib/issues/2530
    anchored_box.set_clip_on(False)
    return anchored_box

    def __init__(self, transform, loc,
                 pad=0.4, borderpad=0.5, prop=None, frameon=True, **kwargs):
        """
        An anchored container with transformed coordinates.

        Artists added to the *drawing_area* are scaled according to the
        coordinates of the transformation used. The dimensions of this artist
        will scale to contain the artists added.

        Parameters
        ----------
        transform : `matplotlib.transforms.Transform`
            The transformation object for the coordinate system in use, i.e.,
            :attr:`matplotlib.axes.Axes.transData`.

        loc : int
            Location of this artist. Valid location codes are::

                'upper right'  : 1,
                'upper left'   : 2,
                'lower left'   : 3,
                'lower right'  : 4,
                'right'        : 5,
                'center left'  : 6,
                'center right' : 7,
                'lower center' : 8,
                'upper center' : 9,
                'center'       : 10

        pad : int or float, optional
            Padding around the child objects, in fraction of the font
            size. Defaults to 0.4.

        borderpad : int or float, optional
            Border padding, in fraction of the font size.
            Defaults to 0.5.

        prop : `matplotlib.font_manager.FontProperties`, optional
            Font property used as a reference for paddings.

        frameon : bool, optional
            If True, draw a box around this artists. Defaults to True.

        **kwargs
            Keyworded arguments to pass to
            :class:`matplotlib.offsetbox.AnchoredOffsetbox`.

        Attributes
        ----------
        drawing_area : `matplotlib.offsetbox.AuxTransformBox`
            A container for artists to display.

        Examples
        --------
        To display an ellipse in the upper left, with a width of 0.1 and
        height of 0.4 in data coordinates:

        >>> box = AnchoredAuxTransformBox(ax.transData, loc='upper left')
        >>> el = Ellipse((0,0), width=0.1, height=0.4, angle=30)
        >>> box.drawing_area.add_artist(el)
        >>> ax.add_artist(box)
        """
        self.drawing_area = AuxTransformBox(transform)

        AnchoredOffsetbox.__init__(self, loc, pad=pad, borderpad=borderpad,
                                   child=self.drawing_area,
                                   prop=prop,
                                   frameon=frameon,
                                   **kwargs)

#.........这里部分代码省略.........
        colorbarbox.add_artist(col)

        # Create outline
        if orientation == 'horizontal':
            outline = Rectangle((0, 0), length_fraction, width_fraction,
                                fill=False, ec=color)
        else:
            outline = Rectangle((0, 0), width_fraction, length_fraction,
                                fill=False, ec=color)
        colorbarbox.add_artist(outline)

        # Create ticks and tick labels
        w10th = width_fraction / 10.0
        ticklines = []
        ticktexts = []
        for tick, ticklabel in zip(ticks, ticklabels):
            if ticklocation == 'bottom':
                x0 = x1 = xtext = tick
                y0 = w10th
                y1 = -w10th
                ytext = -2 * w10th
                ha = 'center'
                va = 'top'
            elif ticklocation == 'top':
                x0 = x1 = xtext = tick
                y0 = width_fraction - w10th
                y1 = width_fraction + w10th
                ytext = width_fraction + 2 * w10th
                ha = 'center'
                va = 'bottom'
            elif ticklocation == 'left':
                x0 = w10th
                x1 = -w10th
                xtext = -2 * w10th
                y0 = y1 = ytext = tick
                ha = 'right'
                va = 'center'
            elif ticklocation == 'right':
                x0 = width_fraction - w10th
                x1 = width_fraction + w10th
                xtext = width_fraction + 2 * w10th
                y0 = y1 = ytext = tick
                ha = 'left'
                va = 'center'

            ticklines.append([(x0, y0), (x1, y1)])

            ticklabel = offset_string + ticklabel
            ticktext = Text(xtext, ytext, ticklabel,
                            color=color,
                            fontproperties=font_properties,
                            horizontalalignment=ha,
                            verticalalignment=va)
            ticktexts.append(ticktext)

        col = LineCollection(ticklines, color=color)
        colorbarbox.add_artist(col)

        for ticktext in ticktexts:
            colorbarbox.add_artist(ticktext)

        # Create label
        if label:
            labelbox = AuxTransformBox(ax.transAxes)

            va = 'baseline' if orientation == 'horizontal' else 'center'
            text = Text(0, 0, label,
                        fontproperties=font_properties,
                        verticalalignment=va,
                        rotation=orientation,
                        color=color)
            labelbox.add_artist(text)
        else:
            labelbox = None

        # Create final offset box
        if ticklocation == 'bottom':
            children = [colorbarbox, labelbox] if labelbox else [colorbarbox]
            child = VPacker(children=children, align='center', pad=0, sep=sep)
        elif ticklocation == 'top':
            children = [labelbox, colorbarbox] if labelbox else [colorbarbox]
            child = VPacker(children=children, align='center', pad=0, sep=sep)
        elif ticklocation == 'left':
            children = [labelbox, colorbarbox] if labelbox else [colorbarbox]
            child = HPacker(children=children, align='center', pad=0, sep=sep)
        elif ticklocation == 'right':
            children = [colorbarbox, labelbox] if labelbox else [colorbarbox]
            child = HPacker(children=children, align='center', pad=0, sep=sep)
#
        box = AnchoredOffsetbox(loc=location,
                                pad=pad,
                                borderpad=border_pad,
                                child=child,
                                frameon=frameon)

        box.axes = ax
        box.set_figure(self.get_figure())
        box.patch.set_color(box_color)
        box.patch.set_alpha(box_alpha)
        box.draw(renderer)

#.........这里部分代码省略.........

        patches = []
        for x in np.arange(0, length, step_length):
            if orientation == 'horizontal':
                patch = Rectangle((x, 0), step_length, width)
            else:
                patch = Rectangle((0, x), width, step_length)
            patches.append(patch)

        values = np.linspace(np.min(array), np.max(array), nbins)
        minvalue, maxvalue = values[0], values[-1]

        col = PatchCollection(patches, cmap=cmap,
                              edgecolors='none')
        col.set_array(values)
        colorbarbox.add_artist(col)

        if orientation == 'horizontal':
            patch = Rectangle((0, 0), length, width, fill=False, ec=color)
        else:
            patch = Rectangle((0, 0), width, length, fill=False, ec=color)
        colorbarbox.add_artist(patch)

        children.append(colorbarbox)

        # Create ticks
        tickbox = AuxTransformBox(ax.transData)

        if ticks is None:
            ticks = [minvalue, maxvalue]  # default

        if not ticklabels:
            ticklabels = ticks[:]  # tick label by default

        if minvalue not in ticks:  # little hack to get right layout position
            ticks.append(minvalue)
            ticklabels.append('')  # no label for this extra tick

        if maxvalue not in ticks:  # little hack to get right layout position
            ticks.append(maxvalue)
            ticklabels.append('')  # no label for this extra tick

        for itick, tick in enumerate(ticks):

            if tick > maxvalue or tick < minvalue:
                continue  # ignore it

            # Fraction of colorbar depending of min and max values of colorbar
            a = 1 / (maxvalue - minvalue)
            b = -a * minvalue
            tickfrac = a * tick + b

            if orientation == 'horizontal':
                tickx = tickfrac * length
                ticky = 0
                ha = 'center'
                va = 'top'
            else:
                tickx = width
                ticky = tickfrac * length
                ha = 'left'
                va = 'center'

            ticktext = Text(tickx, ticky, ticklabels[itick],
                            color=color,
                            fontproperties=font_properties,
                            horizontalalignment=ha,
                            verticalalignment=va)
            tickbox.add_artist(ticktext)

        children.append(tickbox)

        # Create label
        if label:
            labelbox = AuxTransformBox(ax.transData)

            va = 'baseline' if orientation == 'horizontal' else 'center'
            text = Text(0, 0, label,
                        fontproperties=font_properties,
                        verticalalignment=va,
                        rotation=orientation)
            labelbox.add_artist(text)

            children.insert(0, labelbox)

        # Create final offset box
        Packer = VPacker if orientation == 'horizontal' else HPacker
        child = Packer(children=children, align="center", pad=0, sep=sep)

        box = AnchoredOffsetbox(loc=location,
                                pad=pad,
                                borderpad=border_pad,
                                child=child,
                                frameon=frameon)

        box.axes = ax
        box.set_figure(self.get_figure())
        box.patch.set_color(box_color)
        box.patch.set_alpha(box_alpha)
        box.draw(renderer)

    def _draw_legend(self):
        """
        Draw legend onto the figure
        """
        legend_box = self.guides.build(self)
        if not legend_box:
            return

        figure = self.figure
        left = figure.subplotpars.left
        right = figure.subplotpars.right
        top = figure.subplotpars.top
        bottom = figure.subplotpars.bottom
        W, H = figure.get_size_inches()
        position = self.guides.position
        get_property = self.theme.themeables.property
        # defaults
        spacing = 0.1
        strip_margin_x = 0
        strip_margin_y = 0

        with suppress(KeyError):
            spacing = get_property('legend_box_spacing')
        with suppress(KeyError):
            strip_margin_x = get_property('strip_margin_x')
        with suppress(KeyError):
            strip_margin_y = get_property('strip_margin_y')

        right_strip_width = self.facet.strip_size('right')
        top_strip_height = self.facet.strip_size('top')

        # Other than when the legend is on the right the rest of
        # the computed x, y locations are not gauranteed not to
        # overlap with the axes or the labels. The user must then
        # use the legend_margin theme parameter to adjust the
        # location. This should get fixed when MPL has a better
        # layout manager.
        if position == 'right':
            loc = 6
            pad = right_strip_width*(1+strip_margin_x) + spacing
            x = right + pad/W
            y = 0.5
        elif position == 'left':
            loc = 7
            x = left - spacing/W
            y = 0.5
        elif position == 'top':
            loc = 8
            x = 0.5
            pad = top_strip_height*(1+strip_margin_y) + spacing
            y = top + pad/H
        elif position == 'bottom':
            loc = 9
            x = 0.5
            y = bottom - spacing/H
        else:
            loc = 10
            x, y = position

        anchored_box = AnchoredOffsetbox(
            loc=loc,
            child=legend_box,
            pad=0.,
            frameon=False,
            bbox_to_anchor=(x, y),
            bbox_transform=figure.transFigure,
            borderpad=0.)

        anchored_box.set_zorder(90.1)
        self.figure._themeable['legend_background'] = anchored_box
        ax = self.axs[0]
        ax.add_artist(anchored_box)

    def __init__(self, transform, size, label, loc,
                 pad=0.1, borderpad=0.1, sep=2, prop=None,
                 frameon=True, size_vertical=0, color='black',
                 label_top=False,
                 **kwargs):
        """
        Draw a horizontal bar with the size in data coordinate of the give axes.
        A label will be drawn underneath (center-aligned).

        Parameters:
        -----------
        transform : matplotlib transformation object
        size : int or float
          horizontal length of the size bar, given in data coordinates
        label : str
        loc : int
        pad : int or float, optional
          in fraction of the legend font size (or prop)
        borderpad : int or float, optional
          in fraction of the legend font size (or prop)
        sep : int or float, optional
          in points
        frameon : bool, optional
          if True, will draw a box around the horizontal bar and label
        size_vertical : int or float, optional
          vertical length of the size bar, given in data coordinates
        color : str, optional
          color for the size bar and label
        label_top : bool, optional
          if true, the label will be over the rectangle

        Example:
        --------
        >>>> import matplotlib.pyplot as plt
        >>>> import numpy as np
        >>>> from mpl_toolkits.axes_grid1.anchored_artists import AnchoredSizeBar
        >>>> fig, ax = plt.subplots()
        >>>> ax = imshow(np.random.random((10,10)))
        >>>> bar = AnchoredSizeBar(ax.transData, 3, '3 units', pad=0.5, loc=4, sep=5, borderpad=0.5, frameon=False, size_vertical=0.5, color='white')
        >>>> ax.add_artist(bar)
        >>>> plt.show()

        """

        self.size_bar = AuxTransformBox(transform)
        self.size_bar.add_artist(Rectangle((0,0), size, size_vertical, fill=True, facecolor=color, edgecolor=color))

        self.txt_label = TextArea(label, minimumdescent=False)

        if label_top:
            _box_children = [self.txt_label, self.size_bar]
        else:
            _box_children = [self.size_bar, self.txt_label]

        self._box = VPacker(children=_box_children,
                            align="center",
                            pad=0, sep=sep)

        AnchoredOffsetbox.__init__(self, loc, pad=pad, borderpad=borderpad,
                                   child=self._box,
                                   prop=prop,
                                   frameon=frameon, **kwargs)

    def __init__(self, transform, size, label, loc,
                 pad=0.1, borderpad=0.1, sep=2,
                 frameon=True, size_vertical=0, color='black',
                 label_top=False, fontproperties=None,
                 **kwargs):
        """
        Draw a horizontal bar with the size in data coordinate of the given axes.
        A label will be drawn underneath (center-aligned).

        Parameters:
        -----------
        transform : matplotlib transformation object
        size : int or float
          horizontal length of the size bar, given in data coordinates
        label : str
        loc : int
        pad : int or float, optional
          in fraction of the legend font size (or prop)
        borderpad : int or float, optional
          in fraction of the legend font size (or prop)
        sep : int or float, optional
          in points
        frameon : bool, optional
          if True, will draw a box around the horizontal bar and label
        size_vertical : int or float, optional
          vertical length of the size bar, given in data coordinates
        color : str, optional
          color for the size bar and label
        label_top : bool, optional
          if True, the label will be over the rectangle
        fontproperties: a matplotlib.font_manager.FontProperties instance, optional
          sets the font properties for the label text

        Returns:
        --------
        AnchoredSizeBar object

        Example:
        --------
        >>> import matplotlib.pyplot as plt
        >>> import numpy as np
        >>> from mpl_toolkits.axes_grid1.anchored_artists import AnchoredSizeBar
        >>> fig, ax = plt.subplots()
        >>> ax.imshow(np.random.random((10,10)))
        >>> bar = AnchoredSizeBar(ax.transData, 3, '3 units', 4)
        >>> ax.add_artist(bar)
        >>> fig.show()

        Using all the optional parameters

        >>> import matplotlib.font_manager as fm
        >>> fontprops = fm.FontProperties(size=14, family='monospace')
        >>> bar = AnchoredSizeBar(ax.transData, 3, '3 units', 4, pad=0.5, sep=5, borderpad=0.5, frameon=False, size_vertical=0.5, color='white', fontproperties=fontprops)  # noqa

        """

        self.size_bar = AuxTransformBox(transform)
        self.size_bar.add_artist(Rectangle((0, 0), size, size_vertical,
                                           fill=True, facecolor=color,
                                           edgecolor=color))

        # if fontproperties is None, but `prop` is not, assume that
        # prop should be used to set the font properties. This is
        # questionable behavior
        if fontproperties is None and 'prop' in kwargs:
            fontproperties = kwargs.pop('prop')

        if fontproperties is None:
            textprops = {'color': color}
        else:
            textprops = {'color': color, 'fontproperties': fontproperties}

        self.txt_label = TextArea(
            label,
            minimumdescent=False,
            textprops=textprops)

        if label_top:
            _box_children = [self.txt_label, self.size_bar]
        else:
            _box_children = [self.size_bar, self.txt_label]

        self._box = VPacker(children=_box_children,
                            align="center",
                            pad=0, sep=sep)

        AnchoredOffsetbox.__init__(self, loc, pad=pad, borderpad=borderpad,
                                   child=self._box,
                                   prop=fontproperties,
                                   frameon=frameon, **kwargs)

    def draw(self, renderer, *args, **kwargs):
        if not self.get_visible():
            return
        if self.dx == 0:
            return

        # Get parameters
        from matplotlib import rcParams # late import

        def _get_value(attr, default):
            value = getattr(self, attr)
            if value is None:
                value = rcParams.get('scalebar.' + attr, default)
            return value

        length_fraction = _get_value('length_fraction', 0.2)
        height_fraction = _get_value('height_fraction', 0.01)
        location = _get_value('location', 'upper right')
        if isinstance(location,six.string_types):
            location = self._LOCATIONS[location]
        pad = _get_value('pad', 0.2)
        border_pad = _get_value('border_pad',