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"""
provides a classese of simlpe units that will be used with AxesDivider
class (or others) to determine the size of each axes. The unit
classes define `get_size` method that returns a tuple of two floats,
meaning relative and absolute sizes, respectively.
Note that this class is nothing more than a simple tuple of two
floats. Take a look at the Divider class to see how these two
values are used.
"""
import matplotlib.cbook as cbook
class _Base(object):
"Base class"
pass
class Fixed(_Base):
"Simple fixed size with absolute part = *fixed_size* and relative part = 0"
def __init__(self, fixed_size):
self.fixed_size = fixed_size
def get_size(self, renderer):
rel_size = 0.
abs_size = self.fixed_size
return rel_size, abs_size
class Scaled(_Base):
"Simple scaled(?) size with absolute part = 0 and relative part = *scalable_size*"
def __init__(self, scalable_size):
self._scalable_size = scalable_size
def get_size(self, renderer):
rel_size = self._scalable_size
abs_size = 0.
return rel_size, abs_size
Scalable=Scaled
class AxesX(_Base):
"""
Scaled size whose relative part corresponds to the data width
of the *axes* multiplied by the *aspect*.
"""
def __init__(self, axes, aspect=1.):
self._axes = axes
self._aspect = aspect
def get_size(self, renderer):
l1, l2 = self._axes.get_xlim()
rel_size = abs(l2-l1)*self._aspect
abs_size = 0.
return rel_size, abs_size
class AxesY(_Base):
"""
Scaled size whose relative part corresponds to the data height
of the *axes* multiplied by the *aspect*.
"""
def __init__(self, axes, aspect=1.):
self._axes = axes
self._aspect = aspect
def get_size(self, renderer):
l1, l2 = self._axes.get_ylim()
rel_size = abs(l2-l1)*self._aspect
abs_size = 0.
return rel_size, abs_size
class MaxExtent(_Base):
"""
Size whose absolute part is the largest width (or height) of
the given *artist_list*.
"""
def __init__(self, artist_list, w_or_h):
self._artist_list = artist_list
if w_or_h not in ["width", "height"]:
raise ValueError()
self._w_or_h = w_or_h
def add_artist(self, a):
self._artist_list.append(a)
def get_size(self, renderer):
rel_size = 0.
w_list, h_list = [], []
for a in self._artist_list:
bb = a.get_window_extent(renderer)
w_list.append(bb.width)
h_list.append(bb.height)
dpi = a.get_figure().get_dpi()
if self._w_or_h == "width":
abs_size = max(w_list)/dpi
elif self._w_or_h == "height":
abs_size = max(h_list)/dpi
return rel_size, abs_size
class MaxWidth(_Base):
"""
Size whose absolute part is the largest width of
the given *artist_list*.
"""
def __init__(self, artist_list):
self._artist_list = artist_list
def add_artist(self, a):
self._artist_list.append(a)
def get_size(self, renderer):
rel_size = 0.
w_list = []
for a in self._artist_list:
bb = a.get_window_extent(renderer)
w_list.append(bb.width)
dpi = a.get_figure().get_dpi()
abs_size = max(w_list)/dpi
return rel_size, abs_size
class MaxHeight(_Base):
"""
Size whose absolute part is the largest height of
the given *artist_list*.
"""
def __init__(self, artist_list):
self._artist_list = artist_list
def add_artist(self, a):
self._artist_list.append(a)
def get_size(self, renderer):
rel_size = 0.
h_list = []
for a in self._artist_list:
bb = a.get_window_extent(renderer)
h_list.append(bb.height)
dpi = a.get_figure().get_dpi()
abs_size = max(h_list)/dpi
return rel_size, abs_size
class Fraction(_Base):
"""
An instance whose size is a *fraction* of the *ref_size*.
>>> s = Fraction(0.3, AxesX(ax))
"""
def __init__(self, fraction, ref_size):
self._fraction_ref = ref_size
self._fraction = fraction
def get_size(self, renderer):
if self._fraction_ref is None:
return self._fraction, 0.
else:
r, a = self._fraction_ref.get_size(renderer)
rel_size = r*self._fraction
abs_size = a*self._fraction
return rel_size, abs_size
class Padded(_Base):
"""
Return a instance where the absolute part of *size* is
increase by the amount of *pad*.
"""
def __init__(self, size, pad):
self._size = size
self._pad = pad
def get_size(self, renderer):
r, a = self._size.get_size(renderer)
rel_size = r
abs_size = a + self._pad
return rel_size, abs_size
def from_any(size, fraction_ref=None):
"""
Creates Fixed unit when the first argument is a float, or a
Fraction unit if that is a string that ends with %. The second
argument is only meaningful when Fraction unit is created.
>>> a = Size.from_any(1.2) # => Size.Fixed(1.2)
>>> Size.from_any("50%", a) # => Size.Fraction(0.5, a)
"""
if cbook.is_numlike(size):
return Fixed(size)
elif cbook.is_string_like(size):
if size[-1] == "%":
return Fraction(float(size[:-1])/100., fraction_ref)
raise ValueError("Unknown format")