#!/usr/bin/env python3
"""
The gridspec and subplot grid classes used throughout proplot.
"""
import inspect
import itertools
import re
from collections.abc import MutableSequence
from numbers import Integral
import matplotlib.axes as maxes
import matplotlib.gridspec as mgridspec
import matplotlib.transforms as mtransforms
import numpy as np
from . import axes as paxes
from .config import rc
from .internals import ic # noqa: F401
from .internals import _not_none, docstring, warnings
from .utils import _fontsize_to_pt, units
__all__ = [
'GridSpec',
'SubplotGrid',
'SubplotsContainer' # deprecated
]
# Gridspec vector arguments
# Valid for figure() and GridSpec()
_shared_docstring = """
left, right, top, bottom : unit-spec, default: None
The fixed space between the subplots and the figure edge.
%(units.em)s
If ``None``, the space is determined automatically based on the tick and
label settings. If :rcraw:`subplots.tight` is ``True`` or ``tight=True`` was
passed to the figure, the space is determined by the tight layout algorithm.
"""
_scalar_docstring = """
wspace, hspace, space : unit-spec, default: None
The fixed space between grid columns, rows, or both.
%(units.em)s
If ``None``, the space is determined automatically based on the font size and axis
sharing settings. If :rcraw:`subplots.tight` is ``True`` or ``tight=True`` was
passed to the figure, the space is determined by the tight layout algorithm.
"""
_vector_docstring = """
wspace, hspace, space : unit-spec or sequence, default: None
The fixed space between grid columns, rows, and both, respectively. If
float, string, or ``None``, this value is expanded into lists of length
``ncols - 1`` (for `wspace`) or length ``nrows - 1`` (for `hspace`). If
a sequence, its length must match these lengths.
%(units.em)s
For elements equal to ``None``, the space is determined automatically based
on the tick and label settings. If :rcraw:`subplots.tight` is ``True`` or
``tight=True`` was passed to the figure, the space is determined by the tight
layout algorithm. For example, ``subplots(ncols=3, tight=True, wspace=(2, None))``
fixes the space between columns 1 and 2 but lets the tight layout algorithm
determine the space between columns 2 and 3.
wratios, hratios : float or sequence, optional
Passed to `~proplot.gridspec.GridSpec`, denotes the width and height
ratios for the subplot grid. Length of `wratios` must match the number
of columns, and length of `hratios` must match the number of rows.
width_ratios, height_ratios
Aliases for `wratios`, `hratios`. Included for
consistency with `matplotlib.gridspec.GridSpec`.
wpad, hpad, pad : unit-spec or sequence, optional
The tight layout padding between columns, rows, and both, respectively.
Unlike ``space``, these control the padding between subplot content
(including text, ticks, etc.) rather than subplot edges. As with
``space``, these can be scalars or arrays optionally containing ``None``.
For elements equal to ``None``, the default is `innerpad`.
%(units.em)s
"""
_tight_docstring = """
wequal, hequal, equal : bool, default: :rc:`subplots.equalspace`
Whether to make the tight layout algorithm apply equal spacing
between columns, rows, or both.
wgroup, hgroup, group : bool, default: :rc:`subplots.groupspace`
Whether to make the tight layout algorithm just consider spaces between
adjacent subplots instead of entire columns and rows of subplots.
outerpad : unit-spec, default: :rc:`subplots.outerpad`
The scalar tight layout padding around the left, right, top, bottom figure edges.
%(units.em)s
innerpad : unit-spec, default: :rc:`subplots.innerpad`
The scalar tight layout padding between columns and rows. Synonymous with `pad`.
%(units.em)s
panelpad : unit-spec, default: :rc:`subplots.panelpad`
The scalar tight layout padding between subplots and their panels,
colorbars, and legends and between "stacks" of these objects.
%(units.em)s
"""
docstring._snippet_manager['gridspec.shared'] = _shared_docstring
docstring._snippet_manager['gridspec.scalar'] = _scalar_docstring
docstring._snippet_manager['gridspec.vector'] = _vector_docstring
docstring._snippet_manager['gridspec.tight'] = _tight_docstring
def _disable_method(attr):
"""
Disable the inherited method.
"""
def _dummy_method(*args):
raise RuntimeError(f'Method {attr}() is disabled on proplot gridspecs.')
_dummy_method.__name__ = attr
return _dummy_method
class _SubplotSpec(mgridspec.SubplotSpec):
"""
A thin `~matplotlib.gridspec.SubplotSpec` subclass with a nice string
representation and a few helper methods.
"""
def __repr__(self):
# NOTE: Also include panel obfuscation here to avoid confusion. If this
# is a panel slot generated internally then show zero info.
try:
nrows, ncols, num1, num2 = self._get_geometry()
except (IndexError, ValueError, AttributeError):
return 'SubplotSpec(unknown)'
else:
return f'SubplotSpec(nrows={nrows}, ncols={ncols}, index=({num1}, {num2}))'
def _get_geometry(self):
"""
Return the geometry and scalar indices relative to the "unhidden" non-panel
geometry. May trigger error if this is in a "hidden" panel slot.
"""
gs = self.get_gridspec()
num1, num2 = self.num1, self.num2
if isinstance(gs, GridSpec):
nrows, ncols = gs.get_geometry()
num1, num2 = gs._decode_indices(num1, num2) # may trigger error
return nrows, ncols, num1, num2
def _get_rows_columns(self, ncols=None):
"""
Return the row and column indices. The resulting indices include
"hidden" panel rows and columns. See `GridSpec.get_grid_positions`.
"""
# NOTE: Sort of confusing that this doesn't have 'total' in name but that
# is by analogy with get_grid_positions(). This is used for grid positioning.
gs = self.get_gridspec()
if isinstance(gs, GridSpec):
ncols = _not_none(ncols, gs.ncols_total)
else:
ncols = _not_none(ncols, gs.ncols)
row1, col1 = divmod(self.num1, ncols)
row2, col2 = divmod(self.num2, ncols)
return row1, row2, col1, col2
def get_position(self, figure, return_all=False):
# Silent override. Older matplotlib versions can create subplots
# with negative heights and widths that crash on instantiation.
# Instead better to dynamically adjust the bounding box and hope
# that subsequent adjustments will correct the subplot position.
gs = self.get_gridspec()
if isinstance(gs, GridSpec):
nrows, ncols = gs.get_total_geometry()
else:
nrows, ncols = gs.get_geometry()
rows, cols = np.unravel_index([self.num1, self.num2], (nrows, ncols))
bottoms, tops, lefts, rights = gs.get_grid_positions(figure)
bottom = bottoms[rows].min()
top = max(bottom, tops[rows].max())
left = lefts[cols].min()
right = max(left, rights[cols].max())
bbox = mtransforms.Bbox.from_extents(left, bottom, right, top)
if return_all:
return bbox, rows[0], cols[0], nrows, ncols
else:
return bbox
[docs]class GridSpec(mgridspec.GridSpec):
"""
A `~matplotlib.gridspec.GridSpec` subclass that permits variable spacing
between successive rows and columns and hides "panel slots" from indexing.
"""
def __repr__(self):
nrows, ncols = self.get_geometry()
prows, pcols = self.get_panel_geometry()
params = {'nrows': nrows, 'ncols': ncols}
if prows:
params['nrows_panel'] = prows
if pcols:
params['ncols_panel'] = pcols
params = ', '.join(f'{key}={value!r}' for key, value in params.items())
return f'GridSpec({params})'
def __getattr__(self, attr):
# Redirect to private 'layout' attributes that are fragile w.r.t.
# matplotlib version. Cannot set these by calling super().__init__()
# because we make spacing arguments non-settable properties.
if 'layout' in attr:
return None
super().__getattribute__(attr) # native error message
@docstring._snippet_manager
def __init__(self, nrows=1, ncols=1, **kwargs):
"""
Parameters
----------
nrows : int, optional
The number of rows in the subplot grid.
ncols : int, optional
The number of columns in the subplot grid.
Other parameters
----------------
%(gridspec.shared)s
%(gridspec.vector)s
%(gridspec.tight)s
See also
--------
proplot.ui.figure
proplot.figure.Figure
proplot.ui.subplots
proplot.figure.Figure.subplots
proplot.figure.Figure.add_subplots
matplotlib.gridspec.GridSpec
Important
---------
Adding axes panels, axes or figure colorbars, and axes or figure legends
quietly augments the gridspec geometry by inserting "panel slots". However,
subsequently indexing the gridspec with ``gs[num]`` or ``gs[row, col]`` will
ignore the "panel slots". This permits adding new subplots by passing
``gs[num]`` or ``gs[row, col]`` to `~proplot.figure.Figure.add_subplot`
even in the presence of panels (see `~GridSpec.__getitem__` for details).
This also means that each `GridSpec` is `~proplot.figure.Figure`-specific,
i.e. it can only be used once (if you are working with `GridSpec` instances
manually and want the same geometry for multiple figures, you must create
a copy with `GridSpec.copy` before working on the subsequent figure).
"""
# Fundamental GridSpec properties
self._nrows_total = nrows
self._ncols_total = ncols
self._left = None
self._right = None
self._bottom = None
self._top = None
self._hspace_total = [None] * (nrows - 1)
self._wspace_total = [None] * (ncols - 1)
self._hratios_total = [1] * nrows
self._wratios_total = [1] * ncols
self._left_default = None
self._right_default = None
self._bottom_default = None
self._top_default = None
self._hspace_total_default = [None] * (nrows - 1)
self._wspace_total_default = [None] * (ncols - 1)
self._figure = None # initial state
# Capture rc settings used for default spacing
# NOTE: This is consistent with conversion of 'em' units to inches on gridspec
# instantiation. In general it seems strange for future changes to rc settings
# to magically update an existing gridspec layout. This also may improve draw
# time as manual or auto figure resizes repeatedly call get_grid_positions().
scales = {'in': 0, 'inout': 0.5, 'out': 1, None: 1}
self._xtickspace = scales[rc['xtick.direction']] * rc['xtick.major.size']
self._ytickspace = scales[rc['ytick.direction']] * rc['ytick.major.size']
self._xticklabelspace = _fontsize_to_pt(rc['xtick.labelsize']) + rc['xtick.major.pad'] # noqa: E501
self._yticklabelspace = 2 * _fontsize_to_pt(rc['ytick.labelsize']) + rc['ytick.major.pad'] # noqa: E501
self._labelspace = _fontsize_to_pt(rc['axes.labelsize']) + rc['axes.labelpad']
self._titlespace = _fontsize_to_pt(rc['axes.titlesize']) + rc['axes.titlepad']
# Tight layout and panel-related properties
# NOTE: The wpanels and hpanels contain empty strings '' (indicating main axes),
# or one of 'l', 'r', 'b', 't' (indicating axes panels) or 'f' (figure panels)
outerpad = _not_none(kwargs.pop('outerpad', None), rc['subplots.outerpad'])
innerpad = _not_none(kwargs.pop('innerpad', None), rc['subplots.innerpad'])
panelpad = _not_none(kwargs.pop('panelpad', None), rc['subplots.panelpad'])
pad = _not_none(kwargs.pop('pad', None), innerpad) # alias of innerpad
self._outerpad = units(outerpad, 'em', 'in')
self._innerpad = units(innerpad, 'em', 'in')
self._panelpad = units(panelpad, 'em', 'in')
self._hpad_total = [units(pad, 'em', 'in')] * (nrows - 1)
self._wpad_total = [units(pad, 'em', 'in')] * (ncols - 1)
self._hequal = rc['subplots.equalspace']
self._wequal = rc['subplots.equalspace']
self._hgroup = rc['subplots.groupspace']
self._wgroup = rc['subplots.groupspace']
self._hpanels = [''] * nrows # axes and figure panel identification
self._wpanels = [''] * ncols
self._fpanels = { # array representation of figure panel spans
'left': np.empty((0, nrows), dtype=bool),
'right': np.empty((0, nrows), dtype=bool),
'bottom': np.empty((0, ncols), dtype=bool),
'top': np.empty((0, ncols), dtype=bool),
}
self._update_params(pad=pad, **kwargs)
[docs] def __getitem__(self, key):
"""
Get a `~matplotlib.gridspec.SubplotSpec`. "Hidden" slots allocated for axes
panels, colorbars, and legends are ignored. For example, given a gridspec with
2 subplot rows, 3 subplot columns, and a "panel" row between the subplot rows,
calling ``gs[1, 1]`` returns a `~matplotlib.gridspec.SubplotSpec` corresponding
to the central subplot on the second row rather than a "panel" slot.
"""
return self._make_subplot_spec(key, includepanels=False)
def _make_subplot_spec(self, key, includepanels=False):
"""
Generate a subplotspec either ignoring panels or including panels.
"""
# Convert the indices into endpoint-inclusive (start, stop)
def _normalize_index(key, size, axis=None): # noqa: E306
if isinstance(key, slice):
start, stop, _ = key.indices(size)
if stop > start:
return start, stop - 1
else:
if key < 0:
key += size
if 0 <= key < size:
return key, key # endpoing inclusive
extra = 'for gridspec' if axis is None else f'along axis {axis}'
raise IndexError(f'Invalid index {key} {extra} with size {size}.')
# Normalize the indices
if includepanels:
nrows, ncols = self.get_total_geometry()
else:
nrows, ncols = self.get_geometry()
if not isinstance(key, tuple): # usage gridspec[1,2]
num1, num2 = _normalize_index(key, nrows * ncols)
elif len(key) == 2:
k1, k2 = key
num1 = _normalize_index(k1, nrows, axis=0)
num2 = _normalize_index(k2, ncols, axis=1)
num1, num2 = np.ravel_multi_index((num1, num2), (nrows, ncols))
else:
raise ValueError(f'Invalid index {key!r}.')
# Return the subplotspec
if not includepanels:
num1, num2 = self._encode_indices(num1, num2)
return _SubplotSpec(self, num1, num2)
def _encode_indices(self, *args, which=None):
"""
Convert indices from the "unhidden" gridspec geometry into indices for the
total geometry. If `which` is not passed these should be flattened indices.
"""
nums = []
idxs = self._get_indices(which)
for arg in args:
try:
nums.append(idxs[arg])
except (IndexError, TypeError):
raise ValueError(f'Invalid gridspec index {arg}.')
return nums[0] if len(nums) == 1 else nums
def _decode_indices(self, *args, which=None):
"""
Convert indices from the total geometry into the "unhidden" gridspec
geometry. If `which` is not passed these should be flattened indices.
"""
nums = []
idxs = self._get_indices(which)
for arg in args:
try:
nums.append(idxs.index(arg))
except ValueError:
raise ValueError(f'Invalid gridspec index {arg}.')
return nums[0] if len(nums) == 1 else nums
def _filter_indices(self, key, panel=False):
"""
Filter the vector attribute for "unhidden" or "hidden" slots.
"""
# NOTE: Currently this is just used for unused internal properties,
# defined for consistency with the properties ending in "total".
# These may be made public in a future version.
which = key[0]
space = 'space' in key or 'pad' in key
idxs = self._get_indices(which=which, space=space, panel=panel)
vector = getattr(self, key + '_total')
return [vector[i] for i in idxs]
def _get_indices(self, which=None, space=False, panel=False):
"""
Get the indices associated with "unhidden" or "hidden" slots.
"""
if which:
panels = getattr(self, f'_{which}panels')
else:
panels = [h + w for h, w in itertools.product(self._hpanels, self._wpanels)]
if not space:
idxs = [
i for i, p in enumerate(panels) if p
]
else:
idxs = [
i for i, (p1, p2) in enumerate(zip(panels[:-1], panels[1:]))
if p1 == p2 == 'f'
or p1 in ('l', 't') and p2 in ('l', 't', '')
or p1 in ('r', 'b', '') and p2 in ('r', 'b')
]
if not panel:
length = len(panels) - 1 if space else len(panels)
idxs = [i for i in range(length) if i not in idxs]
return idxs
def _modify_subplot_geometry(self, newrow=None, newcol=None):
"""
Update the axes subplot specs by inserting rows and columns as specified.
"""
fig = self.figure
ncols = self._ncols_total - int(newcol is not None) # previous columns
inserts = (newrow, newrow, newcol, newcol)
for ax in fig._iter_axes(hidden=True, children=True):
# Get old index
# NOTE: Endpoints are inclusive, not exclusive!
if not isinstance(ax, maxes.SubplotBase):
continue
gs = ax.get_subplotspec().get_gridspec()
ss = ax.get_subplotspec().get_topmost_subplotspec()
# Get a new subplotspec
coords = list(ss._get_rows_columns(ncols=ncols))
for i in range(4):
if inserts[i] is not None and coords[i] >= inserts[i]:
coords[i] += 1
row1, row2, col1, col2 = coords
key1 = slice(row1, row2 + 1)
key2 = slice(col1, col2 + 1)
ss_new = self._make_subplot_spec((key1, key2), includepanels=True)
# Apply new subplotspec
# NOTE: We should only have one possible level of GridSpecFromSubplotSpec
# nesting -- from making side colorbars with length less than 1.
if ss is ax.get_subplotspec():
ax.set_subplotspec(ss_new)
elif ss is getattr(gs, '_subplot_spec', None):
gs._subplot_spec = ss_new
else:
raise RuntimeError('Unexpected GridSpecFromSubplotSpec nesting.')
ax._reposition_subplot()
def _parse_panel_arg(self, side, arg):
"""
Return the indices associated with a new figure panel on the specified side.
Try to find room in the current mosaic of figure panels.
"""
# Add a subplot panel. Index depends on the side
# NOTE: This always "stacks" new panels on old panels
if isinstance(arg, maxes.SubplotBase) and isinstance(arg, paxes.Axes):
slot = side[0]
ss = arg.get_subplotspec().get_topmost_subplotspec()
offset = len(arg._panel_dict[side]) + 1
row1, row2, col1, col2 = ss._get_rows_columns()
if side in ('left', 'right'):
iratio = col1 - offset if side == 'left' else col2 + offset
start, stop = row1, row2
else:
iratio = row1 - offset if side == 'top' else row2 + offset
start, stop = col1, col2
# Add a figure panel. Index depends on the side and the input 'span'
# NOTE: Here the 'span' indices start at '1' by analogy with add_subplot()
# integers and with main subplot numbers. Also *ignores panel slots*.
# NOTE: This only "stacks" panels if requested slots are filled. Slots are
# tracked with figure panel array (a boolean mask where each row corresponds
# to a panel, moving toward the outside, and True indicates a slot is filled).
elif (
arg is None or isinstance(arg, Integral)
or np.iterable(arg) and all(isinstance(_, Integral) for _ in arg)
):
slot = 'f'
array = self._fpanels[side]
nacross = self._ncols_total if side in ('left', 'right') else self._nrows_total # noqa: E501
npanels, nalong = array.shape
arg = np.atleast_1d(_not_none(arg, (1, nalong)))
if arg.size not in (1, 2):
raise ValueError(f'Invalid span={arg!r}. Must be scalar or 2-tuple of coordinates.') # noqa: E501
if any(s < 1 or s > nalong for s in arg):
raise ValueError(f'Invalid span={arg!r}. Coordinates must satisfy 1 <= c <= {nalong}.') # noqa: E501
start, stop = arg[0] - 1, arg[-1] # non-inclusive starting at zero
iratio = -1 if side in ('left', 'top') else nacross # default values
for i in range(npanels): # possibly use existing panel slot
if not any(array[i, start:stop]):
array[i, start:stop] = True
if side in ('left', 'top'): # descending moves us closer to 0
iratio = npanels - 1 - i # index in ratios array
else: # descending array moves us closer to nacross - 1
iratio = nacross - (npanels - i) # index in ratios array
break
if iratio == -1 or iratio == nacross: # no slots so we must add to array
iarray = np.zeros((1, nalong), dtype=bool)
iarray[0, start:stop] = True
array = np.concatenate((array, iarray), axis=0)
self._fpanels[side] = array # replace array
which = 'h' if side in ('left', 'right') else 'w'
start, stop = self._encode_indices(start, stop - 1, which=which)
else:
raise ValueError(f'Invalid panel argument {arg!r}.')
# Return subplotspec indices
# NOTE: Convert using the lengthwise indices
return slot, iratio, slice(start, stop + 1)
def _insert_panel_slot(
self, side, arg, *, share=None, width=None, space=None, pad=None, filled=False,
):
"""
Insert a panel slot into the existing gridspec. The `side` is the panel side
and the `arg` is either an axes instance or the figure row-column span.
"""
# Parse input args and get user-input properties, default properties
fig = self.figure
if fig is None:
raise RuntimeError('Figure must be assigned to gridspec.')
if side not in ('left', 'right', 'bottom', 'top'):
raise ValueError(f'Invalid side {side}.')
slot, idx, span = self._parse_panel_arg(side, arg)
pad = units(pad, 'em', 'in')
space = units(space, 'em', 'in')
width = units(width, 'in')
share = False if filled else share if share is not None else True
which = 'w' if side in ('left', 'right') else 'h'
panels = getattr(self, f'_{which}panels')
pads = getattr(self, f'_{which}pad_total') # no copies!
ratios = getattr(self, f'_{which}ratios_total')
spaces = getattr(self, f'_{which}space_total')
spaces_default = getattr(self, f'_{which}space_total_default')
new_outer_slot = idx in (-1, len(panels))
new_inner_slot = not new_outer_slot and panels[idx] != slot
# Retrieve default spaces
# NOTE: Cannot use 'wspace' and 'hspace' for top and right colorbars because
# that adds an unnecessary tick space. So bypass _get_default_space totally.
pad_default = (
self._panelpad
if slot != 'f'
or side in ('left', 'top') and panels[0] == 'f'
or side in ('right', 'bottom') and panels[-1] == 'f'
else self._innerpad
)
inner_space_default = (
_not_none(pad, pad_default)
if side in ('top', 'right')
else self._get_default_space(
'hspace_total' if side == 'bottom' else 'wspace_total',
title=False, # no title between subplot and panel
share=3 if share else 0, # space for main subplot labels
pad=_not_none(pad, pad_default),
)
)
outer_space_default = self._get_default_space(
'bottom' if not share and side == 'top'
else 'left' if not share and side == 'right'
else side,
title=True, # room for titles deflected above panels
pad=self._outerpad if new_outer_slot else self._innerpad,
)
if new_inner_slot:
outer_space_default += self._get_default_space(
'hspace_total' if side in ('bottom', 'top') else 'wspace_total',
share=None, # use external share setting
pad=0, # use no additional padding
)
width_default = units(
rc['colorbar.width' if filled else 'subplots.panelwidth'], 'in'
)
# Adjust space, ratio, and panel indicator arrays
# If slot exists, overwrite width, pad, space if they were provided by the user
# If slot does not exist, modify gemoetry and add insert new spaces
attr = 'ncols' if side in ('left', 'right') else 'nrows'
idx_offset = int(side in ('top', 'left'))
idx_inner_space = idx - int(side in ('bottom', 'right')) # inner colorbar space
idx_outer_space = idx - int(side in ('top', 'left')) # outer colorbar space
if new_outer_slot or new_inner_slot:
idx += idx_offset
idx_inner_space += idx_offset
idx_outer_space += idx_offset
newcol, newrow = (idx, None) if attr == 'ncols' else (None, idx)
setattr(self, f'_{attr}_total', 1 + getattr(self, f'_{attr}_total'))
panels.insert(idx, slot)
ratios.insert(idx, _not_none(width, width_default))
pads.insert(idx_inner_space, _not_none(pad, pad_default))
spaces.insert(idx_inner_space, space)
spaces_default.insert(idx_inner_space, inner_space_default)
if new_inner_slot:
spaces_default.insert(idx_outer_space, outer_space_default)
else:
setattr(self, f'_{side}_default', outer_space_default)
else:
newrow = newcol = None
spaces_default[idx_inner_space] = inner_space_default
if width is not None:
ratios[idx] = width
if pad is not None:
pads[idx_inner_space] = pad
if space is not None:
spaces[idx_inner_space] = space
# Update the figure and axes and return a SubplotSpec
# NOTE: For figure panels indices are determined by user-input spans.
self._modify_subplot_geometry(newrow, newcol)
figsize = self._update_figsize()
if figsize is not None:
fig.set_size_inches(figsize, internal=True, forward=False)
else:
self.update()
key = (span, idx) if side in ('left', 'right') else (idx, span)
ss = self._make_subplot_spec(key, includepanels=True) # bypass obfuscation
return ss, share
def _get_space(self, key):
"""
Return the currently active vector inner space or scalar outer space
accounting for both default values and explicit user overrides.
"""
# NOTE: Default panel spaces should have been filled by _insert_panel_slot.
# They use 'panelpad' and the panel-local 'share' setting. This function
# instead fills spaces between subplots depending on sharing setting.
fig = self.figure
if not fig:
raise ValueError('Figure must be assigned to get grid positions.')
attr = f'_{key}' # user-specified
attr_default = f'_{key}_default' # default values
value = getattr(self, attr)
value_default = getattr(self, attr_default)
if key in ('left', 'right', 'bottom', 'top'):
if value_default is None:
value_default = self._get_default_space(key)
setattr(self, attr_default, value_default)
return _not_none(value, value_default)
elif key in ('wspace_total', 'hspace_total'):
result = []
for i, (val, val_default) in enumerate(zip(value, value_default)):
if val_default is None:
val_default = self._get_default_space(key)
value_default[i] = val_default
result.append(_not_none(val, val_default))
return result
else:
raise ValueError(f'Unknown space parameter {key!r}.')
def _get_default_space(self, key, pad=None, share=None, title=True):
"""
Return suitable default scalar inner or outer space given a shared axes
setting. This is only relevant when "tight layout" is disabled.
"""
# NOTE: Internal spacing args are stored in inches to simplify the
# get_grid_positions() calculations.
fig = self.figure
if fig is None:
raise RuntimeError('Figure must be assigned.')
if key == 'right':
pad = _not_none(pad, self._outerpad)
space = 0
elif key == 'top':
pad = _not_none(pad, self._outerpad)
space = self._titlespace if title else 0
elif key == 'left':
pad = _not_none(pad, self._outerpad)
space = self._labelspace + self._yticklabelspace + self._ytickspace
elif key == 'bottom':
pad = _not_none(pad, self._outerpad)
space = self._labelspace + self._xticklabelspace + self._xtickspace
elif key == 'wspace_total':
pad = _not_none(pad, self._innerpad)
share = _not_none(share, fig._sharey, 0)
space = self._ytickspace
if share < 3:
space += self._yticklabelspace
if share < 1:
space += self._labelspace
elif key == 'hspace_total':
pad = _not_none(pad, self._innerpad)
share = _not_none(share, fig._sharex, 0)
space = self._xtickspace
if title:
space += self._titlespace
if share < 3:
space += self._xticklabelspace
if share < 1:
space += self._labelspace
else:
raise ValueError(f'Invalid space key {key!r}.')
return pad + space / 72
def _get_tight_space(self, w):
"""
Get tight layout spaces between the input subplot rows or columns.
"""
# Get constants
fig = self.figure
if not fig:
return
if w == 'w':
x, y = 'xy'
group = self._wgroup
nacross = self.nrows_total
space = self.wspace_total
pad = self.wpad_total
else:
x, y = 'yx'
group = self._hgroup
nacross = self.ncols_total
space = self.hspace_total
pad = self.hpad_total
# Iterate along each row or column space
axs = tuple(fig._iter_axes(hidden=True, children=False))
space = list(space) # a copy
ralong = np.array([ax._range_subplotspec(x) for ax in axs])
racross = np.array([ax._range_subplotspec(y) for ax in axs])
for i, (s, p) in enumerate(zip(space, pad)):
# Find axes that abutt aginst this row or column space
groups = []
for j in range(nacross): # e.g. each row
# Get the indices for axes that meet this row or column edge.
# NOTE: Rigorously account for empty and overlapping slots here
filt = (racross[:, 0] <= j) & (j <= racross[:, 1])
if sum(filt) < 2:
continue # no interface
ii = i
idx1 = idx2 = np.array(())
while ii >= 0 and idx1.size == 0:
filt1 = ralong[:, 1] == ii # i.e. r / b edge abutts against this
idx1, = np.where(filt & filt1)
ii -= 1
ii = i + 1
while ii <= len(space) and idx2.size == 0:
filt2 = ralong[:, 0] == ii # i.e. l / t edge abutts against this
idx2, = np.where(filt & filt2)
ii += 1
# Put axes into unique groups and store as (l, r) or (b, t) pairs.
axs1, axs2 = [axs[_] for _ in idx1], [axs[_] for _ in idx2]
if x != 'x': # order bottom-to-top
axs1, axs2 = axs2, axs1
for (group1, group2) in groups:
if any(_ in group1 for _ in axs1) or any(_ in group2 for _ in axs2):
group1.update(axs1)
group2.update(axs2)
break
else:
if axs1 and axs2:
groups.append((set(axs1), set(axs2))) # form new group
# Determing the spaces using cached tight bounding boxes
# NOTE: Set gridspec space to zero if there are no adjacent edges
if not group:
groups = [(
set(ax for (group1, _) in groups for ax in group1),
set(ax for (_, group2) in groups for ax in group2),
)]
margins = []
for (group1, group2) in groups:
x1 = max(ax._range_tightbbox(x)[1] for ax in group1)
x2 = min(ax._range_tightbbox(x)[0] for ax in group2)
margins.append((x2 - x1) / self.figure.dpi)
s = 0 if not margins else max(0, s - min(margins) + p)
space[i] = s
return space
def _auto_layout_aspect(self):
"""
Update the underlying default aspect ratio.
"""
# Get the axes
fig = self.figure
if not fig:
return
ax = fig._subplot_dict.get(fig._refnum, None)
if ax is None:
return
# Get aspect ratio
ratio = ax.get_aspect() # the aspect ratio in *data units*
if ratio == 'auto':
return
elif ratio == 'equal':
ratio = 1
elif isinstance(ratio, str):
raise RuntimeError(f'Unknown aspect ratio mode {ratio!r}.')
else:
ratio = 1 / ratio
# Compare to current aspect after scaling by data ratio
# Noat matplotlib 3.2.0 expanded get_data_ratio to work for all axis scales:
# https://github.com/matplotlib/matplotlib/commit/87c742b99dc6b9a190f8c89bc6256ced72f5ab80 # noqa: E501
aspect = ratio / ax.get_data_ratio()
if fig._refaspect is not None:
return # fixed by user
if np.isclose(aspect, fig._refaspect_default):
return # close enough to the default aspect
fig._refaspect_default = aspect
# Update the layout
figsize = self._update_figsize()
if not fig._is_same_size(figsize):
fig.set_size_inches(figsize, internal=True)
def _auto_layout_tight(self, renderer):
"""
Update the underlying spaces with tight layout values. If `resize` is
``True`` and the auto figure size has changed then update the figure
size. Either way always update the subplot positions.
"""
# Initial stuff
fig = self.figure
if not fig:
return
if not any(fig._iter_axes(hidden=True, children=False)):
return # skip tight layout if there are no subplots in the figure
# Get the tight bounding box around the whole figure.
# NOTE: This triggers proplot.axes.Axes.get_tightbbox which *caches* the
# computed bounding boxes used by _range_tightbbox below.
pad = self._outerpad
obox = fig.bbox_inches # original bbox
bbox = fig.get_tightbbox(renderer)
# Calculate new figure margins
# NOTE: Negative spaces are common where entire rows/columns of gridspec
# are empty but it seems to result in wrong figure size + grid positions. Not
# worth correcting so instead enforce positive margin sizes. Will leave big
# empty slot but that is probably what should happen under this scenario.
left = self.left
bottom = self.bottom
right = self.right
top = self.top
self._left_default = max(0, left - (bbox.xmin - 0) + pad)
self._bottom_default = max(0, bottom - (bbox.ymin - 0) + pad)
self._right_default = max(0, right - (obox.xmax - bbox.xmax) + pad)
self._top_default = max(0, top - (obox.ymax - bbox.ymax) + pad)
# Calculate new subplot row and column spaces. Enforce equal
# default spaces between main subplot edges if requested.
hspace = self._get_tight_space('h')
wspace = self._get_tight_space('w')
if self._hequal:
idxs = self._get_indices('h', space=True)
space = max(hspace[i] for i in idxs)
for i in idxs:
hspace[i] = space
if self._wequal:
idxs = self._get_indices('w', space=True)
space = max(wspace[i] for i in idxs)
for i in idxs:
wspace[i] = space
self._hspace_total_default = hspace
self._wspace_total_default = wspace
# Update the layout
# NOTE: fig.set_size_inches() always updates the gridspec to enforce fixed
# spaces (necessary since native position coordinates are figure-relative)
# and to enforce fixed panel ratios. So only self.update() if we skip resize.
figsize = self._update_figsize()
if not fig._is_same_size(figsize):
fig.set_size_inches(figsize, internal=True)
else:
self.update()
def _update_figsize(self):
"""
Return an updated auto layout figure size accounting for the
gridspec and figure parameters. May or may not need to be applied.
"""
fig = self.figure
if fig is None: # drawing before subplots are added?
return
ax = fig._subplot_dict.get(fig._refnum, None)
if ax is None: # drawing before subplots are added?
return
ss = ax.get_subplotspec().get_topmost_subplotspec()
y1, y2, x1, x2 = ss._get_rows_columns()
refhspace = sum(self.hspace_total[y1:y2])
refwspace = sum(self.wspace_total[x1:x2])
refhpanel = sum(self.hratios_total[i] for i in range(y1, y2 + 1) if self._hpanels[i]) # noqa: E501
refwpanel = sum(self.wratios_total[i] for i in range(x1, x2 + 1) if self._wpanels[i]) # noqa: E501
refhsubplot = sum(self.hratios_total[i] for i in range(y1, y2 + 1) if not self._hpanels[i]) # noqa: E501
refwsubplot = sum(self.wratios_total[i] for i in range(x1, x2 + 1) if not self._wpanels[i]) # noqa: E501
# Get the reference sizes
# NOTE: The sizing arguments should have been normalized already
figwidth, figheight = fig._figwidth, fig._figheight
refwidth, refheight = fig._refwidth, fig._refheight
refaspect = _not_none(fig._refaspect, fig._refaspect_default)
if refheight is None and figheight is None:
if figwidth is not None:
gridwidth = figwidth - self.spacewidth - self.panelwidth
refwidth = gridwidth * refwsubplot / self.gridwidth
if refwidth is not None: # WARNING: do not change to elif!
refheight = refwidth / refaspect
else:
raise RuntimeError('Figure size arguments are all missing.')
if refwidth is None and figwidth is None:
if figheight is not None:
gridheight = figheight - self.spaceheight - self.panelheight
refheight = gridheight * refhsubplot / self.gridheight
if refheight is not None:
refwidth = refheight * refaspect
else:
raise RuntimeError('Figure size arguments are all missing.')
# Get the auto figure size. Might trigger 'not enough room' error later
# NOTE: For e.g. [[1, 1, 2, 2], [0, 3, 3, 0]] we make sure to still scale the
# reference axes like a square even though takes two columns of gridspec.
if refheight is not None:
refheight -= refhspace + refhpanel
gridheight = refheight * self.gridheight / refhsubplot
figheight = gridheight + self.spaceheight + self.panelheight
if refwidth is not None:
refwidth -= refwspace + refwpanel
gridwidth = refwidth * self.gridwidth / refwsubplot
figwidth = gridwidth + self.spacewidth + self.panelwidth
# Return the figure size
figsize = (figwidth, figheight)
if all(np.isfinite(figsize)):
return figsize
else:
warnings._warn_proplot(f'Auto resize failed. Invalid figsize {figsize}.')
def _update_params(
self, *,
left=None, bottom=None, right=None, top=None,
wspace=None, hspace=None, space=None,
wpad=None, hpad=None, pad=None,
wequal=None, hequal=None, equal=None,
wgroup=None, hgroup=None, group=None,
outerpad=None, innerpad=None, panelpad=None,
hratios=None, wratios=None, width_ratios=None, height_ratios=None,
):
"""
Update the user-specified properties.
"""
# Assign scalar args
# WARNING: The key signature here is critical! Used in ui.py to
# separate out figure keywords and gridspec keywords.
def _assign_scalar(key, value, convert=True):
if value is None:
return
if not np.isscalar(value):
raise ValueError(f'Unexpected {key}={value!r}. Must be scalar.')
if convert:
value = units(value, 'em', 'in')
setattr(self, f'_{key}', value)
hequal = _not_none(hequal, equal)
wequal = _not_none(wequal, equal)
hgroup = _not_none(hgroup, group)
wgroup = _not_none(wgroup, group)
_assign_scalar('left', left)
_assign_scalar('right', right)
_assign_scalar('bottom', bottom)
_assign_scalar('top', top)
_assign_scalar('panelpad', panelpad)
_assign_scalar('outerpad', outerpad)
_assign_scalar('innerpad', innerpad)
_assign_scalar('hequal', hequal, convert=False)
_assign_scalar('wequal', wequal, convert=False)
_assign_scalar('hgroup', hgroup, convert=False)
_assign_scalar('wgroup', wgroup, convert=False)
# Assign vector args
# NOTE: Here we employ obfuscation that skips 'panel' indices. So users could
# still call self.update(wspace=[1, 2]) even if there is a right-axes panel
# between each subplot. To control panel spaces users should instead pass
# 'pad' or 'space' to panel_axes(), colorbar(), or legend() on creation.
def _assign_vector(key, values, space):
if values is None:
return
idxs = self._get_indices(key[0], space=space)
nidxs = len(idxs)
values = np.atleast_1d(values)
if values.size == 1:
values = np.repeat(values, nidxs)
if values.size != nidxs:
raise ValueError(f'Expected len({key}) == {nidxs}. Got {values.size}.')
list_ = getattr(self, f'_{key}_total')
for i, value in enumerate(values):
if value is None:
continue
list_[idxs[i]] = value
if pad is not None and not np.isscalar(pad):
raise ValueError(f'Parameter pad={pad!r} must be scalar.')
if space is not None and not np.isscalar(space):
raise ValueError(f'Parameter space={space!r} must be scalar.')
hpad = _not_none(hpad, pad)
wpad = _not_none(wpad, pad)
hpad = units(hpad, 'em', 'in')
wpad = units(wpad, 'em', 'in')
hspace = _not_none(hspace, space)
wspace = _not_none(wspace, space)
hspace = units(hspace, 'em', 'in')
wspace = units(wspace, 'em', 'in')
hratios = _not_none(hratios=hratios, height_ratios=height_ratios)
wratios = _not_none(wratios=wratios, width_ratios=width_ratios)
_assign_vector('hpad', hpad, space=True)
_assign_vector('wpad', wpad, space=True)
_assign_vector('hspace', hspace, space=True)
_assign_vector('wspace', wspace, space=True)
_assign_vector('hratios', hratios, space=False)
_assign_vector('wratios', wratios, space=False)
[docs] @docstring._snippet_manager
def copy(self, **kwargs):
"""
Return a copy of the `GridSpec` with the `~proplot.figure.Figure`-specific
"panel slots" removed. This can be useful if you want to draw multiple
figures with the same geometry. Properties are inherited from this
`GridSpec` by default but can be changed by passing keyword arguments.
Parameters
----------
%(gridspec.shared)s
%(gridspec.vector)s
%(gridspec.tight)s
See also
--------
GridSpec.update
"""
# WARNING: For some reason copy.copy() fails. Updating e.g. wpanels
# and hpanels on the copy also updates this object. No idea why.
nrows, ncols = self.get_geometry()
gs = GridSpec(nrows, ncols)
hidxs = self._get_indices('h')
widxs = self._get_indices('w')
gs._hratios_total = [self._hratios_total[i] for i in hidxs]
gs._wratios_total = [self._wratios_total[i] for i in widxs]
hidxs = self._get_indices('h', space=True)
widxs = self._get_indices('w', space=True)
gs._hpad_total = [self._hpad_total[i] for i in hidxs]
gs._wpad_total = [self._wpad_total[i] for i in widxs]
gs._hspace_total = [self._hspace_total[i] for i in hidxs]
gs._wspace_total = [self._wspace_total[i] for i in widxs]
gs._hspace_total_default = [self._hspace_total_default[i] for i in hidxs]
gs._wspace_total_default = [self._wspace_total_default[i] for i in widxs]
for key in (
'left', 'right', 'bottom', 'top', 'labelspace', 'titlespace',
'xtickspace', 'ytickspace', 'xticklabelspace', 'yticklabelspace',
'outerpad', 'innerpad', 'panelpad', 'hequal', 'wequal',
):
value = getattr(self, '_' + key)
setattr(gs, '_' + key, value)
gs.update(**kwargs)
return gs
[docs] def get_geometry(self):
"""
Return the number of "unhidden" non-panel rows and columns in the grid
(see `GridSpec` for details).
See also
--------
GridSpec.get_panel_geometry
GridSpec.get_total_geometry
"""
nrows, ncols = self.get_total_geometry()
nrows_panels, ncols_panels = self.get_panel_geometry()
return nrows - nrows_panels, ncols - ncols_panels
[docs] def get_panel_geometry(self):
"""
Return the number of "hidden" panel rows and columns in the grid
(see `GridSpec` for details).
See also
--------
GridSpec.get_geometry
GridSpec.get_total_geometry
"""
nrows = sum(map(bool, self._hpanels))
ncols = sum(map(bool, self._wpanels))
return nrows, ncols
[docs] def get_total_geometry(self):
"""
Return the total number of "unhidden" and "hidden" rows and columns
in the grid (see `GridSpec` for details).
See also
--------
GridSpec.get_geometry
GridSpec.get_panel_geometry
GridSpec.get_grid_positions
"""
return self._nrows_total, self._ncols_total
[docs] def get_grid_positions(self, figure=None):
"""
Return the subplot grid positions allowing for variable inter-subplot
spacing and using physical units for the spacing terms. The resulting
positions include "hidden" panel rows and columns.
Note
----
The physical units for positioning grid cells are converted from em-widths to
inches when the `GridSpec` is instantiated. This means that subsequent changes
to :rcraw:`font.size` will have no effect on the spaces. This is consistent
with :rcraw:`font.size` having no effect on already-instantiated figures.
See also
--------
GridSpec.get_total_geometry
"""
# Grab the figure size
if not self.figure:
self._figure = figure
if not self.figure:
raise RuntimeError('Figure must be assigned to gridspec.')
if figure is not self.figure:
raise RuntimeError(f'Input figure {figure} does not match gridspec figure {self.figure}.') # noqa: E501
fig = _not_none(figure, self.figure)
figwidth, figheight = fig.get_size_inches()
spacewidth, spaceheight = self.spacewidth, self.spaceheight
panelwidth, panelheight = self.panelwidth, self.panelheight
hratios, wratios = self.hratios_total, self.wratios_total
hidxs, widxs = self._get_indices('h'), self._get_indices('w')
# Scale the subplot slot ratios and keep the panel slots fixed
hsubplot = np.array([hratios[i] for i in hidxs])
wsubplot = np.array([wratios[i] for i in widxs])
hsubplot = (figheight - panelheight - spaceheight) * hsubplot / np.sum(hsubplot)
wsubplot = (figwidth - panelwidth - spacewidth) * wsubplot / np.sum(wsubplot)
for idx, ratio in zip(hidxs, hsubplot):
hratios[idx] = ratio # modify the main subplot ratios
for idx, ratio in zip(widxs, wsubplot):
wratios[idx] = ratio
# Calculate accumulated heights of columns
norm = (figheight - spaceheight) / (figheight * sum(hratios))
if norm < 0:
raise RuntimeError(
'Not enough room for axes. Try increasing the figure height or '
"decreasing the 'top', 'bottom', or 'hspace' gridspec spaces."
)
cell_heights = [r * norm for r in hratios]
sep_heights = [0] + [s / figheight for s in self.hspace_total]
heights = np.cumsum(np.column_stack([sep_heights, cell_heights]).flat)
# Calculate accumulated widths of rows
norm = (figwidth - spacewidth) / (figwidth * sum(wratios))
if norm < 0:
raise RuntimeError(
'Not enough room for axes. Try increasing the figure width or '
"decreasing the 'left', 'right', or 'wspace' gridspec spaces."
)
cell_widths = [r * norm for r in wratios]
sep_widths = [0] + [s / figwidth for s in self.wspace_total]
widths = np.cumsum(np.column_stack([sep_widths, cell_widths]).flat)
# Return the figure coordinates
tops, bottoms = (1 - self.top / figheight - heights).reshape((-1, 2)).T
lefts, rights = (self.left / figwidth + widths).reshape((-1, 2)).T
return bottoms, tops, lefts, rights
[docs] @docstring._snippet_manager
def update(self, **kwargs):
"""
Update the gridspec with arbitrary initialization keyword arguments
and update the subplot positions.
Parameters
----------
%(gridspec.shared)s
%(gridspec.vector)s
%(gridspec.tight)s
See also
--------
GridSpec.copy
"""
# Apply positions to all axes
# NOTE: This uses the current figure size to fix panel widths
# and determine physical grid spacing.
self._update_params(**kwargs)
fig = self.figure
if fig is None:
return
for ax in fig.axes:
if not isinstance(ax, maxes.SubplotBase):
continue
ss = ax.get_subplotspec().get_topmost_subplotspec()
if ss.get_gridspec() is not self: # should be impossible
continue
ax._reposition_subplot()
fig.stale = True
@property
def figure(self):
"""
The `proplot.figure.Figure` uniquely associated with this `GridSpec`.
On assignment the gridspec parameters and figure size are updated.
See also
--------
proplot.gridspec.SubplotGrid.figure
proplot.figure.Figure.gridspec
"""
return self._figure
@figure.setter
def figure(self, fig):
from .figure import Figure
if not isinstance(fig, Figure):
raise ValueError('Figure must be a proplot figure.')
if self._figure and self._figure is not fig:
raise ValueError(
'Cannot use the same gridspec for multiple figures. '
'Please use gridspec.copy() to make a copy.'
)
self._figure = fig
self._update_params(**fig._gridspec_params)
fig._gridspec_params.clear()
figsize = self._update_figsize()
if figsize is not None:
fig.set_size_inches(figsize, internal=True, forward=False)
else:
self.update()
# Delete attributes. Don't like having special setters and getters for some
# settings and not others. Width and height ratios can be updated with update().
# Also delete obsolete 'subplotpars' and built-in tight layout function.
tight_layout = _disable_method('tight_layout') # instead use custom tight layout
subgridspec = _disable_method('subgridspec') # instead use variable spaces
get_width_ratios = _disable_method('get_width_ratios')
get_height_ratios = _disable_method('get_height_ratios')
set_width_ratios = _disable_method('set_width_ratios')
set_height_ratios = _disable_method('set_height_ratios')
get_subplot_params = _disable_method('get_subplot_params')
locally_modified_subplot_params = _disable_method('locally_modified_subplot_params')
# Immutable helper properties used to calculate figure size and subplot positions
# NOTE: The spaces are auto-filled with defaults wherever user left them unset
gridheight = property(lambda self: sum(self.hratios))
gridwidth = property(lambda self: sum(self.wratios))
panelheight = property(lambda self: sum(self.hratios_panel))
panelwidth = property(lambda self: sum(self.wratios_panel))
spaceheight = property(lambda self: self.bottom + self.top + sum(self.hspace_total))
spacewidth = property(lambda self: self.left + self.right + sum(self.wspace_total))
# Geometry properties. These are included for consistency with get_geometry
# functions (would be really confusing if self.nrows, self.ncols disagree).
nrows = property(lambda self: self._nrows_total - sum(map(bool, self._hpanels)), doc='') # noqa: E501
ncols = property(lambda self: self._ncols_total - sum(map(bool, self._wpanels)), doc='') # noqa: E501
nrows_panel = property(lambda self: sum(map(bool, self._hpanels)))
ncols_panel = property(lambda self: sum(map(bool, self._wpanels)))
nrows_total = property(lambda self: self._nrows_total)
ncols_total = property(lambda self: self._ncols_total)
# Make formerly public instance-level attributes immutable and redirect space
# properties so they try to retrieve user settings then fallback to defaults.
# NOTE: These are undocumented for the time being. Generally properties should
# be changed with update() and introspection not really necessary.
left = property(lambda self: self._get_space('left'))
bottom = property(lambda self: self._get_space('bottom'))
right = property(lambda self: self._get_space('right'))
top = property(lambda self: self._get_space('top'))
hratios = property(lambda self: self._filter_indices('hratios', panel=False))
wratios = property(lambda self: self._filter_indices('wratios', panel=False))
hratios_panel = property(lambda self: self._filter_indices('hratios', panel=True))
wratios_panel = property(lambda self: self._filter_indices('wratios', panel=True))
hratios_total = property(lambda self: list(self._hratios_total))
wratios_total = property(lambda self: list(self._wratios_total))
hspace = property(lambda self: self._filter_indices('hspace', panel=False))
wspace = property(lambda self: self._filter_indices('wspace', panel=False))
hspace_panel = property(lambda self: self._filter_indices('hspace', panel=True))
wspace_panel = property(lambda self: self._filter_indices('wspace', panel=True))
hspace_total = property(lambda self: self._get_space('hspace_total'))
wspace_total = property(lambda self: self._get_space('wspace_total'))
hpad = property(lambda self: self._filter_indices('hpad', panel=False))
wpad = property(lambda self: self._filter_indices('wpad', panel=False))
hpad_panel = property(lambda self: self._filter_indices('hpad', panel=True))
wpad_panel = property(lambda self: self._filter_indices('wpad', panel=True))
hpad_total = property(lambda self: list(self._hpad_total))
wpad_total = property(lambda self: list(self._wpad_total))
[docs]class SubplotGrid(MutableSequence, list):
"""
List-like, array-like object used to store subplots returned by
`~proplot.figure.Figure.subplots`. 1D indexing uses the underlying list of
`~proplot.axes.Axes` while 2D indexing uses the `~SubplotGrid.gridspec`.
See `~SubplotGrid.__getitem__` for details.
"""
def __repr__(self):
if not self:
return 'SubplotGrid(length=0)'
length = len(self)
nrows, ncols = self.gridspec.get_geometry()
return f'SubplotGrid(nrows={nrows}, ncols={ncols}, length={length})'
def __str__(self):
return self.__repr__()
def __len__(self):
return list.__len__(self)
def insert(self, key, value): # required for MutableSequence
value = self._validate_item(value, scalar=True)
list.insert(self, key, value)
def __init__(self, sequence=None, **kwargs):
"""
Parameters
----------
sequence : sequence
A sequence of `proplot.axes.Axes` subplots or their children.
See also
--------
proplot.ui.subplots
proplot.figure.Figure.subplots
proplot.figure.Figure.add_subplots
"""
n = kwargs.pop('n', None)
order = kwargs.pop('order', None)
if n is not None or order is not None:
warnings._warn_proplot(
f'Ignoring n={n!r} and order={order!r}. As of v0.8 SubplotGrid '
'handles 2D indexing by leveraging the subplotspec extents rather than '
'directly emulating 2D array indexing. These arguments are no longer '
'needed and will be removed in a future release.'
)
sequence = _not_none(sequence, [])
sequence = self._validate_item(sequence, scalar=False)
super().__init__(sequence, **kwargs)
[docs] def __getattr__(self, attr):
"""
Get a missing attribute. Simply redirects to the axes if the `SubplotGrid`
is singleton and raises an error otherwise. This can be convenient for
single-axes figures generated with `~proplot.figure.Figure.subplots`.
"""
# Redirect to the axes
if not self or attr[:1] == '_':
return super().__getattribute__(attr) # trigger default error
if len(self) == 1:
return getattr(self[0], attr)
# Obscure deprecated behavior
# WARNING: This is now deprecated! Instead we dynamically define a few
# dedicated relevant commands that can be called from the grid (see below).
import functools
warnings._warn_proplot(
'Calling arbitrary axes methods from SubplotGrid was deprecated in v0.8 '
'and will be removed in a future release. Please index the grid or loop '
'over the grid instead.'
)
if not self:
return None
objs = tuple(getattr(ax, attr) for ax in self) # may raise error
if not any(map(callable, objs)):
return objs[0] if len(self) == 1 else objs
elif all(map(callable, objs)):
@functools.wraps(objs[0])
def _iterate_subplots(*args, **kwargs):
result = []
for func in objs:
result.append(func(*args, **kwargs))
if len(self) == 1:
return result[0]
elif all(res is None for res in result):
return None
elif all(isinstance(res, paxes.Axes) for res in result):
return SubplotGrid(result, n=self._n, order=self._order)
else:
return tuple(result)
_iterate_subplots.__doc__ = inspect.getdoc(objs[0])
return _iterate_subplots
else:
raise AttributeError(f'Found mixed types for attribute {attr!r}.')
[docs] def __getitem__(self, key):
"""
Get an axes.
Parameters
----------
key : int, slice, or 2-tuple
The index. If 1D then the axes in the corresponding
sublist are returned. If 2D then the axes that intersect
the corresponding `~SubplotGrid.gridspec` slots are returned.
Returns
-------
axs : proplot.axes.Axes or SubplotGrid
The axes. If the index included slices then
another `SubplotGrid` is returned.
Example
-------
>>> import proplot as pplt
>>> fig, axs = pplt.subplots(nrows=3, ncols=3)
>>> axs[5] # the subplot in the second row, third column
>>> axs[1, 2] # the subplot in the second row, third column
>>> axs[:, 0] # a SubplotGrid containing the subplots in the first column
"""
if isinstance(key, tuple) and len(key) == 1:
key = key[0]
# List-style indexing
if isinstance(key, (Integral, slice)):
slices = isinstance(key, slice)
objs = list.__getitem__(self, key)
# Gridspec-style indexing
elif (
isinstance(key, tuple)
and len(key) == 2
and all(isinstance(ikey, (Integral, slice)) for ikey in key)
):
# WARNING: Permit no-op slicing of empty grids here
slices = any(isinstance(ikey, slice) for ikey in key)
objs = []
if self:
gs = self.gridspec
ss_key = gs._make_subplot_spec(key) # obfuscates panels
row1_key, col1_key = divmod(ss_key.num1, gs.ncols)
row2_key, col2_key = divmod(ss_key.num2, gs.ncols)
for ax in self:
ss = ax._get_topmost_axes().get_subplotspec().get_topmost_subplotspec()
row1, col1 = divmod(ss.num1, gs.ncols)
row2, col2 = divmod(ss.num2, gs.ncols)
inrow = row1_key <= row1 <= row2_key or row1_key <= row2 <= row2_key
incol = col1_key <= col1 <= col2_key or col1_key <= col2 <= col2_key
if inrow and incol:
objs.append(ax)
if not slices and len(objs) == 1: # accounts for overlapping subplots
objs = objs[0]
else:
raise IndexError(f'Invalid index {key!r}.')
if isinstance(objs, list):
return SubplotGrid(objs)
else:
return objs
[docs] def __setitem__(self, key, value):
"""
Add an axes.
Parameters
----------
key : int or slice
The 1D index.
value : `proplot.axes.Axes`
The proplot subplot or its child or panel axes,
or a sequence thereof if the index was a slice.
"""
if isinstance(key, Integral):
value = self._validate_item(value, scalar=True)
elif isinstance(key, slice):
value = self._validate_item(value, scalar=False)
else:
raise IndexError('Multi dimensional item assignment is not supported.')
return super().__setitem__(key, value) # could be list[:] = [1, 2, 3]
@classmethod
def _add_command(cls, src, name):
"""
Add a `SubplotGrid` method that iterates through axes methods.
"""
# Create the method
def _grid_command(self, *args, **kwargs):
objs = []
for ax in self:
obj = getattr(ax, name)(*args, **kwargs)
objs.append(obj)
return SubplotGrid(objs)
# Clean the docstring
cmd = getattr(src, name)
doc = inspect.cleandoc(cmd.__doc__) # dedents
dot = doc.find('.')
if dot != -1:
doc = doc[:dot] + ' for every axes in the grid' + doc[dot:]
doc = re.sub(
r'^(Returns\n-------\n)(.+)(\n\s+)(.+)',
r'\1SubplotGrid\2A grid of the resulting axes.',
doc
)
# Apply the method
_grid_command.__qualname__ = f'SubplotGrid.{name}'
_grid_command.__name__ = name
_grid_command.__doc__ = doc
setattr(cls, name, _grid_command)
def _validate_item(self, items, scalar=False):
"""
Validate assignments. Accept diverse iterable inputs.
"""
gridspec = None
message = (
'SubplotGrid can only be filled with proplot subplots '
'belonging to the same GridSpec. Instead got {}.'
)
items = np.atleast_1d(items)
if self:
gridspec = self.gridspec # compare against existing gridspec
for item in items.flat:
if not isinstance(item, paxes.Axes):
raise ValueError(message.format(f'the object {item!r}'))
item = item._get_topmost_axes()
if not isinstance(item, maxes.SubplotBase):
raise ValueError(message.format(f'the axes {item!r}'))
gs = item.get_subplotspec().get_topmost_subplotspec().get_gridspec()
if not isinstance(gs, GridSpec):
raise ValueError(message.format(f'the GridSpec {gs!r}'))
if gridspec and gs is not gridspec:
raise ValueError(message.format('at least two different GridSpecs'))
gridspec = gs
if not scalar:
items = tuple(items.flat)
elif items.size == 1:
items = items.flat[0]
else:
raise ValueError('Input must be a single proplot axes.')
return items
@property
def figure(self):
"""
The `proplot.figure.Figure` uniquely associated with this `SubplotGrid`.
This is used with the `SubplotGrid.format` command.
See also
--------
proplot.gridspec.GridSpec.figure
proplot.gridspec.SubplotGrid.gridspec
proplot.figure.Figure.subplotgrid
"""
return self.gridspec.figure
@property
def gridspec(self):
"""
The `~proplot.gridspec.GridSpec` uniquely associated with this `SubplotGrid`.
This is used to resolve 2D indexing. See `~SubplotGrid.__getitem__` for details.
See also
--------
proplot.figure.Figure.gridspec
proplot.gridspec.SubplotGrid.figure
proplot.gridspec.SubplotGrid.shape
"""
# Return the gridspec associatd with the grid
if not self:
raise ValueError('Unknown gridspec for empty SubplotGrid.')
ax = self[0]
ax = ax._get_topmost_axes()
return ax.get_subplotspec().get_topmost_subplotspec().get_gridspec()
@property
def shape(self):
"""
The shape of the `~proplot.gridspec.GridSpec` associated with the grid.
See `~SubplotGrid.__getitem__` for details.
See also
--------
proplot.gridspec.SubplotGrid.gridspec
"""
# NOTE: Considered deprecating this but on second thought since this is
# a 2D array-like object it should definitely have a shape attribute.
return self.gridspec.get_geometry()
# Dynamically add commands to generate twin or inset axes
# TODO: Add commands that plot the input data for every
# axes in the grid along a third dimension.
for _src, _name in (
(paxes.Axes, 'panel'),
(paxes.Axes, 'panel_axes'),
(paxes.Axes, 'inset'),
(paxes.Axes, 'inset_axes'),
(paxes.CartesianAxes, 'altx'),
(paxes.CartesianAxes, 'alty'),
(paxes.CartesianAxes, 'dualx'),
(paxes.CartesianAxes, 'dualy'),
(paxes.CartesianAxes, 'twinx'),
(paxes.CartesianAxes, 'twiny'),
):
SubplotGrid._add_command(_src, _name)
# Deprecated
SubplotsContainer = warnings._rename_objs('0.8.0', SubplotsContainer=SubplotGrid)