1603 lines
51 KiB
Python
1603 lines
51 KiB
Python
from collections import OrderedDict, namedtuple
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from functools import wraps
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import inspect
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import logging
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from numbers import Number
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import re
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import warnings
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import numpy as np
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import matplotlib
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from . import cbook, docstring, rcParams
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from .path import Path
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from .transforms import (Bbox, IdentityTransform, Transform, TransformedBbox,
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TransformedPatchPath, TransformedPath)
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_log = logging.getLogger(__name__)
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def allow_rasterization(draw):
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"""
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Decorator for Artist.draw method. Provides routines
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that run before and after the draw call. The before and after functions
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are useful for changing artist-dependent renderer attributes or making
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other setup function calls, such as starting and flushing a mixed-mode
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renderer.
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"""
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# the axes class has a second argument inframe for its draw method.
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@wraps(draw)
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def draw_wrapper(artist, renderer, *args, **kwargs):
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try:
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if artist.get_rasterized():
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renderer.start_rasterizing()
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if artist.get_agg_filter() is not None:
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renderer.start_filter()
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return draw(artist, renderer, *args, **kwargs)
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finally:
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if artist.get_agg_filter() is not None:
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renderer.stop_filter(artist.get_agg_filter())
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if artist.get_rasterized():
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renderer.stop_rasterizing()
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draw_wrapper._supports_rasterization = True
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return draw_wrapper
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def _stale_axes_callback(self, val):
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if self.axes:
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self.axes.stale = val
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_XYPair = namedtuple("_XYPair", "x y")
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class Artist(object):
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"""
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Abstract base class for objects that render into a FigureCanvas.
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Typically, all visible elements in a figure are subclasses of Artist.
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"""
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@cbook.deprecated("3.1")
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@property
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def aname(self):
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return 'Artist'
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zorder = 0
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# order of precedence when bulk setting/updating properties
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# via update. The keys should be property names and the values
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# integers
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_prop_order = dict(color=-1)
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def __init__(self):
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self._stale = True
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self.stale_callback = None
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self._axes = None
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self.figure = None
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self._transform = None
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self._transformSet = False
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self._visible = True
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self._animated = False
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self._alpha = None
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self.clipbox = None
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self._clippath = None
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self._clipon = True
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self._label = ''
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self._picker = None
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self._contains = None
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self._rasterized = None
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self._agg_filter = None
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self._mouseover = False
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self.eventson = False # fire events only if eventson
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self._oid = 0 # an observer id
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self._propobservers = {} # a dict from oids to funcs
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try:
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self.axes = None
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except AttributeError:
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# Handle self.axes as a read-only property, as in Figure.
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pass
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self._remove_method = None
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self._url = None
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self._gid = None
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self._snap = None
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self._sketch = rcParams['path.sketch']
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self._path_effects = rcParams['path.effects']
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self._sticky_edges = _XYPair([], [])
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self._in_layout = True
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def __getstate__(self):
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d = self.__dict__.copy()
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# remove the unpicklable remove method, this will get re-added on load
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# (by the axes) if the artist lives on an axes.
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d['stale_callback'] = None
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return d
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def remove(self):
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"""
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Remove the artist from the figure if possible.
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The effect will not be visible until the figure is redrawn, e.g.,
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with `.FigureCanvasBase.draw_idle`. Call `~.axes.Axes.relim` to
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update the axes limits if desired.
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Note: `~.axes.Axes.relim` will not see collections even if the
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collection was added to the axes with *autolim* = True.
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Note: there is no support for removing the artist's legend entry.
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"""
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# There is no method to set the callback. Instead the parent should
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# set the _remove_method attribute directly. This would be a
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# protected attribute if Python supported that sort of thing. The
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# callback has one parameter, which is the child to be removed.
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if self._remove_method is not None:
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self._remove_method(self)
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# clear stale callback
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self.stale_callback = None
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_ax_flag = False
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if hasattr(self, 'axes') and self.axes:
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# remove from the mouse hit list
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self.axes._mouseover_set.discard(self)
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# mark the axes as stale
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self.axes.stale = True
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# decouple the artist from the axes
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self.axes = None
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_ax_flag = True
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if self.figure:
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self.figure = None
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if not _ax_flag:
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self.figure = True
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else:
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raise NotImplementedError('cannot remove artist')
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# TODO: the fix for the collections relim problem is to move the
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# limits calculation into the artist itself, including the property of
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# whether or not the artist should affect the limits. Then there will
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# be no distinction between axes.add_line, axes.add_patch, etc.
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# TODO: add legend support
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def have_units(self):
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"""Return *True* if units are set on the *x* or *y* axes."""
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ax = self.axes
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if ax is None or ax.xaxis is None:
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return False
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return ax.xaxis.have_units() or ax.yaxis.have_units()
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def convert_xunits(self, x):
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"""
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Convert *x* using the unit type of the xaxis.
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If the artist is not in contained in an Axes or if the xaxis does not
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have units, *x* itself is returned.
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"""
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ax = getattr(self, 'axes', None)
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if ax is None or ax.xaxis is None:
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return x
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return ax.xaxis.convert_units(x)
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def convert_yunits(self, y):
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"""
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Convert *y* using the unit type of the yaxis.
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If the artist is not in contained in an Axes or if the yaxis does not
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have units, *y* itself is returned.
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"""
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ax = getattr(self, 'axes', None)
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if ax is None or ax.yaxis is None:
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return y
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return ax.yaxis.convert_units(y)
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@property
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def axes(self):
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"""The `~.axes.Axes` instance the artist resides in, or *None*."""
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return self._axes
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@axes.setter
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def axes(self, new_axes):
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if (new_axes is not None and self._axes is not None
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and new_axes != self._axes):
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raise ValueError("Can not reset the axes. You are probably "
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"trying to re-use an artist in more than one "
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"Axes which is not supported")
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self._axes = new_axes
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if new_axes is not None and new_axes is not self:
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self.stale_callback = _stale_axes_callback
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return new_axes
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@property
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def stale(self):
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"""
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Whether the artist is 'stale' and needs to be re-drawn for the output
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to match the internal state of the artist.
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"""
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return self._stale
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@stale.setter
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def stale(self, val):
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self._stale = val
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# if the artist is animated it does not take normal part in the
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# draw stack and is not expected to be drawn as part of the normal
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# draw loop (when not saving) so do not propagate this change
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if self.get_animated():
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return
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if val and self.stale_callback is not None:
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self.stale_callback(self, val)
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def get_window_extent(self, renderer):
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"""
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Get the axes bounding box in display space.
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The bounding box' width and height are nonnegative.
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Subclasses should override for inclusion in the bounding box
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"tight" calculation. Default is to return an empty bounding
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box at 0, 0.
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Be careful when using this function, the results will not update
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if the artist window extent of the artist changes. The extent
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can change due to any changes in the transform stack, such as
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changing the axes limits, the figure size, or the canvas used
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(as is done when saving a figure). This can lead to unexpected
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behavior where interactive figures will look fine on the screen,
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but will save incorrectly.
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"""
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return Bbox([[0, 0], [0, 0]])
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def _get_clipping_extent_bbox(self):
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"""
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Return a bbox with the extents of the intersection of the clip_path
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and clip_box for this artist, or None if both of these are
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None, or ``get_clip_on`` is False.
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"""
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bbox = None
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if self.get_clip_on():
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clip_box = self.get_clip_box()
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if clip_box is not None:
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bbox = clip_box
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clip_path = self.get_clip_path()
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if clip_path is not None and bbox is not None:
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clip_path = clip_path.get_fully_transformed_path()
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bbox = Bbox.intersection(bbox, clip_path.get_extents())
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return bbox
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def get_tightbbox(self, renderer):
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"""
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Like `Artist.get_window_extent`, but includes any clipping.
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Parameters
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----------
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renderer : `.RendererBase` instance
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renderer that will be used to draw the figures (i.e.
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``fig.canvas.get_renderer()``)
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Returns
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-------
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bbox : `.BBox`
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The enclosing bounding box (in figure pixel co-ordinates).
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"""
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bbox = self.get_window_extent(renderer)
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if self.get_clip_on():
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clip_box = self.get_clip_box()
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if clip_box is not None:
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bbox = Bbox.intersection(bbox, clip_box)
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clip_path = self.get_clip_path()
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if clip_path is not None and bbox is not None:
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clip_path = clip_path.get_fully_transformed_path()
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bbox = Bbox.intersection(bbox, clip_path.get_extents())
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return bbox
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def add_callback(self, func):
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"""
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Add a callback function that will be called whenever one of the
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`.Artist`'s properties changes.
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Parameters
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----------
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func : callable
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The callback function. It must have the signature::
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def func(artist: Artist) -> Any
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where *artist* is the calling `.Artist`. Return values may exist
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but are ignored.
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Returns
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-------
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oid : int
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The observer id associated with the callback. This id can be
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used for removing the callback with `.remove_callback` later.
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See Also
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--------
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remove_callback
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"""
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oid = self._oid
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self._propobservers[oid] = func
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self._oid += 1
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return oid
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def remove_callback(self, oid):
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"""
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Remove a callback based on its observer id.
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See Also
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--------
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add_callback
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"""
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try:
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del self._propobservers[oid]
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except KeyError:
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pass
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def pchanged(self):
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"""
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Call all of the registered callbacks.
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This function is triggered internally when a property is changed.
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See Also
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--------
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add_callback
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remove_callback
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"""
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for oid, func in self._propobservers.items():
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func(self)
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def is_transform_set(self):
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"""
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Return whether the Artist has an explicitly set transform.
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This is *True* after `.set_transform` has been called.
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"""
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return self._transformSet
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def set_transform(self, t):
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"""
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Set the artist transform.
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Parameters
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----------
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t : `.Transform`
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"""
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self._transform = t
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self._transformSet = True
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self.pchanged()
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self.stale = True
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def get_transform(self):
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"""Return the `.Transform` instance used by this artist."""
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if self._transform is None:
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self._transform = IdentityTransform()
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elif (not isinstance(self._transform, Transform)
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and hasattr(self._transform, '_as_mpl_transform')):
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self._transform = self._transform._as_mpl_transform(self.axes)
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return self._transform
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def get_children(self):
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r"""Return a list of the child `.Artist`\s of this `.Artist`."""
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return []
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def contains(self, mouseevent):
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"""Test whether the artist contains the mouse event.
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Parameters
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----------
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mouseevent : `matplotlib.backend_bases.MouseEvent`
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Returns
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-------
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contains : bool
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Whether any values are within the radius.
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details : dict
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An artist-specific dictionary of details of the event context,
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such as which points are contained in the pick radius. See the
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individual Artist subclasses for details.
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See Also
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--------
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set_contains, get_contains
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"""
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if self._contains is not None:
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return self._contains(self, mouseevent)
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_log.warning("%r needs 'contains' method", self.__class__.__name__)
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return False, {}
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def set_contains(self, picker):
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"""
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Define a custom contains test for the artist.
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The provided callable replaces the default `.contains` method
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of the artist.
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Parameters
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----------
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picker : callable
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A custom picker function to evaluate if an event is within the
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artist. The function must have the signature::
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def contains(artist: Artist, event: MouseEvent) -> bool, dict
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that returns:
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- a bool indicating if the event is within the artist
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- a dict of additional information. The dict should at least
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return the same information as the default ``contains()``
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implementation of the respective artist, but may provide
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additional information.
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"""
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if not callable(picker):
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raise TypeError("picker is not a callable")
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self._contains = picker
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def get_contains(self):
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"""
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Return the custom contains function of the artist if set, or *None*.
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See Also
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--------
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set_contains
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"""
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return self._contains
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def pickable(self):
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"""
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Return whether the artist is pickable.
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See Also
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--------
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set_picker, get_picker, pick
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"""
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return self.figure is not None and self._picker is not None
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def pick(self, mouseevent):
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"""
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Process a pick event.
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Each child artist will fire a pick event if *mouseevent* is over
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the artist and the artist has picker set.
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See Also
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--------
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set_picker, get_picker, pickable
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"""
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# Pick self
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if self.pickable():
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picker = self.get_picker()
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if callable(picker):
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inside, prop = picker(self, mouseevent)
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else:
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inside, prop = self.contains(mouseevent)
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if inside:
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self.figure.canvas.pick_event(mouseevent, self, **prop)
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# Pick children
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for a in self.get_children():
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# make sure the event happened in the same axes
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ax = getattr(a, 'axes', None)
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if (mouseevent.inaxes is None or ax is None
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or mouseevent.inaxes == ax):
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# we need to check if mouseevent.inaxes is None
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# because some objects associated with an axes (e.g., a
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# tick label) can be outside the bounding box of the
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# axes and inaxes will be None
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# also check that ax is None so that it traverse objects
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# which do no have an axes property but children might
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a.pick(mouseevent)
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def set_picker(self, picker):
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"""
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Define the picking behavior of the artist.
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Parameters
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----------
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picker : None or bool or float or callable
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This can be one of the following:
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- *None*: Picking is disabled for this artist (default).
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- A boolean: If *True* then picking will be enabled and the
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artist will fire a pick event if the mouse event is over
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the artist.
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- A float: If picker is a number it is interpreted as an
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epsilon tolerance in points and the artist will fire
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off an event if it's data is within epsilon of the mouse
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event. For some artists like lines and patch collections,
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the artist may provide additional data to the pick event
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that is generated, e.g., the indices of the data within
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epsilon of the pick event
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- A function: If picker is callable, it is a user supplied
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function which determines whether the artist is hit by the
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mouse event::
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hit, props = picker(artist, mouseevent)
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to determine the hit test. if the mouse event is over the
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artist, return *hit=True* and props is a dictionary of
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properties you want added to the PickEvent attributes.
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"""
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self._picker = picker
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def get_picker(self):
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"""
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Return the picking behavior of the artist.
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The possible values are described in `.set_picker`.
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See Also
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--------
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set_picker, pickable, pick
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"""
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return self._picker
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def get_url(self):
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"""Return the url."""
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return self._url
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def set_url(self, url):
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"""
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Set the url for the artist.
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Parameters
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----------
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url : str
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"""
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self._url = url
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|
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def get_gid(self):
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"""Return the group id."""
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return self._gid
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def set_gid(self, gid):
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"""
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Set the (group) id for the artist.
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Parameters
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----------
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gid : str
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"""
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self._gid = gid
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|
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def get_snap(self):
|
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"""
|
|
Returns the snap setting.
|
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|
|
See `.set_snap` for details.
|
|
"""
|
|
if rcParams['path.snap']:
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return self._snap
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else:
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return False
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|
|
def set_snap(self, snap):
|
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"""
|
|
Set the snapping behavior.
|
|
|
|
Snapping aligns positions with the pixel grid, which results in
|
|
clearer images. For example, if a black line of 1px width was
|
|
defined at a position in between two pixels, the resulting image
|
|
would contain the interpolated value of that line in the pixel grid,
|
|
which would be a grey value on both adjacent pixel positions. In
|
|
contrast, snapping will move the line to the nearest integer pixel
|
|
value, so that the resulting image will really contain a 1px wide
|
|
black line.
|
|
|
|
Snapping is currently only supported by the Agg and MacOSX backends.
|
|
|
|
Parameters
|
|
----------
|
|
snap : bool or None
|
|
Possible values:
|
|
|
|
- *True*: Snap vertices to the nearest pixel center.
|
|
- *False*: Do not modify vertex positions.
|
|
- *None*: (auto) If the path contains only rectilinear line
|
|
segments, round to the nearest pixel center.
|
|
"""
|
|
self._snap = snap
|
|
self.stale = True
|
|
|
|
def get_sketch_params(self):
|
|
"""
|
|
Returns the sketch parameters for the artist.
|
|
|
|
Returns
|
|
-------
|
|
sketch_params : tuple or None
|
|
|
|
A 3-tuple with the following elements:
|
|
|
|
- *scale*: The amplitude of the wiggle perpendicular to the
|
|
source line.
|
|
- *length*: The length of the wiggle along the line.
|
|
- *randomness*: The scale factor by which the length is
|
|
shrunken or expanded.
|
|
|
|
Returns *None* if no sketch parameters were set.
|
|
"""
|
|
return self._sketch
|
|
|
|
def set_sketch_params(self, scale=None, length=None, randomness=None):
|
|
"""
|
|
Sets the sketch parameters.
|
|
|
|
Parameters
|
|
----------
|
|
|
|
scale : float, optional
|
|
The amplitude of the wiggle perpendicular to the source
|
|
line, in pixels. If scale is `None`, or not provided, no
|
|
sketch filter will be provided.
|
|
|
|
length : float, optional
|
|
The length of the wiggle along the line, in pixels
|
|
(default 128.0)
|
|
|
|
randomness : float, optional
|
|
The scale factor by which the length is shrunken or
|
|
expanded (default 16.0)
|
|
|
|
.. ACCEPTS: (scale: float, length: float, randomness: float)
|
|
"""
|
|
if scale is None:
|
|
self._sketch = None
|
|
else:
|
|
self._sketch = (scale, length or 128.0, randomness or 16.0)
|
|
self.stale = True
|
|
|
|
def set_path_effects(self, path_effects):
|
|
"""Set the path effects.
|
|
|
|
Parameters
|
|
----------
|
|
path_effects : `.AbstractPathEffect`
|
|
"""
|
|
self._path_effects = path_effects
|
|
self.stale = True
|
|
|
|
def get_path_effects(self):
|
|
return self._path_effects
|
|
|
|
def get_figure(self):
|
|
"""Return the `.Figure` instance the artist belongs to."""
|
|
return self.figure
|
|
|
|
def set_figure(self, fig):
|
|
"""
|
|
Set the `.Figure` instance the artist belongs to.
|
|
|
|
Parameters
|
|
----------
|
|
fig : `.Figure`
|
|
"""
|
|
# if this is a no-op just return
|
|
if self.figure is fig:
|
|
return
|
|
# if we currently have a figure (the case of both `self.figure`
|
|
# and `fig` being none is taken care of above) we then user is
|
|
# trying to change the figure an artist is associated with which
|
|
# is not allowed for the same reason as adding the same instance
|
|
# to more than one Axes
|
|
if self.figure is not None:
|
|
raise RuntimeError("Can not put single artist in "
|
|
"more than one figure")
|
|
self.figure = fig
|
|
if self.figure and self.figure is not self:
|
|
self.pchanged()
|
|
self.stale = True
|
|
|
|
def set_clip_box(self, clipbox):
|
|
"""
|
|
Set the artist's clip `.Bbox`.
|
|
|
|
Parameters
|
|
----------
|
|
clipbox : `.Bbox`
|
|
"""
|
|
self.clipbox = clipbox
|
|
self.pchanged()
|
|
self.stale = True
|
|
|
|
def set_clip_path(self, path, transform=None):
|
|
"""
|
|
Set the artist's clip path, which may be:
|
|
|
|
- a :class:`~matplotlib.patches.Patch` (or subclass) instance; or
|
|
- a :class:`~matplotlib.path.Path` instance, in which case a
|
|
:class:`~matplotlib.transforms.Transform` instance, which will be
|
|
applied to the path before using it for clipping, must be provided;
|
|
or
|
|
- ``None``, to remove a previously set clipping path.
|
|
|
|
For efficiency, if the path happens to be an axis-aligned rectangle,
|
|
this method will set the clipping box to the corresponding rectangle
|
|
and set the clipping path to ``None``.
|
|
|
|
ACCEPTS: [(`~matplotlib.path.Path`, `.Transform`) | `.Patch` | None]
|
|
"""
|
|
from matplotlib.patches import Patch, Rectangle
|
|
|
|
success = False
|
|
if transform is None:
|
|
if isinstance(path, Rectangle):
|
|
self.clipbox = TransformedBbox(Bbox.unit(),
|
|
path.get_transform())
|
|
self._clippath = None
|
|
success = True
|
|
elif isinstance(path, Patch):
|
|
self._clippath = TransformedPatchPath(path)
|
|
success = True
|
|
elif isinstance(path, tuple):
|
|
path, transform = path
|
|
|
|
if path is None:
|
|
self._clippath = None
|
|
success = True
|
|
elif isinstance(path, Path):
|
|
self._clippath = TransformedPath(path, transform)
|
|
success = True
|
|
elif isinstance(path, TransformedPatchPath):
|
|
self._clippath = path
|
|
success = True
|
|
elif isinstance(path, TransformedPath):
|
|
self._clippath = path
|
|
success = True
|
|
|
|
if not success:
|
|
raise TypeError(
|
|
"Invalid arguments to set_clip_path, of type {} and {}"
|
|
.format(type(path).__name__, type(transform).__name__))
|
|
# This may result in the callbacks being hit twice, but guarantees they
|
|
# will be hit at least once.
|
|
self.pchanged()
|
|
self.stale = True
|
|
|
|
def get_alpha(self):
|
|
"""
|
|
Return the alpha value used for blending - not supported on all
|
|
backends
|
|
"""
|
|
return self._alpha
|
|
|
|
def get_visible(self):
|
|
"""Return the visibility."""
|
|
return self._visible
|
|
|
|
def get_animated(self):
|
|
"""Return the animated state."""
|
|
return self._animated
|
|
|
|
def get_in_layout(self):
|
|
"""
|
|
Return boolean flag, ``True`` if artist is included in layout
|
|
calculations.
|
|
|
|
E.g. :doc:`/tutorials/intermediate/constrainedlayout_guide`,
|
|
`.Figure.tight_layout()`, and
|
|
``fig.savefig(fname, bbox_inches='tight')``.
|
|
"""
|
|
return self._in_layout
|
|
|
|
def get_clip_on(self):
|
|
"""Return whether the artist uses clipping."""
|
|
return self._clipon
|
|
|
|
def get_clip_box(self):
|
|
"""Return the clipbox."""
|
|
return self.clipbox
|
|
|
|
def get_clip_path(self):
|
|
"""Return the clip path."""
|
|
return self._clippath
|
|
|
|
def get_transformed_clip_path_and_affine(self):
|
|
'''
|
|
Return the clip path with the non-affine part of its
|
|
transformation applied, and the remaining affine part of its
|
|
transformation.
|
|
'''
|
|
if self._clippath is not None:
|
|
return self._clippath.get_transformed_path_and_affine()
|
|
return None, None
|
|
|
|
def set_clip_on(self, b):
|
|
"""
|
|
Set whether the artist uses clipping.
|
|
|
|
When False artists will be visible out side of the axes which
|
|
can lead to unexpected results.
|
|
|
|
Parameters
|
|
----------
|
|
b : bool
|
|
"""
|
|
self._clipon = b
|
|
# This may result in the callbacks being hit twice, but ensures they
|
|
# are hit at least once
|
|
self.pchanged()
|
|
self.stale = True
|
|
|
|
def _set_gc_clip(self, gc):
|
|
'Set the clip properly for the gc'
|
|
if self._clipon:
|
|
if self.clipbox is not None:
|
|
gc.set_clip_rectangle(self.clipbox)
|
|
gc.set_clip_path(self._clippath)
|
|
else:
|
|
gc.set_clip_rectangle(None)
|
|
gc.set_clip_path(None)
|
|
|
|
def get_rasterized(self):
|
|
"""Return whether the artist is to be rasterized."""
|
|
return self._rasterized
|
|
|
|
def set_rasterized(self, rasterized):
|
|
"""
|
|
Force rasterized (bitmap) drawing in vector backend output.
|
|
|
|
Defaults to None, which implies the backend's default behavior.
|
|
|
|
Parameters
|
|
----------
|
|
rasterized : bool or None
|
|
"""
|
|
if rasterized and not hasattr(self.draw, "_supports_rasterization"):
|
|
cbook._warn_external(
|
|
"Rasterization of '%s' will be ignored" % self)
|
|
|
|
self._rasterized = rasterized
|
|
|
|
def get_agg_filter(self):
|
|
"""Return filter function to be used for agg filter."""
|
|
return self._agg_filter
|
|
|
|
def set_agg_filter(self, filter_func):
|
|
"""Set the agg filter.
|
|
|
|
Parameters
|
|
----------
|
|
filter_func : callable
|
|
A filter function, which takes a (m, n, 3) float array and a dpi
|
|
value, and returns a (m, n, 3) array.
|
|
|
|
.. ACCEPTS: a filter function, which takes a (m, n, 3) float array
|
|
and a dpi value, and returns a (m, n, 3) array
|
|
"""
|
|
self._agg_filter = filter_func
|
|
self.stale = True
|
|
|
|
def draw(self, renderer, *args, **kwargs):
|
|
"""
|
|
Draw the Artist using the given renderer.
|
|
|
|
This method will be overridden in the Artist subclasses. Typically,
|
|
it is implemented to not have any effect if the Artist is not visible
|
|
(`.Artist.get_visible` is *False*).
|
|
|
|
Parameters
|
|
----------
|
|
renderer : `.RendererBase` subclass.
|
|
"""
|
|
if not self.get_visible():
|
|
return
|
|
self.stale = False
|
|
|
|
def set_alpha(self, alpha):
|
|
"""
|
|
Set the alpha value used for blending - not supported on all backends.
|
|
|
|
Parameters
|
|
----------
|
|
alpha : float
|
|
"""
|
|
self._alpha = alpha
|
|
self.pchanged()
|
|
self.stale = True
|
|
|
|
def set_visible(self, b):
|
|
"""
|
|
Set the artist's visibility.
|
|
|
|
Parameters
|
|
----------
|
|
b : bool
|
|
"""
|
|
self._visible = b
|
|
self.pchanged()
|
|
self.stale = True
|
|
|
|
def set_animated(self, b):
|
|
"""
|
|
Set the artist's animation state.
|
|
|
|
Parameters
|
|
----------
|
|
b : bool
|
|
"""
|
|
if self._animated != b:
|
|
self._animated = b
|
|
self.pchanged()
|
|
|
|
def set_in_layout(self, in_layout):
|
|
"""
|
|
Set if artist is to be included in layout calculations,
|
|
E.g. :doc:`/tutorials/intermediate/constrainedlayout_guide`,
|
|
`.Figure.tight_layout()`, and
|
|
``fig.savefig(fname, bbox_inches='tight')``.
|
|
|
|
Parameters
|
|
----------
|
|
in_layout : bool
|
|
"""
|
|
self._in_layout = in_layout
|
|
|
|
def update(self, props):
|
|
"""
|
|
Update this artist's properties from the dictionary *props*.
|
|
"""
|
|
def _update_property(self, k, v):
|
|
"""Sorting out how to update property (setter or setattr).
|
|
|
|
Parameters
|
|
----------
|
|
k : str
|
|
The name of property to update
|
|
v : obj
|
|
The value to assign to the property
|
|
|
|
Returns
|
|
-------
|
|
ret : obj or None
|
|
If using a `set_*` method return it's return, else None.
|
|
"""
|
|
k = k.lower()
|
|
# white list attributes we want to be able to update through
|
|
# art.update, art.set, setp
|
|
if k in {'axes'}:
|
|
return setattr(self, k, v)
|
|
else:
|
|
func = getattr(self, 'set_' + k, None)
|
|
if not callable(func):
|
|
raise AttributeError('{!r} object has no property {!r}'
|
|
.format(type(self).__name__, k))
|
|
return func(v)
|
|
|
|
with cbook._setattr_cm(self, eventson=False):
|
|
ret = [_update_property(self, k, v) for k, v in props.items()]
|
|
|
|
if len(ret):
|
|
self.pchanged()
|
|
self.stale = True
|
|
return ret
|
|
|
|
def get_label(self):
|
|
"""Return the label used for this artist in the legend."""
|
|
return self._label
|
|
|
|
def set_label(self, s):
|
|
"""
|
|
Set a label that will be displayed in the legend.
|
|
|
|
Parameters
|
|
----------
|
|
s : object
|
|
*s* will be converted to a string by calling `str`.
|
|
"""
|
|
if s is not None:
|
|
self._label = str(s)
|
|
else:
|
|
self._label = None
|
|
self.pchanged()
|
|
self.stale = True
|
|
|
|
def get_zorder(self):
|
|
"""Return the artist's zorder."""
|
|
return self.zorder
|
|
|
|
def set_zorder(self, level):
|
|
"""
|
|
Set the zorder for the artist. Artists with lower zorder
|
|
values are drawn first.
|
|
|
|
Parameters
|
|
----------
|
|
level : float
|
|
"""
|
|
if level is None:
|
|
level = self.__class__.zorder
|
|
self.zorder = level
|
|
self.pchanged()
|
|
self.stale = True
|
|
|
|
@property
|
|
def sticky_edges(self):
|
|
"""
|
|
``x`` and ``y`` sticky edge lists for autoscaling.
|
|
|
|
When performing autoscaling, if a data limit coincides with a value in
|
|
the corresponding sticky_edges list, then no margin will be added--the
|
|
view limit "sticks" to the edge. A typical use case is histograms,
|
|
where one usually expects no margin on the bottom edge (0) of the
|
|
histogram.
|
|
|
|
This attribute cannot be assigned to; however, the ``x`` and ``y``
|
|
lists can be modified in place as needed.
|
|
|
|
Examples
|
|
--------
|
|
|
|
>>> artist.sticky_edges.x[:] = (xmin, xmax)
|
|
>>> artist.sticky_edges.y[:] = (ymin, ymax)
|
|
|
|
"""
|
|
return self._sticky_edges
|
|
|
|
def update_from(self, other):
|
|
'Copy properties from *other* to *self*.'
|
|
self._transform = other._transform
|
|
self._transformSet = other._transformSet
|
|
self._visible = other._visible
|
|
self._alpha = other._alpha
|
|
self.clipbox = other.clipbox
|
|
self._clipon = other._clipon
|
|
self._clippath = other._clippath
|
|
self._label = other._label
|
|
self._sketch = other._sketch
|
|
self._path_effects = other._path_effects
|
|
self.sticky_edges.x[:] = other.sticky_edges.x[:]
|
|
self.sticky_edges.y[:] = other.sticky_edges.y[:]
|
|
self.pchanged()
|
|
self.stale = True
|
|
|
|
def properties(self):
|
|
"""Return a dictionary of all the properties of the artist."""
|
|
return ArtistInspector(self).properties()
|
|
|
|
def set(self, **kwargs):
|
|
"""A property batch setter. Pass *kwargs* to set properties."""
|
|
kwargs = cbook.normalize_kwargs(
|
|
kwargs, getattr(type(self), "_alias_map", {}))
|
|
props = OrderedDict(
|
|
sorted(kwargs.items(), reverse=True,
|
|
key=lambda x: (self._prop_order.get(x[0], 0), x[0])))
|
|
return self.update(props)
|
|
|
|
def findobj(self, match=None, include_self=True):
|
|
"""
|
|
Find artist objects.
|
|
|
|
Recursively find all `.Artist` instances contained in the artist.
|
|
|
|
Parameters
|
|
----------
|
|
match
|
|
A filter criterion for the matches. This can be
|
|
|
|
- *None*: Return all objects contained in artist.
|
|
- A function with signature ``def match(artist: Artist) -> bool``.
|
|
The result will only contain artists for which the function
|
|
returns *True*.
|
|
- A class instance: e.g., `.Line2D`. The result will only contain
|
|
artists of this class or its subclasses (``isinstance`` check).
|
|
|
|
include_self : bool
|
|
Include *self* in the list to be checked for a match.
|
|
|
|
Returns
|
|
-------
|
|
artists : list of `.Artist`
|
|
|
|
"""
|
|
if match is None: # always return True
|
|
def matchfunc(x):
|
|
return True
|
|
elif isinstance(match, type) and issubclass(match, Artist):
|
|
def matchfunc(x):
|
|
return isinstance(x, match)
|
|
elif callable(match):
|
|
matchfunc = match
|
|
else:
|
|
raise ValueError('match must be None, a matplotlib.artist.Artist '
|
|
'subclass, or a callable')
|
|
|
|
artists = sum([c.findobj(matchfunc) for c in self.get_children()], [])
|
|
if include_self and matchfunc(self):
|
|
artists.append(self)
|
|
return artists
|
|
|
|
def get_cursor_data(self, event):
|
|
"""
|
|
Return the cursor data for a given event.
|
|
|
|
.. note::
|
|
This method is intended to be overridden by artist subclasses.
|
|
As an end-user of Matplotlib you will most likely not call this
|
|
method yourself.
|
|
|
|
Cursor data can be used by Artists to provide additional context
|
|
information for a given event. The default implementation just returns
|
|
*None*.
|
|
|
|
Subclasses can override the method and return arbitrary data. However,
|
|
when doing so, they must ensure that `.format_cursor_data` can convert
|
|
the data to a string representation.
|
|
|
|
The only current use case is displaying the z-value of an `.AxesImage`
|
|
in the status bar of a plot window, while moving the mouse.
|
|
|
|
Parameters
|
|
----------
|
|
event : `matplotlib.backend_bases.MouseEvent`
|
|
|
|
See Also
|
|
--------
|
|
format_cursor_data
|
|
|
|
"""
|
|
return None
|
|
|
|
def format_cursor_data(self, data):
|
|
"""
|
|
Return a string representation of *data*.
|
|
|
|
.. note::
|
|
This method is intended to be overridden by artist subclasses.
|
|
As an end-user of Matplotlib you will most likely not call this
|
|
method yourself.
|
|
|
|
The default implementation converts ints and floats and arrays of ints
|
|
and floats into a comma-separated string enclosed in square brackets.
|
|
|
|
See Also
|
|
--------
|
|
get_cursor_data
|
|
"""
|
|
try:
|
|
data[0]
|
|
except (TypeError, IndexError):
|
|
data = [data]
|
|
data_str = ', '.join('{:0.3g}'.format(item) for item in data
|
|
if isinstance(item, Number))
|
|
return "[" + data_str + "]"
|
|
|
|
@property
|
|
def mouseover(self):
|
|
return self._mouseover
|
|
|
|
@mouseover.setter
|
|
def mouseover(self, val):
|
|
val = bool(val)
|
|
self._mouseover = val
|
|
ax = self.axes
|
|
if ax:
|
|
if val:
|
|
ax._mouseover_set.add(self)
|
|
else:
|
|
ax._mouseover_set.discard(self)
|
|
|
|
|
|
class ArtistInspector(object):
|
|
"""
|
|
A helper class to inspect an `~matplotlib.artist.Artist` and return
|
|
information about its settable properties and their current values.
|
|
"""
|
|
|
|
def __init__(self, o):
|
|
r"""
|
|
Initialize the artist inspector with an `Artist` or an iterable of
|
|
`Artist`\s. If an iterable is used, we assume it is a homogeneous
|
|
sequence (all `Artists` are of the same type) and it is your
|
|
responsibility to make sure this is so.
|
|
"""
|
|
if not isinstance(o, Artist):
|
|
if np.iterable(o):
|
|
o = list(o)
|
|
if len(o):
|
|
o = o[0]
|
|
|
|
self.oorig = o
|
|
if not isinstance(o, type):
|
|
o = type(o)
|
|
self.o = o
|
|
|
|
self.aliasd = self.get_aliases()
|
|
|
|
def get_aliases(self):
|
|
"""
|
|
Get a dict mapping property fullnames to sets of aliases for each alias
|
|
in the :class:`~matplotlib.artist.ArtistInspector`.
|
|
|
|
e.g., for lines::
|
|
|
|
{'markerfacecolor': {'mfc'},
|
|
'linewidth' : {'lw'},
|
|
}
|
|
"""
|
|
names = [name for name in dir(self.o)
|
|
if name.startswith(('set_', 'get_'))
|
|
and callable(getattr(self.o, name))]
|
|
aliases = {}
|
|
for name in names:
|
|
func = getattr(self.o, name)
|
|
if not self.is_alias(func):
|
|
continue
|
|
propname = re.search("`({}.*)`".format(name[:4]), # get_.*/set_.*
|
|
inspect.getdoc(func)).group(1)
|
|
aliases.setdefault(propname[4:], set()).add(name[4:])
|
|
return aliases
|
|
|
|
_get_valid_values_regex = re.compile(
|
|
r"\n\s*(?:\.\.\s+)?ACCEPTS:\s*((?:.|\n)*?)(?:$|(?:\n\n))"
|
|
)
|
|
|
|
def get_valid_values(self, attr):
|
|
"""
|
|
Get the legal arguments for the setter associated with *attr*.
|
|
|
|
This is done by querying the docstring of the setter for a line that
|
|
begins with "ACCEPTS:" or ".. ACCEPTS:", and then by looking for a
|
|
numpydoc-style documentation for the setter's first argument.
|
|
"""
|
|
|
|
name = 'set_%s' % attr
|
|
if not hasattr(self.o, name):
|
|
raise AttributeError('%s has no function %s' % (self.o, name))
|
|
func = getattr(self.o, name)
|
|
|
|
docstring = inspect.getdoc(func)
|
|
if docstring is None:
|
|
return 'unknown'
|
|
|
|
if docstring.startswith('Alias for '):
|
|
return None
|
|
|
|
match = self._get_valid_values_regex.search(docstring)
|
|
if match is not None:
|
|
return re.sub("\n *", " ", match.group(1))
|
|
|
|
# Much faster than list(inspect.signature(func).parameters)[1],
|
|
# although barely relevant wrt. matplotlib's total import time.
|
|
param_name = func.__code__.co_varnames[1]
|
|
# We could set the presence * based on whether the parameter is a
|
|
# varargs (it can't be a varkwargs) but it's not really worth the it.
|
|
match = re.search(r"(?m)^ *\*?{} : (.+)".format(param_name), docstring)
|
|
if match:
|
|
return match.group(1)
|
|
|
|
return 'unknown'
|
|
|
|
def _get_setters_and_targets(self):
|
|
"""
|
|
Get the attribute strings and a full path to where the setter
|
|
is defined for all setters in an object.
|
|
"""
|
|
setters = []
|
|
for name in dir(self.o):
|
|
if not name.startswith('set_'):
|
|
continue
|
|
func = getattr(self.o, name)
|
|
if not callable(func):
|
|
continue
|
|
nargs = len(inspect.getfullargspec(func).args)
|
|
if nargs < 2 or self.is_alias(func):
|
|
continue
|
|
source_class = self.o.__module__ + "." + self.o.__name__
|
|
for cls in self.o.mro():
|
|
if name in cls.__dict__:
|
|
source_class = cls.__module__ + "." + cls.__name__
|
|
break
|
|
source_class = self._replace_path(source_class)
|
|
setters.append((name[4:], source_class + "." + name))
|
|
return setters
|
|
|
|
def _replace_path(self, source_class):
|
|
"""
|
|
Changes the full path to the public API path that is used
|
|
in sphinx. This is needed for links to work.
|
|
"""
|
|
replace_dict = {'_base._AxesBase': 'Axes',
|
|
'_axes.Axes': 'Axes'}
|
|
for key, value in replace_dict.items():
|
|
source_class = source_class.replace(key, value)
|
|
return source_class
|
|
|
|
def get_setters(self):
|
|
"""
|
|
Get the attribute strings with setters for object. e.g., for a line,
|
|
return ``['markerfacecolor', 'linewidth', ....]``.
|
|
"""
|
|
return [prop for prop, target in self._get_setters_and_targets()]
|
|
|
|
def is_alias(self, o):
|
|
"""Return whether method object *o* is an alias for another method."""
|
|
ds = inspect.getdoc(o)
|
|
if ds is None:
|
|
return False
|
|
return ds.startswith('Alias for ')
|
|
|
|
def aliased_name(self, s):
|
|
"""
|
|
Return 'PROPNAME or alias' if *s* has an alias, else return 'PROPNAME'.
|
|
|
|
e.g., for the line markerfacecolor property, which has an
|
|
alias, return 'markerfacecolor or mfc' and for the transform
|
|
property, which does not, return 'transform'.
|
|
"""
|
|
aliases = ''.join(' or %s' % x for x in sorted(self.aliasd.get(s, [])))
|
|
return s + aliases
|
|
|
|
def aliased_name_rest(self, s, target):
|
|
"""
|
|
Return 'PROPNAME or alias' if *s* has an alias, else return 'PROPNAME',
|
|
formatted for ReST.
|
|
|
|
e.g., for the line markerfacecolor property, which has an
|
|
alias, return 'markerfacecolor or mfc' and for the transform
|
|
property, which does not, return 'transform'.
|
|
"""
|
|
aliases = ''.join(' or %s' % x for x in sorted(self.aliasd.get(s, [])))
|
|
return ':meth:`%s <%s>`%s' % (s, target, aliases)
|
|
|
|
def pprint_setters(self, prop=None, leadingspace=2):
|
|
"""
|
|
If *prop* is *None*, return a list of strings of all settable
|
|
properties and their valid values.
|
|
|
|
If *prop* is not *None*, it is a valid property name and that
|
|
property will be returned as a string of property : valid
|
|
values.
|
|
"""
|
|
if leadingspace:
|
|
pad = ' ' * leadingspace
|
|
else:
|
|
pad = ''
|
|
if prop is not None:
|
|
accepts = self.get_valid_values(prop)
|
|
return '%s%s: %s' % (pad, prop, accepts)
|
|
|
|
attrs = self._get_setters_and_targets()
|
|
attrs.sort()
|
|
lines = []
|
|
|
|
for prop, path in attrs:
|
|
accepts = self.get_valid_values(prop)
|
|
name = self.aliased_name(prop)
|
|
|
|
lines.append('%s%s: %s' % (pad, name, accepts))
|
|
return lines
|
|
|
|
def pprint_setters_rest(self, prop=None, leadingspace=4):
|
|
"""
|
|
If *prop* is *None*, return a list of strings of all settable
|
|
properties and their valid values. Format the output for ReST
|
|
|
|
If *prop* is not *None*, it is a valid property name and that
|
|
property will be returned as a string of property : valid
|
|
values.
|
|
"""
|
|
if leadingspace:
|
|
pad = ' ' * leadingspace
|
|
else:
|
|
pad = ''
|
|
if prop is not None:
|
|
accepts = self.get_valid_values(prop)
|
|
return '%s%s: %s' % (pad, prop, accepts)
|
|
|
|
attrs = sorted(self._get_setters_and_targets())
|
|
|
|
names = [self.aliased_name_rest(prop, target)
|
|
for prop, target in attrs]
|
|
accepts = [self.get_valid_values(prop) for prop, target in attrs]
|
|
|
|
col0_len = max(len(n) for n in names)
|
|
col1_len = max(len(a) for a in accepts)
|
|
table_formatstr = pad + ' ' + '=' * col0_len + ' ' + '=' * col1_len
|
|
|
|
return [
|
|
'',
|
|
pad + '.. table::',
|
|
pad + ' :class: property-table',
|
|
'',
|
|
table_formatstr,
|
|
pad + ' ' + 'Property'.ljust(col0_len)
|
|
+ ' ' + 'Description'.ljust(col1_len),
|
|
table_formatstr,
|
|
*[pad + ' ' + n.ljust(col0_len) + ' ' + a.ljust(col1_len)
|
|
for n, a in zip(names, accepts)],
|
|
table_formatstr,
|
|
'',
|
|
]
|
|
|
|
def properties(self):
|
|
"""Return a dictionary mapping property name -> value."""
|
|
o = self.oorig
|
|
getters = [name for name in dir(o)
|
|
if name.startswith('get_') and callable(getattr(o, name))]
|
|
getters.sort()
|
|
d = {}
|
|
for name in getters:
|
|
func = getattr(o, name)
|
|
if self.is_alias(func):
|
|
continue
|
|
try:
|
|
with warnings.catch_warnings():
|
|
warnings.simplefilter('ignore')
|
|
val = func()
|
|
except Exception:
|
|
continue
|
|
else:
|
|
d[name[4:]] = val
|
|
return d
|
|
|
|
def pprint_getters(self):
|
|
"""Return the getters and actual values as list of strings."""
|
|
lines = []
|
|
for name, val in sorted(self.properties().items()):
|
|
if getattr(val, 'shape', ()) != () and len(val) > 6:
|
|
s = str(val[:6]) + '...'
|
|
else:
|
|
s = str(val)
|
|
s = s.replace('\n', ' ')
|
|
if len(s) > 50:
|
|
s = s[:50] + '...'
|
|
name = self.aliased_name(name)
|
|
lines.append(' %s = %s' % (name, s))
|
|
return lines
|
|
|
|
|
|
def getp(obj, property=None):
|
|
"""
|
|
Return the value of object's property. *property* is an optional string
|
|
for the property you want to return
|
|
|
|
Example usage::
|
|
|
|
getp(obj) # get all the object properties
|
|
getp(obj, 'linestyle') # get the linestyle property
|
|
|
|
*obj* is a :class:`Artist` instance, e.g.,
|
|
:class:`~matplotlib.lines.Line2D` or an instance of a
|
|
:class:`~matplotlib.axes.Axes` or :class:`matplotlib.text.Text`.
|
|
If the *property* is 'somename', this function returns
|
|
|
|
obj.get_somename()
|
|
|
|
:func:`getp` can be used to query all the gettable properties with
|
|
``getp(obj)``. Many properties have aliases for shorter typing, e.g.
|
|
'lw' is an alias for 'linewidth'. In the output, aliases and full
|
|
property names will be listed as:
|
|
|
|
property or alias = value
|
|
|
|
e.g.:
|
|
|
|
linewidth or lw = 2
|
|
"""
|
|
if property is None:
|
|
insp = ArtistInspector(obj)
|
|
ret = insp.pprint_getters()
|
|
print('\n'.join(ret))
|
|
return
|
|
|
|
func = getattr(obj, 'get_' + property)
|
|
return func()
|
|
|
|
# alias
|
|
get = getp
|
|
|
|
|
|
def setp(obj, *args, **kwargs):
|
|
"""
|
|
Set a property on an artist object.
|
|
|
|
matplotlib supports the use of :func:`setp` ("set property") and
|
|
:func:`getp` to set and get object properties, as well as to do
|
|
introspection on the object. For example, to set the linestyle of a
|
|
line to be dashed, you can do::
|
|
|
|
>>> line, = plot([1,2,3])
|
|
>>> setp(line, linestyle='--')
|
|
|
|
If you want to know the valid types of arguments, you can provide
|
|
the name of the property you want to set without a value::
|
|
|
|
>>> setp(line, 'linestyle')
|
|
linestyle: [ '-' | '--' | '-.' | ':' | 'steps' | 'None' ]
|
|
|
|
If you want to see all the properties that can be set, and their
|
|
possible values, you can do::
|
|
|
|
>>> setp(line)
|
|
... long output listing omitted
|
|
|
|
You may specify another output file to `setp` if `sys.stdout` is not
|
|
acceptable for some reason using the `file` keyword-only argument::
|
|
|
|
>>> with fopen('output.log') as f:
|
|
>>> setp(line, file=f)
|
|
|
|
:func:`setp` operates on a single instance or a iterable of
|
|
instances. If you are in query mode introspecting the possible
|
|
values, only the first instance in the sequence is used. When
|
|
actually setting values, all the instances will be set. e.g.,
|
|
suppose you have a list of two lines, the following will make both
|
|
lines thicker and red::
|
|
|
|
>>> x = arange(0,1.0,0.01)
|
|
>>> y1 = sin(2*pi*x)
|
|
>>> y2 = sin(4*pi*x)
|
|
>>> lines = plot(x, y1, x, y2)
|
|
>>> setp(lines, linewidth=2, color='r')
|
|
|
|
:func:`setp` works with the MATLAB style string/value pairs or
|
|
with python kwargs. For example, the following are equivalent::
|
|
|
|
>>> setp(lines, 'linewidth', 2, 'color', 'r') # MATLAB style
|
|
>>> setp(lines, linewidth=2, color='r') # python style
|
|
"""
|
|
|
|
if isinstance(obj, Artist):
|
|
objs = [obj]
|
|
else:
|
|
objs = list(cbook.flatten(obj))
|
|
|
|
if not objs:
|
|
return
|
|
|
|
insp = ArtistInspector(objs[0])
|
|
|
|
# file has to be popped before checking if kwargs is empty
|
|
printArgs = {}
|
|
if 'file' in kwargs:
|
|
printArgs['file'] = kwargs.pop('file')
|
|
|
|
if not kwargs and len(args) < 2:
|
|
if args:
|
|
print(insp.pprint_setters(prop=args[0]), **printArgs)
|
|
else:
|
|
print('\n'.join(insp.pprint_setters()), **printArgs)
|
|
return
|
|
|
|
if len(args) % 2:
|
|
raise ValueError('The set args must be string, value pairs')
|
|
|
|
# put args into ordereddict to maintain order
|
|
funcvals = OrderedDict((k, v) for k, v in zip(args[::2], args[1::2]))
|
|
ret = [o.update(funcvals) for o in objs] + [o.set(**kwargs) for o in objs]
|
|
return list(cbook.flatten(ret))
|
|
|
|
|
|
def kwdoc(artist):
|
|
r"""
|
|
Inspect an `~matplotlib.artist.Artist` class (using `.ArtistInspector`) and
|
|
return information about its settable properties and their current values.
|
|
|
|
Parameters
|
|
----------
|
|
artist : `~matplotlib.artist.Artist` or an iterable of `Artist`\s
|
|
|
|
Returns
|
|
-------
|
|
string
|
|
The settable properties of *artist*, as plain text if
|
|
:rc:`docstring.hardcopy` is False and as a rst table (intended for
|
|
use in Sphinx) if it is True.
|
|
"""
|
|
hardcopy = matplotlib.rcParams['docstring.hardcopy']
|
|
if hardcopy:
|
|
return '\n'.join(ArtistInspector(artist).pprint_setters_rest(
|
|
leadingspace=4))
|
|
else:
|
|
return '\n'.join(ArtistInspector(artist).pprint_setters(
|
|
leadingspace=2))
|
|
|
|
docstring.interpd.update(Artist=kwdoc(Artist))
|