forked from 170010011/fr
1525 lines
50 KiB
Python
1525 lines
50 KiB
Python
"""
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The 2D line class which can draw with a variety of line styles, markers and
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colors.
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"""
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# TODO: expose cap and join style attrs
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from numbers import Integral, Number, Real
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import logging
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import numpy as np
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import matplotlib as mpl
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from . import artist, cbook, colors as mcolors, docstring, rcParams
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from .artist import Artist, allow_rasterization
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from .cbook import (
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_to_unmasked_float_array, ls_mapper, ls_mapper_r, STEP_LOOKUP_MAP)
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from .markers import MarkerStyle
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from .path import Path
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from .transforms import (
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Affine2D, Bbox, BboxTransformFrom, BboxTransformTo, TransformedPath)
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# Imported here for backward compatibility, even though they don't
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# really belong.
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from . import _path
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from .markers import (
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CARETLEFT, CARETRIGHT, CARETUP, CARETDOWN,
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CARETLEFTBASE, CARETRIGHTBASE, CARETUPBASE, CARETDOWNBASE,
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TICKLEFT, TICKRIGHT, TICKUP, TICKDOWN)
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_log = logging.getLogger(__name__)
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def _get_dash_pattern(style):
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"""Convert linestyle to dash pattern."""
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# go from short hand -> full strings
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if isinstance(style, str):
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style = ls_mapper.get(style, style)
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# un-dashed styles
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if style in ['solid', 'None']:
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offset = 0
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dashes = None
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# dashed styles
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elif style in ['dashed', 'dashdot', 'dotted']:
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offset = 0
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dashes = tuple(rcParams['lines.{}_pattern'.format(style)])
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#
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elif isinstance(style, tuple):
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offset, dashes = style
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if offset is None:
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cbook.warn_deprecated(
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"3.3", message="Passing the dash offset as None is deprecated "
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"since %(since)s and support for it will be removed "
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"%(removal)s; pass it as zero instead.")
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offset = 0
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else:
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raise ValueError('Unrecognized linestyle: %s' % str(style))
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# normalize offset to be positive and shorter than the dash cycle
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if dashes is not None:
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dsum = sum(dashes)
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if dsum:
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offset %= dsum
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return offset, dashes
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def _scale_dashes(offset, dashes, lw):
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if not rcParams['lines.scale_dashes']:
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return offset, dashes
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scaled_offset = offset * lw
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scaled_dashes = ([x * lw if x is not None else None for x in dashes]
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if dashes is not None else None)
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return scaled_offset, scaled_dashes
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def segment_hits(cx, cy, x, y, radius):
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"""
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Return the indices of the segments in the polyline with coordinates (*cx*,
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*cy*) that are within a distance *radius* of the point (*x*, *y*).
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"""
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# Process single points specially
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if len(x) <= 1:
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res, = np.nonzero((cx - x) ** 2 + (cy - y) ** 2 <= radius ** 2)
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return res
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# We need to lop the last element off a lot.
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xr, yr = x[:-1], y[:-1]
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# Only look at line segments whose nearest point to C on the line
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# lies within the segment.
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dx, dy = x[1:] - xr, y[1:] - yr
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Lnorm_sq = dx ** 2 + dy ** 2 # Possibly want to eliminate Lnorm==0
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u = ((cx - xr) * dx + (cy - yr) * dy) / Lnorm_sq
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candidates = (u >= 0) & (u <= 1)
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# Note that there is a little area near one side of each point
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# which will be near neither segment, and another which will
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# be near both, depending on the angle of the lines. The
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# following radius test eliminates these ambiguities.
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point_hits = (cx - x) ** 2 + (cy - y) ** 2 <= radius ** 2
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candidates = candidates & ~(point_hits[:-1] | point_hits[1:])
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# For those candidates which remain, determine how far they lie away
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# from the line.
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px, py = xr + u * dx, yr + u * dy
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line_hits = (cx - px) ** 2 + (cy - py) ** 2 <= radius ** 2
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line_hits = line_hits & candidates
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points, = point_hits.ravel().nonzero()
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lines, = line_hits.ravel().nonzero()
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return np.concatenate((points, lines))
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def _mark_every_path(markevery, tpath, affine, ax_transform):
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"""
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Helper function that sorts out how to deal the input
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`markevery` and returns the points where markers should be drawn.
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Takes in the `markevery` value and the line path and returns the
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sub-sampled path.
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"""
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# pull out the two bits of data we want from the path
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codes, verts = tpath.codes, tpath.vertices
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def _slice_or_none(in_v, slc):
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"""Helper function to cope with `codes` being an ndarray or `None`."""
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if in_v is None:
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return None
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return in_v[slc]
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# if just an int, assume starting at 0 and make a tuple
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if isinstance(markevery, Integral):
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markevery = (0, markevery)
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# if just a float, assume starting at 0.0 and make a tuple
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elif isinstance(markevery, Real):
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markevery = (0.0, markevery)
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if isinstance(markevery, tuple):
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if len(markevery) != 2:
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raise ValueError('`markevery` is a tuple but its len is not 2; '
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'markevery={}'.format(markevery))
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start, step = markevery
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# if step is an int, old behavior
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if isinstance(step, Integral):
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# tuple of 2 int is for backwards compatibility,
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if not isinstance(start, Integral):
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raise ValueError(
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'`markevery` is a tuple with len 2 and second element is '
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'an int, but the first element is not an int; markevery={}'
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.format(markevery))
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# just return, we are done here
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return Path(verts[slice(start, None, step)],
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_slice_or_none(codes, slice(start, None, step)))
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elif isinstance(step, Real):
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if not isinstance(start, Real):
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raise ValueError(
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'`markevery` is a tuple with len 2 and second element is '
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'a float, but the first element is not a float or an int; '
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'markevery={}'.format(markevery))
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# calc cumulative distance along path (in display coords):
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disp_coords = affine.transform(tpath.vertices)
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delta = np.empty((len(disp_coords), 2))
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delta[0, :] = 0
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delta[1:, :] = disp_coords[1:, :] - disp_coords[:-1, :]
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delta = np.hypot(*delta.T).cumsum()
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# calc distance between markers along path based on the axes
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# bounding box diagonal being a distance of unity:
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(x0, y0), (x1, y1) = ax_transform.transform([[0, 0], [1, 1]])
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scale = np.hypot(x1 - x0, y1 - y0)
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marker_delta = np.arange(start * scale, delta[-1], step * scale)
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# find closest actual data point that is closest to
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# the theoretical distance along the path:
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inds = np.abs(delta[np.newaxis, :] - marker_delta[:, np.newaxis])
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inds = inds.argmin(axis=1)
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inds = np.unique(inds)
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# return, we are done here
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return Path(verts[inds], _slice_or_none(codes, inds))
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else:
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raise ValueError(
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f"markevery={markevery!r} is a tuple with len 2, but its "
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f"second element is not an int or a float")
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elif isinstance(markevery, slice):
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# mazol tov, it's already a slice, just return
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return Path(verts[markevery], _slice_or_none(codes, markevery))
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elif np.iterable(markevery):
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# fancy indexing
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try:
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return Path(verts[markevery], _slice_or_none(codes, markevery))
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except (ValueError, IndexError) as err:
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raise ValueError(
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f"markevery={markevery!r} is iterable but not a valid numpy "
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f"fancy index") from err
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else:
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raise ValueError(f"markevery={markevery!r} is not a recognized value")
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@cbook._define_aliases({
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"antialiased": ["aa"],
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"color": ["c"],
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"drawstyle": ["ds"],
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"linestyle": ["ls"],
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"linewidth": ["lw"],
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"markeredgecolor": ["mec"],
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"markeredgewidth": ["mew"],
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"markerfacecolor": ["mfc"],
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"markerfacecoloralt": ["mfcalt"],
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"markersize": ["ms"],
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})
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class Line2D(Artist):
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"""
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A line - the line can have both a solid linestyle connecting all
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the vertices, and a marker at each vertex. Additionally, the
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drawing of the solid line is influenced by the drawstyle, e.g., one
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can create "stepped" lines in various styles.
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"""
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lineStyles = _lineStyles = { # hidden names deprecated
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'-': '_draw_solid',
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'--': '_draw_dashed',
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'-.': '_draw_dash_dot',
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':': '_draw_dotted',
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'None': '_draw_nothing',
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' ': '_draw_nothing',
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'': '_draw_nothing',
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}
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_drawStyles_l = {
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'default': '_draw_lines',
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'steps-mid': '_draw_steps_mid',
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'steps-pre': '_draw_steps_pre',
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'steps-post': '_draw_steps_post',
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}
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_drawStyles_s = {
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'steps': '_draw_steps_pre',
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}
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# drawStyles should now be deprecated.
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drawStyles = {**_drawStyles_l, **_drawStyles_s}
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# Need a list ordered with long names first:
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drawStyleKeys = [*_drawStyles_l, *_drawStyles_s]
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# Referenced here to maintain API. These are defined in
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# MarkerStyle
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markers = MarkerStyle.markers
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filled_markers = MarkerStyle.filled_markers
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fillStyles = MarkerStyle.fillstyles
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zorder = 2
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validCap = ('butt', 'round', 'projecting')
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validJoin = ('miter', 'round', 'bevel')
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def __str__(self):
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if self._label != "":
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return f"Line2D({self._label})"
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elif self._x is None:
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return "Line2D()"
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elif len(self._x) > 3:
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return "Line2D((%g,%g),(%g,%g),...,(%g,%g))" % (
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self._x[0], self._y[0], self._x[0],
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self._y[0], self._x[-1], self._y[-1])
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else:
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return "Line2D(%s)" % ",".join(
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map("({:g},{:g})".format, self._x, self._y))
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def __init__(self, xdata, ydata,
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linewidth=None, # all Nones default to rc
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linestyle=None,
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color=None,
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marker=None,
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markersize=None,
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markeredgewidth=None,
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markeredgecolor=None,
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markerfacecolor=None,
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markerfacecoloralt='none',
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fillstyle=None,
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antialiased=None,
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dash_capstyle=None,
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solid_capstyle=None,
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dash_joinstyle=None,
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solid_joinstyle=None,
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pickradius=5,
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drawstyle=None,
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markevery=None,
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**kwargs
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):
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"""
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Create a `.Line2D` instance with *x* and *y* data in sequences of
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*xdata*, *ydata*.
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Additional keyword arguments are `.Line2D` properties:
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%(_Line2D_docstr)s
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See :meth:`set_linestyle` for a description of the line styles,
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:meth:`set_marker` for a description of the markers, and
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:meth:`set_drawstyle` for a description of the draw styles.
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"""
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Artist.__init__(self)
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#convert sequences to numpy arrays
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if not np.iterable(xdata):
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raise RuntimeError('xdata must be a sequence')
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if not np.iterable(ydata):
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raise RuntimeError('ydata must be a sequence')
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if linewidth is None:
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linewidth = rcParams['lines.linewidth']
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if linestyle is None:
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linestyle = rcParams['lines.linestyle']
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if marker is None:
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marker = rcParams['lines.marker']
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if markerfacecolor is None:
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markerfacecolor = rcParams['lines.markerfacecolor']
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if markeredgecolor is None:
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markeredgecolor = rcParams['lines.markeredgecolor']
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if color is None:
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color = rcParams['lines.color']
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if markersize is None:
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markersize = rcParams['lines.markersize']
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if antialiased is None:
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antialiased = rcParams['lines.antialiased']
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if dash_capstyle is None:
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dash_capstyle = rcParams['lines.dash_capstyle']
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if dash_joinstyle is None:
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dash_joinstyle = rcParams['lines.dash_joinstyle']
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if solid_capstyle is None:
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solid_capstyle = rcParams['lines.solid_capstyle']
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if solid_joinstyle is None:
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solid_joinstyle = rcParams['lines.solid_joinstyle']
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if drawstyle is None:
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drawstyle = 'default'
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self._dashcapstyle = None
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self._dashjoinstyle = None
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self._solidjoinstyle = None
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self._solidcapstyle = None
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self.set_dash_capstyle(dash_capstyle)
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self.set_dash_joinstyle(dash_joinstyle)
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self.set_solid_capstyle(solid_capstyle)
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self.set_solid_joinstyle(solid_joinstyle)
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self._linestyles = None
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self._drawstyle = None
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self._linewidth = linewidth
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# scaled dash + offset
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self._dashSeq = None
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self._dashOffset = 0
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# unscaled dash + offset
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# this is needed scaling the dash pattern by linewidth
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self._us_dashSeq = None
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self._us_dashOffset = 0
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self.set_linewidth(linewidth)
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self.set_linestyle(linestyle)
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self.set_drawstyle(drawstyle)
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self._color = None
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self.set_color(color)
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self._marker = MarkerStyle(marker, fillstyle)
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self._markevery = None
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self._markersize = None
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self._antialiased = None
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self.set_markevery(markevery)
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self.set_antialiased(antialiased)
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self.set_markersize(markersize)
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self._markeredgecolor = None
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self._markeredgewidth = None
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self._markerfacecolor = None
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self._markerfacecoloralt = None
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self.set_markerfacecolor(markerfacecolor)
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self.set_markerfacecoloralt(markerfacecoloralt)
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self.set_markeredgecolor(markeredgecolor)
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self.set_markeredgewidth(markeredgewidth)
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# update kwargs before updating data to give the caller a
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# chance to init axes (and hence unit support)
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self.update(kwargs)
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self.pickradius = pickradius
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self.ind_offset = 0
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self._xorig = np.asarray([])
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self._yorig = np.asarray([])
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self._invalidx = True
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self._invalidy = True
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self._x = None
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self._y = None
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self._xy = None
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self._path = None
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self._transformed_path = None
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self._subslice = False
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self._x_filled = None # used in subslicing; only x is needed
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self.set_data(xdata, ydata)
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def contains(self, mouseevent):
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"""
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Test whether *mouseevent* occurred on the line.
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An event is deemed to have occurred "on" the line if it is less
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than ``self.pickradius`` (default: 5 points) away from it. Use
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`~.Line2D.get_pickradius` or `~.Line2D.set_pickradius` to get or set
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the pick radius.
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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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A dictionary ``{'ind': pointlist}``, where *pointlist* is a
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list of points of the line that are within the pickradius around
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the event position.
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TODO: sort returned indices by distance
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"""
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inside, info = self._default_contains(mouseevent)
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if inside is not None:
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return inside, info
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# Make sure we have data to plot
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if self._invalidy or self._invalidx:
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self.recache()
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if len(self._xy) == 0:
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return False, {}
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# Convert points to pixels
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transformed_path = self._get_transformed_path()
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path, affine = transformed_path.get_transformed_path_and_affine()
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path = affine.transform_path(path)
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xy = path.vertices
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xt = xy[:, 0]
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yt = xy[:, 1]
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# Convert pick radius from points to pixels
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if self.figure is None:
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_log.warning('no figure set when check if mouse is on line')
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pixels = self.pickradius
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else:
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pixels = self.figure.dpi / 72. * self.pickradius
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# The math involved in checking for containment (here and inside of
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# segment_hits) assumes that it is OK to overflow, so temporarily set
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# the error flags accordingly.
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with np.errstate(all='ignore'):
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# Check for collision
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if self._linestyle in ['None', None]:
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# If no line, return the nearby point(s)
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ind, = np.nonzero(
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(xt - mouseevent.x) ** 2 + (yt - mouseevent.y) ** 2
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<= pixels ** 2)
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else:
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# If line, return the nearby segment(s)
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ind = segment_hits(mouseevent.x, mouseevent.y, xt, yt, pixels)
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if self._drawstyle.startswith("steps"):
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ind //= 2
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ind += self.ind_offset
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# Return the point(s) within radius
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return len(ind) > 0, dict(ind=ind)
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def get_pickradius(self):
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"""
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Return the pick radius used for containment tests.
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See `.contains` for more details.
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"""
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return self._pickradius
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def set_pickradius(self, d):
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"""
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Set the pick radius used for containment tests.
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See `.contains` for more details.
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Parameters
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----------
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d : float
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Pick radius, in points.
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"""
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if not isinstance(d, Number) or d < 0:
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raise ValueError("pick radius should be a distance")
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self._pickradius = d
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pickradius = property(get_pickradius, set_pickradius)
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def get_fillstyle(self):
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"""
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Return the marker fill style.
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See also `~.Line2D.set_fillstyle`.
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"""
|
|
return self._marker.get_fillstyle()
|
|
|
|
def set_fillstyle(self, fs):
|
|
"""
|
|
Set the marker fill style.
|
|
|
|
Parameters
|
|
----------
|
|
fs : {'full', 'left', 'right', 'bottom', 'top', 'none'}
|
|
Possible values:
|
|
|
|
- 'full': Fill the whole marker with the *markerfacecolor*.
|
|
- 'left', 'right', 'bottom', 'top': Fill the marker half at
|
|
the given side with the *markerfacecolor*. The other
|
|
half of the marker is filled with *markerfacecoloralt*.
|
|
- 'none': No filling.
|
|
|
|
For examples see :ref:`marker_fill_styles`.
|
|
"""
|
|
self._marker.set_fillstyle(fs)
|
|
self.stale = True
|
|
|
|
def set_markevery(self, every):
|
|
"""
|
|
Set the markevery property to subsample the plot when using markers.
|
|
|
|
e.g., if ``every=5``, every 5-th marker will be plotted.
|
|
|
|
Parameters
|
|
----------
|
|
every : None or int or (int, int) or slice or List[int] or float or \
|
|
(float, float) or List[bool]
|
|
Which markers to plot.
|
|
|
|
- every=None, every point will be plotted.
|
|
- every=N, every N-th marker will be plotted starting with
|
|
marker 0.
|
|
- every=(start, N), every N-th marker, starting at point
|
|
start, will be plotted.
|
|
- every=slice(start, end, N), every N-th marker, starting at
|
|
point start, up to but not including point end, will be plotted.
|
|
- every=[i, j, m, n], only markers at points i, j, m, and n
|
|
will be plotted.
|
|
- every=[True, False, True], positions that are True will be
|
|
plotted.
|
|
- every=0.1, (i.e. a float) then markers will be spaced at
|
|
approximately equal distances along the line; the distance
|
|
along the line between markers is determined by multiplying the
|
|
display-coordinate distance of the axes bounding-box diagonal
|
|
by the value of every.
|
|
- every=(0.5, 0.1) (i.e. a length-2 tuple of float), the same
|
|
functionality as every=0.1 is exhibited but the first marker will
|
|
be 0.5 multiplied by the display-coordinate-diagonal-distance
|
|
along the line.
|
|
|
|
For examples see
|
|
:doc:`/gallery/lines_bars_and_markers/markevery_demo`.
|
|
|
|
Notes
|
|
-----
|
|
Setting the markevery property will only show markers at actual data
|
|
points. When using float arguments to set the markevery property
|
|
on irregularly spaced data, the markers will likely not appear evenly
|
|
spaced because the actual data points do not coincide with the
|
|
theoretical spacing between markers.
|
|
|
|
When using a start offset to specify the first marker, the offset will
|
|
be from the first data point which may be different from the first
|
|
the visible data point if the plot is zoomed in.
|
|
|
|
If zooming in on a plot when using float arguments then the actual
|
|
data points that have markers will change because the distance between
|
|
markers is always determined from the display-coordinates
|
|
axes-bounding-box-diagonal regardless of the actual axes data limits.
|
|
|
|
"""
|
|
self._markevery = every
|
|
self.stale = True
|
|
|
|
def get_markevery(self):
|
|
"""
|
|
Return the markevery setting for marker subsampling.
|
|
|
|
See also `~.Line2D.set_markevery`.
|
|
"""
|
|
return self._markevery
|
|
|
|
def set_picker(self, p):
|
|
# docstring inherited
|
|
if isinstance(p, Number) and not isinstance(p, bool):
|
|
# After deprecation, the whole method can be deleted and inherited.
|
|
cbook.warn_deprecated(
|
|
"3.3", message="Setting the line's pick radius via set_picker "
|
|
"is deprecated since %(since)s and will be removed "
|
|
"%(removal)s; use set_pickradius instead.")
|
|
self.pickradius = p
|
|
self._picker = p
|
|
|
|
def get_window_extent(self, renderer):
|
|
bbox = Bbox([[0, 0], [0, 0]])
|
|
trans_data_to_xy = self.get_transform().transform
|
|
bbox.update_from_data_xy(trans_data_to_xy(self.get_xydata()),
|
|
ignore=True)
|
|
# correct for marker size, if any
|
|
if self._marker:
|
|
ms = (self._markersize / 72.0 * self.figure.dpi) * 0.5
|
|
bbox = bbox.padded(ms)
|
|
return bbox
|
|
|
|
@Artist.axes.setter
|
|
def axes(self, ax):
|
|
# call the set method from the base-class property
|
|
Artist.axes.fset(self, ax)
|
|
if ax is not None:
|
|
# connect unit-related callbacks
|
|
if ax.xaxis is not None:
|
|
self._xcid = ax.xaxis.callbacks.connect('units',
|
|
self.recache_always)
|
|
if ax.yaxis is not None:
|
|
self._ycid = ax.yaxis.callbacks.connect('units',
|
|
self.recache_always)
|
|
|
|
def set_data(self, *args):
|
|
"""
|
|
Set the x and y data.
|
|
|
|
Parameters
|
|
----------
|
|
*args : (2, N) array or two 1D arrays
|
|
"""
|
|
if len(args) == 1:
|
|
(x, y), = args
|
|
else:
|
|
x, y = args
|
|
|
|
self.set_xdata(x)
|
|
self.set_ydata(y)
|
|
|
|
def recache_always(self):
|
|
self.recache(always=True)
|
|
|
|
def recache(self, always=False):
|
|
if always or self._invalidx:
|
|
xconv = self.convert_xunits(self._xorig)
|
|
x = _to_unmasked_float_array(xconv).ravel()
|
|
else:
|
|
x = self._x
|
|
if always or self._invalidy:
|
|
yconv = self.convert_yunits(self._yorig)
|
|
y = _to_unmasked_float_array(yconv).ravel()
|
|
else:
|
|
y = self._y
|
|
|
|
self._xy = np.column_stack(np.broadcast_arrays(x, y)).astype(float)
|
|
self._x, self._y = self._xy.T # views
|
|
|
|
self._subslice = False
|
|
if (self.axes and len(x) > 1000 and self._is_sorted(x) and
|
|
self.axes.name == 'rectilinear' and
|
|
self.axes.get_xscale() == 'linear' and
|
|
self._markevery is None and
|
|
self.get_clip_on()):
|
|
self._subslice = True
|
|
nanmask = np.isnan(x)
|
|
if nanmask.any():
|
|
self._x_filled = self._x.copy()
|
|
indices = np.arange(len(x))
|
|
self._x_filled[nanmask] = np.interp(
|
|
indices[nanmask], indices[~nanmask], self._x[~nanmask])
|
|
else:
|
|
self._x_filled = self._x
|
|
|
|
if self._path is not None:
|
|
interpolation_steps = self._path._interpolation_steps
|
|
else:
|
|
interpolation_steps = 1
|
|
xy = STEP_LOOKUP_MAP[self._drawstyle](*self._xy.T)
|
|
self._path = Path(np.asarray(xy).T,
|
|
_interpolation_steps=interpolation_steps)
|
|
self._transformed_path = None
|
|
self._invalidx = False
|
|
self._invalidy = False
|
|
|
|
def _transform_path(self, subslice=None):
|
|
"""
|
|
Puts a TransformedPath instance at self._transformed_path;
|
|
all invalidation of the transform is then handled by the
|
|
TransformedPath instance.
|
|
"""
|
|
# Masked arrays are now handled by the Path class itself
|
|
if subslice is not None:
|
|
xy = STEP_LOOKUP_MAP[self._drawstyle](*self._xy[subslice, :].T)
|
|
_path = Path(np.asarray(xy).T,
|
|
_interpolation_steps=self._path._interpolation_steps)
|
|
else:
|
|
_path = self._path
|
|
self._transformed_path = TransformedPath(_path, self.get_transform())
|
|
|
|
def _get_transformed_path(self):
|
|
"""
|
|
Return the :class:`~matplotlib.transforms.TransformedPath` instance
|
|
of this line.
|
|
"""
|
|
if self._transformed_path is None:
|
|
self._transform_path()
|
|
return self._transformed_path
|
|
|
|
def set_transform(self, t):
|
|
"""
|
|
Set the Transformation instance used by this artist.
|
|
|
|
Parameters
|
|
----------
|
|
t : `matplotlib.transforms.Transform`
|
|
"""
|
|
Artist.set_transform(self, t)
|
|
self._invalidx = True
|
|
self._invalidy = True
|
|
self.stale = True
|
|
|
|
def _is_sorted(self, x):
|
|
"""Return whether x is sorted in ascending order."""
|
|
# We don't handle the monotonically decreasing case.
|
|
return _path.is_sorted(x)
|
|
|
|
@allow_rasterization
|
|
def draw(self, renderer):
|
|
# docstring inherited
|
|
|
|
if not self.get_visible():
|
|
return
|
|
|
|
if self._invalidy or self._invalidx:
|
|
self.recache()
|
|
self.ind_offset = 0 # Needed for contains() method.
|
|
if self._subslice and self.axes:
|
|
x0, x1 = self.axes.get_xbound()
|
|
i0 = self._x_filled.searchsorted(x0, 'left')
|
|
i1 = self._x_filled.searchsorted(x1, 'right')
|
|
subslice = slice(max(i0 - 1, 0), i1 + 1)
|
|
self.ind_offset = subslice.start
|
|
self._transform_path(subslice)
|
|
else:
|
|
subslice = None
|
|
|
|
if self.get_path_effects():
|
|
from matplotlib.patheffects import PathEffectRenderer
|
|
renderer = PathEffectRenderer(self.get_path_effects(), renderer)
|
|
|
|
renderer.open_group('line2d', self.get_gid())
|
|
if self._lineStyles[self._linestyle] != '_draw_nothing':
|
|
tpath, affine = (self._get_transformed_path()
|
|
.get_transformed_path_and_affine())
|
|
if len(tpath.vertices):
|
|
gc = renderer.new_gc()
|
|
self._set_gc_clip(gc)
|
|
gc.set_url(self.get_url())
|
|
|
|
lc_rgba = mcolors.to_rgba(self._color, self._alpha)
|
|
gc.set_foreground(lc_rgba, isRGBA=True)
|
|
|
|
gc.set_antialiased(self._antialiased)
|
|
gc.set_linewidth(self._linewidth)
|
|
|
|
if self.is_dashed():
|
|
cap = self._dashcapstyle
|
|
join = self._dashjoinstyle
|
|
else:
|
|
cap = self._solidcapstyle
|
|
join = self._solidjoinstyle
|
|
gc.set_joinstyle(join)
|
|
gc.set_capstyle(cap)
|
|
gc.set_snap(self.get_snap())
|
|
if self.get_sketch_params() is not None:
|
|
gc.set_sketch_params(*self.get_sketch_params())
|
|
|
|
gc.set_dashes(self._dashOffset, self._dashSeq)
|
|
renderer.draw_path(gc, tpath, affine.frozen())
|
|
gc.restore()
|
|
|
|
if self._marker and self._markersize > 0:
|
|
gc = renderer.new_gc()
|
|
self._set_gc_clip(gc)
|
|
gc.set_url(self.get_url())
|
|
gc.set_linewidth(self._markeredgewidth)
|
|
gc.set_antialiased(self._antialiased)
|
|
|
|
ec_rgba = mcolors.to_rgba(
|
|
self.get_markeredgecolor(), self._alpha)
|
|
fc_rgba = mcolors.to_rgba(
|
|
self._get_markerfacecolor(), self._alpha)
|
|
fcalt_rgba = mcolors.to_rgba(
|
|
self._get_markerfacecolor(alt=True), self._alpha)
|
|
# If the edgecolor is "auto", it is set according to the *line*
|
|
# color but inherits the alpha value of the *face* color, if any.
|
|
if (cbook._str_equal(self._markeredgecolor, "auto")
|
|
and not cbook._str_lower_equal(
|
|
self.get_markerfacecolor(), "none")):
|
|
ec_rgba = ec_rgba[:3] + (fc_rgba[3],)
|
|
gc.set_foreground(ec_rgba, isRGBA=True)
|
|
if self.get_sketch_params() is not None:
|
|
scale, length, randomness = self.get_sketch_params()
|
|
gc.set_sketch_params(scale/2, length/2, 2*randomness)
|
|
|
|
marker = self._marker
|
|
|
|
# Markers *must* be drawn ignoring the drawstyle (but don't pay the
|
|
# recaching if drawstyle is already "default").
|
|
if self.get_drawstyle() != "default":
|
|
with cbook._setattr_cm(
|
|
self, _drawstyle="default", _transformed_path=None):
|
|
self.recache()
|
|
self._transform_path(subslice)
|
|
tpath, affine = (self._get_transformed_path()
|
|
.get_transformed_points_and_affine())
|
|
else:
|
|
tpath, affine = (self._get_transformed_path()
|
|
.get_transformed_points_and_affine())
|
|
|
|
if len(tpath.vertices):
|
|
# subsample the markers if markevery is not None
|
|
markevery = self.get_markevery()
|
|
if markevery is not None:
|
|
subsampled = _mark_every_path(markevery, tpath,
|
|
affine, self.axes.transAxes)
|
|
else:
|
|
subsampled = tpath
|
|
|
|
snap = marker.get_snap_threshold()
|
|
if isinstance(snap, Real):
|
|
snap = renderer.points_to_pixels(self._markersize) >= snap
|
|
gc.set_snap(snap)
|
|
gc.set_joinstyle(marker.get_joinstyle())
|
|
gc.set_capstyle(marker.get_capstyle())
|
|
marker_path = marker.get_path()
|
|
marker_trans = marker.get_transform()
|
|
w = renderer.points_to_pixels(self._markersize)
|
|
|
|
if cbook._str_equal(marker.get_marker(), ","):
|
|
gc.set_linewidth(0)
|
|
else:
|
|
# Don't scale for pixels, and don't stroke them
|
|
marker_trans = marker_trans.scale(w)
|
|
renderer.draw_markers(gc, marker_path, marker_trans,
|
|
subsampled, affine.frozen(),
|
|
fc_rgba)
|
|
|
|
alt_marker_path = marker.get_alt_path()
|
|
if alt_marker_path:
|
|
alt_marker_trans = marker.get_alt_transform()
|
|
alt_marker_trans = alt_marker_trans.scale(w)
|
|
renderer.draw_markers(
|
|
gc, alt_marker_path, alt_marker_trans, subsampled,
|
|
affine.frozen(), fcalt_rgba)
|
|
|
|
gc.restore()
|
|
|
|
renderer.close_group('line2d')
|
|
self.stale = False
|
|
|
|
def get_antialiased(self):
|
|
"""Return whether antialiased rendering is used."""
|
|
return self._antialiased
|
|
|
|
def get_color(self):
|
|
"""
|
|
Return the line color.
|
|
|
|
See also `~.Line2D.set_color`.
|
|
"""
|
|
return self._color
|
|
|
|
def get_drawstyle(self):
|
|
"""
|
|
Return the drawstyle.
|
|
|
|
See also `~.Line2D.set_drawstyle`.
|
|
"""
|
|
return self._drawstyle
|
|
|
|
def get_linestyle(self):
|
|
"""
|
|
Return the linestyle.
|
|
|
|
See also `~.Line2D.set_linestyle`.
|
|
"""
|
|
return self._linestyle
|
|
|
|
def get_linewidth(self):
|
|
"""
|
|
Return the linewidth in points.
|
|
|
|
See also `~.Line2D.set_linewidth`.
|
|
"""
|
|
return self._linewidth
|
|
|
|
def get_marker(self):
|
|
"""
|
|
Return the line marker.
|
|
|
|
See also `~.Line2D.set_marker`.
|
|
"""
|
|
return self._marker.get_marker()
|
|
|
|
def get_markeredgecolor(self):
|
|
"""
|
|
Return the marker edge color.
|
|
|
|
See also `~.Line2D.set_markeredgecolor`.
|
|
"""
|
|
mec = self._markeredgecolor
|
|
if cbook._str_equal(mec, 'auto'):
|
|
if rcParams['_internal.classic_mode']:
|
|
if self._marker.get_marker() in ('.', ','):
|
|
return self._color
|
|
if self._marker.is_filled() and self.get_fillstyle() != 'none':
|
|
return 'k' # Bad hard-wired default...
|
|
return self._color
|
|
else:
|
|
return mec
|
|
|
|
def get_markeredgewidth(self):
|
|
"""
|
|
Return the marker edge width in points.
|
|
|
|
See also `~.Line2D.set_markeredgewidth`.
|
|
"""
|
|
return self._markeredgewidth
|
|
|
|
def _get_markerfacecolor(self, alt=False):
|
|
if self.get_fillstyle() == 'none':
|
|
return 'none'
|
|
fc = self._markerfacecoloralt if alt else self._markerfacecolor
|
|
if cbook._str_lower_equal(fc, 'auto'):
|
|
return self._color
|
|
else:
|
|
return fc
|
|
|
|
def get_markerfacecolor(self):
|
|
"""
|
|
Return the marker face color.
|
|
|
|
See also `~.Line2D.set_markerfacecolor`.
|
|
"""
|
|
return self._get_markerfacecolor(alt=False)
|
|
|
|
def get_markerfacecoloralt(self):
|
|
"""
|
|
Return the alternate marker face color.
|
|
|
|
See also `~.Line2D.set_markerfacecoloralt`.
|
|
"""
|
|
return self._get_markerfacecolor(alt=True)
|
|
|
|
def get_markersize(self):
|
|
"""
|
|
Return the marker size in points.
|
|
|
|
See also `~.Line2D.set_markersize`.
|
|
"""
|
|
return self._markersize
|
|
|
|
def get_data(self, orig=True):
|
|
"""
|
|
Return the xdata, ydata.
|
|
|
|
If *orig* is *True*, return the original data.
|
|
"""
|
|
return self.get_xdata(orig=orig), self.get_ydata(orig=orig)
|
|
|
|
def get_xdata(self, orig=True):
|
|
"""
|
|
Return the xdata.
|
|
|
|
If *orig* is *True*, return the original data, else the
|
|
processed data.
|
|
"""
|
|
if orig:
|
|
return self._xorig
|
|
if self._invalidx:
|
|
self.recache()
|
|
return self._x
|
|
|
|
def get_ydata(self, orig=True):
|
|
"""
|
|
Return the ydata.
|
|
|
|
If *orig* is *True*, return the original data, else the
|
|
processed data.
|
|
"""
|
|
if orig:
|
|
return self._yorig
|
|
if self._invalidy:
|
|
self.recache()
|
|
return self._y
|
|
|
|
def get_path(self):
|
|
"""
|
|
Return the :class:`~matplotlib.path.Path` object associated
|
|
with this line.
|
|
"""
|
|
if self._invalidy or self._invalidx:
|
|
self.recache()
|
|
return self._path
|
|
|
|
def get_xydata(self):
|
|
"""
|
|
Return the *xy* data as a Nx2 numpy array.
|
|
"""
|
|
if self._invalidy or self._invalidx:
|
|
self.recache()
|
|
return self._xy
|
|
|
|
def set_antialiased(self, b):
|
|
"""
|
|
Set whether to use antialiased rendering.
|
|
|
|
Parameters
|
|
----------
|
|
b : bool
|
|
"""
|
|
if self._antialiased != b:
|
|
self.stale = True
|
|
self._antialiased = b
|
|
|
|
def set_color(self, color):
|
|
"""
|
|
Set the color of the line.
|
|
|
|
Parameters
|
|
----------
|
|
color : color
|
|
"""
|
|
self._color = color
|
|
self.stale = True
|
|
|
|
def set_drawstyle(self, drawstyle):
|
|
"""
|
|
Set the drawstyle of the plot.
|
|
|
|
The drawstyle determines how the points are connected.
|
|
|
|
Parameters
|
|
----------
|
|
drawstyle : {'default', 'steps', 'steps-pre', 'steps-mid', \
|
|
'steps-post'}, default: 'default'
|
|
For 'default', the points are connected with straight lines.
|
|
|
|
The steps variants connect the points with step-like lines,
|
|
i.e. horizontal lines with vertical steps. They differ in the
|
|
location of the step:
|
|
|
|
- 'steps-pre': The step is at the beginning of the line segment,
|
|
i.e. the line will be at the y-value of point to the right.
|
|
- 'steps-mid': The step is halfway between the points.
|
|
- 'steps-post: The step is at the end of the line segment,
|
|
i.e. the line will be at the y-value of the point to the left.
|
|
- 'steps' is equal to 'steps-pre' and is maintained for
|
|
backward-compatibility.
|
|
|
|
For examples see :doc:`/gallery/lines_bars_and_markers/step_demo`.
|
|
"""
|
|
if drawstyle is None:
|
|
drawstyle = 'default'
|
|
cbook._check_in_list(self.drawStyles, drawstyle=drawstyle)
|
|
if self._drawstyle != drawstyle:
|
|
self.stale = True
|
|
# invalidate to trigger a recache of the path
|
|
self._invalidx = True
|
|
self._drawstyle = drawstyle
|
|
|
|
def set_linewidth(self, w):
|
|
"""
|
|
Set the line width in points.
|
|
|
|
Parameters
|
|
----------
|
|
w : float
|
|
Line width, in points.
|
|
"""
|
|
w = float(w)
|
|
|
|
if self._linewidth != w:
|
|
self.stale = True
|
|
self._linewidth = w
|
|
# rescale the dashes + offset
|
|
self._dashOffset, self._dashSeq = _scale_dashes(
|
|
self._us_dashOffset, self._us_dashSeq, self._linewidth)
|
|
|
|
def set_linestyle(self, ls):
|
|
"""
|
|
Set the linestyle of the line.
|
|
|
|
Parameters
|
|
----------
|
|
ls : {'-', '--', '-.', ':', '', (offset, on-off-seq), ...}
|
|
Possible values:
|
|
|
|
- A string:
|
|
|
|
=============================== =================
|
|
Linestyle Description
|
|
=============================== =================
|
|
``'-'`` or ``'solid'`` solid line
|
|
``'--'`` or ``'dashed'`` dashed line
|
|
``'-.'`` or ``'dashdot'`` dash-dotted line
|
|
``':'`` or ``'dotted'`` dotted line
|
|
``'None'`` or ``' '`` or ``''`` draw nothing
|
|
=============================== =================
|
|
|
|
- Alternatively a dash tuple of the following form can be
|
|
provided::
|
|
|
|
(offset, onoffseq)
|
|
|
|
where ``onoffseq`` is an even length tuple of on and off ink
|
|
in points. See also :meth:`set_dashes`.
|
|
|
|
For examples see :doc:`/gallery/lines_bars_and_markers/linestyles`.
|
|
"""
|
|
if isinstance(ls, str):
|
|
if ls in [' ', '', 'none']:
|
|
ls = 'None'
|
|
|
|
cbook._check_in_list([*self._lineStyles, *ls_mapper_r], ls=ls)
|
|
if ls not in self._lineStyles:
|
|
ls = ls_mapper_r[ls]
|
|
self._linestyle = ls
|
|
else:
|
|
self._linestyle = '--'
|
|
|
|
# get the unscaled dashes
|
|
self._us_dashOffset, self._us_dashSeq = _get_dash_pattern(ls)
|
|
# compute the linewidth scaled dashes
|
|
self._dashOffset, self._dashSeq = _scale_dashes(
|
|
self._us_dashOffset, self._us_dashSeq, self._linewidth)
|
|
|
|
@docstring.dedent_interpd
|
|
def set_marker(self, marker):
|
|
"""
|
|
Set the line marker.
|
|
|
|
Parameters
|
|
----------
|
|
marker : marker style string, `~.path.Path` or `~.markers.MarkerStyle`
|
|
See `~matplotlib.markers` for full description of possible
|
|
arguments.
|
|
"""
|
|
self._marker.set_marker(marker)
|
|
self.stale = True
|
|
|
|
def set_markeredgecolor(self, ec):
|
|
"""
|
|
Set the marker edge color.
|
|
|
|
Parameters
|
|
----------
|
|
ec : color
|
|
"""
|
|
if ec is None:
|
|
ec = 'auto'
|
|
if (self._markeredgecolor is None
|
|
or np.any(self._markeredgecolor != ec)):
|
|
self.stale = True
|
|
self._markeredgecolor = ec
|
|
|
|
def set_markeredgewidth(self, ew):
|
|
"""
|
|
Set the marker edge width in points.
|
|
|
|
Parameters
|
|
----------
|
|
ew : float
|
|
Marker edge width, in points.
|
|
"""
|
|
if ew is None:
|
|
ew = rcParams['lines.markeredgewidth']
|
|
if self._markeredgewidth != ew:
|
|
self.stale = True
|
|
self._markeredgewidth = ew
|
|
|
|
def set_markerfacecolor(self, fc):
|
|
"""
|
|
Set the marker face color.
|
|
|
|
Parameters
|
|
----------
|
|
fc : color
|
|
"""
|
|
if fc is None:
|
|
fc = 'auto'
|
|
if np.any(self._markerfacecolor != fc):
|
|
self.stale = True
|
|
self._markerfacecolor = fc
|
|
|
|
def set_markerfacecoloralt(self, fc):
|
|
"""
|
|
Set the alternate marker face color.
|
|
|
|
Parameters
|
|
----------
|
|
fc : color
|
|
"""
|
|
if fc is None:
|
|
fc = 'auto'
|
|
if np.any(self._markerfacecoloralt != fc):
|
|
self.stale = True
|
|
self._markerfacecoloralt = fc
|
|
|
|
def set_markersize(self, sz):
|
|
"""
|
|
Set the marker size in points.
|
|
|
|
Parameters
|
|
----------
|
|
sz : float
|
|
Marker size, in points.
|
|
"""
|
|
sz = float(sz)
|
|
if self._markersize != sz:
|
|
self.stale = True
|
|
self._markersize = sz
|
|
|
|
def set_xdata(self, x):
|
|
"""
|
|
Set the data array for x.
|
|
|
|
Parameters
|
|
----------
|
|
x : 1D array
|
|
"""
|
|
self._xorig = x
|
|
self._invalidx = True
|
|
self.stale = True
|
|
|
|
def set_ydata(self, y):
|
|
"""
|
|
Set the data array for y.
|
|
|
|
Parameters
|
|
----------
|
|
y : 1D array
|
|
"""
|
|
self._yorig = y
|
|
self._invalidy = True
|
|
self.stale = True
|
|
|
|
def set_dashes(self, seq):
|
|
"""
|
|
Set the dash sequence.
|
|
|
|
The dash sequence is a sequence of floats of even length describing
|
|
the length of dashes and spaces in points.
|
|
|
|
For example, (5, 2, 1, 2) describes a sequence of 5 point and 1 point
|
|
dashes separated by 2 point spaces.
|
|
|
|
Parameters
|
|
----------
|
|
seq : sequence of floats (on/off ink in points) or (None, None)
|
|
If *seq* is empty or ``(None, None)``, the linestyle will be set
|
|
to solid.
|
|
"""
|
|
if seq == (None, None) or len(seq) == 0:
|
|
self.set_linestyle('-')
|
|
else:
|
|
self.set_linestyle((0, seq))
|
|
|
|
def update_from(self, other):
|
|
"""Copy properties from *other* to self."""
|
|
Artist.update_from(self, other)
|
|
self._linestyle = other._linestyle
|
|
self._linewidth = other._linewidth
|
|
self._color = other._color
|
|
self._markersize = other._markersize
|
|
self._markerfacecolor = other._markerfacecolor
|
|
self._markerfacecoloralt = other._markerfacecoloralt
|
|
self._markeredgecolor = other._markeredgecolor
|
|
self._markeredgewidth = other._markeredgewidth
|
|
self._dashSeq = other._dashSeq
|
|
self._us_dashSeq = other._us_dashSeq
|
|
self._dashOffset = other._dashOffset
|
|
self._us_dashOffset = other._us_dashOffset
|
|
self._dashcapstyle = other._dashcapstyle
|
|
self._dashjoinstyle = other._dashjoinstyle
|
|
self._solidcapstyle = other._solidcapstyle
|
|
self._solidjoinstyle = other._solidjoinstyle
|
|
|
|
self._linestyle = other._linestyle
|
|
self._marker = MarkerStyle(other._marker.get_marker(),
|
|
other._marker.get_fillstyle())
|
|
self._drawstyle = other._drawstyle
|
|
|
|
def set_dash_joinstyle(self, s):
|
|
"""
|
|
Set the join style for dashed lines.
|
|
|
|
Parameters
|
|
----------
|
|
s : {'miter', 'round', 'bevel'}
|
|
For examples see :doc:`/gallery/lines_bars_and_markers/joinstyle`.
|
|
"""
|
|
mpl.rcsetup.validate_joinstyle(s)
|
|
if self._dashjoinstyle != s:
|
|
self.stale = True
|
|
self._dashjoinstyle = s
|
|
|
|
def set_solid_joinstyle(self, s):
|
|
"""
|
|
Set the join style for solid lines.
|
|
|
|
Parameters
|
|
----------
|
|
s : {'miter', 'round', 'bevel'}
|
|
For examples see :doc:`/gallery/lines_bars_and_markers/joinstyle`.
|
|
"""
|
|
mpl.rcsetup.validate_joinstyle(s)
|
|
if self._solidjoinstyle != s:
|
|
self.stale = True
|
|
self._solidjoinstyle = s
|
|
|
|
def get_dash_joinstyle(self):
|
|
"""
|
|
Return the join style for dashed lines.
|
|
|
|
See also `~.Line2D.set_dash_joinstyle`.
|
|
"""
|
|
return self._dashjoinstyle
|
|
|
|
def get_solid_joinstyle(self):
|
|
"""
|
|
Return the join style for solid lines.
|
|
|
|
See also `~.Line2D.set_solid_joinstyle`.
|
|
"""
|
|
return self._solidjoinstyle
|
|
|
|
def set_dash_capstyle(self, s):
|
|
"""
|
|
Set the cap style for dashed lines.
|
|
|
|
Parameters
|
|
----------
|
|
s : {'butt', 'round', 'projecting'}
|
|
For examples see :doc:`/gallery/lines_bars_and_markers/joinstyle`.
|
|
"""
|
|
mpl.rcsetup.validate_capstyle(s)
|
|
if self._dashcapstyle != s:
|
|
self.stale = True
|
|
self._dashcapstyle = s
|
|
|
|
def set_solid_capstyle(self, s):
|
|
"""
|
|
Set the cap style for solid lines.
|
|
|
|
Parameters
|
|
----------
|
|
s : {'butt', 'round', 'projecting'}
|
|
For examples see :doc:`/gallery/lines_bars_and_markers/joinstyle`.
|
|
"""
|
|
mpl.rcsetup.validate_capstyle(s)
|
|
if self._solidcapstyle != s:
|
|
self.stale = True
|
|
self._solidcapstyle = s
|
|
|
|
def get_dash_capstyle(self):
|
|
"""
|
|
Return the cap style for dashed lines.
|
|
|
|
See also `~.Line2D.set_dash_capstyle`.
|
|
"""
|
|
return self._dashcapstyle
|
|
|
|
def get_solid_capstyle(self):
|
|
"""
|
|
Return the cap style for solid lines.
|
|
|
|
See also `~.Line2D.set_solid_capstyle`.
|
|
"""
|
|
return self._solidcapstyle
|
|
|
|
def is_dashed(self):
|
|
"""
|
|
Return whether line has a dashed linestyle.
|
|
|
|
See also `~.Line2D.set_linestyle`.
|
|
"""
|
|
return self._linestyle in ('--', '-.', ':')
|
|
|
|
|
|
class _AxLine(Line2D):
|
|
"""
|
|
A helper class that implements `~.Axes.axline`, by recomputing the artist
|
|
transform at draw time.
|
|
"""
|
|
|
|
def get_transform(self):
|
|
ax = self.axes
|
|
(x1, y1), (x2, y2) = ax.transScale.transform([*zip(*self.get_data())])
|
|
dx = x2 - x1
|
|
dy = y2 - y1
|
|
if np.allclose(x1, x2):
|
|
if np.allclose(y1, y2):
|
|
raise ValueError(
|
|
f"Cannot draw a line through two identical points "
|
|
f"(x={self.get_xdata()}, y={self.get_ydata()})")
|
|
# First send y1 to 0 and y2 to 1.
|
|
return (Affine2D.from_values(1, 0, 0, 1 / dy, 0, -y1 / dy)
|
|
+ ax.get_xaxis_transform(which="grid"))
|
|
if np.allclose(y1, y2):
|
|
# First send x1 to 0 and x2 to 1.
|
|
return (Affine2D.from_values(1 / dx, 0, 0, 1, -x1 / dx, 0)
|
|
+ ax.get_yaxis_transform(which="grid"))
|
|
(vxlo, vylo), (vxhi, vyhi) = ax.transScale.transform(ax.viewLim)
|
|
# General case: find intersections with view limits in either
|
|
# direction, and draw between the middle two points.
|
|
_, start, stop, _ = sorted([
|
|
(vxlo, y1 + (vxlo - x1) * dy / dx),
|
|
(vxhi, y1 + (vxhi - x1) * dy / dx),
|
|
(x1 + (vylo - y1) * dx / dy, vylo),
|
|
(x1 + (vyhi - y1) * dx / dy, vyhi),
|
|
])
|
|
return (BboxTransformFrom(Bbox([*zip(*self.get_data())]))
|
|
+ BboxTransformTo(Bbox([start, stop]))
|
|
+ ax.transLimits + ax.transAxes)
|
|
|
|
def draw(self, renderer):
|
|
self._transformed_path = None # Force regen.
|
|
super().draw(renderer)
|
|
|
|
|
|
class VertexSelector:
|
|
"""
|
|
Manage the callbacks to maintain a list of selected vertices for
|
|
`.Line2D`. Derived classes should override
|
|
:meth:`~matplotlib.lines.VertexSelector.process_selected` to do
|
|
something with the picks.
|
|
|
|
Here is an example which highlights the selected verts with red
|
|
circles::
|
|
|
|
import numpy as np
|
|
import matplotlib.pyplot as plt
|
|
import matplotlib.lines as lines
|
|
|
|
class HighlightSelected(lines.VertexSelector):
|
|
def __init__(self, line, fmt='ro', **kwargs):
|
|
lines.VertexSelector.__init__(self, line)
|
|
self.markers, = self.axes.plot([], [], fmt, **kwargs)
|
|
|
|
def process_selected(self, ind, xs, ys):
|
|
self.markers.set_data(xs, ys)
|
|
self.canvas.draw()
|
|
|
|
fig, ax = plt.subplots()
|
|
x, y = np.random.rand(2, 30)
|
|
line, = ax.plot(x, y, 'bs-', picker=5)
|
|
|
|
selector = HighlightSelected(line)
|
|
plt.show()
|
|
|
|
"""
|
|
def __init__(self, line):
|
|
"""
|
|
Initialize the class with a `.Line2D` instance. The line should
|
|
already be added to some :class:`matplotlib.axes.Axes` instance and
|
|
should have the picker property set.
|
|
"""
|
|
if line.axes is None:
|
|
raise RuntimeError('You must first add the line to the Axes')
|
|
|
|
if line.get_picker() is None:
|
|
raise RuntimeError('You must first set the picker property '
|
|
'of the line')
|
|
|
|
self.axes = line.axes
|
|
self.line = line
|
|
self.canvas = self.axes.figure.canvas
|
|
self.cid = self.canvas.mpl_connect('pick_event', self.onpick)
|
|
|
|
self.ind = set()
|
|
|
|
def process_selected(self, ind, xs, ys):
|
|
"""
|
|
Default "do nothing" implementation of the
|
|
:meth:`process_selected` method.
|
|
|
|
Parameters
|
|
----------
|
|
ind : list of int
|
|
The indices of the selected vertices.
|
|
xs, ys : array-like
|
|
The coordinates of the selected vertices.
|
|
"""
|
|
pass
|
|
|
|
def onpick(self, event):
|
|
"""When the line is picked, update the set of selected indices."""
|
|
if event.artist is not self.line:
|
|
return
|
|
self.ind ^= set(event.ind)
|
|
ind = sorted(self.ind)
|
|
xdata, ydata = self.line.get_data()
|
|
self.process_selected(ind, xdata[ind], ydata[ind])
|
|
|
|
|
|
lineStyles = Line2D._lineStyles
|
|
lineMarkers = MarkerStyle.markers
|
|
drawStyles = Line2D.drawStyles
|
|
fillStyles = MarkerStyle.fillstyles
|
|
|
|
docstring.interpd.update(_Line2D_docstr=artist.kwdoc(Line2D))
|
|
|
|
# You can not set the docstring of an instancemethod,
|
|
# but you can on the underlying function. Go figure.
|
|
docstring.dedent_interpd(Line2D.__init__)
|