/
lines.py
1254 lines (1029 loc) · 39.7 KB
/
lines.py
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"""
This module contains all the 2D line class which can draw with a
variety of line styles, markers and colors.
"""
# TODO: expose cap and join style attrs
from __future__ import division, print_function
import warnings
import numpy as np
from numpy import ma
from matplotlib import verbose
import artist
from artist import Artist
from cbook import iterable, is_string_like, is_numlike, ls_mapper
from colors import colorConverter
from path import Path
from transforms import Bbox, TransformedPath, IdentityTransform
from matplotlib import rcParams
from artist import allow_rasterization
from matplotlib import docstring
from matplotlib.markers import MarkerStyle
# Imported here for backward compatibility, even though they don't
# really belong.
from matplotlib.markers import TICKLEFT, TICKRIGHT, TICKUP, TICKDOWN
from matplotlib.markers import CARETLEFT, CARETRIGHT, CARETUP, CARETDOWN
def segment_hits(cx, cy, x, y, radius):
"""
Determine if any line segments are within radius of a
point. Returns the list of line segments that are within that
radius.
"""
# Process single points specially
if len(x) < 2:
res, = np.nonzero((cx - x) ** 2 + (cy - y) ** 2 <= radius ** 2)
return res
# We need to lop the last element off a lot.
xr, yr = x[:-1], y[:-1]
# Only look at line segments whose nearest point to C on the line
# lies within the segment.
dx, dy = x[1:] - xr, y[1:] - yr
Lnorm_sq = dx ** 2 + dy ** 2 # Possibly want to eliminate Lnorm==0
u = ((cx - xr) * dx + (cy - yr) * dy) / Lnorm_sq
candidates = (u >= 0) & (u <= 1)
#if any(candidates): print "candidates",xr[candidates]
# Note that there is a little area near one side of each point
# which will be near neither segment, and another which will
# be near both, depending on the angle of the lines. The
# following radius test eliminates these ambiguities.
point_hits = (cx - x) ** 2 + (cy - y) ** 2 <= radius ** 2
#if any(point_hits): print "points",xr[candidates]
candidates = candidates & ~(point_hits[:-1] | point_hits[1:])
# For those candidates which remain, determine how far they lie away
# from the line.
px, py = xr + u * dx, yr + u * dy
line_hits = (cx - px) ** 2 + (cy - py) ** 2 <= radius ** 2
#if any(line_hits): print "lines",xr[candidates]
line_hits = line_hits & candidates
points, = point_hits.ravel().nonzero()
lines, = line_hits.ravel().nonzero()
#print points,lines
return np.concatenate((points, lines))
class Line2D(Artist):
"""
A line - the line can have both a solid linestyle connecting all
the vertices, and a marker at each vertex. Additionally, the
drawing of the solid line is influenced by the drawstyle, eg one
can create "stepped" lines in various styles.
"""
lineStyles = _lineStyles = { # hidden names deprecated
'-': '_draw_solid',
'--': '_draw_dashed',
'-.': '_draw_dash_dot',
':': '_draw_dotted',
'None': '_draw_nothing',
' ': '_draw_nothing',
'': '_draw_nothing',
}
_drawStyles_l = {
'default': '_draw_lines',
'steps-mid': '_draw_steps_mid',
'steps-pre': '_draw_steps_pre',
'steps-post': '_draw_steps_post',
}
_drawStyles_s = {
'steps': '_draw_steps_pre',
}
drawStyles = {}
drawStyles.update(_drawStyles_l)
drawStyles.update(_drawStyles_s)
# Need a list ordered with long names first:
drawStyleKeys = _drawStyles_l.keys() + _drawStyles_s.keys()
# Referenced here to maintain API. These are defined in
# MarkerStyle
markers = MarkerStyle.markers
filled_markers = MarkerStyle.filled_markers
fillStyles = MarkerStyle.fillstyles
zorder = 2
validCap = ('butt', 'round', 'projecting')
validJoin = ('miter', 'round', 'bevel')
def __str__(self):
if self._label != "":
return "Line2D(%s)" % (self._label)
elif hasattr(self, '_x') and len(self._x) > 3:
return "Line2D((%g,%g),(%g,%g),...,(%g,%g))"\
% (self._x[0], self._y[0], self._x[0],
self._y[0], self._x[-1], self._y[-1])
elif hasattr(self, '_x'):
return "Line2D(%s)"\
% (",".join(["(%g,%g)" % (x, y) for x, y
in zip(self._x, self._y)]))
else:
return "Line2D()"
def __init__(self, xdata, ydata,
linewidth=None, # all Nones default to rc
linestyle=None,
color=None,
marker=None,
markersize=None,
markeredgewidth=None,
markeredgecolor=None,
markerfacecolor=None,
markerfacecoloralt='none',
fillstyle='full',
antialiased=None,
dash_capstyle=None,
solid_capstyle=None,
dash_joinstyle=None,
solid_joinstyle=None,
pickradius=5,
drawstyle=None,
markevery=None,
**kwargs
):
"""
Create a :class:`~matplotlib.lines.Line2D` instance with *x*
and *y* data in sequences *xdata*, *ydata*.
The kwargs are :class:`~matplotlib.lines.Line2D` properties:
%(Line2D)s
See :meth:`set_linestyle` for a decription of the line styles,
:meth:`set_marker` for a description of the markers, and
:meth:`set_drawstyle` for a description of the draw styles.
"""
Artist.__init__(self)
#convert sequences to numpy arrays
if not iterable(xdata):
raise RuntimeError('xdata must be a sequence')
if not iterable(ydata):
raise RuntimeError('ydata must be a sequence')
if linewidth is None:
linewidth = rcParams['lines.linewidth']
if linestyle is None:
linestyle = rcParams['lines.linestyle']
if marker is None:
marker = rcParams['lines.marker']
if color is None:
color = rcParams['lines.color']
if markersize is None:
markersize = rcParams['lines.markersize']
if antialiased is None:
antialiased = rcParams['lines.antialiased']
if dash_capstyle is None:
dash_capstyle = rcParams['lines.dash_capstyle']
if dash_joinstyle is None:
dash_joinstyle = rcParams['lines.dash_joinstyle']
if solid_capstyle is None:
solid_capstyle = rcParams['lines.solid_capstyle']
if solid_joinstyle is None:
solid_joinstyle = rcParams['lines.solid_joinstyle']
if drawstyle is None:
drawstyle = 'default'
self.set_dash_capstyle(dash_capstyle)
self.set_dash_joinstyle(dash_joinstyle)
self.set_solid_capstyle(solid_capstyle)
self.set_solid_joinstyle(solid_joinstyle)
self.set_linestyle(linestyle)
self.set_drawstyle(drawstyle)
self.set_linewidth(linewidth)
self.set_color(color)
self._marker = MarkerStyle()
self.set_marker(marker)
self.set_markevery(markevery)
self.set_antialiased(antialiased)
self.set_markersize(markersize)
self._dashSeq = None
self.set_markerfacecolor(markerfacecolor)
self.set_markerfacecoloralt(markerfacecoloralt)
self.set_markeredgecolor(markeredgecolor)
self.set_markeredgewidth(markeredgewidth)
self.set_fillstyle(fillstyle)
self.verticalOffset = None
# update kwargs before updating data to give the caller a
# chance to init axes (and hence unit support)
self.update(kwargs)
self.pickradius = pickradius
self.ind_offset = 0
if is_numlike(self._picker):
self.pickradius = self._picker
self._xorig = np.asarray([])
self._yorig = np.asarray([])
self._invalidx = True
self._invalidy = True
self.set_data(xdata, ydata)
def contains(self, mouseevent):
"""
Test whether the mouse event occurred on the line. The pick
radius determines the precision of the location test (usually
within five points of the value). Use
:meth:`~matplotlib.lines.Line2D.get_pickradius` or
:meth:`~matplotlib.lines.Line2D.set_pickradius` to view or
modify it.
Returns *True* if any values are within the radius along with
``{'ind': pointlist}``, where *pointlist* is the set of points
within the radius.
TODO: sort returned indices by distance
"""
if callable(self._contains):
return self._contains(self, mouseevent)
if not is_numlike(self.pickradius):
raise ValueError("pick radius should be a distance")
# Make sure we have data to plot
if self._invalidy or self._invalidx:
self.recache()
if len(self._xy) == 0:
return False, {}
# Convert points to pixels
transformed_path = self._get_transformed_path()
path, affine = transformed_path.get_transformed_path_and_affine()
path = affine.transform_path(path)
xy = path.vertices
xt = xy[:, 0]
yt = xy[:, 1]
# Convert pick radius from points to pixels
if self.figure is None:
warnings.warn('no figure set when check if mouse is on line')
pixels = self.pickradius
else:
pixels = self.figure.dpi / 72. * self.pickradius
# the math involved in checking for containment (here and inside of
# segment_hits) assumes that it is OK to overflow. In case the
# application has set the error flags such that an exception is raised
# on overflow, we temporarily set the appropriate error flags here and
# set them back when we are finished.
olderrflags = np.seterr(all='ignore')
try:
# Check for collision
if self._linestyle in ['None', None]:
# If no line, return the nearby point(s)
d = (xt - mouseevent.x) ** 2 + (yt - mouseevent.y) ** 2
ind, = np.nonzero(np.less_equal(d, pixels ** 2))
else:
# If line, return the nearby segment(s)
ind = segment_hits(mouseevent.x, mouseevent.y, xt, yt, pixels)
finally:
np.seterr(**olderrflags)
ind += self.ind_offset
# Debugging message
if False and self._label != '':
print("Checking line", self._label,
"at", mouseevent.x, mouseevent.y)
print('xt', xt)
print('yt', yt)
#print 'dx,dy', (xt-mouseevent.x)**2., (yt-mouseevent.y)**2.
print('ind', ind)
# Return the point(s) within radius
return len(ind) > 0, dict(ind=ind)
def get_pickradius(self):
"""return the pick radius used for containment tests"""
return self.pickradius
def set_pickradius(self, d):
"""Sets the pick radius used for containment tests
ACCEPTS: float distance in points
"""
self.pickradius = d
def get_fillstyle(self):
"""
return the marker fillstyle
"""
return self._marker.get_fillstyle()
def set_fillstyle(self, fs):
"""
Set the marker fill style; 'full' means fill the whole marker.
'none' means no filling; other options are for half-filled markers.
ACCEPTS: ['full' | 'left' | 'right' | 'bottom' | 'top' | 'none']
"""
self._marker.set_fillstyle(fs)
def set_markevery(self, every):
"""
Set the markevery property to subsample the plot when using
markers. Eg if ``markevery=5``, every 5-th marker will be
plotted. *every* can be
None
Every point will be plotted
an integer N
Every N-th marker will be plotted starting with marker 0
A length-2 tuple of integers
every=(start, N) will start at point start and plot every N-th
marker
ACCEPTS: None | integer | (startind, stride)
"""
self._markevery = every
def get_markevery(self):
"""return the markevery setting"""
return self._markevery
def set_picker(self, p):
"""Sets the event picker details for the line.
ACCEPTS: float distance in points or callable pick function
``fn(artist, event)``
"""
if callable(p):
self._contains = p
else:
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
def set_axes(self, ax):
Artist.set_axes(self, ax)
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)
set_axes.__doc__ = Artist.set_axes.__doc__
def set_data(self, *args):
"""
Set the x and y data
ACCEPTS: 2D array (rows are x, y) or two 1D arrays
"""
if len(args) == 1:
x, y = args[0]
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)
if ma.isMaskedArray(self._xorig):
x = ma.asarray(xconv, np.float_)
else:
x = np.asarray(xconv, np.float_)
x = x.ravel()
else:
x = self._x
if always or self._invalidy:
yconv = self.convert_yunits(self._yorig)
if ma.isMaskedArray(self._yorig):
y = ma.asarray(yconv, np.float_)
else:
y = np.asarray(yconv, np.float_)
y = y.ravel()
else:
y = self._y
if len(x) == 1 and len(y) > 1:
x = x * np.ones(y.shape, np.float_)
if len(y) == 1 and len(x) > 1:
y = y * np.ones(x.shape, np.float_)
if len(x) != len(y):
raise RuntimeError('xdata and ydata must be the same length')
x = x.reshape((len(x), 1))
y = y.reshape((len(y), 1))
if ma.isMaskedArray(x) or ma.isMaskedArray(y):
self._xy = ma.concatenate((x, y), 1)
else:
self._xy = np.concatenate((x, y), 1)
self._x = self._xy[:, 0] # just a view
self._y = self._xy[:, 1] # just a view
self._subslice = False
if (self.axes and len(x) > 100 and self._is_sorted(x) and
self.axes.name == 'rectilinear' and
self.axes.get_xscale() == 'linear' and
self._markevery is None):
self._subslice = True
if hasattr(self, '_path'):
interpolation_steps = self._path._interpolation_steps
else:
interpolation_steps = 1
self._path = Path(self._xy, None, 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:
_path = Path(self._xy[subslice, :])
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
ACCEPTS: a :class:`matplotlib.transforms.Transform` instance
"""
Artist.set_transform(self, t)
self._invalidx = True
self._invalidy = True
def _is_sorted(self, x):
"""return true if x is sorted"""
if len(x) < 2:
return 1
return np.alltrue(x[1:] - x[0:-1] >= 0)
@allow_rasterization
def draw(self, renderer):
"""draw the Line with `renderer` unless visiblity is False"""
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:
# Need to handle monotonically decreasing case also...
x0, x1 = self.axes.get_xbound()
i0, = self._x.searchsorted([x0], 'left')
i1, = self._x.searchsorted([x1], 'right')
subslice = slice(max(i0 - 1, 0), i1 + 1)
self.ind_offset = subslice.start
self._transform_path(subslice)
transf_path = self._get_transformed_path()
renderer.open_group('line2d', self.get_gid())
gc = renderer.new_gc()
self._set_gc_clip(gc)
ln_color_rgba = self._get_rgba_ln_color()
gc.set_foreground(ln_color_rgba)
gc.set_alpha(ln_color_rgba[3])
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())
funcname = self._lineStyles.get(self._linestyle, '_draw_nothing')
if funcname != '_draw_nothing':
tpath, affine = transf_path.get_transformed_path_and_affine()
if len(tpath.vertices):
self._lineFunc = getattr(self, funcname)
funcname = self.drawStyles.get(self._drawstyle, '_draw_lines')
drawFunc = getattr(self, funcname)
drawFunc(renderer, gc, tpath, affine.frozen())
if self._marker:
gc = renderer.new_gc()
self._set_gc_clip(gc)
rgbaFace = self._get_rgba_face()
rgbaFaceAlt = self._get_rgba_face(alt=True)
edgecolor = self.get_markeredgecolor()
if is_string_like(edgecolor) and edgecolor.lower() == 'none':
gc.set_linewidth(0)
gc.set_foreground(rgbaFace)
else:
gc.set_foreground(edgecolor)
gc.set_linewidth(self._markeredgewidth)
marker = self._marker
tpath, affine = transf_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:
if iterable(markevery):
startind, stride = markevery
else:
startind, stride = 0, markevery
if tpath.codes is not None:
codes = tpath.codes[startind::stride]
else:
codes = None
vertices = tpath.vertices[startind::stride]
subsampled = Path(vertices, codes)
else:
subsampled = tpath
snap = marker.get_snap_threshold()
if type(snap) == float:
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 marker.get_marker() != ',':
# Don't scale for pixels, and don't stroke them
marker_trans = marker_trans.scale(w)
else:
gc.set_linewidth(0)
if rgbaFace is not None:
gc.set_alpha(rgbaFace[3])
renderer.draw_markers(
gc, marker_path, marker_trans, subsampled, affine.frozen(),
rgbaFace)
alt_marker_path = marker.get_alt_path()
if alt_marker_path:
if rgbaFaceAlt is not None:
gc.set_alpha(rgbaFaceAlt[3])
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(), rgbaFaceAlt)
gc.restore()
gc.restore()
renderer.close_group('line2d')
def get_antialiased(self):
return self._antialiased
def get_color(self):
return self._color
def get_drawstyle(self):
return self._drawstyle
def get_linestyle(self):
return self._linestyle
def get_linewidth(self):
return self._linewidth
def get_marker(self):
return self._marker.get_marker()
def get_markeredgecolor(self):
mec = self._markeredgecolor
if (is_string_like(mec) and mec == 'auto'):
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...
else:
return self._color
else:
return mec
def get_markeredgewidth(self):
return self._markeredgewidth
def _get_markerfacecolor(self, alt=False):
if alt:
fc = self._markerfacecoloralt
else:
fc = self._markerfacecolor
if (is_string_like(fc) and fc.lower() == 'auto'):
if self.get_fillstyle() == 'none':
return 'none'
else:
return self._color
else:
return fc
def get_markerfacecolor(self):
return self._get_markerfacecolor(alt=False)
def get_markerfacecoloralt(self):
return self._get_markerfacecolor(alt=True)
def get_markersize(self):
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):
"""
True if line should be drawin with antialiased rendering
ACCEPTS: [True | False]
"""
self._antialiased = b
def set_color(self, color):
"""
Set the color of the line
ACCEPTS: any matplotlib color
"""
self._color = color
def set_drawstyle(self, drawstyle):
"""
Set the drawstyle of the plot
'default' connects the points with lines. The steps variants
produce step-plots. 'steps' is equivalent to 'steps-pre' and
is maintained for backward-compatibility.
ACCEPTS: ['default' | 'steps' | 'steps-pre' | 'steps-mid' |
'steps-post']
"""
self._drawstyle = drawstyle
def set_linewidth(self, w):
"""
Set the line width in points
ACCEPTS: float value in points
"""
self._linewidth = w
def set_linestyle(self, linestyle):
"""
Set the linestyle of the line (also accepts drawstyles)
================ =================
linestyle description
================ =================
``'-'`` solid
``'--'`` dashed
``'-.'`` dash_dot
``':'`` dotted
``'None'`` draw nothing
``' '`` draw nothing
``''`` draw nothing
================ =================
'steps' is equivalent to 'steps-pre' and is maintained for
backward-compatibility.
.. seealso::
:meth:`set_drawstyle`
To set the drawing style (stepping) of the plot.
ACCEPTS: [``'-'`` | ``'--'`` | ``'-.'`` | ``':'`` | ``'None'`` |
``' '`` | ``''``]
and any drawstyle in combination with a linestyle, e.g. ``'steps--'``.
"""
for ds in self.drawStyleKeys: # long names are first in the list
if linestyle.startswith(ds):
self.set_drawstyle(ds)
if len(linestyle) > len(ds):
linestyle = linestyle[len(ds):]
else:
linestyle = '-'
break
if linestyle not in self._lineStyles:
if linestyle in ls_mapper:
linestyle = ls_mapper[linestyle]
else:
verbose.report('Unrecognized line style %s, %s' %
(linestyle, type(linestyle)))
if linestyle in [' ', '']:
linestyle = 'None'
self._linestyle = linestyle
@docstring.dedent_interpd
def set_marker(self, marker):
"""
Set the line marker
Parameters
-----------
marker: marker style
See `~matplotlib.markers` for full description of possible
argument
"""
self._marker.set_marker(marker)
def set_markeredgecolor(self, ec):
"""
Set the marker edge color
ACCEPTS: any matplotlib color
"""
if ec is None:
ec = 'auto'
self._markeredgecolor = ec
def set_markeredgewidth(self, ew):
"""
Set the marker edge width in points
ACCEPTS: float value in points
"""
if ew is None:
ew = rcParams['lines.markeredgewidth']
self._markeredgewidth = ew
def set_markerfacecolor(self, fc):
"""
Set the marker face color.
ACCEPTS: any matplotlib color
"""
if fc is None:
fc = 'auto'
self._markerfacecolor = fc
def set_markerfacecoloralt(self, fc):
"""
Set the alternate marker face color.
ACCEPTS: any matplotlib color
"""
if fc is None:
fc = 'auto'
self._markerfacecoloralt = fc
def set_markersize(self, sz):
"""
Set the marker size in points
ACCEPTS: float
"""
self._markersize = sz
def set_xdata(self, x):
"""
Set the data np.array for x
ACCEPTS: 1D array
"""
self._xorig = x
self._invalidx = True
def set_ydata(self, y):
"""
Set the data np.array for y
ACCEPTS: 1D array
"""
self._yorig = y
self._invalidy = True
def set_dashes(self, seq):
"""
Set the dash sequence, sequence of dashes with on off ink in
points. If seq is empty or if seq = (None, None), the
linestyle will be set to solid.
ACCEPTS: sequence of on/off ink in points
"""
if seq == (None, None) or len(seq) == 0:
self.set_linestyle('-')
else:
self.set_linestyle('--')
self._dashSeq = seq # TODO: offset ignored for now
def _draw_lines(self, renderer, gc, path, trans):
self._lineFunc(renderer, gc, path, trans)
def _draw_steps_pre(self, renderer, gc, path, trans):
vertices = self._xy
steps = ma.zeros((2 * len(vertices) - 1, 2), np.float_)
steps[0::2, 0], steps[1::2, 0] = vertices[:, 0], vertices[:-1, 0]
steps[0::2, 1], steps[1:-1:2, 1] = vertices[:, 1], vertices[1:, 1]
path = Path(steps)
path = path.transformed(self.get_transform())
self._lineFunc(renderer, gc, path, IdentityTransform())
def _draw_steps_post(self, renderer, gc, path, trans):
vertices = self._xy
steps = ma.zeros((2 * len(vertices) - 1, 2), np.float_)
steps[::2, 0], steps[1:-1:2, 0] = vertices[:, 0], vertices[1:, 0]
steps[0::2, 1], steps[1::2, 1] = vertices[:, 1], vertices[:-1, 1]
path = Path(steps)
path = path.transformed(self.get_transform())
self._lineFunc(renderer, gc, path, IdentityTransform())
def _draw_steps_mid(self, renderer, gc, path, trans):
vertices = self._xy
steps = ma.zeros((2 * len(vertices), 2), np.float_)
steps[1:-1:2, 0] = 0.5 * (vertices[:-1, 0] + vertices[1:, 0])
steps[2::2, 0] = 0.5 * (vertices[:-1, 0] + vertices[1:, 0])
steps[0, 0] = vertices[0, 0]
steps[-1, 0] = vertices[-1, 0]
steps[0::2, 1], steps[1::2, 1] = vertices[:, 1], vertices[:, 1]
path = Path(steps)
path = path.transformed(self.get_transform())
self._lineFunc(renderer, gc, path, IdentityTransform())
def _draw_solid(self, renderer, gc, path, trans):
gc.set_linestyle('solid')
renderer.draw_path(gc, path, trans)
def _draw_dashed(self, renderer, gc, path, trans):
gc.set_linestyle('dashed')
if self._dashSeq is not None:
gc.set_dashes(0, self._dashSeq)
renderer.draw_path(gc, path, trans)
def _draw_dash_dot(self, renderer, gc, path, trans):
gc.set_linestyle('dashdot')
renderer.draw_path(gc, path, trans)
def _draw_dotted(self, renderer, gc, path, trans):
gc.set_linestyle('dotted')
renderer.draw_path(gc, path, trans)
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._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 _get_rgb_face(self, alt=False):
facecolor = self._get_markerfacecolor(alt=alt)
if is_string_like(facecolor) and facecolor.lower() == 'none':
rgbFace = None
else:
rgbFace = colorConverter.to_rgb(facecolor)
return rgbFace
def _get_rgba_face(self, alt=False):
facecolor = self._get_markerfacecolor(alt=alt)