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Small cleanups to QuiverKey. #23119

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Merged
merged 1 commit into from
Nov 1, 2022
Merged

Small cleanups to QuiverKey. #23119

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33 changes: 11 additions & 22 deletions lib/matplotlib/quiver.py
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Original file line number Diff line number Diff line change
Expand Up @@ -19,7 +19,7 @@
import numpy as np
from numpy import ma

from matplotlib import _api, cbook, _docstring, font_manager
from matplotlib import _api, cbook, _docstring
import matplotlib.artist as martist
import matplotlib.collections as mcollections
from matplotlib.patches import CirclePolygon
Expand Down Expand Up @@ -303,13 +303,11 @@ def __init__(self, Q, X, Y, U, label,
self.labelcolor = labelcolor
self.fontproperties = fontproperties or dict()
self.kw = kwargs
_fp = self.fontproperties
self.text = mtext.Text(
text=label,
horizontalalignment=self.halign[self.labelpos],
verticalalignment=self.valign[self.labelpos],
fontproperties=font_manager.FontProperties._from_any(_fp))

fontproperties=self.fontproperties)
if self.labelcolor is not None:
self.text.set_color(self.labelcolor)
self._dpi_at_last_init = None
Expand Down Expand Up @@ -346,29 +344,20 @@ def _init(self):
self.vector.set_figure(self.get_figure())
self._dpi_at_last_init = self.Q.axes.figure.dpi

def _text_x(self, x):
if self.labelpos == 'E':
return x + self.labelsep
elif self.labelpos == 'W':
return x - self.labelsep
else:
return x

def _text_y(self, y):
if self.labelpos == 'N':
return y + self.labelsep
elif self.labelpos == 'S':
return y - self.labelsep
else:
return y
def _text_shift(self):
return {
"N": (0, +self.labelsep),
"S": (0, -self.labelsep),
"E": (+self.labelsep, 0),
"W": (-self.labelsep, 0),
}[self.labelpos]

@martist.allow_rasterization
def draw(self, renderer):
self._init()
self.vector.draw(renderer)
x, y = self.get_transform().transform((self.X, self.Y))
self.text.set_x(self._text_x(x))
self.text.set_y(self._text_y(y))
pos = self.get_transform().transform((self.X, self.Y))
self.text.set_position(pos + self._text_shift())
self.text.draw(renderer)
self.stale = False

Expand Down