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text.py
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2035 lines (1686 loc) · 69.2 KB
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"""
Classes for including text in a figure.
"""
import functools
import logging
import math
from numbers import Real
import weakref
import numpy as np
import matplotlib as mpl
from . import _api, artist, cbook, _docstring
from .artist import Artist
from .font_manager import FontProperties
from .patches import FancyArrowPatch, FancyBboxPatch, Rectangle
from .textpath import TextPath, TextToPath # noqa # Logically located here
from .transforms import (
Affine2D, Bbox, BboxBase, BboxTransformTo, IdentityTransform, Transform)
_log = logging.getLogger(__name__)
def _get_textbox(text, renderer):
"""
Calculate the bounding box of the text.
The bbox position takes text rotation into account, but the width and
height are those of the unrotated box (unlike `.Text.get_window_extent`).
"""
# TODO : This function may move into the Text class as a method. As a
# matter of fact, the information from the _get_textbox function
# should be available during the Text._get_layout() call, which is
# called within the _get_textbox. So, it would better to move this
# function as a method with some refactoring of _get_layout method.
projected_xs = []
projected_ys = []
theta = np.deg2rad(text.get_rotation())
tr = Affine2D().rotate(-theta)
_, parts, d = text._get_layout(renderer)
for t, wh, x, y in parts:
w, h = wh
xt1, yt1 = tr.transform((x, y))
yt1 -= d
xt2, yt2 = xt1 + w, yt1 + h
projected_xs.extend([xt1, xt2])
projected_ys.extend([yt1, yt2])
xt_box, yt_box = min(projected_xs), min(projected_ys)
w_box, h_box = max(projected_xs) - xt_box, max(projected_ys) - yt_box
x_box, y_box = Affine2D().rotate(theta).transform((xt_box, yt_box))
return x_box, y_box, w_box, h_box
def _get_text_metrics_with_cache(renderer, text, fontprop, ismath, dpi):
"""Call ``renderer.get_text_width_height_descent``, caching the results."""
# Cached based on a copy of fontprop so that later in-place mutations of
# the passed-in argument do not mess up the cache.
return _get_text_metrics_with_cache_impl(
weakref.ref(renderer), text, fontprop.copy(), ismath, dpi)
@functools.lru_cache(4096)
def _get_text_metrics_with_cache_impl(
renderer_ref, text, fontprop, ismath, dpi):
# dpi is unused, but participates in cache invalidation (via the renderer).
return renderer_ref().get_text_width_height_descent(text, fontprop, ismath)
@_docstring.interpd
@_api.define_aliases({
"color": ["c"],
"fontproperties": ["font", "font_properties"],
"fontfamily": ["family"],
"fontname": ["name"],
"fontsize": ["size"],
"fontstretch": ["stretch"],
"fontstyle": ["style"],
"fontvariant": ["variant"],
"fontweight": ["weight"],
"horizontalalignment": ["ha"],
"verticalalignment": ["va"],
"multialignment": ["ma"],
})
class Text(Artist):
"""Handle storing and drawing of text in window or data coordinates."""
zorder = 3
_charsize_cache = dict()
def __repr__(self):
return f"Text({self._x}, {self._y}, {self._text!r})"
def __init__(self,
x=0, y=0, text='', *,
color=None, # defaults to rc params
verticalalignment='baseline',
horizontalalignment='left',
multialignment=None,
fontproperties=None, # defaults to FontProperties()
rotation=None,
linespacing=None,
rotation_mode=None,
usetex=None, # defaults to rcParams['text.usetex']
wrap=False,
transform_rotates_text=False,
parse_math=None, # defaults to rcParams['text.parse_math']
antialiased=None, # defaults to rcParams['text.antialiased']
**kwargs
):
"""
Create a `.Text` instance at *x*, *y* with string *text*.
The text is aligned relative to the anchor point (*x*, *y*) according
to ``horizontalalignment`` (default: 'left') and ``verticalalignment``
(default: 'baseline'). See also
:doc:`/gallery/text_labels_and_annotations/text_alignment`.
While Text accepts the 'label' keyword argument, by default it is not
added to the handles of a legend.
Valid keyword arguments are:
%(Text:kwdoc)s
"""
super().__init__()
self._x, self._y = x, y
self._text = ''
self._reset_visual_defaults(
text=text,
color=color,
fontproperties=fontproperties,
usetex=usetex,
parse_math=parse_math,
wrap=wrap,
verticalalignment=verticalalignment,
horizontalalignment=horizontalalignment,
multialignment=multialignment,
rotation=rotation,
transform_rotates_text=transform_rotates_text,
linespacing=linespacing,
rotation_mode=rotation_mode,
antialiased=antialiased
)
self.update(kwargs)
def _reset_visual_defaults(
self,
text='',
color=None,
fontproperties=None,
usetex=None,
parse_math=None,
wrap=False,
verticalalignment='baseline',
horizontalalignment='left',
multialignment=None,
rotation=None,
transform_rotates_text=False,
linespacing=None,
rotation_mode=None,
antialiased=None
):
self.set_text(text)
self.set_color(mpl._val_or_rc(color, "text.color"))
self.set_fontproperties(fontproperties)
self.set_usetex(usetex)
self.set_parse_math(mpl._val_or_rc(parse_math, 'text.parse_math'))
self.set_wrap(wrap)
self.set_verticalalignment(verticalalignment)
self.set_horizontalalignment(horizontalalignment)
self._multialignment = multialignment
self.set_rotation(rotation)
self._transform_rotates_text = transform_rotates_text
self._bbox_patch = None # a FancyBboxPatch instance
self._renderer = None
if linespacing is None:
linespacing = 1.2 # Maybe use rcParam later.
self.set_linespacing(linespacing)
self.set_rotation_mode(rotation_mode)
self.set_antialiased(antialiased if antialiased is not None else
mpl.rcParams['text.antialiased'])
def update(self, kwargs):
# docstring inherited
ret = []
kwargs = cbook.normalize_kwargs(kwargs, Text)
sentinel = object() # bbox can be None, so use another sentinel.
# Update fontproperties first, as it has lowest priority.
fontproperties = kwargs.pop("fontproperties", sentinel)
if fontproperties is not sentinel:
ret.append(self.set_fontproperties(fontproperties))
# Update bbox last, as it depends on font properties.
bbox = kwargs.pop("bbox", sentinel)
ret.extend(super().update(kwargs))
if bbox is not sentinel:
ret.append(self.set_bbox(bbox))
return ret
def __getstate__(self):
d = super().__getstate__()
# remove the cached _renderer (if it exists)
d['_renderer'] = None
return d
def contains(self, mouseevent):
"""
Return whether the mouse event occurred inside the axis-aligned
bounding-box of the text.
"""
if (self._different_canvas(mouseevent) or not self.get_visible()
or self._renderer is None):
return False, {}
# Explicitly use Text.get_window_extent(self) and not
# self.get_window_extent() so that Annotation.contains does not
# accidentally cover the entire annotation bounding box.
bbox = Text.get_window_extent(self)
inside = (bbox.x0 <= mouseevent.x <= bbox.x1
and bbox.y0 <= mouseevent.y <= bbox.y1)
cattr = {}
# if the text has a surrounding patch, also check containment for it,
# and merge the results with the results for the text.
if self._bbox_patch:
patch_inside, patch_cattr = self._bbox_patch.contains(mouseevent)
inside = inside or patch_inside
cattr["bbox_patch"] = patch_cattr
return inside, cattr
def _get_xy_display(self):
"""
Get the (possibly unit converted) transformed x, y in display coords.
"""
x, y = self.get_unitless_position()
return self.get_transform().transform((x, y))
def _get_multialignment(self):
if self._multialignment is not None:
return self._multialignment
else:
return self._horizontalalignment
def _char_index_at(self, x):
"""
Calculate the index closest to the coordinate x in display space.
The position of text[index] is assumed to be the sum of the widths
of all preceding characters text[:index].
This works only on single line texts.
"""
if not self._text:
return 0
text = self._text
fontproperties = str(self._fontproperties)
if fontproperties not in Text._charsize_cache:
Text._charsize_cache[fontproperties] = dict()
charsize_cache = Text._charsize_cache[fontproperties]
for char in set(text):
if char not in charsize_cache:
self.set_text(char)
bb = self.get_window_extent()
charsize_cache[char] = bb.x1 - bb.x0
self.set_text(text)
bb = self.get_window_extent()
size_accum = np.cumsum([0] + [charsize_cache[x] for x in text])
std_x = x - bb.x0
return (np.abs(size_accum - std_x)).argmin()
def get_rotation(self):
"""Return the text angle in degrees between 0 and 360."""
if self.get_transform_rotates_text():
return self.get_transform().transform_angles(
[self._rotation], [self.get_unitless_position()]).item(0)
else:
return self._rotation
def get_transform_rotates_text(self):
"""
Return whether rotations of the transform affect the text direction.
"""
return self._transform_rotates_text
def set_rotation_mode(self, m):
"""
Set text rotation mode.
Parameters
----------
m : {None, 'default', 'anchor'}
If ``"default"``, the text will be first rotated, then aligned according
to their horizontal and vertical alignments. If ``"anchor"``, then
alignment occurs before rotation. Passing ``None`` will set the rotation
mode to ``"default"``.
"""
if m is None:
m = "default"
else:
_api.check_in_list(("anchor", "default"), rotation_mode=m)
self._rotation_mode = m
self.stale = True
def get_rotation_mode(self):
"""Return the text rotation mode."""
return self._rotation_mode
def set_antialiased(self, antialiased):
"""
Set whether to use antialiased rendering.
Parameters
----------
antialiased : bool
Notes
-----
Antialiasing will be determined by :rc:`text.antialiased`
and the parameter *antialiased* will have no effect if the text contains
math expressions.
"""
self._antialiased = antialiased
self.stale = True
def get_antialiased(self):
"""Return whether antialiased rendering is used."""
return self._antialiased
def update_from(self, other):
# docstring inherited
super().update_from(other)
self._color = other._color
self._multialignment = other._multialignment
self._verticalalignment = other._verticalalignment
self._horizontalalignment = other._horizontalalignment
self._fontproperties = other._fontproperties.copy()
self._usetex = other._usetex
self._rotation = other._rotation
self._transform_rotates_text = other._transform_rotates_text
self._picker = other._picker
self._linespacing = other._linespacing
self._antialiased = other._antialiased
self.stale = True
def _get_layout(self, renderer):
"""
Return the extent (bbox) of the text together with
multiple-alignment information. Note that it returns an extent
of a rotated text when necessary.
"""
thisx, thisy = 0.0, 0.0
lines = self._get_wrapped_text().split("\n") # Ensures lines is not empty.
ws = []
hs = []
xs = []
ys = []
# Full vertical extent of font, including ascenders and descenders:
_, lp_h, lp_d = _get_text_metrics_with_cache(
renderer, "lp", self._fontproperties,
ismath="TeX" if self.get_usetex() else False,
dpi=self.get_figure(root=True).dpi)
min_dy = (lp_h - lp_d) * self._linespacing
for i, line in enumerate(lines):
clean_line, ismath = self._preprocess_math(line)
if clean_line:
w, h, d = _get_text_metrics_with_cache(
renderer, clean_line, self._fontproperties,
ismath=ismath, dpi=self.get_figure(root=True).dpi)
else:
w = h = d = 0
# For multiline text, increase the line spacing when the text
# net-height (excluding baseline) is larger than that of a "l"
# (e.g., use of superscripts), which seems what TeX does.
h = max(h, lp_h)
d = max(d, lp_d)
ws.append(w)
hs.append(h)
# Metrics of the last line that are needed later:
baseline = (h - d) - thisy
if i == 0:
# position at baseline
thisy = -(h - d)
else:
# put baseline a good distance from bottom of previous line
thisy -= max(min_dy, (h - d) * self._linespacing)
xs.append(thisx) # == 0.
ys.append(thisy)
thisy -= d
# Metrics of the last line that are needed later:
descent = d
# Bounding box definition:
width = max(ws)
xmin = 0
xmax = width
ymax = 0
ymin = ys[-1] - descent # baseline of last line minus its descent
# get the rotation matrix
M = Affine2D().rotate_deg(self.get_rotation())
# now offset the individual text lines within the box
malign = self._get_multialignment()
if malign == 'left':
offset_layout = [(x, y) for x, y in zip(xs, ys)]
elif malign == 'center':
offset_layout = [(x + width / 2 - w / 2, y)
for x, y, w in zip(xs, ys, ws)]
elif malign == 'right':
offset_layout = [(x + width - w, y)
for x, y, w in zip(xs, ys, ws)]
# the corners of the unrotated bounding box
corners_horiz = np.array(
[(xmin, ymin), (xmin, ymax), (xmax, ymax), (xmax, ymin)])
# now rotate the bbox
corners_rotated = M.transform(corners_horiz)
# compute the bounds of the rotated box
xmin = corners_rotated[:, 0].min()
xmax = corners_rotated[:, 0].max()
ymin = corners_rotated[:, 1].min()
ymax = corners_rotated[:, 1].max()
width = xmax - xmin
height = ymax - ymin
# Now move the box to the target position offset the display
# bbox by alignment
halign = self._horizontalalignment
valign = self._verticalalignment
rotation_mode = self.get_rotation_mode()
if rotation_mode != "anchor":
# compute the text location in display coords and the offsets
# necessary to align the bbox with that location
if halign == 'center':
offsetx = (xmin + xmax) / 2
elif halign == 'right':
offsetx = xmax
else:
offsetx = xmin
if valign == 'center':
offsety = (ymin + ymax) / 2
elif valign == 'top':
offsety = ymax
elif valign == 'baseline':
offsety = ymin + descent
elif valign == 'center_baseline':
offsety = ymin + height - baseline / 2.0
else:
offsety = ymin
else:
xmin1, ymin1 = corners_horiz[0]
xmax1, ymax1 = corners_horiz[2]
if halign == 'center':
offsetx = (xmin1 + xmax1) / 2.0
elif halign == 'right':
offsetx = xmax1
else:
offsetx = xmin1
if valign == 'center':
offsety = (ymin1 + ymax1) / 2.0
elif valign == 'top':
offsety = ymax1
elif valign == 'baseline':
offsety = ymax1 - baseline
elif valign == 'center_baseline':
offsety = ymax1 - baseline / 2.0
else:
offsety = ymin1
offsetx, offsety = M.transform((offsetx, offsety))
xmin -= offsetx
ymin -= offsety
bbox = Bbox.from_bounds(xmin, ymin, width, height)
# now rotate the positions around the first (x, y) position
xys = M.transform(offset_layout) - (offsetx, offsety)
return bbox, list(zip(lines, zip(ws, hs), *xys.T)), descent
def set_bbox(self, rectprops):
"""
Draw a bounding box around self.
Parameters
----------
rectprops : dict with properties for `.patches.FancyBboxPatch`
The default boxstyle is 'square'. The mutation
scale of the `.patches.FancyBboxPatch` is set to the fontsize.
Examples
--------
::
t.set_bbox(dict(facecolor='red', alpha=0.5))
"""
if rectprops is not None:
props = rectprops.copy()
boxstyle = props.pop("boxstyle", None)
pad = props.pop("pad", None)
if boxstyle is None:
boxstyle = "square"
if pad is None:
pad = 4 # points
pad /= self.get_size() # to fraction of font size
else:
if pad is None:
pad = 0.3
# boxstyle could be a callable or a string
if isinstance(boxstyle, str) and "pad" not in boxstyle:
boxstyle += ",pad=%0.2f" % pad
self._bbox_patch = FancyBboxPatch(
(0, 0), 1, 1,
boxstyle=boxstyle, transform=IdentityTransform(), **props)
else:
self._bbox_patch = None
self._update_clip_properties()
def get_bbox_patch(self):
"""
Return the bbox Patch, or None if the `.patches.FancyBboxPatch`
is not made.
"""
return self._bbox_patch
def update_bbox_position_size(self, renderer):
"""
Update the location and the size of the bbox.
This method should be used when the position and size of the bbox needs
to be updated before actually drawing the bbox.
"""
if self._bbox_patch:
# don't use self.get_unitless_position here, which refers to text
# position in Text:
posx = float(self.convert_xunits(self._x))
posy = float(self.convert_yunits(self._y))
posx, posy = self.get_transform().transform((posx, posy))
x_box, y_box, w_box, h_box = _get_textbox(self, renderer)
self._bbox_patch.set_bounds(0., 0., w_box, h_box)
self._bbox_patch.set_transform(
Affine2D()
.rotate_deg(self.get_rotation())
.translate(posx + x_box, posy + y_box))
fontsize_in_pixel = renderer.points_to_pixels(self.get_size())
self._bbox_patch.set_mutation_scale(fontsize_in_pixel)
def _update_clip_properties(self):
if self._bbox_patch:
clipprops = dict(clip_box=self.clipbox,
clip_path=self._clippath,
clip_on=self._clipon)
self._bbox_patch.update(clipprops)
def set_clip_box(self, clipbox):
# docstring inherited.
super().set_clip_box(clipbox)
self._update_clip_properties()
def set_clip_path(self, path, transform=None):
# docstring inherited.
super().set_clip_path(path, transform)
self._update_clip_properties()
def set_clip_on(self, b):
# docstring inherited.
super().set_clip_on(b)
self._update_clip_properties()
def get_wrap(self):
"""Return whether the text can be wrapped."""
return self._wrap
def set_wrap(self, wrap):
"""
Set whether the text can be wrapped.
Wrapping makes sure the text is confined to the (sub)figure box. It
does not take into account any other artists.
Parameters
----------
wrap : bool
Notes
-----
Wrapping does not work together with
``savefig(..., bbox_inches='tight')`` (which is also used internally
by ``%matplotlib inline`` in IPython/Jupyter). The 'tight' setting
rescales the canvas to accommodate all content and happens before
wrapping.
"""
self._wrap = wrap
def _get_wrap_line_width(self):
"""
Return the maximum line width for wrapping text based on the current
orientation.
"""
x0, y0 = self.get_transform().transform(self.get_position())
figure_box = self.get_figure().get_window_extent()
# Calculate available width based on text alignment
alignment = self.get_horizontalalignment()
self.set_rotation_mode('anchor')
rotation = self.get_rotation()
left = self._get_dist_to_box(rotation, x0, y0, figure_box)
right = self._get_dist_to_box(
(180 + rotation) % 360, x0, y0, figure_box)
if alignment == 'left':
line_width = left
elif alignment == 'right':
line_width = right
else:
line_width = 2 * min(left, right)
return line_width
def _get_dist_to_box(self, rotation, x0, y0, figure_box):
"""
Return the distance from the given points to the boundaries of a
rotated box, in pixels.
"""
if rotation > 270:
quad = rotation - 270
h1 = (y0 - figure_box.y0) / math.cos(math.radians(quad))
h2 = (figure_box.x1 - x0) / math.cos(math.radians(90 - quad))
elif rotation > 180:
quad = rotation - 180
h1 = (x0 - figure_box.x0) / math.cos(math.radians(quad))
h2 = (y0 - figure_box.y0) / math.cos(math.radians(90 - quad))
elif rotation > 90:
quad = rotation - 90
h1 = (figure_box.y1 - y0) / math.cos(math.radians(quad))
h2 = (x0 - figure_box.x0) / math.cos(math.radians(90 - quad))
else:
h1 = (figure_box.x1 - x0) / math.cos(math.radians(rotation))
h2 = (figure_box.y1 - y0) / math.cos(math.radians(90 - rotation))
return min(h1, h2)
def _get_rendered_text_width(self, text):
"""
Return the width of a given text string, in pixels.
"""
w, h, d = _get_text_metrics_with_cache(
self._renderer, text, self.get_fontproperties(),
cbook.is_math_text(text),
self.get_figure(root=True).dpi)
return math.ceil(w)
def _get_wrapped_text(self):
"""
Return a copy of the text string with new lines added so that the text
is wrapped relative to the parent figure (if `get_wrap` is True).
"""
if not self.get_wrap():
return self.get_text()
# Not fit to handle breaking up latex syntax correctly, so
# ignore latex for now.
if self.get_usetex():
return self.get_text()
# Build the line incrementally, for a more accurate measure of length
line_width = self._get_wrap_line_width()
wrapped_lines = []
# New lines in the user's text force a split
unwrapped_lines = self.get_text().split('\n')
# Now wrap each individual unwrapped line
for unwrapped_line in unwrapped_lines:
sub_words = unwrapped_line.split(' ')
# Remove items from sub_words as we go, so stop when empty
while len(sub_words) > 0:
if len(sub_words) == 1:
# Only one word, so just add it to the end
wrapped_lines.append(sub_words.pop(0))
continue
for i in range(2, len(sub_words) + 1):
# Get width of all words up to and including here
line = ' '.join(sub_words[:i])
current_width = self._get_rendered_text_width(line)
# If all these words are too wide, append all not including
# last word
if current_width > line_width:
wrapped_lines.append(' '.join(sub_words[:i - 1]))
sub_words = sub_words[i - 1:]
break
# Otherwise if all words fit in the width, append them all
elif i == len(sub_words):
wrapped_lines.append(' '.join(sub_words[:i]))
sub_words = []
break
return '\n'.join(wrapped_lines)
@artist.allow_rasterization
def draw(self, renderer):
# docstring inherited
if renderer is not None:
self._renderer = renderer
if not self.get_visible():
return
if self.get_text() == '':
return
renderer.open_group('text', self.get_gid())
with self._cm_set(text=self._get_wrapped_text()):
bbox, info, descent = self._get_layout(renderer)
trans = self.get_transform()
# don't use self.get_position here, which refers to text
# position in Text:
x, y = self._x, self._y
if np.ma.is_masked(x):
x = np.nan
if np.ma.is_masked(y):
y = np.nan
posx = float(self.convert_xunits(x))
posy = float(self.convert_yunits(y))
posx, posy = trans.transform((posx, posy))
if np.isnan(posx) or np.isnan(posy):
return # don't throw a warning here
if not np.isfinite(posx) or not np.isfinite(posy):
_log.warning("posx and posy should be finite values")
return
canvasw, canvash = renderer.get_canvas_width_height()
# Update the location and size of the bbox
# (`.patches.FancyBboxPatch`), and draw it.
if self._bbox_patch:
self.update_bbox_position_size(renderer)
self._bbox_patch.draw(renderer)
gc = renderer.new_gc()
gc.set_foreground(self.get_color())
gc.set_alpha(self.get_alpha())
gc.set_url(self._url)
gc.set_antialiased(self._antialiased)
self._set_gc_clip(gc)
angle = self.get_rotation()
for line, wh, x, y in info:
mtext = self if len(info) == 1 else None
x = x + posx
y = y + posy
if renderer.flipy():
y = canvash - y
clean_line, ismath = self._preprocess_math(line)
if self.get_path_effects():
from matplotlib.patheffects import PathEffectRenderer
textrenderer = PathEffectRenderer(
self.get_path_effects(), renderer)
else:
textrenderer = renderer
if self.get_usetex():
textrenderer.draw_tex(gc, x, y, clean_line,
self._fontproperties, angle,
mtext=mtext)
else:
textrenderer.draw_text(gc, x, y, clean_line,
self._fontproperties, angle,
ismath=ismath, mtext=mtext)
gc.restore()
renderer.close_group('text')
self.stale = False
def get_color(self):
"""Return the color of the text."""
return self._color
def get_fontproperties(self):
"""Return the `.font_manager.FontProperties`."""
return self._fontproperties
def get_fontfamily(self):
"""
Return the list of font families used for font lookup.
See Also
--------
.font_manager.FontProperties.get_family
"""
return self._fontproperties.get_family()
def get_fontname(self):
"""
Return the font name as a string.
See Also
--------
.font_manager.FontProperties.get_name
"""
return self._fontproperties.get_name()
def get_fontstyle(self):
"""
Return the font style as a string.
See Also
--------
.font_manager.FontProperties.get_style
"""
return self._fontproperties.get_style()
def get_fontsize(self):
"""
Return the font size as an integer.
See Also
--------
.font_manager.FontProperties.get_size_in_points
"""
return self._fontproperties.get_size_in_points()
def get_fontvariant(self):
"""
Return the font variant as a string.
See Also
--------
.font_manager.FontProperties.get_variant
"""
return self._fontproperties.get_variant()
def get_fontweight(self):
"""
Return the font weight as a string or a number.
See Also
--------
.font_manager.FontProperties.get_weight
"""
return self._fontproperties.get_weight()
def get_stretch(self):
"""
Return the font stretch as a string or a number.
See Also
--------
.font_manager.FontProperties.get_stretch
"""
return self._fontproperties.get_stretch()
def get_horizontalalignment(self):
"""
Return the horizontal alignment as a string. Will be one of
'left', 'center' or 'right'.
"""
return self._horizontalalignment
def get_unitless_position(self):
"""Return the (x, y) unitless position of the text."""
# This will get the position with all unit information stripped away.
# This is here for convenience since it is done in several locations.
x = float(self.convert_xunits(self._x))
y = float(self.convert_yunits(self._y))
return x, y
def get_position(self):
"""Return the (x, y) position of the text."""
# This should return the same data (possible unitized) as was
# specified with 'set_x' and 'set_y'.
return self._x, self._y
def get_text(self):
"""Return the text string."""
return self._text
def get_verticalalignment(self):
"""
Return the vertical alignment as a string. Will be one of
'top', 'center', 'bottom', 'baseline' or 'center_baseline'.
"""
return self._verticalalignment
def get_window_extent(self, renderer=None, dpi=None):
"""
Return the `.Bbox` bounding the text, in display units.
In addition to being used internally, this is useful for specifying
clickable regions in a png file on a web page.
Parameters
----------
renderer : Renderer, optional
A renderer is needed to compute the bounding box. If the artist
has already been drawn, the renderer is cached; thus, it is only
necessary to pass this argument when calling `get_window_extent`
before the first draw. In practice, it is usually easier to
trigger a draw first, e.g. by calling
`~.Figure.draw_without_rendering` or ``plt.show()``.
dpi : float, optional
The dpi value for computing the bbox, defaults to
``self.get_figure(root=True).dpi`` (*not* the renderer dpi); should be set
e.g. if to match regions with a figure saved with a custom dpi value.
"""
if not self.get_visible():
return Bbox.unit()
fig = self.get_figure(root=True)
if dpi is None:
dpi = fig.dpi
if self.get_text() == '':
with cbook._setattr_cm(fig, dpi=dpi):
tx, ty = self._get_xy_display()
return Bbox.from_bounds(tx, ty, 0, 0)
if renderer is not None:
self._renderer = renderer
if self._renderer is None:
self._renderer = fig._get_renderer()
if self._renderer is None:
raise RuntimeError(
"Cannot get window extent of text w/o renderer. You likely "
"want to call 'figure.draw_without_rendering()' first.")
with cbook._setattr_cm(fig, dpi=dpi):
bbox, info, descent = self._get_layout(self._renderer)
x, y = self.get_unitless_position()
x, y = self.get_transform().transform((x, y))
bbox = bbox.translated(x, y)
return bbox
def set_backgroundcolor(self, color):
"""
Set the background color of the text by updating the bbox.
Parameters
----------
color : :mpltype:`color`
See Also
--------
.set_bbox : To change the position of the bounding box
"""
if self._bbox_patch is None:
self.set_bbox(dict(facecolor=color, edgecolor=color))
else:
self._bbox_patch.update(dict(facecolor=color))
self._update_clip_properties()
self.stale = True
def set_color(self, color):
"""
Set the foreground color of the text
Parameters
----------