matplotlib/lib/matplotlib/text.py at v3.8.3 · matplotlib/matplotlib · GitHub

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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"],

"fontfamily": ["family"],

"fontproperties": ["font", "font_properties"],

"horizontalalignment": ["ha"],

"multialignment": ["ma"],

"fontname": ["name"],

"fontsize": ["size"],

"fontstretch": ["stretch"],

"fontstyle": ["style"],

"fontvariant": ["variant"],

"verticalalignment": ["va"],

"fontweight": ["weight"],

})

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.figure.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.figure.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.

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 / math.cos(math.radians(quad))

h2 = (figure_box.x1 - x0) / math.cos(math.radians(90 - quad))

elif rotation > 180:

quad = rotation - 180

h1 = x0 / math.cos(math.radians(quad))

h2 = 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 / 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 = self._renderer.get_text_width_height_descent(

text,

self.get_fontproperties(),

cbook.is_math_text(text))

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:

posx = float(self.convert_xunits(self._x))

posy = float(self.convert_yunits(self._y))

posx, posy = trans.transform((posx, posy))

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.figure.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()

if dpi is None:

dpi = self.figure.dpi

if self.get_text() == '':

with cbook._setattr_cm(self.figure, 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 = self.figure._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(self.figure, 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 : 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

----------

color : color

"""

# "auto" is only supported by axisartist, but we can just let it error

# out at draw time for simplicity.

if not cbook._str_equal(color, "auto"):

mpl.colors._check_color_like(color=color)

self._color = color

self.stale = True

def set_horizontalalignment(self, align):

"""

Set the horizontal alignment relative to the anchor point.

View remainder of file in raw view

matplotlib/lib/matplotlib/text.py at v3.8.3 · matplotlib/matplotlib · GitHub

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