/usr/lib/python2.7/dist-packages/aplpy/labels.py is in python-aplpy 1.0-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 | # -*- coding: utf-8 -*-
from __future__ import absolute_import, print_function, division, unicode_literals
import warnings
import numpy as np
import matplotlib.pyplot as mpl
from matplotlib.font_manager import FontProperties
from . import wcs_util
from . import angle_util as au
from .decorators import auto_refresh, fixdocstring
class TickLabels(object):
def __init__(self, parent):
# Store references to axes
self._ax1 = parent._ax1
self._ax2 = parent._ax2
self._wcs = parent._wcs
self._figure = parent._figure
# Save plotting parameters (required for @auto_refresh)
self._parameters = parent._parameters
# Set font
self._label_fontproperties = FontProperties()
self.set_style('plain')
system, equinox, units = wcs_util.system(self._wcs)
# Set default label format
if self._wcs.xaxis_coord_type in ['longitude', 'latitude']:
if system['name'] == 'equatorial':
if self._wcs.xaxis_coord_type == 'longitude':
self.set_xformat("hh:mm:ss.ss")
else:
self.set_xformat("dd:mm:ss.s")
else:
self.set_xformat("ddd.dddd")
else:
self.set_xformat('%g')
if self._wcs.yaxis_coord_type in ['longitude', 'latitude']:
if system['name'] == 'equatorial':
if self._wcs.yaxis_coord_type == 'longitude':
self.set_yformat("hh:mm:ss.ss")
else:
self.set_yformat("dd:mm:ss.s")
else:
self.set_yformat("ddd.dddd")
else:
self.set_yformat('%g')
# Set major tick formatters
fx1 = WCSFormatter(wcs=self._wcs, coord='x')
fy1 = WCSFormatter(wcs=self._wcs, coord='y')
self._ax1.xaxis.set_major_formatter(fx1)
self._ax1.yaxis.set_major_formatter(fy1)
fx2 = mpl.NullFormatter()
fy2 = mpl.NullFormatter()
self._ax2.xaxis.set_major_formatter(fx2)
self._ax2.yaxis.set_major_formatter(fy2)
# Cursor display
self._ax1._cursor_world = True
self._figure.canvas.mpl_connect('key_press_event', self._set_cursor_prefs)
@auto_refresh
def set_xformat(self, format):
'''
Set the format of the x-axis tick labels.
If the x-axis type is ``longitude`` or ``latitude``, then the options
are:
* ``ddd.ddddd`` - decimal degrees, where the number of decimal places can be varied
* ``hh`` or ``dd`` - hours (or degrees)
* ``hh:mm`` or ``dd:mm`` - hours and minutes (or degrees and arcminutes)
* ``hh:mm:ss`` or ``dd:mm:ss`` - hours, minutes, and seconds (or degrees, arcminutes, and arcseconds)
* ``hh:mm:ss.ss`` or ``dd:mm:ss.ss`` - hours, minutes, and seconds (or degrees, arcminutes, and arcseconds), where the number of decimal places can be varied.
If the x-axis type is ``scalar``, then the format should be a valid
python string format beginning with a ``%``.
If one of these arguments is not specified, the format for that axis
is left unchanged.
'''
if self._wcs.xaxis_coord_type in ['longitude', 'latitude']:
if format.startswith('%'):
raise Exception("Cannot specify Python format for longitude or latitude")
try:
if not self._ax1.xaxis.apl_auto_tick_spacing:
au._check_format_spacing_consistency(format, self._ax1.xaxis.apl_tick_spacing)
except au.InconsistentSpacing:
warnings.warn("WARNING: Requested label format is not accurate enough to display ticks. The label format will not be changed.")
return
else:
if not format.startswith('%'):
raise Exception("For scalar tick labels, format should be a Python format beginning with %")
self._ax1.xaxis.apl_label_form = format
self._ax2.xaxis.apl_label_form = format
@auto_refresh
def set_yformat(self, format):
'''
Set the format of the y-axis tick labels.
If the y-axis type is ``longitude`` or ``latitude``, then the options
are:
* ``ddd.ddddd`` - decimal degrees, where the number of decimal places can be varied
* ``hh`` or ``dd`` - hours (or degrees)
* ``hh:mm`` or ``dd:mm`` - hours and minutes (or degrees and arcminutes)
* ``hh:mm:ss`` or ``dd:mm:ss`` - hours, minutes, and seconds (or degrees, arcminutes, and arcseconds)
* ``hh:mm:ss.ss`` or ``dd:mm:ss.ss`` - hours, minutes, and seconds (or degrees, arcminutes, and arcseconds), where the number of decimal places can be varied.
If the y-axis type is ``scalar``, then the format should be a valid
python string format beginning with a ``%``.
If one of these arguments is not specified, the format for that axis
is left unchanged.
'''
if self._wcs.yaxis_coord_type in ['longitude', 'latitude']:
if format.startswith('%'):
raise Exception("Cannot specify Python format for longitude or latitude")
try:
if not self._ax1.yaxis.apl_auto_tick_spacing:
au._check_format_spacing_consistency(format, self._ax1.yaxis.apl_tick_spacing)
except au.InconsistentSpacing:
warnings.warn("WARNING: Requested label format is not accurate enough to display ticks. The label format will not be changed.")
return
else:
if not format.startswith('%'):
raise Exception("For scalar tick labels, format should be a Python format beginning with %")
self._ax1.yaxis.apl_label_form = format
self._ax2.yaxis.apl_label_form = format
@auto_refresh
def set_style(self, style):
"""
Set the format of the x-axis tick labels.
This can be 'colons' or 'plain':
* 'colons' uses colons as separators, for example 31:41:59.26 +27:18:28.1
* 'plain' uses letters and symbols as separators, for example 31h41m59.26s +27ยบ18'28.1"
"""
if style == 'latex':
warnings.warn("latex has now been merged with plain - whether or not to use LaTeX is controlled through set_system_latex")
style = 'plain'
if not style in ['colons', 'plain']:
raise Exception("Label style should be one of colons/plain")
self._ax1.xaxis.apl_labels_style = style
self._ax1.yaxis.apl_labels_style = style
self._ax2.xaxis.apl_labels_style = style
self._ax2.yaxis.apl_labels_style = style
@auto_refresh
@fixdocstring
def set_font(self, family=None, style=None, variant=None, stretch=None, weight=None, size=None, fontproperties=None):
"""
Set the font of the tick labels.
Parameters
----------
common: family, style, variant, stretch, weight, size, fontproperties
Notes
-----
Default values are set by matplotlib or previously set values if
set_font has already been called. Global default values can be set by
editing the matplotlibrc file.
"""
if family:
self._label_fontproperties.set_family(family)
if style:
self._label_fontproperties.set_style(style)
if variant:
self._label_fontproperties.set_variant(variant)
if stretch:
self._label_fontproperties.set_stretch(stretch)
if weight:
self._label_fontproperties.set_weight(weight)
if size:
self._label_fontproperties.set_size(size)
if fontproperties:
self._label_fontproperties = fontproperties
for tick in self._ax1.get_xticklabels():
tick.set_fontproperties(self._label_fontproperties)
for tick in self._ax1.get_yticklabels():
tick.set_fontproperties(self._label_fontproperties)
for tick in self._ax2.get_xticklabels():
tick.set_fontproperties(self._label_fontproperties)
for tick in self._ax2.get_yticklabels():
tick.set_fontproperties(self._label_fontproperties)
@auto_refresh
def show(self):
"""
Show the x- and y-axis tick labels.
"""
self.show_x()
self.show_y()
@auto_refresh
def hide(self):
"""
Hide the x- and y-axis tick labels.
"""
self.hide_x()
self.hide_y()
@auto_refresh
def show_x(self):
"""
Show the x-axis tick labels.
"""
for tick in self._ax1.get_xticklabels():
tick.set_visible(True)
for tick in self._ax2.get_xticklabels():
tick.set_visible(True)
@auto_refresh
def hide_x(self):
"""
Hide the x-axis tick labels.
"""
for tick in self._ax1.get_xticklabels():
tick.set_visible(False)
for tick in self._ax2.get_xticklabels():
tick.set_visible(False)
@auto_refresh
def show_y(self):
"""
Show the y-axis tick labels.
"""
for tick in self._ax1.get_yticklabels():
tick.set_visible(True)
for tick in self._ax2.get_yticklabels():
tick.set_visible(True)
@auto_refresh
def hide_y(self):
"""
Hide the y-axis tick labels.
"""
for tick in self._ax1.get_yticklabels():
tick.set_visible(False)
for tick in self._ax2.get_yticklabels():
tick.set_visible(False)
@auto_refresh
def set_xposition(self, position):
"""
Set the position of the x-axis tick labels ('top' or 'bottom')
"""
if position == 'bottom':
fx1 = WCSFormatter(wcs=self._wcs, coord='x')
self._ax1.xaxis.set_major_formatter(fx1)
fx2 = mpl.NullFormatter()
self._ax2.xaxis.set_major_formatter(fx2)
elif position == 'top':
fx1 = mpl.NullFormatter()
self._ax1.xaxis.set_major_formatter(fx1)
fx2 = WCSFormatter(wcs=self._wcs, coord='x')
self._ax2.xaxis.set_major_formatter(fx2)
else:
raise ValueError("position should be one of 'top' or 'bottom'")
@auto_refresh
def set_yposition(self, position):
"""
Set the position of the y-axis tick labels ('left' or 'right')
"""
if position == 'left':
fy1 = WCSFormatter(wcs=self._wcs, coord='y')
self._ax1.yaxis.set_major_formatter(fy1)
fy2 = mpl.NullFormatter()
self._ax2.yaxis.set_major_formatter(fy2)
elif position == 'right':
fy1 = mpl.NullFormatter()
self._ax1.yaxis.set_major_formatter(fy1)
fy2 = WCSFormatter(wcs=self._wcs, coord='y')
self._ax2.yaxis.set_major_formatter(fy2)
else:
raise ValueError("position should be one of 'left' or 'right'")
def _set_cursor_prefs(self, event, **kwargs):
if event.key == 'c':
self._ax1._cursor_world = not self._ax1._cursor_world
def _cursor_position(self, x, y):
xaxis = self._ax1.xaxis
yaxis = self._ax1.yaxis
if self._ax1._cursor_world:
xw, yw = wcs_util.pix2world(self._wcs, x, y)
if self._wcs.xaxis_coord_type in ['longitude', 'latitude']:
xw = au.Angle(degrees=xw, latitude=self._wcs.xaxis_coord_type == 'latitude')
hours = 'h' in xaxis.apl_label_form
if hours:
xw = xw.tohours()
if xaxis.apl_labels_style in ['plain', 'latex']:
sep = ('d', 'm', 's')
if hours:
sep = ('h', 'm', 's')
elif xaxis.apl_labels_style == 'colons':
sep = (':', ':', '')
xlabel = xw.tostringlist(format=xaxis.apl_label_form, sep=sep)
xlabel = "".join(xlabel)
else:
xlabel = xaxis.apl_label_form % xw
if self._wcs.yaxis_coord_type in ['longitude', 'latitude']:
yw = au.Angle(degrees=yw, latitude=self._wcs.yaxis_coord_type == 'latitude')
hours = 'h' in yaxis.apl_label_form
if hours:
yw = yw.tohours()
if yaxis.apl_labels_style in ['plain', 'latex']:
sep = ('d', 'm', 's')
if hours:
sep = ('h', 'm', 's')
elif yaxis.apl_labels_style == 'colons':
sep = (':', ':', '')
ylabel = yw.tostringlist(format=yaxis.apl_label_form, sep=sep)
ylabel = "".join(ylabel)
else:
ylabel = yaxis.apl_label_form % yw
return "%s %s (world)" % (xlabel, ylabel)
else:
return "%g %g (pixel)" % (x, y)
class WCSFormatter(mpl.Formatter):
def __init__(self, wcs=False, coord='x'):
self._wcs = wcs
self.coord = coord
def __call__(self, x, pos=None):
"""
Return the format for tick val x at position pos; pos=None indicated
unspecified
"""
self.coord_type = self._wcs.xaxis_coord_type if self.coord == 'x' else self._wcs.yaxis_coord_type
if self.coord_type in ['longitude', 'latitude']:
au._check_format_spacing_consistency(self.axis.apl_label_form, self.axis.apl_tick_spacing)
hours = 'h' in self.axis.apl_label_form
if self.axis.apl_labels_style == 'plain':
if mpl.rcParams['text.usetex']:
label_style = 'plain_tex'
else:
label_style = 'plain_notex'
else:
label_style = self.axis.apl_labels_style
if label_style == 'plain_notex':
sep = ('\u00b0', "'", '"')
if hours:
sep = ('h', 'm', 's')
elif label_style == 'colons':
sep = (':', ':', '')
elif label_style == 'plain_tex':
if hours:
sep = ('^{h}', '^{m}', '^{s}')
else:
sep = ('^{\circ}', '^{\prime}', '^{\prime\prime}')
ipos = np.argmin(np.abs(self.axis.apl_tick_positions_pix - x))
label = self.axis.apl_tick_spacing * self.axis.apl_tick_positions_world[ipos]
if hours:
label = label.tohours()
label = label.tostringlist(format=self.axis.apl_label_form, sep=sep)
# Check if neighboring label is similar and if so whether some
# elements of the current label are redundant and can be dropped.
# This should only be done for sexagesimal coordinates
if len(label) > 1:
if self.coord == x or self.axis.apl_tick_positions_world[ipos] > 0:
comp_ipos = ipos - 1
else:
comp_ipos = ipos + 1
if comp_ipos >= 0 and comp_ipos <= len(self.axis.apl_tick_positions_pix) - 1:
comp_label = self.axis.apl_tick_spacing * self.axis.apl_tick_positions_world[comp_ipos]
if hours:
comp_label = comp_label.tohours()
comp_label = comp_label.tostringlist(format=self.axis.apl_label_form, sep=sep)
for iter in range(len(label)):
if comp_label[0] == label[0]:
label.pop(0)
comp_label.pop(0)
else:
break
else:
ipos = np.argmin(np.abs(self.axis.apl_tick_positions_pix - x))
label = self.axis.apl_tick_spacing * self.axis.apl_tick_positions_world[ipos]
label = self.axis.apl_label_form % label
if mpl.rcParams['text.usetex']:
return "$" + "".join(label) + "$"
else:
return "".join(label)
|