"""Custom Bruker Nanoscope colorscale."""
import logging
import matplotlib as mpl
import matplotlib.cm
import numpy as np
from matplotlib.colors import LinearSegmentedColormap, ListedColormap
from topostats.logs.logs import LOGGER_NAME
LOGGER = logging.getLogger(LOGGER_NAME)
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class Colormap:
"""
Class for setting the Colormap.
Parameters
----------
name : str
Name of colormap to use.
"""
def __init__(self, name: str = "nanoscope"):
"""
Initialise the class.
Parameters
----------
name : str
Name of colormap to use.
"""
self.name = name
self.cmap = None
self.set_cmap(self.name)
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def __str__(self) -> str:
"""
Return string representation of object.
Returns
-------
str
String detailing the colormap.
"""
return f"TopoStats Colormap: {self.name}"
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def set_cmap(self, name: str) -> None:
"""
Set the ColorMap.
Parameters
----------
name : str
Name of the colormap to return.
"""
if name.lower() == "nanoscope":
self.cmap = self.nanoscope()
elif name.lower() == "gwyddion":
self.cmap = self.gwyddion()
elif name.lower() == "blu":
self.cmap = self.blu()
else:
# Get one of the matplotlib colormaps
self.cmap = mpl.colormaps[name]
LOGGER.debug(f"[theme] Colormap set to : {name}")
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def get_cmap(self) -> matplotlib.cm:
"""
Return the matplotlib.cm colormap object.
Returns
-------
matplotlib.cm
Matplotlib Color map object.
"""
return self.cmap
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@staticmethod
def nanoscope() -> LinearSegmentedColormap:
"""
Matplotlib compatible colormap that replicates the Bruker Nanoscope colorscale.
The colormap is implemented in Gwyddion's GwyGradient via 'Nanoscope.txt'.
Returns
-------
LinearSegmentedColormap
MatplotLib LinearSegmentedColourmap that replicates Bruker Nanoscope colorscale.
"""
cdict = {
"red": (
(0.0, 0.0, 0.0),
(0.124464, 0.0, 0.0),
(0.236052, 0.0670103, 0.0670103),
(0.371245, 0.253338, 0.253338),
(0.472103, 0.392344, 0.392344),
(0.611588, 0.584587, 0.584587),
(0.708155, 0.717678, 0.717678),
(0.714052, 0.725806, 0.725806),
(0.890558, 0.969072, 0.969072),
(0.933476, 0.987464, 0.987464),
(0.944709, 0.992278, 0.992278),
(0.965682, 0.995207, 0.995207),
(0.971401, 0.996006, 0.996006),
(1, 1, 1),
),
"green": (
(0.0, 0.0, 0.0),
(0.124464, 0.0, 0.0),
(0.236052, 0.0, 0.0),
(0.371245, 0.0, 0.0),
(0.472103, 0.0721649, 0.0721649),
(0.611588, 0.334114, 0.334114),
(0.708155, 0.515464, 0.515464),
(0.714052, 0.527471, 0.527471),
(0.890558, 0.886843, 0.886843),
(0.933476, 0.974227, 0.974227),
(0.944709, 0.980523, 0.980523),
(0.965682, 0.992278, 0.992278),
(0.971401, 0.993565, 0.993565),
(1, 1, 1),
),
"blue": (
(0.0, 0.0, 0.0),
(0.124464, 0.0, 0.0),
(0.236052, 0.0, 0.0),
(0.371245, 0.0, 0.0),
(0.472103, 0.0, 0.0),
(0.611588, 0.0, 0.0),
(0.708155, 0.252575, 0.252575),
(0.714052, 0.268, 0.268),
(0.890558, 0.76343, 0.76343),
(0.933476, 0.883897, 0.883897),
(0.944709, 0.915426, 0.915426),
(0.965682, 0.974293, 0.974293),
(0.971401, 0.990347, 0.990347),
(1, 1, 1),
),
}
return LinearSegmentedColormap("nanoscope", cdict)
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@staticmethod
def gwyddion() -> LinearSegmentedColormap:
"""
Set RGBA colour map for the Gwyddion.net colour gradient.
Returns
-------
LinearSegmentedColormap
The 'gwyddion' colormap.
"""
N = 4 # Number of values
vals = np.ones((N, 4)) # Initialise the array to be full of 1.0
vals[0] = [0.0, 0.0, 0.0, 1]
vals[1] = [168 / 256, 40 / 256, 15 / 256, 1.0]
vals[2] = [243 / 256, 194 / 256, 93 / 256, 1.0]
vals[3] = [1.0, 1.0, 1.0, 1.0]
return LinearSegmentedColormap.from_list("gwyddion", vals, N=256)
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@staticmethod
def blu() -> ListedColormap:
"""
Set RGBA colour map of just the colour blue.
Returns
-------
ListedColormap
The 'blu' colormap.
"""
return ListedColormap([[32 / 256, 226 / 256, 205 / 256]], "blu", N=256)