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MAX_PERCENTS = 100.0
class Bar(object):
bars = None
def __init__(self, value):
self.value = value
class HBar(Bar):
bars = [
"\u2581",
"\u2582",
"\u2583",
"\u2584",
"\u2585",
"\u2586",
"\u2587",
"\u2588",
]
"""This class is a helper class used to draw horizontal bars - please use hbar directly
:param value: percentage value to draw (float, between 0 and 100)
"""
def __init__(self, value):
super(HBar, self).__init__(value)
self.step = MAX_PERCENTS / len(HBar.bars)
def get_char(self):
"""Returns the character representing the current object's value
:return: character representing the value passed during initialization
:rtype: string with one character
"""
for i in range(len(HBar.bars)):
left = i * self.step
right = (i + 1) * self.step
if left <= self.value < right:
return self.bars[i]
return self.bars[-1]
def hbar(value):
""""Retrieves the horizontal bar character representing the input value
:param value: percentage value to draw (float, between 0 and 100)
:return: character representing the value passed during initialization
:rtype: string with one character
"""
return HBar(value).get_char()
class VBar(Bar):
bars = [
"\u258f",
"\u258e",
"\u258d",
"\u258c",
"\u258b",
"\u258a",
"\u2589",
"\u2588",
]
"""This class is a helper class used to draw vertical bars - please use vbar directly
:param value: percentage value to draw (float, between 0 and 100)
:param width: maximum width of the bar in characters
"""
def __init__(self, value, width=1):
super(VBar, self).__init__(value)
self.step = MAX_PERCENTS / (len(VBar.bars) * width)
self.width = width
"""Returns the characters representing the current object's value
:return: characters representing the value passed during initialization
:rtype: string
"""
def get_chars(self):
if self.value == 100:
return self.bars[-1] * self.width
if self.width == 1:
for i in range(len(VBar.bars)):
left = i * self.step
right = (i + 1) * self.step
if left <= self.value < right:
return self.bars[i]
else:
full_parts = int(self.value // (self.step * len(Vbar.bars)))
remainder = self.value - full_parts * self.step * CHARS
empty_parts = self.width - full_parts
if remainder >= 0:
empty_parts -= 1
part_vbar = VBar(remainder * self.width) # scale to width
chars = self.bars[-1] * full_parts
chars += part_vbar.get_chars()
chars += " " * empty_parts
return chars
def vbar(value, width):
"""Returns the characters representing the current object's value
:param value: percentage value to draw (float, between 0 and 100)
:param width: maximum width of the bar in characters
:return: characters representing the value passed during initialization
:rtype: string
"""
return VBar(value, width).get_chars()
class BrailleGraph(object):
chars = {
(0, 0): " ",
(1, 0): "\u2840",
(2, 0): "\u2844",
(3, 0): "\u2846",
(4, 0): "\u2847",
(0, 1): "\u2880",
(0, 2): "\u28a0",
(0, 3): "\u28b0",
(0, 4): "\u28b8",
(1, 1): "\u28c0",
(2, 1): "\u28c4",
(3, 1): "\u28c6",
(4, 1): "\u28c7",
(1, 2): "\u28e0",
(2, 2): "\u28e4",
(3, 2): "\u28e6",
(4, 2): "\u28e7",
(1, 3): "\u28f0",
(2, 3): "\u28f4",
(3, 3): "\u28f6",
(4, 3): "\u28f7",
(1, 4): "\u28f8",
(2, 4): "\u28fc",
(3, 4): "\u28fe",
(4, 4): "\u28ff",
}
"""This class is a helper class used to draw braille graphs - please use braille directly
:param values: values to draw
"""
def __init__(self, values):
self.values = values
# length of values list must be even
# because one Braille char displays two values
if len(self.values) % 2 == 1:
self.values.append(0)
self.steps = self.get_steps()
self.parts = [tuple(self.steps[i : i + 2]) for i in range(len(self.steps))[::2]]
@staticmethod
def get_height(value, unit):
if value < unit / 10.0:
return 0
elif value <= unit:
return 1
elif value <= unit * 2:
return 2
elif value <= unit * 3:
return 3
else:
return 4
def get_steps(self):
maxval = max(self.values)
unit = maxval / 4.0
if unit == 0:
return [0] * len(self.values)
stepslist = []
for value in self.values:
stepslist.append(self.get_height(value, unit))
return stepslist
def get_chars(self):
chars = []
for part in self.parts:
chars.append(BrailleGraph.chars[part])
return "".join(chars)
def braille(values):
return BrailleGraph(values).get_chars()
# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4
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