mirror of https://github.com/saitohirga/WSJT-X.git
362 lines
11 KiB
Python
362 lines
11 KiB
Python
# Functions for converting colors and modifying the color scheme of
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# an application.
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import math
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import string
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import sys
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import Tkinter
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_PI = math.pi
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_TWO_PI = _PI * 2
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_THIRD_PI = _PI / 3
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_SIXTH_PI = _PI / 6
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_MAX_RGB = float(256 * 256 - 1) # max size of rgb values returned from Tk
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def setscheme(root, background=None, **kw):
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root = root._root()
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palette = apply(_calcPalette, (root, background,), kw)
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for option, value in palette.items():
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root.option_add('*' + option, value, 'widgetDefault')
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def getdefaultpalette(root):
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# Return the default values of all options, using the defaults
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# from a few widgets.
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ckbtn = Tkinter.Checkbutton(root)
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entry = Tkinter.Entry(root)
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scbar = Tkinter.Scrollbar(root)
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orig = {}
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orig['activeBackground'] = str(ckbtn.configure('activebackground')[4])
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orig['activeForeground'] = str(ckbtn.configure('activeforeground')[4])
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orig['background'] = str(ckbtn.configure('background')[4])
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orig['disabledForeground'] = str(ckbtn.configure('disabledforeground')[4])
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orig['foreground'] = str(ckbtn.configure('foreground')[4])
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orig['highlightBackground'] = str(ckbtn.configure('highlightbackground')[4])
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orig['highlightColor'] = str(ckbtn.configure('highlightcolor')[4])
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orig['insertBackground'] = str(entry.configure('insertbackground')[4])
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orig['selectColor'] = str(ckbtn.configure('selectcolor')[4])
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orig['selectBackground'] = str(entry.configure('selectbackground')[4])
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orig['selectForeground'] = str(entry.configure('selectforeground')[4])
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orig['troughColor'] = str(scbar.configure('troughcolor')[4])
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ckbtn.destroy()
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entry.destroy()
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scbar.destroy()
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return orig
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#======================================================================
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# Functions dealing with brightness, hue, saturation and intensity of colors.
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def changebrightness(root, colorName, brightness):
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# Convert the color name into its hue and back into a color of the
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# required brightness.
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rgb = name2rgb(root, colorName)
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hue, saturation, intensity = rgb2hsi(rgb)
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if saturation == 0.0:
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hue = None
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return hue2name(hue, brightness)
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def hue2name(hue, brightness = None):
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# Convert the requested hue and brightness into a color name. If
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# hue is None, return a grey of the requested brightness.
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if hue is None:
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rgb = hsi2rgb(0.0, 0.0, brightness)
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else:
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while hue < 0:
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hue = hue + _TWO_PI
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while hue >= _TWO_PI:
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hue = hue - _TWO_PI
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rgb = hsi2rgb(hue, 1.0, 1.0)
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if brightness is not None:
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b = rgb2brightness(rgb)
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i = 1.0 - (1.0 - brightness) * b
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s = bhi2saturation(brightness, hue, i)
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rgb = hsi2rgb(hue, s, i)
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return rgb2name(rgb)
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def bhi2saturation(brightness, hue, intensity):
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while hue < 0:
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hue = hue + _TWO_PI
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while hue >= _TWO_PI:
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hue = hue - _TWO_PI
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hue = hue / _THIRD_PI
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f = hue - math.floor(hue)
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pp = intensity
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pq = intensity * f
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pt = intensity - intensity * f
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pv = 0
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hue = int(hue)
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if hue == 0: rgb = (pv, pt, pp)
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elif hue == 1: rgb = (pq, pv, pp)
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elif hue == 2: rgb = (pp, pv, pt)
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elif hue == 3: rgb = (pp, pq, pv)
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elif hue == 4: rgb = (pt, pp, pv)
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elif hue == 5: rgb = (pv, pp, pq)
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return (intensity - brightness) / rgb2brightness(rgb)
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def hsi2rgb(hue, saturation, intensity):
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i = intensity
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if saturation == 0:
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rgb = [i, i, i]
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else:
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while hue < 0:
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hue = hue + _TWO_PI
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while hue >= _TWO_PI:
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hue = hue - _TWO_PI
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hue = hue / _THIRD_PI
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f = hue - math.floor(hue)
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p = i * (1.0 - saturation)
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q = i * (1.0 - saturation * f)
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t = i * (1.0 - saturation * (1.0 - f))
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hue = int(hue)
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if hue == 0: rgb = [i, t, p]
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elif hue == 1: rgb = [q, i, p]
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elif hue == 2: rgb = [p, i, t]
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elif hue == 3: rgb = [p, q, i]
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elif hue == 4: rgb = [t, p, i]
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elif hue == 5: rgb = [i, p, q]
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for index in range(3):
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val = rgb[index]
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if val < 0.0:
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val = 0.0
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if val > 1.0:
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val = 1.0
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rgb[index] = val
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return rgb
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def average(rgb1, rgb2, fraction):
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return (
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rgb2[0] * fraction + rgb1[0] * (1.0 - fraction),
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rgb2[1] * fraction + rgb1[1] * (1.0 - fraction),
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rgb2[2] * fraction + rgb1[2] * (1.0 - fraction)
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)
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def rgb2name(rgb):
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return '#%02x%02x%02x' % \
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(int(rgb[0] * 255), int(rgb[1] * 255), int(rgb[2] * 255))
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def rgb2brightness(rgb):
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# Return the perceived grey level of the color
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# (0.0 == black, 1.0 == white).
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rf = 0.299
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gf = 0.587
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bf = 0.114
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return rf * rgb[0] + gf * rgb[1] + bf * rgb[2]
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def rgb2hsi(rgb):
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maxc = max(rgb[0], rgb[1], rgb[2])
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minc = min(rgb[0], rgb[1], rgb[2])
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intensity = maxc
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if maxc != 0:
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saturation = (maxc - minc) / maxc
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else:
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saturation = 0.0
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hue = 0.0
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if saturation != 0.0:
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c = []
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for index in range(3):
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c.append((maxc - rgb[index]) / (maxc - minc))
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if rgb[0] == maxc:
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hue = c[2] - c[1]
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elif rgb[1] == maxc:
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hue = 2 + c[0] - c[2]
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elif rgb[2] == maxc:
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hue = 4 + c[1] - c[0]
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hue = hue * _THIRD_PI
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if hue < 0.0:
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hue = hue + _TWO_PI
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return (hue, saturation, intensity)
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def name2rgb(root, colorName, asInt = 0):
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if colorName[0] == '#':
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# Extract rgb information from the color name itself, assuming
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# it is either #rgb, #rrggbb, #rrrgggbbb, or #rrrrggggbbbb
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# This is useful, since tk may return incorrect rgb values if
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# the colormap is full - it will return the rbg values of the
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# closest color available.
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colorName = colorName[1:]
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digits = len(colorName) / 3
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factor = 16 ** (4 - digits)
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rgb = (
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string.atoi(colorName[0:digits], 16) * factor,
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string.atoi(colorName[digits:digits * 2], 16) * factor,
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string.atoi(colorName[digits * 2:digits * 3], 16) * factor,
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)
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else:
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# We have no choice but to ask Tk what the rgb values are.
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rgb = root.winfo_rgb(colorName)
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if not asInt:
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rgb = (rgb[0] / _MAX_RGB, rgb[1] / _MAX_RGB, rgb[2] / _MAX_RGB)
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return rgb
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def _calcPalette(root, background=None, **kw):
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# Create a map that has the complete new palette. If some colors
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# aren't specified, compute them from other colors that are specified.
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new = {}
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for key, value in kw.items():
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new[key] = value
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if background is not None:
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new['background'] = background
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if not new.has_key('background'):
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raise ValueError, 'must specify a background color'
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if not new.has_key('foreground'):
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new['foreground'] = 'black'
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bg = name2rgb(root, new['background'])
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fg = name2rgb(root, new['foreground'])
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for i in ('activeForeground', 'insertBackground', 'selectForeground',
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'highlightColor'):
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if not new.has_key(i):
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new[i] = new['foreground']
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if not new.has_key('disabledForeground'):
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newCol = average(bg, fg, 0.3)
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new['disabledForeground'] = rgb2name(newCol)
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if not new.has_key('highlightBackground'):
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new['highlightBackground'] = new['background']
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# Set <lighterBg> to a color that is a little lighter that the
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# normal background. To do this, round each color component up by
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# 9% or 1/3 of the way to full white, whichever is greater.
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lighterBg = []
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for i in range(3):
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lighterBg.append(bg[i])
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inc1 = lighterBg[i] * 0.09
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inc2 = (1.0 - lighterBg[i]) / 3
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if inc1 > inc2:
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lighterBg[i] = lighterBg[i] + inc1
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else:
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lighterBg[i] = lighterBg[i] + inc2
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if lighterBg[i] > 1.0:
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lighterBg[i] = 1.0
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# Set <darkerBg> to a color that is a little darker that the
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# normal background.
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darkerBg = (bg[0] * 0.9, bg[1] * 0.9, bg[2] * 0.9)
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if not new.has_key('activeBackground'):
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# If the foreground is dark, pick a light active background.
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# If the foreground is light, pick a dark active background.
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# XXX This has been disabled, since it does not look very
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# good with dark backgrounds. If this is ever fixed, the
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# selectBackground and troughColor options should also be fixed.
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if rgb2brightness(fg) < 0.5:
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new['activeBackground'] = rgb2name(lighterBg)
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else:
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new['activeBackground'] = rgb2name(lighterBg)
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if not new.has_key('selectBackground'):
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new['selectBackground'] = rgb2name(darkerBg)
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if not new.has_key('troughColor'):
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new['troughColor'] = rgb2name(darkerBg)
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if not new.has_key('selectColor'):
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new['selectColor'] = 'yellow'
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return new
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def spectrum(numColors, correction = 1.0, saturation = 1.0, intensity = 1.0,
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extraOrange = 1, returnHues = 0):
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colorList = []
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division = numColors / 7.0
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for index in range(numColors):
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if extraOrange:
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if index < 2 * division:
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hue = index / division
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else:
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hue = 2 + 2 * (index - 2 * division) / division
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hue = hue * _SIXTH_PI
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else:
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hue = index * _TWO_PI / numColors
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if returnHues:
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colorList.append(hue)
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else:
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rgb = hsi2rgb(hue, saturation, intensity)
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if correction != 1.0:
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rgb = correct(rgb, correction)
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name = rgb2name(rgb)
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colorList.append(name)
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return colorList
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def correct(rgb, correction):
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correction = float(correction)
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rtn = []
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for index in range(3):
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rtn.append((1 - (1 - rgb[index]) ** correction) ** (1 / correction))
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return rtn
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#==============================================================================
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def _recolorTree(widget, oldpalette, newcolors):
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# Change the colors in a widget and its descendants.
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# Change the colors in <widget> and all of its descendants,
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# according to the <newcolors> dictionary. It only modifies
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# colors that have their default values as specified by the
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# <oldpalette> variable. The keys of the <newcolors> dictionary
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# are named after widget configuration options and the values are
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# the new value for that option.
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for dbOption in newcolors.keys():
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option = string.lower(dbOption)
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try:
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value = str(widget.cget(option))
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except:
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continue
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if oldpalette is None or value == oldpalette[dbOption]:
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apply(widget.configure, (), {option : newcolors[dbOption]})
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for child in widget.winfo_children():
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_recolorTree(child, oldpalette, newcolors)
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def changecolor(widget, background=None, **kw):
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root = widget._root()
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if not hasattr(widget, '_Pmw_oldpalette'):
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widget._Pmw_oldpalette = getdefaultpalette(root)
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newpalette = apply(_calcPalette, (root, background,), kw)
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_recolorTree(widget, widget._Pmw_oldpalette, newpalette)
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widget._Pmw_oldpalette = newpalette
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def bordercolors(root, colorName):
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# This is the same method that Tk uses for shadows, in TkpGetShadows.
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lightRGB = []
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darkRGB = []
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for value in name2rgb(root, colorName, 1):
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value40pc = (14 * value) / 10
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if value40pc > _MAX_RGB:
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value40pc = _MAX_RGB
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valueHalfWhite = (_MAX_RGB + value) / 2;
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lightRGB.append(max(value40pc, valueHalfWhite))
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darkValue = (60 * value) / 100
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darkRGB.append(darkValue)
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return (
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'#%04x%04x%04x' % (lightRGB[0], lightRGB[1], lightRGB[2]),
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'#%04x%04x%04x' % (darkRGB[0], darkRGB[1], darkRGB[2])
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)
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