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#!/usr/bin/python3
#
# COLOUR PICKER.
# This is a lightly modified version of urwids palette_test.py example
# script as found at
# https://raw.github.com/wardi/urwid/master/examples/palette_test.py
#
# This version simply omits resetting the screens default colour palette,
# and therefore displays the colour attributes as alot would render them in
# your terminal.
#
# Urwid Palette Test. Showing off highcolor support
# Copyright (C) 2004-2009 Ian Ward
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# Urwid web site: http://excess.org/urwid/
"""
Palette test. Shows the available foreground and background settings
in monochrome, 16 color, 88 color and 256 color modes.
"""
import re
import urwid
import urwid.raw_display
CHART_256 = """
brown__ dark_red_ dark_magenta_ dark_blue_ dark_cyan_ dark_green_
yellow_ light_red light_magenta light_blue light_cyan light_green
#00f#06f#08f#0af#0df#0ff black_______ dark_gray___
#60f#00d#06d#08d#0ad#0dd#0fd light_gray__ white_______
#80f#60d#00a#06a#08a#0aa#0da#0fa
#a0f#80d#60a#008#068#088#0a8#0d8#0f8
#d0f#a0d#80d#608#006#066#086#0a6#0d6#0f6
#f0f#d0d#a0a#808#606#000#060#080#0a0#0d0#0f0#0f6#0f8#0fa#0fd#0ff
#f0d#d0a#a08#806#600#660#680#6a0#6d0#6f0#6f6#6f8#6fa#6fd#6ff#0df
#f0a#d08#a06#800#860#880#8a0#8d0#8f0#8f6#8f8#8fa#8fd#8ff#6df#0af
#f08#d06#a00#a60#a80#aa0#ad0#af0#af6#af8#afa#afd#aff#8df#6af#08f
#f06#d00#d60#d80#da0#dd0#df0#df6#df8#dfa#dfd#dff#adf#8af#68f#06f
#f00#f60#f80#fa0#fd0#ff0#ff6#ff8#ffa#ffd#fff#ddf#aaf#88f#66f#00f
#fd0#fd6#fd8#fda#fdd#fdf#daf#a8f#86f#60f
#66d#68d#6ad#6dd #fa0#fa6#fa8#faa#fad#faf#d8f#a6f#80f
#86d#66a#68a#6aa#6da #f80#f86#f88#f8a#f8d#f8f#d6f#a0f
#a6d#86a#668#688#6a8#6d8 #f60#f66#f68#f6a#f6d#f6f#d0f
#d6d#a6a#868#666#686#6a6#6d6#6d8#6da#6dd #f00#f06#f08#f0a#f0d#f0f
#d6a#a68#866#886#8a6#8d6#8d8#8da#8dd#6ad
#d68#a66#a86#aa6#ad6#ad8#ada#add#8ad#68d
#d66#d86#da6#dd6#dd8#dda#ddd#aad#88d#66d g78_g82_g85_g89_g93_g100
#da6#da8#daa#dad#a8d#86d g52_g58_g62_g66_g70_g74_
#88a#8aa #d86#d88#d8a#d8d#a6d g27_g31_g35_g38_g42_g46_g50_
#a8a#888#8a8#8aa #d66#d68#d6a#d6d g0__g3__g7__g11_g15_g19_g23_
#a88#aa8#aaa#88a
#a88#a8a
"""
CHART_88 = """
brown__ dark_red_ dark_magenta_ dark_blue_ dark_cyan_ dark_green_
yellow_ light_red light_magenta light_blue light_cyan light_green
#00f#08f#0cf#0ff black_______ dark_gray___
#80f#00c#08c#0cc#0fc light_gray__ white_______
#c0f#80c#008#088#0c8#0f8
#f0f#c0c#808#000#080#0c0#0f0#0f8#0fc#0ff #88c#8cc
#f0c#c08#800#880#8c0#8f0#8f8#8fc#8ff#0cf #c8c#888#8c8#8cc
#f08#c00#c80#cc0#cf0#cf8#cfc#cff#8cf#08f #c88#cc8#ccc#88c
#f00#f80#fc0#ff0#ff8#ffc#fff#ccf#88f#00f #c88#c8c
#fc0#fc8#fcc#fcf#c8f#80f
#f80#f88#f8c#f8f#c0f g62_g74_g82_g89_g100
#f00#f08#f0c#f0f g0__g19_g35_g46_g52
"""
CHART_16 = """
brown__ dark_red_ dark_magenta_ dark_blue_ dark_cyan_ dark_green_
yellow_ light_red light_magenta light_blue light_cyan light_green
black_______ dark_gray___ light_gray__ white_______
"""
ATTR_RE = re.compile("(?P<whitespace>[ \n]*)(?P<entry>[^ \n]+)")
SHORT_ATTR = 4 # length of short high-colour descriptions which may
# be packed one after the next
def parse_chart(chart, convert):
"""
Convert string chart into text markup with the correct attributes.
chart -- palette chart as a string
convert -- function that converts a single palette entry to an
(attr, text) tuple, or None if no match is found
"""
out = []
for match in re.finditer(ATTR_RE, chart):
if match.group('whitespace'):
out.append(match.group('whitespace'))
entry = match.group('entry')
entry = entry.replace("_", " ")
while entry:
# try the first four characters
attrtext = convert(entry[:SHORT_ATTR])
if attrtext:
elen = SHORT_ATTR
entry = entry[SHORT_ATTR:].strip()
else: # try the whole thing
attrtext = convert(entry.strip())
assert attrtext, "Invalid palette entry: %r" % entry
elen = len(entry)
entry = ""
attr, text = attrtext
out.append((attr, text.ljust(elen)))
return out
def foreground_chart(chart, background, colors):
"""
Create text markup for a foreground colour chart
chart -- palette chart as string
background -- colour to use for background of chart
colors -- number of colors (88 or 256)
"""
def convert_foreground(entry):
try:
attr = urwid.AttrSpec(entry, background, colors)
except urwid.AttrSpecError:
return None
return attr, entry
return parse_chart(chart, convert_foreground)
def background_chart(chart, foreground, colors):
"""
Create text markup for a background colour chart
chart -- palette chart as string
foreground -- colour to use for foreground of chart
colors -- number of colors (88 or 256)
This will remap 8 <= colour < 16 to high-colour versions
in the hopes of greater compatibility
"""
def convert_background(entry):
try:
attr = urwid.AttrSpec(foreground, entry, colors)
except urwid.AttrSpecError:
return None
# fix 8 <= colour < 16
if colors > 16 and attr.background_basic and \
attr.background_number >= 8:
# use high-colour with same number
entry = 'h%d' % attr.background_number
attr = urwid.AttrSpec(foreground, entry, colors)
return attr, entry
return parse_chart(chart, convert_background)
def main():
palette = [
('header', 'black,underline', 'light gray', 'standout,underline',
'black,underline', '#88a'),
('panel', 'light gray', 'dark blue', '',
'#ffd', '#00a'),
('focus', 'light gray', 'dark cyan', 'standout',
'#ff8', '#806'),
]
screen = urwid.raw_display.Screen()
screen.register_palette(palette)
lb = urwid.SimpleListWalker([])
chart_offset = None # offset of chart in lb list
mode_radio_buttons = []
chart_radio_buttons = []
def fcs(widget):
# wrap widgets that can take focus
return urwid.AttrMap(widget, None, 'focus')
def set_mode(colors, is_foreground_chart):
# set terminal mode and redraw chart
screen.set_terminal_properties(colors)
chart_fn = (background_chart, foreground_chart)[is_foreground_chart]
if colors == 1:
lb[chart_offset] = urwid.Divider()
else:
chart = {16: CHART_16, 88: CHART_88, 256: CHART_256}[colors]
txt = chart_fn(chart, 'default', colors)
lb[chart_offset] = urwid.Text(txt, wrap='clip')
def on_mode_change(rb, state, colors):
# if this radio button is checked
if state:
is_foreground_chart = chart_radio_buttons[0].state
set_mode(colors, is_foreground_chart)
def mode_rb(text, colors, state=False):
# mode radio buttons
rb = urwid.RadioButton(mode_radio_buttons, text, state)
urwid.connect_signal(rb, 'change', on_mode_change, colors)
return fcs(rb)
def on_chart_change(rb, state):
# handle foreground check box state change
set_mode(screen.colors, state)
def click_exit(button):
raise urwid.ExitMainLoop()
lb.extend([
urwid.AttrMap(urwid.Text("Urwid Palette Test"), 'header'),
urwid.AttrMap(urwid.Columns([
urwid.Pile([
mode_rb("Monochrome", 1),
mode_rb("16-Color", 16, True),
mode_rb("88-Color", 88),
mode_rb("256-Color", 256)]),
urwid.Pile([
fcs(urwid.RadioButton(chart_radio_buttons,
"Foreground Colors", True, on_chart_change)),
fcs(urwid.RadioButton(chart_radio_buttons,
"Background Colors")),
urwid.Divider(),
fcs(urwid.Button("Exit", click_exit)),
]),
]), 'panel')
])
chart_offset = len(lb)
lb.extend([
urwid.Divider() # placeholder for the chart
])
set_mode(16, True) # displays the chart
def unhandled_input(key):
if key in ('Q', 'q', 'esc'):
raise urwid.ExitMainLoop()
urwid.MainLoop(urwid.ListBox(lb), screen=screen,
unhandled_input=unhandled_input).run()
if __name__ == "__main__":
main()
|
