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Lots of changes to support loading alternative color name database. 

You can switch database by just loading the new one; the list window
and nearest colors adapt to the new database.

Some reorganizing of code.  Also, the name of the database file is
stored in the ~/.pynche pickle.  If it can't be loaded, fallbacks are
used.
This commit is contained in:
Barry Warsaw 1999-04-26 23:17:16 +00:00
parent 0ec1493d0b
commit 0604d72318
6 changed files with 191 additions and 89 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
Tools/pynche/ChipViewer.py
View File

@ -49,9 +49,9 @@ class ChipWidget:
if releasecmd:
self.__chip.bind('<ButtonRelease-1>', releasecmd)
def set_color(self, color):
def set_color(self, color, colorname=None):
self.__chip.config(background=color)
self.__name.config(text=color)
self.__name.config(text=colorname or color)
def get_color(self):
return self.__chip['background']
@ -83,25 +83,27 @@ class ChipViewer:
releasecmd = self.__buttonrelease)
def update_yourself(self, red, green, blue):
# TBD: should exactname default to X11 color name if their is an exact
# match for the rgb triplet? Part of me says it's nice to see both
# names for the color, the other part says that it's better to
# feedback the exact match.
# Selected always shows the #rrggbb name of the color, nearest always
# shows the name of the nearest color in the database. TBD: should
# an exact match be indicated in some way?
#
# Always use the #rrggbb style to actually set the color, since we may
# not be using X color names (e.g. "web-safe" names)
colordb = self.__sb.colordb()
rgbtuple = (red, green, blue)
try:
allcolors = self.__sb.colordb().find_byrgb(rgbtuple)
exactname = allcolors[0]
except ColorDB.BadColor:
exactname = ColorDB.triplet_to_rrggbb(rgbtuple)
nearest = self.__sb.colordb().nearest(red, green, blue)
self.__selected.set_color(exactname)
self.__nearest.set_color(nearest)
rrggbb = ColorDB.triplet_to_rrggbb(rgbtuple)
# find the nearest
nearest = colordb.nearest(red, green, blue)
nearest_tuple = colordb.find_byname(nearest)
nearest_rrggbb = ColorDB.triplet_to_rrggbb(nearest_tuple)
self.__selected.set_color(rrggbb)
self.__nearest.set_color(nearest_rrggbb, nearest)
def __buttonpress(self, event=None):
self.__nearest.press()
def __buttonrelease(self, event=None):
self.__nearest.release()
colorname = self.__nearest.get_color()
red, green, blue = self.__sb.colordb().find_byname(colorname)
rrggbb = self.__nearest.get_color()
red, green, blue = ColorDB.rrggbb_to_triplet(rrggbb)
self.__sb.update_views(red, green, blue)

101
Tools/pynche/ColorDB.py
View File

@ -35,7 +35,9 @@ DEFAULT_DB = None
# generic class
class ColorDB:
def __init__(self, fp, lineno):
def __init__(self, fp):
lineno = 2
self.__name = fp.name
# Maintain several dictionaries for indexing into the color database.
# Note that while Tk supports RGB intensities of 4, 8, 12, or 16 bits,
# for now we only support 8 bit intensities. At least on OpenWindows,
@ -54,6 +56,7 @@ class ColorDB:
if not line:
break
# get this compiled regular expression from derived class
## print '%3d: %s' % (lineno, line[:-1])
mo = self._re.match(line)
if not mo:
sys.stderr.write('Error in %s, line %d\n' % (fp.name, lineno))
@ -62,9 +65,10 @@ class ColorDB:
#
# extract the red, green, blue, and name
#
red, green, blue = map(int, mo.group('red', 'green', 'blue'))
name = mo.group('name')
red, green, blue = self._extractrgb(mo)
name = self._extractname(mo)
keyname = string.lower(name)
## print keyname, '(%d, %d, %d)' % (red, green, blue)
#
# TBD: for now the `name' is just the first named color with the
# rgb values we find. Later, we might want to make the two word
@ -81,13 +85,25 @@ class ColorDB:
self.__byname[keyname] = key
lineno = lineno + 1
# override in derived classes
def _extractrgb(self, mo):
return map(int, mo.group('red', 'green', 'blue'))
def _extractname(self, mo):
return mo.group('name')
def filename(self):
return self.__name
def find_byrgb(self, rgbtuple):
"""Return name for rgbtuple"""
try:
return self.__byrgb[rgbtuple]
except KeyError:
raise BadColor(rgbtuple)
def find_byname(self, name):
"""Return (red, green, blue) for name"""
name = string.lower(name)
try:
return self.__byname[name]
@ -95,9 +111,10 @@ class ColorDB:
raise BadColor(name)
def nearest(self, red, green, blue):
# TBD: use Voronoi diagrams, Delaunay triangulation, or octree for
# speeding up the locating of nearest point. Exhaustive search is
# inefficient, but may be fast enough.
"""Return the name of color nearest (red, green, blue)"""
# TBD: should we use Voronoi diagrams, Delaunay triangulation, or
# octree for speeding up the locating of nearest point? Exhaustive
# search is inefficient, but seems fast enough.
nearest = -1
nearest_name = ''
for name, aliases in self.__byrgb.values():
@ -133,7 +150,29 @@ class ColorDB:
class RGBColorDB(ColorDB):
_re = re.compile(
'\s*(?P<red>\d+)\s+(?P<green>\d+)\s+(?P<blue>\d+)\s+(?P<name>.*)')
'\s*(?P<red>\d+)\s+(?P<green>\d+)\s+(?P<blue>\d+)\s+(?P<name>.*)')
class HTML40DB(ColorDB):
_re = re.compile('(?P<name>\S+)\s+(?P<hexrgb>#[0-9a-fA-F]{6})')
def _extractrgb(self, mo):
return rrggbb_to_triplet(mo.group('hexrgb'))
class LightlinkDB(HTML40DB):
_re = re.compile('(?P<name>(.+))\s+(?P<hexrgb>#[0-9a-fA-F]{6})')
def _extractname(self, mo):
return string.strip(mo.group('name'))
class WebsafeDB(ColorDB):
_re = re.compile('(?P<hexrgb>#[0-9a-fA-F]{6})')
def _extractrgb(self, mo):
return rrggbb_to_triplet(mo.group('hexrgb'))
def _extractname(self, mo):
return string.upper(mo.group('hexrgb'))
@ -141,30 +180,36 @@ class RGBColorDB(ColorDB):
# expression, SCANLINES is the number of header lines to scan, and CLASS is
# the class to instantiate if a match is found
X_RGB_TXT = re.compile('XConsortium'), 1, RGBColorDB
FILETYPES = [
(re.compile('XConsortium'), RGBColorDB),
(re.compile('HTML'), HTML40DB),
(re.compile('lightlink'), LightlinkDB),
(re.compile('Websafe'), WebsafeDB),
]
def get_colordb(file, filetype=X_RGB_TXT):
def get_colordb(file, filetype=None):
colordb = None
fp = None
typere, scanlines, class_ = filetype
fp = open(file)
try:
try:
lineno = 0
fp = open(file)
while lineno < scanlines:
line = fp.readline()
if not line:
break
mo = typere.search(line)
if mo:
colordb = class_(fp, lineno)
break
lineno = lineno + 1
except IOError:
pass
line = fp.readline()
if not line:
return None
# try to determine the type of RGB file it is
if filetype is None:
filetypes = FILETYPES
else:
filetypes = [filetype]
for typere, class_ in filetypes:
mo = typere.search(line)
if mo:
break
else:
# no matching type
return None
# we know the type and the class to grok the type, so suck it in
colordb = class_(fp)
finally:
if fp:
fp.close()
fp.close()
# save a global copy
global DEFAULT_DB
DEFAULT_DB = colordb
@ -175,6 +220,7 @@ def get_colordb(file, filetype=X_RGB_TXT):
_namedict = {}
def rrggbb_to_triplet(color, atoi=string.atoi):
"""Converts a #rrggbb color to the tuple (red, green, blue)."""
global _namedict
rgbtuple = _namedict.get(color)
if rgbtuple is None:
if color[0] <> '#':
@ -190,6 +236,7 @@ def rrggbb_to_triplet(color, atoi=string.atoi):
_tripdict = {}
def triplet_to_rrggbb(rgbtuple):
"""Converts a (red, green, blue) tuple to #rrggbb."""
global _tripdict
hexname = _tripdict.get(rgbtuple)
if hexname is None:
hexname = '#%02x%02x%02x' % rgbtuple

66
Tools/pynche/ListViewer.py
View File

@ -45,35 +45,7 @@ class ListViewer:
canvas.pack(fill=BOTH, expand=1)
canvas.configure(yscrollcommand=(self.__scrollbar, 'set'))
self.__scrollbar.configure(command=(canvas, 'yview'))
#
# create all the buttons
colordb = switchboard.colordb()
row = 0
widest = 0
bboxes = self.__bboxes = []
for name in colordb.unique_names():
exactcolor = ColorDB.triplet_to_rrggbb(colordb.find_byname(name))
canvas.create_rectangle(5, row*20 + 5,
20, row*20 + 20,
fill=exactcolor)
textid = canvas.create_text(25, row*20 + 13,
text=name,
anchor=W)
x1, y1, textend, y2 = canvas.bbox(textid)
boxid = canvas.create_rectangle(3, row*20+3,
textend+3, row*20 + 23,
outline='',
tags=(exactcolor,))
canvas.bind('<ButtonRelease>', self.__onrelease)
bboxes.append(boxid)
if textend+3 > widest:
widest = textend+3
row = row + 1
canvheight = (row-1)*20 + 25
canvas.config(scrollregion=(0, 0, 150, canvheight))
for box in bboxes:
x1, y1, x2, y2 = canvas.coords(box)
canvas.coords(box, x1, y1, widest, y2)
self.__populate()
#
# Update on click
self.__uoc = BooleanVar()
@ -91,6 +63,38 @@ class ListViewer:
selectmode=BROWSE)
self.__aliases.pack(expand=1, fill=BOTH)
def __populate(self):
#
# create all the buttons
colordb = self.__sb.colordb()
canvas = self.__canvas
row = 0
widest = 0
bboxes = self.__bboxes = []
for name in colordb.unique_names():
exactcolor = ColorDB.triplet_to_rrggbb(colordb.find_byname(name))
canvas.create_rectangle(5, row*20 + 5,
20, row*20 + 20,
fill=exactcolor)
textid = canvas.create_text(25, row*20 + 13,
text=name,
anchor=W)
x1, y1, textend, y2 = canvas.bbox(textid)
boxid = canvas.create_rectangle(3, row*20+3,
textend+3, row*20 + 23,
outline='',
tags=(exactcolor, 'all'))
canvas.bind('<ButtonRelease>', self.__onrelease)
bboxes.append(boxid)
if textend+3 > widest:
widest = textend+3
row = row + 1
canvheight = (row-1)*20 + 25
canvas.config(scrollregion=(0, 0, 150, canvheight))
for box in bboxes:
x1, y1, x2, y2 = canvas.coords(box)
canvas.coords(box, x1, y1, widest, y2)
def __onrelease(self, event=None):
canvas = self.__canvas
# find the current box
@ -164,3 +168,7 @@ class ListViewer:
def save_options(self, optiondb):
optiondb['UPONCLICK'] = self.__uoc.get()
def flush(self):
self.__canvas.delete('all')
self.__populate()

34
Tools/pynche/Main.py
View File

@ -49,7 +49,7 @@ Where:
"""
__version__ = '0.1'
__version__ = '0.2'
import sys
import os
@ -120,19 +120,27 @@ def initial_color(s, colordb):
def build(master=None, initialcolor=None, initfile=None, ignore=None):
# create the windows and go
for f in RGB_TXT:
try:
colordb = ColorDB.get_colordb(f)
if colordb:
break
except IOError:
pass
else:
usage(1, 'No color database file found, see the -d option.')
# create all output widgets
s = Switchboard(colordb, not ignore and initfile)
s = Switchboard(not ignore and initfile)
# load the color database
colordb = None
try:
dbfile = s.optiondb()['DBFILE']
colordb = ColorDB.get_colordb(dbfile)
except (KeyError, IOError):
# scoot through the files listed above to try to find a usable color
# database file
for f in RGB_TXT:
try:
colordb = ColorDB.get_colordb(f)
if colordb:
break
except IOError:
pass
if not colordb:
usage(1, 'No color database file found, see the -d option.')
s.set_colordb(colordb)
# create the application window decorations
app = PyncheWidget(__version__, s, master=master)

35
Tools/pynche/PyncheWidget.py
View File

@ -23,6 +23,7 @@ class PyncheWidget:
self.__listwin = None
self.__detailswin = None
self.__helpwin = None
self.__dialogstate = {}
modal = self.__modal = not not master
# If a master was given, we are running as a modal dialog servant to
# some other application. We rearrange our UI in this case (there's
@ -51,8 +52,11 @@ class PyncheWidget:
#
# File menu
#
filemenu = self.__filemenu = Menu(menubar, tearoff=0)
filemenu.add_command(label='Load palette...',
command=self.__load,
underline=0)
if not modal:
filemenu = self.__filemenu = Menu(menubar, tearoff=0)
filemenu.add_command(label='Quit',
command=self.__quit,
accelerator='Alt-Q',
@ -66,7 +70,7 @@ class PyncheWidget:
underline=0)
viewmenu.add_command(label='Color List Window...',
command=self.__popup_listwin,
underline=0)
underline=6)
viewmenu.add_command(label='Details Window...',
command=self.__popup_details,
underline=0)
@ -186,6 +190,33 @@ email: bwarsaw@python.org''' % __version__)
self.__sb.add_view(self.__detailswin)
self.__detailswin.deiconify()
def __load(self, event=None):
import FileDialog
import ColorDB
while 1:
d = FileDialog.FileDialog(self.__root)
file = d.go(pattern='*.txt', key=self.__dialogstate)
if file is None:
# cancel button
return
try:
colordb = ColorDB.get_colordb(file)
except IOError:
tkMessageBox.showerror('Read error', '''\
Could not open file for reading:
%s''' % file)
continue
if colordb is None:
tkMessageBox.showerror('Unrecognized color file type', '''\
Unrecognized color file type in file:
%s''' % file)
continue
break
self.__sb.set_colordb(colordb)
if self.__listwin:
self.__listwin.flush()
self.__sb.update_views_current()
def withdraw(self):
self.__root.withdraw()

10
Tools/pynche/Switchboard.py
View File

@ -17,9 +17,9 @@ from types import DictType
import marshal
class Switchboard:
def __init__(self, colordb, initfile):
def __init__(self, initfile):
self.__initfile = initfile
self.__colordb = colordb
self.__colordb = None
self.__optiondb = {}
self.__views = []
self.__red = 0
@ -63,6 +63,9 @@ class Switchboard:
def colordb(self):
return self.__colordb
def set_colordb(self, colordb):
self.__colordb = colordb
def optiondb(self):
return self.__optiondb
@ -74,6 +77,9 @@ class Switchboard:
for v in self.__views:
if hasattr(v, 'save_options'):
v.save_options(self.__optiondb)
# save the name of the file used for the color database. we'll try to
# load this first.
self.__optiondb['DBFILE'] = self.__colordb.filename()
fp = None
try:
try: