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0604d72318
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.
105 lines
3.2 KiB
Python
105 lines
3.2 KiB
Python
"""Switchboard class.
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This class is used to coordinate updates among all Viewers. Every Viewer must
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conform to the following interface:
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- it must include a method called update_yourself() which takes three
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arguments; the red, green, and blue values of the selected color.
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- When a Viewer selects a color and wishes to update all other Views, it
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should call update_views() on the Switchboard object. Not that the
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Viewer typically does *not* update itself before calling update_views(),
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since this would cause it to get updated twice.
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"""
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import sys
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from types import DictType
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import marshal
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class Switchboard:
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def __init__(self, initfile):
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self.__initfile = initfile
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self.__colordb = None
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self.__optiondb = {}
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self.__views = []
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self.__red = 0
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self.__green = 0
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self.__blue = 0
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self.__canceled = 0
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# read the initialization file
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fp = None
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if initfile:
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try:
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try:
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fp = open(initfile)
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self.__optiondb = marshal.load(fp)
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if type(self.__optiondb) <> DictType:
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sys.stderr.write(
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'Problem reading options from file: %s\n' %
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initfile)
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self.__optiondb = {}
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except (IOError, EOFError):
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pass
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finally:
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if fp:
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fp.close()
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def add_view(self, view):
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self.__views.append(view)
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def update_views(self, red, green, blue):
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self.__red = red
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self.__green = green
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self.__blue = blue
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for v in self.__views:
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v.update_yourself(red, green, blue)
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def update_views_current(self):
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self.update_views(self.__red, self.__green, self.__blue)
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def current_rgb(self):
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return self.__red, self.__green, self.__blue
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def colordb(self):
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return self.__colordb
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def set_colordb(self, colordb):
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self.__colordb = colordb
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def optiondb(self):
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return self.__optiondb
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def save_views(self):
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# save the current color
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self.__optiondb['RED'] = self.__red
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self.__optiondb['GREEN'] = self.__green
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self.__optiondb['BLUE'] = self.__blue
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for v in self.__views:
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if hasattr(v, 'save_options'):
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v.save_options(self.__optiondb)
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# save the name of the file used for the color database. we'll try to
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# load this first.
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self.__optiondb['DBFILE'] = self.__colordb.filename()
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fp = None
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try:
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try:
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fp = open(self.__initfile, 'w')
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except IOError:
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sys.stderr.write('Cannot write options to file: %s\n' %
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self.__initfile)
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else:
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marshal.dump(self.__optiondb, fp)
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finally:
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if fp:
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fp.close()
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def withdraw_views(self):
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for v in self.__views:
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if hasattr(v, 'withdraw'):
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v.withdraw()
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def canceled(self, flag=1):
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self.__canceled = flag
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def canceled_p(self):
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return self.__canceled
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