Thuban/Model/base.py

# Copyright (c) 2001, 2002 by Intevation GmbH
# Authors:
# Bernhard Herzog <[email protected]>
#
# This program is free software under the GPL (>=v2)
# Read the file COPYING coming with Thuban for details.

"""
Various base classes that didn't fir elsewhere
"""

__version__ = "$Revision$"

from Thuban.Lib.connector import Publisher

from messages import TITLE_CHANGED

class TitledObject:

    """Mix-in class for objects that have titles"""

    def __init__(self, title):
        self.title = title

    def Title(self):
        return self.title

    def SetTitle(self, title):
        self.title = title
        self.issue(TITLE_CHANGED, self)


class Modifiable(Publisher):

    """Class for objects maintaining a modified flag."""

    def __init__(self):
        self.modified = 0

    def WasModified(self):
        """Return true if the layer was modified"""
        return self.modified

    def UnsetModified(self):
        """Unset the modified flag"""
        self.modified = 0

    def changed(self, channel = None, *args):
        """Set the modified flag and issue a message

        The message is issued on the channel given by channel with args
        as the arguments.

        Subclasses should call this method whenever anything has
        changed.
        """
        self.modified = 1
        if channel is not None:
            apply(self.issue, (channel, args))
1	bh	127	# Copyright (c) 2001, 2002 by Intevation GmbH
2	bh	6	# Authors:
3			# Bernhard Herzog <[email protected]>
4			#
5			# This program is free software under the GPL (>=v2)
6			# Read the file COPYING coming with Thuban for details.
7
8			"""
9			Various base classes that didn't fir elsewhere
10			"""
11
12			__version__ = "$Revision$"
13
14			from Thuban.Lib.connector import Publisher
15
16			from messages import TITLE_CHANGED
17
18			class TitledObject:
19
20			"""Mix-in class for objects that have titles"""
21
22			def __init__(self, title):
23			self.title = title
24
25			def Title(self):
26			return self.title
27
28			def SetTitle(self, title):
29			self.title = title
30			self.issue(TITLE_CHANGED, self)
31
32
33			class Modifiable(Publisher):
34
35			"""Class for objects maintaining a modified flag."""
36
37			def __init__(self):
38			self.modified = 0
39
40			def WasModified(self):
41			"""Return true if the layer was modified"""
42			return self.modified
43
44			def UnsetModified(self):
45			"""Unset the modified flag"""
46			self.modified = 0
47
48			def changed(self, channel = None, *args):
49	bh	127	"""Set the modified flag and issue a message
50
51			The message is issued on the channel given by channel with args
52			as the arguments.
53
54			Subclasses should call this method whenever anything has
55			changed.
56			"""
57	bh	6	self.modified = 1
58			if channel is not None:
59			apply(self.issue, (channel, args))
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