Thuban/Model/base.py

# Copyright (c) 2001 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 mesage on the given channel
        with arguments args. Call this method whenever anything has
        changed in a layer"""
        self.modified = 1
        if channel is not None:
            apply(self.issue, (channel, args))
1	bh	6	# Copyright (c) 2001 by Intevation GmbH
2			# 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			"""Set the modified flag and issue a mesage on the given channel
50			with arguments args. Call this method whenever anything has
51			changed in a layer"""
52			self.modified = 1
53			if channel is not None:
54			apply(self.issue, (channel, args))
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