/usr/share/pyshared/traitsui/instance_choice.py is in python-traitsui 4.1.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# Copyright (c) 2005, Enthought, Inc.
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in enthought/LICENSE.txt and may be redistributed only
# under the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
# Thanks for using Enthought open source!
#
# Author: David C. Morrill
# Date: 08/25/2005
#
#------------------------------------------------------------------------------
""" Defines the various instance descriptors used by the instance editor and
instance editor factory classes.
"""
#-------------------------------------------------------------------------------
# Imports:
#-------------------------------------------------------------------------------
from __future__ import absolute_import
from traits.api import HasPrivateTraits, Str, Any, Dict, Tuple, Callable, Bool
from .ui_traits import AView
from .helper import user_name_for
#-------------------------------------------------------------------------------
# 'InstanceChoiceItem' class:
#-------------------------------------------------------------------------------
class InstanceChoiceItem ( HasPrivateTraits ):
#---------------------------------------------------------------------------
# Trait definitions:
#---------------------------------------------------------------------------
# User interface name for the item
name = Str
# View associated with this item
view = AView
# Does this item create new instances?
is_factory = Bool( False )
#---------------------------------------------------------------------------
# Returns the name of the item:
#---------------------------------------------------------------------------
def get_name ( self, object = None ):
""" Returns the name of the item.
"""
return self.name
#---------------------------------------------------------------------------
# Return the view associated with the object:
#---------------------------------------------------------------------------
def get_view ( self ):
""" Returns the view associated with the object.
"""
return self.view
#---------------------------------------------------------------------------
# Returns the object associated with the item:
#---------------------------------------------------------------------------
def get_object ( self ):
""" Returns the object associated with the item.
"""
raise NotImplementedError
#---------------------------------------------------------------------------
# Indicates whether a specified object is compatible with the item:
#---------------------------------------------------------------------------
def is_compatible ( self, object ):
""" Indicates whether a specified object is compatible with the item.
"""
raise NotImplementedError
#---------------------------------------------------------------------------
# Indicates whether the item can be selected by the user:
#---------------------------------------------------------------------------
def is_selectable ( self ):
""" Indicates whether the item can be selected by the user.
"""
return True
#---------------------------------------------------------------------------
# Indicates whether the item supports drag and drop:
#---------------------------------------------------------------------------
def is_droppable ( self ):
""" Indicates whether the item supports drag and drop.
"""
return False
#-------------------------------------------------------------------------------
# 'InstanceChoice' class:
#-------------------------------------------------------------------------------
class InstanceChoice ( InstanceChoiceItem ):
#---------------------------------------------------------------------------
# Trait definitions:
#---------------------------------------------------------------------------
# Object associated with the item
object = Any
# The name of the object trait containing its user interface name:
name_trait = Str( 'name' )
#---------------------------------------------------------------------------
# Returns the name of the item:
#---------------------------------------------------------------------------
def get_name ( self, object = None ):
""" Returns the name of the item.
"""
if self.name != '':
return self.name
name = getattr( self.object, self.name_trait, None )
if isinstance( name, basestring ):
return name
return user_name_for( self.object.__class__.__name__ )
#---------------------------------------------------------------------------
# Returns the object associated with the item:
#---------------------------------------------------------------------------
def get_object ( self ):
""" Returns the object associated with the item.
"""
return self.object
#---------------------------------------------------------------------------
# Indicates whether a specified object is compatible with the item:
#---------------------------------------------------------------------------
def is_compatible ( self, object ):
""" Indicates whether a specified object is compatible with the item.
"""
return (object is self.object)
#-------------------------------------------------------------------------------
# 'InstanceFactoryChoice' class:
#-------------------------------------------------------------------------------
class InstanceFactoryChoice ( InstanceChoiceItem ):
#---------------------------------------------------------------------------
# Trait definitions:
#---------------------------------------------------------------------------
# Indicates whether an instance compatible with this item can be dragged and
# dropped rather than created
droppable = Bool( False )
# Indicates whether the item can be selected by the user
selectable = Bool( True )
# A class (or other callable) that can be used to create an item compatible
# with this item
klass = Callable
# Tuple of arguments to pass to **klass** to create an instance
args = Tuple
# Dictionary of arguments to pass to **klass** to create an instance
kw_args = Dict( Str, Any )
# Does this item create new instances? This value overrides the default.
is_factory = True
#---------------------------------------------------------------------------
# Returns the name of the item:
#---------------------------------------------------------------------------
def get_name ( self, object = None ):
""" Returns the name of the item.
"""
if self.name != '':
return self.name
name = getattr( object, 'name', None )
if isinstance(name, basestring):
return name
if issubclass( type( self.klass ), type ):
klass = self.klass
else:
klass = self.get_object().__class__
return user_name_for( klass.__name__ )
#---------------------------------------------------------------------------
# Returns the object associated with the item:
#---------------------------------------------------------------------------
def get_object ( self ):
""" Returns the object associated with the item.
"""
return self.klass( *self.args, **self.kw_args )
#---------------------------------------------------------------------------
# Indicates whether the item supports drag and drop:
#---------------------------------------------------------------------------
def is_droppable ( self ):
""" Indicates whether the item supports drag and drop.
"""
return self.droppable
#---------------------------------------------------------------------------
# Indicates whether a specified object is compatible with the item:
#---------------------------------------------------------------------------
def is_compatible ( self, object ):
""" Indicates whether a specified object is compatible with the item.
"""
if issubclass( type( self.klass ), type ):
return isinstance( object, self.klass )
return isinstance( object, self.get_object().__class__ )
#---------------------------------------------------------------------------
# Indicates whether the item can be selected by the user:
#---------------------------------------------------------------------------
def is_selectable ( self ):
""" Indicates whether the item can be selected by the user.
"""
return self.selectable
#-------------------------------------------------------------------------------
# 'InstanceDropChoice' class:
#-------------------------------------------------------------------------------
class InstanceDropChoice ( InstanceFactoryChoice ):
#---------------------------------------------------------------------------
# Trait definitions:
#---------------------------------------------------------------------------
# Indicates whether an instance compatible with this item can be dragged and
# dropped rather than created . This value overrides the default.
droppable = True
# Indicates whether the item can be selected by the user. This value
# overrides the default.
selectable = False
# Does this item create new instances? This value overrides the default.
is_factory = False
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