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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: 12/02/2004
# Description: Define the Tkinter implementation of the various enumeration
# editors and the enumeration editor factory.
#
# Symbols defined: ToolkitEditorFactory
#
#------------------------------------------------------------------------------
#-------------------------------------------------------------------------------
# Imports:
#-------------------------------------------------------------------------------
import tk
from string import ascii_lowercase
from editor import Editor
from editor_factory import EditorFactory
from enthought.traits.api import Any, Range, TraitError, CTrait, \
TraitHandler
from enthought.traits.ui.ui_traits import SequenceTypes
#-------------------------------------------------------------------------------
# 'ToolkitEditorFactory' class:
#-------------------------------------------------------------------------------
class ToolkitEditorFactory ( EditorFactory ):
#---------------------------------------------------------------------------
# Trait definitions:
#---------------------------------------------------------------------------
values = Any # Values to enumerate (can be a list, tuple, dict,
# or a CTrait or TraitHandler than is 'mapped')
cols = Range( 1, 20 ) # Number of columns to use when displayed as a grid
#---------------------------------------------------------------------------
# Performs any initialization needed after all constructor traits have
# been set:
#---------------------------------------------------------------------------
def init ( self ):
""" Performs any initialization needed after all constructor traits
have been set.
"""
values = self.values
type_values = type( values )
if type_values is dict:
data = [ ( str( n ), v ) for n, v in values.items() ]
data.sort( lambda x, y: cmp( x[0], y[0] ) )
col = data[0][0].find( ':' ) + 1
if col > 0:
data = [ ( n[ col: ], v ) for n, v in data ]
else:
if not type_values in SequenceTypes:
handler = values
if isinstance( handler, CTrait ):
handler = handler.handler
if not isinstance( handler, TraitHandler ):
raise TraitError, "Invalid value for 'values' specified"
if handler.is_mapped:
data = [ ( str( n ), n ) for n in handler.map.keys() ]
data.sort( lambda x, y: cmp( x[0], y[0] ) )
else:
data = [ ( str( v ), v ) for v in handler.values ]
else:
data = [ ( str( v ), v ) for v in values ]
self._names = [ x[0] for x in data ]
self._mapping = _mapping = {}
for name, value in data:
_mapping[ name ] = value
#---------------------------------------------------------------------------
# 'Editor' factory methods:
#---------------------------------------------------------------------------
def simple_editor ( self, ui, object, name, description, parent ):
return SimpleEditor( parent,
factory = self,
ui = ui,
object = object,
name = name,
description = description )
def custom_editor ( self, ui, object, name, description, parent ):
return CustomEditor( parent,
factory = self,
ui = ui,
object = object,
name = name,
description = description )
#-------------------------------------------------------------------------------
# 'SimpleEditor' class:
#-------------------------------------------------------------------------------
class SimpleEditor ( Editor ):
#---------------------------------------------------------------------------
# Finishes initializing the editor by creating the underlying toolkit
# widget:
#---------------------------------------------------------------------------
def init ( self, parent ):
""" Finishes initializing the editor by creating the underlying toolkit
widget.
"""
self.control = wx.Choice( parent, -1, wx.Point( 0, 0 ),
wx.Size( 100, 20 ), self.factory._names )
wx.EVT_CHOICE( parent, self.control.GetId(), self.update_object )
self.update_editor()
#---------------------------------------------------------------------------
# Handles the user selecting a new value from the combo box:
#---------------------------------------------------------------------------
def update_object ( self, event ):
""" Handles the user selecting a new value from the combo box.
"""
self.value = self.factory._mapping[ event.GetString() ]
#---------------------------------------------------------------------------
# Updates the editor when the object trait changes external to the editor:
#---------------------------------------------------------------------------
def update_editor ( self ):
""" Updates the editor when the object trait changes external to the
editor.
"""
try:
self.control.SetStringSelection( self.str_value )
except:
pass
#-------------------------------------------------------------------------------
# 'CustomEditor' class:
#-------------------------------------------------------------------------------
class CustomEditor ( Editor ):
#---------------------------------------------------------------------------
# Finishes initializing the editor by creating the underlying toolkit
# widget:
#---------------------------------------------------------------------------
def init ( self, parent ):
""" Finishes initializing the editor by creating the underlying toolkit
widget.
"""
# Create a panel to hold all of the radio buttons:
self.control = panel = wx.Panel( parent, -1 )
# Get the current trait value:
cur_name = self.str_value
# Create a sizer to manage the radio buttons:
names = self.factory._names
mapping = self.factory._mapping
n = len( names )
cols = self.factory.cols
rows = (n + cols - 1) / cols
incr = [ n / cols ] * cols
rem = n % cols
for i in range( cols ):
incr[i] += (rem > i)
incr[-1] = -(reduce( lambda x, y: x + y, incr[:-1], 0 ) - 1)
if cols > 1:
sizer = wx.GridSizer( 0, cols, 2, 4 )
else:
sizer = wx.BoxSizer( wx.VERTICAL )
# Add the set of all possible choices:
style = wx.RB_GROUP
index = 0
for i in range( rows ):
for j in range( cols ):
if n > 0:
name = label = names[ index ]
if label[:1] in ascii_lowercase:
label = label.capitalize()
control = wx.RadioButton( panel, -1, label, style = style )
control.value = mapping[ name ]
style = 0
control.SetValue( name == cur_name )
wx.EVT_RADIOBUTTON( panel, control.GetId(),
self.update_object )
self.set_tooltip( control )
index += incr[j]
n -= 1
else:
control = wx.RadioButton( panel, -1, '' )
control.value = ''
control.Show( False )
sizer.Add( control, 0, wx.NORTH, 5 )
# Set-up the layout:
panel.SetAutoLayout( True )
panel.SetSizer( sizer )
sizer.Fit( panel )
#---------------------------------------------------------------------------
# Handles the user clicking one of the 'custom' radio buttons:
#---------------------------------------------------------------------------
def update_object ( self, event ):
""" Handles the user clicking one of the 'custom' radio buttons.
"""
self.value = event.GetEventObject().value
#---------------------------------------------------------------------------
# Updates the editor when the object trait changes external to the editor:
#---------------------------------------------------------------------------
def update_editor ( self ):
""" Updates the editor when the object trait changes external to the
editor.
"""
value = self.value
for button in self.control.GetChildren():
button.SetValue( button.value == value )
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