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#------------------------------------------------------------------------------
#
# Copyright (c) 2008, 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: 01/10/2006
#
#------------------------------------------------------------------------------
""" Defines the array editor factory for all traits toolkit backends.
"""
#-------------------------------------------------------------------------------
# Imports:
#-------------------------------------------------------------------------------
from __future__ import absolute_import
import numpy
from traits.api import Bool, HasTraits, Int, Float, Instance, false, TraitError
from ..editor import Editor
from ..editor_factory import EditorFactory
# CIRCULAR IMPORT FIXME: Importing from the source rather than traits.ui.api
# to avoid circular imports, as this EditorFactory will be part of
# traits.ui.api as well.
from ..view import View
from ..group import Group
from ..item import Item
#-------------------------------------------------------------------------------
# 'ToolkitEditorFactory' class:
#-------------------------------------------------------------------------------
class ToolkitEditorFactory ( EditorFactory ):
""" Editor factory for array editors.
"""
#---------------------------------------------------------------------------
# Trait definitions:
#---------------------------------------------------------------------------
# Width of the individual fields
width = Int( -80 )
# Is user input set on every keystroke?
auto_set = Bool( True )
# Is user input set when the Enter key is pressed?
enter_set = Bool( False )
#-------------------------------------------------------------------------------
# 'ArrayStructure' class:
#-------------------------------------------------------------------------------
class ArrayStructure ( HasTraits ):
#---------------------------------------------------------------------------
# Trait definitions:
#---------------------------------------------------------------------------
# Editor that this structure is linked to
editor = Instance( Editor )
# The constructed View for the array
view = Instance( View )
#---------------------------------------------------------------------------
# Initializes the object:
#---------------------------------------------------------------------------
def __init__ ( self, editor ):
""" Initializes the object.
"""
# Save the reference to the editor:
self.editor = editor
# Set up the field width for each item:
width = editor.factory.width
# Set up the correct style for each filed:
style = 'simple'
if editor.readonly:
style = 'readonly'
# Get the array we are mirroring:
object = editor.value
# Determine the correct trait type to use for each element:
trait = Float
if object.dtype.type == 'i':
trait = Int
if len( object.shape ) == 1:
self.view = self._one_dim_view( object, style, width, trait )
elif len( object.shape ) == 2:
self.view = self._two_dim_view( object, style, width, trait )
else:
raise TraitError( 'Only 1D or 2D arrays supported' )
#---------------------------------------------------------------------------
# 1D view:
#---------------------------------------------------------------------------
def _one_dim_view ( self, object, style, width, trait ):
content = []
shape = object.shape
items = []
format_func = self.editor.factory.format_func
format_str = self.editor.factory.format_str
for i in range( shape[0] ):
name = 'f%d' % i
self.add_trait( name,
trait( object[i],
event = 'field',
auto_set = self.editor.factory.auto_set,
enter_set = self.editor.factory.enter_set )
)
items.append( Item( name = name,
style = style,
width = width,
format_func = format_func,
format_str = format_str,
padding = -3 ) )
group = Group( orientation = 'horizontal',
show_labels = False,
*items )
content.append( group )
return View( Group( show_labels = False, *content ) )
#---------------------------------------------------------------------------
# 2D view:
#---------------------------------------------------------------------------
def _two_dim_view ( self, object, style, width, trait ):
content = []
shape = object.shape
format_func = self.editor.factory.format_func
format_str = self.editor.factory.format_str
for i in range( shape[0] ):
items = []
for j in range( shape[1] ):
name = 'f%d_%d' % ( i, j )
self.add_trait( name,
trait( object[i, j],
event = 'field',
auto_set = self.editor.factory.auto_set,
enter_set = self.editor.factory.enter_set )
)
items.append( Item( name = name,
style = style,
width = width,
format_func = format_func,
format_str = format_str,
padding = -3 ) )
group = Group( orientation = 'horizontal',
show_labels = False,
*items )
content.append( group )
return View( Group( show_labels = False, *content ) )
#---------------------------------------------------------------------------
# Updates the underlying tuple when any field changes value:
#---------------------------------------------------------------------------
def _field_changed ( self ):
""" Updates the underlying array when any field changes value.
"""
if not self.editor._busy:
# Get the array we are mirroring:
object = self.editor.value
shape = object.shape
value = numpy.zeros( shape, object.dtype )
# 1D
if len( shape ) == 1:
for i in range( shape[0] ):
value[i] = getattr( self, 'f%d' % i )
# 2D
elif len( shape ) == 2:
for i in range( shape[0] ):
for j in range( shape[1] ):
value[i,j] = getattr( self, 'f%d_%d' % ( i, j ) )
self.editor.update_array( value )
#-------------------------------------------------------------------------------
# Toolkit-independent 'SimpleEditor' class:
#-------------------------------------------------------------------------------
class SimpleEditor ( Editor ):
""" Simple style of editor for arrays.
"""
#---------------------------------------------------------------------------
# Trait definitions:
#---------------------------------------------------------------------------
# Is the editor read-only?
readonly = false
#---------------------------------------------------------------------------
# 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._as = _as = ArrayStructure( self )
ui = _as.view.ui( _as, parent, kind = 'subpanel' )
ui.parent = self.ui
self.control = ui.control
#---------------------------------------------------------------------------
# Updates the editor when the object trait changes external to the editor:
#---------------------------------------------------------------------------
def update_editor ( self ):
""" Updates the editor when the object trait changes externally to the
editor.
"""
if not self._busy:
self._busy = True
object = self.value
shape = object.shape
_as = self._as
# 1D
if len( shape ) == 1:
for i in range( shape[0] ):
setattr( _as, 'f%d' % i, object[i] )
# 2D
elif len( shape ) == 2:
for i in range( shape[0] ):
for j in range( shape[1] ):
setattr( _as, 'f%d_%d' % ( i, j ), object[i,j] )
self._busy=False
#---------------------------------------------------------------------------
# Updates the array value associated with the editor:
#---------------------------------------------------------------------------
def update_array ( self, value ):
""" Updates the array value associated with the editor.
"""
self._busy = True
self.value = value
self._busy = False
# Define the ArrayEditor class
ArrayEditor = ToolkitEditorFactory
### EOF ---------------------------------------------------------------------
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