/usr/lib/python2.7/dist-packages/traitsui/qt4/text_editor.py is in python-traitsui 4.4.0-1.3.
This file is owned by root:root, with mode 0o644.
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# Copyright (c) 2007, Riverbank Computing Limited
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD license.
# However, when used with the GPL version of PyQt the additional terms described in the PyQt GPL exception also apply
#
# Author: Riverbank Computing Limited
#------------------------------------------------------------------------------
""" Defines the various text editors for the PyQt user interface toolkit.
"""
#-------------------------------------------------------------------------------
# Imports:
#-------------------------------------------------------------------------------
from pyface.qt import QtCore, QtGui
from traits.api \
import TraitError
# FIXME: ToolkitEditorFactory is a proxy class defined here just for backward
# compatibility. The class has been moved to the
# traitsui.editors.text_editor file.
from traitsui.editors.text_editor \
import evaluate_trait, ToolkitEditorFactory
from editor \
import Editor
from editor_factory \
import ReadonlyEditor as BaseReadonlyEditor
from constants \
import OKColor
#-------------------------------------------------------------------------------
# 'SimpleEditor' class:
#-------------------------------------------------------------------------------
class SimpleEditor ( Editor ):
""" Simple style text editor, which displays a text field.
"""
# Flag for window styles:
base_style = QtGui.QLineEdit
# Background color when input is OK:
ok_color = OKColor
#---------------------------------------------------------------------------
# Trait definitions:
#---------------------------------------------------------------------------
# Function used to evaluate textual user input:
evaluate = evaluate_trait
#---------------------------------------------------------------------------
# Finishes initializing the editor by creating the underlying toolkit
# widget:
#---------------------------------------------------------------------------
def init ( self, parent ):
""" Finishes initializing the editor by creating the underlying toolkit
widget.
"""
factory = self.factory
wtype = self.base_style
self.evaluate = factory.evaluate
self.sync_value(factory.evaluate_name, 'evaluate', 'from')
if not factory.multi_line or factory.is_grid_cell or factory.password:
wtype = QtGui.QLineEdit
multi_line = (wtype is not QtGui.QLineEdit)
if multi_line:
self.scrollable = True
control = wtype(self.str_value)
if factory.read_only:
control.setReadOnly(True)
if factory.password:
control.setEchoMode(QtGui.QLineEdit.Password)
if factory.auto_set and not factory.is_grid_cell:
if wtype == QtGui.QTextEdit:
QtCore.QObject.connect(control,
QtCore.SIGNAL('textChanged()'), self.update_object)
else:
QtCore.QObject.connect(control,
QtCore.SIGNAL('textEdited(QString)'), self.update_object)
else:
# Assume enter_set is set, otherwise the value will never get
# updated.
QtCore.QObject.connect(control, QtCore.SIGNAL('editingFinished()'),
self.update_object)
self.control = control
self.set_error_state( False )
self.set_tooltip()
#---------------------------------------------------------------------------
# Handles the user entering input data in the edit control:
#---------------------------------------------------------------------------
def update_object ( self ):
""" Handles the user entering input data in the edit control.
"""
if (not self._no_update) and (self.control is not None):
try:
self.value = self._get_user_value()
if self._error is not None:
self._error = None
self.ui.errors -= 1
self.set_error_state( False )
except TraitError, excp:
pass
#---------------------------------------------------------------------------
# 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.
"""
user_value = self._get_user_value()
try:
unequal = bool(user_value != self.value)
except ValueError:
# This might be a numpy array.
unequal = True
if unequal:
self._no_update = True
self.control.setText(self.str_value)
self._no_update = False
if self._error is not None:
self._error = None
self.ui.errors -= 1
self.set_error_state( False )
#---------------------------------------------------------------------------
# Gets the actual value corresponding to what the user typed:
#---------------------------------------------------------------------------
def _get_user_value ( self ):
""" Gets the actual value corresponding to what the user typed.
"""
try:
value = self.control.text()
except AttributeError:
value = self.control.toPlainText()
value = unicode(value)
try:
value = self.evaluate( value )
except:
pass
try:
ret = self.factory.mapping.get(value, value)
except TypeError:
# The value is probably not hashable.
ret = value
return ret
#---------------------------------------------------------------------------
# Handles an error that occurs while setting the object's trait value:
#---------------------------------------------------------------------------
def error ( self, excp ):
""" Handles an error that occurs while setting the object's trait value.
"""
if self._error is None:
self._error = True
self.ui.errors += 1
self.set_error_state( True )
#---------------------------------------------------------------------------
# Returns whether or not the editor is in an error state:
#---------------------------------------------------------------------------
def in_error_state ( self ):
""" Returns whether or not the editor is in an error state.
"""
return (self.invalid or self._error)
#-------------------------------------------------------------------------------
# 'CustomEditor' class:
#-------------------------------------------------------------------------------
class CustomEditor ( SimpleEditor ):
""" Custom style of text editor, which displays a multi-line text field.
"""
# FIXME: The wx version exposes a wx constant.
# Flag for window style. This value overrides the default.
base_style = QtGui.QTextEdit
#-------------------------------------------------------------------------------
# 'ReadonlyEditor' class:
#-------------------------------------------------------------------------------
class ReadonlyEditor ( BaseReadonlyEditor ):
""" Read-only style of text editor, which displays a read-only text field.
"""
def init(self, parent):
super(ReadonlyEditor, self).init(parent)
if self.factory.readonly_allow_selection:
flags = (self.control.textInteractionFlags() |
QtCore.Qt.TextSelectableByMouse)
self.control.setTextInteractionFlags(flags)
#---------------------------------------------------------------------------
# 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.
"""
new_value = self.str_value
if self.factory.password:
new_value = '*' * len(new_value)
self.control.setText(new_value)
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