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# (C) Copyright 2008-2023 Enthought, Inc., Austin, TX
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in 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!
# ------------------------------------------------------------------------------
# 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 base PyQt classes the various styles of editors used in a
Traits-based user interface.
"""
from pyface.qt import QtCore, QtGui
from traits.api import TraitError
from .editor import Editor
class SimpleEditor(Editor):
"""Base class for simple style editors, which displays a text field
containing the text representation of the object trait value. Clicking in
the text field displays an editor-specific dialog box for changing the
value.
"""
def init(self, parent):
"""Finishes initializing the editor by creating the underlying toolkit
widget.
"""
self.control = _SimpleField(self)
self.set_tooltip()
# -------------------------------------------------------------------------
# Invokes the pop-up editor for an object trait:
#
# (Normally overridden in a subclass)
# -------------------------------------------------------------------------
def popup_editor(self):
"""Invokes the pop-up editor for an object trait."""
pass
class TextEditor(Editor):
"""Base class for text style editors, which displays an editable text
field, containing a text representation of the object trait value.
"""
def init(self, parent):
"""Finishes initializing the editor by creating the underlying toolkit
widget.
"""
self.control = QtGui.QLineEdit(self.str_value)
self.control.editingFinished.connect(self.update_object)
self.set_tooltip()
def dispose(self):
"""Disposes of the contents of an editor."""
if self.control is not None:
self.control.editingFinished.disconnect(self.update_object)
super().dispose()
def update_object(self):
"""Handles the user changing the contents of the edit control."""
if self.control is None:
return
try:
self.value = str(self.control.text())
except TraitError as excp:
pass
class ReadonlyEditor(Editor):
"""Base class for read-only style editors, which displays a read-only text
field, containing a text representation of the object trait value.
"""
# -------------------------------------------------------------------------
# Finishes initializing the editor by creating the underlying toolkit
# widget:
# -------------------------------------------------------------------------
text_alignment_map = {
"left": QtCore.Qt.AlignmentFlag.AlignLeft,
"right": QtCore.Qt.AlignmentFlag.AlignRight,
"just": QtCore.Qt.AlignmentFlag.AlignJustify,
"top": QtCore.Qt.AlignmentFlag.AlignLeft,
"bottom": QtCore.Qt.AlignmentFlag.AlignBottom,
"vcenter": QtCore.Qt.AlignmentFlag.AlignVCenter,
"hcenter": QtCore.Qt.AlignmentFlag.AlignHCenter,
"center": QtCore.Qt.AlignmentFlag.AlignVCenter | QtCore.Qt.AlignmentFlag.AlignHCenter,
}
def init(self, parent):
"""Finishes initializing the editor by creating the underlying toolkit
widget.
"""
self.control = QtGui.QLabel(self.str_value)
if self.item.resizable is True or self.item.height != -1.0:
self.control.setWordWrap(True)
alignment = None
for item in self.factory.text_alignment.split(","):
item_alignment = self.text_alignment_map.get(item, None)
if item_alignment:
if alignment:
alignment = alignment | item_alignment
else:
alignment = item_alignment
if alignment:
self.control.setAlignment(alignment)
self.set_tooltip()
def update_editor(self):
"""Updates the editor when the object trait changes externally to the
editor.
"""
self.control.setText(self.str_value)
class _SimpleField(QtGui.QLineEdit):
def __init__(self, editor):
QtGui.QLineEdit.__init__(self, editor.str_value)
self.setReadOnly(True)
self._editor = editor
def mouseReleaseEvent(self, e):
QtGui.QLineEdit.mouseReleaseEvent(self, e)
if e.button() == QtCore.Qt.MouseButton.LeftButton:
self._editor.popup_editor()
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