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# (C) Copyright 2004-2023 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!
# System library imports
from pyface.qt import QtCore, QtGui
# ETS imports
from .editor import Editor
class SearchWidget(QtGui.QLineEdit):
# FIXME: This widget needs a search button and a cancel button like the
# wxWidgets SearchControl.
def __init__(self, desc):
"""Store the descriptive text for the widget."""
super().__init__()
self._desc = str(desc)
self._set_descriptive_text()
def focusInEvent(self, event):
"""Handles accepting focus.
If the text box contains the default description string, reset the text
color and clear the box.
"""
palette = QtGui.QApplication.instance().palette()
self.setPalette(palette)
if self.text() == self._desc:
self.setText("")
self.update()
super().focusInEvent(event)
def focusOutEvent(self, event):
"""Handles losing focus.
When focus is lost, if the user had typed something, keep that text,
otherwise replace it with the default description string.
"""
if len(self.text()) == 0:
self._set_descriptive_text()
super().focusOutEvent(event)
def _set_descriptive_text(self):
"""Sets the greyed-out descriptive text."""
palette = QtGui.QApplication.instance().palette()
palette.setColor(
QtGui.QPalette.ColorRole.Text, palette.color(QtGui.QPalette.ColorRole.Dark)
)
self.setPalette(palette)
self.setText(self._desc)
self.update()
class SearchEditor(Editor):
def init(self, parent):
"""Finishes initializing the editor by creating the underlying toolkit
widget.
"""
if QtCore.__version_info__ < (4, 7, 0):
control = self.control = SearchWidget(self.factory.text)
else:
control = self.control = QtGui.QLineEdit()
control.setPlaceholderText(self.factory.text)
if self.factory.auto_set:
control.textEdited.connect(self.update_object)
if self.factory.enter_set:
control.editingFinished.connect(self.update_object)
def update_object(self, event=None):
"""Handles the user entering input data in the edit control."""
if not self._no_update:
self.value = str(self.control.text())
if self.factory.search_event_trait != "":
setattr(self.object, self.factory.search_event_trait, True)
def update_editor(self):
"""Updates the editor when the object trait changes externally to the
editor.
"""
if str(self.control.text()) != self.value:
self._no_update = True
self.control.setText(self.str_value)
self._no_update = False
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