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# (C) Copyright 2005-2023 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!
# (C) Copyright 2007 Riverbank Computing Limited
# 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
from pyface.qt import QtCore, QtGui
from traits.api import (
Any, Bool, Callable, Enum, Int, List, provides, Str, Tuple
)
from pyface.i_dialog import IDialog, MDialog
from pyface.constant import OK, CANCEL, YES, NO
from .window import Window
# Map PyQt dialog related constants to the pyface equivalents.
_RESULT_MAP = {
QtGui.QDialog.DialogCode.Accepted: OK,
QtGui.QDialog.DialogCode.Rejected: CANCEL,
QtGui.QMessageBox.StandardButton.Ok: OK,
QtGui.QMessageBox.StandardButton.Cancel: CANCEL,
QtGui.QMessageBox.StandardButton.Yes: YES,
QtGui.QMessageBox.StandardButton.No: NO,
}
@provides(IDialog)
class Dialog(MDialog, Window):
""" The toolkit specific implementation of a Dialog. See the IDialog
interface for the API documentation.
"""
# 'IDialog' interface -------------------------------------------------#
cancel_label = Str()
help_id = Str()
help_label = Str()
ok_label = Str()
resizeable = Bool(True)
return_code = Int(OK)
style = Enum("modal", "nonmodal")
# 'IWindow' interface -------------------------------------------------#
title = Str("Dialog")
# Private interface ---------------------------------------------------#
#: A list of connected Qt signals to be removed before destruction.
#: First item in the tuple is the Qt signal. The second item is the event
#: handler.
_connections_to_remove = List(Tuple(Any, Callable))
# ------------------------------------------------------------------------
# Protected 'IDialog' interface.
# ------------------------------------------------------------------------
def _create_buttons(self, parent):
buttons = QtGui.QDialogButtonBox()
# 'OK' button.
if self.ok_label:
btn = buttons.addButton(
self.ok_label, QtGui.QDialogButtonBox.ButtonRole.AcceptRole
)
else:
btn = buttons.addButton(QtGui.QDialogButtonBox.StandardButton.Ok)
btn.setDefault(True)
btn.clicked.connect(self.control.accept)
self._connections_to_remove.append((btn.clicked, self.control.accept))
# 'Cancel' button.
if self.cancel_label:
btn = buttons.addButton(
self.cancel_label, QtGui.QDialogButtonBox.ButtonRole.RejectRole
)
else:
btn = buttons.addButton(QtGui.QDialogButtonBox.StandardButton.Cancel)
btn.clicked.connect(self.control.reject)
self._connections_to_remove.append((btn.clicked, self.control.reject))
# 'Help' button.
# FIXME v3: In the original code the only possible hook into the help
# was to reimplement self._on_help(). However this was a private
# method. Obviously nobody uses the Help button. For the moment we
# display it but can't actually use it.
if len(self.help_id) > 0:
if self.help_label:
buttons.addButton(
self.help_label, QtGui.QDialogButtonBox.ButtonRole.HelpRole
)
else:
buttons.addButton(QtGui.QDialogButtonBox.StandardButton.Help)
return buttons
def _create_contents(self, parent):
layout = QtGui.QVBoxLayout()
if not self.resizeable:
layout.setSizeConstraint(QtGui.QLayout.SizeConstraint.SetFixedSize)
layout.addWidget(self._create_dialog_area(parent))
layout.addWidget(self._create_buttons(parent))
parent.setLayout(layout)
def _create_dialog_area(self, parent):
panel = QtGui.QWidget(parent)
panel.setMinimumSize(QtCore.QSize(100, 200))
palette = panel.palette()
palette.setColor(QtGui.QPalette.ColorRole.Window, QtGui.QColor("red"))
panel.setPalette(palette)
panel.setAutoFillBackground(True)
return panel
def _show_modal(self):
dialog = self.control
dialog.setWindowModality(QtCore.Qt.WindowModality.ApplicationModal)
# Suppress the context-help button hint, which
# results in a non-functional "?" button on Windows.
dialog.setWindowFlags(
dialog.windowFlags() & ~QtCore.Qt.WindowType.WindowContextHelpButtonHint
)
if hasattr(self.control, "exec"):
retval = self.control.exec()
else:
retval = self.control.exec_()
return _RESULT_MAP[retval]
# -------------------------------------------------------------------------
# 'IWidget' interface.
# -------------------------------------------------------------------------
def destroy(self):
while self._connections_to_remove:
signal, handler = self._connections_to_remove.pop()
signal.disconnect(handler)
super().destroy()
# ------------------------------------------------------------------------
# Protected 'IWidget' interface.
# ------------------------------------------------------------------------
def _create_control(self, parent):
dlg = QtGui.QDialog(parent)
# Setting return code and firing close events is handled for 'modal' in
# MDialog's open method. For 'nonmodal', we do it here.
if self.style == "nonmodal":
dlg.finished.connect(self._finished_fired)
self._connections_to_remove.append(
(dlg.finished, self._finished_fired)
)
if self.size != (-1, -1):
dlg.resize(*self.size)
if self.position != (-1, -1):
dlg.move(*self.position)
dlg.setWindowTitle(self.title)
return dlg
# ------------------------------------------------------------------------
# Private interface.
# ------------------------------------------------------------------------
def _finished_fired(self, result):
""" Called when the dialog is closed (and nonmodal). """
self.return_code = _RESULT_MAP[result]
self.close()
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