/usr/lib/python2.7/dist-packages/ubuntu-sso-client/ubuntu_sso/qt/sso_wizard_page.py is in ubuntu-sso-client-qt 13.10-0ubuntu11.
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#
# Copyright 2011-2013 Canonical Ltd.
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 3, as published
# by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranties of
# MERCHANTABILITY, SATISFACTORY QUALITY, or FITNESS FOR A PARTICULAR
# PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.
#
# In addition, as a special exception, the copyright holders give
# permission to link the code of portions of this program with the
# OpenSSL library under certain conditions as described in each
# individual source file, and distribute linked combinations
# including the two.
# You must obey the GNU General Public License in all respects
# for all of the code used other than OpenSSL. If you modify
# file(s) with this exception, you may extend this exception to your
# version of the file(s), but you are not obligated to do so. If you
# do not wish to do so, delete this exception statement from your
# version. If you delete this exception statement from all source
# files in the program, then also delete it here.
"""Qt implementation of the UI."""
from functools import wraps
# pylint: disable=F0401,E0611
from PyQt4.QtCore import Qt, pyqtSignal
from PyQt4.QtGui import (
QApplication,
QCursor,
QFrame,
QHBoxLayout,
QLabel,
QStyle,
QVBoxLayout,
QWizardPage,
)
from twisted.internet import defer
from ubuntu_sso import main
from ubuntu_sso.constants import APP_NAME, TC_URL, POLICY_URL
from ubuntu_sso.logger import setup_gui_logging, log_call
from ubuntu_sso.qt import (
ERROR_STYLE,
maybe_elide_text,
PREFERED_UI_SIZE,
TITLE_STYLE,
)
from ubuntu_sso.utils.ui import GENERIC_BACKEND_ERROR
logger = setup_gui_logging('ubuntu_sso.sso_wizard_page')
class WizardHeader(QFrame):
"""WizardHeader Class for Title and Subtitle in all wizard pages."""
def __init__(self, max_width, parent=None):
"""Create a new instance."""
super(WizardHeader, self).__init__(parent=parent)
self.max_width = max_width
self.max_title_width = self.max_width * 0.95
self.max_subtitle_width = self.max_width * 1.8
vbox = QVBoxLayout(self)
vbox.setContentsMargins(0, 0, 0, 0)
self.title_label = QLabel()
self.title_label.setWordWrap(True)
self.title_label.setObjectName('title_label')
self.subtitle_label = QLabel()
self.subtitle_label.setWordWrap(True)
self.subtitle_label.setFixedHeight(32)
vbox.addWidget(self.title_label)
vbox.addWidget(self.subtitle_label)
self.title_label.setVisible(False)
self.subtitle_label.setVisible(False)
def set_title(self, title):
"""Set the Title of the page or hide it otherwise"""
if title:
maybe_elide_text(self.title_label, title, self.max_title_width,
markup=TITLE_STYLE)
self.title_label.setVisible(True)
else:
self.title_label.setVisible(False)
def set_subtitle(self, subtitle):
"""Set the Subtitle of the page or hide it otherwise"""
if subtitle:
maybe_elide_text(self.subtitle_label, subtitle,
self.max_subtitle_width)
self.subtitle_label.setVisible(True)
else:
self.subtitle_label.setVisible(False)
class BaseWizardPage(QWizardPage):
"""Base class for all wizard pages."""
ui_class = None
max_width = 0
processingStarted = pyqtSignal()
processingFinished = pyqtSignal()
def __init__(self, parent=None):
super(BaseWizardPage, self).__init__(parent=parent)
self.ui = None
if self.ui_class is not None:
# self.ui_class is not callable, pylint: disable=E1102
self.ui = self.ui_class()
self.ui.setupUi(self)
if self.layout() is None:
self.setLayout(QVBoxLayout(self))
# Set the error area
self.form_errors_label = QLabel()
self.form_errors_label.setObjectName('form_errors')
self.form_errors_label.setAlignment(Qt.AlignBottom)
self.layout().insertWidget(0, self.form_errors_label)
# Set the header
self.header = WizardHeader(max_width=self.max_width)
self.header.set_title(title='')
self.header.set_subtitle(subtitle='')
self.layout().insertWidget(0, self.header)
self.layout().setAlignment(Qt.AlignLeft)
self._is_processing = False
def _get_is_processing(self):
"""Is this widget processing any request?"""
return self._is_processing
def _set_is_processing(self, new_value):
"""Set this widget to be processing a request."""
self._is_processing = new_value
self.setEnabled(not new_value)
if not self._is_processing:
self.processingFinished.emit()
else:
self.processingStarted.emit()
is_processing = property(fget=_get_is_processing, fset=_set_is_processing)
# pylint: disable=C0103
def cleanupPage(self):
"""Hide the errors."""
self.hide_error()
def setTitle(self, title=''):
"""Set the Wizard Page Title."""
self.header.set_title(title)
def setSubTitle(self, subtitle=''):
"""Set the Wizard Page Subtitle."""
self.header.set_subtitle(subtitle)
def title(self):
"""Return the header's title."""
return self.header.title_label.text()
def subTitle(self):
"""Return the header's subtitle."""
return self.header.subtitle_label.text()
# pylint: enable=C0103
@log_call(logger.error)
def show_error(self, message):
"""Show an error message inside the page."""
self.is_processing = False
maybe_elide_text(self.form_errors_label, message,
self.max_width * 0.95, markup=ERROR_STYLE)
def hide_error(self):
"""Hide the label errors in the current page."""
# We actually want the label with one empty char, because if it is an
# empty string, the height of the label is 0
self.form_errors_label.setText(' ')
class SSOWizardPage(BaseWizardPage):
"""Root class for all SSO specific wizard pages."""
_signals = {} # override in children
max_width = PREFERED_UI_SIZE['width']
def __init__(self, app_name, **kwargs):
"""Create a new instance."""
parent = kwargs.pop('parent', None)
super(SSOWizardPage, self).__init__(parent=parent)
# store common useful data provided by the app
self.app_name = APP_NAME
self.tc_url = TC_URL
self.policy_url = POLICY_URL
self.help_text = kwargs.get('help_text', '')
self._signals_receivers = {}
self.backend = None
self.setup_page()
def hide_overlay(self):
"""Emit the signal to notify the upper container that ends loading."""
self.is_processing = False
def show_overlay(self):
"""Emit the signal to notify the upper container that is loading."""
self.is_processing = True
@defer.inlineCallbacks
def setup_page(self):
"""Setup the widget components."""
logger.info('Starting setup_page for: %r', self)
# pylint: disable=W0702,W0703
try:
# Get Backend
client = yield main.get_sso_client()
self.backend = client.sso_login
self._set_translated_strings()
self._connect_ui()
# Call _setup_signals at the end, so we ensure that the UI
# is at least styled as expected if the operations with the
# backend fails.
self._setup_signals()
except:
message = 'There was a problem trying to setup the page %r' % self
self.show_error(message)
logger.exception(message)
self.setEnabled(False)
# pylint: enable=W0702,W0703
logger.info('%r - setup_page ends, backend is %r.', self, self.backend)
def _filter_by_app_name(self, f):
"""Excecute the decorated function only for 'self.app_name'."""
@wraps(f)
def inner(app_name, *args, **kwargs):
"""Execute 'f' only if 'app_name' matches 'self.app_name'."""
result = None
if app_name == self.app_name:
result = f(app_name, *args, **kwargs)
else:
logger.info('%s: ignoring call since received app_name '
'"%s" (expected "%s")',
f.__name__, app_name, self.app_name)
return result
return inner
def _setup_signals(self):
"""Bind signals to callbacks to be able to test the pages."""
for signal, method in self._signals.items():
actual = self._signals_receivers.get(signal)
if actual is not None:
msg = 'Signal %r is already connected with %r.'
logger.warning(msg, signal, actual)
match = self.backend.connect_to_signal(signal, method)
self._signals_receivers[signal] = match
def _set_translated_strings(self):
"""Implement in each child."""
def _connect_ui(self):
"""Implement in each child."""
def _handle_error(self, remote_call, handler, error):
"""Handle any error when calling the remote backend."""
logger.error('Remote call %r failed with: %r', remote_call, error)
errordict = {'message': GENERIC_BACKEND_ERROR}
handler(self.app_name, errordict)
class EnhancedLineEdit(object):
"""Represents and enhanced lineedit.
This class works on an already added lineedit to the widget so
that we are just adding extra items to it.
"""
def __init__(self, line_edit, valid_cb=lambda x: False,
warning_sign=False):
"""Create an instance."""
super(EnhancedLineEdit, self).__init__()
self._line_edit = line_edit
layout = QHBoxLayout(self._line_edit)
layout.setMargin(0)
self._line_edit.setLayout(layout)
self.valid_cb = valid_cb
layout.addStretch()
self.clear_label = QLabel(self._line_edit)
self.clear_label.setMargin(2)
self.clear_label.setProperty("lineEditWarning", True)
layout.addWidget(self.clear_label)
self.clear_label.setMinimumSize(16, 16)
self.clear_label.setVisible(False)
self.clear_label.setCursor(QCursor(Qt.ArrowCursor))
if warning_sign:
icon = QApplication.style().standardIcon(
QStyle.SP_MessageBoxWarning)
self.clear_label.setPixmap(icon.pixmap(16, 16))
# connect the change of text to the cation that will check if the
# text is valid and if the icon should be shown.
self._line_edit.textChanged.connect(self.show_button)
def show_button(self, string):
"""Decide if we show the button or not."""
if not self.valid_cb(string) and self.clear_label.pixmap() is not None:
self.clear_label.setVisible(True)
else:
self.clear_label.setVisible(False)
class SSOWizardEnhancedEditPage(SSOWizardPage):
"""Page that contains enhanced line edits."""
# Method '_connect_ui', '_set_translated_strings' is abstract in class
# 'SSOWizardPage' but is not overridden
# pylint: disable=W0223
def __init__(self, *args, **kwargs):
"""Create a new instance."""
self._enhanced_edits = {}
super(SSOWizardEnhancedEditPage, self).__init__(*args, **kwargs)
def set_line_edit_validation_rule(self, edit, cb):
"""Set a new enhanced edit so that we can show an icon."""
if edit in self._enhanced_edits:
self._enhanced_edits[edit].valid_cb = cb
else:
# create a new enhanced edit
enhanced_edit = EnhancedLineEdit(edit, cb)
self._enhanced_edits[edit] = enhanced_edit
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