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# -*- coding: utf-8 -*-
#
# Copyright (C) 2013,2014 LEAP
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY 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/>.
#
"""
An instance of class Providers, held by mainwindow, is responsible for
managing the current provider and the combobox provider list.
"""
from collections import deque
from PySide import QtCore
class Providers(QtCore.QObject):
# Emitted when the user changes the provider combobox index. The object
# parameter is actually a boolean value that is True if "Other..." was
# selected, False otherwse
_provider_changed = QtCore.Signal(object)
def __init__(self, providers_combo):
"""
:param providers_combo: combo widget that lists providers
:type providers_combo: QWidget
"""
QtCore.QObject.__init__(self)
self._providers_indexes = deque(maxlen=2) # previous and current
self._providers_indexes.append(-1)
self._combo = providers_combo
self._combo.currentIndexChanged.connect(
self._current_provider_changed)
def set_providers(self, provider_list):
"""
Set the provider list to provider_list plus an "Other..." item
that triggers the wizard
:param provider_list: list of providers
:type provider_list: list of str
"""
self._combo.blockSignals(True)
self._combo.clear()
self._combo.addItems(provider_list + [self.tr("Other...")])
self._combo.blockSignals(False)
def select_provider_by_name(self, name):
"""
Given a provider name/domain, it selects it in the combobox
:param name: name or domain for the provider
:type name: unicode str
"""
provider_index = self._combo.findText(name)
self._providers_indexes.append(provider_index)
# block the signals during a combobox change since we don't want to
# trigger the default signal that makes the UI ask the user for
# confirmation
self._combo.blockSignals(True)
self._combo.setCurrentIndex(provider_index)
self._combo.blockSignals(False)
def get_selected_provider(self):
"""
Returns the selected provider in the combobox
:rtype: unicode str
"""
return self._combo.currentText()
def connect_provider_changed(self, callback):
"""
Connects callback to provider_changed signal
"""
self._provider_changed.connect(callback)
def restore_previous_provider(self):
"""
Set as selected provider the one that was selected previously.
"""
prev_provider = self._providers_indexes.popleft()
self._providers_indexes.append(prev_provider)
self._combo.blockSignals(True)
self._combo.setCurrentIndex(prev_provider)
self._combo.blockSignals(False)
@QtCore.Slot(int)
def _current_provider_changed(self, idx):
"""
TRIGGERS:
self._combo.currentIndexChanged
:param idx: the index of the new selected item
:type idx: int
"""
self._providers_indexes.append(idx)
is_wizard = idx == (self._combo.count() - 1)
self._provider_changed.emit(is_wizard)
if is_wizard:
self.restore_previous_provider()
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