# NanoVNASaver
#
# A python program to view and export Touchstone data from a NanoVNA
# Copyright (C) 2019, 2020 Rune B. Broberg
# Copyright (C) 2020 NanoVNA-Saver Authors
#
# 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 .
import logging
from time import strftime, localtime
from urllib import request, error
from PyQt5 import QtWidgets, QtCore
from NanoVNASaver.About import VERSION_URL, INFO_URL
from NanoVNASaver.Version import Version
logger = logging.getLogger(__name__)
class AboutWindow(QtWidgets.QWidget):
def __init__(self, app: QtWidgets.QWidget):
super().__init__()
self.app = app
self.setWindowTitle("About NanoVNASaver")
self.setWindowIcon(self.app.icon)
top_layout = QtWidgets.QHBoxLayout()
self.setLayout(top_layout)
QtWidgets.QShortcut(QtCore.Qt.Key_Escape, self, self.hide)
icon_layout = QtWidgets.QVBoxLayout()
top_layout.addLayout(icon_layout)
icon = QtWidgets.QLabel()
icon.setPixmap(self.app.icon.pixmap(128, 128))
icon_layout.addWidget(icon)
icon_layout.addStretch()
layout = QtWidgets.QVBoxLayout()
top_layout.addLayout(layout)
layout.addWidget(QtWidgets.QLabel(
f"NanoVNASaver version {self.app.version}"))
layout.addWidget(QtWidgets.QLabel(""))
layout.addWidget(QtWidgets.QLabel(
"\N{COPYRIGHT SIGN} Copyright 2019, 2020 Rune B. Broberg\n"
"\N{COPYRIGHT SIGN} Copyright 2020 NanoVNA-Saver Authors"
))
layout.addWidget(QtWidgets.QLabel(
"This program comes with ABSOLUTELY NO WARRANTY"))
layout.addWidget(QtWidgets.QLabel(
"This program is licensed under the"
" GNU General Public License version 3"))
layout.addWidget(QtWidgets.QLabel(""))
link_label = QtWidgets.QLabel(
f'For further details, see: '
f"{INFO_URL}")
link_label.setOpenExternalLinks(True)
layout.addWidget(link_label)
layout.addWidget(QtWidgets.QLabel(""))
self.versionLabel = QtWidgets.QLabel(
"NanoVNA Firmware Version: Not connected.")
layout.addWidget(self.versionLabel)
layout.addStretch()
btn_check_version = QtWidgets.QPushButton("Check for updates")
btn_check_version.clicked.connect(self.findUpdates)
self.updateLabel = QtWidgets.QLabel("Last checked: ")
self.updateCheckBox = QtWidgets.QCheckBox(
"Check for updates on startup")
self.updateCheckBox.toggled.connect(self.updateSettings)
check_for_updates = self.app.settings.value(
"CheckForUpdates", "Ask")
if check_for_updates == "Yes":
self.updateCheckBox.setChecked(True)
self.findUpdates(automatic=True)
elif check_for_updates == "No":
self.updateCheckBox.setChecked(False)
else:
logger.debug("Starting timer")
QtCore.QTimer.singleShot(2000, self.askAboutUpdates)
update_hbox = QtWidgets.QHBoxLayout()
update_hbox.addWidget(btn_check_version)
update_form = QtWidgets.QFormLayout()
update_hbox.addLayout(update_form)
update_hbox.addStretch()
update_form.addRow(self.updateLabel)
update_form.addRow(self.updateCheckBox)
layout.addLayout(update_hbox)
layout.addStretch()
btn_ok = QtWidgets.QPushButton("Ok")
btn_ok.clicked.connect(lambda: self.close()) # noqa
layout.addWidget(btn_ok)
def show(self):
super().show()
self.updateLabels()
def updateLabels(self):
try:
self.versionLabel.setText(
f"NanoVNA Firmware Version: {self.app.vna.name} "
f"v{self.app.vna.version}")
except (IOError, AttributeError):
pass
def updateSettings(self):
if self.updateCheckBox.isChecked():
self.app.settings.setValue("CheckForUpdates", "Yes")
else:
self.app.settings.setValue("CheckForUpdates", "No")
def askAboutUpdates(self):
logger.debug("Asking about automatic update checks")
selection = QtWidgets.QMessageBox.question(
self.app,
"Enable checking for updates?",
"Would you like NanoVNA-Saver to"
" check for updates automatically?")
if selection == QtWidgets.QMessageBox.Yes:
self.updateCheckBox.setChecked(True)
self.app.settings.setValue("CheckForUpdates", "Yes")
self.findUpdates()
elif selection == QtWidgets.QMessageBox.No:
self.updateCheckBox.setChecked(False)
self.app.settings.setValue("CheckForUpdates", "No")
QtWidgets.QMessageBox.information(
self.app,
"Checking for updates disabled",
'You can check for updates using the "About" window.')
else:
self.app.settings.setValue("CheckForUpdates", "Ask")
def findUpdates(self, automatic=False):
latest_version = Version()
latest_url = ""
try:
req = request.Request(VERSION_URL)
req.add_header('User-Agent', "NanoVNA-Saver/" + self.app.version)
for line in request.urlopen(req, timeout=3):
line = line.decode("utf-8")
if line.startswith("VERSION ="):
latest_version = Version(line[8:].strip(" \"'"))
if line.startswith("RELEASE_URL ="):
latest_url = line[13:].strip(" \"'")
except error.HTTPError as e:
logger.exception("Checking for updates produced an HTTP exception: %s", e)
self.updateLabel.setText("Connection error.")
return
except TypeError as e:
logger.exception("Checking for updates provided an unparseable file: %s", e)
self.updateLabel.setText("Data error reading versions.")
return
except error.URLError as e:
logger.exception("Checking for updates produced a URL exception: %s", e)
self.updateLabel.setText("Connection error.")
return
logger.info("Latest version is %s", latest_version)
this_version = Version(self.app.version)
logger.info("This is %s", this_version)
if latest_version > this_version:
logger.info("New update available: %s!", latest_version)
if automatic:
QtWidgets.QMessageBox.information(
self,
"Updates available",
f"There is a new update for NanoVNA-Saver available!\n"
f"Version {latest_version}\n\n"
f'Press "About" to find the update.')
else:
QtWidgets.QMessageBox.information(
self, "Updates available",
"There is a new update for NanoVNA-Saver available!")
self.updateLabel.setText(
f'New version available.')
self.updateLabel.setOpenExternalLinks(True)
else:
# Probably don't show a message box, just update the screen?
# Maybe consider showing it if not an automatic update.
#
self.updateLabel.setText(
f"Last checked: "
f"{strftime('%Y-%m-%d %H:%M:%S', localtime())}")
return