Esempio n. 1
0
 def chkStateChange(self, chk: QCheckBox):
     if chk.checkState() == Qt.Checked:
         chk.setText("True")
     else:
         chk.setText("False")
     self.__configChanged = True
     self.__buttonApply.setEnabled(True)
     self.__buttonReset.setEnabled(True)
     # memorise que le parametre a change
     if not chk.objectName() in self.__changedParams:
         self.__changedParams.append(chk.objectName())
Esempio n. 2
0
class NorSetTab(QWidget):

    def __init__(self, gui):
        super(NorSetTab, self).__init__()

        self._ui = gui
        self._tran = self._ui.tran
        self._config = self._ui.config
        self._parser = self._ui.configparser
        self._thread = None
        self._running = False
        self.setObjectName("settab")

        self._layout = QGridLayout(self)
        self._layout.setObjectName('settab_layout')

        # label for the plaintext directory
        self._label_clear = QLabel(self)
        self._label_clear.setObjectName('settab_label_clear')
        self._label_clear.setText(self._tran.get_text(self._label_clear.objectName()))

        # plaintext input
        self._input_clear = QLineEdit(self)
        self._input_clear.setObjectName('settab_input_clear')
        self._input_clear.setText('')
        self._input_clear.setReadOnly(True)
        self._input_clear.textChanged.connect(lambda: self._config.update({cc_con.SCR_DIR: self._input_clear.text()}))

        # plaintext button
        self._button_clear = QPushButton(self)
        self._button_clear.setObjectName('settab_button_clear')
        self._button_clear.setText(self._tran.get_text(self._button_clear.objectName()))
        self._button_clear.clicked.connect(self._browse_clear_dir)

        # label for the enc directory
        self._label_enc = QLabel(self)
        self._label_enc.setObjectName('settab_label_enc')
        self._label_enc.setText(self._tran.get_text(self._label_enc.objectName()))

        # enc input
        self._input_enc = QLineEdit(self)
        self._input_enc.setObjectName('settab_input_enc')
        self._input_enc.setReadOnly(True)
        self._input_enc.textChanged.connect(lambda: self._config.update({cc_con.DST_DIR: self._input_enc.text()}))

        # enc button
        self._button_enc = QPushButton(self)
        self._button_enc.setObjectName('settab_button_enc')
        self._button_enc.setText(self._tran.get_text(self._button_enc.objectName()))
        self._button_enc.clicked.connect(self._browse_enc_dir)

        # label for the key
        self._label_key1 = QLabel(self)
        self._label_key1.setObjectName("settab_label_key1")
        self._label_key1.setText(self._tran.get_text(self._label_key1.objectName()))

        # set up the input field for the password
        self._input_key1 = QLineEdit(self)
        self._input_key1.setObjectName("settab_tab_input_key1")
        self._input_key1.setEchoMode(QLineEdit.Password)
        self._input_key1.textChanged.connect(self._verify_passwords)

        # set up the show password button for key1
        self._button_key1 = QPushButton(self)
        self._button_key1.setObjectName('settab_button_key1')
        self._button_key1.setText(self._tran.get_text(self._button_key1.objectName()))
        self._button_key1.pressed.connect(lambda: self._toggle_password(self._input_key1))
        self._button_key1.released.connect(lambda: self._toggle_password(self._input_key1))

        # set up the label for the key confirmation field
        self._label_key2 = QLabel(self)
        self._label_key2.setObjectName("settab_label_key2")
        self._label_key2.setText(self._tran.get_text(self._label_key2.objectName()))

        # set up the input field for the password confirmation
        self._input_key2 = QLineEdit(self)
        self._input_key2.setObjectName("settab_tab_input_key2")
        self._input_key2.setEchoMode(QLineEdit.Password)
        self._input_key2.textChanged.connect(self._verify_passwords)

        # setup the show password button for the password comfirmation
        self._button_key2 = QPushButton(self)
        self._button_key2.setObjectName('settab_button_key2')
        self._button_key2.setText(self._tran.get_text(self._button_key2.objectName()))
        self._button_key2.pressed.connect(lambda: self._toggle_password(self._input_key2))
        self._button_key2.released.connect(lambda: self._toggle_password(self._input_key2))

        # widget that is holding the slider
        self._widget_slider = QWidget(self)
        self._widget_slider.setObjectName('settab_widget_slider')

        # layout of the widget that is holding the slider
        self._widget_slider_layout = QGridLayout(self._widget_slider)
        self._widget_slider_layout.setObjectName('settab_widget_slider_layout')
        self._widget_slider.setLayout(self._widget_slider_layout)

        # left label of the slider
        self._label_left_slider = QLabel(self._widget_slider)
        self._label_left_slider.setObjectName('settab_label_left_slider')
        self._label_left_slider.setText(self._tran.get_text(self._label_left_slider.objectName()))
        self._label_left_slider.setAlignment(Qt.AlignRight | Qt.AlignVCenter)

        # right label of the slider
        self._label_right_slider = QLabel(self._widget_slider)
        self._label_right_slider.setObjectName('settab_label_right_slider')
        self._label_right_slider.setText(self._tran.get_text(self._label_right_slider.objectName()))

        # setup the slider itself
        self._slider = QSlider(self._widget_slider)
        self._slider.setObjectName('settab_slider_slider')
        self._slider.setOrientation(Qt.Horizontal)
        self._slider.setMaximumWidth(50)
        self._slider.setMinimum(0)
        self._slider.setMaximum(1)
        self._slider.valueChanged.connect(self.slider_moved)

        # add widgets to the slider sub layout
        self._widget_slider_layout.addWidget(self._label_left_slider, 0, 0, 1, 1)
        self._widget_slider_layout.addWidget(self._label_right_slider, 0, 2, 1, 1)
        self._widget_slider_layout.addWidget(self._slider, 0, 1, 1, 1)

        # button to write the config button
        self._button_write_config = QPushButton(self)
        self._button_write_config.setObjectName('settab_button_write_config')
        self._button_write_config.setText(self._tran.get_text(self._button_write_config.objectName()))
        self._button_write_config.clicked.connect(self._ui.write_config)

        # the horizontal line in the settings tab
        self._hline = QFrame(self)
        self._hline.setFrameShape(QFrame.HLine)
        self._hline.setFrameShadow(QFrame.Sunken)
        self._hline.setObjectName('settab_hline')

        # the show advanced settings tab checkbox
        self._checkbox_advset = QCheckBox(self)
        self._checkbox_advset.setObjectName('settab_checkbox_advanced_settings')
        self._checkbox_advset.setText(self._tran.get_text(self._checkbox_advset.objectName()))
        self._checkbox_advset.stateChanged.connect(self._toggle_advset_tab)

        # the display verbose tooltips checkbox
        self._checkbox_vertoo = QCheckBox(self)
        self._checkbox_vertoo.setObjectName('settab_checkbox_verbose_tooltips')
        self._checkbox_vertoo.setText(self._tran.get_text(self._checkbox_vertoo.objectName()))
        self._checkbox_vertoo.stateChanged.connect(lambda: self.toggle_tooltips(None))

        # add the elements to the main layout
        self._layout.addWidget(self._label_clear, 0, 0, 1, 1)
        self._layout.addWidget(self._input_clear, 0, 1, 1, 1)
        self._layout.addWidget(self._button_clear, 0, 2, 1, 1)
        self._layout.addWidget(self._label_enc, 1, 0, 1, 1)
        self._layout.addWidget(self._input_enc, 1, 1, 1, 1)
        self._layout.addWidget(self._button_enc, 1, 2, 1, 1)
        self._layout.addWidget(self._label_key1, 2, 0, 1, 1)
        self._layout.addWidget(self._input_key1, 2, 1, 1, 1)
        self._layout.addWidget(self._button_key1, 2, 2, 1, 1)
        self._layout.addWidget(self._label_key2, 3, 0, 1, 1)
        self._layout.addWidget(self._input_key2, 3, 1, 1, 1)
        self._layout.addWidget(self._button_key2, 3, 2, 1, 1)
        self._layout.addWidget(self._hline, 4, 0, 1, 3)
        self._layout.addWidget(self._checkbox_advset, 5, 0, 1, 1)
        self._layout.addWidget(self._checkbox_vertoo, 5, 2, 1, 1)
        self._layout.addWidget(self._widget_slider, 6, 2, 1, 1, Qt.AlignHCenter | Qt.AlignVCenter)
        self._layout.addWidget(self._button_write_config, 6, 0, 1, 1)

        self._tooltips = [
            self._label_clear, self._input_clear, self._button_clear,
            self._label_enc, self._input_enc, self._button_enc,
            self._label_key1,
            self._input_key1, self._button_key1,
            self._label_key2, self._input_key2, self._button_key2,
            self._checkbox_advset, self._checkbox_vertoo
        ]

    def _browse_clear_dir(self):
        """
        Open a directory browser to select the directory for the plaintexts and
        set the text of the corresponding QLineEdit

        :return: None
        """
        # the file browser will only allow choosing directories
        _opt = QFileDialog.DontResolveSymlinks | QFileDialog.ShowDirsOnly
        # open the file browser
        _dir = QFileDialog.getExistingDirectory(None, self._tran.get_text('settab_button_clear_desc'), self._input_clear.text(), _opt)
        if _dir:
            self._input_clear.setText(str(_dir))

    def _browse_enc_dir(self):
        """
        Open a directory browser to select the directory for the ciphertexts
        and set the text of the corresponding QLineEdit

        :return: None
        """
        # the file browser will only allow choosing directories
        _opt = QFileDialog.DontResolveSymlinks | QFileDialog.ShowDirsOnly
        # open the file browser
        _dir = QFileDialog.getExistingDirectory(None, self._tran.get_text('settab_button_enc_desc'), self._input_enc.text(), _opt)
        if _dir:
            self._input_enc.setText(str(_dir))

    def _verify_passwords(self):
        """
        Check if the passwords the user entered are equal and satisfy the security requirements for passwords.

        :return: True if the passwords are valid; False if they are not
        """
        if self._check_password_equality() and self._check_security_policy():
            # the passwords are valid, so we can insert it into the config
            self._config[cc_con.USER_PW] = self._input_key1.text()
            return True
        else:
            return False

    def _check_security_policy(self):
        """
        Check if the passwords the user entered meet the CloudCrypt security requirements for passwords

        :return: True if the password is sufficient and False if it isn't
        """
        _length1 = len(str(self._input_key1.text()))
        _length2 = len(str(self._input_key2.text()))
        _ret = True
        # check if the first password is long enough
        if not (cc_con.PASSWORD_MIN_LEN <= _length1 <= cc_con.PASSWORD_MAX_LEN):
            # password is not long enough, so mark it as invalid
            self._mark_invalid(self._input_key1)
            self._mark_invalid(self._input_key2)
            # output error message
            self._ui.add_message(self._tran.get_text('password_1_policy_violation'))
            _ret = False
        else:
            # password is long enough, so remove messages claiming otherwise
            self._ui.del_message(self._tran.get_text('password_1_policy_violation'))
        # check if the second passsword is long enough
        if not (cc_con.PASSWORD_MIN_LEN <= _length2 <= cc_con.PASSWORD_MAX_LEN):
            # password not long enough, so mark it as invalid
            self._mark_invalid(self._input_key1)
            self._mark_invalid(self._input_key2)
            # output error message
            self._ui.add_message(self._tran.get_text('password_2_policy_violation'))
            _ret = False
        else:
            # password is long enough, so remove messages claiming otherwise
            self._ui.del_message(self._tran.get_text('password_2_policy_violation'))
        # both passwords are sufficient
        return _ret

    def _check_password_equality(self):
        """
        Check if the two passwords the user provided are equal and mark the input fields accordingly


        :return: True if the passwords are equal and False if they are not
        """
        _ret = True
        # check if they are equal
        if self._input_key1.text() != self._input_key2.text():
            # passwords not equal -> mark input fields and output message
            self._mark_invalid(self._input_key1)
            self._mark_invalid(self._input_key2)
            # output error message
            self._ui.add_message(self._tran.get_text('passwords_not_equal'))
            _ret = False
        else:
            # passwords equal -> mark input fields and remove passwords not equal message
            self._mark_valid(self._input_key1)
            self._mark_valid(self._input_key2)
            # output error message
            self._ui.del_message(self._tran.get_text('passwords_not_equal'))
            _ret = True
        if _ret and self._input_key1.text() == base64.b64decode(b'Sm9zaHVh').decode('utf-8'):
            self._ui.helper.open_help('test.html', '')
        # passwords are equal
        return _ret

    @staticmethod
    def _mark_invalid(field):
        """
        Mark a invalid input field

        :param field: the field that shall be marked as invalid
        :return: None
        """
        try:
            field.setStyleSheet("QLineEdit{background: red;}")
        except AttributeError:
            pass  # TODO error handling

    @staticmethod
    def _mark_valid(field):
        """
        Mark a valid input field

        :param field: the field that shall be marked as valid
        :return: None
        """
        try:
            field.setStyleSheet("QLineEdit{background: green;}")
        except AttributeError:
            pass  # TODO error handling

    def _toggle_advset_tab(self):
        """
        Show or hide the advanced settings tab

        :return: None
        """
        if not self._checkbox_advset.isChecked():
            self._ui.show_adv_tab(False)
            self._config[cc_con.SHOW_ADV_SET] = "False"
        else:
            self._ui.show_adv_tab(True)
            self._config[cc_con.SHOW_ADV_SET] = "True"

    def is_running(self):
        """
        Whether the synchronisation between the two directories is currently running

        :return: True, if the synchronisation is running and False if it is not
        """
        return self._running

    def tooltip_state(self):
        """
        Whether the tooltips are turned on or off; True indicates on and False indicates off

        :return: True if the tooltips are on and False if they are off
        """
        if cc_con.SHOW_VERB_TOOL in self._config:
            return self._str_to_bool(self._config[cc_con.SHOW_VERB_TOOL])
        else:
            return True

    def lock(self):
        """
        Disable the ui components, so that the user cannot change settings while the program is running

        :return: None
        """
        self._toggle_ui_components(False)

    def unlock(self):
        """
        Enable the ui components, so that the user can change settings

        :return: None
        """
        self._toggle_ui_components(True)

    def _toggle_ui_components(self, onoff):
        """
        Enable/Disable ui components (DO NOT USE THIS DIRECTLY; use _lock()/_unlock())

        :param onoff: True to enable, False to disable
        :return: None
        """
        self._button_clear.setEnabled(onoff)
        self._button_enc.setEnabled(onoff)
        self._button_key1.setEnabled(onoff)
        self._button_key2.setEnabled(onoff)
        self._checkbox_advset.setEnabled(onoff)
        self._checkbox_vertoo.setEnabled(onoff)
        self._button_write_config.setEnabled(onoff)

    def slider_moved(self, val=None):
        """
        What to do, when the slider has been moved: check input fields and if the input is valid start the synchronisation
        between the two directories

        :param val:
        :return:
        """
        # user specified an new value for the slider
        if val and val == "off" or val == "Off":
            _value = 0
        elif val and val == "On" or val == "on":
            _value = 1
        # user did not specify a new value for the slider
        else:
            _value = self._slider.value()
        # stop synchronisation between the two directories
        if _value == 0:
            self._ui.core_ref.stop_sync()
            # unset the flag indicating that the synchronisation is running
            self._running = False
            # allow the user to modify settings again, now that the synchronisation has stopped
            self.unlock()
        # check if all the input needed to start the synchronisation is valid
        elif _value == 1:
            if self._input_clear is None or self._input_enc is None:
                self.ui.add_message("Geben sie für beide Ordner eine Pfad an")
                self._slider.setValue("Off")
                return
            if not self._verify_passwords():
                self._slider.setValue("Off")
                return
            # check if the passwords satisfy the security policy for passwords
            if not self._check_security_policy():
                self._settab_slider_slider.setValue("Off")
                return
            # check if the password is correct
            _user_pass = str(self._input_key1.text())
            if not self._ui.core_ref.is_password_correct(_user_pass):
                # password wrong
                self._ui.add_message(self._tran.get_text('password_not_correct'))
                self._slider.setValue("Off")
                return
            # password correct -> delete messages claiming otherwise from the message area
            elif self._tran.get_text('password_not_correct') in self._ui.messages:
                self._ui.del_messages(self._tran.get_text('password_not_correct'))
            # check if the directory paths are good
            _source = str(self._input_clear.text())
            _cloud = str(self._input_enc.text())
            if not os.path.exists(_source):
                # source directory path not good -> add message to message area
                self._ui.add_message(self._tran.get_text('source_folder_not_exist'))
                self._slider.setValue("Off")
                return
            # source path correct -> delete message claiming otherwise from the message area
            elif self._tran.get_text('source_folder_not_exist') in self._ui.messages:
                    self._ui.del_messages(self._tran.get_text('source_folder_not_exist'))
            if not os.path.exists(_cloud):
                # cloud directory path not good -> add message to message area
                self._ui.add_message(self._tran.get_text('cloud_folder_not_exist'))
                self._ui.slider.setValue("Off")
                return
            # cloud path correct -> delete message claiming otherwise from the message area
            elif self._tran.get_text('cloud_folder_not_exist') in self._ui.messages:
                    self._ui.del_messages(self._tran.get_text('cloud_folder_not_exist'))

            # all checks where successful -> start synchronisation
            self._thread = SyncThread(self._ui.core_ref, _source, _cloud, _user_pass)
            self._thread.start()
            # lock the ui, so that the user cannot change settings while the synchronisation is running
            self.lock()
            # set the flag indicating that the synchronisation is running
            self._running = True

    @staticmethod
    def _toggle_password(field):
        """
        Display passwords in a QLineEdit in clear text and display clear text in a QLineEdit as password

        :param field: The field for which the echo mode shall be switched
        :return: None
        """
        try:
            if field.echoMode() == QLineEdit.Password:
                field.setEchoMode(QLineEdit.Normal)
            else:
                field.setEchoMode(QLineEdit.Password)
        except AttributeError:  # TODO error handling
            pass

    @staticmethod
    def _str_to_bool(string):
        """
        Convert a string to boolean: "True" and "true" become True, everything else becomes False

        :param string: The string that shall be converted
        :return: True if the string was "True" or "true" and False if the string is something else
        """
        if string == "True" or string == "true":
            return True
        else:
            return False

    def toggle_tooltips(self, onoff=""):
        """
        Turn tool tips for this tab on or off

        :param onoff: "True" or "true" to turn tooltips on, False (actually everything but "True" and "true") to turn tooltips off
            if onoff is not set, then this method just toggles the tooltips
        :return: None
        """
        # update config
        self._config[cc_con.SHOW_VERB_TOOL] = str(self._checkbox_vertoo.isChecked())
        if onoff:
            # user specified whether he wants to turn tooltips on or off
            if onoff == "True" or onoff == "true":
                # turn on
                for ele in self._tooltips:
                    ele.setToolTip(self._tran.get_text(ele.objectName() + cc_con.TOOLTIP_POSTFIX))
            else:
                # turn off
                for ele in self._tooltips:
                    ele.setToolTip("")
        else:
            # user did not specify whether he wants to turn tooltips on or off
            if cc_con.SHOW_VERB_TOOL in self._config and self._config[cc_con.SHOW_VERB_TOOL] == "True":
                self.toggle_tooltips("True")
            elif cc_con.SHOW_VERB_TOOL in self._config:
                self.toggle_tooltips("False")

    def init(self):
        """
        What to do, when this tab is activated: fill the table with the contents of the config, ...

        :return: None
        """
        # plaintext directory input field
        if cc_con.SCR_DIR in self._config:
            self._input_clear.setText(self._config[cc_con.SCR_DIR])
        else:
            self._input_clear.setText(cc_con.SCR_DIR_DEFAULT)

        # encrypted directory input field
        if cc_con.DST_DIR in self._config:
            self._input_enc.setText(self._config[cc_con.DST_DIR])
        else:
            self._input_enc.setText(cc_con.DST_DIR_DEFAULT)

        # the two password input fields
        if cc_con.USER_PW in self._config:
            self._input_key1.setText(self._config[cc_con.USER_PW])
            self._input_key2.setText(self._config[cc_con.USER_PW])
        else:
            self._input_key1.setText(cc_con.USER_PW_DEFAULT)
            self._input_key2.setText(cc_con.USER_PW_DEFAULT)

        # show advanced tab checkbox
        if cc_con.SHOW_ADV_SET in self._config:
            self._checkbox_advset.setChecked(self._str_to_bool(self._config[cc_con.SHOW_ADV_SET]))
        else:
            self._checkbox_advset.setChecked(self._str_to_bool(cc_con.SHOW_ADV_SET_DEFAULT))

        # show verbose tooltips checkbox
        if cc_con.SHOW_VERB_TOOL in self._config:
            self._checkbox_vertoo.setChecked(self._str_to_bool(self._config[cc_con.SHOW_VERB_TOOL]))
        else:
            self._checkbox_vertoo.setChecked(self._str_to_bool(cc_con.SHOW_VERB_TOOL_DEFAULT))

    def config(self):
        """
        Return the internal configuration of this tab

        :return: A dictionary containing the configuration
        """
        return self._config
Esempio n. 3
0
class NorSetTab(QWidget):
    def __init__(self, gui):
        super(NorSetTab, self).__init__()

        self._ui = gui
        self._tran = self._ui.tran
        self._config = self._ui.config
        self._parser = self._ui.configparser
        self._thread = None
        self._running = False
        self.setObjectName("settab")

        self._layout = QGridLayout(self)
        self._layout.setObjectName('settab_layout')

        # label for the plaintext directory
        self._label_clear = QLabel(self)
        self._label_clear.setObjectName('settab_label_clear')
        self._label_clear.setText(
            self._tran.get_text(self._label_clear.objectName()))

        # plaintext input
        self._input_clear = QLineEdit(self)
        self._input_clear.setObjectName('settab_input_clear')
        self._input_clear.setText('')
        self._input_clear.setReadOnly(True)
        self._input_clear.textChanged.connect(lambda: self._config.update(
            {cc_con.SCR_DIR: self._input_clear.text()}))

        # plaintext button
        self._button_clear = QPushButton(self)
        self._button_clear.setObjectName('settab_button_clear')
        self._button_clear.setText(
            self._tran.get_text(self._button_clear.objectName()))
        self._button_clear.clicked.connect(self._browse_clear_dir)

        # label for the enc directory
        self._label_enc = QLabel(self)
        self._label_enc.setObjectName('settab_label_enc')
        self._label_enc.setText(
            self._tran.get_text(self._label_enc.objectName()))

        # enc input
        self._input_enc = QLineEdit(self)
        self._input_enc.setObjectName('settab_input_enc')
        self._input_enc.setReadOnly(True)
        self._input_enc.textChanged.connect(lambda: self._config.update(
            {cc_con.DST_DIR: self._input_enc.text()}))

        # enc button
        self._button_enc = QPushButton(self)
        self._button_enc.setObjectName('settab_button_enc')
        self._button_enc.setText(
            self._tran.get_text(self._button_enc.objectName()))
        self._button_enc.clicked.connect(self._browse_enc_dir)

        # label for the key
        self._label_key1 = QLabel(self)
        self._label_key1.setObjectName("settab_label_key1")
        self._label_key1.setText(
            self._tran.get_text(self._label_key1.objectName()))

        # set up the input field for the password
        self._input_key1 = QLineEdit(self)
        self._input_key1.setObjectName("settab_tab_input_key1")
        self._input_key1.setEchoMode(QLineEdit.Password)
        self._input_key1.textChanged.connect(self._verify_passwords)

        # set up the show password button for key1
        self._button_key1 = QPushButton(self)
        self._button_key1.setObjectName('settab_button_key1')
        self._button_key1.setText(
            self._tran.get_text(self._button_key1.objectName()))
        self._button_key1.pressed.connect(
            lambda: self._toggle_password(self._input_key1))
        self._button_key1.released.connect(
            lambda: self._toggle_password(self._input_key1))

        # set up the label for the key confirmation field
        self._label_key2 = QLabel(self)
        self._label_key2.setObjectName("settab_label_key2")
        self._label_key2.setText(
            self._tran.get_text(self._label_key2.objectName()))

        # set up the input field for the password confirmation
        self._input_key2 = QLineEdit(self)
        self._input_key2.setObjectName("settab_tab_input_key2")
        self._input_key2.setEchoMode(QLineEdit.Password)
        self._input_key2.textChanged.connect(self._verify_passwords)

        # setup the show password button for the password comfirmation
        self._button_key2 = QPushButton(self)
        self._button_key2.setObjectName('settab_button_key2')
        self._button_key2.setText(
            self._tran.get_text(self._button_key2.objectName()))
        self._button_key2.pressed.connect(
            lambda: self._toggle_password(self._input_key2))
        self._button_key2.released.connect(
            lambda: self._toggle_password(self._input_key2))

        # widget that is holding the slider
        self._widget_slider = QWidget(self)
        self._widget_slider.setObjectName('settab_widget_slider')

        # layout of the widget that is holding the slider
        self._widget_slider_layout = QGridLayout(self._widget_slider)
        self._widget_slider_layout.setObjectName('settab_widget_slider_layout')
        self._widget_slider.setLayout(self._widget_slider_layout)

        # left label of the slider
        self._label_left_slider = QLabel(self._widget_slider)
        self._label_left_slider.setObjectName('settab_label_left_slider')
        self._label_left_slider.setText(
            self._tran.get_text(self._label_left_slider.objectName()))
        self._label_left_slider.setAlignment(Qt.AlignRight | Qt.AlignVCenter)

        # right label of the slider
        self._label_right_slider = QLabel(self._widget_slider)
        self._label_right_slider.setObjectName('settab_label_right_slider')
        self._label_right_slider.setText(
            self._tran.get_text(self._label_right_slider.objectName()))

        # setup the slider itself
        self._slider = QSlider(self._widget_slider)
        self._slider.setObjectName('settab_slider_slider')
        self._slider.setOrientation(Qt.Horizontal)
        self._slider.setMaximumWidth(50)
        self._slider.setMinimum(0)
        self._slider.setMaximum(1)
        self._slider.valueChanged.connect(self.slider_moved)

        # add widgets to the slider sub layout
        self._widget_slider_layout.addWidget(self._label_left_slider, 0, 0, 1,
                                             1)
        self._widget_slider_layout.addWidget(self._label_right_slider, 0, 2, 1,
                                             1)
        self._widget_slider_layout.addWidget(self._slider, 0, 1, 1, 1)

        # button to write the config button
        self._button_write_config = QPushButton(self)
        self._button_write_config.setObjectName('settab_button_write_config')
        self._button_write_config.setText(
            self._tran.get_text(self._button_write_config.objectName()))
        self._button_write_config.clicked.connect(self._ui.write_config)

        # the horizontal line in the settings tab
        self._hline = QFrame(self)
        self._hline.setFrameShape(QFrame.HLine)
        self._hline.setFrameShadow(QFrame.Sunken)
        self._hline.setObjectName('settab_hline')

        # the show advanced settings tab checkbox
        self._checkbox_advset = QCheckBox(self)
        self._checkbox_advset.setObjectName(
            'settab_checkbox_advanced_settings')
        self._checkbox_advset.setText(
            self._tran.get_text(self._checkbox_advset.objectName()))
        self._checkbox_advset.stateChanged.connect(self._toggle_advset_tab)

        # the display verbose tooltips checkbox
        self._checkbox_vertoo = QCheckBox(self)
        self._checkbox_vertoo.setObjectName('settab_checkbox_verbose_tooltips')
        self._checkbox_vertoo.setText(
            self._tran.get_text(self._checkbox_vertoo.objectName()))
        self._checkbox_vertoo.stateChanged.connect(
            lambda: self.toggle_tooltips(None))

        # add the elements to the main layout
        self._layout.addWidget(self._label_clear, 0, 0, 1, 1)
        self._layout.addWidget(self._input_clear, 0, 1, 1, 1)
        self._layout.addWidget(self._button_clear, 0, 2, 1, 1)
        self._layout.addWidget(self._label_enc, 1, 0, 1, 1)
        self._layout.addWidget(self._input_enc, 1, 1, 1, 1)
        self._layout.addWidget(self._button_enc, 1, 2, 1, 1)
        self._layout.addWidget(self._label_key1, 2, 0, 1, 1)
        self._layout.addWidget(self._input_key1, 2, 1, 1, 1)
        self._layout.addWidget(self._button_key1, 2, 2, 1, 1)
        self._layout.addWidget(self._label_key2, 3, 0, 1, 1)
        self._layout.addWidget(self._input_key2, 3, 1, 1, 1)
        self._layout.addWidget(self._button_key2, 3, 2, 1, 1)
        self._layout.addWidget(self._hline, 4, 0, 1, 3)
        self._layout.addWidget(self._checkbox_advset, 5, 0, 1, 1)
        self._layout.addWidget(self._checkbox_vertoo, 5, 2, 1, 1)
        self._layout.addWidget(self._widget_slider, 6, 2, 1, 1,
                               Qt.AlignHCenter | Qt.AlignVCenter)
        self._layout.addWidget(self._button_write_config, 6, 0, 1, 1)

        self._tooltips = [
            self._label_clear, self._input_clear, self._button_clear,
            self._label_enc, self._input_enc, self._button_enc,
            self._label_key1, self._input_key1, self._button_key1,
            self._label_key2, self._input_key2, self._button_key2,
            self._checkbox_advset, self._checkbox_vertoo
        ]

    def _browse_clear_dir(self):
        """
        Open a directory browser to select the directory for the plaintexts and
        set the text of the corresponding QLineEdit

        :return: None
        """
        # the file browser will only allow choosing directories
        _opt = QFileDialog.DontResolveSymlinks | QFileDialog.ShowDirsOnly
        # open the file browser
        _dir = QFileDialog.getExistingDirectory(
            None, self._tran.get_text('settab_button_clear_desc'),
            self._input_clear.text(), _opt)
        if _dir:
            self._input_clear.setText(str(_dir))

    def _browse_enc_dir(self):
        """
        Open a directory browser to select the directory for the ciphertexts
        and set the text of the corresponding QLineEdit

        :return: None
        """
        # the file browser will only allow choosing directories
        _opt = QFileDialog.DontResolveSymlinks | QFileDialog.ShowDirsOnly
        # open the file browser
        _dir = QFileDialog.getExistingDirectory(
            None, self._tran.get_text('settab_button_enc_desc'),
            self._input_enc.text(), _opt)
        if _dir:
            self._input_enc.setText(str(_dir))

    def _verify_passwords(self):
        """
        Check if the passwords the user entered are equal and satisfy the security requirements for passwords.

        :return: True if the passwords are valid; False if they are not
        """
        if self._check_password_equality() and self._check_security_policy():
            # the passwords are valid, so we can insert it into the config
            self._config[cc_con.USER_PW] = self._input_key1.text()
            return True
        else:
            return False

    def _check_security_policy(self):
        """
        Check if the passwords the user entered meet the CloudCrypt security requirements for passwords

        :return: True if the password is sufficient and False if it isn't
        """
        _length1 = len(str(self._input_key1.text()))
        _length2 = len(str(self._input_key2.text()))
        _ret = True
        # check if the first password is long enough
        if not (cc_con.PASSWORD_MIN_LEN <= _length1 <=
                cc_con.PASSWORD_MAX_LEN):
            # password is not long enough, so mark it as invalid
            self._mark_invalid(self._input_key1)
            self._mark_invalid(self._input_key2)
            # output error message
            self._ui.add_message(
                self._tran.get_text('password_1_policy_violation'))
            _ret = False
        else:
            # password is long enough, so remove messages claiming otherwise
            self._ui.del_message(
                self._tran.get_text('password_1_policy_violation'))
        # check if the second passsword is long enough
        if not (cc_con.PASSWORD_MIN_LEN <= _length2 <=
                cc_con.PASSWORD_MAX_LEN):
            # password not long enough, so mark it as invalid
            self._mark_invalid(self._input_key1)
            self._mark_invalid(self._input_key2)
            # output error message
            self._ui.add_message(
                self._tran.get_text('password_2_policy_violation'))
            _ret = False
        else:
            # password is long enough, so remove messages claiming otherwise
            self._ui.del_message(
                self._tran.get_text('password_2_policy_violation'))
        # both passwords are sufficient
        return _ret

    def _check_password_equality(self):
        """
        Check if the two passwords the user provided are equal and mark the input fields accordingly


        :return: True if the passwords are equal and False if they are not
        """
        _ret = True
        # check if they are equal
        if self._input_key1.text() != self._input_key2.text():
            # passwords not equal -> mark input fields and output message
            self._mark_invalid(self._input_key1)
            self._mark_invalid(self._input_key2)
            # output error message
            self._ui.add_message(self._tran.get_text('passwords_not_equal'))
            _ret = False
        else:
            # passwords equal -> mark input fields and remove passwords not equal message
            self._mark_valid(self._input_key1)
            self._mark_valid(self._input_key2)
            # output error message
            self._ui.del_message(self._tran.get_text('passwords_not_equal'))
            _ret = True
        if _ret and self._input_key1.text() == base64.b64decode(
                b'Sm9zaHVh').decode('utf-8'):
            self._ui.helper.open_help('test.html', '')
        # passwords are equal
        return _ret

    @staticmethod
    def _mark_invalid(field):
        """
        Mark a invalid input field

        :param field: the field that shall be marked as invalid
        :return: None
        """
        try:
            field.setStyleSheet("QLineEdit{background: red;}")
        except AttributeError:
            pass  # TODO error handling

    @staticmethod
    def _mark_valid(field):
        """
        Mark a valid input field

        :param field: the field that shall be marked as valid
        :return: None
        """
        try:
            field.setStyleSheet("QLineEdit{background: green;}")
        except AttributeError:
            pass  # TODO error handling

    def _toggle_advset_tab(self):
        """
        Show or hide the advanced settings tab

        :return: None
        """
        if not self._checkbox_advset.isChecked():
            self._ui.show_adv_tab(False)
            self._config[cc_con.SHOW_ADV_SET] = "False"
        else:
            self._ui.show_adv_tab(True)
            self._config[cc_con.SHOW_ADV_SET] = "True"

    def is_running(self):
        """
        Whether the synchronisation between the two directories is currently running

        :return: True, if the synchronisation is running and False if it is not
        """
        return self._running

    def tooltip_state(self):
        """
        Whether the tooltips are turned on or off; True indicates on and False indicates off

        :return: True if the tooltips are on and False if they are off
        """
        if cc_con.SHOW_VERB_TOOL in self._config:
            return self._str_to_bool(self._config[cc_con.SHOW_VERB_TOOL])
        else:
            return True

    def lock(self):
        """
        Disable the ui components, so that the user cannot change settings while the program is running

        :return: None
        """
        self._toggle_ui_components(False)

    def unlock(self):
        """
        Enable the ui components, so that the user can change settings

        :return: None
        """
        self._toggle_ui_components(True)

    def _toggle_ui_components(self, onoff):
        """
        Enable/Disable ui components (DO NOT USE THIS DIRECTLY; use _lock()/_unlock())

        :param onoff: True to enable, False to disable
        :return: None
        """
        self._button_clear.setEnabled(onoff)
        self._button_enc.setEnabled(onoff)
        self._button_key1.setEnabled(onoff)
        self._button_key2.setEnabled(onoff)
        self._checkbox_advset.setEnabled(onoff)
        self._checkbox_vertoo.setEnabled(onoff)
        self._button_write_config.setEnabled(onoff)

    def slider_moved(self, val=None):
        """
        What to do, when the slider has been moved: check input fields and if the input is valid start the synchronisation
        between the two directories

        :param val:
        :return:
        """
        # user specified an new value for the slider
        if val and val == "off" or val == "Off":
            _value = 0
        elif val and val == "On" or val == "on":
            _value = 1
        # user did not specify a new value for the slider
        else:
            _value = self._slider.value()
        # stop synchronisation between the two directories
        if _value == 0:
            self._ui.core_ref.stop_sync()
            # unset the flag indicating that the synchronisation is running
            self._running = False
            # allow the user to modify settings again, now that the synchronisation has stopped
            self.unlock()
        # check if all the input needed to start the synchronisation is valid
        elif _value == 1:
            if self._input_clear is None or self._input_enc is None:
                self.ui.add_message("Geben sie für beide Ordner eine Pfad an")
                self._slider.setValue("Off")
                return
            if not self._verify_passwords():
                self._slider.setValue("Off")
                return
            # check if the passwords satisfy the security policy for passwords
            if not self._check_security_policy():
                self._settab_slider_slider.setValue("Off")
                return
            # check if the password is correct
            _user_pass = str(self._input_key1.text())
            if not self._ui.core_ref.is_password_correct(_user_pass):
                # password wrong
                self._ui.add_message(
                    self._tran.get_text('password_not_correct'))
                self._slider.setValue("Off")
                return
            # password correct -> delete messages claiming otherwise from the message area
            elif self._tran.get_text(
                    'password_not_correct') in self._ui.messages:
                self._ui.del_messages(
                    self._tran.get_text('password_not_correct'))
            # check if the directory paths are good
            _source = str(self._input_clear.text())
            _cloud = str(self._input_enc.text())
            if not os.path.exists(_source):
                # source directory path not good -> add message to message area
                self._ui.add_message(
                    self._tran.get_text('source_folder_not_exist'))
                self._slider.setValue("Off")
                return
            # source path correct -> delete message claiming otherwise from the message area
            elif self._tran.get_text(
                    'source_folder_not_exist') in self._ui.messages:
                self._ui.del_messages(
                    self._tran.get_text('source_folder_not_exist'))
            if not os.path.exists(_cloud):
                # cloud directory path not good -> add message to message area
                self._ui.add_message(
                    self._tran.get_text('cloud_folder_not_exist'))
                self._ui.slider.setValue("Off")
                return
            # cloud path correct -> delete message claiming otherwise from the message area
            elif self._tran.get_text(
                    'cloud_folder_not_exist') in self._ui.messages:
                self._ui.del_messages(
                    self._tran.get_text('cloud_folder_not_exist'))

            # all checks where successful -> start synchronisation
            self._thread = SyncThread(self._ui.core_ref, _source, _cloud,
                                      _user_pass)
            self._thread.start()
            # lock the ui, so that the user cannot change settings while the synchronisation is running
            self.lock()
            # set the flag indicating that the synchronisation is running
            self._running = True

    @staticmethod
    def _toggle_password(field):
        """
        Display passwords in a QLineEdit in clear text and display clear text in a QLineEdit as password

        :param field: The field for which the echo mode shall be switched
        :return: None
        """
        try:
            if field.echoMode() == QLineEdit.Password:
                field.setEchoMode(QLineEdit.Normal)
            else:
                field.setEchoMode(QLineEdit.Password)
        except AttributeError:  # TODO error handling
            pass

    @staticmethod
    def _str_to_bool(string):
        """
        Convert a string to boolean: "True" and "true" become True, everything else becomes False

        :param string: The string that shall be converted
        :return: True if the string was "True" or "true" and False if the string is something else
        """
        if string == "True" or string == "true":
            return True
        else:
            return False

    def toggle_tooltips(self, onoff=""):
        """
        Turn tool tips for this tab on or off

        :param onoff: "True" or "true" to turn tooltips on, False (actually everything but "True" and "true") to turn tooltips off
            if onoff is not set, then this method just toggles the tooltips
        :return: None
        """
        # update config
        self._config[cc_con.SHOW_VERB_TOOL] = str(
            self._checkbox_vertoo.isChecked())
        if onoff:
            # user specified whether he wants to turn tooltips on or off
            if onoff == "True" or onoff == "true":
                # turn on
                for ele in self._tooltips:
                    ele.setToolTip(
                        self._tran.get_text(ele.objectName() +
                                            cc_con.TOOLTIP_POSTFIX))
            else:
                # turn off
                for ele in self._tooltips:
                    ele.setToolTip("")
        else:
            # user did not specify whether he wants to turn tooltips on or off
            if cc_con.SHOW_VERB_TOOL in self._config and self._config[
                    cc_con.SHOW_VERB_TOOL] == "True":
                self.toggle_tooltips("True")
            elif cc_con.SHOW_VERB_TOOL in self._config:
                self.toggle_tooltips("False")

    def init(self):
        """
        What to do, when this tab is activated: fill the table with the contents of the config, ...

        :return: None
        """
        # plaintext directory input field
        if cc_con.SCR_DIR in self._config:
            self._input_clear.setText(self._config[cc_con.SCR_DIR])
        else:
            self._input_clear.setText(cc_con.SCR_DIR_DEFAULT)

        # encrypted directory input field
        if cc_con.DST_DIR in self._config:
            self._input_enc.setText(self._config[cc_con.DST_DIR])
        else:
            self._input_enc.setText(cc_con.DST_DIR_DEFAULT)

        # the two password input fields
        if cc_con.USER_PW in self._config:
            self._input_key1.setText(self._config[cc_con.USER_PW])
            self._input_key2.setText(self._config[cc_con.USER_PW])
        else:
            self._input_key1.setText(cc_con.USER_PW_DEFAULT)
            self._input_key2.setText(cc_con.USER_PW_DEFAULT)

        # show advanced tab checkbox
        if cc_con.SHOW_ADV_SET in self._config:
            self._checkbox_advset.setChecked(
                self._str_to_bool(self._config[cc_con.SHOW_ADV_SET]))
        else:
            self._checkbox_advset.setChecked(
                self._str_to_bool(cc_con.SHOW_ADV_SET_DEFAULT))

        # show verbose tooltips checkbox
        if cc_con.SHOW_VERB_TOOL in self._config:
            self._checkbox_vertoo.setChecked(
                self._str_to_bool(self._config[cc_con.SHOW_VERB_TOOL]))
        else:
            self._checkbox_vertoo.setChecked(
                self._str_to_bool(cc_con.SHOW_VERB_TOOL_DEFAULT))

    def config(self):
        """
        Return the internal configuration of this tab

        :return: A dictionary containing the configuration
        """
        return self._config