Python QtWidgets.QButtonGroup类代码示例

    def __init__(self, options, multiple, columns=2, parent=None):
        super(CheckboxesPanel, self).__init__(parent)

        self._options = []
        for i, option in enumerate(options):
            if isinstance(option, str):
                self._options.append((i, option))
            else:
                self.options.append(option)
        self._multiple = multiple
        self._buttons = []
        rows = len(options) / columns

        self._buttonGroup = QButtonGroup()
        self._buttonGroup.setExclusive(not multiple)
        layout = QGridLayout()
        layout.setContentsMargins(0, 0, 0, 0)
        layout.setMargin(0)
        for i, (v, t) in enumerate(self._options):
            if multiple:
                button = QCheckBox(t)
            else:
                button = QRadioButton(t)
            self._buttons.append((v, button))
            self._buttonGroup.addButton(button, i)
            layout.addWidget(button, i % rows, i / rows)
        layout.addItem(QSpacerItem(0, 0, QSizePolicy.Expanding, QSizePolicy.Minimum),
                       0, columns)
        self.setLayout(layout)

        if multiple:
            self.setContextMenuPolicy(Qt.CustomContextMenu)
            self.customContextMenuRequested.connect(self.showPopupMenu)

    def __init__(self, iface, parent=None):
        self.iface = iface
        self.plugin_dir = os.path.dirname(__file__)

        # Some constants
        self.SDELLIPSE = self.tr('SD Ellipse')
        self.CANCEL = self.tr('Cancel')
        self.HELP = self.tr('Help')
        self.CLOSE = self.tr('Close')
        self.OK = self.tr('OK')

        """Constructor."""
        super(SDEllipseDialog, self).__init__(parent)
        # Set up the user interface from Designer.
        # After setupUI you can access any designer object by doing
        # self.<objectname>, and you can use autoconnect slots - see
        # http://qt-project.org/doc/qt-4.8/designer-using-a-ui-file.html
        # #widgets-and-dialogs-with-auto-connect
        self.setupUi(self)

        self.method_group = QButtonGroup()
        self.method_group.addButton(self.yuill_rb)
        self.method_group.addButton(self.crimestat_rb)
        self.method_group.buttonClicked[QAbstractButton].connect(
                                                   self.methodChanged)
        self.yuill_rb.setChecked(True)
        self.method = 1
        okButton = self.button_box.button(QDialogButtonBox.Ok)
        okButton.setText(self.OK)
        cancelButton = self.button_box.button(QDialogButtonBox.Cancel)
        cancelButton.setText(self.CANCEL)
        cancelButton.setEnabled(False)
        # helpButton = self.button_box.button(QDialogButtonBox.Help)
        helpButton = self.helpButton
        helpButton.setText(self.HELP)
        closeButton = self.button_box.button(QDialogButtonBox.Close)
        closeButton.setText(self.CLOSE)

        # Connect signals
        okButton.clicked.connect(self.startWorker)
        cancelButton.clicked.connect(self.killWorker)
        helpButton.clicked.connect(self.giveHelp)
        closeButton.clicked.connect(self.reject)
        self.cumulative = False
        inpIndexCh = self.InputLayer.currentIndexChanged['QString']
        inpIndexCh.connect(self.layerchanged)
        # QObject.disconnect(self.button_box, SIGNAL("rejected()"),
        #                    self.reject)
        self.button_box.rejected.disconnect(self.reject)

        # Set instance variables
        self.worker = None
        self.inputlayerid = None
        self.layerlistchanging = False
        self.selectedFeatures_cb.setChecked(True)
        self.useWeights_cb.setChecked(False)
        self.result = None

    def __init__(self, parent=None, iface=None):
        """Constructor for import dialog.

        .. versionadded: 3.3

        :param parent: Optional widget to use as parent.
        :type parent: QWidget

        :param iface: An instance of QgisInterface.
        :type iface: QgisInterface
        """
        QDialog.__init__(self, parent)
        self.parent = parent
        self.setupUi(self)

        title = self.tr('PetaBencana Downloader')
        self.setWindowTitle(title)
        icon = resources_path('img', 'icons', 'add-petabencana-layer.svg')
        self.setWindowIcon(QtGui.QIcon(icon))

        self.iface = iface

        self.source = None

        self.radio_button_group = QButtonGroup()
        self.radio_button_group.addButton(self.radio_button_production)
        self.radio_button_group.addButton(self.radio_button_development)

        self.radio_button_group.setExclusive(True)
        self.radio_button_production.setChecked(True)
        self.populate_combo_box()

        developer_mode = setting('developer_mode', False, bool)
        if not developer_mode:
            self.radio_button_widget.hide()
            self.source_label.hide()
            self.output_group.adjustSize()

        # signals
        self.radio_button_production.clicked.connect(self.populate_combo_box)
        self.radio_button_development.clicked.connect(self.populate_combo_box)

        # Set up things for context help
        self.help_button = self.button_box.button(
            QtWidgets.QDialogButtonBox.Help)
        # Allow toggling the help button
        self.help_button.setCheckable(True)
        self.help_button.toggled.connect(self.help_toggled)
        self.main_stacked_widget.setCurrentIndex(1)

        # set up the validator for the file name prefix
        expression = QRegExp('^[A-Za-z0-9-_]*$')
        validator = QtGui.QRegExpValidator(expression, self.filename_prefix)
        self.filename_prefix.setValidator(validator)
        self.time_stamp = None
        self.restore_state()

    def __init__(self, parameter, parent=None):
        """Constructor.

        :param parameter: A DefaultValueParameter object.
        :type parameter: DefaultValueParameter

        """
        super(DefaultValueParameterWidget, self).__init__(parameter, parent)

        self.radio_button_layout = QHBoxLayout()

        # Create radio button group
        self.input_button_group = QButtonGroup()

        for i in range(len(self._parameter.labels)):
            if '%s' in self._parameter.labels[i]:
                label = (
                    self._parameter.labels[i] %
                    self._parameter.options[i])
            else:
                label = self._parameter.labels[i]

            radio_button = QRadioButton(label)
            self.radio_button_layout.addWidget(radio_button)
            self.input_button_group.addButton(radio_button, i)
            if self._parameter.value == \
                    self._parameter.options[i]:
                radio_button.setChecked(True)

        # Create double spin box for custom value
        self.custom_value = QDoubleSpinBox()
        self.custom_value.setSingleStep(0.1)
        if self._parameter.options[-1]:
            self.custom_value.setValue(self._parameter.options[-1])
        self.radio_button_layout.addWidget(self.custom_value)

        self.toggle_custom_value()

        self.inner_input_layout.addLayout(self.radio_button_layout)

        # Connect
        # noinspection PyUnresolvedReferences
        self.input_button_group.buttonClicked.connect(
            self.toggle_custom_value)

class CheckboxesPanel(QWidget):

    def __init__(self, options, multiple, columns=2, parent=None):
        super(CheckboxesPanel, self).__init__(parent)

        self._options = []
        for i, option in enumerate(options):
            if isinstance(option, str):
                self._options.append((i, option))
            else:
                self.options.append(option)
        self._multiple = multiple
        self._buttons = []
        rows = len(options) / columns

        self._buttonGroup = QButtonGroup()
        self._buttonGroup.setExclusive(not multiple)
        layout = QGridLayout()
        layout.setContentsMargins(0, 0, 0, 0)
        layout.setMargin(0)
        for i, (v, t) in enumerate(self._options):
            if multiple:
                button = QCheckBox(t)
            else:
                button = QRadioButton(t)
            self._buttons.append((v, button))
            self._buttonGroup.addButton(button, i)
            layout.addWidget(button, i % rows, i / rows)
        layout.addItem(QSpacerItem(0, 0, QSizePolicy.Expanding, QSizePolicy.Minimum),
                       0, columns)
        self.setLayout(layout)

        if multiple:
            self.setContextMenuPolicy(Qt.CustomContextMenu)
            self.customContextMenuRequested.connect(self.showPopupMenu)

    def showPopupMenu(self):
        popup_menu = QMenu()
        select_all_action = QAction(self.tr('Select All'), popup_menu)
        select_all_action.triggered.connect(self.selectAll)
        clear_all_action = QAction(self.tr('Clear Selection'), popup_menu)
        clear_all_action.triggered.connect(self.deselectAll)
        popup_menu.addAction(select_all_action)
        popup_menu.addAction(clear_all_action)
        popup_menu.exec_(QCursor.pos())

    def selectAll(self):
        for (v, button) in self._buttons:
            button.setChecked(True)

    def deselectAll(self):
        for (v, button) in self._buttons:
            button.setChecked(False)

    def value(self):
        if self._multiple:
            value = []
            for (v, checkbox) in self._buttons:
                if checkbox.isChecked():
                    value.append(v)
            return value
        else:
            return self._options[self._buttonGroup.checkedId()][0]

    def setValue(self, value):
        if self._multiple:
            for (v, button) in self._buttons:
                if v in value:
                    button.setChecked(True)
        else:
            for v, button in self._buttons:
                if v == value:
                    button.setChecked(True)

class SDEllipseDialog(QDialog, FORM_CLASS):

    def __init__(self, iface, parent=None):
        self.iface = iface
        self.plugin_dir = os.path.dirname(__file__)

        # Some constants
        self.SDELLIPSE = self.tr('SD Ellipse')
        self.CANCEL = self.tr('Cancel')
        self.HELP = self.tr('Help')
        self.CLOSE = self.tr('Close')
        self.OK = self.tr('OK')

        """Constructor."""
        super(SDEllipseDialog, self).__init__(parent)
        # Set up the user interface from Designer.
        # After setupUI you can access any designer object by doing
        # self.<objectname>, and you can use autoconnect slots - see
        # http://qt-project.org/doc/qt-4.8/designer-using-a-ui-file.html
        # #widgets-and-dialogs-with-auto-connect
        self.setupUi(self)

        self.method_group = QButtonGroup()
        self.method_group.addButton(self.yuill_rb)
        self.method_group.addButton(self.crimestat_rb)
        self.method_group.buttonClicked[QAbstractButton].connect(
                                                   self.methodChanged)
        self.yuill_rb.setChecked(True)
        self.method = 1
        okButton = self.button_box.button(QDialogButtonBox.Ok)
        okButton.setText(self.OK)
        cancelButton = self.button_box.button(QDialogButtonBox.Cancel)
        cancelButton.setText(self.CANCEL)
        cancelButton.setEnabled(False)
        # helpButton = self.button_box.button(QDialogButtonBox.Help)
        helpButton = self.helpButton
        helpButton.setText(self.HELP)
        closeButton = self.button_box.button(QDialogButtonBox.Close)
        closeButton.setText(self.CLOSE)

        # Connect signals
        okButton.clicked.connect(self.startWorker)
        cancelButton.clicked.connect(self.killWorker)
        helpButton.clicked.connect(self.giveHelp)
        closeButton.clicked.connect(self.reject)
        self.cumulative = False
        inpIndexCh = self.InputLayer.currentIndexChanged['QString']
        inpIndexCh.connect(self.layerchanged)
        # QObject.disconnect(self.button_box, SIGNAL("rejected()"),
        #                    self.reject)
        self.button_box.rejected.disconnect(self.reject)

        # Set instance variables
        self.worker = None
        self.inputlayerid = None
        self.layerlistchanging = False
        self.selectedFeatures_cb.setChecked(True)
        self.useWeights_cb.setChecked(False)
        self.result = None
    # end of __init__

    def giveHelp(self):
        self.showInfo('Giving help')
        QDesktopServices.openUrl(QUrl.fromLocalFile(
                         self.plugin_dir + "/help/html/index.html"))
        # showPluginHelp(None, "help/html/index")
    # end of giveHelp

    def startWorker(self):
        # self.showInfo('Ready to start worker')
        self.degfreedCorr = self.degfreedcorr_cb.isChecked()
        self.crimestatCorr = self.crimestatcorr_cb.isChecked()
        # Get the input layer
        layerindex = self.InputLayer.currentIndex()
        layerId = self.InputLayer.itemData(layerindex)
        inputlayer = QgsProject.instance().mapLayer(layerId)
        if inputlayer is None:
            self.showError(self.tr('No input layer defined'))
            return
        self.featureCount = 0
        if self.selectedFeatures_cb.isChecked():
            self.featureCount = inputlayer.selectedFeatureCount()
        if self.featureCount == 0:
            self.featureCount = inputlayer.featureCount()
        if self.featureCount < 2:
            self.showError(self.tr('Not enough features'))
            # self.scene.clear()
            return
        if (self.useWeights_cb.isChecked() and
                 self.inputField.count() == 0):
            self.showError(self.tr('Missing numerical field'))
            return
        fieldindex = self.inputField.currentIndex()
        fieldname = self.inputField.itemData(fieldindex)
        # inpfield = inputlayer.fieldNameIndex(fieldindex)
        # minval = inputlayer.minimumValue(inpfield)

        if (not self.useWeights_cb.isChecked()):
            fieldname = None
        self.result = None
#.........这里部分代码省略.........

class PetaBencanaDialog(QDialog, FORM_CLASS):

    """Downloader for PetaBencana data.

    .. versionadded: 3.3
    """

    def __init__(self, parent=None, iface=None):
        """Constructor for import dialog.

        .. versionadded: 3.3

        :param parent: Optional widget to use as parent.
        :type parent: QWidget

        :param iface: An instance of QgisInterface.
        :type iface: QgisInterface
        """
        QDialog.__init__(self, parent)
        self.parent = parent
        self.setupUi(self)

        title = self.tr('PetaBencana Downloader')
        self.setWindowTitle(title)
        icon = resources_path('img', 'icons', 'add-petabencana-layer.svg')
        self.setWindowIcon(QtGui.QIcon(icon))

        self.iface = iface

        self.source = None

        self.radio_button_group = QButtonGroup()
        self.radio_button_group.addButton(self.radio_button_production)
        self.radio_button_group.addButton(self.radio_button_development)

        self.radio_button_group.setExclusive(True)
        self.radio_button_production.setChecked(True)
        self.populate_combo_box()

        developer_mode = setting('developer_mode', False, bool)
        if not developer_mode:
            self.radio_button_widget.hide()
            self.source_label.hide()
            self.output_group.adjustSize()

        # signals
        self.radio_button_production.clicked.connect(self.populate_combo_box)
        self.radio_button_development.clicked.connect(self.populate_combo_box)

        # Set up things for context help
        self.help_button = self.button_box.button(
            QtWidgets.QDialogButtonBox.Help)
        # Allow toggling the help button
        self.help_button.setCheckable(True)
        self.help_button.toggled.connect(self.help_toggled)
        self.main_stacked_widget.setCurrentIndex(1)

        # set up the validator for the file name prefix
        expression = QRegExp('^[A-Za-z0-9-_]*$')
        validator = QtGui.QRegExpValidator(expression, self.filename_prefix)
        self.filename_prefix.setValidator(validator)
        self.time_stamp = None
        self.restore_state()

    @pyqtSlot(bool)  # prevents actions being handled twice
    def help_toggled(self, flag):
        """Show or hide the help tab in the stacked widget.

        .. versionadded: 3.3

        :param flag: Flag indicating whether help should be shown or hidden.
        :type flag: bool
        """
        if flag:
            self.help_button.setText(self.tr('Hide Help'))
            self.show_help()
        else:
            self.help_button.setText(self.tr('Show Help'))
            self.hide_help()

    def hide_help(self):
        """Hide the usage info from the user.

        .. versionadded:: 3.3
        """
        self.main_stacked_widget.setCurrentIndex(1)

    def show_help(self):
        """Show usage info to the user.

        .. versionadded: 3.3
        """
        # Read the header and footer html snippets
        self.main_stacked_widget.setCurrentIndex(0)
        header = html_header()
        footer = html_footer()

        string = header

        message = peta_bencana_help()
#.........这里部分代码省略.........

class DefaultValueParameterWidget(GenericParameterWidget):

    """Widget class for Default Value Parameter."""

    def __init__(self, parameter, parent=None):
        """Constructor.

        :param parameter: A DefaultValueParameter object.
        :type parameter: DefaultValueParameter

        """
        super(DefaultValueParameterWidget, self).__init__(parameter, parent)

        self.radio_button_layout = QHBoxLayout()

        # Create radio button group
        self.input_button_group = QButtonGroup()

        for i in range(len(self._parameter.labels)):
            if '%s' in self._parameter.labels[i]:
                label = (
                    self._parameter.labels[i] %
                    self._parameter.options[i])
            else:
                label = self._parameter.labels[i]

            radio_button = QRadioButton(label)
            self.radio_button_layout.addWidget(radio_button)
            self.input_button_group.addButton(radio_button, i)
            if self._parameter.value == \
                    self._parameter.options[i]:
                radio_button.setChecked(True)

        # Create double spin box for custom value
        self.custom_value = QDoubleSpinBox()
        self.custom_value.setSingleStep(0.1)
        if self._parameter.options[-1]:
            self.custom_value.setValue(self._parameter.options[-1])
        self.radio_button_layout.addWidget(self.custom_value)

        self.toggle_custom_value()

        self.inner_input_layout.addLayout(self.radio_button_layout)

        # Connect
        # noinspection PyUnresolvedReferences
        self.input_button_group.buttonClicked.connect(
            self.toggle_custom_value)

    def raise_invalid_type_exception(self):
        """Raise invalid type."""
        message = 'Expecting element type of %s' % (
            self._parameter.element_type.__name__)
        err = ValueError(message)
        return err

    def get_parameter(self):
        """Obtain list parameter object from the current widget state.

        :returns: A DefaultValueParameter from the current state of widget
        :rtype: DefaultValueParameter
        """
        radio_button_checked_id = self.input_button_group.checkedId()
        # No radio button checked, then default value = None
        if radio_button_checked_id == -1:
            self._parameter.value = None
        # The last radio button (custom) is checked, get the value from the
        # line edit
        elif radio_button_checked_id == len(self._parameter.options) - 1:
            self._parameter.options[radio_button_checked_id] = \
                self.custom_value.value()
            self._parameter.value = self.custom_value.value()
        else:
            self._parameter.value = self._parameter.options[
                radio_button_checked_id]

        return self._parameter

    def set_value(self, value):
        """Set value by item's string.

        :param value: The value.
        :type value: str, int

        :returns: True if success, else False.
        :rtype: bool
        """
        # Find index of choice
        try:
            value_index = self._parameter.options.index(value)
            self.input_button_group.button(value_index).setChecked(True)
        except ValueError:
            last_index = len(self._parameter.options) - 1
            self.input_button_group.button(last_index).setChecked(
                True)
            self.custom_value.setValue(value)

        self.toggle_custom_value()

    def toggle_custom_value(self):
#.........这里部分代码省略.........

    def __init__(self, parameter, parent=None):
        """Constructor.

        :param parameter: A GroupSelectParameter object.
        :type parameter: GroupSelectParameter
        """
        QWidget.__init__(self, parent)
        self._parameter = parameter

        # Store spin box
        self.spin_boxes = {}

        # Create elements
        # Label (name)
        self.label = QLabel(self._parameter.name)

        # Layouts
        self.main_layout = QVBoxLayout()
        self.input_layout = QVBoxLayout()

        # _inner_input_layout must be filled with widget in the child class
        self.inner_input_layout = QVBoxLayout()

        self.radio_button_layout = QGridLayout()

        # Create radio button group
        self.input_button_group = QButtonGroup()

        # List widget
        self.list_widget = QListWidget()
        self.list_widget.setSelectionMode(QAbstractItemView.ExtendedSelection)
        self.list_widget.setDragDropMode(QAbstractItemView.DragDrop)
        self.list_widget.setDefaultDropAction(Qt.MoveAction)
        self.list_widget.setEnabled(False)
        self.list_widget.setSizePolicy(
            QSizePolicy.Maximum, QSizePolicy.Expanding)

        for i, key in enumerate(self._parameter.options):
            value = self._parameter.options[key]
            radio_button = QRadioButton(value.get('label'))
            self.radio_button_layout.addWidget(radio_button, i, 0)
            if value.get('type') == SINGLE_DYNAMIC:
                percentage_spin_box = PercentageSpinBox(self)
                self.radio_button_layout.addWidget(percentage_spin_box, i, 1)
                percentage_spin_box.setValue(value.get('value', 0))
                step = percentage_spin_box.singleStep()
                if step > 1:
                    precision = 0
                else:
                    precision = len(str(step).split('.')[1])
                    if precision > 3:
                        precision = 3
                percentage_spin_box.setDecimals(precision)
                self.spin_boxes[key] = percentage_spin_box

                # Enable spin box depends on the selected option
                if self._parameter.selected == key:
                    percentage_spin_box.setEnabled(True)
                else:
                    percentage_spin_box.setEnabled(False)

            elif value.get('type') == STATIC:
                static_value = value.get('value', 0)
                if static_value is not None:
                    self.radio_button_layout.addWidget(
                        QLabel(str(static_value * 100) + ' %'), i, 1)
            elif value.get('type') == MULTIPLE_DYNAMIC:
                if self._parameter.selected == key:
                    self.list_widget.setEnabled(True)
                else:
                    self.list_widget.setEnabled(False)

            self.input_button_group.addButton(radio_button, i)
            if self._parameter.selected == key:
                radio_button.setChecked(True)

        # Help text
        self.help_label = QLabel(self._parameter.help_text)
        self.help_label.setSizePolicy(
            QSizePolicy.Maximum, QSizePolicy.Expanding)
        self.help_label.setWordWrap(True)
        self.help_label.setAlignment(Qt.AlignTop)

        self.inner_input_layout.addLayout(self.radio_button_layout)
        self.inner_input_layout.addWidget(self.list_widget)

        # Put elements into layouts
        self.input_layout.addWidget(self.label)
        self.input_layout.addLayout(self.inner_input_layout)

        self.help_layout = QVBoxLayout()
        self.help_layout.addWidget(self.help_label)

        self.main_layout.addLayout(self.input_layout)
        self.main_layout.addLayout(self.help_layout)

        self.setLayout(self.main_layout)

        self.setSizePolicy(QSizePolicy.Maximum, QSizePolicy.Expanding)

#.........这里部分代码省略.........

class GroupSelectParameterWidget(GenericParameterWidget):

    """Widget class for Group Select Parameter."""

    def __init__(self, parameter, parent=None):
        """Constructor.

        :param parameter: A GroupSelectParameter object.
        :type parameter: GroupSelectParameter
        """
        QWidget.__init__(self, parent)
        self._parameter = parameter

        # Store spin box
        self.spin_boxes = {}

        # Create elements
        # Label (name)
        self.label = QLabel(self._parameter.name)

        # Layouts
        self.main_layout = QVBoxLayout()
        self.input_layout = QVBoxLayout()

        # _inner_input_layout must be filled with widget in the child class
        self.inner_input_layout = QVBoxLayout()

        self.radio_button_layout = QGridLayout()

        # Create radio button group
        self.input_button_group = QButtonGroup()

        # List widget
        self.list_widget = QListWidget()
        self.list_widget.setSelectionMode(QAbstractItemView.ExtendedSelection)
        self.list_widget.setDragDropMode(QAbstractItemView.DragDrop)
        self.list_widget.setDefaultDropAction(Qt.MoveAction)
        self.list_widget.setEnabled(False)
        self.list_widget.setSizePolicy(
            QSizePolicy.Maximum, QSizePolicy.Expanding)

        for i, key in enumerate(self._parameter.options):
            value = self._parameter.options[key]
            radio_button = QRadioButton(value.get('label'))
            self.radio_button_layout.addWidget(radio_button, i, 0)
            if value.get('type') == SINGLE_DYNAMIC:
                percentage_spin_box = PercentageSpinBox(self)
                self.radio_button_layout.addWidget(percentage_spin_box, i, 1)
                percentage_spin_box.setValue(value.get('value', 0))
                step = percentage_spin_box.singleStep()
                if step > 1:
                    precision = 0
                else:
                    precision = len(str(step).split('.')[1])
                    if precision > 3:
                        precision = 3
                percentage_spin_box.setDecimals(precision)
                self.spin_boxes[key] = percentage_spin_box

                # Enable spin box depends on the selected option
                if self._parameter.selected == key:
                    percentage_spin_box.setEnabled(True)
                else:
                    percentage_spin_box.setEnabled(False)

            elif value.get('type') == STATIC:
                static_value = value.get('value', 0)
                if static_value is not None:
                    self.radio_button_layout.addWidget(
                        QLabel(str(static_value * 100) + ' %'), i, 1)
            elif value.get('type') == MULTIPLE_DYNAMIC:
                if self._parameter.selected == key:
                    self.list_widget.setEnabled(True)
                else:
                    self.list_widget.setEnabled(False)

            self.input_button_group.addButton(radio_button, i)
            if self._parameter.selected == key:
                radio_button.setChecked(True)

        # Help text
        self.help_label = QLabel(self._parameter.help_text)
        self.help_label.setSizePolicy(
            QSizePolicy.Maximum, QSizePolicy.Expanding)
        self.help_label.setWordWrap(True)
        self.help_label.setAlignment(Qt.AlignTop)

        self.inner_input_layout.addLayout(self.radio_button_layout)
        self.inner_input_layout.addWidget(self.list_widget)

        # Put elements into layouts
        self.input_layout.addWidget(self.label)
        self.input_layout.addLayout(self.inner_input_layout)

        self.help_layout = QVBoxLayout()
        self.help_layout.addWidget(self.help_label)

        self.main_layout.addLayout(self.input_layout)
        self.main_layout.addLayout(self.help_layout)

#.........这里部分代码省略.........