SpectrogramGraphicView.py 文件源码

def create_context_menu(self):
        menu = QMenu()
        menu.setToolTipsVisible(True)
        self._add_zoom_actions_to_menu(menu)

        if self.something_is_selected:
            filter_bw = Filter.read_configured_filter_bw()
            text = self.tr("Apply bandpass filter (filter bw={0:n})".format(filter_bw))
            create_from_frequency_selection = menu.addAction(text)
            create_from_frequency_selection.triggered.connect(self.on_create_from_frequency_selection_triggered)
            create_from_frequency_selection.setIcon(QIcon.fromTheme("view-filter"))

            try:
                cancel_button = " or ".join(k.toString() for k in QKeySequence.keyBindings(QKeySequence.Cancel))
            except Exception as e:
                logger.debug("Error reading cancel button: " + str(e))
                cancel_button = "Esc"

            create_from_frequency_selection.setToolTip("You can abort filtering with <b>{}</b>.".format(cancel_button))

        configure_filter_bw = menu.addAction(self.tr("Configure filter bandwidth..."))
        configure_filter_bw.triggered.connect(self.on_configure_filter_bw_triggered)
        configure_filter_bw.setIcon(QIcon.fromTheme("configure"))

        return menu