SetupWindow.py 文件源码

def __get_rate_combobox(self):
        """
        @description: get the sample rate combobox of the toolbar

        @return: a Gtk.Combobox
        """
        # the data in the model, of type string
        listmodel = Gtk.ListStore(int)
        # append the data in the model
        selected = 0
        i = 0
        self.rate_list = [8000, 16000]
        for rate_name in self.rate_list:
            listmodel.append([rate_name])
            if rate_name == self.audio_rate:
                selected = i
            i += 1

        # a combobox to see the data stored in the model
        rate_combobox = Gtk.ComboBox(model=listmodel)
        rate_combobox.set_tooltip_text("Set Sampling Rate")

        # a cellrenderer to render the text
        rate_cell = Gtk.CellRendererText()

        # pack the cell into the beginning of the combobox, allocating
        # no more space than needed
        rate_combobox.pack_start(rate_cell, False)
        # associate a property ("text") of the cellrenderer (cell) to a column (column 0)
        # in the model used by the combobox
        rate_combobox.add_attribute(rate_cell, "text", 0)

        # the first row is the active one by default at the beginning
        rate_combobox.set_active(selected)

        # connect the signal emitted when a row is selected to the callback function
        rate_combobox.connect("changed", self.on_rate_combochanged)
        return rate_combobox