How to use the ptpython.utils.if_mousedown function in ptpython

    @if_mousedown
    def tab(mouse_event):
        _select_other_window(history)

    @if_mousedown
    def toggle_sidebar(mouse_event):
        " Click handler for the menu. "
        python_input.show_sidebar = not python_input.show_sidebar

            @if_mousedown
            def select_item(mouse_event):
                python_input.selected_option_index = index

    @if_mousedown
    def toggle_paste_mode(mouse_event):
        python_input.paste_mode = not python_input.paste_mode

    @if_mousedown
    def enter_history(mouse_event):
        python_input.enter_history()

    @if_mousedown
    def f1(mouse_event):
        _toggle_help(history)

    @if_mousedown
    def toggle_vi_mode(mouse_event):
        python_input.vi_mode = not python_input.vi_mode

            @if_mousedown
            def goto_next(mouse_event):
                " Select item and go to next value. "
                python_input.selected_option_index = index
                option = python_input.selected_option
                option.activate_next()