items_processors.py 文件源码

def __init__(self):
        super().__init__()

        self.set_name('ProcessorBox')
        self.set_valign(Gtk.Align.CENTER)
        self.set_halign(Gtk.Align.CENTER)
        self.set_hexpand(True)
        self.set_vexpand(True)
        self.set_orientation(Gtk.Orientation.VERTICAL)

        self._stack = Gtk.Stack()
        self._stack.set_transition_type(Gtk.StackTransitionType.CROSSFADE)
        self._stack.set_transition_duration(300)
        self._stack.props.margin = ItemsProcessors.MARGIN

        self._switcher = Gtk.StackSwitcher()
        self._switcher.set_no_show_all(True)
        self._switcher.set_stack(self._stack)
        self._switcher.set_halign(Gtk.Align.CENTER)
        self._switcher.props.margin = ItemsProcessors.MARGIN
        self._switcher.show()

        self.add(self._switcher)
        self.add(self._stack)
        self.show_all()

        self._items = []
        self._timeout_id = 0
        self._show_switcher = True