book_element.py 文件源码

def _on_enter_notify(self, widget, event):
        """
        On enter notify add css hover class
        :param widget: as Gtk.EventBox
        :param event: as Gdk.Event
        """
        if self.ui.current_track_element is not self and not self.selected:
            self.play_img.set_from_icon_name(
                "media-playback-start-symbolic", Gtk.IconSize.SMALL_TOOLBAR)
        self.box.get_style_context().add_class("box_hover")
        self.play_img.get_style_context().add_class("box_hover")