Module scenes 

Enums

SceneUpdateResult

When a scene wants to add or remove a scene from the stack it should return Push or Pop from Scene.update

Traits

PrePost

Scene

Scenes represent a mode/feature of a programs UI For example in an image editor you could have the main menu, editor, and save dialog as scenes and in an RPG you could have the field, battle and menu screens as scenes

Functions

empty_pre_post

run_scenes

Convenience method for programs built using Scenes

Type Aliases

SceneSwitcher

Creates new scenes.