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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `app_state` mod in crate `widgetry`."><meta name="keywords" content="rust, rustlang, rust-lang, app_state"><title>widgetry::app_state - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="shortcut icon" href="../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc mod"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../widgetry/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a><p class='location'>Module app_state</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#structs">Structs</a></li><li><a href="#enums">Enums</a></li><li><a href="#traits">Traits</a></li></ul></div><p class='location'><a href='../index.html'>widgetry</a></p><script>window.sidebarCurrent = {name: 'app_state', ty: 'mod', relpath: '../'};</script><script defer src="../sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><span class="help-button">?</span>
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<a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span><a class='srclink' href='../../src/widgetry/app_state.rs.html#1-196' title='goto source code'>[src]</a></span><span class='in-band'>Module <a href='../index.html'>widgetry</a>::<wbr><a class="mod" href=''>app_state</a></span></h1><div class='docblock'><p>A widgetry application splits its state into two pieces: global shared state that lasts for the
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entire lifetime of the application, and a stack of smaller states, only one of which is active
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at a time. For example, imagine an application to view a map. The shared state would include
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the map and pre-rendered geometry for it. The individual states might start with a splash
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screen or menu to choose a map, then a map viewer, then maybe a state to drill down into pieces
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of the map.</p>
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</div><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
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<table><tr class='module-item'><td><a class="struct" href="struct.App.html" title='widgetry::app_state::App struct'>App</a></td><td class='docblock-short'></td></tr></table><h2 id='enums' class='section-header'><a href="#enums">Enums</a></h2>
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<table><tr class='module-item'><td><a class="enum" href="enum.DrawBaselayer.html" title='widgetry::app_state::DrawBaselayer enum'>DrawBaselayer</a></td><td class='docblock-short'><p>Before <code>State::draw</code> is called, draw something else.</p>
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</td></tr><tr class='module-item'><td><a class="enum" href="enum.Transition.html" title='widgetry::app_state::Transition enum'>Transition</a></td><td class='docblock-short'><p>When a state responds to an event, it can specify some way to manipulate the stack of states.</p>
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</td></tr></table><h2 id='traits' class='section-header'><a href="#traits">Traits</a></h2>
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<table><tr class='module-item'><td><a class="trait" href="trait.SharedAppState.html" title='widgetry::app_state::SharedAppState trait'>SharedAppState</a></td><td class='docblock-short'><p>Any data that should last the entire lifetime of the application should be stored in the struct
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implementing this trait.</p>
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</td></tr><tr class='module-item'><td><a class="trait" href="trait.State.html" title='widgetry::app_state::State trait'>State</a></td><td class='docblock-short'><p>A temporary state of an application. There's a stack of these, with the most recent being the
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active one.</p>
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