<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="API documentation for the Rust `Dropdown` struct in crate `widgetry`."><metaname="keywords"content="rust, rustlang, rust-lang, Dropdown"><title>Dropdown in widgetry::widgets::dropdown - Rust</title><linkrel="stylesheet"type="text/css"href="../../../normalize.css"><linkrel="stylesheet"type="text/css"href="../../../rustdoc.css"id="mainThemeStyle"><linkrel="stylesheet"type="text/css"href="../../../light.css"id="themeStyle"><linkrel="stylesheet"type="text/css"href="../../../dark.css"disabled><linkrel="stylesheet"type="text/css"href="../../../ayu.css"disabled><scriptid="default-settings"></script><scriptsrc="../../../storage.js"></script><scriptsrc="../../../crates.js"></script><scriptdefersrc="../../../main.js"></script>
<noscript><linkrel="stylesheet"href="../../../noscript.css"></noscript><linkrel="alternate icon"type="image/png"href="../../../favicon-16x16.png"><linkrel="alternate icon"type="image/png"href="../../../favicon-32x32.png"><linkrel="icon"type="image/svg+xml"href="../../../favicon.svg"><styletype="text/css">#crate-search{background-image:url("../../../down-arrow.svg");}</style></head><bodyclass="rustdoc struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="sidebar"><divclass="sidebar-menu"role="button">☰</div><ahref='../../../widgetry/index.html'><divclass='logo-container rust-logo'><imgsrc='../../../rust-logo.png'alt='logo'></div></a><h2class="location">Struct Dropdown</h2><divclass="sidebar-elems"><divclass="block items"><h3class="sidebar-title"><ahref="#fields">Fields</a></h3><divclass="sidebar-links"><ahref="#structfield.btn">btn</a><ahref="#structfield.choices">choices</a><ahref="#structfield.current_idx">current_idx</a><ahref="#structfield.is_persisten_split">is_persisten_split</a><ahref="#structfield.label">label</a><ahref="#structfield.menu">menu</a></div><h3class="sidebar-title"><ahref="#implementations">Methods</a></h3><divclass="sidebar-links"><ahref="#method.current_value">current_value</a><ahref="#method.current_value_label">current_value_label</a><ahref="#method.new">new</a><ahref="#method.open_menu">open_menu</a></div><h3class="sidebar-title"><ahref="#trait-implementations">Trait Implementations</a></h3><divclass="sidebar-links"><ahref="#impl-WidgetImpl">WidgetImpl</a></div><h3class="sidebar-title"><ahref="#synthetic-implementations">Auto Trait Implementations</a></h3><divclass="sidebar-links"><ahref="#impl-RefUnwindSafe">RefUnwindSafe</a><ahref="#impl-Send">!Send</a><ahref="#impl-Sync">!Sync</a><ahref="#impl-Unpin">Unpin</a><ahref="#impl-UnwindSafe">UnwindSafe</a></div><h3class="sidebar-title"><ahref="#blanket-implementations">Blanket Implementations</a></h3><divclass="sidebar-links"><ahref="#impl-Any">Any</a><ahref="#impl-Borrow%3CT%3E">Borrow<T></a><ahref="#impl-BorrowMut%3CT%3E">BorrowMut<T></a><ahref="#impl-Downcast">Downcast</a><ahref="#impl-From%3CT%3E">From<T></a><ahref="#impl-Into%3CU%3E">Into<U></a><ahref="#impl-Same%3CT%3E">Same<T></a><ahref="#impl-TryFrom%3CU%3E">TryFrom<U></a><ahref="#impl-TryInto%3CU%3E">TryInto<U></a></div></div><h2class="location">Other items in<br><ahref="../../index.html">widgetry</a>::<wbr><ahref="../index.html">widgets</a>::<wbr><ahref="index.html">dropdown</a></h2><divid="sidebar-vars"data-name="Dropdown"data-ty="struct"data-relpath=""></div><scriptdefersrc="sidebar-items.js"></script></div></nav><divclass="theme-picker"><buttonid="theme-picker"aria-label="Pick another theme!"aria-haspopup="menu"title="themes"><imgwidth="18"height="18"alt="Pick another theme!"src="../../../brush.svg"></button><divid="theme-choices"role="menu"></div></div><navclass="sub"><formclass="search-form"><divclass="search-container"><div><selectid="crate-search"><optionvalue="All crates">All crates</option></select><inputclass="search-input"name="search"autocomplete="off"spellcheck="false"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"></div><buttontype="button"id="help-button"title="help">?</button><aid="settings-menu"href="../../../settings.html"title="settings"><imgwidth="18"height="18"alt="Change settings"src="../../../wheel.svg"></a></div></form></nav><sectionid="main"class="content"><h1class="fqn"><spanclass="in-band">Struct <ahref="../../index.html">widgetry</a>::<wbr><ahref="../index.html">widgets</a>::<wbr><ahref="index.html">dropdown</a>::<wbr><aclass="struct"href="#">Dropdown</a><buttonid="copy-path"onclick="copy_path(this)"title="Copy item path to clipboard"><imgsrc="../../../clipboard.svg"width="19"height="18"alt="Copy item path"></button></span><spanclass="out-of-band"><spanid
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.set_pos"class="method trait-impl has-srclink"><divclass="rightside"><aclass="srclink"href="../../../src/widgetry/widgets/dropdown.rs.html#88-90"title="goto source code">[src]</a></div><ahref="#method.set_pos"class="anchor"></a><h4class="code-header">fn <ahref="../trait.WidgetImpl.html#tymethod.set_pos"class="fnname">set_pos</a>(&mut self, top_left: <aclass="struct"href="../../screen_geom/struct.ScreenPt.html"title="struct widgetry::screen_geom::ScreenPt">ScreenPt</a>)</h4></div></summary><divclass='docblock'><p>Your widget’s top left corner should be here. Handle mouse events and draw appropriately.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.event"class="method trait-impl has-srclink"><divclass="rightside"><aclass="srclink"href="../../../src/widgetry/widgets/dropdown.rs.html#92-131"title="goto source code">[src]</a></div><ahref="#method.event"class="anchor"></a><h4class="code-header">fn <ahref="../trait.WidgetImpl.html#tymethod.event"class="fnname">event</a>(&mut self, ctx: &mut <aclass="struct"href="../../event_ctx/struct.EventCtx.html"title="struct widgetry::event_ctx::EventCtx">EventCtx</a><'_>, output: &mut <aclass="struct"href="../struct.WidgetOutput.html"title="struct widgetry::widgets::WidgetOutput">WidgetOutput</a>)</h4></div></summary><divclass='docblock'><p>Your chance to react to an event. Any side effects outside of this widget are communicated
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.draw"class="method trait-impl has-srclink"><divclass="rightside"><aclass="srclink"href="../../../src/widgetry/widgets/dropdown.rs.html#133-164"title="goto source code">[src]</a></div><ahref="#method.draw"class="anchor"></a><h4class="code-header">fn <ahref="../trait.WidgetImpl.html#tymethod.draw"class="fnname">draw</a>(&self, g: &mut <aclass="struct"href="../../drawing/struct.GfxCtx.html"title="struct widgetry::drawing::GfxCtx">GfxCtx</a><'_>)</h4></div></summary><divclass='docblock'><p>Draw the widget. Be sure to draw relative to the top-left specified by <code>set_pos</code>.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.can_restore"class="method trait-impl has-srclink"><divclass="rightside"><aclass="srclink"href="../../../src/widgetry/widgets/dropdown.rs.html#166-168"title="goto source code">[src]</a></div><ahref="#method.can_restore"class="anchor"></a><h4class="code-header">fn <ahref="../trait.WidgetImpl.html#method.can_restore"class="fnname">can_restore</a>(&self) -><aclass="primitive"href="https://doc.rust-lang.org/1.58.0/std/primitive.bool.html">bool</a></h4></div></summary><divclass='docblock'><p>If a new Panel is being created to replace an older one, all widgets have the chance to
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.restore"class="method trait-impl has-srclink"><divclass="rightside"><aclass="srclink"href="../../../src/widgetry/widgets/dropdown.rs.html#169-176"title="goto source code">[src]</a></div><ahref="#method.restore"class="anchor"></a><h4class="code-header">fn <ahref="../trait.WidgetImpl.html#method.restore"class="fnname">restore</a>(&mut self, ctx: &mut <aclass="struct"href="../../event_ctx/struct.EventCtx.html"title="struct widgetry::event_ctx::EventCtx">EventCtx</a><'_>, prev: &dyn <aclass="trait"href="../trait.WidgetImpl.html"title="trait widgetry::widgets::WidgetImpl">WidgetImpl</a>)</h4></div></summary><divclass='docblock'><p>Restore state from the previous version of this widget, with the same ID. Implementors must
then be further <code>downcast</code> into <code>Box<ConcreteType></code> where <code>ConcreteType</code> implements <code>Trait</code>. <ahref="#tymethod.into_any">Read more</a></p>
further <code>downcast</code> into <code>Rc<ConcreteType></code> where <code>ConcreteType</code> implements <code>Trait</code>. <ahref="#tymethod.into_any_rc">Read more</a></p>
</div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"open><summary><divid="impl-TryFrom%3CU%3E"class="impl has-srclink"><divclass="rightside"><aclass="srclink"href="https://doc.rust-lang.org/1.58.0/src/core/convert/mod.rs.html#587-596"title="goto source code">[src]</a></div><ahref="#impl-TryFrom%3CU%3E"class="anchor"></a><h3class="code-header in-band">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/1.58.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U> for T <spanclass="where fmt-newline">where<br> U: <aclass="trait"href="https://doc.rust-lang.org/1.58.0/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><T>, </span></h3></div></summary><divclass="impl-items"><detailsclass="rustdoc-toggle"open><summary><divid="associatedtype.Error"class="type trait-impl has-srclink"><ahref="#associatedtype.Error"class="anchor"></a><h4class="code-header">type <ahref="https://doc.rust-lang.org/1.58.0/core/convert/trait.TryFrom.html#associatedtype.Error"class="type">Error</a> = <aclass="enum"href="https://doc.rust-lang.org/1.58.0/core/convert/enum.Infallible.html"title="enum core::convert::Infallible">Infallible</a></h4></div></summary><divclass='docblock'><p>The type returned in the event of a conversion error.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.try_from"class="method trait-impl has-srclink"><divclass="rightside"><aclass="srclink"href="https://doc.rust-lang.org/1.58.0/src/core/convert/mod.rs.html#593"title="goto source code">[src]</a></div><ahref="#method.try_from"class="anchor"></a><h4class="code-header">pub fn <ahref="https://doc.rust-lang.org/1.58.0/core/convert/trait.TryFrom.html#tymethod.try_from"class="fnname">try_from</a>(value: U) -><aclass="enum"href="https://doc.rust-lang.org/1.58.0/core/result/enum.Result.html"title="enum core::result::Result">Result</a><T, <T as <aclass="trait"href="https://doc.rust-lang.org/1.58.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U>>::<aclass="type"href="https://doc.rust-lang.org/1.58.0/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a>></h4></div></summary><divclass='docblock'><p>Performs the conversion.</p>
</div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"open><summary><divid="impl-TryInto%3CU%3E"class="impl has-srclink"><divclass="rightside"><aclass="srclink"href="https://doc.rust-lang.org/1.58.0/src/core/convert/mod.rs.html#573-582"title="goto source code">[src]</a></div><ahref="#impl-TryInto%3CU%3E"class="anchor"></a><h3class="code-header in-band">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/1.58.0/core/convert/trait.TryInto.html"title="trait core::convert::TryInto">TryInto</a><U> for T <spanclass="where fmt-newline">where<br> U: <aclass="trait"href="https://doc.rust-lang.org/1.58.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>, </span></h3></div></summary><divclass="impl-items"><detailsclass="rustdoc-toggle"open><summary><divid="associatedtype.Error-1"class="type trait-impl has-srclink"><ahref="#associatedtype.Error-1"class="anchor"></a><h4class="code-header">type <ahref="https://doc.rust-lang.org/1.58.0/core/convert/trait.TryInto.html#associatedtype.Error"class="type">Error</a> = <U as <aclass="trait"href="https://doc.rust-lang.org/1.58.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="type"href="https://doc.rust-lang.org/1.58.0/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a></h4></div></summary><divclass='docblock'><p>The type returned in the event of a conversion error.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><divid="method.try_into"class="method trait-impl has-srclink"><divclass="rightside"><aclass="srclink"href="https://doc.rust-lang.org/1.58.0/src/core/convert/mod.rs.html#579"title="goto source code">[src]</a></div><ahref="#method.try_into"class="anchor"></a><h4class="code-header">pub fn <ahref="https://doc.rust-lang.org/1.58.0/core/convert/trait.TryInto.html#tymethod.try_into"class="fnname">try_into</a>(self) -><aclass="enum"href="https://doc.rust-lang.org/1.58.0/core/result/enum.Result.html"title="enum core::result::Result">Result</a><U, <U as <aclass="trait"href="https://doc.rust-lang.org/1.58.0/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="type"href="https://doc.rust-lang.org/1.58.0/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a>></h4></div></summary><divclass='docblock'><p>Performs the conversion.</p>
