<!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="Source of the Rust file `widgetry/src/screen_geom.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>screen_geom.rs - source</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 id="default-settings" ></script><script src="../../storage.js"></script><script src="../../crates.js"></script><script defer src="../../main.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script> 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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" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" id="help-button" title="help">?</button><a id="settings-menu" href="../../settings.html" title="settings"><img width="18" height="18" alt="Change settings" src="../../wheel.svg"></a></div></form></nav><section id="main" class="content"><div class="example-wrap"><pre class="line-numbers"><span id="1"> 1</span> <span id="2"> 2</span> <span id="3"> 3</span> <span id="4"> 4</span> <span id="5"> 5</span> <span id="6"> 6</span> <span id="7"> 7</span> <span id="8"> 8</span> <span id="9"> 9</span> <span id="10"> 10</span> <span id="11"> 11</span> <span id="12"> 12</span> <span id="13"> 13</span> <span id="14"> 14</span> <span id="15"> 15</span> <span 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id="210">210</span> <span id="211">211</span> <span id="212">212</span> <span id="213">213</span> <span id="214">214</span> <span id="215">215</span> <span id="216">216</span> </pre><pre class="rust"><code><span class="kw">use</span> <span class="ident">serde</span>::{<span class="ident">Deserialize</span>, <span class="ident">Serialize</span>}; <span class="kw">use</span> <span class="ident">geom</span>::{<span class="ident">trim_f64</span>, <span class="ident">Polygon</span>, <span class="ident">Pt2D</span>}; <span class="kw">use</span> <span class="kw">crate</span>::{<span class="ident">Canvas</span>, <span class="ident">EdgeInsets</span>}; <span class="doccomment">/// ScreenPt is in units of logical pixels, as opposed to physical pixels.</span> <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">PartialEq</span>)]</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ScreenPt</span> { <span class="kw">pub</span> <span class="ident">x</span>: <span class="ident">f64</span>, <span class="kw">pub</span> <span class="ident">y</span>: <span class="ident">f64</span>, } <span class="kw">impl</span> <span class="ident">ScreenPt</span> { <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">x</span>: <span class="ident">f64</span>, <span class="ident">y</span>: <span class="ident">f64</span>) -> <span class="ident">ScreenPt</span> { <span class="ident">ScreenPt</span> { <span class="ident">x</span>, <span class="ident">y</span> } } <span class="comment">// The geom layer operates in map-space, but currently reusing lots of geom abstractions for</span> <span class="comment">// screen-space.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_pt</span>(<span class="self">self</span>) -> <span class="ident">Pt2D</span> { <span class="ident">Pt2D::new</span>(<span class="self">self</span>.<span class="ident">x</span>, <span class="self">self</span>.<span class="ident">y</span>) } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">zero</span>() -> <span class="self">Self</span> { <span class="self">Self</span> { <span class="ident">x</span>: <span class="number">0.0</span>, <span class="ident">y</span>: <span class="number">0.0</span> } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">translated</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">x</span>: <span class="ident">f64</span>, <span class="ident">y</span>: <span class="ident">f64</span>) -> <span class="self">Self</span> { <span class="self">Self</span> { <span class="ident">x</span>: <span class="self">self</span>.<span class="ident">x</span> <span class="op">+</span> <span class="ident">x</span>, <span class="ident">y</span>: <span class="self">self</span>.<span class="ident">y</span> <span class="op">+</span> <span class="ident">y</span>, } } } <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">winit::dpi::LogicalPosition</span><span class="op"><</span><span class="ident">f64</span><span class="op">></span><span class="op">></span> <span class="kw">for</span> <span class="ident">ScreenPt</span> { <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">lp</span>: <span class="ident">winit::dpi::LogicalPosition</span><span class="op"><</span><span class="ident">f64</span><span class="op">></span>) -> <span class="ident">ScreenPt</span> { <span class="ident">ScreenPt</span> { <span class="ident">x</span>: <span class="ident">lp</span>.<span class="ident">x</span>, <span class="ident">y</span>: <span class="ident">lp</span>.<span class="ident">y</span> } } } <span class="doccomment">/// ScreenRectangle is in units of logical pixels, as opposed to physical pixels.</span> <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Debug</span>)]</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ScreenRectangle</span> { <span class="kw">pub</span> <span class="ident">x1</span>: <span class="ident">f64</span>, <span class="kw">pub</span> <span class="ident">y1</span>: <span class="ident">f64</span>, <span class="kw">pub</span> <span class="ident">x2</span>: <span class="ident">f64</span>, <span class="kw">pub</span> <span class="ident">y2</span>: <span class="ident">f64</span>, } <span class="kw">impl</span> <span class="ident">ScreenRectangle</span> { <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">top_left</span>(<span class="ident">top_left</span>: <span class="ident">ScreenPt</span>, <span class="ident">dims</span>: <span class="ident">ScreenDims</span>) -> <span class="ident">ScreenRectangle</span> { <span class="ident">ScreenRectangle</span> { <span class="ident">x1</span>: <span class="ident">top_left</span>.<span class="ident">x</span>, <span class="ident">y1</span>: <span class="ident">top_left</span>.<span class="ident">y</span>, <span class="ident">x2</span>: <span class="ident">top_left</span>.<span class="ident">x</span> <span class="op">+</span> <span class="ident">dims</span>.<span class="ident">width</span>, <span class="ident">y2</span>: <span class="ident">top_left</span>.<span class="ident">y</span> <span class="op">+</span> <span class="ident">dims</span>.<span class="ident">height</span>, } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">placeholder</span>() -> <span class="ident">ScreenRectangle</span> { <span class="ident">ScreenRectangle</span> { <span class="ident">x1</span>: <span class="number">0.0</span>, <span class="ident">y1</span>: <span class="number">0.0</span>, <span class="ident">x2</span>: <span class="number">0.0</span>, <span class="ident">y2</span>: <span class="number">0.0</span>, } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">contains</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">pt</span>: <span class="ident">ScreenPt</span>) -> <span class="ident">bool</span> { <span class="ident">pt</span>.<span class="ident">x</span> <span class="op">></span><span class="op">=</span> <span class="self">self</span>.<span class="ident">x1</span> <span class="op">&&</span> <span class="ident">pt</span>.<span class="ident">x</span> <span class="op"><</span><span class="op">=</span> <span class="self">self</span>.<span class="ident">x2</span> <span class="op">&&</span> <span class="ident">pt</span>.<span class="ident">y</span> <span class="op">></span><span class="op">=</span> <span class="self">self</span>.<span class="ident">y1</span> <span class="op">&&</span> <span class="ident">pt</span>.<span class="ident">y</span> <span class="op"><</span><span class="op">=</span> <span class="self">self</span>.<span class="ident">y2</span> } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">pt_to_percent</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">pt</span>: <span class="ident">ScreenPt</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span>(<span class="ident">f64</span>, <span class="ident">f64</span>)<span class="op">></span> { <span class="kw">if</span> <span class="self">self</span>.<span class="ident">contains</span>(<span class="ident">pt</span>) { <span class="prelude-val">Some</span>(( (<span class="ident">pt</span>.<span class="ident">x</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">x1</span>) <span class="op">/</span> <span class="self">self</span>.<span class="ident">width</span>(), (<span class="ident">pt</span>.<span class="ident">y</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">y1</span>) <span class="op">/</span> <span class="self">self</span>.<span class="ident">height</span>(), )) } <span class="kw">else</span> { <span class="prelude-val">None</span> } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">percent_to_pt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">x</span>: <span class="ident">f64</span>, <span class="ident">y</span>: <span class="ident">f64</span>) -> <span class="ident">ScreenPt</span> { <span class="ident">ScreenPt::new</span>(<span class="self">self</span>.<span class="ident">x1</span> <span class="op">+</span> <span class="ident">x</span> <span class="op">*</span> <span class="self">self</span>.<span class="ident">width</span>(), <span class="self">self</span>.<span class="ident">y1</span> <span class="op">+</span> <span class="ident">y</span> <span class="op">*</span> <span class="self">self</span>.<span class="ident">height</span>()) } <span class="comment">// TODO Remove these in favor of dims()</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">width</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">f64</span> { <span class="self">self</span>.<span class="ident">x2</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">x1</span> } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">height</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">f64</span> { <span class="self">self</span>.<span class="ident">y2</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">y1</span> } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">dims</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">ScreenDims</span> { <span class="ident">ScreenDims::new</span>(<span class="self">self</span>.<span class="ident">x2</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">x1</span>, <span class="self">self</span>.<span class="ident">y2</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">y1</span>) } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">center</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">ScreenPt</span> { <span class="ident">ScreenPt::new</span>((<span class="self">self</span>.<span class="ident">x1</span> <span class="op">+</span> <span class="self">self</span>.<span class="ident">x2</span>) <span class="op">/</span> <span class="number">2.0</span>, (<span class="self">self</span>.<span class="ident">y1</span> <span class="op">+</span> <span class="self">self</span>.<span class="ident">y2</span>) <span class="op">/</span> <span class="number">2.0</span>) } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_polygon</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">Polygon</span> { <span class="ident">Polygon::rectangle</span>(<span class="self">self</span>.<span class="ident">width</span>(), <span class="self">self</span>.<span class="ident">height</span>()).<span class="ident">translate</span>(<span class="self">self</span>.<span class="ident">x1</span>, <span class="self">self</span>.<span class="ident">y1</span>) } } <span class="comment">// REVIEW: Rename to something shorter? e.g. Dims / Size</span> <span class="doccomment">/// ScreenDims is in units of logical pixels, as opposed to physical pixels.</span> <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">PartialEq</span>, <span class="ident">Serialize</span>, <span class="ident">Deserialize</span>)]</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ScreenDims</span> { <span class="kw">pub</span> <span class="ident">width</span>: <span class="ident">f64</span>, <span class="kw">pub</span> <span class="ident">height</span>: <span class="ident">f64</span>, } <span class="kw">impl</span> <span class="ident">ScreenDims</span> { <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">width</span>: <span class="ident">f64</span>, <span class="ident">height</span>: <span class="ident">f64</span>) -> <span class="ident">ScreenDims</span> { <span class="ident">ScreenDims</span> { <span class="ident">width</span>: <span class="ident">trim_f64</span>(<span class="ident">width</span>), <span class="ident">height</span>: <span class="ident">trim_f64</span>(<span class="ident">height</span>), } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">zero</span>() -> <span class="self">Self</span> { <span class="ident">ScreenDims</span> { <span class="ident">width</span>: <span class="number">0.0</span>, <span class="ident">height</span>: <span class="number">0.0</span>, } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">square</span>(<span class="ident">square</span>: <span class="ident">f64</span>) -> <span class="self">Self</span> { <span class="ident"><span class="self">Self</span>::new</span>(<span class="ident">square</span>, <span class="ident">square</span>) } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">pad</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">edge_insets</span>: <span class="ident">EdgeInsets</span>) -> <span class="self">Self</span> { <span class="self">Self</span> { <span class="ident">width</span>: <span class="self">self</span>.<span class="ident">width</span> <span class="op">+</span> <span class="ident">edge_insets</span>.<span class="ident">left</span> <span class="op">+</span> <span class="ident">edge_insets</span>.<span class="ident">right</span>, <span class="ident">height</span>: <span class="self">self</span>.<span class="ident">height</span> <span class="op">+</span> <span class="ident">edge_insets</span>.<span class="ident">top</span> <span class="op">+</span> <span class="ident">edge_insets</span>.<span class="ident">bottom</span>, } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">top_left_for_corner</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">corner</span>: <span class="ident">ScreenPt</span>, <span class="ident">canvas</span>: <span class="kw-2">&</span><span class="ident">Canvas</span>) -> <span class="ident">ScreenPt</span> { <span class="comment">// TODO Ideally also avoid covered canvas areas</span> <span class="kw">if</span> <span class="ident">corner</span>.<span class="ident">x</span> <span class="op">+</span> <span class="self">self</span>.<span class="ident">width</span> <span class="op"><</span> <span class="ident">canvas</span>.<span class="ident">window_width</span> { <span class="comment">// corner.x is the left corner</span> <span class="kw">if</span> <span class="ident">corner</span>.<span class="ident">y</span> <span class="op">+</span> <span class="self">self</span>.<span class="ident">height</span> <span class="op"><</span> <span class="ident">canvas</span>.<span class="ident">window_height</span> { <span class="comment">// corner.y is the top corner</span> <span class="ident">corner</span> } <span class="kw">else</span> { <span class="comment">// corner.y is the bottom corner</span> <span class="ident">ScreenPt::new</span>(<span class="ident">corner</span>.<span class="ident">x</span>, <span class="ident">corner</span>.<span class="ident">y</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">height</span>) } } <span class="kw">else</span> { <span class="comment">// corner.x is the right corner</span> <span class="kw">if</span> <span class="ident">corner</span>.<span class="ident">y</span> <span class="op">+</span> <span class="self">self</span>.<span class="ident">height</span> <span class="op"><</span> <span class="ident">canvas</span>.<span class="ident">window_height</span> { <span class="comment">// corner.y is the top corner</span> <span class="ident">ScreenPt::new</span>(<span class="ident">corner</span>.<span class="ident">x</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">width</span>, <span class="ident">corner</span>.<span class="ident">y</span>) } <span class="kw">else</span> { <span class="comment">// corner.y is the bottom corner</span> <span class="ident">ScreenPt::new</span>(<span class="ident">corner</span>.<span class="ident">x</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">width</span>, <span class="ident">corner</span>.<span class="ident">y</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">height</span>) } } } } <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">winit::dpi::LogicalSize</span><span class="op"><</span><span class="ident">f64</span><span class="op">></span><span class="op">></span> <span class="kw">for</span> <span class="ident">ScreenDims</span> { <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">size</span>: <span class="ident">winit::dpi::LogicalSize</span><span class="op"><</span><span class="ident">f64</span><span class="op">></span>) -> <span class="ident">ScreenDims</span> { <span class="ident">ScreenDims</span> { <span class="ident">width</span>: <span class="ident">size</span>.<span class="ident">width</span>, <span class="ident">height</span>: <span class="ident">size</span>.<span class="ident">height</span>, } } } <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">ScreenDims</span><span class="op">></span> <span class="kw">for</span> <span class="ident">winit::dpi::LogicalSize</span><span class="op"><</span><span class="ident">f64</span><span class="op">></span> { <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">dims</span>: <span class="ident">ScreenDims</span>) -> <span class="ident">winit::dpi::LogicalSize</span><span class="op"><</span><span class="ident">f64</span><span class="op">></span> { <span class="ident">winit::dpi::LogicalSize::new</span>(<span class="ident">dims</span>.<span class="ident">width</span>, <span class="ident">dims</span>.<span class="ident">height</span>) } } <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">f64</span><span class="op">></span> <span class="kw">for</span> <span class="ident">ScreenDims</span> { <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">square</span>: <span class="ident">f64</span>) -> <span class="ident">ScreenDims</span> { <span class="ident">ScreenDims::square</span>(<span class="ident">square</span>) } } <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">i64</span><span class="op">></span> <span class="kw">for</span> <span class="ident">ScreenDims</span> { <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">square</span>: <span class="ident">i64</span>) -> <span class="ident">ScreenDims</span> { <span class="ident">ScreenDims::square</span>(<span class="ident">square</span> <span class="kw">as</span> <span class="ident">f64</span>) } } <span class="doccomment">/// (Width, Height) -> ScreenDims</span> <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span>(<span class="ident">f64</span>, <span class="ident">f64</span>)<span class="op">></span> <span class="kw">for</span> <span class="ident">ScreenDims</span> { <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">width_and_height</span>: (<span class="ident">f64</span>, <span class="ident">f64</span>)) -> <span class="ident">ScreenDims</span> { <span class="ident">ScreenDims::new</span>(<span class="ident">width_and_height</span>.<span class="number">0</span>, <span class="ident">width_and_height</span>.<span class="number">1</span>) } } <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">geom::Bounds</span><span class="op">></span> <span class="kw">for</span> <span class="ident">ScreenDims</span> { <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">bounds</span>: <span class="ident">geom::Bounds</span>) -> <span class="self">Self</span> { <span class="ident">ScreenDims::new</span>(<span class="ident">bounds</span>.<span class="ident">width</span>(), <span class="ident">bounds</span>.<span class="ident">height</span>()) } } <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">ScreenDims</span><span class="op">></span> <span class="kw">for</span> <span class="ident">stretch::geometry::Size</span><span class="op"><</span><span class="ident">stretch::style::Dimension</span><span class="op">></span> { <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">dims</span>: <span class="ident">ScreenDims</span>) -> <span class="self">Self</span> { <span class="self">Self</span> { <span class="ident">width</span>: <span class="ident">stretch::style::Dimension::Points</span>(<span class="ident">dims</span>.<span class="ident">width</span> <span class="kw">as</span> <span class="ident">f32</span>), <span class="ident">height</span>: <span class="ident">stretch::style::Dimension::Points</span>(<span class="ident">dims</span>.<span class="ident">height</span> <span class="kw">as</span> <span class="ident">f32</span>), } } } </code></pre></div> 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