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Robert Jelic
2025-09-16 17:41:40 +02:00
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docs/.vitepress/dist/assets/guides_reactive.md.DFOvn3Jj.js vendored Normal file
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import{_ as i,a,b as e,ag as t}from"./chunks/framework.BcrMLAmg.js";const o=JSON.parse('{"title":"Reactive System","description":"","frontmatter":{},"headers":[],"relativePath":"guides/reactive.md","filePath":"guides/reactive.md","lastUpdated":1744373216000}'),n={name:"guides/reactive.md"};function l(h,s,k,p,r,E){return e(),a("div",null,s[0]||(s[0]=[t(`<h1 id="reactive-system" tabindex="-1">Reactive System <a class="header-anchor" href="#reactive-system" aria-label="Permalink to &quot;Reactive System&quot;">​</a></h1><p>The reactive system in Basalt allows you to create dynamic property values using expressions. These expressions automatically update when related values change.</p><h2 id="basic-usage" tabindex="-1">Basic Usage <a class="header-anchor" href="#basic-usage" aria-label="Permalink to &quot;Basic Usage&quot;">​</a></h2><div class="language-lua vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">lua</span><pre class="shiki shiki-themes github-light github-dark vp-code" tabindex="0"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">local</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> basalt </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> require</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&quot;basalt&quot;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">-- Create a simple label and center it horizontally</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">local</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> main </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> basalt.</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">getMainFrame</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> :</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">addLabel</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> :</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">setText</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&quot;Hello World&quot;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> :</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">setX</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&quot;{parent.width / 2 - self.width / 2}&quot;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">-- Centers the label horizontally</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">-- Create a progress bar that takes 80% of parent width</span></span>
<span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">main</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">addProgressbar</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> :</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">setWidth</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&quot;{parent.width * 0.8}&quot;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> :</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">setX</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&quot;{parent.width * 0.1}&quot;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">-- 10% margin on both sides</span></span></code></pre></div><h2 id="available-variables" tabindex="-1">Available Variables <a class="header-anchor" href="#available-variables" aria-label="Permalink to &quot;Available Variables&quot;">​</a></h2><p>In reactive expressions, you have access to:</p><ul><li><code>self</code> - The current element</li><li><code>parent</code> - The parent element</li><li><code>elementName</code> - A given name of a element</li><li>Any property of these elements (width, height, value, text, etc.)</li></ul><h2 id="common-use-cases" tabindex="-1">Common Use Cases <a class="header-anchor" href="#common-use-cases" aria-label="Permalink to &quot;Common Use Cases&quot;">​</a></h2><h3 id="responsive-layout" tabindex="-1">Responsive Layout <a class="header-anchor" href="#responsive-layout" aria-label="Permalink to &quot;Responsive Layout&quot;">​</a></h3><div class="language-lua vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">lua</span><pre class="shiki shiki-themes github-light github-dark vp-code" tabindex="0"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">local</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> frame </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> basalt.</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">getMainFrame</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> :</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">addFrame</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> :</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">setSize</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&quot;{parent.width * 0.5}&quot;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&quot;{parent.height * 0.5}&quot;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">-- Takes half of parent size</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> :</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">setPosition</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&quot;{parent.width / 2 - self.width / 2}&quot;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">-- Centers the frame</span></span>
<span class="line"><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &quot;{parent.height / 2 - self.height / 2}&quot;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span></code></pre></div><h3 id="dynamic-sizing" tabindex="-1">Dynamic Sizing <a class="header-anchor" href="#dynamic-sizing" aria-label="Permalink to &quot;Dynamic Sizing&quot;">​</a></h3><div class="language-lua vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">lua</span><pre class="shiki shiki-themes github-light github-dark vp-code" tabindex="0"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">local</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> label </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> frame</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">addLabel</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> :</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">setText</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&quot;Dynamic width based on text&quot;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> :</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">setWidth</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&quot;{#self.text}&quot;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">-- Width equals text length</span></span></code></pre></div><h3 id="linked-properties" tabindex="-1">Linked Properties <a class="header-anchor" href="#linked-properties" aria-label="Permalink to &quot;Linked Properties&quot;">​</a></h3><div class="language-lua vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">lua</span><pre class="shiki shiki-themes github-light github-dark vp-code" tabindex="0"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">local</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> slider </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> frame</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">addSlider</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&quot;mySlider&quot;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> :</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">setPosition</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">2</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">2</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> :</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">setSize</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">10</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">local</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> progress </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> frame</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">addProgressBar</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> :</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">setPosition</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">2</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">4</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> :</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">setSize</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">10</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> :</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">setProgress</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&quot;{mySlider.value}&quot;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">-- Progress syncs with slider value</span></span></code></pre></div><h2 id="syntax" tabindex="-1">Syntax <a class="header-anchor" href="#syntax" aria-label="Permalink to &quot;Syntax&quot;">​</a></h2><ul><li>Use curly braces <code>{}</code> to define a reactive expression</li><li>Basic math operators are supported (+, -, *, /, %)</li><li>Access properties using dot notation (element.property)</li><li>Can use basic functions and comparisons</li></ul><h2 id="best-practices" tabindex="-1">Best Practices <a class="header-anchor" href="#best-practices" aria-label="Permalink to &quot;Best Practices&quot;">​</a></h2><ol><li>Keep expressions simple and readable</li><li>Use meaningful variable names in complex calculations</li><li>Test expressions with different parent sizes</li><li>Consider edge cases (minimum/maximum sizes)</li></ol>`,18)]))}const g=i(n,[["render",l]]);export{o as __pageData,g as default};