From 5524786bd1e0c1c7b041c6053691f4c7c9e3eab6 Mon Sep 17 00:00:00 2001
From: Kevin Midboe <kevin.midboe@gmail.com>
Date: Sat, 29 Jul 2023 13:39:02 +0200
Subject: [PATCH] UI element segment controls for page content selection

---
 src/lib/components/SegmentedControls.svelte | 154 ++++++++++++++++++++
 1 file changed, 154 insertions(+)
 create mode 100644 src/lib/components/SegmentedControls.svelte

diff --git a/src/lib/components/SegmentedControls.svelte b/src/lib/components/SegmentedControls.svelte
new file mode 100644
index 0000000..3a26b2c
--- /dev/null
+++ b/src/lib/components/SegmentedControls.svelte
@@ -0,0 +1,154 @@
+<script lang="ts">
+	import { createEventDispatcher } from 'svelte';
+	const dispatch = createEventDispatcher();
+
+	export let segments: string[] = [];
+	let selected: string = segments[0];
+
+	function emitChange(event: Event) {
+		const target = event.target as HTMLInputElement;
+		selected = segments[Number(target.id)];
+
+		dispatch('change', selected);
+	}
+</script>
+
+<div class="segmented-controls">
+	{#each segments as segment, index}
+		{#if selected === segment}
+			<input id={String(index)} name={segment} type="radio" on:change={emitChange} checked />
+		{:else}
+			<input id={String(index)} name={segment} type="radio" on:change={emitChange} />
+		{/if}
+
+		<label for={String(index)}>{segment}</label>
+	{/each}
+</div>
+
+<style lang="scss">
+	/* 
+   * Adjust z-index of last label since that contains 
+   * the paddle that needs to go beneath all other labels 
+   */
+	.segmented-controls label:last-of-type {
+		z-index: 1;
+	}
+
+	/*
+   * Paddle 
+   */
+	.segmented-controls label:last-of-type::after {
+		content: '';
+		position: absolute;
+		top: 0;
+		right: 0;
+		bottom: 0;
+		left: 0;
+		z-index: -2;
+		background-color: black;
+		transition: inherit;
+	}
+
+	/*
+   * Move paddle depending on which option is selected
+   */
+	@for $i from 1 through 9 {
+		.segmented-controls input:nth-last-of-type(#{$i + 1}):checked ~ label:last-of-type::after {
+			transform: translateX($i * -100%);
+		}
+	}
+
+	/*
+   * Container
+   */
+	.segmented-controls {
+		display: flex;
+		margin: 0 auto;
+		overflow: hidden;
+		transition: all 0.3s ease;
+		top: 67px;
+		border-radius: 1rem;
+		min-height: 2rem;
+		padding: 0.25rem;
+		margin-bottom: 2rem;
+		z-index: 10;
+		background-color: var(--highlight);
+
+		/*
+     * Labels 
+     */
+		label {
+			grid-row: 1;
+			display: flex;
+			justify-content: center;
+			align-items: center;
+			text-align: center;
+			cursor: pointer;
+			flex: 1 1 0px;
+			position: relative;
+			z-index: 2;
+			transition: inherit;
+			text-transform: capitalize;
+
+			font-size: 1rem;
+			font-family: -apple-system, BlinkMacSystemFont, sans-serif;
+			font-weight: 500;
+			line-height: 1;
+			padding: 1rem;
+		}
+
+		/*
+     * Dividers
+     */
+		label:not(:first-of-type)::before {
+			content: '';
+			position: absolute;
+			z-index: -3;
+			top: 0.5rem;
+			left: 0;
+			bottom: 0.5rem;
+			width: 1px;
+			background: rgba(0, 0, 0, 0.15);
+			transition: inherit;
+		}
+
+		/*
+     * Vissualy hidden radiobuttons
+     */
+		input {
+			position: absolute !important;
+			height: 1px;
+			width: 1px;
+			overflow: hidden;
+			clip: rect(1px 1px 1px 1px); /* IE6, IE7 */
+			clip: rect(1px, 1px, 1px, 1px);
+			white-space: nowrap; /* added line */
+		}
+
+		/*
+     * Hide dividers before and after the selected option
+     */
+		input:checked + label::before,
+		input:checked + label + input + label::before {
+			opacity: 0;
+		}
+
+		/*
+     * Focus style for keyboard navigation
+     */
+
+		input:focus + label {
+			box-shadow: 0 0 0 0.2rem rgba(0, 122, 255, 0.75);
+		}
+
+		/*
+     * Paddle
+     */
+		label:last-of-type::after {
+			background: var(--background);
+			border-radius: 0.92rem;
+			border: 0.5px solid rgba(0, 0, 0, 0.04);
+			box-shadow: 0px 2px 1px rgba(0, 0, 0, 0.04), 0px 2px 3px rgba(0, 0, 0, 0.12);
+		}
+	}
+</style>