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drizzli/src/routes/weather/week/[location]/ChartCustomizer.svelte
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Svelte

<script lang="ts">
import { fade, fly } from 'svelte/transition';
import { type ChartPanel, defaultChartLayout, storedChartLayout } from '$lib/stores/settings';
import { CHART_VARIABLES, VARIABLE_BY_KEY } from './variables';
interface Props {
open: boolean;
onClose: () => void;
}
let { open, onClose }: Props = $props();
// Variables not placed in any panel form the "available" pool.
let usedKeys = $derived(new Set($storedChartLayout.flatMap((p) => p.variables)));
let availableVars = $derived(CHART_VARIABLES.filter((v) => !usedKeys.has(v.key)));
// ─── Drag state ─────────────────────────────────────────────────────────────
let dragKey = $state<string | null>(null);
let dragLabel = $state('');
let dragColor = $state('');
let dragPos = $state({ x: 0, y: 0 });
let dropZone = $state<string | null>(null); // panel id or 'pool'
let dropIndex = $state(0);
let pointerStart: { x: number; y: number } | null = null;
let started = $state(false);
function beginDrag(e: PointerEvent, key: string): void {
const def = VARIABLE_BY_KEY.get(key);
if (!def) return;
pointerStart = { x: e.clientX, y: e.clientY };
started = false;
dragKey = key;
dragLabel = def.label;
dragColor = def.color;
dragPos = { x: e.clientX, y: e.clientY };
(e.currentTarget as HTMLElement).setPointerCapture(e.pointerId);
}
function onDragMove(e: PointerEvent): void {
if (dragKey === null || !pointerStart) return;
if (!started) {
const dx = Math.abs(e.clientX - pointerStart.x);
const dy = Math.abs(e.clientY - pointerStart.y);
if (dx < 5 && dy < 5) return;
started = true;
}
dragPos = { x: e.clientX, y: e.clientY };
const under = document.elementFromPoint(e.clientX, e.clientY);
const zoneEl = under?.closest('[data-zone]') as HTMLElement | null;
if (!zoneEl) {
dropZone = null;
return;
}
dropZone = zoneEl.dataset.zone ?? null;
// Insert before the chip whose centre is to the right of the pointer.
const chips = [...zoneEl.querySelectorAll('[data-chip]')] as HTMLElement[];
let idx = chips.length;
for (let i = 0; i < chips.length; i++) {
const r = chips[i].getBoundingClientRect();
if (e.clientY < r.top || (e.clientY <= r.bottom && e.clientX < r.left + r.width / 2)) {
idx = i;
break;
}
}
dropIndex = idx;
}
function endDrag(e: PointerEvent): void {
if (dragKey === null) return;
const key = dragKey;
const zone = started ? dropZone : null;
(e.currentTarget as HTMLElement)?.releasePointerCapture?.(e.pointerId);
dragKey = null;
pointerStart = null;
if (zone) moveVar(key, zone, dropIndex);
dropZone = null;
}
function moveVar(key: string, toZone: string, toIndex: number): void {
const layout: ChartPanel[] = $storedChartLayout.map((p) => ({
id: p.id,
variables: p.variables.filter((k) => k !== key)
}));
if (toZone !== 'pool') {
const panel = layout.find((p) => p.id === toZone);
if (panel) panel.variables.splice(Math.min(toIndex, panel.variables.length), 0, key);
}
storedChartLayout.set(layout);
}
function removeVar(key: string): void {
moveVar(key, 'pool', 0);
}
function addPanel(): void {
const maxN = $storedChartLayout.reduce((m, p) => {
const n = parseInt(p.id.replace(/\D/g, ''), 10);
return Number.isFinite(n) ? Math.max(m, n) : m;
}, 0);
storedChartLayout.set([...$storedChartLayout, { id: `panel-${maxN + 1}`, variables: [] }]);
}
function deletePanel(id: string): void {
storedChartLayout.set($storedChartLayout.filter((p) => p.id !== id));
}
function resetLayout(): void {
storedChartLayout.set(structuredClone(defaultChartLayout));
}
</script>
<svelte:window
onkeydown={(e) => {
if (e.key === 'Escape' && open && dragKey === null) onClose();
}}
/>
{#if open}
<div class="fixed inset-0 z-50 flex items-stretch justify-center md:items-center md:p-6">
<div
class="absolute inset-0 bg-black/40"
transition:fade={{ duration: 150 }}
onclick={() => dragKey === null && onClose()}
onkeydown={onClose}
role="presentation"
></div>
<div
class="relative flex w-full max-w-3xl flex-col overflow-hidden bg-card shadow-2xl md:rounded-2xl md:border md:border-border"
transition:fly={{ y: 20, duration: 200 }}
>
<div class="flex items-center justify-between border-b border-border px-5 py-4">
<div>
<h2 class="text-base font-bold">Customize meteograms</h2>
<p class="text-xs text-muted-foreground">
Drag variables between charts to build your own layout.
</p>
</div>
<button
class="flex h-8 w-8 cursor-pointer items-center justify-center rounded-md text-muted-foreground transition-colors hover:bg-muted hover:text-foreground"
onclick={onClose}
aria-label="Close"
>
<svg
class="h-4.5 w-4.5"
fill="none"
stroke="currentColor"
viewBox="0 0 24 24"
stroke-width="2"
>
<path stroke-linecap="round" d="M6 6l12 12M18 6L6 18" />
</svg>
</button>
</div>
<div class="flex-1 space-y-4 overflow-y-auto px-5 py-4">
{#each $storedChartLayout as panel, i (panel.id)}
<div
data-zone={panel.id}
class="rounded-xl border-2 border-dashed p-3 transition-colors {dropZone === panel.id
? 'border-primary bg-primary/5'
: 'border-border'}"
>
<div class="mb-2 flex items-center justify-between">
<span class="text-[11px] font-bold tracking-wider text-primary uppercase"
>Chart {i + 1}</span
>
<button
class="cursor-pointer rounded p-1 text-muted-foreground transition-colors hover:bg-muted hover:text-destructive"
onclick={() => deletePanel(panel.id)}
aria-label="Delete chart {i + 1}"
>
<svg
class="h-4 w-4"
fill="none"
stroke="currentColor"
viewBox="0 0 24 24"
stroke-width="2"
>
<path stroke-linecap="round" d="M6 7h12M9 7V5h6v2m-1 0v12H10V7M4 7h16" />
</svg>
</button>
</div>
<div class="flex min-h-9 flex-wrap gap-2">
{#each panel.variables as key (key)}
{@const def = VARIABLE_BY_KEY.get(key)}
{#if def}
<div
data-chip
role="button"
tabindex="0"
aria-label="Drag {def.label}"
class="flex cursor-grab touch-none items-center gap-1.5 rounded-lg border border-border bg-background py-1.5 pr-1 pl-2.5 text-sm shadow-sm select-none active:cursor-grabbing {dragKey ===
key
? 'opacity-30'
: ''}"
onpointerdown={(e) => beginDrag(e, key)}
onpointermove={onDragMove}
onpointerup={endDrag}
onpointercancel={endDrag}
>
<span
class="h-2.5 w-2.5 shrink-0 rounded-full"
style:background-color={def.color}
></span>
<span class="font-medium">{def.label}</span>
<button
class="ml-0.5 flex h-5 w-5 cursor-pointer items-center justify-center rounded text-muted-foreground hover:bg-muted hover:text-foreground"
onpointerdown={(e) => e.stopPropagation()}
onclick={() => removeVar(key)}
aria-label="Remove {def.label}"
>
<svg
class="h-3.5 w-3.5"
fill="none"
stroke="currentColor"
viewBox="0 0 24 24"
stroke-width="2.5"
>
<path stroke-linecap="round" d="M6 6l12 12M18 6L6 18" />
</svg>
</button>
</div>
{/if}
{/each}
{#if panel.variables.length === 0}
<span class="self-center text-xs text-muted-foreground italic"
>Drop variables here</span
>
{/if}
</div>
</div>
{/each}
<button
class="w-full cursor-pointer rounded-xl border-2 border-dashed border-border py-2.5 text-sm font-semibold text-muted-foreground transition-colors hover:border-primary/50 hover:text-foreground"
onclick={addPanel}
>
+ Add chart
</button>
<div>
<h3 class="mb-2 text-[11px] font-bold tracking-wider text-muted-foreground uppercase">
Available variables
</h3>
<div
data-zone="pool"
class="flex min-h-12 flex-wrap gap-2 rounded-xl border-2 border-dashed p-3 transition-colors {dropZone ===
'pool'
? 'border-primary bg-primary/5'
: 'border-border'}"
>
{#each availableVars as def (def.key)}
<div
data-chip
role="button"
tabindex="0"
aria-label="Drag {def.label}"
class="flex cursor-grab touch-none items-center gap-1.5 rounded-lg border border-border bg-background px-2.5 py-1.5 text-sm text-muted-foreground shadow-sm select-none active:cursor-grabbing {dragKey ===
def.key
? 'opacity-30'
: ''}"
onpointerdown={(e) => beginDrag(e, def.key)}
onpointermove={onDragMove}
onpointerup={endDrag}
onpointercancel={endDrag}
>
<span class="h-2.5 w-2.5 shrink-0 rounded-full" style:background-color={def.color}
></span>
<span class="font-medium">{def.label}</span>
</div>
{/each}
{#if availableVars.length === 0}
<span class="self-center text-xs text-muted-foreground italic"
>All variables are in use</span
>
{/if}
</div>
</div>
</div>
<div class="flex items-center justify-between border-t border-border px-5 py-3">
<button
class="cursor-pointer text-xs font-medium text-muted-foreground underline-offset-2 transition-colors hover:text-foreground hover:underline"
onclick={resetLayout}
>
Reset to defaults
</button>
<button
class="cursor-pointer rounded-lg bg-primary px-4 py-1.5 text-sm font-semibold text-primary-foreground transition-opacity hover:opacity-90"
onclick={onClose}
>
Done
</button>
</div>
</div>
</div>
<!-- Floating drag preview -->
{#if dragKey !== null && started}
<div
class="pointer-events-none fixed z-60 flex items-center gap-1.5 rounded-lg border border-primary bg-card px-2.5 py-1.5 text-sm font-medium shadow-xl"
style:left="{dragPos.x + 8}px"
style:top="{dragPos.y + 8}px"
>
<span class="h-2.5 w-2.5 shrink-0 rounded-full" style:background-color={dragColor}></span>
{dragLabel}
</div>
{/if}
{/if}