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feat(VectorLayer): Make filter reactive #332

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Merged
awesomephant merged 2 commits into from
Mar 3, 2026
Merged

feat(VectorLayer): Make filter reactive #332

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9a97ef3
Build out feature
awesomephant Mar 3, 2026
fe7619f
Tweak story
awesomephant Mar 3, 2026
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25 changes: 23 additions & 2 deletions components/src/maplibre/VectorLayer/VectorLayer.stories.svelte
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Original file line number Diff line number Diff line change
Expand Up @@ -10,12 +10,21 @@
import type { GeoJSON } from 'geojson';

import { SWRDataLabLight } from '../MapStyle';
import type { FilterSpecification } from 'maplibre-gl';
import { tokens } from '../../DesignTokens';

const { Story } = defineMeta({
title: 'Maplibre/Layer/VectorLayer',
component: VectorLayer
});

const filters: FilterSpecification[] = [
['<', 'coverage_2025', 1],
['>', 'coverage_2025', 1]
];

let selectedFilter: any = $state(0);

let hovered: any = $state();
const handleMouseMove = (e) => {
hovered = e.features?.[0];
Expand Down Expand Up @@ -104,6 +113,14 @@

<Story asChild name="Filter">
<DesignTokens theme="light">
<div class="controls">
<label for="filter-select">Select filter</label>
<select name="filter-select" id="filter-select" bind:value={selectedFilter}>
{#each filters as f, i}
<option value={i}>{JSON.stringify(f)}</option>
{/each}
</select>
</div>
<div class="container">
<Map showDebug={true} style={SWRDataLabLight()}>
<VectorTileSource
Expand All @@ -115,9 +132,9 @@
sourceLayer="coverage"
type="fill"
id="coverage-fill"
filter={['<', 'coverage_2025', 1]}
filter={filters[selectedFilter]}
paint={{
'fill-color': '#ce541c'
'fill-color': tokens.shades.forest.base
}}
/>
<AttributionControl position="bottom-left" />
Expand All @@ -131,4 +148,8 @@
width: 100%;
height: 600px;
}
.controls {
margin-bottom: 1em;
font-family: monospace;
}
</style>
12 changes: 10 additions & 2 deletions components/src/maplibre/VectorLayer/VectorLayer.svelte
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Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,8 @@
type SymbolLayoutProps,
type LinePaintProps,
type MapGeoJSONFeature,
type MapLayerMouseEvent
type MapLayerMouseEvent,
type FilterSpecification
} from 'maplibre-gl';

import { getMapContext } from '../context.svelte.js';
Expand All @@ -24,7 +25,7 @@
/**
* Maplibre [filter expression](https://maplibre.org/maplibre-style-spec/layers/#filter)
*/
filter?: any[];
filter?: FilterSpecification;
type: 'line' | 'fill' | 'circle' | 'symbol';
placeBelow?: string;
visible?: boolean;
Expand Down Expand Up @@ -91,6 +92,13 @@
}
});

// Make filter reactive
$effect(() => {
if (styleLoaded && filter) {
map?.setFilter(id, filter);
}
});

$effect(() => resetLayerEventListener(map, 'click', id, onclick));
$effect(() => resetLayerEventListener(map, 'mousemove', id, onmousemove));
$effect(() => resetLayerEventListener(map, 'mouseleave', id, onmouseleave));
Expand Down