El provider

<script setup lang="ts">
import { DnDProvider } from '@vue-dnd-kit/core';
import Tasks from './Tasks.vue';
import StatePanel from './StatePanel.vue';
</script>

<template>
  <!-- One provider: the list drags, the panel reads the drag. Neither imports the other. -->
  <DnDProvider>
    <div class="demo">
      <Tasks />
      <StatePanel />
    </div>
  </DnDProvider>
</template>

<style scoped>
.demo {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: center;
  gap: 24px;
}
</style>

<script setup lang="ts">
import { computed, ref, shallowRef } from 'vue';
import {
  DnDProvider,
  closestCenter,
  closestCorners,
  pointerFirst,
  pointerWithin,
  rectIntersection,
  type CollisionDetection,
  type DnDEndEvent,
  type Key,
} from '@vue-dnd-kit/core';
import Desk from './Desk.vue';
import { magnet } from './magnet';

const DETECTORS: Record<string, CollisionDetection> = {
  pointerFirst,
  pointerWithin,
  rectIntersection,
  closestCenter,
  closestCorners,
  magnet,
};
const names = Object.keys(DETECTORS);
const mode = ref('pointerFirst');

// The ranking of the current frame, best first: a wrapper around the chosen function
// records it, so the targets can show their rank.
const ranked = shallowRef<Key[]>([]);
const collision = computed<CollisionDetection>(() => {
  const detect = DETECTORS[mode.value]!;
  return (args) => (ranked.value = detect(args));
});

const result = ref('Drag the pin or the card over the targets');
const onEnd = ({ over }: DnDEndEvent) => {
  ranked.value = [];
  result.value = over ? `Dropped on ${over.id}` : 'Dropped on nothing';
};
const onCancel = () => {
  ranked.value = [];
  result.value = 'Cancelled';
};
</script>

<template>
  <DnDProvider :collision="collision" @drag-end="onEnd" @drag-cancel="onCancel">
    <div class="lab">
      <div class="modes" role="radiogroup" aria-label="Collision detection">
        <label v-for="name in names" :key="name" :class="{ on: mode === name }">
          <input v-model="mode" type="radio" :value="name" />
          {{ name }}
        </label>
      </div>
      <code class="call">&lt;DnDProvider :collision="{{ mode }}"&gt;</code>
      <Desk :ranked="ranked" />
      <p class="result" aria-live="polite">{{ result }}</p>
    </div>
  </DnDProvider>
</template>

<style scoped>
.lab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.modes {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2px;
  max-width: 100%;
  padding: 3px;
  border-radius: 9px;
  background: color-mix(in srgb, currentColor 7%, transparent);
}

.modes label {
  padding: 5px 9px;
  border-radius: 6px;
  font: 12px/1.2 ui-monospace, Menlo, Consolas, monospace;
  cursor: pointer;
}

.modes label.on {
  background: Canvas;
  box-shadow: 0 1px 3px rgb(0 0 0 / 0.25);
  font-weight: 600;
}

.modes label:has(input:focus-visible) {
  outline: 2px solid #42b883;
}

.modes input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.call {
  max-width: 100%;
  padding: 6px 10px;
  overflow-x: auto;
  border-radius: 8px;
  background: color-mix(in srgb, currentColor 6%, transparent);
  font: 11px/1.4 ui-monospace, Menlo, Consolas, monospace;
  white-space: nowrap;
  color: #42b883;
}

.result {
  margin: 0;
  font: 11px/1.4 ui-monospace, Menlo, Consolas, monospace;
  opacity: 0.6;
}
</style>

<script setup lang="ts">
import { computed, ref } from 'vue';
import { DnDProvider } from '@vue-dnd-kit/core';
import Channels from './Channels.vue';

const OPTIONS = {
  threshold: [0.1, 0.2, 0.4],
  maxSpeed: [10, 25, 50],
  acceleration: [4, 10, 25],
} as const;

const on = ref(true);
// The defaults: an edge zone of 20% of the container (24 to 96px), 10px a frame at the
// edge, up to 25px a frame past it.
const options = ref({ threshold: 0.2, maxSpeed: 25, acceleration: 10 });
const autoScroll = computed(() => (on.value ? options.value : false));
const call = computed(() =>
  on.value
    ? `:auto-scroll="{ threshold: ${options.value.threshold}, maxSpeed: ${options.value.maxSpeed}, acceleration: ${options.value.acceleration} }"`
    : ':auto-scroll="false"',
);
</script>

<template>
  <DnDProvider :auto-scroll="autoScroll">
    <div class="demo">
      <div class="switches">
        <label class="switch">
          <input v-model="on" type="checkbox" />
          autoScroll
        </label>
        <fieldset v-for="(values, name) in OPTIONS" :key="name" :disabled="!on">
          <legend>{{ name }}</legend>
          <label v-for="value in values" :key="value" :class="{ on: options[name] === value }">
            <input v-model="options[name]" type="radio" :value="value" />
            {{ value }}
          </label>
        </fieldset>
      </div>
      <code class="call">{{ call }}</code>
      <Channels :threshold="on ? options.threshold : 0" />
    </div>
  </DnDProvider>
</template>

<style scoped>
.demo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.switches {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 14px;
}

fieldset {
  display: inline-flex;
  margin: 0;
  padding: 3px;
  border: 0;
  border-radius: 9px;
  background: color-mix(in srgb, currentColor 7%, transparent);
}

fieldset:disabled {
  opacity: 0.4;
}

legend {
  float: left;
  align-self: center;
  padding: 0 8px 0 6px;
  font: 10px/1 ui-monospace, Menlo, Consolas, monospace;
  opacity: 0.55;
}

fieldset label {
  padding: 5px 9px;
  border-radius: 6px;
  font: 12px/1.2 ui-monospace, Menlo, Consolas, monospace;
  cursor: pointer;
}

fieldset label.on {
  background: Canvas;
  box-shadow: 0 1px 3px rgb(0 0 0 / 0.25);
  font-weight: 600;
}

fieldset label:has(input:focus-visible),
.switch:has(input:focus-visible) {
  outline: 2px solid #42b883;
}

fieldset input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 9px;
  background: color-mix(in srgb, currentColor 7%, transparent);
  font: 12px/1.2 ui-monospace, Menlo, Consolas, monospace;
  cursor: pointer;
}

.switch input {
  accent-color: #42b883;
}

.call {
  max-width: 100%;
  padding: 6px 10px;
  overflow-x: auto;
  border-radius: 8px;
  background: color-mix(in srgb, currentColor 6%, transparent);
  font: 11px/1.4 ui-monospace, Menlo, Consolas, monospace;
  white-space: nowrap;
  color: #42b883;
}
</style>

<script setup lang="ts">
import { ref } from 'vue';
import { DnDProvider } from '@vue-dnd-kit/core';
import Shelf from './Shelf.vue';
import EventLog from './EventLog.vue';

const reading = ref([
  { id: 'dune', title: 'Dune', hue: 32 },
  { id: 'emma', title: 'Emma', hue: 330 },
  { id: 'ulysses', title: 'Ulysses', hue: 210 },
]);
const wishlist = ref([
  { id: 'beloved', title: 'Beloved', hue: 140 },
  { id: 'solaris', title: 'Solaris', hue: 260 },
]);

const separate = ref(false);
</script>

<template>
  <DnDProvider>
    <div class="demo">
      <div class="modes" role="radiogroup" aria-label="Wishlist">
        <label :class="{ on: !separate }"><input v-model="separate" type="radio" :value="false" />one provider</label>
        <label :class="{ on: separate }"><input v-model="separate" type="radio" :value="true" />wishlist in its own</label>
      </div>
      <div class="columns">
        <div class="column">
          <Shelf id="reading" v-model="reading" title="Reading" />
          <EventLog title="outer monitor" />
        </div>
        <!-- A provider inside a provider: its items belong to it, and drags never cross. -->
        <DnDProvider v-if="separate">
          <div class="column island">
            <span class="tag">&lt;DnDProvider&gt;</span>
            <Shelf id="wishlist" v-model="wishlist" title="Wishlist" />
            <EventLog title="inner monitor" />
          </div>
        </DnDProvider>
        <div v-else class="column">
          <Shelf id="wishlist" v-model="wishlist" title="Wishlist" />
        </div>
      </div>
    </div>
  </DnDProvider>
</template>

<style scoped>
.demo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.modes {
  display: inline-flex;
  padding: 3px;
  border-radius: 9px;
  background: color-mix(in srgb, currentColor 7%, transparent);
}

.modes label {
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
}

.modes label.on {
  background: Canvas;
  box-shadow: 0 1px 3px rgb(0 0 0 / 0.25);
  font-weight: 600;
}

.modes label:has(input:focus-visible) {
  outline: 2px solid #42b883;
}

.modes input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 230px));
  gap: 16px;
  max-width: 100%;
}

.column {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.island {
  position: relative;
  margin: -10px;
  padding: 10px;
  border: 1.5px dashed color-mix(in srgb, #42b883 60%, transparent);
  border-radius: 16px;
}

.tag {
  position: absolute;
  top: -9px;
  right: 14px;
  padding: 0 6px;
  background: Canvas;
  font: 10px/18px ui-monospace, Menlo, Consolas, monospace;
  color: #42b883;
}
</style>