75 lines
1.5 KiB
Vue
75 lines
1.5 KiB
Vue
<script setup>
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import { VueFlow, useVueFlow } from '@vue-flow/core'
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import { nextTick, watch } from 'vue'
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import Sidebar from './Sidebar.vue'
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let id = 0
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function getId() {
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return `dndnode_${id++}`
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}
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const { findNode, onConnect, addEdges, addNodes, project, vueFlowRef } = useVueFlow({
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nodes: [
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{
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id: '1',
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type: 'input',
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label: 'input node',
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position: { x: 250, y: 25 },
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},
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],
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})
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function onDragOver(event) {
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event.preventDefault()
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if (event.dataTransfer) {
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event.dataTransfer.dropEffect = 'move'
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}
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}
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onConnect((params) => addEdges(params))
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function onDrop(event) {
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const type = event.dataTransfer?.getData('application/vueflow')
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const { left, top } = vueFlowRef.value.getBoundingClientRect()
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const position = project({
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x: event.clientX - left,
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y: event.clientY - top,
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})
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const newNode = {
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id: getId(),
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type,
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position,
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label: `${type} node`,
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}
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addNodes([newNode])
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// align node position after drop, so it's centered to the mouse
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nextTick(() => {
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const node = findNode(newNode.id)
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const stop = watch(
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() => node.dimensions,
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(dimensions) => {
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if (dimensions.width > 0 && dimensions.height > 0) {
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node.position = { x: node.position.x - node.dimensions.width / 2, y: node.position.y - node.dimensions.height / 2 }
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stop()
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}
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},
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{ deep: true, flush: 'post' },
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)
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})
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}
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</script>
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<template>
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<div class="dndflow" @drop="onDrop">
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<VueFlow @dragover="onDragOver" />
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<Sidebar />
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</div>
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</template>
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