63 lines
1.8 KiB
Vue
63 lines
1.8 KiB
Vue
<script lang="ts" setup>
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import dagre from 'dagre'
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import initialElements from './initial-elements'
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import './layouting.css'
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import Flow, { Controls, addEdge, Connection, Edge, Elements, isNode, NodeExtent, Position, removeElements } from '~/index'
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const dagreGraph = new dagre.graphlib.Graph()
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dagreGraph.setDefaultEdgeLabel(() => ({}))
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const nodeExtent: NodeExtent = [
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[0, 0],
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[1000, 1000],
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]
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const elements = ref<Elements>(initialElements)
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const onConnect = (params: Connection | Edge) => (elements.value = addEdge(params, elements.value))
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const onElementsRemove = (elementsToRemove: Elements) => (elements.value = removeElements(elementsToRemove, elements.value))
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const onLayout = (direction: string) => {
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const isHorizontal = direction === 'LR'
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dagreGraph.setGraph({ rankdir: direction })
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elements.value.forEach((el) => {
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if (isNode(el)) {
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dagreGraph.setNode(el.id, { width: 150, height: 50 })
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} else {
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dagreGraph.setEdge(el.source, el.target)
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}
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})
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dagre.layout(dagreGraph)
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elements.value = elements.value.map((el) => {
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if (isNode(el)) {
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const nodeWithPosition = dagreGraph.node(el.id)
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el.targetPosition = isHorizontal ? Position.Left : Position.Top
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el.sourcePosition = isHorizontal ? Position.Right : Position.Bottom
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el.position = { x: nodeWithPosition.x, y: nodeWithPosition.y }
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}
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return el
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})
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}
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</script>
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<template>
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<div class="layoutflow">
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<Flow
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:elements="elements"
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:node-extent="nodeExtent"
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@connect="onConnect"
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@clements-remove="onElementsRemove"
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@load="() => onLayout('TB')"
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>
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<Controls />
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</Flow>
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<div class="controls">
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<button :style="{ marginRight: 10 }" @click="() => onLayout('TB')">vertical layout</button>
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<button @click="() => onLayout('LR')">horizontal layout</button>
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</div>
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</div>
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</template>
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