<script setup>
import { ref } from "vue";
import { VueFlow } from "@vue-flow/core";
const nodes = ref([
  // an input node, specified by using `type: 'input'`
  {
    id: "1",
    type: "input",
    position: { x: 250, y: 5 },
    // all nodes can have a data object containing any data you want to pass to the node
    // a label can property can be used for default nodes
    data: { label: "Node 1" },
  },
  // default node, you can omit `type: 'default'` as it's the fallback type
  {
    id: "2",
    position: { x: 100, y: 100 },
    data: { label: "Node 2" },
  },
  // An output node, specified by using `type: 'output'`
  {
    id: "3",
    type: "output",
    position: { x: 400, y: 200 },
    data: { label: "Node 3" },
  },
  // this is a custom node
  // we set it by using a custom type name we choose, in this example `special`
  // the name can be freely chosen, there are no restrictions as long as it's a string
  {
    id: "4",
    type: "special", // <-- this is the custom node type name
    position: { x: 800, y: 200 },
    data: {
      label: "Node 4",
      hello: "world",
    },
  },
]);
const edges = ref([
  // default bezier edge
  // consists of an edge id, source node id and target node id
  {
    id: "e1->2",
    source: "1",
    target: "2",
  },
  // set `animated: true` to create an animated edge path
  {
    id: "e2->3",
    source: "2",
    target: "3",
    animated: true,
  },
  // a custom edge, specified by using a custom type name
  // we choose `type: 'special'` for this example
  {
    id: "e3->4",
    type: "special",
    source: "3",
    target: "4",
    // all edges can have a data object containing any data you want to pass to the edge
    data: {
      hello: "world",
    },
  },
]);
</script>
<template>
  <VueFlow :nodes="nodes" :edges="edges" style="height: 100vh; width: 100vw">
  </VueFlow>
</template>
<style>
/* import the necessary styles for Vue Flow to work */
@import "@vue-flow/core/dist/style.css";
/* import the default theme, this is optional but generally recommended */
@import "@vue-flow/core/dist/theme-default.css";
</style>

// 在script中引入
import sunNode from "./sunNode.vue";
<template>
  <div class="layout-flow">
    <VueFlow
      :nodes="nodes"
      :edges="edges"
      @nodes-initialized="layoutGraph('TB')"
    >
      <template #node-sun="props">
        <div class="sunNode">
          <span>{{ props.data.label }}</span>
        </div>
      </template>
    </VueFlow>
  </div>
</template>

<script setup>
import { ref } from 'vue'
import { VueFlow } from '@vue-flow/core'
const nodes = ref([
  {
    id: '1',
    data: { label: 'Node 1' },
    position: { x: 50, y: 50 },
  },
])
  
function logEvent(name, data) {
  console.log(name, data)
}
</script>
<template>
  <!-- bind listeners to the event handlers -->
  <VueFlow
    :nodes="nodes"
    @node-drag-start="logEvent('drag start', $event)"
    @node-drag="logEvent('drag', $event)"
    @node-drag-stop="logEvent('drag stop', $event)"
    @node-click="logEvent('click', $event)"
    @node-double-click="logEvent('dblclick', $event)"
    @node-contextmenu="logEvent('contextmenu', $event)"
    @node-mouse-enter="logEvent('mouseenter', $event)"
    @node-mouse-leave="logEvent('mouseleave', $event)"
    @node-mouse-move="logEvent('mousemove', $event)"
  />
</template>

<script setup>
import { ref } from 'vue'  
import { VueFlow, useVueFlow } from '@vue-flow/core'
// useVueFlow provides access to the event handlers
const { 
  onNodeDragStart, 
  onNodeDrag,
  onNodeDragStop, 
  onNodeClick, 
  onNodeDoubleClick, 
  onNodeContextMenu, 
  onNodeMouseEnter, 
  onNodeMouseLeave, 
  onNodeMouseMove 
} = useVueFlow()
  
const nodes = ref([
  {
    id: '1',
    data: { label: 'Node 1' },
    position: { x: 50, y: 50 },
  },
])
  
// bind listeners to the event handlers
onNodeDragStart((event) => {
  console.log('Node drag started', event)
})
onNodeDrag((event) => {
  console.log('Node dragged', event)
})
onNodeDragStop((event) => {
  console.log('Node drag stopped', event)
})
  
// ... and so on  
</script>
<template>
  <VueFlow :nodes="nodes" />
</template>

<script setup>
import { ref } from 'vue'
import { VueFlow } from '@vue-flow/core'
const nodes = ref([
  {
    id: '1',
    position: { x: 50, y: 50 },
    data: { label: 'Node 1', },
  },
  {
    id: '2',
    position: { x: 50, y: 250 },
    data: { label: 'Node 2', },
  },
])
const edges = ref([
  {
    id: 'e1->2',
    source: '1',
    target: '2',
  },
])
  
function logEvent(eventName, data) {
  console.log(eventName, data)
}
</script>
<template>
  <VueFlow
    :nodes="nodes"
    :edges="edges"
    @edge-click="logEvent('edge clicked', $event)"
    @edge-double-click="logEvent('edge double clicked', $event)"
    @edge-context-menu="logEvent('edge context menu', $event)"
    @edge-mouse-enter="logEvent('edge mouse enter', $event)"
    @edge-mouse-leave="logEvent('edge mouse leave', $event)"
    @edge-mouse-move="logEvent('edge mouse move', $event)"
    @edge-update-start="logEvent('edge update start', $event)"
    @edge-update="logEvent('edge update', $event)"
    @edge-update-end="logEvent('edge update end', $event)"
  />
</template>

<script setup>
import { Handle } from '@vue-flow/core'
  
defineProps(['id', 'sourcePosition', 'targetPosition', 'data'])
</script>
<template>
  <Handle type="source" :position="sourcePosition" />
  
  <span>{{ data.label }}</span>
  
  <Handle type="target" :position="targetPosition" />
</template>

<style>
@import "@vue-flow/core/dist/style.css";
@import "@vue-flow/core/dist/theme-default.css";
// ...其他的css样式
</style>