docs: add run process to layouting example

docs/examples/layout/App.vue

@@ -3,40 +3,48 @@ import dagre from 'dagre'
 import { nextTick, ref } from 'vue'
 import { Panel, Position, VueFlow, useVueFlow } from '@vue-flow/core'
 import { Background } from '@vue-flow/background'
+import ProcessNode from './ProcessNode.vue'
 
 import { initialEdges, initialNodes } from './initial-elements.js'
+import { useRunProcess } from './useRunProcess'
 
 const nodes = ref(initialNodes)
 
 const edges = ref(initialEdges)
 
+const dagreGraph = ref(new dagre.graphlib.Graph())
+
+dagreGraph.value.setDefaultEdgeLabel(() => ({}))
+
+const { run } = useRunProcess()
+
 const { findNode, fitView } = useVueFlow()
 
 function handleLayout(direction) {
   // we create a new graph instance, in case some nodes/edges were removed, otherwise dagre would act as if they were still there
-  const dagreGraph = new dagre.graphlib.Graph()
+  dagreGraph.value = new dagre.graphlib.Graph()
 
-  dagreGraph.setDefaultEdgeLabel(() => ({}))
+  dagreGraph.value.setDefaultEdgeLabel(() => ({}))
 
   const isHorizontal = direction === 'LR'
-  dagreGraph.setGraph({ rankdir: direction })
+  dagreGraph.value.setGraph({ rankdir: direction })
 
   for (const node of nodes.value) {
     // if you need width+height of nodes for your layout, you can use the dimensions property of the internal node (`GraphNode` type)
     const graphNode = findNode(node.id)
 
-    dagreGraph.setNode(node.id, { width: graphNode.dimensions.width || 150, height: graphNode.dimensions.height || 50 })
+    dagreGraph.value.setNode(node.id, { width: graphNode.dimensions.width || 150, height: graphNode.dimensions.height || 50 })
   }
 
   for (const edge of edges.value) {
-    dagreGraph.setEdge(edge.source, edge.target)
+    dagreGraph.value.setEdge(edge.source, edge.target)
   }
 
-  dagre.layout(dagreGraph)
+  dagre.layout(dagreGraph.value)
 
   // set nodes with updated positions
   nodes.value = nodes.value.map((node) => {
-    const nodeWithPosition = dagreGraph.node(node.id)
+    const nodeWithPosition = dagreGraph.value.node(node.id)
 
     return {
       ...node,
@@ -55,11 +63,17 @@ function handleLayout(direction) {
 <template>
   <div class="layoutflow">
     <VueFlow :nodes="nodes" :edges="edges" @nodes-initialized="handleLayout('TB')">
+      <template #node-process="props">
+        <ProcessNode v-bind="props" />
+      </template>
+
       <Background />
 
       <Panel style="display: flex; gap: 1rem" position="top-right">
-        <button @click="handleLayout('TB')">vertical layout</button>
-        <button @click="handleLayout('LR')">horizontal layout</button>
+        <button @click="handleLayout('TB')">vertical</button>
+        <button @click="handleLayout('LR')">horizontal</button>
+
+        <button @click="run(nodes, dagreGraph)">Run</button>
       </Panel>
     </VueFlow>
   </div>