update(examples): Add validation and zoom pan helper example

2021-10-22 13:03:14 +02:00
parent babcbd0e1f
commit 8779a58bab
7 changed files with 171 additions and 1 deletions
@@ -0,0 +1,50 @@
+<script lang="ts" setup>
+import Flow, {
+  removeElements,
+  addEdge,
+  Background,
+  MiniMap,
+  useZoomPanHelper,
+  Elements,
+  ElementId,
+  Connection,
+  Edge,
+  Node,
+} from '~/index'
+
+const initialElements: Elements = [
+  { id: '1', type: 'input', data: { label: 'Node 1' }, position: { x: 250, y: 5 }, className: 'light' },
+  { id: '2', data: { label: 'Node 2' }, position: { x: 100, y: 100 }, className: 'light' },
+  { id: '3', data: { label: 'Node 3' }, position: { x: 400, y: 100 }, className: 'light' },
+  { id: '4', data: { label: 'Node 4' }, position: { x: 400, y: 200 }, className: 'light' },
+  { id: 'e1-2', source: '1', target: '2', animated: true },
+  { id: 'e1-3', source: '1', target: '3' },
+] as Elements
+
+let id = 5
+const getId = (): ElementId => `${id++}`
+
+const { project } = useZoomPanHelper()
+
+const elements = ref(initialElements)
+
+const onPaneClick = (evt: MouseEvent) => {
+  const projectedPosition = project({ x: evt.clientX, y: evt.clientY - 40 })
+
+  elements.value = elements.value.concat({
+    id: getId(),
+    position: projectedPosition,
+    data: {
+      label: `${projectedPosition.x}-${projectedPosition.y}`,
+    },
+  } as Node)
+}
+const onConnect = (params: Connection | Edge) => (elements.value = addEdge(params, elements.value))
+const onElementsRemove = (elementsToRemove: Elements) => (elements.value = removeElements(elementsToRemove, elements.value))
+</script>
+<template>
+  <Flow :elements="elements" @elements-remove="onElementsRemove" @connect="onConnect" @pane-click="onPaneClick">
+    <Background />
+    <MiniMap />
+  </Flow>
+</template>