How to use Vue and jsmind to implement the copy and paste function of mind map nodes?

How to use Vue and jsmind to implement the copy and paste function of mind map nodes?

Introduction:

Mind map is a commonly used thinking tool, which can help us better organize and express our ideas. In practical applications, we often encounter situations where we need to copy and paste mind map nodes. This article will introduce how to use Vue and jsmind libraries to implement the copy and paste function of mind map nodes, and provide detailed instructions with code examples.

1. Introduction to mind mapping and jsmind

Vue is a progressive JavaScript framework for building user interfaces. It splits complex UI into independent and usable components through componentization. Reusing components makes development more efficient and maintainable.

jsmind is an excellent mind mapping library based on JavaScript. It provides a set of simple and easy-to-use APIs to quickly build and customize mind maps.

2. Ideas for implementing the copy and paste function of mind map nodes

The copy and paste function of mind map nodes can be implemented through the following steps:

1. Select The node that needs to be copied.
2. Save the selected node as clipboard data.
3. Get the clipboard data at the location where you need to paste it, and create a copy node.
4. Insert the copy node into the mind map.

3. Specific implementation steps

Step 1: Introduce the jsmind library into the Vue component.

import jsMind from 'jsmind'
import 'jsmind/style/jsmind.css'

Step 2: Create a mind map container in the Vue component.

<template>
  <div id="jsmind_container"></div>
</template>

Step 3: Initialize the jsmind map in the mounted life cycle of the Vue component.

export default {
  mounted() {
    const mind = {
      // 初始化导图数据
      meta: { name: '思维导图' },
      format: 'node_tree',
      data: [
        {
          id: 'root', // 根节点ID
          isroot: true, // 是否为根节点
          topic: '根节点', // 根节点标题
          expanded: true, // 是否展开
          children: [
            // 子节点
            { id: 'node1', topic: '节点1' },
            { id: 'node2', topic: '节点2' },
            { id: 'node3', topic: '节点3' },
          ],
        },
      ],
    }

    const options = {}
    const jm = new jsMind('jsmind_container')
    jm.show(mind, options)
  },
}

Step 4: Add copy and paste functionality.

export default {
  mounted() {
    // 省略部分代码...

    // 复制节点
    const copyNode = () => {
      const selectedNode = jm.get_selected_node() // 获取选中的节点
      if (selectedNode) {
        const nodeData = { ...selectedNode } // 复制节点数据
        // 将节点数据存储到剪切板
        localStorage.setItem('clipboardNode', JSON.stringify(nodeData))
      }
    }

    // 粘贴节点
    const pasteNode = () => {
      const clipboardNode = JSON.parse(localStorage.getItem('clipboardNode'))
      if (clipboardNode) {
        const parentNode = jm.get_selected_node() // 获取父节点
        if (parentNode) {
          const newNode = { ...clipboardNode } // 复制节点数据
          newNode.id = 'node' + randomId() // 生成新的节点ID
          // 将新节点插入到父节点下面
          jm.add_node(parentNode, newNode.id, newNode.topic)
        }
      }
    }

    // 注册复制和粘贴事件
    document.addEventListener('copy', copyNode)
    document.addEventListener('paste', pasteNode)

    // 生成随机节点ID
    const randomId = () => {
      return Math.random().toString(36).substr(2, 5)
    }
  },
}

Step 5: Clear clipboard data.

Clear clipboard data in the beforeDestroy life cycle of the Vue component.

export default {
  beforeDestroy() {
    localStorage.removeItem('clipboardNode')
  },
}

4. Summary

This article introduces in detail how to use Vue and jsmind to realize the copy and paste function of mind map nodes. Through the above steps, we can easily copy and paste mind map nodes. I hope this article can help readers understand and apply the Vue and jsmind libraries.

(The above code is only an example. In actual application, it needs to be adjusted and expanded according to specific circumstances.)

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