How to implement branching and splitting operations of mind maps using Vue and jsmind?

How to implement branching and splitting operations of mind maps using Vue and jsmind?

Mind map is a commonly used tool for thinking and organizing thinking. It can help us clearly display and understand the relationship between problems, ideas and thinking. In front-end development, we can use Vue and jsmind libraries to implement mind map branching and splitting operations.

First, we need to introduce the jsmind library into the Vue project. You can install jsmind through npm, or directly download the jsmind.js file and introduce it into the project.

In the Vue component, we define a "MindMap" component to display and operate mind maps. In the template part, we create a div element as a container for the mind map and set a unique id to it:

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

In the Vue component, we can initialize and render the mind in the mounted life cycle hook function map. In the mounted function, we need to first get the DOM element of the mind map container, then create a jsmind instance and render it into the container:

<script>
import jsMind from 'jsmind'

export default {
  mounted() {
    const container = document.getElementById('mindMap')

    // 创建jsmind实例
    const options = {
      container,
      editable: true // 设置思维导图可编辑
    }
    const mindMap = jsMind.show(options)

    // 渲染思维导图
    const mindData = {
      'format': 'node_tree',
      'data': [
        {'id': 'root', 'isroot': true, 'topic': '思维导图'}
      ]
    }
    mindMap.show(mindData)
  }
}
</script>

In the above code, we create a jsmind instance , and render it into the container with the id "mindMap". We also set an initial node for the mind map, whose topic is "Mind Map".

Next, we can implement branching and splitting operations by adding buttons and input boxes. In the template, we add a button and an input box:

<template>
  <div>
    <div id="mindMap"></div>
    <div>
      <input type="text" v-model="newNodeText" placeholder="输入新节点的内容">
      <button @click="addNode">添加节点</button>
    </div>
  </div>
</template>

In the Vue component, we define an addNode method to handle the logic of adding nodes. In the addNode method, we first get the new node text in the input box, and then add it as a child node to the currently selected node:

<script>
import jsMind from 'jsmind'

export default {
  data() {
    return {
      newNodeText: ''
    }
  },
  mounted() {
    // 省略部分代码...

    const mindMap = jsMind.show(options)

    // 省略部分代码...
  },
  methods: {
    addNode() {
      const mindMap = jsMind.get_current_jm()
      const selectedNode = mindMap.get_selected_node()
      const newNodeText = this.newNodeText

      if (selectedNode) {
        const newNodeId = selectedNode.id + '1'
        const newNode = {
          'id': newNodeId,
          'topic': newNodeText
        }
        mindMap.add_node(selectedNode, newNode, 'right')
      }
    }
  }
}
</script>

In the above code, we call jsMind.get_current_jm( ) method to get the current jsmind instance, and then use the mindMap.get_selected_node() method to get the currently selected node. Next, we use the text in the input box as the content of the new node, create a new node object, and add it to the right of the currently selected node.

So far, we have implemented the branching and splitting operations of the mind map using Vue and jsmind in the Vue project. When we enter text in the input box and click the "Add Node" button, the new node will be added to the right of the currently selected node.

The above are examples of how to use Vue and jsmind to implement branching and splitting operations on mind maps. Hope this helps!

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