Vue.Draggable学习总结

npm install vuedraggable

import draggable from ‘vuedraggable‘

<template>
  <div class="fluid container">
    <div class="form-group form-group-lg panel panel-default">
      <div class="panel-heading">
        <h3 class="panel-title">Sortable control</h3>
      </div>
      <div class="panel-body">
        <div class="checkbox">
          <label><input type="checkbox" v-model="editable">Enable drag and drop</label>
        </div>
        <button type="button" class="btn btn-default" @click="orderList">Sort by original order</button>
      </div>
    </div>

    <div class="col-md-3">
      <draggable class="list-group" element="ul" v-model="list" :options="dragOptions" :move="onMove" @start="isDragging=true" @end="isDragging=false">
        <transition-group type="transition" :name="‘flip-list‘">
          <li class="list-group-item" v-for="element in list" :key="element.order">
            <i :class="element.fixed? ‘fa fa-anchor‘ : ‘glyphicon glyphicon-pushpin‘" @click=" element.fixed=! element.fixed" aria-hidden="true"></i>
            {{element.name}}
            <span class="badge">{{element.order}}</span>
          </li>
        </transition-group>
      </draggable>
    </div>

    <div class="col-md-3">
      <draggable element="span" v-model="list2" :options="dragOptions" :move="onMove">
        <transition-group name="no" class="list-group" tag="ul">
          <li class="list-group-item" v-for="element in list2" :key="element.order">
            <i :class="element.fixed? ‘fa fa-anchor‘ : ‘glyphicon glyphicon-pushpin‘" @click=" element.fixed=! element.fixed" aria-hidden="true"></i>
            {{element.name}}
            <span class="badge">{{element.order}}</span>
          </li>
        </transition-group>
      </draggable>
    </div>

    <div class="list-group col-md-3">
      <pre>{{listString}}</pre>
    </div>
    <div class="list-group col-md-3">
      <pre>{{list2String}}</pre>
    </div>
  </div>
</template>

<script>
import draggable from "vuedraggable";
const message = [
  "vue.draggable",
  "draggable",
  "component",
  "for",
  "vue.js 2.0",
  "based",
  "on",
  "Sortablejs"
];

export default {
  name: "hello",
  components: {
    draggable
  },
  data() {
    return {
      list: message.map((name, index) => {
        return { name, order: index + 1, fixed: false };
      }),
      list2: [],
      editable: true,
      isDragging: false,
      delayedDragging: false
    };
  },
  methods: {
    orderList() {
      this.list = this.list.sort((one, two) => {
        return one.order - two.order;
      });
    },
    onMove({ relatedContext, draggedContext }) {
      const relatedElement = relatedContext.element;
      const draggedElement = draggedContext.element;
      return (
        (!relatedElement || !relatedElement.fixed) && !draggedElement.fixed
      );
    }
  },
  computed: {
    dragOptions() {
      return {
        animation: 0,
        group: "description",
        disabled: !this.editable,
        ghostClass: "ghost"
      };
    },
    listString() {
      return JSON.stringify(this.list, null, 2);
    },
    list2String() {
      return JSON.stringify(this.list2, null, 2);
    }
  },
  watch: {
    isDragging(newValue) {
      if (newValue) {
        this.delayedDragging = true;
        return;
      }
      this.$nextTick(() => {
        this.delayedDragging = false;
      });
    }
  }
};
</script>

<style>
.flip-list-move {
  transition: transform 0.5s;
}

.no-move {
  transition: transform 0s;
}

.ghost {
  opacity: 0.5;
  background: #c8ebfb;
}

.list-group {
  min-height: 20px;
}

.list-group-item {
  cursor: move;
}

.list-group-item i {
  cursor: pointer;
}
</style>

import Vue from "vue";
import App from "./App.vue";
import "bootstrap/dist/css/bootstrap.css";
import "font-awesome/less/font-awesome.less";

Vue.config.productionTip = false;

new Vue({
  render: h => h(App)
}).$mount("#app");

<draggable v-model="myArray">

<draggable element="ul" v-model="list" :move=‘allow‘>
...
methods: {
  allow(evt) {
    console.log(evt.draggedContext.index)
    console.log(evt.draggedContext.element)
    console.log(evt.draggedContext.futureIndex)
    console.log(evt.relatedContext.index)
    console.log(evt.relatedContext.element)
    console.log(evt.relatedContext.list)
    console.log(evt.relatedContext.component)
    return (evt.draggedContext.element.name!== ‘b‘)
  }
}

<draggable element="el-collapse" :list="list" :component-data="getComponentData()">
  <el-collapse-item v-for="e in list" :title="e.title" :name="e.name" :key="e.name">
    <div>{{e.description}}</div>
   </el-collapse-item>
</draggable>

methods: {
  handleChange() {
    console.log(‘changed‘);
  },
  inputChanged(value) {
    this.activeNames = value;
  },
  getComponentData() {
    return {
      on: {
        change: this.handleChange,
        input: this.inputChanged
      },
      props: {
        value: this.activeNames
      }
    };
  }
}

<draggable v-model="myArray" :options="{draggable:‘.item‘}">
    <div v-for="element in myArray" :key="element.id" class="item">
        {{element.name}}
    </div>
    <button slot="footer" @click="addPeople">Add</button>
</draggable>