vue可视化拖拽组件_vue3 标尺vue-ruler-tool

空闲时间研究了下可视化拖拽，写了个简单的demo，完成了基本的拖拽，配置功能

涉及到的知识点

1. H5 拖拽
2. 网页标尺辅助线工具(vue-ruler-tool)
3. vue 动态组件

效果图

代码

<template>
  <div class="page-drag">
    <div class="page-left">
      <ul>
         <li
            v-for="widget in widgetTools"
            :key="widget.code"
            draggable="true"
            @dragstart="dragStart(widget.code)"
            @dragend="dragEnd"
          >
            <div class="tools-item">
              <span class="tools-item-text">{{ widget.label }}</span>
            </div>
          </li>
      </ul>
    </div>
    <div class="page-mid">
      <VueRulerTool ref="rulerTool" :content-layout="{left:0,top:0}"
        :is-scale-revise="true"
        :preset-line="presetLine"
      >
        <div id="workbench" @drop="widgetOnDragged($event)" @dragover="dragOver($event)" :style="{width: bigscreenWidth + 'px', height: bigscreenHeight + 'px'}">
          <component draggable="true" @on-dragstart="dragStartItem(item.id)" v-for="(item, index) in widgets" :key="index" :index="index" @on-click="toggleActive(index)" :class="{active: currentIndex == index}" :is="item.type" :value="item.value" />
        </div>
      </VueRulerTool>
    </div>
    <div class="page-right">
      <VDragSet :dragWidgetOpt="dragWidgetOpt"></VDragSet>
    </div>
  </div>
</template>
<script>
import VueRulerTool from 'vue-ruler-tool'
import widgetText from './component/text.vue'
import {widgetTool} from '../assets/widgetInfor/all-widget'
import VDragSet from "./dragSet.vue"
export default {
  components: {VueRulerTool, widgetText, VDragSet},
  data () {
    return {
      presetLine: [{ type: 'l', site: 10 }, { type: 'v', site: 10 }],
      compType: 'widgetText',
      widgetTools: widgetTool,
      widgets: [],
      bigscreenWidth: 1400, // 大屏设计的大小
      bigscreenHeight: 1080,
      dragWidgetCode: "",
      dragWidgetOpt: {},
      currentIndex: 0,
      dragItemId: ""
    }
  },
  methods: {
    dragStartItem (id) {
      this.dragItemId = id;
    },
    toggleActive (i) {
      this.currentIndex = i;
      this.getValuesByInstance();
    },
    dragEnd() {
      this.dragWidgetCode = "";
      this.dragItemId = "";
      this.currentIndex = this.widgets.length - 1;
      this.getValuesByInstance();
    },
    dragStart(widgetCode) {
      this.currentIndex = -1
      this.dragItemId = "";
      this.dragWidgetCode = widgetCode;
      this.dragWidgetOpt = this.widgetTools.find(v => v.code == widgetCode).options;
    },
    dragOver(evt) {
      evt.preventDefault();
      evt.stopPropagation();
      evt.dataTransfer.dropEffect = "copy";
    },
    widgetOnDragged (evt) {
      let eventX = evt.clientX;
      let eventY = evt.clientY;
      let workbenchPosition = this.getDomTopLeftById("workbench");
      let widgetTopInWorkbench = eventY - workbenchPosition.top;
      let widgetLeftInWorkbench = eventX - workbenchPosition.left;
      if (this.dragItemId) {
        let dragItemIndex = this.widgets.findIndex(v => v.id == this.dragItemId);
        let dragItem = this.widgets[dragItemIndex]
        dragItem.value.position.left = widgetLeftInWorkbench
        dragItem.value.position.top = widgetTopInWorkbench
        this.widgets.splice(dragItemIndex, 1, dragItem)
      } else {
        this.widgets.push({
          type: this.dragWidgetCode,
          id: new Date().getTime(),
          value: this.getValuesByMode(this.dragWidgetOpt, widgetTopInWorkbench, widgetLeftInWorkbench),
          options: []
        })
      }
    },
    getValuesByInstance () {
      let currentItem = this.widgets[this.currentIndex].value;
      var opts = JSON.parse(JSON.stringify(this.dragWidgetOpt))
      Object.keys(opts).forEach(k => {
        opts[k].forEach(v => {
          if (currentItem[k] && currentItem[k][v.name]) {
            v.value = currentItem[k][v.name]
          }
        })
      })
      this.dragWidgetOpt = opts;
    },
    getValuesByMode (opt, widgetTopInWorkbench, widgetLeftInWorkbench) { // 左侧模板获取value,设置拖拽的top，left
      let value = {};
      var opts = JSON.parse(JSON.stringify(opt))
      Object.keys(opts).forEach(k => {
        value[k] = {}
        opts[k].forEach(v => {
          if (k == "position") {
            if (widgetTopInWorkbench && v.name == "top") {
              v.value = widgetTopInWorkbench
            }
            if (widgetLeftInWorkbench && v.name == "left") {
              v.value = widgetLeftInWorkbench
            }
          }
          value[k][v.name] = v.value
        })
      })
      return value;
    },
    getDomTopLeftById (id) {
      let dom = document.getElementById(id)
      let top = 0
      let left = 0
      if (dom != null) {
        top = dom.getBoundingClientRect().top
        left = dom.getBoundingClientRect().left
      }
      return { top: top, left: left }
    },
    setLine () {
      let params=[
        { type: "l", site: 200 },
        { type: "v", site: 200 }
      ]
      this.$refs.rulerTool.dragHorizontalLine(params)
    }
  },
  watch: {
    dragWidgetOpt: {
      handler () {
        if (this.widgets[this.currentIndex]) {
          let value = this.getValuesByMode(this.dragWidgetOpt)
          this.widgets[this.currentIndex].value = value
        }
      },
      deep: true
    }
  }
}
</script>
<style lang="less" scoped>
.page-drag {
  width: 100%;
  height: 100%;
  display: flex;
  .page-left {
    flex: 1;
    ul {
      margin: 0;
      padding: 0;
    }
    li {
      height: 100px;
      width: 200px;
      font-size: 50px;
      text-align: center;
      line-height: 100px;
      margin: 10px;
      background-color: #42b983;
      color: #ffffff;
    }
  }
  .page-mid {
    width: 1400px;
    overflow: hidden;
    #workbench {
      position: relative;
      .active {
        border: 1px solid #85CCFE;
      }
    }
  }
  .page-right {
    width: 300px;
    padding-left: 10px;
    border-left: 1px solid #858585;
  }
}
</style>
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text.vue

<template>
<div class="comp-text" @click="$emit('on-click', index)" @dragstart="$emit('on-dragstart', index)" :style="{
  width: value.position.width + 'px',
  height: value.position.height + 'px',
  lineHeight: value.position.height + 'px',
  top: value.position.top + 'px',
  left: value.position.left + 'px',
  fontSize: value.setup.fontSize + 'px',
  letterSpacing: value.setup.letterSpacing,
  background: value.setup.background,
  fontWeight: value.setup.fontWeight,
  textAlign: value.setup.textAlign,
  color: value.setup.color,
}">{{value.setup.text}}</div>
</template>
<script>
export default {
  props: {
    value: Object,
    index: Number
  }
}
</script>
<style lang='less' scoped>
.comp-text {
  position: absolute;
}
</style>
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dragset.vue

<template>
  <div class="right-wrap">
    <el-tabs v-model="activeName" @tab-click="handleClick">
      <el-tab-pane :label="labels[item]" :name="item" v-for="(item, index) in Object.keys(dragWidgetOpt)" :key="index">
        <div class="row" v-for="(v, i) in dragWidgetOpt[activeName]">
          <span class="label">{{v.label}}：</span>
          <span class="value">
            <el-input v-if="v.type == 'el-input-text'" v-model="v.value" :placeholder="v.label"></el-input>
            <el-input-number v-if="v.type == 'el-input-number'" v-model="v.value" :placeholder="v.label"></el-input-number>
            <el-select v-if="v.type == 'el-select'" v-model="v.value" :placeholder="v.label">
              <el-option v-for="item in v.selectOptions" :key="item.value" :label="item.name" :value="item.code"></el-option>
            </el-select>
            <el-color-picker v-if="v.type == 'vue-color'" v-model="v.value"></el-color-picker>
            <el-radio-group v-if="v.type == 'el-radio-group'" v-model="v.value">
              <el-radio :label="item.code" v-for="item in v.selectOptions" :key="item.value">{{item.name}}</el-radio>
            </el-radio-group>
            <el-button v-if="v.type == 'el-button'">{{v.value}}</el-button>
          </span>
        </div>
      </el-tab-pane>
    </el-tabs>
  </div>
</template>
<script>
export default {
  props: {
    dragWidgetOpt: Object
  },
  data () {
    return {
      labels: {
        setup: "配置",
        data: "数据",
        position: "坐标"
      },
      activeName: "setup"
    }
  },
}
</script>
<style lang="less" scoped>
.row {
  height: 40px;
  line-height: 40px;
  display: flex;
  margin-bottom: 10px;
  .label {
    width: 100px;
    text-align: right;
    font-size: 13px;
  }
  .value {
    flex: 1;
    text-align: left;
  }
}
</style>
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widget-text

export const widgetText =  {
  code: 'widget-text',
  type: 'html',
  label: '文本',
  icon: 'iconziyuan',
  options: {
    // 配置
    setup: [
      {
        type: 'el-input-text',
        label: '图层名称',
        name: 'layerName',
        required: false,
        placeholder: '',
        value: '文本框',
      },
      {
        type: 'el-input-text',
        label: '文本内容',
        name: 'text',
        required: false,
        placeholder: '',
        value: '文本框',
      },
      {
        type: 'el-input-number',
        label: '字体大小',
        name: 'fontSize',
        required: false,
        placeholder: '',
        value: '26',
      },
      {
        type: 'vue-color',
        label: '字体颜色',
        name: 'color',
        required: false,
        placeholder: '',
        value: '#FAD400',
      },
      {
        type: 'el-input-number',
        label: '字体间距',
        name: 'letterSpacing',
        required: false,
        placeholder: '',
        value: '0',
      },
      {
        type: 'vue-color',
        label: '字体背景',
        name: 'background',
        required: false,
        placeholder: '',
        value: 'rgba(115,170,229,1)',
      },
      {
        type: 'el-select',
        label: '文字粗细',
        name: 'fontWeight',
        required: false,
        placeholder: '',
        selectOptions: [
          {code: 'normal', name: '正常'},
          {code: 'bold', name: '粗体'},
          {code: 'bolder', name: '特粗体'},
          {code: 'lighter', name: '细体'}
        ],
        value: 'normal'
      },
      {
        type: 'el-select',
        label: '对齐方式',
        name: 'textAlign',
        required: false,
        placeholder: '',
        selectOptions: [
          {code: 'center', name: '居中'},
          {code: 'left', name: '左对齐'},
          {code: 'right', name: '右对齐'},
        ],
        value: 'center'
      },
    ],
    // 数据
    data: [
      {
        type: 'el-radio-group',
        label: '数据类型',
        name: 'dataType',
        require: false,
        placeholder: '',
        selectValue: true,
        selectOptions: [
          {
            code: 'staticData',
            name: '静态数据',
          },
          {
            code: 'dynamicData',
            name: '动态数据',
          },
        ],
        value: 'staticData',
      },
      {
        type: 'el-input-number',
        label: '刷新时间(毫秒)',
        name: 'refreshTime',
        relactiveDom: 'dataType',
        relactiveDomValue: 'dynamicData',
        value: 5000
      },
      {
        type: 'el-button',
        label: '静态数据',
        name: 'staticData',
        required: false,
        placeholder: '',
        relactiveDom: 'dataType',
        relactiveDomValue: 'staticData',
        value: '文本框',
      },
    ],

    // 坐标
    position: [
      {
        type: 'el-input-number',
        label: '左边距',
        name: 'left',
        required: false,
        placeholder: '',
        value: 0,
      },
      {
        type: 'el-input-number',
        label: '上边距',
        name: 'top',
        required: false,
        placeholder: '',
        value: 0,
      },
      {
        type: 'el-input-number',
        label: '宽度',
        name: 'width',
        required: false,
        placeholder: '该容器在1920px大屏中的宽度',
        value: 100,
      },
      {
        type: 'el-input-number',
        label: '高度',
        name: 'height',
        required: false,
        placeholder: '该容器在1080px大屏中的高度',
        value: 40
      },
    ],
  }
}
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all-widget

import {widgetText} from "./widget-text"
export const widgetTool = [widgetText]
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