vue自定义组件——split-pane

github地址: https://github.com/lxmghct/my-vue-components

组件介绍

• props:
  • splitCount: 分割数量, default: 2
  • direction: 分割方向, 'vertical' or 'horizontal', default: 'horizontal'
  • defaultRatio: 默认比例, 类型为数组, default: [1/spiltCount, 1/spiltCount, ...]
• slots:
  • ...
• events:
  • @resize: 拖动分割条时触发, 参数为分割线两侧的div
  • @resize-stop: 拖动分割条结束时触发
• methods:
  • changeItemSize(index, itemSize, dire='next') 改变第item个pane的大小, dire为next或prev, 表示修改当前pane时连带修改前一个pane还是后一个

效果展示

设计思路

整个组件采用flex布局，通过设置整体的flex-direction控制分割方向，通过修改每个pane的style.flex控制每个pane的大小。

<div class="split-main" ref="splitMain"      :class="direction === 'vertical' ? 'split-vertical' : 'split-horizontal'">   <template v-if="direction === 'vertical'">     <div v-for="i in splitCount" :key="i" ref="splitItem"          class="split-vertical-item">       <div class="split-vertical-line" v-if="i < splitCount"            @mousedown="_startDrag(i)"            @touchstart="_startDrag(i)"></div>       <div class="split-vertical-content">         <slot :name="`pane${i}`"></slot>       </div>     </div>   </template>   <template v-else>     <div v-for="i in splitCount" :key="i" ref="splitItem"          class="split-horizontal-item">       <div class="split-horizontal-line" v-if="i < splitCount"            @mousedown="_startDrag(i)"            @touchstart="_startDrag(i)"></div>       <div class="split-horizontal-content">         <slot :name="`pane${i}`"></slot>       </div>     </div>   </template> </div> 

通过v-for循环生成分割数量的pane，每个pane中间插入分割线，分割线通过@mousedown和@touchstart事件绑定_startDrag方法，该方法用于监听鼠标或手指的移动事件，从而实现拖动分割线改变pane大小的功能。

_startDrag (index) {   this.dragIndex = index - 1 }, _onMouseMove (e) {   if (this.dragIndex === -1) {     return   }   let items = this.$refs.splitItem   let item1 = items[this.dragIndex]   let item2 = items[this.dragIndex + 1]   let rect1 = item1.getBoundingClientRect()   let rect2 = item2.getBoundingClientRect()   let ratio1, ratio2   let minLen = this.minLen   if (this.direction === 'vertical') {     let height = this.$refs.splitMain.clientHeight     let tempY = e.clientY - rect1.top > minLen ? e.clientY : rect1.top + minLen     tempY = rect2.bottom - tempY > minLen ? tempY : rect2.bottom - minLen     ratio1 = (tempY - rect1.top) / height     ratio2 = (rect2.bottom - tempY) / height   } else {     let width = this.$refs.splitMain.clientWidth     let tempX = e.clientX - rect1.left > minLen ? e.clientX : rect1.left + minLen     tempX = rect2.right - tempX > minLen ? tempX : rect2.right - minLen     ratio1 = (tempX - rect1.left) / width     ratio2 = (rect2.right - tempX) / width   }   item1.style.flex = ratio1   item2.style.flex = ratio2   e.preventDefault()   this.$emit('resize', item1, item2) }, _onMouseUp () {   if (this.dragIndex === -1) {     return   }   this.dragIndex = -1   this.$emit('resize-stop') } 

完整代码在github上。https://github.com/lxmghct/my-vue-components