<template>
  <ul class="triangle_step">
    <li
      :class="{cur:active>=index}"
      v-for="(item,index) in stepArr"
      :key="index"
      :style="{width:width}"
      @click="handlStepsClick(index)"
    >
      <span class="titlebox">{{ item.title }}</span>
      <div
        v-if="index<stepArr.length-1"
        :class="active>=index?'jiaoActive':'jiao'"
      />
      <div class="interval" />
    </li>
  </ul>
</template>
<script>
export default {
  name: 'AimsSteps',
  props: {
    active: {
      default: 0
    },
    stepArr: {
      default: []
    },
    width: {
      default: '100%'
    },
    stepFlag: {
      default: false
    }
  },
  data () {
    return {
    }
  },
  methods: {
    handlStepsClick (index) {
      if (this.stepFlag) {
        this.$emit('change', index)
      }
    }
  }
}
</script>
<style scoped lang="scss">
    *{
        margin: 0;
        padding: 0;
        list-style: none;
        font-size: 12px;
    }
    .triangle_step{
        height: 40px;
        display: flex;
        justify-content: center;
        align-items: center;
        margin: 10px auto;
        li{
            height: 40px;
            background: #F5F7FA;
            color:#666;
            text-align: center;
            line-height: 40px;
            /*width: 20%;*/
            /*flex-basis: 100%;*/
            position: relative;
            cursor: pointer;
        }
        li.cur{
            background: #E6EEFB;
            color: #4E80F8;
            // cursor: pointer;
        }
        .titlebox{
          text-align: center;
         white-space: nowrap;
        text-overflow: ellipsis
        }
        /*三角形绘制*/
        .jiao{
            width: 0;
            height: 0;
            border-top: 20px solid transparent;/*高度一半*/
            border-left: 20px solid #F5F7FA; /*调整宽度*/
            border-bottom: 20px solid transparent;/*高度一半*/
            position: absolute;
            right:-20px;/*跟宽度保持一致*/
            top:0;
            z-index: 2;
        }
        .jiaoActive{
            width: 0;
            height: 0;
            border-top: 20px solid transparent;/*高度一半*/
            border-left: 20px solid #E6EEFB; /*调整宽度*/
            border-bottom: 20px solid transparent;/*高度一半*/
            position: absolute;
            right:-20px;/*跟宽度保持一致*/
            top:0;
            z-index: 2;
        }
        /*大3个px的边 26-20/2*/
        .interval{
            width: 0;
            height: 0;
            border-top: 26px solid transparent;/*高度一半*/
            border-left: 26px solid #fff; /*调整宽度*/
            border-bottom: 26px solid transparent;/*高度一半*/
            position: absolute;
            right:-26px;/*跟宽度保持一致*/
            top:-6px;
            z-index: 1;
        }
      li:last-child .interval{
        display: none;
      }
    }
</style>