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<template>
  <div class="category">
    <header class="g-header-container">
      <category-header/>
    </header>
    <div class="g-content-container">
      <div class="sidebar">
        <category-tab/>
      </div>
      <div class="main"></div>
    </div>
  </div>
</template>
 
<script>
  import CategoryHeader from './header';
  import CategoryTab from './tab';
  import CategoryContent from './content';
 
  export default {
    name: 'Category',
    components: {
      CategoryHeader,
      CategoryTab,
      CategoryContent
    }
  };
</script>
 
<style lang="scss" scoped>
  @import "~assets/scss/mixins";
 
  .category {
    overflow: hidden;
    width: 100%;
    height: 100%;
    background-color: $bgc-theme;
  }
 
  .g-content-container {
    display: flex;
  }
 
  .sidebar {
    width: 80px;
    height: 100%;
  }
 
  .main {
    flex: 1;
    height: 100%;
  }
</style>
 
-----------------------------------------------------------------------------------------------
 
<template>
  <me-scroll :scrollbar="false">
    <ul class="tab">
      <li
        class="tab-item"
        :class="{'tab-item-active': item.id === curId}"
        v-for="(item, index) in items"
        :key="index"
        @click="switchTab(item.id)"
      >{{item.name}}
      </li>
    </ul>
  </me-scroll>
</template>
 
<script>
  import MeScroll from 'base/scroll';
  import {categoryNames} from './config';
 
  export default {
    name: 'CategoryTab',
    components: {
      MeScroll
    },
    data() {
      return {
        curId: ''
      };
    },
    created() {
      this.init();
      this.switchTab(this.items[0].id);
    },
    methods: {
      init() {
        this.items = categoryNames;
      },
      switchTab(id) {
        if (this.curId === id) {
          return;
        }
        this.curId = id;
        this.$emit('switch-tab', id);
      }
    }
  };
</script>
 
<style lang="scss" scoped>
  @import "~assets/scss/mixins";
 
  $tab-item-height: 46px;
 
  .tab {
    width: 100%;
 
    &-item {
      height: $tab-item-height;
      background-color: #fff;
      border-right: 1px solid $border-color;
      border-bottom: 1px solid $border-color;
      color: #080808;
      font-size: $font-size-l;
      font-weight: bold;
      text-align: center;
      line-height: $tab-item-height;
      @include ellipsis();
 
      &:last-child {
        border-bottom: none;
      }
    }
 
    &-item-active {
      background: none;
      border-right: none;
      color: #f23030;
    }
  }
</style>
 
------------------------------------------------------------------------------------------------
 
<template>
  <swiper :options="swiperOption" ref='swiper'>
    <!-- 下拉 -->
    <div class="mine-scroll-pull-down" v-if="pullDown">
      <me-loading :text="pullDownText" inline ref="pullDownLoading"/>
    </div>
    <swiper-slide>
      <slot></slot>
    </swiper-slide>
    <!-- 上拉 -->
    <div class="mine-scroll-pull-up" v-if="pullUp">
      <me-loading :text="pullUpText" inline ref="pullUpLoading"/>
    </div>
    <div class="swiper-scrollbar" v-if="scrollbar" slot="scrollbar"></div>
  </swiper>
</template>
 
<script>
 
  import {swiper, swiperSlide} from 'vue-awesome-swiper';
  import MeLoading from 'base/loading';
  import {
    PULL_DOWN_HEIGHT,
    PULL_DOWN_TEXT_INIT,
    PULL_DOWN_TEXT_START,
    PULL_DOWN_TEXT_ING,
    PULL_DOWN_TEXT_END,
    PULL_UP_HEIGHT,
    PULL_UP_TEXT_INIT,
    PULL_UP_TEXT_START,
    PULL_UP_TEXT_ING,
    PULL_UP_TEXT_END
  } from './config';
 
  export default {
    name: 'MeScroll',
    components: {
      swiper,
      swiperSlide,
      MeLoading
 
    },
    props: {
      scrollbar: {
        type: Boolean,
        default: true
      },
      data: {
        type: [Array, Object]
      },
      pullDown: {
        type: Boolean,
        default: false
      },
      pullUp: {
        type: Boolean,
        default: false
      }
    },
    // data() {
    //   return { // 下拉参数设置
    //     pulling: false,
    //     pullDownText: PULL_DOWN_TEXT_INIT,
    //     pullUpText: PULL_DOWN_TEXT_INIT,//没有
    //     swiperOption: {
    //       direction: 'vertical',
    //       slidesPerView: 'auto',
    //       freeMode: true,
    //       setWrapperSize: true,
    //       scrollbar: {
    //         el: this.scrollbar ? '.swiper-scrollbar' : null,
    //         hide: true
    //       },
    //       on: {
    //         sliderMove: this.scroll,
    //         touchEnd: this.touchEnd,
    //         // transitionEnd: this.scrollEnd
    //       }
    //     }
    //   };
    // },
    watch: {
      data() {
        this.update();
      }
    },
    created() {
      this.init();
    },
    methods: {
      update() {
        this.$refs.swiper && this.$refs.swiper.swiper.update();
      },
      scrollToTop(speed, runCallbacks) {
        this.$refs.swiper && this.$refs.swiper.swiper.slideTo(0, speed, runCallbacks);
      },
      init() {
        this.pulling = false;
        this.pullDownText = PULL_DOWN_TEXT_INIT;
        this.pullUpText = PULL_DOWN_TEXT_INIT;// 没有
        this.swiperOption = {
          direction: 'vertical',
          slidesPerView: 'auto',
          freeMode: true,
          setWrapperSize: true,
          scrollbar: {
            el: this.scrollbar ? '.swiper-scrollbar' : null,
            hide: true
          },
          on: {
            sliderMove: this.scroll,
            touchEnd: this.touchEnd,
            transitionEnd: this.scrollEnd // 向上滑动时监听scrollEnd
          }
        };
      },
 
      scroll() {
        const swiper = this.$refs.swiper.swiper;
        // 监控什么时候出现回到顶部
 
        this.$emit('scroll', swiper.translate, this.$refs.swiper.swiper);
 
        if (this.pulling) {
          return;
        }
        console.log(swiper.translate);
        if (swiper.translate > 0) { // 下拉
          if (!this.pullDown) {
            return;
          }
          if (swiper.translate > PULL_DOWN_HEIGHT) {
            this.$refs.pullDownLoading.setText(PULL_DOWN_TEXT_START);
          } else {
            this.$refs.pullDownLoading.setText(PULL_DOWN_TEXT_INIT);
          }
        } else if (swiper.isEnd) { // 上拉
          if (!this.pullUp) {
            return;
          }
 
          const isPullUp = Math.abs(swiper.translate) + swiper.height - PULL_UP_HEIGHT > parseInt(swiper.$wrapperEl.css('height'));
 
          if (isPullUp) {
            this.$refs.pullUpLoading.setText(PULL_UP_TEXT_START);
          } else {
            this.$refs.pullUpLoading.setText(PULL_UP_TEXT_INIT);
          }
        }
      },
      scrollEnd() {
        const swiper = this.$refs.swiper.swiper;
 
        this.$emit('scroll-end', swiper.translate, swiper, this.pulling);
      },
      touchEnd() {
        if (this.pulling) {
          return;
        }
        const swiper = this.$refs.swiper.swiper;
 
        if (swiper.translate > PULL_DOWN_HEIGHT) { // 下拉
          if (!this.pullDown) {
            return;
          }
          this.pulling = true;
          swiper.allowTouchMove = false;// 禁止触摸
          swiper.setTransition(swiper.params.speed);
          swiper.setTranslate(PULL_DOWN_HEIGHT);
          swiper.params.virtualTranslate = true;// 定住不给回弹
          this.$refs.pullDownLoading.setText(PULL_DOWN_TEXT_ING);
          this.$emit('pull-down', this.pullDownEnd);// 触发一个事件
        } else if (swiper.isEnd) { // 底部
          const totalHeight = parseInt(swiper.$wrapperEl.css('height'));
          const isPullUp = Math.abs(swiper.translate) + swiper.height - PULL_UP_HEIGHT > totalHeight;
 
          if (isPullUp) { // 上拉
            if (!this.pullUp) {
              return;
            }
            this.pulling = true;
            swiper.allowTouchMove = false; // 禁止触摸
            swiper.setTransition(swiper.params.speed);
            swiper.setTranslate(-(totalHeight + PULL_UP_HEIGHT - swiper.height));
            swiper.params.virtualTranslate = true; // 定住不给回弹
            this.$refs.pullUpLoading.setText(PULL_UP_TEXT_ING);
            this.$emit('pull-up', this.pullUpEnd);
          }
        }
      },
      pullDownEnd() {
        const swiper = this.$refs.swiper.swiper;
        this.pulling = false;
        this.$refs.pullDownLoading.setText(PULL_DOWN_TEXT_END);
        swiper.params.virtualTranslate = false;
        swiper.allowTouchMove = true;
        swiper.setTransition(swiper.params.speed);
        swiper.setTranslate(0);
        setTimeout(() => {
          this.$emit('pull-down-transition-end');
        }, swiper.params.speed);
      },
      pullUpEnd() {
        const swiper = this.$refs.swiper.swiper;
        this.pulling = false;
        this.$refs.pullUpLoading.setText(PULL_UP_TEXT_END);
        swiper.params.virtualTranslate = false;
        swiper.allowTouchMove = true;
      }
    }
  };
</script>
<style lang="scss" scoped>
  .swiper-container {
    overflow: hidden;
    width: 100%;
    height: 100%;
  };
 
  .swiper-slide {
    height: auto;
  }
  .mine-scroll-pull-up,
  .mine-scroll-pull-down {
    position: absolute;
    left: 0;
    width: 100%;
  }
  .mine-scroll-pull-down {
    bottom: 100%;
    height: 80px;
  }
 
  .mine-scroll-pull-up {
    top: 100%;
    height: 30px;
  }
</style>