import Vue from 'vue'
import Vuex from 'vuex'
Vue.use(Vuex)
export default new Vuex.Store({
  state: {
    // 暗黑模式
    isDark: false,
    // 布局類型
    layoutType: 'default'
  },
  mutations: {
    // 修改暗黑模式
    set_is_dark(state, val) {
      state.isDark = val
    },
    // 修改布局類型
    set_layout_type(state, val) {
      state.layoutType = val
    }
  },
  actions: {
  },
  modules: {
  }
})

<template>
    <!-- 縮略圖 -->
    <div class="thumbnail">
        <div class="layout" v-for="(item, index) in layouts" @click="changeCheck(item, index)">
            <template v-if="item.type == 'default'">
                <div class="top" :style="{ background: isDark ? 'black' : '#fff' }"></div>
                <div class="left" :style="{ background: isDark ? 'black' : '#fff' }"></div>
            </template>
            <template v-if="item.type == 'top'">
                <div class="top" :style="{ background: isDark ? 'black' : '#fff' }"></div>
            </template>
            <template v-if="item.type == 'slide'">
                <div class="top"></div>
                <div class="left" :style="{ background: isDark ? 'black' : '#fff' }"></div>
            </template>
            <i class="el-icon-check" v-show="checked == index"></i>
        </div>
    </div>
</template>
<script>
import { mapState } from 'vuex'
export default {
    props: {
        // 布局類型數(shù)組
        layouts: {
            type: Array,
            default: () => []
        }
    },
    data() {
        return {
            // 當(dāng)前選中值
            checked: 0,
        }
    },
    computed: {
        // 獲取是否是暗黑模式，從而縮略圖實(shí)現(xiàn)暗黑效果
        ...mapState(['isDark'])
    },
    methods: {
        // 切換選中值
        changeCheck(item, index) {
            this.checked = index
            this.$store.commit('set_layout_type', item.type)
        }
    }
}
</script>
<style lang="less" scoped>
.thumbnail {
    display: flex;
    width: 100%;
    .layout {
        position: relative;
        width: 50px;
        height: 50px;
        border: 1px solid gray;
        overflow: hidden;
        background: #f0f0f0;
        border-radius: 5px;
        cursor: pointer;
        .top {
            position: absolute;
            left: 0;
            top: 0;
            width: 100%;
            height: 25%;
        }
        .left {
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 25%;
            height: 100%;
        }
        .el-icon-check {
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            font-size: 20px;
        }
    }
}
</style>

<template>
  <!-- 側(cè)邊欄布局 -->
  <div>
    <Sliderbar></Sliderbar>
    <Header></Header>
    <div class="content-box">
      <router-view />
    </div>
  </div>
</template>
<script>
import Sliderbar from '@/components/Sliderbar.vue'
import Header from '@/components/Header.vue'
export default {
  components: {
    Header,
    Sliderbar,
  },
}
</script>
<style lang="less" scoped></style>

<template>
  <!-- 默認(rèn)布局 -->
  <div>
    <Header></Header>
    <Sliderbar></Sliderbar>
    <div class="content-box">
      <router-view />
    </div>
  </div>
</template>
<script>
import Header from '@/components/Header.vue'
import Sliderbar from '@/components/Sliderbar.vue'
export default {
  components: { Header, Sliderbar },
}
</script>
<style lang="less" scoped></style>

<template>
  <!-- 頂欄布局 -->
  <div>
    <Header></Header>
    <div class="content-box">
      <router-view />
    </div>
  </div>
</template>
<script>
import Header from '@/components/Header.vue'
export default {
  components: {
    Header,
  },
}
</script>
<style lang="less" scoped></style>

<template>
    <!-- vuex獲取選中的布局類型 -->
    <div>
        <defaultLayout v-show="layoutType == 'default'"></defaultLayout>
        <slideLayout v-show="layoutType == 'slide'"></slideLayout>
        <topLayout v-show="layoutType == 'top'"></topLayout>
    </div>
</template>
<script>
import defaultLayout from './layout/DefaultLayout.vue'
import slideLayout from './layout/SlideLayout.vue'
import topLayout from './layout/TopLayout.vue'
import { mapState } from 'vuex'
export default {
    components: { defaultLayout, slideLayout, topLayout },
    computed: {
        ...mapState(['layoutType'])
    },
}
</script>
<style lang="less" scoped></style>

  computed: {
    ...mapState(['isDark']),
    // computed property "isDark" was assigned to but it has no setter.  這是因?yàn)閏omputed為只讀的。不能直接修改computed的數(shù)據(jù)，要想修改則使用set
    darkMode: {
      get() {
        return this.isDark
      },
      set(val) {
        this.$store.commit('set_is_dark', val)
        // 獲取html根元素標(biāo)簽
        let html = document.documentElement
        if (val) {
          // html添加class="dark"選擇器
          html.classList.add('dark')
        } else {
          // html移除class="dark"選擇器
          html.classList.remove('dark')
        }
      }
    }
  },