From 5744befb6a1d050394502e464768283b59d7e64f Mon Sep 17 00:00:00 2001
From: jiaming <743192023@qq.com>
Date: Sat, 8 Dec 2018 19:05:46 +0800
Subject: [PATCH] add scroll board component

---
 src/components/scrollBoard/index.vue | 149 +++++++++++++++++++++++++++
 1 file changed, 149 insertions(+)
 create mode 100644 src/components/scrollBoard/index.vue

diff --git a/src/components/scrollBoard/index.vue b/src/components/scrollBoard/index.vue
new file mode 100644
index 0000000..1a74fb8
--- /dev/null
+++ b/src/components/scrollBoard/index.vue
@@ -0,0 +1,149 @@
+<template>
+  <div class="scroll-board">
+
+    <loading v-if="!data" />
+
+    <template v-else>
+      <div :class="`scroll-item ${item.index % 2 === 0 ? 'deep' : 'light'} ${fade && index === 0 && 'fade'}`"
+        v-for="(item, index) in scrollData"
+        :key="item.title + index"
+        :style="`height: ${100 / (data.showItemNum || 5)}%`">
+        <div class="index">{{ item.index }}</div>
+        <div class="title">{{ item.title }}</div>
+        <div class="info">{{ item.info }}</div>
+      </div>
+    </template>
+  </div>
+</template>
+
+<script>
+export default {
+  name: 'scroll-board',
+  props: ['data'],
+  data () {
+    return {
+      dealAfterData: [],
+
+      fade: false,
+      scrollData: [],
+      currentTopIndex: 0,
+
+      autoScrollHandler: ''
+    }
+  },
+  watch: {
+    data () {
+      const { init } = this
+
+      init()
+    }
+  },
+  methods: {
+    init () {
+      const { data, autoScrollHandler, getDealAfterData, getCurrentScrollData } = this
+
+      if (!data) return
+
+      autoScrollHandler && clearTimeout(autoScrollHandler)
+
+      getDealAfterData()
+
+      getCurrentScrollData()
+    },
+    getDealAfterData () {
+      const { data: { data } } = this
+
+      this.dealAfterData = data.map(({ title, info }, i) => ({ index: i + 1, title, info }))
+    },
+    getCurrentScrollData () {
+      const { dealAfterData, data: { showItemNum }, currentTopIndex, doFade } = this
+
+      if (dealAfterData.length < showItemNum) return
+
+      const tempArray = dealAfterData.slice(currentTopIndex, currentTopIndex + showItemNum + 1)
+
+      const appendNum = showItemNum - tempArray.length + 1
+
+      tempArray.push(...dealAfterData.slice(0, appendNum))
+
+      this.scrollData = tempArray
+
+      setTimeout(doFade, 1500)
+    },
+    doFade () {
+      const { reGetCurrentScrollData } = this
+
+      this.fade = true
+
+      setTimeout(reGetCurrentScrollData, 1500)
+    },
+    reGetCurrentScrollData () {
+      const { getCurrentScrollData, dealAfterData, currentTopIndex } = this
+
+      this.fade = false
+
+      const tempNextIndex = currentTopIndex + 1
+
+      this.currentTopIndex = (tempNextIndex === dealAfterData.length ? 0 : tempNextIndex)
+
+      getCurrentScrollData()
+    }
+  },
+  created () {
+    const { init } = this
+
+    init()
+  }
+}
+</script>
+
+<style lang="less">
+.scroll-board {
+  width: 100%;
+  height: 100%;
+  overflow: hidden;
+
+  .fade {
+    height: 0% !important;
+  }
+
+  .deep {
+    background-color: rgba(9, 37, 50, 0.4);
+  }
+
+  .light {
+    background-color: rgba(10, 32, 50, 0.3);
+  }
+
+  .scroll-item {
+    display: flex;
+    flex-direction: row;
+    align-items: center;
+    transition: all 1s;
+    overflow: hidden;
+
+    .index {
+      width: 20px;
+      height: 20px;
+      border-radius: 50%;
+      text-align: center;
+      line-height: 20px;
+      font-size: 14px;
+      background-color: #00baff;
+      margin-left: 10px;
+    }
+
+    .title {
+      font-size: 12px;
+      width: 25%;
+      overflow: hidden;
+      text-overflow: ellipsis;
+      white-space: nowrap;
+    }
+
+    .info {
+      font-size: 14px;
+    }
+  }
+}
+</style>