2 changed files with 257 additions and 210 deletions
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<!-- 虚拟折叠面板 --> |
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<template> |
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<DynamicScroller |
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ref="scrollbarRef" |
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class="scroller" |
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:items="list" |
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:min-item-size="props.minItemSize" |
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:key-field="props.keyField" |
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v-slot="{ item, active }" |
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style="height: 100%" |
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@scroll="onScroll" |
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> |
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<DynamicScrollerItem :item="item" :active="active" :size-dependencies="[item.__expanded]"> |
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<div class="collapse-header" @click="toggleExpand(item)"> |
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<div class="collapse-header-left"> |
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<slot name="header" :item="item">{{ item[props.nameField] }}</slot> |
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</div> |
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|
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<div class="collapse-header-right" v-if="props.showArrowRight"> |
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<el-icon |
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class="arrow-right" |
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:class="{ 'rotate-icon': item.__expanded }" |
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:size="12" |
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:color="'#c1c1c1'" |
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> |
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<ArrowRight /> |
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</el-icon> |
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</div> |
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</div> |
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|
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<Transition name="fade" mode="out-in"> |
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<div class="collapse-content" v-show="item.__expanded"> |
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<slot name="content" :item="item"></slot> |
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</div> |
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</Transition> |
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</DynamicScrollerItem> |
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</DynamicScroller> |
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</template> |
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<script setup lang="ts"> |
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import { ref, onBeforeUnmount, onDeactivated } from 'vue' |
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import { ArrowRight } from '@element-plus/icons-vue' |
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import 'vue-virtual-scroller/dist/vue-virtual-scroller.css' |
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import { DynamicScroller, DynamicScrollerItem } from 'vue-virtual-scroller' |
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const emit = defineEmits(['scroll']) |
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const props = defineProps({ |
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data: { |
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type: Array as PropType<Record<string, any>[]>, |
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default: () => [] |
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}, |
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keyField: { |
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type: String, |
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default: 'id' |
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}, |
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nameField: { |
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type: String, |
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default: 'name' |
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}, |
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/** 每个项的最小高度 */ |
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minItemSize: { |
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type: Number, |
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default: 48 |
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}, |
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showArrowRight: { |
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type: Boolean, |
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default: true |
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} |
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}) |
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|
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const itemHeight = computed(() => props.minItemSize + 'px') |
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|
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const activeItem = ref<Record<string, any> | null>(null) |
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const list = computed(() => { |
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console.time('list') |
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const activeItemId = activeItem.value ? activeItem.value[props.keyField] : null |
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const newList = props.data.map((listItem: Record<string, any>) => { |
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return { |
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...listItem, |
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__expanded: activeItemId && listItem[props.keyField] === activeItemId ? true : false |
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} |
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}) |
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console.timeEnd('list') |
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return newList |
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}) |
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|
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const scrollbarRef = useTemplateRef('scrollbarRef') |
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const scrollbarScrollTop = ref(0) |
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function onScroll(e) { |
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scrollbarScrollTop.value = e.target.scrollTop |
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emit('scroll', e) |
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} |
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/** |
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* 切换折叠面板展开状态 |
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* @param item 要切换展开状态的项 |
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*/ |
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function toggleExpand(item) { |
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activeItem.value = item.__expanded ? null : item |
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} |
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/** |
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* 滚动到指定项 |
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* @param item 要滚动到的项 |
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*/ |
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function scrollToItem(item) { |
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if (!item) return |
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activeItem.value = item |
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var findIndex = list.value.findIndex((i) => i[props.keyField] === item[props.keyField]) |
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if (findIndex === -1) { |
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return |
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} |
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var top = props.minItemSize * findIndex |
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// 取消之前的动画 |
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cancelAnimationFrame(AnimationId.value as number) |
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scrollTo(scrollbarScrollTop.value, top, scrollbarScrollTop.value) |
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} |
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/** |
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* 滚动到指定索引项 |
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* @param index 要滚动到的索引项 |
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*/ |
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function scrollToIndex(index) { |
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if (index < 0 || index >= list.value.length) return |
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|
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activeItem.value = list.value[index] |
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|
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var top = props.minItemSize * index |
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// 取消之前的动画 |
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cancelAnimationFrame(AnimationId.value as number) |
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scrollTo(scrollbarScrollTop.value, top, scrollbarScrollTop.value) |
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} |
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/** |
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* 滚动到指定位置 |
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* @param position 要滚动到的位置 |
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*/ |
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function scrollToPosition(position: number) { |
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|
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if (position < 0) return |
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// 取消之前的动画 |
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cancelAnimationFrame(AnimationId.value as number) |
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scrollTo(scrollbarScrollTop.value, position, scrollbarScrollTop.value) |
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} |
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|
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// 滚动到指定位置 |
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const AnimationId = ref<number>() |
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function scrollTo(from: number, to: number, current: number) { |
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if (scrollbarScrollTop.value === to) { |
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return |
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} |
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const speed = (to - from) / 30 |
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|
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if (speed < 0) { |
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if (current <= to) { |
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return |
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} |
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} else if (speed > 0) { |
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if (current >= to) { |
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return |
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} |
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} |
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current = current + speed |
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|
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// DynamicScroller内部用的RecycleScroller组件，所以滚动到指定位置用RecycleScroller方法 |
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scrollbarRef.value?.$refs?.scroller?.scrollToPosition(current) |
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AnimationId.value = requestAnimationFrame(() => { |
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scrollTo(from, to, current) |
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}) |
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} |
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onDeactivated(() => { |
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// 组件销毁时取消动画 |
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cancelAnimationFrame(AnimationId.value as number) |
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}) |
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onBeforeUnmount(() => { |
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// 组件销毁时取消动画 |
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cancelAnimationFrame(AnimationId.value as number) |
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}) |
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defineExpose({ |
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toggleExpand, |
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scrollToItem, |
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scrollToIndex, |
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scrollToPosition |
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}) |
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</script> |
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<style lang="scss" scoped> |
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.collapse-header { |
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display: flex; |
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flex-direction: row; |
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align-items: center; |
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width: 100%; |
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overflow: hidden; |
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|
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height: v-bind(itemHeight); |
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padding: 0 4px; |
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cursor: pointer; |
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border-bottom: 1px solid rgba(0, 0, 0, 0.1); |
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box-sizing: border-box; |
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.collapse-header-left { |
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font-size: 12px; |
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color: #303133; |
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flex: 1; |
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} |
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} |
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.collapse-content { |
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transform-origin: top; |
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border-bottom: 1px solid rgba(0, 0, 0, 0.1); |
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} |
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// collapse-content显示隐藏动画 |
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.fade-enter-active, |
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.fade-leave-active { |
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transition: all 0.2s ease; |
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} |
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|
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.fade-enter-from, |
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.fade-leave-to { |
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opacity: 0; |
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transform: scaleY(0); |
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} |
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.arrow-right { |
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transition: all 0.2s ease; |
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} |
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.rotate-icon { |
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transform: rotate(90deg); |
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} |
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::-webkit-scrollbar-thumb { |
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background: rgba(0, 0, 0, 0.1) !important; |
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border-radius: 4px; |
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} |
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|
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::-webkit-scrollbar { |
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width: 8px; |
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background-color: #f5f5f5; |
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} |
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</style> |
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