perf: 优化多标签滚动

This commit is contained in:
张传龙
2022-06-11 20:17:30 +08:00
parent 67d966e096
commit 0636ac4716
7 changed files with 196 additions and 89 deletions

View File

@@ -20,5 +20,7 @@ export { default as IconExit } from '~icons/mdi/exit-to-app'
export { default as IconFullscreen } from '~icons/ant-design/fullscreen-outlined'
export { default as IconFullscreenExit } from '~icons/ant-design/fullscreen-exit-outlined'
export { default as IconArrowLeft } from '~icons/ic/baseline-keyboard-arrow-left'
export { default as IconArrowRight } from '~icons/ic/baseline-keyboard-arrow-right'
export { default as IconLogo } from './IconLogo.vue'

View File

@@ -0,0 +1,145 @@
<template>
<div ref="wrapper" class="tags-wrapper" @mousewheel.prevent="handleMouseWheel">
<template v-if="showArrow && isOverflow">
<div class="left" @click="handleMouseWheel({ wheelDelta: 50 })">
<IconArrowLeft />
</div>
<div class="right" @click="handleMouseWheel({ wheelDelta: -50 })">
<IconArrowRight />
</div>
</template>
<div
ref="content"
class="tags-content"
:class="{ overflow: isOverflow && showArrow }"
:style="{
height: height + 'px',
transform: `translateX(${translateX}px)`,
}"
>
<slot />
</div>
</div>
</template>
<script setup>
import { ref, onMounted } from 'vue'
import { IconArrowLeft, IconArrowRight } from '@/components/AppIcons'
import { debounce } from '@/utils'
import { isNullOrUndef } from '@/utils/is'
defineProps({
height: {
type: Number,
default: 50,
},
showArrow: {
type: Boolean,
default: true,
},
})
onMounted(() => {
refreshIsOverflow()
})
const translateX = ref(0)
const content = ref(null)
const wrapper = ref(null)
const isOverflow = ref(false)
function refreshIsOverflow(isIncrease) {
isOverflow.value = content.value.offsetWidth > wrapper.value.offsetWidth
if (isNullOrUndef(isIncrease)) return
if (isOverflow.value) {
handleMouseWheel({ wheelDelta: isIncrease ? -100 : 100 })
} else if (!isIncrease && translateX.value < 0) {
handleMouseWheel({ wheelDelta: 100 })
}
}
function handleMouseWheel(e) {
const { wheelDelta } = e
const wrapperWidth = wrapper.value.offsetWidth
const contentWidth = content.value.offsetWidth
/**
* @wheelDelta 平行滚动的值 >0 右移 <0: 左移
* @translateX 内容translateX的值
* @wrapperWidth 容器的宽度
* @contentWidth 内容的宽度
*/
if (wheelDelta < 0 && -translateX.value > contentWidth - wrapperWidth + 10) {
return
}
if (wheelDelta > 0 && translateX.value > 10) {
return
}
translateX.value += wheelDelta
resetTranslateX(wrapperWidth, contentWidth)
}
const resetTranslateX = debounce(function (wrapperWidth, contentWidth) {
if (!isOverflow.value) {
translateX.value = 0
} else if (-translateX.value > contentWidth - wrapperWidth) {
translateX.value = wrapperWidth - contentWidth
} else if (translateX.value > 0) {
translateX.value = 0
}
}, 200)
defineExpose({
refreshIsOverflow,
})
</script>
<style lang="scss" scoped>
.tags-wrapper {
display: flex;
background-color: #fff;
position: sticky;
top: 0;
z-index: 9;
overflow: hidden;
.tags-content {
padding: 0 10px;
display: flex;
align-items: center;
flex-wrap: nowrap;
transition: transform 0.5s;
&.overflow {
padding-left: 30px;
padding-right: 30px;
}
}
.left,
.right {
background-color: #fff;
position: absolute;
top: 0;
bottom: 0;
margin: auto;
width: 20px;
height: 35px;
display: flex;
align-items: center;
justify-content: center;
font-size: 18px;
border: 1px solid #e0e0e6;
border-radius: 2px;
z-index: 2;
cursor: pointer;
}
.left {
left: 0;
}
.right {
right: 0;
}
}
</style>