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| <template>
| <!--本文件由FirstUI授权予四川政采招投标咨询有限公司（会员ID：16 3，营业执照号： 91510 13133 2 00 6 193 K）专用，请尊重知识产权，勿私下传播，违者追究法律责任。-->
| <view class="fui-waterfall__wrap" :style="{height:height+'px'}">
| <slot></slot>
| </view>
| </template>
|
| <script>
| export default {
| name: "fui-waterfall",
| emits: ['init', 'end'],
| props: {
| columnGap: {
| type: [Number, String],
| default: 24
| },
| topGap: {
| type: [Number, String],
| default: 24
| },
| leftGap: {
| type: [Number, String],
| default: 0
| },
| rightGap: {
| type: [Number, String],
| default: 0
| },
| isBefore: {
| type: Boolean,
| default: false
| }
| },
| provide() {
| return {
| waterfall: this
| }
| },
| data() {
| return {
| height: 0,
| itemWidth: 0,
| leftHeight: 0,
| rightHeight: 0,
| tGap: 0,
| lGap: 0,
| x2: 0
| };
| },
| created() {
| this.childrenArr = []
| this.loadedArr = []
| this.loadedChild = []
| this.initParam()
| },
| // #ifndef VUE3
| beforeDestroy() {
| this.childrenArr = null
| this.loadedArr = null
| this.loadedChild = null
| },
| // #endif
| // #ifdef VUE3
| beforeUnmount() {
| this.childrenArr = null
| this.loadedArr = null
| this.loadedChild = null
| },
| // #endif
| methods: {
| getPx(value) {
| let val = parseInt(uni.upx2px(Number(value)))
| return val % 2 === 0 ? val : val + 1
| },
| initParam(callback) {
| this.tGap = this.getPx(this.topGap)
| this.lGap = this.getPx(this.leftGap)
| const colGap = this.getPx(this.columnGap)
| const rGap = this.getPx(this.rightGap)
| const sys = uni.getSystemInfoSync()
| const gap = colGap + this.lGap + rGap;
| this.itemWidth = (sys.windowWidth - gap) / 2
| this.x2 = this.lGap + this.itemWidth + colGap
| callback && callback(this.itemWidth)
| this.$emit('init', {
| itemWidth: this.itemWidth
| })
| },
| //重置加载
| resetLoadmore() {
| this.leftHeight = 0
| this.rightHeight = 0
| this.height = 0
| this.childrenArr = []
| this.loadedArr = []
| this.loadedChild = []
| },
| getWaterfallInfo(itemHeight, callback) {
| if (!itemHeight) return;
| let x = this.lGap;
| let y = 0;
| let itemGap = 0;
| if (this.leftHeight <= this.rightHeight) {
| y = this.leftHeight;
|
| if (this.leftHeight == 0) {
| this.leftHeight += itemHeight;
| } else {
| itemGap = this.tGap;
| y += this.tGap;
| this.leftHeight += itemHeight + this.tGap;
| }
| } else {
| x = this.x2;
| y = this.rightHeight;
|
| if (this.rightHeight == 0) {
| this.rightHeight += itemHeight;
| } else {
| itemGap = this.tGap;
| y += this.tGap;
| this.rightHeight += itemHeight + this.tGap;
| }
| }
| callback && callback({
| x,
| y,
| itemGap
| })
| },
| setWaterfallHeight(itemGap) {
| this.height = Math.ceil(Math.max(this.leftHeight, this.rightHeight) + itemGap);
| },
| startSorting() {
| let clen = this.childrenArr.length
| let llen = this.loadedArr.length
| if (clen == llen && llen > 0) {
| let itemGap = 0
| if (this.isBefore) {
| this.leftHeight = 0
| this.rightHeight = 0
| this.loadedChild = this.childrenArr.concat(this.loadedChild)
| } else {
| this.loadedChild = this.loadedChild.concat(this.childrenArr)
| }
| const usageData = this.isBefore ? this.loadedChild : this.childrenArr;
| usageData.forEach((item, index) => {
| this.getWaterfallInfo(item.height, (res) => {
| itemGap = res.itemGap
| // #ifdef APP-NVUE
| item.aniTransForm(res.x, res.y)
| item.transform = `translate(${res.x}px,${res.y}px)`
| // #endif
| // #ifndef APP-NVUE
| item.transform = `translate3d(${res.x}px,${res.y}px,0)`
| // #endif
| setTimeout(() => {
| item.isShow = true
| }, 20)
| })
| })
| this.setWaterfallHeight(itemGap)
| this.childrenArr = []
| this.loadedArr = []
| this.$emit('end', {})
| }
| }
| }
| }
| </script>
|
| <style scoped>
| .fui-waterfall__wrap {
| /* #ifndef APP-NVUE */
| width: 100%;
| box-sizing: border-box;
| /* #endif */
| position: relative;
| /* #ifdef APP-NVUE */
| flex: 1;
| /* #endif */
| }
| </style>
|
|
