category.vue
1.99 KB
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<template>
<div class="category-box" ref="scrollBox" v-if="category && category.list">
<div class="box" ref="scrollItemsBox" :style="'width: ' + scrollItemBox + 'vw'">
<div class="item" :class="{'active': category.params.pid == item.id}" v-for="(item, index) in category.list" :key="index" @click="change(item)">
{{item.title}}
</div>
</div>
</div>
</template>
<script>
export default {
data() {
return {
basicWidth: 92,
scrollItemBox: 92
};
},
props: ["category"],
methods: {
/**
* 切换分类
* @param {object} item [分类项目对象]
*/
change(item) {
if (typeof this.category === "object" && typeof this.category.funcs === "object" && typeof this.category.funcs.change === "function") {
this.category.funcs.change(item);
}
}
},
watch: {
/**
* 监听分类列表变化
*/
"category.list"(newVal, oldVal) {
this.$nextTick(() => {
// 判断如果有列表数据再执行
if (newVal && newVal.length) {
// box滚动元素宽度，item对象
let scrollItemBox = 0;
let clientWidth = this.$refs.scrollBox.clientWidth;
let multiple = clientWidth / 750;
let childrens = this.$refs.scrollItemsBox.children;
// 遍历子元素，获取box宽度
for (let i = 0; i < childrens.length; i++) {
scrollItemBox += childrens[i].clientWidth;
}
// 根据屏幕比例计算实际设置vw值
scrollItemBox = (scrollItemBox + ((60 * multiple * (childrens.length - 1)))) / clientWidth * this.basicWidth;
// 判断scrollItemBox值，更新this.scrollItemBox宽度
if (scrollItemBox > this.basicWidth) {
this.$set(this, "scrollItemBox", scrollItemBox + (scrollItemBox * 0.03));
} else {
this.$set(this, "scrollItemBox", this.basicWidth);
}
}
});
}
}
}
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style rel="stylesheet/less" lang="less" scoped>
@import './category';
</style>