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<template>
<view
class="u-grid"
ref='u-grid'
:style="[gridStyle]"
>
<slot />
</view>
</template>
<script>
import props from './props.js';
/**
* grid 宫格布局
* @description 宫格组件一般用于同时展示多个同类项目的场景,可以给宫格的项目设置徽标组件(badge),或者图标等,也可以扩展为左右滑动的轮播形式。
* @tutorial https://www.uviewui.com/components/grid.html
* @property {String | Number} col 宫格的列数(默认 3 )
* @property {Boolean} border 是否显示宫格的边框(默认 false )
* @property {String} align 宫格对齐方式,表现为数量少的时候,靠左,居中,还是靠右 (默认 'left' )
* @property {Object} customStyle 定义需要用到的外部样式
* @event {Function} click 点击宫格触发
* @example <u-grid :col="3" @click="click"></u-grid>
*/
export default {
name: 'u-grid',
mixins: [uni.$u.mpMixin, uni.$u.mixin,props],
data() {
return {
index: 0,
width: 0
}
},
watch: {
// 当父组件需要子组件需要共享的参数发生了变化,手动通知子组件
parentData() {
if (this.children.length) {
this.children.map(child => {
// 判断子组件(u-radio)如果有updateParentData方法的话,就就执行(执行的结果是子组件重新从父组件拉取了最新的值)
typeof(child.updateParentData) == 'function' && child.updateParentData();
})
}
},
},
created() {
// 如果将children定义在data中,在微信小程序会造成循环引用而报错
this.children = []
},
computed: {
// 计算父组件的值是否发生变化
parentData() {
return [this.hoverClass, this.col, this.size, this.border];
},
// 宫格对齐方式
gridStyle() {
let style = {};
switch (this.align) {
case 'left':
style.justifyContent = 'flex-start';
break;
case 'center':
style.justifyContent = 'center';
break;
case 'right':
style.justifyContent = 'flex-end';
break;
default:
style.justifyContent = 'flex-start';
};
return uni.$u.deepMerge(style, uni.$u.addStyle(this.customStyle));
}
},
methods: {
// 此方法由u-grid-item触发,用于在u-grid发出事件
childClick(name) {
this.$emit('click', name)
}
}
};
</script>
<style lang="scss" scoped>
@import "../../libs/css/components.scss";
$u-grid-width:100% !default;
.u-grid {
/* #ifdef MP */
width: $u-grid-width;
position: relative;
box-sizing: border-box;
overflow: hidden;
display: block;
/* #endif */
justify-content: center;
@include flex;
flex-wrap: wrap;
align-items: center;
}
</style>