<template> 
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    <view class="u-swipe-action"> 
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        <slot></slot> 
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    </view> 
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</template> 
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<script> 
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    import props from './props.js'; 
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    /** 
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     * SwipeAction 滑动单元格  
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     * @description 该组件一般用于左滑唤出操作菜单的场景,用的最多的是左滑删除操作 
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     * @tutorial https://www.uviewui.com/components/swipeAction.html 
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     * @property {Boolean}    autoClose    是否自动关闭其他swipe按钮组 
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     * @event {Function(index)}    click    点击组件时触发 
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     * @example    <u-swipe-action><u-swipe-action-item :rightOptions="options1" ></u-swipe-action-item></u-swipe-action> 
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     */ 
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    export default { 
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        name: 'u-swipe-action', 
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        mixins: [uni.$u.mpMixin, uni.$u.mixin, props], 
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        data() { 
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            return {} 
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        }, 
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        provide() { 
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            return { 
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                swipeAction: this 
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            } 
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        }, 
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        computed: { 
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            // 这里computed的变量,都是子组件u-swipe-action-item需要用到的,由于头条小程序的兼容性差异,子组件无法实时监听父组件参数的变化 
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            // 所以需要手动通知子组件,这里返回一个parentData变量,供watch监听,在其中去通知每一个子组件重新从父组件(u-swipe-action-item) 
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            // 拉取父组件新的变化后的参数 
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            parentData() { 
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                return [this.autoClose] 
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            } 
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        }, 
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        watch: { 
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            // 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 
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            parentData() { 
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                if (this.children.length) { 
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                    this.children.map(child => { 
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                        // 判断子组件(u-swipe-action-item)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) 
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                        typeof(child.updateParentData) === 'function' && child.updateParentData() 
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                    }) 
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                } 
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            }, 
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        }, 
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        created() { 
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            this.children = [] 
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        }, 
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        methods: { 
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            closeOther(child) { 
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                if (this.autoClose) { 
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                    // 历遍所有的单元格,找出非当前操作中的单元格,进行关闭 
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                    this.children.map((item, index) => { 
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                        if (child !== item) { 
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                            item.closeHandler() 
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                        } 
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                    }) 
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                } 
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            } 
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        } 
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    } 
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</script> 
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<style lang="scss" scoped> 
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</style> 
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