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export {}; |
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import { VantComponent } from '../common/component'; | ||
var FieldName; | ||
(function (FieldName) { | ||
FieldName["TEXT"] = "text"; | ||
FieldName["VALUE"] = "value"; | ||
FieldName["CHILDREN"] = "children"; | ||
})(FieldName || (FieldName = {})); | ||
const defaultFieldNames = { | ||
text: FieldName.TEXT, | ||
value: FieldName.VALUE, | ||
children: FieldName.CHILDREN, | ||
}; | ||
VantComponent({ | ||
props: { | ||
title: String, | ||
value: { | ||
type: String, | ||
observer: 'updateValue', | ||
}, | ||
placeholder: { | ||
type: String, | ||
value: '请选择', | ||
}, | ||
activeColor: { | ||
type: String, | ||
value: '#1989fa', | ||
}, | ||
options: { | ||
type: Array, | ||
value: [], | ||
observer: 'updateOptions', | ||
}, | ||
swipeable: { | ||
type: Boolean, | ||
value: false, | ||
}, | ||
closeable: { | ||
type: Boolean, | ||
value: true, | ||
}, | ||
showHeader: { | ||
type: Boolean, | ||
value: true, | ||
}, | ||
closeIcon: { | ||
type: String, | ||
value: 'cross', | ||
}, | ||
fieldNames: { | ||
type: Object, | ||
value: defaultFieldNames, | ||
observer: 'updateFieldNames', | ||
}, | ||
}, | ||
data: { | ||
tabs: [], | ||
activeTab: 0, | ||
textKey: FieldName.TEXT, | ||
valueKey: FieldName.VALUE, | ||
childrenKey: FieldName.CHILDREN, | ||
}, | ||
created() { | ||
this.updateTabs(); | ||
}, | ||
methods: { | ||
updateOptions(val, oldVal) { | ||
const isAsync = !!(val.length && oldVal.length); | ||
this.updateTabs(isAsync); | ||
}, | ||
updateValue(val) { | ||
if (val !== undefined) { | ||
const values = this.data.tabs.map((tab) => tab.selected && tab.selected[this.data.valueKey]); | ||
if (values.indexOf(val) > -1) { | ||
return; | ||
} | ||
} | ||
this.updateTabs(); | ||
}, | ||
updateFieldNames() { | ||
const { text = 'text', value = 'value', children = 'children', } = this.data.fieldNames || defaultFieldNames; | ||
this.setData({ | ||
textKey: text, | ||
valueKey: value, | ||
childrenKey: children, | ||
}); | ||
}, | ||
getSelectedOptionsByValue(options, value) { | ||
for (let i = 0; i < options.length; i++) { | ||
const option = options[i]; | ||
if (option[this.data.valueKey] === value) { | ||
return [option]; | ||
} | ||
if (option[this.data.childrenKey]) { | ||
const selectedOptions = this.getSelectedOptionsByValue(option[this.data.childrenKey], value); | ||
if (selectedOptions) { | ||
return [option, ...selectedOptions]; | ||
} | ||
} | ||
} | ||
}, | ||
updateTabs(isAsync = false) { | ||
const { options, value } = this.data; | ||
if (value !== undefined) { | ||
const selectedOptions = this.getSelectedOptionsByValue(options, value); | ||
if (selectedOptions) { | ||
let optionsCursor = options; | ||
const tabs = selectedOptions.map((option) => { | ||
const tab = { | ||
options: optionsCursor, | ||
selected: option, | ||
}; | ||
const next = optionsCursor.find((item) => item[this.data.valueKey] === option[this.data.valueKey]); | ||
if (next) { | ||
optionsCursor = next[this.data.childrenKey]; | ||
} | ||
return tab; | ||
}); | ||
if (optionsCursor) { | ||
tabs.push({ | ||
options: optionsCursor, | ||
selected: null, | ||
}); | ||
} | ||
this.setData({ | ||
tabs, | ||
}); | ||
wx.nextTick(() => { | ||
this.setData({ | ||
activeTab: tabs.length - 1, | ||
}); | ||
}); | ||
return; | ||
} | ||
} | ||
// 异步更新 | ||
if (isAsync) { | ||
const { tabs } = this.data; | ||
tabs[tabs.length - 1].options = | ||
options[options.length - 1][this.data.childrenKey]; | ||
this.setData({ | ||
tabs, | ||
}); | ||
return; | ||
} | ||
this.setData({ | ||
tabs: [ | ||
{ | ||
options, | ||
selected: null, | ||
}, | ||
], | ||
}); | ||
}, | ||
onClose() { | ||
this.$emit('close'); | ||
}, | ||
onClickTab(e) { | ||
const { index: tabIndex, title } = e.detail; | ||
this.$emit('click-tab', { title, tabIndex }); | ||
}, | ||
// 选中 | ||
onSelect(e) { | ||
const { option, tabIndex } = e.currentTarget.dataset; | ||
if (option && option.disabled) { | ||
return; | ||
} | ||
const { valueKey, childrenKey } = this.data; | ||
let { tabs } = this.data; | ||
tabs[tabIndex].selected = option; | ||
if (tabs.length > tabIndex + 1) { | ||
tabs = tabs.slice(0, tabIndex + 1); | ||
} | ||
if (option[childrenKey]) { | ||
const nextTab = { | ||
options: option[childrenKey], | ||
selected: null, | ||
}; | ||
if (tabs[tabIndex + 1]) { | ||
tabs[tabIndex + 1] = nextTab; | ||
} | ||
else { | ||
tabs.push(nextTab); | ||
} | ||
wx.nextTick(() => { | ||
this.setData({ | ||
activeTab: tabIndex + 1, | ||
}); | ||
}); | ||
} | ||
this.setData({ | ||
tabs, | ||
}); | ||
const selectedOptions = tabs.map((tab) => tab.selected).filter(Boolean); | ||
const params = { | ||
value: option[valueKey], | ||
tabIndex, | ||
selectedOptions, | ||
}; | ||
this.$emit('change', params); | ||
if (!option[childrenKey]) { | ||
this.$emit('finish', params); | ||
} | ||
}, | ||
}, | ||
}); |
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{ | ||
"component": true, | ||
"usingComponents": { | ||
"van-icon": "../icon/index", | ||
"van-tab": "../tab/index", | ||
"van-tabs": "../tabs/index" | ||
} | ||
} |
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<wxs src="./index.wxs" module="utils" /> | ||
|
||
<view wx:if="{{ showHeader }}" class="van-cascader__header"> | ||
<text class="van-cascader__title"><slot name="title"></slot>{{ title }}</text> | ||
<van-icon | ||
wx:if="{{ closeable }}" | ||
name="{{ closeIcon }}" | ||
class="van-cascader__close-icon" | ||
bind:tap="onClose" | ||
/> | ||
</view> | ||
|
||
<van-tabs | ||
active="{{ activeTab }}" | ||
custom-class="van-cascader__tabs" | ||
wrap-class="van-cascader__tabs-wrap" | ||
tab-class="van-cascader__tab" | ||
color="{{ activeColor }}" | ||
border="{{ false }}" | ||
swipeable="{{ swipeable }}" | ||
bind:click="onClickTab" | ||
> | ||
<van-tab | ||
wx:for="{{ tabs }}" | ||
wx:for-item="tab" | ||
wx:for-index="tabIndex" | ||
wx:key="tabIndex" | ||
title="{{ tab.selected ? tab.selected[textKey] : placeholder }}" | ||
style="width: 100%;" | ||
title-style="{{ !tab.selected ? 'color: #969799;font-weight:normal;' : '' }}" | ||
> | ||
<!-- 暂不支持 --> | ||
<!-- <slot name="options-top"></slot> --> | ||
|
||
<view class="van-cascader__options"> | ||
<view | ||
wx:for="{{ tab.options }}" | ||
wx:for-item="option" | ||
wx:key="index" | ||
class="{{ option.className }} {{ utils.optionClass(tab, textKey, option) }}" | ||
style="{{ utils.optionStyle({ tab, textKey, option, activeColor }) }}" | ||
data-option="{{ option }}" | ||
data-tab-index="{{ tabIndex }}" | ||
bind:tap="onSelect" | ||
> | ||
<text>{{ option[textKey] }}</text> | ||
<van-icon wx:if="{{ utils.isSelected(tab, textKey, option) }}" name="success" size="18" /> | ||
</view> | ||
</view> | ||
<!-- 暂不支持 --> | ||
<!-- <slot name="options-bottom"></slot> --> | ||
</van-tab> | ||
</van-tabs> |
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var utils = require('../wxs/utils.wxs'); | ||
var style = require('../wxs/style.wxs'); | ||
|
||
function isSelected(tab, textKey, option) { | ||
return tab.selected && tab.selected[textKey] === option[textKey] | ||
} | ||
|
||
function optionClass(tab, textKey, option) { | ||
return utils.bem('cascader__option', { selected: isSelected({ tab, textKey, option }), disabled: option.disabled }) | ||
} | ||
|
||
function optionStyle(data) { | ||
var color = data.option.color || (isSelected(data.tab, data.textKey, data.option) ? data.activeColor : undefined); | ||
return style({ | ||
color | ||
}); | ||
} | ||
|
||
|
||
module.exports = { | ||
isSelected: isSelected, | ||
optionClass: optionClass, | ||
optionStyle: optionStyle, | ||
}; |
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@import '../common/index.wxss';.van-cascader__header{align-items:center;display:flex;height:48px;justify-content:space-between;padding:0 16px}.van-cascader__title{font-size:16px;font-weight:600;line-height:20px}.van-cascader__close-icon{color:#c8c9cc;font-size:22px;height:22px}.van-cascader__tabs-wrap{height:48px!important;padding:0 8px}.van-cascader__tab{color:#323233!important;flex:none!important;font-weight:600!important;padding:0 8px!important}.van-cascader__tab--unselected{color:#969799!important;font-weight:400!important}.van-cascader__option{align-items:center;cursor:pointer;display:flex;font-size:14px;justify-content:space-between;line-height:20px;padding:10px 16px}.van-cascader__option:active{background-color:#f2f3f5}.van-cascader__option--selected{color:#1989fa;font-weight:600}.van-cascader__option--disabled{color:#c8c9cc;cursor:not-allowed}.van-cascader__option--disabled:active{background-color:initial}.van-cascader__options{-webkit-overflow-scrolling:touch;box-sizing:border-box;height:384px;overflow-y:auto;padding-top:6px} |
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export {}; |
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