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v1.0.0-beta 源码正式开源
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小莫唐尼
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<template>
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<view class="tm-dragList ">
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<view :style="{height:h*list.length+'px',width:w+'px'}" class="relative"
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:class="[disabled?'opacity-7':'']">
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<view class="fulled-height overflow" :class="[bgColor,black_tmeme?'grey-darken-4 bk':'',
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'absolute',
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'tm-dragList-item','shadow-'+(nowMove_index==index?16:0),'flex-between']" v-for="(item,index) in listData"
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:key="index" :style="{
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transition: nowMove_index==index||endDrage?'all 0s':'all 0.25s',
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top: item.top+'px',
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height:h+'px',width:w+'px',zIndex:nowMove_index==index?5:0}">
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<view class=" flex-start fulled" :class="[black_tmeme?'border-grey-darken-5-b-1':'border-b-1']"
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:style="{height:(h-1)+'px'}"
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>
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<view v-if="item['icon']" class="flex-shrink pl-32 fulled-height flex-center">
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<tm-icons :black="black_tmeme" :color="item['color']||'black'" :fllowTheme="fllowTheme" dense
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:name="item['icon']" :size="40"></tm-icons>
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</view>
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<view class="pl-32 text-size-n" :class="[black_tmeme?'bk':'']">{{item.text}}</view>
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</view>
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<view
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:style="{height:(h-1)+'px',width: '100rpx'}"
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@touchstart="m_start($event,index)"
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@mousedown="m_start($event,index)"
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@touchmove.stop.prevent="m_move($event,index)"
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@mousemove.stop.prevent="m_move($event,index)"
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@touchend="m_end($event,index)"
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@mouseup="m_end($event,index)"
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class="flex-shrink flex-end " :class="[black_tmeme?'border-grey-darken-5-b-1':'border-b-1']">
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<text class="iconfont icon-menu pr-32 text-size-n"
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:class="[black_tmeme?' bk text-grey-darken-2':'text-grey']"></text>
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</view>
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</view>
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</view>
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</view>
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</template>
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<script>
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/**
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* 拖放排序
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* @property {String | Boolean} black = [true|false] 默认：null，是否开启暗黑模式
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* @property {String | Boolean} disabled = [true|false] 默认：false，是否禁用，禁用后无法操作。
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* @property {Number} width = [] 默认：0，组件的宽度，rpx,可不提供，默认为父组件的宽度。
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* @property {Number} height = [] 默认：120，列表项目的高度，rpx,
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* @property {String} bgColor = [] 默认：white，项目的背景色
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* @property {String} right-icon = [] 默认：''，项目右边可拖动的图标
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* @property {String} rang-key = [] 默认：'text'，列表项目读取文本的key
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* @property {String} list = [] 默认：[]，列表数据[{text: "菜单选项",icon: 'icon-menu',color:'red'}]
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* @param {Function} change 拖动排序后，触发，返回新的排序后list数据。
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*/
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import tmIcons from '@/tm-vuetify/components/tm-icons/tm-icons.vue';
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export default {
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name: "tm-dragList",
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components: {
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tmIcons
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},
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props: {
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disabled: {
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type: String | Boolean,
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default: false
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},
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// 跟随主题色的改变而改变。
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fllowTheme: {
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type: Boolean | String,
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default: true
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},
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// 是否开启暗黑模式
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black: {
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type: String | Boolean,
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default: null
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},
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width: {
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type: Number,
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default: 0
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},
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height: {
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type: Number,
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default: 120
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},
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list: {
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type: Array,
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default: () => {
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return []
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}
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},
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rangKey: {
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type: String,
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default: 'text'
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},
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rightIcon: {
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type: String,
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default: "icon-menu"
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},
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bgColor: {
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type: String,
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default: "white"
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},
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},
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destroyed() {
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clearTimeout(999)
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},
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watch: {
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list: {
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deep: true,
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handler() {
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this.jishunTopData();
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}
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}
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},
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data() {
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return {
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w: 0,
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h: 0,
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totalH: 0,
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y: 0,
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new_index: null, //即将被替换的索引（实质性被替换）
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nowMove_index: null, //现在正在移动的索引
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listData: [], //被处理过的数据。
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new_item: [], //虚拟列表，内部排列好，但未在页面中渲染。
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endDrage: false,
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Drage__id: '', //正在被拖动的id;
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h_top: 0,
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};
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},
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computed: {
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black_tmeme: function() {
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if (this.black !== null) return this.black;
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return this.$tm.vx.state().tmVuetify.black;
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},
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},
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async mounted() {
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let t = this;
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this.jishunTopData();
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},
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methods: {
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jishunTopData() {
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this.$nextTick(async function() {
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this.listData = [];
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let p = await this.$Querey(".tm-dragList", this).catch(e => {})
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this.w = uni.upx2px(this.width) || p[0].width;
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this.h = uni.upx2px(this.height)
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this.totalH = this.h * this.list.length
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let list = [];
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for (let i = 0; i < this.list.length; i++) {
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let p = this.list[i];
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p['top'] = i * this.h;
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p['i'] = i;
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p['__id'] = uni.$tm.guid();
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this.listData.push(p)
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}
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this.new_item = [...this.listData];
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})
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},
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m_start(event, index) {
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event.preventDefault()
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event.stopPropagation()
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if (this.disabled) return;
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this.nowMove_index = index;
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this.endDrage = false;
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this.new_item = [...this.listData];
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if (event.type.indexOf('mouse') == -1 && event.changedTouches.length == 1) {
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var touch = event.changedTouches[0];
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this.y = touch.pageY - event.currentTarget.offsetTop - this.listData[index].top
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} else {
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this.y = event.pageY - event.currentTarget.offsetTop - this.listData[index].top
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}
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// #ifdef MP
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uni.vibrateShort({})
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// #endif
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},
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m_move(event, index) {
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if (this.disabled) return;
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let t = this
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event.preventDefault()
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event.stopPropagation()
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if (t.nowMove_index == null) return;
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//当前元素的top位置。
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let ch = 0;
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if (event.type.indexOf('mouse') == -1 && event.changedTouches.length == 1) {
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var touch = event.changedTouches[0];
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ch = touch.pageY - t.y
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} else {
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ch = event.pageY - t.y
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}
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t.listData.splice(index, 1, {
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...t.listData[index],
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top: ch
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})
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const currenit_index = index;
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const currentSort = t.listData[currenit_index].i;
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const currenit_id = t.listData[currenit_index].__id;
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// 计算当前移动的index.
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let moveIndex = Math.round(ch / t.h);
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moveIndex = moveIndex < 0 ? 0 : moveIndex;
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moveIndex = moveIndex > t.listData.length - 1 ? t.listData.length - 1 : moveIndex;
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moveIndex = Math.abs(moveIndex)
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index = moveIndex;
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let elList = [...t.listData]
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for (let i = 0; i < elList.length; i++) {
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if (currentSort < moveIndex) {
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if (elList[i].i > currentSort && elList[i].i <= moveIndex) {
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elList[i].i -= 1;
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};
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} else if (currentSort > moveIndex) {
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if (elList[i].i < currentSort && elList[i].i >= moveIndex) {
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elList[i].i += 1;
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};
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}
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};
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elList[currenit_index].i = moveIndex;
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elList = elList.map(im => {
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if (im.__id != currenit_id) {
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im.top = im.i * t.h;
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}
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return im;
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})
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t.listData = elList;
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t.new_index = moveIndex;
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// #ifdef MP
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uni.vibrateShort({})
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// #endif
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},
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m_end(event, index) {
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if (this.disabled) return;
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let t = this;
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event.preventDefault()
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event.stopPropagation()
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this.nowMove_index = null;
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this.endDrage = true;
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if (this.new_index == null) return;
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let elList = t.listData
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elList = elList.map(im => {
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im.top = im.i * t.h;
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return im;
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})
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elList.sort((a,b)=>a.i-b.i)
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t.listData = [...elList]
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this.moveChange();
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},
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moveChange(e, index) {
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if (this.disabled) return;
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//change后修改的数据 。
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this.$emit('change', this.listData);
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}
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},
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}
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</script>
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<style lang="scss">
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</style>
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