今天分享一个vue项目中在不同列表拖拽设置选项的功能,这个功能也是在做项目中遇到的,先说下这个功能的要点(参考下图),有2个列表,左侧列表展示已选,右侧列表展示未选,通过拖拽进行设置,已选的选项不能超过4个,超过的话自动将拖拽之前的最后一项清除到右侧,且如果从已选往未选里拖的时候,右侧显示垃圾桶的提示(如图)。
拖拽功能图片:
垃圾桶显示图:
首先讲讲vue-draggable的使用
安装vue-draggable:
npm install vuedraggable
在使用插件的组件内引入vue-draggable并注册组件:
1 2 3 4 5 | import draggable from "vuedraggable" components: { draggable } |
然后在我们需要拖拽的列表中使用:
1 2 3 4 5 6 7 8 9 10 11 | <draggable class = "selected-list" tag= "ul" v-model= "selectedTheme" v-bind= "dragOptions" :move= "onMove" @end= "onEnd" > <li class = "selected-theme" v- for = "item in selectedTheme" :key= "item.type" >{{item.name}}</li> </draggable> |
下面是拖拽功能组件的完整代码:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 | <template> <div class = "theme-setting" > <el-dialog title= "设置选项" :visible.sync= "dialogVisible" width= "648px" :close-on-click-modal= "false" > <div class = "theme-left" > <dl class = "theme-title" > <dt class = "title" >当前选项</dt> <dd class = "des" >从右侧拖拽添加</dd> </dl> <draggable class = "selected-list" tag= "ul" v-model= "selectedTheme" v-bind= "dragOptions" :move= "onMove" @end= "onEnd" > <li class = "selected-theme" v- for = "item in selectedTheme" :key= "item.type" >{{item.name}}</li> </draggable> </div> <div class = "theme-right" > <h3 class = "theme-right-title" >全部选项</h3> <draggable class = "theme-right-list" tag= "ul" v-model= "unSelectTheme" v-bind= "dragOptions" :move= "onMove" @end= "onEnd" > <li class = "theme-right-item" v- for = "item in unSelectTheme" :key= "item.type" >{{item.name}}</li> </draggable> </div> <div class = "drag-drop-del" v-show= "isShowDel" > <img src= "../assets/imgs/drapDrop/drag_drop_del.png" alt= "" > </div> <span slot= "footer" class = "dialog-footer" > <el-button @click= "restoreDefault" >恢复默认设置</el-button> <el-button type= "primary" @click= "saveThemeSet" >保存</el-button> </span> </el-dialog> </div> </template> <script> import {Message} from 'element-ui' import draggable from "vuedraggable" export default { name: 'DragDrop' , components: { draggable }, data() { return { dialogVisible: false , selectedTheme: [{ type: 1, name: '选项1' }, { type: 2, name: '选项2' }, { type: 3, name: '选项3' }, { type: 4, name: '选项4' }], // 已选主题列表 unSelectTheme: [{ type: 5, name: '选项5' }, { type: 6, name: '选项6' }], // 未选主题列表 backSelectedTheme: [], // 选主题列表备份 backUnSelectTheme: [], // 未选主题列表备份用于恢复默认设置 relatedListLast: {}, // 已选主题列表最后一项 isShowDel: false } }, methods: { showDrag() { this .dialogVisible = true }, onMove({ relatedContext, draggedContext, to }) { const relatedElement = relatedContext.element const draggedElement = draggedContext.element let dragInEl = to[ 'className' ] if (dragInEl == 'selected-list' ) { this .isShowDel = false if ( this .selectedTheme.length === 4) { // 判断往已选列表拖时,如果已经满足4项,则记录已选列表的最后一项 // 拖拽结束时将此项清除到未选列表中 this .relatedListLast = this .selectedTheme[ this .selectedTheme.length-1] } } else { this .isShowDel = true // 判断如果是往未选列表里拖的话显示垃圾桶 } return ( (!relatedElement || !relatedElement.fixed) && !draggedElement.fixed ) }, onEnd(dragObj) { let dragInEl = dragObj.to[ 'className' ] if (dragInEl == 'selected-list' ) { if ( this .selectedTheme.length > 4) { // 判断已选列表大于4项,将记录的最后一项过滤出来,并push到未选列表数组 this .selectedTheme = this .selectedTheme.filter(item => { return item.type != this .relatedListLast.type }) this .unSelectTheme.push( this .relatedListLast) } } if (dragInEl === 'theme-right-list' ) { // 判断是往未选列表拖时,拖拽结束时将垃圾桶隐藏 this .isShowDel = false } }, // 保存设置 saveThemeSet() { const params = { taskTopicList: this .selectedTheme } if ( this .selectedTheme.length !== 4) { Message({ type: 'error' , message: '需设置4个选项 !' }) return false } $ajax.save(params).then(data => { this .dialogVisible = false Message({ type: 'success' , message: '保存成功!' }) this .$parent.refresh() }). catch (err => { console.log(err) }) }, // 恢复默认设置 restoreDefault() { this .selectedTheme = this .backSelectedTheme this .unSelectTheme = this .backUnSelectTheme } }, computed: { dragOptions() { return { animation: 0, group: "description" , disabled: false , ghostClass: "ghost" } } } }; </script> <style lang= "less" scoped> body, ul, dl, dt, dd, li, h1, h3{ margin: 0; padding: 0; } ul, ol, li { list-style: none; } .theme-setting { /deep/.el-dialog { height: 476px; border-radius: 6px; .el-dialog__header { height: 55px; line-height: 56px; padding: 0; border-bottom: 1px solid rgba(13,20,30, 0.1); .el-dialog__title { height:21px; font-size:16px; font-family:MicrosoftYaHei-Bold,MicrosoftYaHei; font-weight:bold; color:rgba(13,20,30,1); line-height:21px; } .el-dialog__headerbtn { margin-top: -4px; } } .el-dialog__body { position: relative; display: flex; height: 331px; padding: 0; border-bottom: 1px solid rgba(13,20,30, 0.1); .theme-left { width: 218px; margin-left: 24px; border-right: 1px solid rgba(13,20,30, 0.1); .theme-title { display: flex; margin-top: 24px; .title { height:19px; margin-right: 4px; font-size:14px; font-family:MicrosoftYaHei-Bold,MicrosoftYaHei; font-weight:bold; color:rgba(13,20,30,1); line-height:19px; } .des { height:16px; font-size:12px; font-family:MicrosoftYaHei; color:rgba(13,20,30,0.6); line-height:19px; } } .selected-list { height: 240px; margin-top: 24px; overflow: hidden; .selected-theme { width:160px; height:48px; line-height:48px; text-align: center; margin-bottom: 16px; cursor: pointer; background:linear-gradient(180deg,rgba(43,46,83,1) 0%,rgba(108,116,150,1) 100%); border-radius:6px; font-size:14px; font-family:MicrosoftYaHei; color:rgba(255,255,255,1); } } } .theme-right { padding: 0 24px; .theme-right-title { padding-top: 24px; height:19px; font-size:14px; font-family:MicrosoftYaHei-Bold,MicrosoftYaHei; font-weight:bold; color:rgba(13,20,30,0.4); line-height:19px; } .theme-right-list { width: 357px; height: 240px; overflow: scroll; margin-top: 24px; .theme-right-item { width: 160px; height:48px; line-height:48px; float : left; margin-right: 16px; margin-bottom: 16px; background:rgba(247,248,252,1); border-radius:6px; font-size:14px; font-family:MicrosoftYaHei; color:rgba(13,20,30,0.4); text-align: center; cursor: pointer; } } .theme-right-list::before, .theme-right-list::after { content: "" ; display: table; } .theme-right-list::after { clear: both; } } .drag-drop-del { position: absolute; right: 1px; top: 0; width: 404px; height: 331px; display: flex; justify-content: center; align-items: center; background-image: url( '../../src/assets/imgs/drapDrop/drag_drop.png' ); img { width: 96px; height: 96px; } } } .el-dialog__footer { height: 88px; padding: 24px 24px 0; .dialog-footer { .el-button+.el-button { margin-left: 16px; } } } } } </style> |
总结
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