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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 | 7x 7x | <template> <div :class="$style.root"> <slot></slot> </div> </template> <script> import { MParent } from '../m-parent.vue'; import { addResizeListener, removeResizeListener } from '../../utils/dom'; export default { name: 'u-split-layout', childName: 'u-split-layout-item', mixins: [MParent], props: { direction: { default: 'horizontal', validator: (value) => ['horizontal', 'vertical'].includes(value), }, minSize: { type: Number, default: 100 }, resizable: { type: Boolean, default: false }, resizeRemaining: { type: String, default: 'sequence' }, }, watch: { itemVMs() { this.handleResize(); }, }, mounted() { this.handleResize(); addResizeListener(this.$el, this.handleResize); }, destroyed() { removeResizeListener(this.$el, this.handleResize); }, methods: { /** * 处理大小 * 与表格组件的计算类似 */ handleResize() { let rootSize; if (this.direction === 'horizontal') { rootSize = this.$el.clientWidth; if (!rootSize) { // 初始表格隐藏时,上面的值为0,需要特殊处理 let parentEl = this.$el && this.$el.parentElement; while (parentEl && !parentEl.clientWidth) parentEl = parentEl.parentElement; rootSize = parentEl ? parentEl.clientWidth : 0; } } else { rootSize = this.$el.clientHeight; if (!rootSize) { // 初始表格隐藏时,上面的值为0,需要特殊处理 let parentEl = this.$el && this.$el.parentElement; while (parentEl && !parentEl.clientHeight) parentEl = parentEl.parentElement; rootSize = parentEl ? parentEl.clientHeight : 0; } } // 分别获取有百分比、具体数值和无 size 的列 const percentItemVMs = []; const valueItemVMs = []; const noSizeItemVMs = []; // 统计固定列的数量 this.itemVMs.forEach((itemVM) => { if (!itemVM.currentSize) noSizeItemVMs.push(itemVM); else if (String(itemVM.currentSize).endsWith('%')) percentItemVMs.push(itemVM); else valueItemVMs.push(itemVM); }); // 全部都是百分数的情况,按比例缩小 if (percentItemVMs.length === this.itemVMs.length) { const sumSize = percentItemVMs.reduce((prev, itemVM) => prev + parseFloat(itemVM.currentSize), 0); if (sumSize !== 100) { percentItemVMs.forEach((itemVM) => { itemVM.currentSize = (parseFloat(itemVM.currentSize) / sumSize) * 100 + '%'; }); } } const percentSizeSum = percentItemVMs.reduce((prev, itemVM) => { itemVM.computedSize = (parseFloat(itemVM.currentSize) * rootSize) / 100; return prev + itemVM.computedSize; }, 0); // 全部都是数值的情况,按实际大小 const valueSizeSum = valueItemVMs.reduce((prev, itemVM) => { itemVM.computedSize = parseFloat(itemVM.currentSize); return prev + itemVM.computedSize; }, 0); const remainingSize = rootSize - percentSizeSum - valueSizeSum; if (remainingSize > 0 && noSizeItemVMs.length) { const averageSize = remainingSize / noSizeItemVMs.length; noSizeItemVMs.forEach((itemVM) => itemVM.computedSize = averageSize); } else if (remainingSize > 0 && valueSizeSum !== 0) { const averageSize = remainingSize / valueItemVMs.length; valueItemVMs.forEach((itemVM) => itemVM.computedSize = itemVM.computedSize + averageSize); } // 如果所有列均有值,则总宽度有超出的可能。否则总宽度为根节点的宽度。 let finalSize = ''; if (this.itemVMs.every((itemVM) => itemVM.computedSize)) { this.itemVMs.forEach((itemVM) => { itemVM.computedSize = Math.max(itemVM.computedSize, itemVM.minSize || this.minSize); }); finalSize = this.itemVMs.reduce((prev, itemVM) => { if (String(itemVM.currentSize).endsWith('%')) { return (prev + (parseFloat(itemVM.currentSize) * rootSize) / 100); } else return prev + itemVM.computedSize; }, 0); const diffSize = finalSize - rootSize; if (Math.abs(diffSize) > 1) { let fixedSize = 0; let adjustableItems = [] let hasValueSize = 0; const hasValueItems = []; this.itemVMs.forEach((itemVM) => { const minSize = itemVM.minSize || this.minSize if(diffSize > 0 && itemVM.computedSize === minSize) { // 如果已经是最小值,不能再缩小 fixedSize += minSize; } else if(itemVM.currentSize) { // 已经设过值的模块理论上不改变大小,如果没有地方能变,再来改这部分的大小 hasValueSize += minSize; hasValueItems.push(itemVM); } else { adjustableItems.push(itemVM); } }); // 如果大家都不能调整,则整体都按相同比例调整 if(!adjustableItems.length) { // 没有可以调整的区域 if(!!hasValueItems.length) { hasValueSize = 0; adjustableItems = [...hasValueItems]; } else { adjustableItems = [...this.itemVMs]; } } adjustableItems.forEach((itemVM) => itemVM.computedSize = itemVM.computedSize * (rootSize - fixedSize - hasValueSize) / (finalSize - fixedSize - hasValueSize)); } this.itemVMs.forEach((itemVM) => { if(!!itemVM.currentSize) { itemVM.currentSize = itemVM.computedSize; } }) } setTimeout(() => this.$emit('resize', {}, this)); }, onResizerDragStart($event, itemVM) { this.itemVMs.forEach((itemVM) => { itemVM.oldSize = itemVM.computedSize; }); this.$emit('drag-start', $event, this); }, onResizerDrag($event, itemVM) { const index = this.itemVMs.indexOf(itemVM); const rootSize = this.direction === 'horizontal' ? this.$el.clientWidth : this.$el.clientHeight; // 当前元素之前的元素所占的空间大小 let beforeSize = 0; for (let i = 0; i < index; i++) beforeSize += this.itemVMs[i].computedSize; // 可以调整的最大大小 let maxSize = rootSize - beforeSize; for(let i=index+1;i<this.itemVMs.length;i++) { maxSize -= this.itemVMs[i].minSize || this.minSize; } const size = Math.max( itemVM.minSize || this.minSize, Math.min( itemVM.oldSize + (this.direction === 'horizontal' ? $event.dragX : $event.dragY), maxSize ) ); let remainingSize = size - itemVM.computedSize; itemVM.computedSize = size; if (this.resizeRemaining === 'sequence') { for (let i = index + 1; i < this.itemVMs.length; i++) { if (remainingSize === 0) break; const itemVM = this.itemVMs[i]; const minSize = itemVM.minSize || this.minSize; if (itemVM.computedSize - remainingSize >= minSize) { itemVM.computedSize -= remainingSize; remainingSize = 0; } else { remainingSize -= itemVM.computedSize - minSize; itemVM.computedSize = minSize; } } } else if (this.resizeRemaining === 'average') { /* eslint-disable no-inner-declarations */ function distributeInAverage(itemVMs) { const averageSize = remainingSize / itemVMs.length; const wideitemVMs = []; itemVMs.forEach((itemVM) => { const minSize = itemVM.minSize || this.minSize; if (itemVM.computedSize - averageSize >= minSize) { itemVM.computedSize -= averageSize; remainingSize -= averageSize; wideitemVMs.push(itemVM); } else { remainingSize -= itemVM.computedSize - minSize; itemVM.computedSize = minSize; } }); if (Math.abs(remainingSize) >= 1 && wideitemVMs.length) distributeInAverage(wideitemVMs); } distributeInAverage(this.itemVMs.slice(index + 1)); itemVM.computedSize -= remainingSize; } $event.transferEl.style.left = ''; $event.transferEl.style.top = ''; if(!!itemVM.currentSize) { itemVM.currentSize = itemVM.computedSize; } this.$emit('drag', $event, this); }, onResizerDragEnd($event, itemVM) { const index = this.itemVMs.indexOf(itemVM); this.$emit('resize', { itemVM, index, size: itemVM.computedSize, oldSize: itemVM.oldSize, }, this); this.$emit('drag-end', $event, this); }, }, }; </script> <style module> .root { position: relative; width: 100%; height: 100%; overflow: hidden; } .root::before, .root::after { display: block; content: '.'; clear: both; height: 0; visibility: hidden; } </style> |