fix: optimize drag performance while selecting multiple nodes #4201
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## master #4201 +/- ##
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- Coverage 10.36% 10.35% -0.01%
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Files 180 180
Lines 10563 10572 +9
Branches 2572 2574 +2
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Hits 1095 1095
- Misses 9379 9388 +9
Partials 89 89
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xiawenqi
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egde 的事件忘了？ |
NewByVector
requested changes
Apr 28, 2024
| @@ -83,7 +83,8 @@ export class SelectionImpl extends View<SelectionImpl.EventArgs> { | |||
| collection.on('reseted', this.onReseted, this) | |||
| collection.on('updated', this.onCollectionUpdated, this) | |||
| collection.on('node:change:position', this.onNodePositionChanged, this) | |||
| collection.on('cell:changed', this.onCellChanged, this) | |||
| collection.on('node:change:angle', this.onCellChanged, this) | |||
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使用 cell:changed 确实会执行过于频繁。不过导致 box 修改的事件应该不止 angle/size 修改。
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Description
fix #1325
Motivation and Context
当利用框选插件选中多个节点时，拖拽性能下降非常严重。主要原因是插件监听了节点的change事件，当节点拖拽时多次触发重新创建节点，大量的DOM操作导致页面卡顿。
解决方式为不再在节点change时触发重新创建选框，改为分别监听节点的position、angle、size变更事件，position时只需要变更选框位置，angle和size变更时重绘选框DOM。
对比选中200节点时的拖拽效果, 优化前：
before.mp4
优化后：
after.mp4
Types of changes
Self Check before Merge