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[Demo][Component] Update: Implement Sprite panel spacing #3272

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[Demo][Component] Update: Implement Sprite panel spacing #3272

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280af2d
Update: Implement Sprite panel spacing
jiaxinLiu1 Jun 15, 2026
eb4c449
Fix EditorList drag spacing and restore lockfile metadata
jiaxinLiu1 Jun 15, 2026
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15 changes: 6 additions & 9 deletions spx-gui/src/components/editor/common/EditorList.vue
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@
<div
ref="itemsWrapper"
v-radar="listRadarInfo"
class="items mx-1.5 flex-[1_1_0] flex flex-col gap-2 overflow-y-auto"
class="items mx-0.5 flex-[1_1_0] flex flex-col gap-2 overflow-y-auto"
>
<slot></slot>
</div>
Expand Down Expand Up @@ -84,18 +84,15 @@ useDragSortable(sortableList, itemsWrapper, {

<style scoped>
.items {
/* Here we keep the horizontal padding no more than `10px`, */
/* as SortableJS uses `10` as `spacer` when deciding whether to put dragging item to the end of the list. */
/* Padding no more than `10px` disables the `_ghostIsLast` check. */
/* See details in https://github.com/SortableJS/Sortable/blob/ddd059717333d07b5b1125b7e1dc89514734bcf0/src/Sortable.js#L1822 */
/* Keep horizontal padding within the SortableJS drag-end threshold. */
/* The extra 2px visual spacing comes from the wrapper margin above. */
padding: 12px 10px;
}

.items:deep(.sortable-ghost-item) {
/* Shadow-like effect */
/* TODO: Use other tools like svg-filter to achieve shadow-like effect, to avoid coupling here with `UIBlockItem` */
border-color: var(--ui-color-grey-400) !important;
background-color: var(--ui-color-grey-400) !important;
opacity: 0.6;
filter: grayscale(1);

@fennoai fennoai Bot Jun 15, 2026

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[关键] 移除了 SortableJS 10px 水平内边距约束的说明注释

原注释记录了一个重要约束：SortableJS 使用 10 作为 spacer 阈值来决定是否触发 _ghostIsLast（将拖拽元素追加到列表末尾），因此水平 padding 须保持在 10px 以内。本 PR 删除了该注释，同时将水平 padding 从 10px 增大到 12px——恰好超过了注释中警告的临界值。

该注释的原始措辞在技术细节上可能并不完全精确（SortableJS 的 spacer 实际上与子元素的 bounding rect 比较，而非容器 padding 边缘），但它记录了一次真实的排查过程，并附有指向 SortableJS 源码的具体链接。删除注释的同时又做了注释所警告的那个改动，且未提供任何验证说明，会给后续维护者带来困惑。

建议：在合并前验证 12px 水平 padding 下拖拽到列表末尾的行为是否正常（尤其是 ghost 元素是否会意外跳到最后一位）。无论结果如何，请补充一条注释说明已验证该行为，或解释为何原有约束不再适用。

box-shadow: var(--ui-box-shadow-sm);
}

@fennoai fennoai Bot Jun 15, 2026

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[性能] filter: grayscale(1) 在拖拽过程中会触发昂贵的重绘

filter CSS 属性会强制浏览器将元素提升到独立合成层，并在每一帧对该元素及其所有子元素执行像素级颜色变换。在拖拽交互期间，ghost 元素每次移动都会触发一次完整的光栅化过程，在低性能设备或列表项包含图片缩略图（如 Sprite Costumes/Animations）时，可能导致拖拽卡帧。

相比之下，opacity: 0.6（本次变更已包含）在合成器层面处理，成本极低，能够实现相似的「淡化」视觉效果，而不需要 grayscale 滤镜带来的额外开销。

建议：考虑仅使用 opacity: 0.6 实现 ghost 元素的视觉降级效果，移除 filter: grayscale(1) 以避免拖拽帧率下降。如果保留灰度效果，请在目标设备上测试拖拽流畅度。

.items:deep(.sortable-ghost-item *) {
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