tldraw/components/canvas/page.tsx
2021-06-05 20:36:46 +01:00

36 lines
1,008 B
TypeScript

import { useSelector } from 'state'
import { GroupShape } from 'types'
import { deepCompareArrays, getPage } from 'utils/utils'
import Shape from './shape'
/*
On each state change, compare node ids of all shapes
on the current page. Kind of expensive but only happens
here; and still cheaper than any other pattern I've found.
*/
const noOffset = [0, 0]
export default function Page() {
const currentPageShapeIds = useSelector(({ data }) => {
return Object.values(getPage(data).shapes)
.filter((shape) => shape.parentId === data.currentPageId)
.sort((a, b) => a.childIndex - b.childIndex)
.map((shape) => shape.id)
}, deepCompareArrays)
const isSelecting = useSelector((s) => s.isIn('selecting'))
return (
<g pointerEvents={isSelecting ? 'all' : 'none'}>
{currentPageShapeIds.map((shapeId) => (
<Shape
key={shapeId}
id={shapeId}
isSelecting={isSelecting}
parentPoint={noOffset}
/>
))}
</g>
)
}