tldraw/components/canvas/canvas.tsx
2021-05-28 17:25:43 +01:00

71 lines
1.8 KiB
TypeScript

import styled from 'styles'
import state, { useSelector } from 'state'
import inputs from 'state/inputs'
import React, { useCallback, useRef } from 'react'
import useZoomEvents from 'hooks/useZoomEvents'
import useCamera from 'hooks/useCamera'
import Defs from './defs'
import Page from './page'
import Brush from './brush'
import Bounds from './bounds/bounding-box'
import BoundsBg from './bounds/bounds-bg'
import Selected from './selected'
export default function Canvas() {
const rCanvas = useRef<SVGSVGElement>(null)
const rGroup = useRef<SVGGElement>(null)
const events = useZoomEvents(rCanvas)
useCamera(rGroup)
const isReady = useSelector((s) => s.isIn('ready'))
const handlePointerDown = useCallback((e: React.PointerEvent) => {
rCanvas.current.setPointerCapture(e.pointerId)
state.send('POINTED_CANVAS', inputs.pointerDown(e, 'canvas'))
}, [])
const handlePointerMove = useCallback((e: React.PointerEvent) => {
state.send('MOVED_POINTER', inputs.pointerMove(e))
}, [])
const handlePointerUp = useCallback((e: React.PointerEvent) => {
rCanvas.current.releasePointerCapture(e.pointerId)
state.send('STOPPED_POINTING', { id: 'canvas', ...inputs.pointerUp(e) })
}, [])
return (
<MainSVG
ref={rCanvas}
{...events}
onPointerDown={handlePointerDown}
onPointerMove={handlePointerMove}
onPointerUp={handlePointerUp}
>
<Defs />
{isReady && (
<g ref={rGroup}>
<BoundsBg />
<Page />
<Bounds />
<Selected />
<Brush />
</g>
)}
</MainSVG>
)
}
const MainSVG = styled('svg', {
position: 'fixed',
top: 0,
left: 0,
width: '100%',
height: '100%',
touchAction: 'none',
zIndex: 100,
'& *': {
userSelect: 'none',
},
})