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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,288 @@ | ||
| import { useRef, useState, useEffect } from 'react' | ||
| import styled from 'styled-components' | ||
| import { useStateDesigner } from '@state-designer/react' | ||
|
|
||
| const PADDING = 32 | ||
|
|
||
| export default function Bezier({ | ||
| label, | ||
| value, | ||
| onChange, | ||
| }: { | ||
| label: string | ||
| value: number[] | ||
| onChange: (v: number[]) => void | ||
| }) { | ||
| function handleChange(v: number, i: number) { | ||
| let next = [...value] | ||
| next[i] = v | ||
| onChange(next) | ||
| } | ||
|
|
||
| const state = useStateDesigner({ | ||
| data: { | ||
| value, | ||
| draggingKnob: 1, | ||
| pointer: { | ||
| x: 0, | ||
| y: 0, | ||
| }, | ||
| }, | ||
| on: { | ||
| UPDATED_VALUE_FROM_PROPS: 'setValue', | ||
| MOVED_POINTER: { secretlyDo: 'updatePointer' }, | ||
| }, | ||
| initial: 'idle', | ||
| states: { | ||
| idle: { | ||
| on: { | ||
| CLICKED_BACKGROUND: { | ||
| to: 'draggingKnob', | ||
| }, | ||
| STARTED_DRAGGING_KNOB: { | ||
| do: 'setDraggingKnob', | ||
| to: 'draggingKnob', | ||
| }, | ||
| RESET_KNOB: { | ||
| do: ['setDraggingKnob', 'resetDraggingKnob', 'shareValue'], | ||
| }, | ||
| }, | ||
| }, | ||
| draggingKnob: { | ||
| onEnter: ['updateDraggingKnob', 'shareValue'], | ||
| on: { | ||
| MOVED_POINTER: { | ||
| do: ['updateDraggingKnob', 'shareValue'], | ||
| }, | ||
| STOPPED_DRAGGING: { | ||
| to: 'idle', | ||
| }, | ||
| }, | ||
| }, | ||
| }, | ||
| actions: { | ||
| setDraggingKnob(data, payload: number) { | ||
| data.draggingKnob = payload | ||
| }, | ||
| updateDraggingKnob(data) { | ||
| const { | ||
| value, | ||
| draggingKnob, | ||
| pointer: { x, y }, | ||
| } = data | ||
| if (draggingKnob === 0 || draggingKnob === 3) { | ||
| value[draggingKnob * 2 + 1] = Math.max(Math.min(y, 1), 0) | ||
| } else { | ||
| value[draggingKnob * 2] = x | ||
| value[draggingKnob * 2 + 1] = y | ||
| } | ||
| }, | ||
| resetDraggingKnob(data) { | ||
| data.value[data.draggingKnob * 2] = 0 | ||
| data.value[data.draggingKnob * 2 + 1] = 0 | ||
| }, | ||
| updatePointer(data, payload: { x: number; y: number }) { | ||
| data.pointer = payload | ||
| }, | ||
| setValue(data, payload: number[]) { | ||
| data.value = payload | ||
| }, | ||
| shareValue(data) { | ||
| onChange([...data.value]) | ||
| }, | ||
| }, | ||
| }) | ||
|
|
||
| const rContainer = useRef<HTMLDivElement>(null) | ||
| const [rect, setRect] = useState([0, 0, 200, 128]) | ||
|
|
||
| useEffect(() => { | ||
| state.send('UPDATED_VALUE_FROM_PROPS', value) | ||
|
|
||
| const elm = rContainer.current! | ||
| const rect = elm.getBoundingClientRect() | ||
| setRect([rect.x, rect.y, rect.width, rect.height]) | ||
| }, [value]) | ||
|
|
||
| const [x0, y0, x1, y1, x2, y2, x3, y3] = state.data.value | ||
|
|
||
| const w = rect[2] - PADDING * 2 | ||
| const h = rect[3] - PADDING * 2 | ||
|
|
||
| const cx0 = PADDING + x0 * w | ||
| const cy0 = PADDING + (1 - y0) * h | ||
|
|
||
| const cx1 = PADDING + x1 * w | ||
| const cy1 = PADDING + (1 - y1) * h | ||
|
|
||
| const cx2 = PADDING + x2 * w | ||
| const cy2 = PADDING + (1 - y2) * h | ||
|
|
||
| const cx3 = PADDING + x3 * w | ||
| const cy3 = PADDING + (1 - y3) * h | ||
|
|
||
| const path = `M ${cx0},${cy0} C ${cx1},${cy1} ${cx2},${cy2} ${cx3},${cy3}` | ||
|
|
||
| return ( | ||
| <> | ||
| <label>{label}</label> | ||
| <Container ref={rContainer}> | ||
| <svg | ||
| width={rect[2]} | ||
| height={rect[3]} | ||
| viewBox={`0 0 ${rect[2]} ${rect[3]}`} | ||
| onPointerMove={({ pageX, pageY }) => { | ||
| state.send('MOVED_POINTER', { | ||
| x: (pageX - PADDING - rect[0]) / w, | ||
| y: 1 - (pageY - PADDING - rect[1]) / h, | ||
| }) | ||
| }} | ||
| onPointerUp={() => state.send('STOPPED_DRAGGING')} | ||
| > | ||
| <rect | ||
| x={PADDING} | ||
| y={PADDING} | ||
| width={w} | ||
| height={h} | ||
| fill="transparent" | ||
| stroke="rgba(144, 144, 144, .2)" | ||
| /> | ||
| <g opacity=".5"> | ||
| <text | ||
| x={PADDING} | ||
| y={'50%'} | ||
| textAnchor="left" | ||
| transform={`translate(-${PADDING * 1.7}, ${h * | ||
| 1.25}) rotate(-90)`} | ||
| > | ||
| Size | ||
| </text> | ||
| <text x={'50%'} y={rect[3] - PADDING / 2} textAnchor="middle"> | ||
| Pressure | ||
| </text> | ||
| </g> | ||
| <line x1={cx0} y1={cy0} x2={cx1} y2={cy1} /> | ||
| <line x1={cx2} y1={cy2} x2={cx3} y2={cy3} /> | ||
| <path opacity={0.5} d={path} strokeWidth={2} /> | ||
| <circle | ||
| cx={cx0} | ||
| cy={cy0} | ||
| r={8} | ||
| onPointerDown={() => state.send('STARTED_DRAGGING_KNOB', 0)} | ||
| onDoubleClick={() => state.send('RESET_KNOB', 0)} | ||
| /> | ||
| <circle | ||
| cx={cx1} | ||
| cy={cy1} | ||
| r={8} | ||
| onPointerDown={() => state.send('STARTED_DRAGGING_KNOB', 1)} | ||
| onDoubleClick={() => state.send('RESET_KNOB', 1)} | ||
| /> | ||
| <circle | ||
| cx={cx2} | ||
| cy={cy2} | ||
| r={8} | ||
| onPointerDown={() => state.send('STARTED_DRAGGING_KNOB', 2)} | ||
| onDoubleClick={() => state.send('RESET_KNOB', 2)} | ||
| /> | ||
| <circle | ||
| cx={cx3} | ||
| cy={cy3} | ||
| r={8} | ||
| onPointerDown={() => state.send('STARTED_DRAGGING_KNOB', 3)} | ||
| onDoubleClick={() => state.send('RESET_KNOB', 3)} | ||
| /> | ||
| </svg> | ||
| </Container> | ||
| <Values> | ||
| <input | ||
| type="number" | ||
| min={0} | ||
| max={1} | ||
| step={0.01} | ||
| value={y0} | ||
| onChange={e => handleChange(Number(e.currentTarget.value), 1)} | ||
| /> | ||
| <input | ||
| type="number" | ||
| min={0} | ||
| max={1} | ||
| step={0.01} | ||
| value={x1} | ||
| onChange={e => handleChange(Number(e.currentTarget.value), 2)} | ||
| /> | ||
| <input | ||
| type="number" | ||
| min={0} | ||
| max={1} | ||
| step={0.01} | ||
| value={y1} | ||
| onChange={e => handleChange(Number(e.currentTarget.value), 3)} | ||
| /> | ||
| <input | ||
| type="number" | ||
| min={0} | ||
| max={1} | ||
| step={0.01} | ||
| value={x2} | ||
| onChange={e => handleChange(Number(e.currentTarget.value), 4)} | ||
| /> | ||
| <input | ||
| type="number" | ||
| min={0} | ||
| max={1} | ||
| step={0.01} | ||
| value={y2} | ||
| onChange={e => handleChange(Number(e.currentTarget.value), 5)} | ||
| /> | ||
| <input | ||
| type="number" | ||
| min={0} | ||
| max={1} | ||
| step={0.01} | ||
| value={y3} | ||
| onChange={e => handleChange(Number(e.currentTarget.value), 7)} | ||
| /> | ||
| </Values> | ||
| </> | ||
| ) | ||
| } | ||
|
|
||
| const Container = styled.div` | ||
| height: 160px; | ||
| position: relative; | ||
| border-radius: 4px; | ||
| overflow: hidden; | ||
| border: 1px solid rgba(144, 144, 144, 0.5); | ||
| grid-column: span 2; | ||
| svg { | ||
| position: absolute; | ||
| width: 100%; | ||
| height: 100%; | ||
| background-color: var(--color-background); | ||
| user-select: none; | ||
| } | ||
| text, | ||
| circle { | ||
| fill: var(--color-text); | ||
| } | ||
| line, | ||
| path { | ||
| stroke-width: 2px; | ||
| stroke: var(--color-text); | ||
| fill: transparent; | ||
| } | ||
| ` | ||
|
|
||
| const Values = styled.div` | ||
| grid-column: 2 / span 2; | ||
| display: grid; | ||
| grid-template-columns: repeat(6, 1fr); | ||
| input { | ||
| width: 100%; | ||
| } | ||
| ` |
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