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import React, { useEffect, useState } from 'react';
type Props = {
setFunc: (newPoints: { p1: number[]; p2: number[] }) => void;
};
const ANIMATION_DURATION = 750;
// const ANIMATION_TIMING_FUNC = "cubic-bezier(.42,.97,.52,1.49)";
const ANIMATION_TIMING_FUNC = 'cubic-bezier(0.3, .2, .2, 1.4)';
const CONTAINER_WIDTH = 200;
const EDITOR_WIDTH = 100;
const OFFSET = (CONTAINER_WIDTH - EDITOR_WIDTH) / 2;
const CubicBezierEditor = ({ setFunc }: Props) => {
const [animating, setAnimating] = useState(false);
const [cPoints, setCPoints] = useState({ p1: [0.67, 0.2], p2: [0.37, 0.88] });
const [c1Down, setC1Down] = useState(false);
const [c2Down, setC2Down] = useState(false);
const roundToHundredth = (num: number) => {
return Math.round(num * 100) / 100;
};
useEffect(() => {
if (animating) {
setTimeout(() => {
setAnimating(false);
}, ANIMATION_DURATION * 2);
}
}, [animating]);
useEffect(() => {
if (!c1Down) return;
window.addEventListener('pointerup', () => {
setC1Down(false);
});
const handlePointerMove = (e: PointerEvent) => {
const newX = cPoints.p1[0] + e.movementX / EDITOR_WIDTH;
if (newX < 0 || newX > 1) {
return;
}
setCPoints(prev => ({
...prev,
p1: [roundToHundredth(prev.p1[0] + e.movementX / EDITOR_WIDTH), roundToHundredth(prev.p1[1] - e.movementY / EDITOR_WIDTH)],
}));
setFunc({
...cPoints,
p1: [roundToHundredth(cPoints.p1[0] + e.movementX / EDITOR_WIDTH), roundToHundredth(cPoints.p1[1] - e.movementY / EDITOR_WIDTH)],
});
};
window.addEventListener('pointermove', handlePointerMove);
return () => window.removeEventListener('pointermove', handlePointerMove);
}, [c1Down, cPoints]);
useEffect(() => {
if (!c2Down) return;
window.addEventListener('pointerup', () => {
setC2Down(false);
});
const handlePointerMove = (e: PointerEvent) => {
const newX = cPoints.p2[0] + e.movementX / EDITOR_WIDTH;
if (newX < 0 || newX > 1) {
return;
}
setCPoints(prev => ({
...prev,
p2: [roundToHundredth(prev.p2[0] + e.movementX / EDITOR_WIDTH), roundToHundredth(prev.p2[1] - e.movementY / EDITOR_WIDTH)],
}));
setFunc({
...cPoints,
p1: [roundToHundredth(cPoints.p2[0] + e.movementX / EDITOR_WIDTH), roundToHundredth(cPoints.p2[1] - e.movementY / EDITOR_WIDTH)],
});
};
window.addEventListener('pointermove', handlePointerMove);
return () => window.removeEventListener('pointermove', handlePointerMove);
}, [c2Down, cPoints]);
return (
<div>
<svg className="presBox-bezier-editor" width={`${CONTAINER_WIDTH}`} height={`${CONTAINER_WIDTH}`} xmlns="http://www.w3.org/2000/svg">
{/* Outlines */}
<line x1={`${0 + OFFSET}`} y1={`${EDITOR_WIDTH + OFFSET}`} x2={`${EDITOR_WIDTH + OFFSET}`} y2={`${0 + OFFSET}`} stroke="#c1c1c1" strokeWidth="1" />
{/* Box Outline */}
<rect x={`${0 + OFFSET}`} y={`${0 + OFFSET}`} width={EDITOR_WIDTH} height={EDITOR_WIDTH} stroke="#c5c5c5" fill="transparent" strokeWidth="1" />
{/* Editor */}
<path
d={`M ${0 + OFFSET} ${EDITOR_WIDTH + OFFSET} C ${cPoints.p1[0] * EDITOR_WIDTH + OFFSET} ${EDITOR_WIDTH - cPoints.p1[1] * EDITOR_WIDTH + OFFSET}, ${
cPoints.p2[0] * EDITOR_WIDTH + OFFSET
} ${EDITOR_WIDTH - cPoints.p2[1] * EDITOR_WIDTH + OFFSET}, ${EDITOR_WIDTH + OFFSET} ${0 + OFFSET}`}
stroke="#ffffff"
fill="transparent"
/>
{/* Bottom left */}
<line x1={`${0 + OFFSET}`} y1={`${EDITOR_WIDTH + OFFSET}`} x2={`${cPoints.p1[0] * EDITOR_WIDTH + OFFSET}`} y2={`${EDITOR_WIDTH - cPoints.p1[1] * EDITOR_WIDTH + OFFSET}`} stroke="#ffffff" strokeWidth="1" />
<circle
cx={`${cPoints.p1[0] * EDITOR_WIDTH + OFFSET}`}
cy={`${EDITOR_WIDTH - cPoints.p1[1] * EDITOR_WIDTH + OFFSET}`}
r="5"
fill={`${c1Down ? '#3fa9ff' : '#ffffff'}`}
onPointerDown={e => {
e.stopPropagation();
setC1Down(true);
}}
onPointerUp={e => {
setC1Down(false);
}}
/>
{/* Top right */}
<line x1={`${EDITOR_WIDTH + OFFSET}`} y1={`${0 + OFFSET}`} x2={`${cPoints.p2[0] * EDITOR_WIDTH + OFFSET}`} y2={`${EDITOR_WIDTH - cPoints.p2[1] * EDITOR_WIDTH + OFFSET}`} stroke="#ffffff" strokeWidth="1" />
<circle
cx={`${cPoints.p2[0] * EDITOR_WIDTH + OFFSET}`}
cy={`${EDITOR_WIDTH - cPoints.p2[1] * EDITOR_WIDTH + OFFSET}`}
r="5"
fill={`${c2Down ? '#3fa9ff' : '#ffffff'}`}
onPointerDown={e => {
e.stopPropagation();
setC2Down(true);
}}
onPointerUp={e => {
setC2Down(false);
}}
/>
</svg>
</div>
);
};
export default CubicBezierEditor;
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