File size: 1,167 Bytes
1e92f2d |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 |
export const calculateChange = (e, hsl, direction, initialA, container) => {
const containerWidth = container.clientWidth
const containerHeight = container.clientHeight
const x = typeof e.pageX === 'number' ? e.pageX : e.touches[0].pageX
const y = typeof e.pageY === 'number' ? e.pageY : e.touches[0].pageY
const left = x - (container.getBoundingClientRect().left + window.pageXOffset)
const top = y - (container.getBoundingClientRect().top + window.pageYOffset)
if (direction === 'vertical') {
let a
if (top < 0) {
a = 0
} else if (top > containerHeight) {
a = 1
} else {
a = Math.round((top * 100) / containerHeight) / 100
}
if (hsl.a !== a) {
return {
h: hsl.h,
s: hsl.s,
l: hsl.l,
a,
source: 'rgb',
}
}
} else {
let a
if (left < 0) {
a = 0
} else if (left > containerWidth) {
a = 1
} else {
a = Math.round((left * 100) / containerWidth) / 100
}
if (initialA !== a) {
return {
h: hsl.h,
s: hsl.s,
l: hsl.l,
a,
source: 'rgb',
}
}
}
return null
}
|