自定义颜色取色器

程序员文章站 2022-03-06 23:02:33

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写了三个版本自己看吧

<!DOCTYPE html>
<html>

<head>
    <title>Color Plus</title>
</head>
<style type="text/css">
* {
    box-sizing: border-box;
}

.color-picker {
    width: 330px;
    height: 442px;
    padding: 15px;
    border-radius: 5px;
    box-shadow: 0 10px 40px rgba(10, 20, 70, 0.25);
    background-color: #ffffff;
}

.sat-lightness-picker {
    position: relative;
    height: 300px;
    width: 300px;
    -webkit-user-drag: none;
    user-select: none;
}

.white-overlay,
.black-overlay,
.color-underlay {
    top: 0;
    left: 0;
    position: absolute;
    width: 100%;
    height: 100%;
}

.white-overlay {
    background: linear-gradient(to right, #fff 0%, rgba(255, 255, 255, 0) 100%);
    z-index: 1;
}

.black-overlay {
    background: linear-gradient(to bottom, transparent 0%, #000 100%);
    z-index: 2;
}

.color-underlay {
    background: cyan;
    z-index: 0;
}

.sl-handle {
    position: absolute;
    width: 12px;
    height: 12px;
    margin-left: -6px;
    margin-top: -6px;
    background-color: transparent;
    z-index: 4;
    border-radius: 50%;
    transform: translate3d(300px, 0, 0);
    box-shadow: 0 0 0 3px white, 0 1px 3px 3px rgba(5, 10, 70, 0.33);
}

.sl-handle:hover {
    cursor: pointer;
}

.sl-handle:active {
    transform: scale(1.15);
}

.hue-picker {
    height: 15px;
    width: 100%;
    margin-top: 15px;
    background: linear-gradient(to right, red 0%, #ff0 17%, lime 33%, cyan 50%, blue 66%, #f0f 83%, red 100%);
    box-shadow: inset 0 0 0 3px white, 0 1px 4px rgba(5, 10, 70, 0.25);
}

.transparency {
    width: 99%;
    margin-left: 2px;
    background: transparent;
    /*background: url(king.jpg);*/
    box-shadow: inset 0 0 0 2px white, 0px 0px 9px rgba(5, 10, 70, 0.26);
    height: 13px;
    border-radius: 20px;
}


.hue-picker input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    margin: 0;
    background: transparent;
}

.transparency input[type="range"] {
    position: relative;
    width: 295px;
    height: 9px;
    border-radius: 20px;
    top: -6px;
}

.hue-picker input[type="range"]:focus {
    outline: none;
}

.hue-picker input[type="range"]::-webkit-slider-runnable-track {
    background: transparent;
    border: none;
}

.hue-picker input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    margin-bottom: 3px;
    background-color: transparent;
    border-radius: 50%;
    box-shadow: 0 0 0 3px white, 0 1px 3px 3px rgba(5, 10, 70, 0.33);
}

.transparency input[type="range"]::-webkit-slider-thumb {
    margin-bottom: 1px;
}

.color-output {
    display: flex;
    margin-top: 15px;
    background-image: url(king.jpg);
    background-position: 3px 4px;
}

.color-output input {
    box-shadow: inset 0 0 0 3px white, 0 1px 4px rgba(5, 10, 70, 0.1);
    border: none;
    width: 190px;
    font-size: 16px;
    font-family: "Menlo", monospace;
    padding: 0 15px;
    outline: none;
    background-color: rgb(255, 255, 255);
}

.selected-color {
    width: 100%;
    height: 44px;
    box-shadow: inset 0 0 0 3px #f9f9f9, 0 1px 4px rgba(5, 10, 70, 0.1);
    background-color: cyan;
}
</style>

<body id="colorSample">
    <div class="color-picker" id="colorPicker">
        <div class="sat-lightness-picker" id="slPicker" draggable="false">
            <div class="sl-handle" id="slInput" draggable="false"></div>
            <div class="white-overlay"></div>
            <div class="black-overlay"></div>
            <div id="hueUnderlay" class="color-underlay"></div>
        </div>
        <div class="hue-picker">
            <input id="hueRotation" min="0" max="360" value="180" type="range">
        </div>
        <div class="hue-picker transparency">
            <input id="transparency" min="0" max="360" value="360" type="range">
        </div>
        <div class="color-output">
            <div class="selected-color" id="selectedColor"></div>
            <input type="text" id="hexInput" disabled="disabled">
        </div>
    </div>
</body>
<script type="text/javascript">
const hueRotationInput = document.getElementById('hueRotation');
const hueUnderlay = document.getElementById('hueUnderlay');
const transparency = document.getElementById('transparency');
const slInput = document.getElementById('slInput');
const slPicker = document.getElementById('slPicker');
const selectedColor = document.getElementById('selectedColor');
const hexInput = document.getElementById('hexInput');

const PICKER_HEIGHT = 300;
const PICKER_WIDTH = 300;
let currentHue = 0.5;
let currentSaturation = 1;
let currentValue = 0.5;
let mouseDown = false;
var r, g, b, h = 1;
const rgbToHex = (r, g, b) => {
    return "#" + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1);
}

function hexToR(h) {
    return parseInt((cutHex(h)).substring(0, 2), 16)
}

function hexToG(h) {
    return parseInt((cutHex(h)).substring(2, 4), 16)
}

function hexToB(h) {
    return parseInt((cutHex(h)).substring(4, 6), 16)
}

function cutHex(h) {
    return h.charAt(0) == "#" ? h.substring(1, 7) : h
}

const hsvToRgb = (h, s, v) => {
    var r, g, b;

    var i = Math.floor(h * 6);
    var f = h * 6 - i;
    var p = v * (1 - s);
    var q = v * (1 - f * s);
    var t = v * (1 - (1 - f) * s);

    switch (i % 6) {
        case 0:
            r = v, g = t, b = p;
            break;
        case 1:
            r = q, g = v, b = p;
            break;
        case 2:
            r = p, g = v, b = t;
            break;
        case 3:
            r = p, g = q, b = v;
            break;
        case 4:
            r = t, g = p, b = v;
            break;
        case 5:
            r = v, g = p, b = q;
            break;
    }

    return [Math.floor(r * 255), Math.floor(g * 255), Math.floor(b * 255)];
}

function hexToRgba(hex, opacity) {
    return "rgba(" + parseInt("0x" + hex.slice(1, 3)) + "," + parseInt("0x" + hex.slice(3, 5)) + "," + parseInt("0x" + hex.slice(5, 7)) + "," + opacity + ")";
}

function rgbaToHex(rgba) {
    var bg = rgba.match(/^rgb\((\d+),\s*(\d+),\s*(\d+),\s*(\d?(\d|(\.[1-9]{1,2})))\)$/);

    function hex(x) {
        return ("0" + parseInt(x).toString(16)).slice(-2);
    }
    return ("#" + hex(bg[1]) + hex(bg[2]) + hex(bg[3])).toUpperCase();
}

const getCurrentColor = () => {
    return hsvToRgb(currentHue, currentSaturation, currentValue);
}

const updateColor = () => {
    h = (transparency.value / 360).toFixed(2);
    selectedColor.setAttribute('style', `background-color: rgba(${getCurrentColor()},${h})`);
    // hexInput.value = rgbToHex(...getCurrentColor()); /*Hex写法*/
    // hexInput.value = "rgb("+(getCurrentColor())+","+h+")"; /*Rgb写法*/
    transparency.value / 360 == 1 ? hexInput.value = rgbToHex(...getCurrentColor()) : hexInput.value = "rgba(" + (getCurrentColor()) + "," + h + ")";
    // hexInput.value = selectedColor.style.backgroundColor;
    transparency.setAttribute('style', `background:linear-gradient(to right, transparent 0%, rgb(${getCurrentColor()}) 100%`);
}

hueRotationInput.oninput = () => {
    currentHue = (hueRotationInput.value / 360);
    hueUnderlay.setAttribute('style', `background: rgb(${hsvToRgb(currentHue, 1, 1)})`); //布置取色板
    transparency.setAttribute('style', `background:linear-gradient(to right, transparent 0%, rgb(${hsvToRgb(currentHue, 1, 1)}) 100%`);
    updateColor();
}
transparency.oninput = () => {
    updateColor();

}

const bindSlInputEvents = () => {
    const offsetX = slPicker.offsetLeft;
    const offsetY = slPicker.offsetTop;

    const setSlPosition = (xPos, yPos, setting) => {
        let x = xPos - offsetX;
        let y = yPos - offsetY;

        if (x <= 0) {
            x = 0;
        }
        if (x >= PICKER_WIDTH) {
            x = PICKER_WIDTH;
        }
        if (y <= 0) {
            y = 0
        }
        if (y >= PICKER_HEIGHT) {
            y = PICKER_HEIGHT;
        }

        currentSaturation = (x / PICKER_WIDTH);
        currentValue = (1 - (y / PICKER_HEIGHT));
        slInput.setAttribute('style', `transform: translate3d(${x}px, ${y}px, 1px)`);
    }

    const dragSlInput = e => {
        if (mouseDown) {
            setSlPosition(e.pageX, e.pageY);
            updateColor();
        }
    }

    document.onmousemove = dragSlInput;

    slPicker.onmouseup = () => {
        mouseDown = false;
    }
    document.onmouseup = () => {
        mouseDown = false;
    }
    //点击取色面板
    slPicker.onmousedown = e => {
        mouseDown = true;
        setSlPosition(e.pageX, e.pageY);
        updateColor();
    }

    updateColor();
}

window.onresize = bindSlInputEvents;

bindSlInputEvents();

function setBgColorById(id, sColor) {
    var elems;
    if (document.getElementById) {
        if (elems = document.getElementById(id)) {
            if (elems.style) elems.style.backgroundColor = sColor;
        }
    }
}
</script>

</html>

<!DOCTYPE html>
<html>

<head>
    <title>Color Plus</title>
</head>
<style type="text/css">
* {
    box-sizing: border-box;
}

.color-picker {
    width: 330px;
    height: 442px;
    padding: 15px;
    border-radius: 5px;
    box-shadow: 0 10px 40px rgba(10, 20, 70, 0.25);
    background-color: #ffffff;
}

.sat-lightness-picker {
    position: relative;
    height: 300px;
    width: 300px;
    -webkit-user-drag: none;
    user-select: none;
}

.white-overlay,
.black-overlay,
.color-underlay {
    top: 0;
    left: 0;
    position: absolute;
    width: 100%;
    height: 100%;
}

.white-overlay {
    background: linear-gradient(to right, #fff 0%, rgba(255, 255, 255, 0) 100%);
    z-index: 1;
}

.black-overlay {
    background: linear-gradient(to bottom, transparent 0%, #000 100%);
    z-index: 2;
}

.color-underlay {
    background: cyan;
    z-index: 0;
}

.sl-handle {
    position: absolute;
    width: 12px;
    height: 12px;
    margin-left: -6px;
    margin-top: -6px;
    background-color: transparent;
    z-index: 4;
    border-radius: 50%;
    transform: translate3d(300px, 0, 0);
    box-shadow: 0 0 0 3px white, 0 1px 3px 3px rgba(5, 10, 70, 0.33);
}

.sl-handle:hover {
    cursor: pointer;
}

.sl-handle:active {
    transform: scale(1.15);
}

.hue-picker {
    height: 15px;
    width: 100%;
    margin-top: 15px;
    background: linear-gradient(to right, red 0%, #ff0 17%, lime 33%, cyan 50%, blue 66%, #f0f 83%, red 100%);
    box-shadow: inset 0 0 0 3px white, 0 1px 4px rgba(5, 10, 70, 0.25);
}

.transparency {
    width: 99%;
    margin-left: 2px;
    background:transparent;
    /*background: url(king.jpg);*/
    box-shadow: inset 0 0 0 2px white, 0px 0px 9px rgba(5, 10, 70, 0.26);
    height: 13px;
    border-radius: 20px;
}


.hue-picker input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    margin: 0;
    background: transparent;
}

.transparency input[type="range"] {
    position: relative;
    width: 295px;
    height: 9px;
    border-radius: 20px;
    top:-6px;
}

.hue-picker input[type="range"]:focus {
    outline: none;
}

.hue-picker input[type="range"]::-webkit-slider-runnable-track {
    background: transparent;
    border: none;
}

.hue-picker input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    margin-bottom: 3px;
    background-color: transparent;
    border-radius: 50%;
    box-shadow: 0 0 0 3px white, 0 1px 3px 3px rgba(5, 10, 70, 0.33);
}
.transparency input[type="range"]::-webkit-slider-thumb {
     margin-bottom: 1px;
}
.color-output {
    display: flex;
    margin-top: 15px;
    background-image: url(king.jpg);
    background-position: 3px 4px;
}

.color-output input {
    box-shadow: inset 0 0 0 3px white, 0 1px 4px rgba(5, 10, 70, 0.1);
    border: none;
    width: 190px;
    font-size: 16px;
    font-family: "Menlo", monospace;
    padding: 0 15px;
    outline: none;
    background-color: rgb(255, 255, 255);
}

.selected-color {
    width: 100%;
    height: 44px;
    box-shadow: inset 0 0 0 3px #f9f9f9, 0 1px 4px rgba(5, 10, 70, 0.1);
    background-color: cyan;
}
</style>

<body id="colorSample">
    <div class="color-picker" id="colorPicker">
        <div class="sat-lightness-picker" id="slPicker" draggable="false">
            <div class="sl-handle" id="slInput" draggable="false"></div>
            <div class="white-overlay"></div>
            <div class="black-overlay"></div>
            <div id="hueUnderlay" class="color-underlay"></div>
        </div>
        <div class="hue-picker">
            <input id="hueRotation" min="0" max="360" value="180" type="range">
        </div>
        <div class="hue-picker transparency">
            <input id="transparency" min="0" max="360" value="360" type="range">
        </div>
        <div class="color-output">
            <div class="selected-color" id="selectedColor"></div>
            <input type="text" id="hexInput" disabled="disabled">
        </div>
    </div>
</body>
<script type="text/javascript">
const hueRotationInput = document.getElementById('hueRotation');
const hueUnderlay = document.getElementById('hueUnderlay');
const transparency = document.getElementById('transparency');
const slInput = document.getElementById('slInput');
const slPicker = document.getElementById('slPicker');
const selectedColor = document.getElementById('selectedColor');
const hexInput = document.getElementById('hexInput');

const PICKER_HEIGHT = 300;
const PICKER_WIDTH = 300;
let currentHue = 0.5;
let currentSaturation = 1;
let currentValue = 0.5;
let mouseDown = false;
var r,g,b,h=1;
const rgbToHex = (r, g, b) => {
    return "#" + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1);
}

function aToHex(num){
    return Math.round(num*255).toString(16);
}
const rgbaTohex =(r,g,b,a) =>{
    return "#" + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1) + Math.round(a*255).toString(16);
}
function hexToR(h) {
    return parseInt((cutHex(h)).substring(0, 2), 16)
}

function hexToG(h) {
    return parseInt((cutHex(h)).substring(2, 4), 16)
}

function hexToB(h) {
    return parseInt((cutHex(h)).substring(4, 6), 16)
}

function cutHex(h) {
    return h.charAt(0) == "#" ? h.substring(1, 7) : h
}

function hexToRgba(hex, opacity) { 
    return "rgba(" + parseInt("0x" + hex.slice(1, 3)) + "," + parseInt("0x" + hex.slice(3, 5)) + "," + parseInt("0x" + hex.slice(5, 7)) + "," + opacity + ")"; 
}

const hsvToRgb = (h, s, v) => {
    var r, g, b;

    var i = Math.floor(h * 6);
    var f = h * 6 - i;
    var p = v * (1 - s);
    var q = v * (1 - f * s);
    var t = v * (1 - (1 - f) * s);

    switch (i % 6) {
        case 0:
            r = v, g = t, b = p;
            break;
        case 1:
            r = q, g = v, b = p;
            break;
        case 2:
            r = p, g = v, b = t;
            break;
        case 3:
            r = p, g = q, b = v;
            break;
        case 4:
            r = t, g = p, b = v;
            break;
        case 5:
            r = v, g = p, b = q;
            break;
    }

    return [Math.floor(r * 255), Math.floor(g * 255), Math.floor(b * 255)];
}

const getCurrentColor = () => {
    return hsvToRgb(currentHue, currentSaturation, currentValue);
}

const updateColor = () => {
    h=(transparency.value/360).toFixed(2);
    
    selectedColor.setAttribute('style', `background-color: rgba(${getCurrentColor()},${h})`);
    // hexInput.value = rgbToHex(...getCurrentColor()); /*Hex写法*/
    // hexInput.value = "rgb("+(getCurrentColor())+","+h+")"; /*Rgb写法*/
    // transparency.value/360==1?hexInput.value = rgbToHex(...getCurrentColor()) : hexInput.value = "rgba("+(getCurrentColor())+","+h+")";
    h=aToHex(h);if(h=="ff") h="";
    hexInput.value = rgbToHex(...getCurrentColor())+h;
    transparency.setAttribute('style', `background:linear-gradient(to right, transparent 0%, rgb(${getCurrentColor()}) 100%`);
}

hueRotationInput.oninput = () => {
    currentHue = (hueRotationInput.value / 360);
    hueUnderlay.setAttribute('style', `background: rgb(${hsvToRgb(currentHue, 1, 1)})`);//布置取色板
    transparency.setAttribute('style', `background:linear-gradient(to right, transparent 0%, rgb(${hsvToRgb(currentHue, 1, 1)}) 100%`);
    updateColor();
}
transparency.oninput = () =>{
     updateColor();

}

const bindSlInputEvents = () => {
    const offsetX = slPicker.offsetLeft;
    const offsetY = slPicker.offsetTop;

    const setSlPosition = (xPos, yPos, setting) => {
        let x = xPos - offsetX;
        let y = yPos - offsetY;

        if (x <= 0) {
            x = 0;
        }
        if (x >= PICKER_WIDTH) {
            x = PICKER_WIDTH;
        }
        if (y <= 0) {
            y = 0
        }
        if (y >= PICKER_HEIGHT) {
            y = PICKER_HEIGHT;
        }

        currentSaturation = (x / PICKER_WIDTH);
        currentValue = (1 - (y / PICKER_HEIGHT));
        slInput.setAttribute('style', `transform: translate3d(${x}px, ${y}px, 1px)`);
    }

    const dragSlInput = e => {
        if (mouseDown) {
            setSlPosition(e.pageX, e.pageY);
            updateColor();
        }
    }

    document.onmousemove = dragSlInput;

    slPicker.onmouseup = () => {
        mouseDown = false;
    }
    document.onmouseup = () => {
        mouseDown = false;
    }
    //点击取色面板
    slPicker.onmousedown = e => {
        mouseDown = true;
        setSlPosition(e.pageX, e.pageY);
        updateColor();
    }

    updateColor();
}

window.onresize = bindSlInputEvents;

bindSlInputEvents();

</script>

</html>

<!DOCTYPE html>
<html>

<head>
    <title>Color Plus</title>
</head>
<style type="text/css">
* {
    box-sizing: border-box;
}

.color-picker {
    width: 330px;
    height: 442px;
    padding: 15px;
    border-radius: 5px;
    box-shadow: 0 10px 40px rgba(10, 20, 70, 0.25);
    background-color: #ffffff;
}

.sat-lightness-picker {
    position: relative;
    height: 300px;
    width: 300px;
    -webkit-user-drag: none;
    user-select: none;
}

.white-overlay,
.black-overlay,
.color-underlay {
    top: 0;
    left: 0;
    position: absolute;
    width: 100%;
    height: 100%;
}

.white-overlay {
    background: linear-gradient(to right, #fff 0%, rgba(255, 255, 255, 0) 100%);
    z-index: 1;
}

.black-overlay {
    background: linear-gradient(to bottom, transparent 0%, #000 100%);
    z-index: 2;
}

.color-underlay {
    background: cyan;
    z-index: 0;
}

.sl-handle {
    position: absolute;
    width: 12px;
    height: 12px;
    margin-left: -6px;
    margin-top: -6px;
    background-color: transparent;
    z-index: 4;
    border-radius: 50%;
    transform: translate3d(300px, 0, 0);
    box-shadow: 0 0 0 3px white, 0 1px 3px 3px rgba(5, 10, 70, 0.33);
}

.sl-handle:hover {
    cursor: pointer;
}

.sl-handle:active {
    transform: scale(1.15);
}

.hue-picker {
    height: 15px;
    width: 100%;
    margin-top: 15px;
    background: linear-gradient(to right, red 0%, #ff0 17%, lime 33%, cyan 50%, blue 66%, #f0f 83%, red 100%);
    box-shadow: inset 0 0 0 3px white, 0 1px 4px rgba(5, 10, 70, 0.25);
}

.transparency {
    width: 99%;
    background: url(king.jpg);
    box-shadow: inset 0 0 0 2px white, 0px 0px 9px rgba(5, 10, 70, 0.26);
    height: 13px;
    border-radius: 20px;
}


.hue-picker input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    margin: 0;
    background: transparent;
}

.transparency input[type="range"] {
    position: relative;
    width: 295px;
    height: 9px;
    border-radius: 20px;
    top:-6px;
}

.hue-picker input[type="range"]:focus {
    outline: none;
}

.hue-picker input[type="range"]::-webkit-slider-runnable-track {
    background: transparent;
    border: none;
}

.hue-picker input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    margin-bottom: 3px;
    background-color: transparent;
    border-radius: 50%;
    box-shadow: 0 0 0 3px white, 0 1px 3px 3px rgba(5, 10, 70, 0.33);
}
.transparency input[type="range"]::-webkit-slider-thumb {
     margin-bottom: 1px;
}
.color-output {
    display: flex;
    margin-top: 15px;
      background-image: url(king.jpg);
}

.color-output input {
    box-shadow: inset 0 0 0 3px white, 0 1px 4px rgba(5, 10, 70, 0.1);
    border: none;
    /*width: 100px;*/
    width: auto;
    font-size: 16px;
    font-family: "Menlo", monospace;
    padding: 0 15px;
    outline: none;
}

.selected-color {
    width: 100%;
    height: 44px;
    box-shadow: inset 0 0 0 3px white, 0 1px 4px rgba(5, 10, 70, 0.1);
    background-color: cyan;
}
</style>

<body id="colorSample">
    <div class="color-picker" id="colorPicker">
        <div class="sat-lightness-picker" id="slPicker" draggable="false">
            <div class="sl-handle" id="slInput" draggable="false"></div>
            <div class="white-overlay"></div>
            <div class="black-overlay"></div>
            <div id="hueUnderlay" class="color-underlay"></div>
        </div>
        <div class="hue-picker">
            <input id="hueRotation" min="0" max="360" value="180" type="range">
        </div>
        <div class="hue-picker transparency">
            <input id="transparency" min="0" max="360" value="360" type="range">
        </div>
        <div class="color-output">
            <div class="selected-color" id="selectedColor"></div>
            <input type="text" id="hexInput">
        </div>
    </div>
</body>
<script type="text/javascript">
const hueRotationInput = document.getElementById('hueRotation');
const hueUnderlay = document.getElementById('hueUnderlay');
const transparency = document.getElementById('transparency');
const slInput = document.getElementById('slInput');
const slPicker = document.getElementById('slPicker');
const selectedColor = document.getElementById('selectedColor');
const hexInput = document.getElementById('hexInput');

const PICKER_HEIGHT = 300;
const PICKER_WIDTH = 300;
let currentHue = 0.5;
let currentSaturation = 1;
let currentValue = 0.5;
let mouseDown = false;
var r,g,b,h=1;
const rgbToHex = (r, g, b) => {
    return "#" + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1);
}

function hexToR(h) {
    return parseInt((cutHex(h)).substring(0, 2), 16)
}

function hexToG(h) {
    return parseInt((cutHex(h)).substring(2, 4), 16)
}

function hexToB(h) {
    return parseInt((cutHex(h)).substring(4, 6), 16)
}

function cutHex(h) {
    return h.charAt(0) == "#" ? h.substring(1, 7) : h
}

const hsvToRgb = (h, s, v) => {
    var r, g, b;

    var i = Math.floor(h * 6);
    var f = h * 6 - i;
    var p = v * (1 - s);
    var q = v * (1 - f * s);
    var t = v * (1 - (1 - f) * s);

    switch (i % 6) {
        case 0:
            r = v, g = t, b = p;
            break;
        case 1:
            r = q, g = v, b = p;
            break;
        case 2:
            r = p, g = v, b = t;
            break;
        case 3:
            r = p, g = q, b = v;
            break;
        case 4:
            r = t, g = p, b = v;
            break;
        case 5:
            r = v, g = p, b = q;
            break;
    }

    return [Math.floor(r * 255), Math.floor(g * 255), Math.floor(b * 255)];
}

const getCurrentColor = () => {
    return hsvToRgb(currentHue, currentSaturation, currentValue);
}

const updateColor = () => {
    h=(transparency.value/360).toFixed(2);
    selectedColor.setAttribute('style', `background-color: rgba(${getCurrentColor()},${h})`);
    // hexInput.value = rgbToHex(...getCurrentColor()); /*Hex写法*/
    // hexInput.value = "rgb("+(getCurrentColor())+","+h+")"; /*Rgb写法*/
    transparency.value/360==1?hexInput.value = rgbToHex(...getCurrentColor()):hexInput.value = "rgba("+(getCurrentColor())+","+h+")";
    transparency.setAttribute('style', `background:linear-gradient(to right, transparent 0%, rgb(${getCurrentColor()}) 100%`);
}

hueRotationInput.oninput = () => {
    currentHue = (hueRotationInput.value / 360);
    hueUnderlay.setAttribute('style', `background: rgb(${hsvToRgb(currentHue, 1, 1)})`);//布置取色板
    transparency.setAttribute('style', `background:linear-gradient(to right, transparent 0%, rgb(${hsvToRgb(currentHue, 1, 1)}) 100%`);
    updateColor();
}
transparency.oninput = () =>{
     updateColor();

}

const bindSlInputEvents = () => {
    const offsetX = slPicker.offsetLeft;
    const offsetY = slPicker.offsetTop;

    const setSlPosition = (xPos, yPos, setting) => {
        let x = xPos - offsetX;
        let y = yPos - offsetY;

        if (x <= 0) {
            x = 0;
        }
        if (x >= PICKER_WIDTH) {
            x = PICKER_WIDTH;
        }
        if (y <= 0) {
            y = 0
        }
        if (y >= PICKER_HEIGHT) {
            y = PICKER_HEIGHT;
        }

        currentSaturation = (x / PICKER_WIDTH);
        currentValue = (1 - (y / PICKER_HEIGHT));
        slInput.setAttribute('style', `transform: translate3d(${x}px, ${y}px, 1px)`);
    }

    const dragSlInput = e => {
        if (mouseDown) {
            setSlPosition(e.pageX, e.pageY);
            updateColor();
        }
    }

    document.onmousemove = dragSlInput;

    slPicker.onmouseup = () => {
        mouseDown = false;
    }
    document.onmouseup = () => {
        mouseDown = false;
    }
    //点击取色面板
    slPicker.onmousedown = e => {
        mouseDown = true;
        setSlPosition(e.pageX, e.pageY);
        updateColor();
    }

    updateColor();
}

window.onresize = bindSlInputEvents;

bindSlInputEvents();

function setBgColorById(id, sColor) {
    var elems;
    if (document.getElementById) {
        if (elems = document.getElementById(id)) {
            if (elems.style) elems.style.backgroundColor = sColor;
        }
    }
}
//hex 转 rgb
function change(){
    setBgColorById('colorSample',hexInput.value);
    r=hexToR(hexInput.value);
    g=hexToG(hexInput.value);
    b=hexToB(hexInput.value);
    hexInput.value=("rgb("+r+","+g+","+b+","+h+")");
    hexInput.setAttribute('style', `width:175px`);
}
</script>

</html>

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