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526 lines
19 KiB
526 lines
19 KiB
let Hammer = require('../module/hammer');
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let hammerUtil = require('../hammerUtil');
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let util = require('../util');
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class ColorPicker {
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constructor(pixelRatio = 1) {
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this.pixelRatio = pixelRatio;
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this.generated = false;
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this.centerCoordinates = {x:289/2, y:289/2};
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this.r = 289 * 0.49;
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this.color = {r:255,g:255,b:255,a:1.0};
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this.hueCircle = undefined;
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this.initialColor = {r:255,g:255,b:255,a:1.0};
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this.previousColor= undefined;
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this.applied = false;
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// bound by
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this.updateCallback = () => {};
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// create all DOM elements
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this._create();
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}
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/**
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* this inserts the colorPicker into a div from the DOM
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* @param container
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*/
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insertTo(container) {
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if (this.hammer !== undefined) {
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this.hammer.destroy();
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this.hammer = undefined;
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}
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this.container = container;
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this.container.appendChild(this.frame);
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this._bindHammer();
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this._setSize();
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}
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/**
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* the callback is executed on apply and save. Bind it to the application
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* @param callback
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*/
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setCallback(callback) {
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if (typeof callback === 'function') {
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this.updateCallback = callback;
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}
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else {
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throw new Error("Function attempted to set as colorPicker callback is not a function.");
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}
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}
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_isColorString(color) {
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var htmlColors = {black: '#000000',navy: '#000080',darkblue: '#00008B',mediumblue: '#0000CD',blue: '#0000FF',darkgreen: '#006400',green: '#008000',teal: '#008080',darkcyan: '#008B8B',deepskyblue: '#00BFFF',darkturquoise: '#00CED1',mediumspringgreen: '#00FA9A',lime: '#00FF00',springgreen: '#00FF7F',aqua: '#00FFFF',cyan: '#00FFFF',midnightblue: '#191970',dodgerblue: '#1E90FF',lightseagreen: '#20B2AA',forestgreen: '#228B22',seagreen: '#2E8B57',darkslategray: '#2F4F4F',limegreen: '#32CD32',mediumseagreen: '#3CB371',turquoise: '#40E0D0',royalblue: '#4169E1',steelblue: '#4682B4',darkslateblue: '#483D8B',mediumturquoise: '#48D1CC',indigo: '#4B0082',darkolivegreen: '#556B2F',cadetblue: '#5F9EA0',cornflowerblue: '#6495ED',mediumaquamarine: '#66CDAA',dimgray: '#696969',slateblue: '#6A5ACD',olivedrab: '#6B8E23',slategray: '#708090',lightslategray: '#778899',mediumslateblue: '#7B68EE',lawngreen: '#7CFC00',chartreuse: '#7FFF00',aquamarine: '#7FFFD4',maroon: '#800000',purple: '#800080',olive: '#808000',gray: '#808080',skyblue: '#87CEEB',lightskyblue: '#87CEFA',blueviolet: '#8A2BE2',darkred: '#8B0000',darkmagenta: '#8B008B',saddlebrown: '#8B4513',darkseagreen: '#8FBC8F',lightgreen: '#90EE90',mediumpurple: '#9370D8',darkviolet: '#9400D3',palegreen: '#98FB98',darkorchid: '#9932CC',yellowgreen: '#9ACD32',sienna: '#A0522D',brown: '#A52A2A',darkgray: '#A9A9A9',lightblue: '#ADD8E6',greenyellow: '#ADFF2F',paleturquoise: '#AFEEEE',lightsteelblue: '#B0C4DE',powderblue: '#B0E0E6',firebrick: '#B22222',darkgoldenrod: '#B8860B',mediumorchid: '#BA55D3',rosybrown: '#BC8F8F',darkkhaki: '#BDB76B',silver: '#C0C0C0',mediumvioletred: '#C71585',indianred: '#CD5C5C',peru: '#CD853F',chocolate: '#D2691E',tan: '#D2B48C',lightgrey: '#D3D3D3',palevioletred: '#D87093',thistle: '#D8BFD8',orchid: '#DA70D6',goldenrod: '#DAA520',crimson: '#DC143C',gainsboro: '#DCDCDC',plum: '#DDA0DD',burlywood: '#DEB887',lightcyan: '#E0FFFF',lavender: '#E6E6FA',darksalmon: '#E9967A',violet: '#EE82EE',palegoldenrod: '#EEE8AA',lightcoral: '#F08080',khaki: '#F0E68C',aliceblue: '#F0F8FF',honeydew: '#F0FFF0',azure: '#F0FFFF',sandybrown: '#F4A460',wheat: '#F5DEB3',beige: '#F5F5DC',whitesmoke: '#F5F5F5',mintcream: '#F5FFFA',ghostwhite: '#F8F8FF',salmon: '#FA8072',antiquewhite: '#FAEBD7',linen: '#FAF0E6',lightgoldenrodyellow: '#FAFAD2',oldlace: '#FDF5E6',red: '#FF0000',fuchsia: '#FF00FF',magenta: '#FF00FF',deeppink: '#FF1493',orangered: '#FF4500',tomato: '#FF6347',hotpink: '#FF69B4',coral: '#FF7F50',darkorange: '#FF8C00',lightsalmon: '#FFA07A',orange: '#FFA500',lightpink: '#FFB6C1',pink: '#FFC0CB',gold: '#FFD700',peachpuff: '#FFDAB9',navajowhite: '#FFDEAD',moccasin: '#FFE4B5',bisque: '#FFE4C4',mistyrose: '#FFE4E1',blanchedalmond: '#FFEBCD',papayawhip: '#FFEFD5',lavenderblush: '#FFF0F5',seashell: '#FFF5EE',cornsilk: '#FFF8DC',lemonchiffon: '#FFFACD',floralwhite: '#FFFAF0',snow: '#FFFAFA',yellow: '#FFFF00',lightyellow: '#FFFFE0',ivory: '#FFFFF0',white: '#FFFFFF'};
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if (typeof color === 'string') {
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return htmlColors[color];
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}
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}
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/**
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* Set the color of the colorPicker
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* Supported formats:
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* 'red' --> HTML color string
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* '#ffffff' --> hex string
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* 'rbg(255,255,255)' --> rgb string
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* 'rgba(255,255,255,1.0)' --> rgba string
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* {r:255,g:255,b:255} --> rgb object
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* {r:255,g:255,b:255,a:1.0} --> rgba object
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* @param color
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* @param setInitial
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*/
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setColor(color, setInitial = true) {
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if (color === 'none') {
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return;
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}
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let rgba;
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// if a html color shorthand is used, convert to hex
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var htmlColor = this._isColorString(color);
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if (htmlColor !== undefined) {
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color = htmlColor;
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}
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// check format
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if (util.isString(color) === true) {
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if (util.isValidRGB(color) === true) {
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let rgbaArray = color.substr(4).substr(0, color.length - 5).split(',');
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rgba = {r:rgbaArray[0], g:rgbaArray[1], b:rgbaArray[2], a:1.0};
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}
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else if (util.isValidRGBA(color) === true) {
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let rgbaArray = color.substr(5).substr(0, color.length - 6).split(',');
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rgba = {r:rgbaArray[0], g:rgbaArray[1], b:rgbaArray[2], a:rgbaArray[3]};
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}
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else if (util.isValidHex(color) === true) {
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let rgbObj = util.hexToRGB(color);
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rgba = {r:rgbObj.r, g:rgbObj.g, b:rgbObj.b, a:1.0};
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}
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}
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else {
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if (color instanceof Object) {
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if (color.r !== undefined && color.g !== undefined && color.b !== undefined) {
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let alpha = color.a !== undefined ? color.a : '1.0';
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rgba = {r:color.r, g:color.g, b:color.b, a:alpha};
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}
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}
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}
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// set color
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if (rgba === undefined) {
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throw new Error("Unknown color passed to the colorPicker. Supported are strings: rgb, hex, rgba. Object: rgb ({r:r,g:g,b:b,[a:a]}). Supplied: " + JSON.stringify(color));
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}
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else {
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this._setColor(rgba, setInitial);
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}
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}
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/**
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* this shows the color picker at a location. The hue circle is constructed once and stored.
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* @param x
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* @param y
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*/
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show(x,y) {
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this.applied = false;
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this.frame.style.display = 'block';
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this.frame.style.top = y + 'px';
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this.frame.style.left = x + 'px';
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this._generateHueCircle();
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}
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// ------------------------------------------ PRIVATE ----------------------------- //
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/**
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* Hide the picker. Is called by the cancel button.
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* Optional boolean to store the previous color for easy access later on.
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* @param storePrevious
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* @private
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*/
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_hide(storePrevious = true) {
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// store the previous color for next time;
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if (storePrevious === true) {
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this.previousColor = util.extend({}, this.color);
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}
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if (this.applied === true) {
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this.updateCallback(this.initialColor);
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}
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this.frame.style.display = 'none';
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}
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/**
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* bound to the save button. Saves and hides.
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* @private
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*/
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_save() {
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this.updateCallback(this.color);
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this.applied = false;
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this._hide();
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}
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/**
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* Bound to apply button. Saves but does not close. Is undone by the cancel button.
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* @private
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*/
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_apply() {
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this.applied = true;
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this.updateCallback(this.color);
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this._updatePicker(this.color);
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}
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/**
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* load the color from the previous session.
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* @private
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*/
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_loadLast() {
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if (this.previousColor !== undefined) {
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this.setColor(this.previousColor, false);
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}
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else {
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alert("There is no last color to load...");
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}
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}
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/**
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* set the color, place the picker
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* @param rgba
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* @param setInitial
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* @private
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*/
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_setColor(rgba, setInitial = true) {
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// store the initial color
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if (setInitial === true) {
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this.initialColor = util.extend({}, rgba);
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}
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this.color = rgba;
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let hsv = util.RGBToHSV(rgba.r, rgba.g, rgba.b);
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let angleConvert = 2 * Math.PI;
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let radius = this.r * hsv.s;
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let x = this.centerCoordinates.x + radius * Math.sin(angleConvert * hsv.h);
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let y = this.centerCoordinates.y + radius * Math.cos(angleConvert * hsv.h);
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this.colorPickerSelector.style.left = x - 0.5 * this.colorPickerSelector.clientWidth + 'px';
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this.colorPickerSelector.style.top = y - 0.5 * this.colorPickerSelector.clientHeight + 'px';
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this._updatePicker(rgba);
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}
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/**
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* bound to opacity control
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* @param value
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* @private
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*/
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_setOpacity(value) {
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this.color.a = value / 100;
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this._updatePicker(this.color);
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}
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/**
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* bound to brightness control
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* @param value
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* @private
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*/
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_setBrightness(value) {
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let hsv = util.RGBToHSV(this.color.r, this.color.g, this.color.b);
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hsv.v = value / 100;
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let rgba = util.HSVToRGB(hsv.h, hsv.s, hsv.v);
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rgba['a'] = this.color.a;
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this.color = rgba;
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this._updatePicker();
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}
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/**
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* update the colorpicker. A black circle overlays the hue circle to mimic the brightness decreasing.
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* @param rgba
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* @private
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*/
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_updatePicker(rgba = this.color) {
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let hsv = util.RGBToHSV(rgba.r, rgba.g, rgba.b);
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let ctx = this.colorPickerCanvas.getContext('2d');
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if (this.pixelRation === undefined) {
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this.pixelRatio = (window.devicePixelRatio || 1) / (ctx.webkitBackingStorePixelRatio ||
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ctx.mozBackingStorePixelRatio ||
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ctx.msBackingStorePixelRatio ||
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ctx.oBackingStorePixelRatio ||
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ctx.backingStorePixelRatio || 1);
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}
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ctx.setTransform(this.pixelRatio, 0, 0, this.pixelRatio, 0, 0);
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// clear the canvas
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let w = this.colorPickerCanvas.clientWidth;
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let h = this.colorPickerCanvas.clientHeight;
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ctx.clearRect(0, 0, w, h);
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ctx.putImageData(this.hueCircle, 0,0);
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ctx.fillStyle = 'rgba(0,0,0,' + (1- hsv.v) + ')';
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ctx.circle(this.centerCoordinates.x, this.centerCoordinates.y, this.r);
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ctx.fill();
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this.brightnessRange.value = 100 * hsv.v;
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this.opacityRange.value = 100 * rgba.a;
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this.initialColorDiv.style.backgroundColor = 'rgba(' + this.initialColor.r + ',' + this.initialColor.g + ',' + this.initialColor.b + ',' + this.initialColor.a + ')';
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this.newColorDiv.style.backgroundColor = 'rgba(' + this.color.r + ',' + this.color.g + ',' + this.color.b + ',' + this.color.a + ')';
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}
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/**
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* used by create to set the size of the canvas.
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* @private
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*/
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_setSize() {
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this.colorPickerCanvas.style.width = '100%';
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this.colorPickerCanvas.style.height = '100%';
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this.colorPickerCanvas.width = 289 * this.pixelRatio;
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this.colorPickerCanvas.height = 289 * this.pixelRatio;
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}
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/**
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* create all dom elements
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* TODO: cleanup, lots of similar dom elements
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* @private
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*/
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_create() {
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this.frame = document.createElement('div');
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this.frame.className = 'vis-color-picker';
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this.colorPickerDiv = document.createElement('div');
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this.colorPickerSelector = document.createElement('div');
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this.colorPickerSelector.className = 'vis-selector';
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this.colorPickerDiv.appendChild(this.colorPickerSelector);
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this.colorPickerCanvas = document.createElement('canvas');
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this.colorPickerDiv.appendChild(this.colorPickerCanvas);
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if (!this.colorPickerCanvas.getContext) {
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let noCanvas = document.createElement( 'DIV' );
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noCanvas.style.color = 'red';
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noCanvas.style.fontWeight = 'bold' ;
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noCanvas.style.padding = '10px';
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noCanvas.innerHTML = 'Error: your browser does not support HTML canvas';
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this.colorPickerCanvas.appendChild(noCanvas);
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}
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else {
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let ctx = this.colorPickerCanvas.getContext("2d");
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this.pixelRatio = (window.devicePixelRatio || 1) / (ctx.webkitBackingStorePixelRatio ||
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ctx.mozBackingStorePixelRatio ||
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ctx.msBackingStorePixelRatio ||
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ctx.oBackingStorePixelRatio ||
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ctx.backingStorePixelRatio || 1);
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this.colorPickerCanvas.getContext("2d").setTransform(this.pixelRatio, 0, 0, this.pixelRatio, 0, 0);
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}
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this.colorPickerDiv.className = 'vis-color';
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this.opacityDiv = document.createElement('div');
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this.opacityDiv.className = 'vis-opacity';
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this.brightnessDiv = document.createElement('div');
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this.brightnessDiv.className = 'vis-brightness';
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this.arrowDiv = document.createElement('div');
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this.arrowDiv.className = 'vis-arrow';
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this.opacityRange = document.createElement('input');
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this.opacityRange.type = 'range';
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this.opacityRange.min = '0';
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this.opacityRange.max = '100';
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this.opacityRange.value = '100';
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this.opacityRange.className = 'vis-range';
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this.brightnessRange = document.createElement('input');
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this.brightnessRange.type = 'range';
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this.brightnessRange.min = '0';
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this.brightnessRange.max = '100';
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this.brightnessRange.value = '100';
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this.brightnessRange.className = 'vis-range';
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this.opacityDiv.appendChild(this.opacityRange);
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this.brightnessDiv.appendChild(this.brightnessRange);
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var me = this;
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this.opacityRange.onchange = function () {me._setOpacity(this.value);};
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this.opacityRange.oninput = function () {me._setOpacity(this.value);};
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this.brightnessRange.onchange = function () {me._setBrightness(this.value);};
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this.brightnessRange.oninput = function () {me._setBrightness(this.value);};
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this.brightnessLabel = document.createElement("div");
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this.brightnessLabel.className = "vis-label vis-brightness";
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this.brightnessLabel.innerHTML = 'brightness:';
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this.opacityLabel = document.createElement("div");
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this.opacityLabel.className = "vis-label vis-opacity";
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this.opacityLabel.innerHTML = 'opacity:';
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this.newColorDiv = document.createElement("div");
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this.newColorDiv.className = "vis-new-color";
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this.newColorDiv.innerHTML = 'new';
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this.initialColorDiv = document.createElement("div");
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this.initialColorDiv.className = "vis-initial-color";
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this.initialColorDiv.innerHTML = 'initial';
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this.cancelButton = document.createElement("div");
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this.cancelButton.className = "vis-button vis-cancel";
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this.cancelButton.innerHTML = 'cancel';
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this.cancelButton.onclick = this._hide.bind(this, false);
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this.applyButton = document.createElement("div");
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this.applyButton.className = "vis-button vis-apply";
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this.applyButton.innerHTML = 'apply';
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this.applyButton.onclick = this._apply.bind(this);
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this.saveButton = document.createElement("div");
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this.saveButton.className = "vis-button vis-save";
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this.saveButton.innerHTML = 'save';
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this.saveButton.onclick = this._save.bind(this);
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this.loadButton = document.createElement("div");
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this.loadButton.className = "vis-button vis-load";
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this.loadButton.innerHTML = 'load last';
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this.loadButton.onclick = this._loadLast.bind(this);
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this.frame.appendChild(this.colorPickerDiv);
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this.frame.appendChild(this.arrowDiv);
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this.frame.appendChild(this.brightnessLabel);
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this.frame.appendChild(this.brightnessDiv);
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this.frame.appendChild(this.opacityLabel);
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this.frame.appendChild(this.opacityDiv);
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this.frame.appendChild(this.newColorDiv);
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this.frame.appendChild(this.initialColorDiv);
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this.frame.appendChild(this.cancelButton);
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this.frame.appendChild(this.applyButton);
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this.frame.appendChild(this.saveButton);
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this.frame.appendChild(this.loadButton);
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}
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/**
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* bind hammer to the color picker
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* @private
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*/
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_bindHammer() {
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this.drag = {};
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this.pinch = {};
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this.hammer = new Hammer(this.colorPickerCanvas);
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this.hammer.get('pinch').set({enable: true});
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hammerUtil.onTouch(this.hammer, (event) => {this._moveSelector(event)});
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this.hammer.on('tap', (event) => {this._moveSelector(event)});
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this.hammer.on('panstart', (event) => {this._moveSelector(event)});
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this.hammer.on('panmove', (event) => {this._moveSelector(event)});
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this.hammer.on('panend', (event) => {this._moveSelector(event)});
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}
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/**
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* generate the hue circle. This is relatively heavy (200ms) and is done only once on the first time it is shown.
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* @private
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*/
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_generateHueCircle() {
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if (this.generated === false) {
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let ctx = this.colorPickerCanvas.getContext('2d');
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if (this.pixelRation === undefined) {
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this.pixelRatio = (window.devicePixelRatio || 1) / (ctx.webkitBackingStorePixelRatio ||
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ctx.mozBackingStorePixelRatio ||
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ctx.msBackingStorePixelRatio ||
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ctx.oBackingStorePixelRatio ||
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ctx.backingStorePixelRatio || 1);
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}
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ctx.setTransform(this.pixelRatio, 0, 0, this.pixelRatio, 0, 0);
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// clear the canvas
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let w = this.colorPickerCanvas.clientWidth;
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let h = this.colorPickerCanvas.clientHeight;
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ctx.clearRect(0, 0, w, h);
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// draw hue circle
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let x, y, hue, sat;
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this.centerCoordinates = {x: w * 0.5, y: h * 0.5};
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this.r = 0.49 * w;
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let angleConvert = (2 * Math.PI) / 360;
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let hfac = 1 / 360;
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let sfac = 1 / this.r;
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let rgb;
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for (hue = 0; hue < 360; hue++) {
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for (sat = 0; sat < this.r; sat++) {
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x = this.centerCoordinates.x + sat * Math.sin(angleConvert * hue);
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y = this.centerCoordinates.y + sat * Math.cos(angleConvert * hue);
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rgb = util.HSVToRGB(hue * hfac, sat * sfac, 1);
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ctx.fillStyle = 'rgb(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ')';
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ctx.fillRect(x - 0.5, y - 0.5, 2, 2);
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}
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}
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ctx.strokeStyle = 'rgba(0,0,0,1)';
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ctx.circle(this.centerCoordinates.x, this.centerCoordinates.y, this.r);
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ctx.stroke();
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this.hueCircle = ctx.getImageData(0,0,w,h);
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}
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this.generated = true;
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}
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/**
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* move the selector. This is called by hammer functions.
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*
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* @param event
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* @private
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*/
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_moveSelector(event) {
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let rect = this.colorPickerDiv.getBoundingClientRect();
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let left = event.center.x - rect.left;
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let top = event.center.y - rect.top;
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let centerY = 0.5 * this.colorPickerDiv.clientHeight;
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let centerX = 0.5 * this.colorPickerDiv.clientWidth;
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let x = left - centerX;
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let y = top - centerY;
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let angle = Math.atan2(x,y);
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let radius = 0.98 * Math.min(Math.sqrt(x * x + y * y), centerX);
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let newTop = Math.cos(angle) * radius + centerY;
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let newLeft = Math.sin(angle) * radius + centerX;
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this.colorPickerSelector.style.top = newTop - 0.5 * this.colorPickerSelector.clientHeight + 'px';
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this.colorPickerSelector.style.left = newLeft - 0.5 * this.colorPickerSelector.clientWidth + 'px';
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// set color
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let h = angle / (2 * Math.PI);
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h = h < 0 ? h + 1 : h;
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let s = radius / this.r;
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let hsv = util.RGBToHSV(this.color.r, this.color.g, this.color.b);
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hsv.h = h;
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hsv.s = s;
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let rgba = util.HSVToRGB(hsv.h, hsv.s, hsv.v);
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rgba['a'] = this.color.a;
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this.color = rgba;
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// update previews
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this.initialColorDiv.style.backgroundColor = 'rgba(' + this.initialColor.r + ',' + this.initialColor.g + ',' + this.initialColor.b + ',' + this.initialColor.a + ')';
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this.newColorDiv.style.backgroundColor = 'rgba(' + this.color.r + ',' + this.color.g + ',' + this.color.b + ',' + this.color.a + ')';
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}
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}
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export default ColorPicker;
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