farbtastic.js (7689B)
1 /*! 2 * Farbtastic: jQuery color picker plug-in v1.3u 3 * 4 * Licensed under the GPL license: 5 * http://www.gnu.org/licenses/gpl.html 6 */ 7 (function($) { 8 9 $.fn.farbtastic = function (options) { 10 $.farbtastic(this, options); 11 return this; 12 }; 13 14 $.farbtastic = function (container, callback) { 15 var container = $(container).get(0); 16 return container.farbtastic || (container.farbtastic = new $._farbtastic(container, callback)); 17 }; 18 19 $._farbtastic = function (container, callback) { 20 // Store farbtastic object 21 var fb = this; 22 23 // Insert markup 24 $(container).html('<div class="farbtastic"><div class="color"></div><div class="wheel"></div><div class="overlay"></div><div class="h-marker marker"></div><div class="sl-marker marker"></div></div>'); 25 var e = $('.farbtastic', container); 26 fb.wheel = $('.wheel', container).get(0); 27 // Dimensions 28 fb.radius = 84; 29 fb.square = 100; 30 fb.width = 194; 31 32 // Fix background PNGs in IE6 33 if (navigator.appVersion.match(/MSIE [0-6]\./)) { 34 $('*', e).each(function () { 35 if (this.currentStyle.backgroundImage != 'none') { 36 var image = this.currentStyle.backgroundImage; 37 image = this.currentStyle.backgroundImage.substring(5, image.length - 2); 38 $(this).css({ 39 'backgroundImage': 'none', 40 'filter': "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=crop, src='" + image + "')" 41 }); 42 } 43 }); 44 } 45 46 /** 47 * Link to the given element(s) or callback. 48 */ 49 fb.linkTo = function (callback) { 50 // Unbind previous nodes 51 if (typeof fb.callback == 'object') { 52 $(fb.callback).unbind('keyup', fb.updateValue); 53 } 54 55 // Reset color 56 fb.color = null; 57 58 // Bind callback or elements 59 if (typeof callback == 'function') { 60 fb.callback = callback; 61 } 62 else if (typeof callback == 'object' || typeof callback == 'string') { 63 fb.callback = $(callback); 64 fb.callback.bind('keyup', fb.updateValue); 65 if (fb.callback.get(0).value) { 66 fb.setColor(fb.callback.get(0).value); 67 } 68 } 69 return this; 70 }; 71 fb.updateValue = function (event) { 72 if (this.value && this.value != fb.color) { 73 fb.setColor(this.value); 74 } 75 }; 76 77 /** 78 * Change color with HTML syntax #123456 79 */ 80 fb.setColor = function (color) { 81 var unpack = fb.unpack(color); 82 if (fb.color != color && unpack) { 83 fb.color = color; 84 fb.rgb = unpack; 85 fb.hsl = fb.RGBToHSL(fb.rgb); 86 fb.updateDisplay(); 87 } 88 return this; 89 }; 90 91 /** 92 * Change color with HSL triplet [0..1, 0..1, 0..1] 93 */ 94 fb.setHSL = function (hsl) { 95 fb.hsl = hsl; 96 fb.rgb = fb.HSLToRGB(hsl); 97 fb.color = fb.pack(fb.rgb); 98 fb.updateDisplay(); 99 return this; 100 }; 101 102 ///////////////////////////////////////////////////// 103 104 /** 105 * Retrieve the coordinates of the given event relative to the center 106 * of the widget. 107 */ 108 fb.widgetCoords = function (event) { 109 var offset = $(fb.wheel).offset(); 110 return { x: (event.pageX - offset.left) - fb.width / 2, y: (event.pageY - offset.top) - fb.width / 2 }; 111 }; 112 113 /** 114 * Mousedown handler 115 */ 116 fb.mousedown = function (event) { 117 // Capture mouse 118 if (!document.dragging) { 119 $(document).bind('mousemove', fb.mousemove).bind('mouseup', fb.mouseup); 120 document.dragging = true; 121 } 122 123 // Check which area is being dragged 124 var pos = fb.widgetCoords(event); 125 fb.circleDrag = Math.max(Math.abs(pos.x), Math.abs(pos.y)) * 2 > fb.square; 126 127 // Process 128 fb.mousemove(event); 129 return false; 130 }; 131 132 /** 133 * Mousemove handler 134 */ 135 fb.mousemove = function (event) { 136 // Get coordinates relative to color picker center 137 var pos = fb.widgetCoords(event); 138 139 // Set new HSL parameters 140 if (fb.circleDrag) { 141 var hue = Math.atan2(pos.x, -pos.y) / 6.28; 142 if (hue < 0) hue += 1; 143 fb.setHSL([hue, fb.hsl[1], fb.hsl[2]]); 144 } 145 else { 146 var sat = Math.max(0, Math.min(1, -(pos.x / fb.square) + .5)); 147 var lum = Math.max(0, Math.min(1, -(pos.y / fb.square) + .5)); 148 fb.setHSL([fb.hsl[0], sat, lum]); 149 } 150 return false; 151 }; 152 153 /** 154 * Mouseup handler 155 */ 156 fb.mouseup = function () { 157 // Uncapture mouse 158 $(document).unbind('mousemove', fb.mousemove); 159 $(document).unbind('mouseup', fb.mouseup); 160 document.dragging = false; 161 }; 162 163 /** 164 * Update the markers and styles 165 */ 166 fb.updateDisplay = function () { 167 // Markers 168 var angle = fb.hsl[0] * 6.28; 169 $('.h-marker', e).css({ 170 left: Math.round(Math.sin(angle) * fb.radius + fb.width / 2) + 'px', 171 top: Math.round(-Math.cos(angle) * fb.radius + fb.width / 2) + 'px' 172 }); 173 174 $('.sl-marker', e).css({ 175 left: Math.round(fb.square * (.5 - fb.hsl[1]) + fb.width / 2) + 'px', 176 top: Math.round(fb.square * (.5 - fb.hsl[2]) + fb.width / 2) + 'px' 177 }); 178 179 // Saturation/Luminance gradient 180 $('.color', e).css('backgroundColor', fb.pack(fb.HSLToRGB([fb.hsl[0], 1, 0.5]))); 181 182 // Linked elements or callback 183 if (typeof fb.callback == 'object') { 184 // Set background/foreground color 185 $(fb.callback).css({ 186 backgroundColor: fb.color, 187 color: fb.hsl[2] > 0.5 ? '#000' : '#fff' 188 }); 189 190 // Change linked value 191 $(fb.callback).each(function() { 192 if (this.value && this.value != fb.color) { 193 this.value = fb.color; 194 } 195 }); 196 } 197 else if (typeof fb.callback == 'function') { 198 fb.callback.call(fb, fb.color); 199 } 200 }; 201 202 /* Various color utility functions */ 203 fb.pack = function (rgb) { 204 var r = Math.round(rgb[0] * 255); 205 var g = Math.round(rgb[1] * 255); 206 var b = Math.round(rgb[2] * 255); 207 return '#' + (r < 16 ? '0' : '') + r.toString(16) + 208 (g < 16 ? '0' : '') + g.toString(16) + 209 (b < 16 ? '0' : '') + b.toString(16); 210 }; 211 212 fb.unpack = function (color) { 213 if (color.length == 7) { 214 return [parseInt('0x' + color.substring(1, 3)) / 255, 215 parseInt('0x' + color.substring(3, 5)) / 255, 216 parseInt('0x' + color.substring(5, 7)) / 255]; 217 } 218 else if (color.length == 4) { 219 return [parseInt('0x' + color.substring(1, 2)) / 15, 220 parseInt('0x' + color.substring(2, 3)) / 15, 221 parseInt('0x' + color.substring(3, 4)) / 15]; 222 } 223 }; 224 225 fb.HSLToRGB = function (hsl) { 226 var m1, m2, r, g, b; 227 var h = hsl[0], s = hsl[1], l = hsl[2]; 228 m2 = (l <= 0.5) ? l * (s + 1) : l + s - l*s; 229 m1 = l * 2 - m2; 230 return [this.hueToRGB(m1, m2, h+0.33333), 231 this.hueToRGB(m1, m2, h), 232 this.hueToRGB(m1, m2, h-0.33333)]; 233 }; 234 235 fb.hueToRGB = function (m1, m2, h) { 236 h = (h < 0) ? h + 1 : ((h > 1) ? h - 1 : h); 237 if (h * 6 < 1) return m1 + (m2 - m1) * h * 6; 238 if (h * 2 < 1) return m2; 239 if (h * 3 < 2) return m1 + (m2 - m1) * (0.66666 - h) * 6; 240 return m1; 241 }; 242 243 fb.RGBToHSL = function (rgb) { 244 var min, max, delta, h, s, l; 245 var r = rgb[0], g = rgb[1], b = rgb[2]; 246 min = Math.min(r, Math.min(g, b)); 247 max = Math.max(r, Math.max(g, b)); 248 delta = max - min; 249 l = (min + max) / 2; 250 s = 0; 251 if (l > 0 && l < 1) { 252 s = delta / (l < 0.5 ? (2 * l) : (2 - 2 * l)); 253 } 254 h = 0; 255 if (delta > 0) { 256 if (max == r && max != g) h += (g - b) / delta; 257 if (max == g && max != b) h += (2 + (b - r) / delta); 258 if (max == b && max != r) h += (4 + (r - g) / delta); 259 h /= 6; 260 } 261 return [h, s, l]; 262 }; 263 264 // Install mousedown handler (the others are set on the document on-demand) 265 $('*', e).mousedown(fb.mousedown); 266 267 // Init color 268 fb.setColor('#000000'); 269 270 // Set linked elements/callback 271 if (callback) { 272 fb.linkTo(callback); 273 } 274 }; 275 276 })(jQuery);