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annotate misc/farbtastic/farbtastic.js @ 7:fff6d4c8c043 6.3

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Drupal 6.3
author Franck Deroche <webmaster@defr.org>
date Tue, 23 Dec 2008 14:30:28 +0100
parents c1f4ac30525a
children
rev   line source
webmaster@7 1 // $Id: farbtastic.js,v 1.4.2.1 2008/06/25 09:34:17 goba Exp $
webmaster@1 2 // Farbtastic 1.2
webmaster@1 3
webmaster@1 4 jQuery.fn.farbtastic = function (callback) {
webmaster@1 5 $.farbtastic(this, callback);
webmaster@1 6 return this;
webmaster@1 7 };
webmaster@1 8
webmaster@1 9 jQuery.farbtastic = function (container, callback) {
webmaster@1 10 var container = $(container).get(0);
webmaster@1 11 return container.farbtastic || (container.farbtastic = new jQuery._farbtastic(container, callback));
webmaster@1 12 };
webmaster@1 13
webmaster@1 14 jQuery._farbtastic = function (container, callback) {
webmaster@1 15 // Store farbtastic object
webmaster@1 16 var fb = this;
webmaster@1 17
webmaster@1 18 // Insert markup
webmaster@1 19 $(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>');
webmaster@1 20 var e = $('.farbtastic', container);
webmaster@1 21 fb.wheel = $('.wheel', container).get(0);
webmaster@1 22 // Dimensions
webmaster@1 23 fb.radius = 84;
webmaster@1 24 fb.square = 100;
webmaster@1 25 fb.width = 194;
webmaster@1 26
webmaster@1 27 // Fix background PNGs in IE6
webmaster@1 28 if (navigator.appVersion.match(/MSIE [0-6]\./)) {
webmaster@1 29 $('*', e).each(function () {
webmaster@1 30 if (this.currentStyle.backgroundImage != 'none') {
webmaster@1 31 var image = this.currentStyle.backgroundImage;
webmaster@1 32 image = this.currentStyle.backgroundImage.substring(5, image.length - 2);
webmaster@1 33 $(this).css({
webmaster@1 34 'backgroundImage': 'none',
webmaster@1 35 'filter': "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=crop, src='" + image + "')"
webmaster@1 36 });
webmaster@1 37 }
webmaster@1 38 });
webmaster@1 39 }
webmaster@1 40
webmaster@1 41 /**
webmaster@1 42 * Link to the given element(s) or callback.
webmaster@1 43 */
webmaster@1 44 fb.linkTo = function (callback) {
webmaster@1 45 // Unbind previous nodes
webmaster@1 46 if (typeof fb.callback == 'object') {
webmaster@1 47 $(fb.callback).unbind('keyup', fb.updateValue);
webmaster@1 48 }
webmaster@1 49
webmaster@1 50 // Reset color
webmaster@1 51 fb.color = null;
webmaster@1 52
webmaster@1 53 // Bind callback or elements
webmaster@1 54 if (typeof callback == 'function') {
webmaster@1 55 fb.callback = callback;
webmaster@1 56 }
webmaster@1 57 else if (typeof callback == 'object' || typeof callback == 'string') {
webmaster@1 58 fb.callback = $(callback);
webmaster@1 59 fb.callback.bind('keyup', fb.updateValue);
webmaster@1 60 if (fb.callback.get(0).value) {
webmaster@1 61 fb.setColor(fb.callback.get(0).value);
webmaster@1 62 }
webmaster@1 63 }
webmaster@1 64 return this;
webmaster@1 65 };
webmaster@1 66 fb.updateValue = function (event) {
webmaster@1 67 if (this.value && this.value != fb.color) {
webmaster@1 68 fb.setColor(this.value);
webmaster@1 69 }
webmaster@1 70 };
webmaster@1 71
webmaster@1 72 /**
webmaster@1 73 * Change color with HTML syntax #123456
webmaster@1 74 */
webmaster@1 75 fb.setColor = function (color) {
webmaster@1 76 var unpack = fb.unpack(color);
webmaster@1 77 if (fb.color != color && unpack) {
webmaster@1 78 fb.color = color;
webmaster@1 79 fb.rgb = unpack;
webmaster@1 80 fb.hsl = fb.RGBToHSL(fb.rgb);
webmaster@1 81 fb.updateDisplay();
webmaster@1 82 }
webmaster@1 83 return this;
webmaster@1 84 };
webmaster@1 85
webmaster@1 86 /**
webmaster@1 87 * Change color with HSL triplet [0..1, 0..1, 0..1]
webmaster@1 88 */
webmaster@1 89 fb.setHSL = function (hsl) {
webmaster@1 90 fb.hsl = hsl;
webmaster@1 91 fb.rgb = fb.HSLToRGB(hsl);
webmaster@1 92 fb.color = fb.pack(fb.rgb);
webmaster@1 93 fb.updateDisplay();
webmaster@1 94 return this;
webmaster@1 95 };
webmaster@1 96
webmaster@1 97 /////////////////////////////////////////////////////
webmaster@1 98
webmaster@1 99 /**
webmaster@1 100 * Retrieve the coordinates of the given event relative to the center
webmaster@1 101 * of the widget.
webmaster@1 102 */
webmaster@1 103 fb.widgetCoords = function (event) {
webmaster@1 104 var x, y;
webmaster@1 105 var el = event.target || event.srcElement;
webmaster@1 106 var reference = fb.wheel;
webmaster@7 107
webmaster@7 108 // If the offset from the relative element is undefined calculate it.
webmaster@7 109 if ( typeof event.offsetX == 'undefined' && typeof event.offsetY == 'undefined' ) {
webmaster@7 110 var offset = $(event.target).offset(false);
webmaster@7 111 event.offsetX = event.pageX - offset.left;
webmaster@7 112 event.offsetY = event.pageY - offset.top;
webmaster@7 113 }
webmaster@7 114
webmaster@7 115 // Use offset coordinates and find common offsetParent
webmaster@7 116 var pos = { x: event.offsetX, y: event.offsetY };
webmaster@1 117
webmaster@7 118 // Send the coordinates upwards through the offsetParent chain.
webmaster@7 119 var e = el;
webmaster@7 120 while (e) {
webmaster@7 121 e.mouseX = pos.x;
webmaster@7 122 e.mouseY = pos.y;
webmaster@7 123 pos.x += e.offsetLeft;
webmaster@7 124 pos.y += e.offsetTop;
webmaster@7 125 e = e.offsetParent;
webmaster@7 126 }
webmaster@1 127
webmaster@7 128 // Look for the coordinates starting from the wheel widget.
webmaster@7 129 var e = reference;
webmaster@7 130 var offset = { x: 0, y: 0 };
webmaster@7 131 while (e) {
webmaster@7 132 if (typeof e.mouseX != 'undefined') {
webmaster@7 133 x = e.mouseX - offset.x;
webmaster@7 134 y = e.mouseY - offset.y;
webmaster@7 135 break;
webmaster@1 136 }
webmaster@7 137 offset.x += e.offsetLeft;
webmaster@7 138 offset.y += e.offsetTop;
webmaster@7 139 e = e.offsetParent;
webmaster@7 140 }
webmaster@1 141
webmaster@7 142 // Reset stored coordinates
webmaster@7 143 e = el;
webmaster@7 144 while (e) {
webmaster@7 145 e.mouseX = undefined;
webmaster@7 146 e.mouseY = undefined;
webmaster@7 147 e = e.offsetParent;
webmaster@7 148 }
webmaster@1 149
webmaster@1 150 // Subtract distance to middle
webmaster@1 151 return { x: x - fb.width / 2, y: y - fb.width / 2 };
webmaster@1 152 };
webmaster@1 153
webmaster@1 154 /**
webmaster@1 155 * Mousedown handler
webmaster@1 156 */
webmaster@1 157 fb.mousedown = function (event) {
webmaster@1 158 // Capture mouse
webmaster@1 159 if (!document.dragging) {
webmaster@1 160 $(document).bind('mousemove', fb.mousemove).bind('mouseup', fb.mouseup);
webmaster@1 161 document.dragging = true;
webmaster@1 162 }
webmaster@1 163
webmaster@1 164 // Check which area is being dragged
webmaster@1 165 var pos = fb.widgetCoords(event);
webmaster@1 166 fb.circleDrag = Math.max(Math.abs(pos.x), Math.abs(pos.y)) * 2 > fb.square;
webmaster@1 167
webmaster@1 168 // Process
webmaster@1 169 fb.mousemove(event);
webmaster@1 170 return false;
webmaster@1 171 };
webmaster@1 172
webmaster@1 173 /**
webmaster@1 174 * Mousemove handler
webmaster@1 175 */
webmaster@1 176 fb.mousemove = function (event) {
webmaster@1 177 // Get coordinates relative to color picker center
webmaster@1 178 var pos = fb.widgetCoords(event);
webmaster@1 179
webmaster@1 180 // Set new HSL parameters
webmaster@1 181 if (fb.circleDrag) {
webmaster@1 182 var hue = Math.atan2(pos.x, -pos.y) / 6.28;
webmaster@1 183 if (hue < 0) hue += 1;
webmaster@1 184 fb.setHSL([hue, fb.hsl[1], fb.hsl[2]]);
webmaster@1 185 }
webmaster@1 186 else {
webmaster@1 187 var sat = Math.max(0, Math.min(1, -(pos.x / fb.square) + .5));
webmaster@1 188 var lum = Math.max(0, Math.min(1, -(pos.y / fb.square) + .5));
webmaster@1 189 fb.setHSL([fb.hsl[0], sat, lum]);
webmaster@1 190 }
webmaster@1 191 return false;
webmaster@1 192 };
webmaster@1 193
webmaster@1 194 /**
webmaster@1 195 * Mouseup handler
webmaster@1 196 */
webmaster@1 197 fb.mouseup = function () {
webmaster@1 198 // Uncapture mouse
webmaster@1 199 $(document).unbind('mousemove', fb.mousemove);
webmaster@1 200 $(document).unbind('mouseup', fb.mouseup);
webmaster@1 201 document.dragging = false;
webmaster@1 202 };
webmaster@1 203
webmaster@1 204 /**
webmaster@1 205 * Update the markers and styles
webmaster@1 206 */
webmaster@1 207 fb.updateDisplay = function () {
webmaster@1 208 // Markers
webmaster@1 209 var angle = fb.hsl[0] * 6.28;
webmaster@1 210 $('.h-marker', e).css({
webmaster@1 211 left: Math.round(Math.sin(angle) * fb.radius + fb.width / 2) + 'px',
webmaster@1 212 top: Math.round(-Math.cos(angle) * fb.radius + fb.width / 2) + 'px'
webmaster@1 213 });
webmaster@1 214
webmaster@1 215 $('.sl-marker', e).css({
webmaster@1 216 left: Math.round(fb.square * (.5 - fb.hsl[1]) + fb.width / 2) + 'px',
webmaster@1 217 top: Math.round(fb.square * (.5 - fb.hsl[2]) + fb.width / 2) + 'px'
webmaster@1 218 });
webmaster@1 219
webmaster@1 220 // Saturation/Luminance gradient
webmaster@1 221 $('.color', e).css('backgroundColor', fb.pack(fb.HSLToRGB([fb.hsl[0], 1, 0.5])));
webmaster@1 222
webmaster@1 223 // Linked elements or callback
webmaster@1 224 if (typeof fb.callback == 'object') {
webmaster@1 225 // Set background/foreground color
webmaster@1 226 $(fb.callback).css({
webmaster@1 227 backgroundColor: fb.color,
webmaster@1 228 color: fb.hsl[2] > 0.5 ? '#000' : '#fff'
webmaster@1 229 });
webmaster@1 230
webmaster@1 231 // Change linked value
webmaster@1 232 $(fb.callback).each(function() {
webmaster@1 233 if (this.value && this.value != fb.color) {
webmaster@1 234 this.value = fb.color;
webmaster@1 235 }
webmaster@1 236 });
webmaster@1 237 }
webmaster@1 238 else if (typeof fb.callback == 'function') {
webmaster@1 239 fb.callback.call(fb, fb.color);
webmaster@1 240 }
webmaster@1 241 };
webmaster@1 242
webmaster@1 243 /* Various color utility functions */
webmaster@1 244 fb.pack = function (rgb) {
webmaster@1 245 var r = Math.round(rgb[0] * 255);
webmaster@1 246 var g = Math.round(rgb[1] * 255);
webmaster@1 247 var b = Math.round(rgb[2] * 255);
webmaster@1 248 return '#' + (r < 16 ? '0' : '') + r.toString(16) +
webmaster@1 249 (g < 16 ? '0' : '') + g.toString(16) +
webmaster@1 250 (b < 16 ? '0' : '') + b.toString(16);
webmaster@1 251 };
webmaster@1 252
webmaster@1 253 fb.unpack = function (color) {
webmaster@1 254 if (color.length == 7) {
webmaster@1 255 return [parseInt('0x' + color.substring(1, 3)) / 255,
webmaster@1 256 parseInt('0x' + color.substring(3, 5)) / 255,
webmaster@1 257 parseInt('0x' + color.substring(5, 7)) / 255];
webmaster@1 258 }
webmaster@1 259 else if (color.length == 4) {
webmaster@1 260 return [parseInt('0x' + color.substring(1, 2)) / 15,
webmaster@1 261 parseInt('0x' + color.substring(2, 3)) / 15,
webmaster@1 262 parseInt('0x' + color.substring(3, 4)) / 15];
webmaster@1 263 }
webmaster@1 264 };
webmaster@1 265
webmaster@1 266 fb.HSLToRGB = function (hsl) {
webmaster@1 267 var m1, m2, r, g, b;
webmaster@1 268 var h = hsl[0], s = hsl[1], l = hsl[2];
webmaster@1 269 m2 = (l <= 0.5) ? l * (s + 1) : l + s - l*s;
webmaster@1 270 m1 = l * 2 - m2;
webmaster@1 271 return [this.hueToRGB(m1, m2, h+0.33333),
webmaster@1 272 this.hueToRGB(m1, m2, h),
webmaster@1 273 this.hueToRGB(m1, m2, h-0.33333)];
webmaster@1 274 };
webmaster@1 275
webmaster@1 276 fb.hueToRGB = function (m1, m2, h) {
webmaster@1 277 h = (h < 0) ? h + 1 : ((h > 1) ? h - 1 : h);
webmaster@1 278 if (h * 6 < 1) return m1 + (m2 - m1) * h * 6;
webmaster@1 279 if (h * 2 < 1) return m2;
webmaster@1 280 if (h * 3 < 2) return m1 + (m2 - m1) * (0.66666 - h) * 6;
webmaster@1 281 return m1;
webmaster@1 282 };
webmaster@1 283
webmaster@1 284 fb.RGBToHSL = function (rgb) {
webmaster@1 285 var min, max, delta, h, s, l;
webmaster@1 286 var r = rgb[0], g = rgb[1], b = rgb[2];
webmaster@1 287 min = Math.min(r, Math.min(g, b));
webmaster@1 288 max = Math.max(r, Math.max(g, b));
webmaster@1 289 delta = max - min;
webmaster@1 290 l = (min + max) / 2;
webmaster@1 291 s = 0;
webmaster@1 292 if (l > 0 && l < 1) {
webmaster@1 293 s = delta / (l < 0.5 ? (2 * l) : (2 - 2 * l));
webmaster@1 294 }
webmaster@1 295 h = 0;
webmaster@1 296 if (delta > 0) {
webmaster@1 297 if (max == r && max != g) h += (g - b) / delta;
webmaster@1 298 if (max == g && max != b) h += (2 + (b - r) / delta);
webmaster@1 299 if (max == b && max != r) h += (4 + (r - g) / delta);
webmaster@1 300 h /= 6;
webmaster@1 301 }
webmaster@1 302 return [h, s, l];
webmaster@1 303 };
webmaster@1 304
webmaster@1 305 // Install mousedown handler (the others are set on the document on-demand)
webmaster@1 306 $('*', e).mousedown(fb.mousedown);
webmaster@1 307
webmaster@1 308 // Init color
webmaster@1 309 fb.setColor('#000000');
webmaster@1 310
webmaster@1 311 // Set linked elements/callback
webmaster@1 312 if (callback) {
webmaster@1 313 fb.linkTo(callback);
webmaster@1 314 }
webmaster@1 315 };