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comparison misc/farbtastic/farbtastic.js @ 1:c1f4ac30525a 6.0

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Drupal 6.0
author Franck Deroche <webmaster@defr.org>
date Tue, 23 Dec 2008 14:28:28 +0100
parents
children fff6d4c8c043
comparison
equal deleted inserted replaced
0:5a113a1c4740 1:c1f4ac30525a
1 // $Id: farbtastic.js,v 1.4 2007/06/01 09:05:45 unconed Exp $
2 // Farbtastic 1.2
3
4 jQuery.fn.farbtastic = function (callback) {
5 $.farbtastic(this, callback);
6 return this;
7 };
8
9 jQuery.farbtastic = function (container, callback) {
10 var container = $(container).get(0);
11 return container.farbtastic || (container.farbtastic = new jQuery._farbtastic(container, callback));
12 };
13
14 jQuery._farbtastic = function (container, callback) {
15 // Store farbtastic object
16 var fb = this;
17
18 // Insert markup
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>');
20 var e = $('.farbtastic', container);
21 fb.wheel = $('.wheel', container).get(0);
22 // Dimensions
23 fb.radius = 84;
24 fb.square = 100;
25 fb.width = 194;
26
27 // Fix background PNGs in IE6
28 if (navigator.appVersion.match(/MSIE [0-6]\./)) {
29 $('*', e).each(function () {
30 if (this.currentStyle.backgroundImage != 'none') {
31 var image = this.currentStyle.backgroundImage;
32 image = this.currentStyle.backgroundImage.substring(5, image.length - 2);
33 $(this).css({
34 'backgroundImage': 'none',
35 'filter': "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=crop, src='" + image + "')"
36 });
37 }
38 });
39 }
40
41 /**
42 * Link to the given element(s) or callback.
43 */
44 fb.linkTo = function (callback) {
45 // Unbind previous nodes
46 if (typeof fb.callback == 'object') {
47 $(fb.callback).unbind('keyup', fb.updateValue);
48 }
49
50 // Reset color
51 fb.color = null;
52
53 // Bind callback or elements
54 if (typeof callback == 'function') {
55 fb.callback = callback;
56 }
57 else if (typeof callback == 'object' || typeof callback == 'string') {
58 fb.callback = $(callback);
59 fb.callback.bind('keyup', fb.updateValue);
60 if (fb.callback.get(0).value) {
61 fb.setColor(fb.callback.get(0).value);
62 }
63 }
64 return this;
65 };
66 fb.updateValue = function (event) {
67 if (this.value && this.value != fb.color) {
68 fb.setColor(this.value);
69 }
70 };
71
72 /**
73 * Change color with HTML syntax #123456
74 */
75 fb.setColor = function (color) {
76 var unpack = fb.unpack(color);
77 if (fb.color != color && unpack) {
78 fb.color = color;
79 fb.rgb = unpack;
80 fb.hsl = fb.RGBToHSL(fb.rgb);
81 fb.updateDisplay();
82 }
83 return this;
84 };
85
86 /**
87 * Change color with HSL triplet [0..1, 0..1, 0..1]
88 */
89 fb.setHSL = function (hsl) {
90 fb.hsl = hsl;
91 fb.rgb = fb.HSLToRGB(hsl);
92 fb.color = fb.pack(fb.rgb);
93 fb.updateDisplay();
94 return this;
95 };
96
97 /////////////////////////////////////////////////////
98
99 /**
100 * Retrieve the coordinates of the given event relative to the center
101 * of the widget.
102 */
103 fb.widgetCoords = function (event) {
104 var x, y;
105 var el = event.target || event.srcElement;
106 var reference = fb.wheel;
107
108 if (typeof event.offsetX != 'undefined') {
109 // Use offset coordinates and find common offsetParent
110 var pos = { x: event.offsetX, y: event.offsetY };
111
112 // Send the coordinates upwards through the offsetParent chain.
113 var e = el;
114 while (e) {
115 e.mouseX = pos.x;
116 e.mouseY = pos.y;
117 pos.x += e.offsetLeft;
118 pos.y += e.offsetTop;
119 e = e.offsetParent;
120 }
121
122 // Look for the coordinates starting from the wheel widget.
123 var e = reference;
124 var offset = { x: 0, y: 0 };
125 while (e) {
126 if (typeof e.mouseX != 'undefined') {
127 x = e.mouseX - offset.x;
128 y = e.mouseY - offset.y;
129 break;
130 }
131 offset.x += e.offsetLeft;
132 offset.y += e.offsetTop;
133 e = e.offsetParent;
134 }
135
136 // Reset stored coordinates
137 e = el;
138 while (e) {
139 e.mouseX = undefined;
140 e.mouseY = undefined;
141 e = e.offsetParent;
142 }
143 }
144 else {
145 // Use absolute coordinates
146 var pos = fb.absolutePosition(reference);
147 x = (event.pageX || 0*(event.clientX + $('html').get(0).scrollLeft)) - pos.x;
148 y = (event.pageY || 0*(event.clientY + $('html').get(0).scrollTop)) - pos.y;
149 }
150 // Subtract distance to middle
151 return { x: x - fb.width / 2, y: y - fb.width / 2 };
152 };
153
154 /**
155 * Mousedown handler
156 */
157 fb.mousedown = function (event) {
158 // Capture mouse
159 if (!document.dragging) {
160 $(document).bind('mousemove', fb.mousemove).bind('mouseup', fb.mouseup);
161 document.dragging = true;
162 }
163
164 // Check which area is being dragged
165 var pos = fb.widgetCoords(event);
166 fb.circleDrag = Math.max(Math.abs(pos.x), Math.abs(pos.y)) * 2 > fb.square;
167
168 // Process
169 fb.mousemove(event);
170 return false;
171 };
172
173 /**
174 * Mousemove handler
175 */
176 fb.mousemove = function (event) {
177 // Get coordinates relative to color picker center
178 var pos = fb.widgetCoords(event);
179
180 // Set new HSL parameters
181 if (fb.circleDrag) {
182 var hue = Math.atan2(pos.x, -pos.y) / 6.28;
183 if (hue < 0) hue += 1;
184 fb.setHSL([hue, fb.hsl[1], fb.hsl[2]]);
185 }
186 else {
187 var sat = Math.max(0, Math.min(1, -(pos.x / fb.square) + .5));
188 var lum = Math.max(0, Math.min(1, -(pos.y / fb.square) + .5));
189 fb.setHSL([fb.hsl[0], sat, lum]);
190 }
191 return false;
192 };
193
194 /**
195 * Mouseup handler
196 */
197 fb.mouseup = function () {
198 // Uncapture mouse
199 $(document).unbind('mousemove', fb.mousemove);
200 $(document).unbind('mouseup', fb.mouseup);
201 document.dragging = false;
202 };
203
204 /**
205 * Update the markers and styles
206 */
207 fb.updateDisplay = function () {
208 // Markers
209 var angle = fb.hsl[0] * 6.28;
210 $('.h-marker', e).css({
211 left: Math.round(Math.sin(angle) * fb.radius + fb.width / 2) + 'px',
212 top: Math.round(-Math.cos(angle) * fb.radius + fb.width / 2) + 'px'
213 });
214
215 $('.sl-marker', e).css({
216 left: Math.round(fb.square * (.5 - fb.hsl[1]) + fb.width / 2) + 'px',
217 top: Math.round(fb.square * (.5 - fb.hsl[2]) + fb.width / 2) + 'px'
218 });
219
220 // Saturation/Luminance gradient
221 $('.color', e).css('backgroundColor', fb.pack(fb.HSLToRGB([fb.hsl[0], 1, 0.5])));
222
223 // Linked elements or callback
224 if (typeof fb.callback == 'object') {
225 // Set background/foreground color
226 $(fb.callback).css({
227 backgroundColor: fb.color,
228 color: fb.hsl[2] > 0.5 ? '#000' : '#fff'
229 });
230
231 // Change linked value
232 $(fb.callback).each(function() {
233 if (this.value && this.value != fb.color) {
234 this.value = fb.color;
235 }
236 });
237 }
238 else if (typeof fb.callback == 'function') {
239 fb.callback.call(fb, fb.color);
240 }
241 };
242
243 /**
244 * Get absolute position of element
245 */
246 fb.absolutePosition = function (el) {
247 var r = { x: el.offsetLeft, y: el.offsetTop };
248 // Resolve relative to offsetParent
249 if (el.offsetParent) {
250 var tmp = fb.absolutePosition(el.offsetParent);
251 r.x += tmp.x;
252 r.y += tmp.y;
253 }
254 return r;
255 };
256
257 /* Various color utility functions */
258 fb.pack = function (rgb) {
259 var r = Math.round(rgb[0] * 255);
260 var g = Math.round(rgb[1] * 255);
261 var b = Math.round(rgb[2] * 255);
262 return '#' + (r < 16 ? '0' : '') + r.toString(16) +
263 (g < 16 ? '0' : '') + g.toString(16) +
264 (b < 16 ? '0' : '') + b.toString(16);
265 };
266
267 fb.unpack = function (color) {
268 if (color.length == 7) {
269 return [parseInt('0x' + color.substring(1, 3)) / 255,
270 parseInt('0x' + color.substring(3, 5)) / 255,
271 parseInt('0x' + color.substring(5, 7)) / 255];
272 }
273 else if (color.length == 4) {
274 return [parseInt('0x' + color.substring(1, 2)) / 15,
275 parseInt('0x' + color.substring(2, 3)) / 15,
276 parseInt('0x' + color.substring(3, 4)) / 15];
277 }
278 };
279
280 fb.HSLToRGB = function (hsl) {
281 var m1, m2, r, g, b;
282 var h = hsl[0], s = hsl[1], l = hsl[2];
283 m2 = (l <= 0.5) ? l * (s + 1) : l + s - l*s;
284 m1 = l * 2 - m2;
285 return [this.hueToRGB(m1, m2, h+0.33333),
286 this.hueToRGB(m1, m2, h),
287 this.hueToRGB(m1, m2, h-0.33333)];
288 };
289
290 fb.hueToRGB = function (m1, m2, h) {
291 h = (h < 0) ? h + 1 : ((h > 1) ? h - 1 : h);
292 if (h * 6 < 1) return m1 + (m2 - m1) * h * 6;
293 if (h * 2 < 1) return m2;
294 if (h * 3 < 2) return m1 + (m2 - m1) * (0.66666 - h) * 6;
295 return m1;
296 };
297
298 fb.RGBToHSL = function (rgb) {
299 var min, max, delta, h, s, l;
300 var r = rgb[0], g = rgb[1], b = rgb[2];
301 min = Math.min(r, Math.min(g, b));
302 max = Math.max(r, Math.max(g, b));
303 delta = max - min;
304 l = (min + max) / 2;
305 s = 0;
306 if (l > 0 && l < 1) {
307 s = delta / (l < 0.5 ? (2 * l) : (2 - 2 * l));
308 }
309 h = 0;
310 if (delta > 0) {
311 if (max == r && max != g) h += (g - b) / delta;
312 if (max == g && max != b) h += (2 + (b - r) / delta);
313 if (max == b && max != r) h += (4 + (r - g) / delta);
314 h /= 6;
315 }
316 return [h, s, l];
317 };
318
319 // Install mousedown handler (the others are set on the document on-demand)
320 $('*', e).mousedown(fb.mousedown);
321
322 // Init color
323 fb.setColor('#000000');
324
325 // Set linked elements/callback
326 if (callback) {
327 fb.linkTo(callback);
328 }
329 };