提交 | 用户 | age
|
a6a76f
|
1 |
/** |
F |
2 |
* Farbtastic Color Picker 1.2 |
|
3 |
* © 2008 Steven Wittens |
|
4 |
* |
|
5 |
* This program is free software; you can redistribute it and/or modify |
|
6 |
* it under the terms of the GNU General Public License as published by |
|
7 |
* the Free Software Foundation; either version 2 of the License, or |
|
8 |
* (at your option) any later version. |
|
9 |
* |
|
10 |
* This program is distributed in the hope that it will be useful, |
|
11 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
12 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
13 |
* GNU General Public License for more details. |
|
14 |
* |
|
15 |
* You should have received a copy of the GNU General Public License |
|
16 |
* along with this program; if not, write to the Free Software |
|
17 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
18 |
*/ |
|
19 |
|
|
20 |
jQuery.fn.farbtastic = function (callback) { |
|
21 |
$.farbtastic(this, callback); |
|
22 |
return this; |
|
23 |
}; |
|
24 |
|
|
25 |
jQuery.farbtastic = function (container, callback) { |
|
26 |
var container = $(container).get(0); |
|
27 |
return container.farbtastic || (container.farbtastic = new jQuery._farbtastic(container, callback)); |
|
28 |
} |
|
29 |
|
|
30 |
jQuery._farbtastic = function (container, callback) { |
|
31 |
// Store farbtastic object |
|
32 |
var fb = this; |
|
33 |
|
|
34 |
// Insert markup |
|
35 |
$(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>'); |
|
36 |
var e = $('.farbtastic', container); |
|
37 |
fb.wheel = $('.wheel', container).get(0); |
|
38 |
// Dimensions |
|
39 |
fb.radius = 84; |
|
40 |
fb.square = 100; |
|
41 |
fb.width = 194; |
|
42 |
|
|
43 |
// Fix background PNGs in IE6 |
|
44 |
if (navigator.appVersion.match(/MSIE [0-6]\./)) { |
|
45 |
$('*', e).each(function () { |
|
46 |
if (this.currentStyle.backgroundImage != 'none') { |
|
47 |
var image = this.currentStyle.backgroundImage; |
|
48 |
image = this.currentStyle.backgroundImage.substring(5, image.length - 2); |
|
49 |
$(this).css({ |
|
50 |
'backgroundImage': 'none', |
|
51 |
'filter': "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=crop, src='" + image + "')" |
|
52 |
}); |
|
53 |
} |
|
54 |
}); |
|
55 |
} |
|
56 |
|
|
57 |
/** |
|
58 |
* Link to the given element(s) or callback. |
|
59 |
*/ |
|
60 |
fb.linkTo = function (callback) { |
|
61 |
// Unbind previous nodes |
|
62 |
if (typeof fb.callback == 'object') { |
|
63 |
$(fb.callback).unbind('keyup', fb.updateValue); |
|
64 |
} |
|
65 |
|
|
66 |
// Reset color |
|
67 |
fb.color = null; |
|
68 |
|
|
69 |
// Bind callback or elements |
|
70 |
if (typeof callback == 'function') { |
|
71 |
fb.callback = callback; |
|
72 |
} |
|
73 |
else if (typeof callback == 'object' || typeof callback == 'string') { |
|
74 |
fb.callback = $(callback); |
|
75 |
fb.callback.bind('keyup', fb.updateValue); |
|
76 |
if (fb.callback.get(0).value) { |
|
77 |
fb.setColor(fb.callback.get(0).value); |
|
78 |
} |
|
79 |
} |
|
80 |
return this; |
|
81 |
} |
|
82 |
fb.updateValue = function (event) { |
|
83 |
if (this.value && this.value != fb.color) { |
|
84 |
fb.setColor(this.value); |
|
85 |
} |
|
86 |
} |
|
87 |
|
|
88 |
/** |
|
89 |
* Change color with HTML syntax #123456 |
|
90 |
*/ |
|
91 |
fb.setColor = function (color) { |
|
92 |
var unpack = fb.unpack(color); |
|
93 |
if (fb.color != color && unpack) { |
|
94 |
fb.color = color; |
|
95 |
fb.rgb = unpack; |
|
96 |
fb.hsl = fb.RGBToHSL(fb.rgb); |
|
97 |
fb.updateDisplay(); |
|
98 |
} |
|
99 |
return this; |
|
100 |
} |
|
101 |
|
|
102 |
/** |
|
103 |
* Change color with HSL triplet [0..1, 0..1, 0..1] |
|
104 |
*/ |
|
105 |
fb.setHSL = function (hsl) { |
|
106 |
fb.hsl = hsl; |
|
107 |
fb.rgb = fb.HSLToRGB(hsl); |
|
108 |
fb.color = fb.pack(fb.rgb); |
|
109 |
fb.updateDisplay(); |
|
110 |
return this; |
|
111 |
} |
|
112 |
|
|
113 |
///////////////////////////////////////////////////// |
|
114 |
|
|
115 |
/** |
|
116 |
* Retrieve the coordinates of the given event relative to the center |
|
117 |
* of the widget. |
|
118 |
*/ |
|
119 |
fb.widgetCoords = function (event) { |
|
120 |
var x, y; |
|
121 |
var el = event.target || event.srcElement; |
|
122 |
var reference = fb.wheel; |
|
123 |
|
|
124 |
if (typeof event.offsetX != 'undefined') { |
|
125 |
// Use offset coordinates and find common offsetParent |
|
126 |
var pos = { x: event.offsetX, y: event.offsetY }; |
|
127 |
|
|
128 |
// Send the coordinates upwards through the offsetParent chain. |
|
129 |
var e = el; |
|
130 |
while (e) { |
|
131 |
e.mouseX = pos.x; |
|
132 |
e.mouseY = pos.y; |
|
133 |
pos.x += e.offsetLeft; |
|
134 |
pos.y += e.offsetTop; |
|
135 |
e = e.offsetParent; |
|
136 |
} |
|
137 |
|
|
138 |
// Look for the coordinates starting from the wheel widget. |
|
139 |
var e = reference; |
|
140 |
var offset = { x: 0, y: 0 } |
|
141 |
while (e) { |
|
142 |
if (typeof e.mouseX != 'undefined') { |
|
143 |
x = e.mouseX - offset.x; |
|
144 |
y = e.mouseY - offset.y; |
|
145 |
break; |
|
146 |
} |
|
147 |
offset.x += e.offsetLeft; |
|
148 |
offset.y += e.offsetTop; |
|
149 |
e = e.offsetParent; |
|
150 |
} |
|
151 |
|
|
152 |
// Reset stored coordinates |
|
153 |
e = el; |
|
154 |
while (e) { |
|
155 |
e.mouseX = undefined; |
|
156 |
e.mouseY = undefined; |
|
157 |
e = e.offsetParent; |
|
158 |
} |
|
159 |
} |
|
160 |
else { |
|
161 |
// Use absolute coordinates |
|
162 |
var pos = fb.absolutePosition(reference); |
|
163 |
x = (event.pageX || 0*(event.clientX + $('html').get(0).scrollLeft)) - pos.x; |
|
164 |
y = (event.pageY || 0*(event.clientY + $('html').get(0).scrollTop)) - pos.y; |
|
165 |
} |
|
166 |
// Subtract distance to middle |
|
167 |
return { x: x - fb.width / 2, y: y - fb.width / 2 }; |
|
168 |
} |
|
169 |
|
|
170 |
/** |
|
171 |
* Mousedown handler |
|
172 |
*/ |
|
173 |
fb.mousedown = function (event) { |
|
174 |
// Capture mouse |
|
175 |
if (!document.dragging) { |
|
176 |
$(document).bind('mousemove', fb.mousemove).bind('mouseup', fb.mouseup); |
|
177 |
document.dragging = true; |
|
178 |
} |
|
179 |
|
|
180 |
// Check which area is being dragged |
|
181 |
var pos = fb.widgetCoords(event); |
|
182 |
fb.circleDrag = Math.max(Math.abs(pos.x), Math.abs(pos.y)) * 2 > fb.square; |
|
183 |
|
|
184 |
// Process |
|
185 |
fb.mousemove(event); |
|
186 |
return false; |
|
187 |
} |
|
188 |
|
|
189 |
/** |
|
190 |
* Mousemove handler |
|
191 |
*/ |
|
192 |
fb.mousemove = function (event) { |
|
193 |
// Get coordinates relative to color picker center |
|
194 |
var pos = fb.widgetCoords(event); |
|
195 |
|
|
196 |
// Set new HSL parameters |
|
197 |
if (fb.circleDrag) { |
|
198 |
var hue = Math.atan2(pos.x, -pos.y) / 6.28; |
|
199 |
if (hue < 0) hue += 1; |
|
200 |
fb.setHSL([hue, fb.hsl[1], fb.hsl[2]]); |
|
201 |
} |
|
202 |
else { |
|
203 |
var sat = Math.max(0, Math.min(1, -(pos.x / fb.square) + .5)); |
|
204 |
var lum = Math.max(0, Math.min(1, -(pos.y / fb.square) + .5)); |
|
205 |
fb.setHSL([fb.hsl[0], sat, lum]); |
|
206 |
} |
|
207 |
return false; |
|
208 |
} |
|
209 |
|
|
210 |
/** |
|
211 |
* Mouseup handler |
|
212 |
*/ |
|
213 |
fb.mouseup = function () { |
|
214 |
// Uncapture mouse |
|
215 |
$(document).unbind('mousemove', fb.mousemove); |
|
216 |
$(document).unbind('mouseup', fb.mouseup); |
|
217 |
document.dragging = false; |
|
218 |
} |
|
219 |
|
|
220 |
/** |
|
221 |
* Update the markers and styles |
|
222 |
*/ |
|
223 |
fb.updateDisplay = function () { |
|
224 |
// Markers |
|
225 |
var angle = fb.hsl[0] * 6.28; |
|
226 |
$('.h-marker', e).css({ |
|
227 |
left: Math.round(Math.sin(angle) * fb.radius + fb.width / 2) + 'px', |
|
228 |
top: Math.round(-Math.cos(angle) * fb.radius + fb.width / 2) + 'px' |
|
229 |
}); |
|
230 |
|
|
231 |
$('.sl-marker', e).css({ |
|
232 |
left: Math.round(fb.square * (.5 - fb.hsl[1]) + fb.width / 2) + 'px', |
|
233 |
top: Math.round(fb.square * (.5 - fb.hsl[2]) + fb.width / 2) + 'px' |
|
234 |
}); |
|
235 |
|
|
236 |
// Saturation/Luminance gradient |
|
237 |
$('.color', e).css('backgroundColor', fb.pack(fb.HSLToRGB([fb.hsl[0], 1, 0.5]))); |
|
238 |
|
|
239 |
// Linked elements or callback |
|
240 |
if (typeof fb.callback == 'object') { |
|
241 |
// Set background/foreground color |
|
242 |
$(fb.callback).css({ |
|
243 |
backgroundColor: fb.color, |
|
244 |
color: fb.hsl[2] > 0.5 ? '#000' : '#fff' |
|
245 |
}); |
|
246 |
|
|
247 |
// Change linked value |
|
248 |
$(fb.callback).each(function() { |
|
249 |
if (this.value && this.value != fb.color) { |
|
250 |
this.value = fb.color; |
|
251 |
} |
|
252 |
}); |
|
253 |
} |
|
254 |
else if (typeof fb.callback == 'function') { |
|
255 |
fb.callback.call(fb, fb.color); |
|
256 |
} |
|
257 |
} |
|
258 |
|
|
259 |
/** |
|
260 |
* Get absolute position of element |
|
261 |
*/ |
|
262 |
fb.absolutePosition = function (el) { |
|
263 |
var r = { x: el.offsetLeft, y: el.offsetTop }; |
|
264 |
// Resolve relative to offsetParent |
|
265 |
if (el.offsetParent) { |
|
266 |
var tmp = fb.absolutePosition(el.offsetParent); |
|
267 |
r.x += tmp.x; |
|
268 |
r.y += tmp.y; |
|
269 |
} |
|
270 |
return r; |
|
271 |
}; |
|
272 |
|
|
273 |
/* Various color utility functions */ |
|
274 |
fb.pack = function (rgb) { |
|
275 |
var r = Math.round(rgb[0] * 255); |
|
276 |
var g = Math.round(rgb[1] * 255); |
|
277 |
var b = Math.round(rgb[2] * 255); |
|
278 |
return '#' + (r < 16 ? '0' : '') + r.toString(16) + |
|
279 |
(g < 16 ? '0' : '') + g.toString(16) + |
|
280 |
(b < 16 ? '0' : '') + b.toString(16); |
|
281 |
} |
|
282 |
|
|
283 |
fb.unpack = function (color) { |
|
284 |
if (color.length == 7) { |
|
285 |
return [parseInt('0x' + color.substring(1, 3)) / 255, |
|
286 |
parseInt('0x' + color.substring(3, 5)) / 255, |
|
287 |
parseInt('0x' + color.substring(5, 7)) / 255]; |
|
288 |
} |
|
289 |
else if (color.length == 4) { |
|
290 |
return [parseInt('0x' + color.substring(1, 2)) / 15, |
|
291 |
parseInt('0x' + color.substring(2, 3)) / 15, |
|
292 |
parseInt('0x' + color.substring(3, 4)) / 15]; |
|
293 |
} |
|
294 |
} |
|
295 |
|
|
296 |
fb.HSLToRGB = function (hsl) { |
|
297 |
var m1, m2, r, g, b; |
|
298 |
var h = hsl[0], s = hsl[1], l = hsl[2]; |
|
299 |
m2 = (l <= 0.5) ? l * (s + 1) : l + s - l*s; |
|
300 |
m1 = l * 2 - m2; |
|
301 |
return [this.hueToRGB(m1, m2, h+0.33333), |
|
302 |
this.hueToRGB(m1, m2, h), |
|
303 |
this.hueToRGB(m1, m2, h-0.33333)]; |
|
304 |
} |
|
305 |
|
|
306 |
fb.hueToRGB = function (m1, m2, h) { |
|
307 |
h = (h < 0) ? h + 1 : ((h > 1) ? h - 1 : h); |
|
308 |
if (h * 6 < 1) return m1 + (m2 - m1) * h * 6; |
|
309 |
if (h * 2 < 1) return m2; |
|
310 |
if (h * 3 < 2) return m1 + (m2 - m1) * (0.66666 - h) * 6; |
|
311 |
return m1; |
|
312 |
} |
|
313 |
|
|
314 |
fb.RGBToHSL = function (rgb) { |
|
315 |
var min, max, delta, h, s, l; |
|
316 |
var r = rgb[0], g = rgb[1], b = rgb[2]; |
|
317 |
min = Math.min(r, Math.min(g, b)); |
|
318 |
max = Math.max(r, Math.max(g, b)); |
|
319 |
delta = max - min; |
|
320 |
l = (min + max) / 2; |
|
321 |
s = 0; |
|
322 |
if (l > 0 && l < 1) { |
|
323 |
s = delta / (l < 0.5 ? (2 * l) : (2 - 2 * l)); |
|
324 |
} |
|
325 |
h = 0; |
|
326 |
if (delta > 0) { |
|
327 |
if (max == r && max != g) h += (g - b) / delta; |
|
328 |
if (max == g && max != b) h += (2 + (b - r) / delta); |
|
329 |
if (max == b && max != r) h += (4 + (r - g) / delta); |
|
330 |
h /= 6; |
|
331 |
} |
|
332 |
return [h, s, l]; |
|
333 |
} |
|
334 |
|
|
335 |
// Install mousedown handler (the others are set on the document on-demand) |
|
336 |
$('*', e).mousedown(fb.mousedown); |
|
337 |
|
|
338 |
// Init color |
|
339 |
fb.setColor('#000000'); |
|
340 |
|
|
341 |
// Set linked elements/callback |
|
342 |
if (callback) { |
|
343 |
fb.linkTo(callback); |
|
344 |
} |
|
345 |
} |