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- // $Id: farbtastic.js,v 1.2 2007/01/08 22:53:01 unconed Exp $
- // Farbtastic 1.2
- jQuery.fn.farbtastic = function (callback) {
- $.farbtastic(this, callback);
- return this;
- };
- jQuery.farbtastic = function (container, callback) {
- var container = $(container).get(0);
- return container.farbtastic || (container.farbtastic = new jQuery._farbtastic(container, callback));
- }
- jQuery._farbtastic = function (container, callback) {
- // Store farbtastic object
- var fb = this;
- // Insert markup
- $(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>');
- var e = $('.farbtastic', container);
- fb.wheel = $('.wheel', container).get(0);
- // Dimensions
- fb.radius = 84;
- fb.square = 100;
- fb.width = 194;
- // Fix background PNGs in IE6
- if (navigator.appVersion.match(/MSIE [0-6]\./)) {
- $('*', e).each(function () {
- if (this.currentStyle.backgroundImage != 'none') {
- var image = this.currentStyle.backgroundImage;
- image = this.currentStyle.backgroundImage.substring(5, image.length - 2);
- $(this).css({
- 'backgroundImage': 'none',
- 'filter': "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=crop, src='" + image + "')"
- });
- }
- });
- }
- /**
- * Link to the given element(s) or callback.
- */
- fb.linkTo = function (callback) {
- // Unbind previous nodes
- if (typeof fb.callback == 'object') {
- $(fb.callback).unbind('keyup', fb.updateValue);
- }
- // Reset color
- fb.color = null;
- // Bind callback or elements
- if (typeof callback == 'function') {
- fb.callback = callback;
- }
- else if (typeof callback == 'object' || typeof callback == 'string') {
- fb.callback = $(callback);
- fb.callback.bind('keyup', fb.updateValue);
- if (fb.callback.get(0).value) {
- fb.setColor(fb.callback.get(0).value);
- }
- }
- return this;
- }
- fb.updateValue = function (event) {
- if (this.value && this.value != fb.color) {
- fb.setColor(this.value);
- }
- }
- /**
- * Change color with HTML syntax #123456
- */
- fb.setColor = function (color) {
- var unpack = fb.unpack(color);
- if (fb.color != color && unpack) {
- fb.color = color;
- fb.rgb = unpack;
- fb.hsl = fb.RGBToHSL(fb.rgb);
- fb.updateDisplay();
- }
- return this;
- }
- /**
- * Change color with HSL triplet [0..1, 0..1, 0..1]
- */
- fb.setHSL = function (hsl) {
- fb.hsl = hsl;
- fb.rgb = fb.HSLToRGB(hsl);
- fb.color = fb.pack(fb.rgb);
- fb.updateDisplay();
- return this;
- }
- /////////////////////////////////////////////////////
- /**
- * Retrieve the coordinates of the given event relative to the center
- * of the widget.
- */
- fb.widgetCoords = function (event) {
- var x, y;
- var el = event.target || event.srcElement;
- var reference = fb.wheel;
- if (typeof event.offsetX != 'undefined') {
- // Use offset coordinates and find common offsetParent
- var pos = { x: event.offsetX, y: event.offsetY };
- // Send the coordinates upwards through the offsetParent chain.
- var e = el;
- while (e) {
- e.mouseX = pos.x;
- e.mouseY = pos.y;
- pos.x += e.offsetLeft;
- pos.y += e.offsetTop;
- e = e.offsetParent;
- }
- // Look for the coordinates starting from the wheel widget.
- var e = reference;
- var offset = { x: 0, y: 0 }
- while (e) {
- if (typeof e.mouseX != 'undefined') {
- x = e.mouseX - offset.x;
- y = e.mouseY - offset.y;
- break;
- }
- offset.x += e.offsetLeft;
- offset.y += e.offsetTop;
- e = e.offsetParent;
- }
- // Reset stored coordinates
- e = el;
- while (e) {
- e.mouseX = undefined;
- e.mouseY = undefined;
- e = e.offsetParent;
- }
- }
- else {
- // Use absolute coordinates
- var pos = fb.absolutePosition(reference);
- x = (event.pageX || 0*(event.clientX + $('html').get(0).scrollLeft)) - pos.x;
- y = (event.pageY || 0*(event.clientY + $('html').get(0).scrollTop)) - pos.y;
- }
- // Subtract distance to middle
- return { x: x - fb.width / 2, y: y - fb.width / 2 };
- }
- /**
- * Mousedown handler
- */
- fb.mousedown = function (event) {
- // Capture mouse
- if (!document.dragging) {
- $(document).bind('mousemove', fb.mousemove).bind('mouseup', fb.mouseup);
- document.dragging = true;
- }
- // Check which area is being dragged
- var pos = fb.widgetCoords(event);
- // Process
- fb.mousemove(event);
- return false;
- }
- /**
- * Mousemove handler
- */
- fb.mousemove = function (event) {
- // Get coordinates relative to color picker center
- var pos = fb.widgetCoords(event);
- // Set new HSL parameters
- if (fb.circleDrag) {
- if (hue < 0) hue += 1;
- fb.setHSL([hue, fb.hsl[1], fb.hsl[2]]);
- }
- else {
- var sat = Math.max(0, Math.min(1, -(pos.x / fb.square) + .5));
- var lum = Math.max(0, Math.min(1, -(pos.y / fb.square) + .5));
- fb.setHSL([fb.hsl[0], sat, lum]);
- }
- return false;
- }
- /**
- * Mouseup handler
- */
- fb.mouseup = function () {
- // Uncapture mouse
- $(document).unbind('mousemove', fb.mousemove);
- $(document).unbind('mouseup', fb.mouseup);
- document.dragging = false;
- }
- /**
- * Update the markers and styles
- */
- fb.updateDisplay = function () {
- // Markers
- var angle = fb.hsl[0] * 6.28;
- $('.h-marker', e).css({
- });
- $('.sl-marker', e).css({
- left: Math.round(fb.square * (.5 - fb.hsl[1]) + fb.width / 2) + 'px',
- top: Math.round(fb.square * (.5 - fb.hsl[2]) + fb.width / 2) + 'px'
- });
- // Saturation/Luminance gradient
- $('.color', e).css('backgroundColor', fb.pack(fb.HSLToRGB([fb.hsl[0], 1, 0.5])));
- // Linked elements or callback
- if (typeof fb.callback == 'object') {
- // Set background/foreground color
- $(fb.callback).css({
- backgroundColor: fb.color,
- color: fb.hsl[2] > 0.5 ? '#000' : '#fff'
- });
- // Change linked value
- $(fb.callback).each(function() {
- if (this.value && this.value != fb.color) {
- this.value = fb.color;
- }
- });
- }
- else if (typeof fb.callback == 'function') {
- fb.callback.call(fb, fb.color);
- }
- }
- /**
- * Get absolute position of element
- */
- fb.absolutePosition = function (el) {
- var r = { x: el.offsetLeft, y: el.offsetTop };
- // Resolve relative to offsetParent
- if (el.offsetParent) {
- var tmp = fb.absolutePosition(el.offsetParent);
- r.x += tmp.x;
- r.y += tmp.y;
- }
- return r;
- };
- /* Various color utility functions */
- fb.pack = function (rgb) {
- var r = Math.round(rgb[0] * 255);
- var g = Math.round(rgb[1] * 255);
- var b = Math.round(rgb[2] * 255);
- return '#' + (r < 16 ? '0' : '') + r.toString(16) +
- (g < 16 ? '0' : '') + g.toString(16) +
- (b < 16 ? '0' : '') + b.toString(16);
- }
- fb.unpack = function (color) {
- if (color.length == 7) {
- return [parseInt('0x' + color.substring(1, 3)) / 255,
- parseInt('0x' + color.substring(3, 5)) / 255,
- parseInt('0x' + color.substring(5, 7)) / 255];
- }
- else if (color.length == 4) {
- return [parseInt('0x' + color.substring(1, 2)) / 15,
- parseInt('0x' + color.substring(2, 3)) / 15,
- parseInt('0x' + color.substring(3, 4)) / 15];
- }
- }
- fb.HSLToRGB = function (hsl) {
- var m1, m2, r, g, b;
- var h = hsl[0], s = hsl[1], l = hsl[2];
- m2 = (l <= 0.5) ? l * (s + 1) : l + s - l*s;
- m1 = l * 2 - m2;
- return [this.hueToRGB(m1, m2, h+0.33333),
- this.hueToRGB(m1, m2, h),
- this.hueToRGB(m1, m2, h-0.33333)];
- }
- fb.hueToRGB = function (m1, m2, h) {
- h = (h < 0) ? h + 1 : ((h > 1) ? h - 1 : h);
- if (h * 6 < 1) return m1 + (m2 - m1) * h * 6;
- if (h * 2 < 1) return m2;
- if (h * 3 < 2) return m1 + (m2 - m1) * (0.66666 - h) * 6;
- return m1;
- }
- fb.RGBToHSL = function (rgb) {
- var min, max, delta, h, s, l;
- var r = rgb[0], g = rgb[1], b = rgb[2];
- min = Math.min(r, Math.min(g, b));
- max = Math.max(r, Math.max(g, b));
- delta = max - min;
- l = (min + max) / 2;
- s = 0;
- if (l > 0 && l < 1) {
- s = delta / (l < 0.5 ? (2 * l) : (2 - 2 * l));
- }
- h = 0;
- if (delta > 0) {
- if (max == r && max != g) h += (g - b) / delta;
- if (max == g && max != b) h += (2 + (b - r) / delta);
- if (max == b && max != r) h += (4 + (r - g) / delta);
- h /= 6;
- }
- return [h, s, l];
- }
- // Install mousedown handler (the others are set on the document on-demand)
- $('*', e).mousedown(fb.mousedown);
- // Init color
- fb.setColor('#000000');
- // Set linked elements/callback
- if (callback) {
- fb.linkTo(callback);
- }
- }