--- /dev/null
+/**
+ * Farbtastic Color Picker 1.2
+ * © 2008 Steven Wittens
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+(function ($){
+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);
+ fb.circleDrag = Math.max(Math.abs(pos.x), Math.abs(pos.y)) * 2 > fb.square;
+
+ // 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) {
+ var hue = Math.atan2(pos.x, -pos.y) / 6.28;
+ 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({
+ left: Math.round(Math.sin(angle) * fb.radius + fb.width / 2) + 'px',
+ top: Math.round(-Math.cos(angle) * fb.radius + fb.width / 2) + 'px'
+ });
+
+ $('.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);
+ }
+}
+})(jQuery);
projects / freeside.git / blobdiff