/*!
* Color Picker 0.1.0 - Raphael plugin
*
* Copyright (c) 2010 Dmitry Baranovskiy (http://raphaeljs.com)
* Based on Color Wheel (http://jweir.github.com/colorwheel) by John Weir (http://famedriver.com)
* Licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) license.
*/
/*
* Usage
* var cp = Raphael.colorpicker(x, y, size, "#fff"); // #fff is optional init color
* cp.color(); // returns "#fff"
* cp.color("#fc0"); // sets new color
* cp.onchange = function (color) {
* // do something with the color when user change it
* }
* cp.remove(); // removes widget
*/
(function (Raphael) {
Raphael.colorpicker = function (x, y, size, initcolor, element) {
return new ColorPicker(x, y, size, initcolor, element);
};
Raphael.fn.colorPickerIcon = function (x, y, r) {
var segments = pi * r * 2 / Math.min(r / 8, 4);
var a = pi / 2 - pi * 2 / segments * 1.5,
path = ["M", x, y - r, "A", r, r, 0, 0, 1, r * Math.cos(a) + x, y - r * Math.sin(a), "L", x, y, "z"].join();
for (var i = 0; i < segments; i++) {
this.path(path).attr({
stroke: "none",
fill: "hsb(" + (segments - i) * (255 / segments) + ", 255, 255)",
rotation: [90 + (360 / segments) * i, x, y]
});
}
return this.circle(x, y, r).attr({
fill: "r#fff-#fff",
"fill-opacity": 0,
"stroke-width": Math.round(r * .03),
stroke: "#fff"
});
};
var pi = Math.PI;
function angle(x, y) {
return (x < 0) * 180 + Math.atan(-y / -x) * 180 / pi;
}
var doc = document, win = window,
addEvent = (function () {
if (doc.addEventListener) {
return function (obj, type, fn, element) {
var f = function (e) {
return fn.call(element, e);
};
obj.addEventListener(type, f, false);
return function () {
obj.removeEventListener(type, f, false);
return true;
};
};
} else if (doc.attachEvent) {
return function (obj, type, fn, element) {
var f = function (e) {
return fn.call(element, e || win.event);
};
obj.attachEvent("on" + type, f);
var detacher = function () {
obj.detachEvent("on" + type, f);
return true;
};
return detacher;
};
}
})(),
ColorPicker = function (x, y, size, initcolor, element) {
size = size || 200;
var w3 = 3 * size / 200,
w1 = size / 200,
fi = 1.6180339887,
size20 = size / 20,
size2 = size / 2,
padding = 2 * size / 200,
height = size + size20 * 2 + padding * 3,
t = this,
H = 1, S = 1, B = 1, s = size - (size20 * 4),
r = element ? Raphael(element, size, height) : Raphael(x, y, size, height),
xy = s / 6 + size20 * 2 + padding,
wh = s * 2 / 3 - padding * 2;
w1 < 1 && (w1 = 1);
w3 < 1 && (w3 = 1);
r.colorPickerIcon(size2, size2, size2 - padding);
t.cursor = r.set();
t.cursor.push(r.circle(size2, size2, size20 / 2).attr({
stroke: "#000",
opacity: .5,
"stroke-width": w3
}));
t.cursor.push(t.cursor[0].clone().attr({
stroke: "#fff",
opacity: 1,
"stroke-width": w1
}));
t.disc = r.circle(size2, size2, size2 - padding).attr({
fill: "#000",
"fill-opacity": 0,
stroke: "none",
cursor: "crosshair"
});
var style = t.disc.node.style;
style.unselectable = "on";
style.MozUserSelect = "none";
style.WebkitUserSelect= "none";
// brightness drawing
var h = size20 * 2 + 2;
t.brect = r.rect(padding + h / fi / 2, size + padding * 2, size - padding * 2 - h / fi, h - padding * 2).attr({
stroke: "#fff",
fill: "180-#fff-#000"
});
t.cursorb = r.set();
t.cursorb.push(r.rect(size - padding - h / fi, size + padding, ~~(h / fi), h, w3).attr({
stroke: "#000",
opacity: .5,
"stroke-width": w3
}));
t.cursorb.push(t.cursorb[0].clone().attr({
stroke: "#fff",
opacity: 1,
"stroke-width": w1
}));
t.btop = t.brect.clone().attr({
stroke: "#000",
fill: "#000",
opacity: 0
});
style = t.btop.node.style;
style.unselectable = "on";
style.MozUserSelect = "none";
style.WebkitUserSelect= "none";
t.bwidth = ~~(h / fi) / 2;
t.minx = padding + t.bwidth;
t.maxx = size - h / fi - padding + t.bwidth;
t.H = t.S = t.B = 1;
t.padding = padding;
t.raphael = r;
t.size2 = size2;
t.size20 = size20;
t.x = x;
t.y = y;
// events
t.hson = addEvent(t.disc.node, "mousedown", function (e) {
var scrollY = doc.documentElement.scrollTop || doc.body.scrollTop,
scrollX = doc.documentElement.scrollLeft || doc.body.scrollLeft;
this.hsOnTheMove = true;
this.setHS(e.clientX + scrollX - this.x, e.clientY + scrollY - this.y);
this.docmove = addEvent(doc, "mousemove", this.docOnMove, this);
this.docup = addEvent(doc, "mouseup", this.docOnUp, this);
}, t);
t.bon = addEvent(t.btop.node, "mousedown", function (e) {
var scrollX = doc.documentElement.scrollLeft || doc.body.scrollLeft;
this.bOnTheMove = true;
this.setB(e.clientX + scrollX - this.x);
this.docmove = addEvent(doc, "mousemove", this.docOnMove, this);
this.docup = addEvent(doc, "mouseup", this.docOnUp, this);
}, t);
t.winunload = addEvent(win, "unload", function () {
this.hson();
this.bon();
this.docmove && this.docmove();
this.docup && this.docup();
this.winunload();
}, t);
t.color(initcolor || "#fff");
this.onchanged && this.onchanged(this.color());
};
ColorPicker.prototype.setB = function (x) {
x < this.minx && (x = this.minx);
x > this.maxx && (x = this.maxx);
this.cursorb.attr({x: x - this.bwidth});
this.B = (x - this.minx) / (this.maxx - this.minx);
this.onchange && this.onchange(this.color());
};
ColorPicker.prototype.setHS = function (x, y) {
var X = x - this.size2,
Y = y - this.size2,
R = this.size2 - this.size20 / 2 - this.padding,
d = angle(X, Y),
rd = d * pi / 180;
isNaN(d) && (d = 0);
if (X * X + Y * Y > R * R) {
x = R * Math.cos(rd) + this.size2;
y = R * Math.sin(rd) + this.size2;
}
this.cursor.attr({cx: x, cy: y});
this.H = (1 - d / 360) % 1;
this.S = Math.min((X * X + Y * Y) / R / R, 1);
this.brect.attr({fill: "180-hsb(" + [this.H, this.S] + ",1)-#000"});
this.onchange && this.onchange(this.color());
};
ColorPicker.prototype.docOnMove = function (e) {
var scrollY = doc.documentElement.scrollTop || doc.body.scrollTop,
scrollX = doc.documentElement.scrollLeft || doc.body.scrollLeft;
if (this.hsOnTheMove) {
this.setHS(e.clientX + scrollX - this.x, e.clientY + scrollY - this.y);
}
if (this.bOnTheMove) {
this.setB(e.clientX + scrollX - this.x);
}
e.preventDefault && e.preventDefault();
e.returnValue = false;
return false;
};
ColorPicker.prototype.docOnUp = function (e) {
this.hsOnTheMove = this.bOnTheMove = false;
this.docmove();
delete this.docmove;
this.docup();
delete this.docup;
this.onchanged && this.onchanged(this.color());
e.preventDefault && e.preventDefault();
e.stopPropagation && e.stopPropagation();
e.returnValue = false;
return false;
};
ColorPicker.prototype.remove = function () {
this.raphael.remove();
this.color = function () {
return false;
};
};
ColorPicker.prototype.color = function (color) {
if (color) {
color = Raphael.getRGB(color);
var hex = color.hex;
color = Raphael.rgb2hsb(color.r, color.g, color.b);
d = color.h * 360;
this.H = color.h;
this.S = color.s;
this.B = color.b;
this.cursorb.attr({x: this.B * (this.maxx - this.minx) + this.minx - this.bwidth});
this.brect.attr({fill: "180-hsb(" + [this.H, this.S] + ",1)-#000"});
var d = (1 - this.H) * 360,
rd = d * pi / 180,
R = (this.size2 - this.size20 / 2 - this.padding) * this.S,
x = Math.cos(rd) * R + this.size2,
y = Math.sin(rd) * R + this.size2;
this.cursor.attr({cx: x, cy: y});
return this;
} else {
return Raphael.hsb2rgb(this.H, this.S, this.B).hex;
}
};
})(window.Raphael);