/*!jQuery Knob*/
/**
* Downward compatible, touchable dial
*
* Version: 1.2.0 (15/07/2012)
* Requires: jQuery v1.7+
*
* Copyright (c) 2012 Anthony Terrien
* Under MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*
* Thanks to vor, eskimoblood, spiffistan, FabrizioC
*/
(function($) {
/**
* Kontrol library
*/
"use strict";
/**
* Definition of globals and core
*/
var k = {}, // kontrol
max = Math.max,
min = Math.min;
k.c = {};
k.c.d = $(document);
k.c.t = function (e) {
return e.originalEvent.touches.length - 1;
};
/**
* Kontrol Object
*
* Definition of an abstract UI control
*
* Each concrete component must call this one.
* <code>
* k.o.call(this);
* </code>
*/
k.o = function () {
var s = this;
this.o = null; // array of options
this.$ = null; // jQuery wrapped element
this.i = null; // mixed HTMLInputElement or array of HTMLInputElement
this.g = null; // 2D graphics context for 'pre-rendering'
this.v = null; // value ; mixed array or integer
this.cv = null; // change value ; not commited value
this.x = 0; // canvas x position
this.y = 0; // canvas y position
this.$c = null; // jQuery canvas element
this.c = null; // rendered canvas context
this.t = 0; // touches index
this.isInit = false;
this.fgColor = null; // main color
this.pColor = null; // previous color
this.dH = null; // draw hook
this.cH = null; // change hook
this.eH = null; // cancel hook
this.rH = null; // release hook
this.run = function () {
var cf = function (e, conf) {
var k;
for (k in conf) {
s.o[k] = conf[k];
}
s.init();
s._configure()
._draw();
};
if(this.$.data('kontroled')) return;
this.$.data('kontroled', true);
this.extend();
this.o = $.extend(
{
// Config
min : this.$.data('min') || 0,
max : this.$.data('max') || 100,
stopper : true,
readOnly : this.$.data('readonly'),
// UI
cursor : (this.$.data('cursor') === true && 30)
|| this.$.data('cursor')
|| 0,
thickness : this.$.data('thickness') || 0.35,
lineCap : this.$.data('linecap') || 'butt',
width : this.$.data('width') || 200,
height : this.$.data('height') || 200,
displayInput : this.$.data('displayinput') == null || this.$.data('displayinput'),
displayPrevious : this.$.data('displayprevious'),
fgColor : this.$.data('fgcolor') || '#87CEEB',
inputColor: this.$.data('inputcolor') || this.$.data('fgcolor') || '#87CEEB',
inline : false,
step : this.$.data('step') || 1,
// Hooks
draw : null, // function () {}
change : null, // function (value) {}
cancel : null, // function () {}
release : null // function (value) {}
}, this.o
);
// routing value
if(this.$.is('fieldset')) {
// fieldset = array of integer
this.v = {};
this.i = this.$.find('input');
this.i.each(function(k) {
var $this = $(this);
s.i[k] = $this;
s.v[k] = $this.val();
$this.bind(
'change'
, function () {
var val = {};
val[k] = $this.val();
s.val(val);
}
);
});
this.$.find('legend').remove();
} else {
// input = integer
this.i = this.$;
this.v = this.$.val();
(this.v == '') && (this.v = this.o.min);
this.$.bind(
'change'
, function () {
s.val(s._validate(s.$.val()));
}
);
}
(!this.o.displayInput) && this.$.hide();
this.$c = $('<canvas width="' +
this.o.width + 'px" height="' +
this.o.height + 'px"></canvas>');
this.c = this.$c[0].getContext("2d");
this.$
.wrap($('<div style="' + (this.o.inline ? 'display:inline;' : '') +
'width:' + this.o.width + 'px;height:' +
this.o.height + 'px;"></div>'))
.before(this.$c);
if (this.v instanceof Object) {
this.cv = {};
this.copy(this.v, this.cv);
} else {
this.cv = this.v;
}
this.$
.bind("configure", cf)
.parent()
.bind("configure", cf);
this._listen()
._configure()
._xy()
.init();
this.isInit = true;
this._draw();
return this;
};
this._draw = function () {
// canvas pre-rendering
var d = true,
c = document.createElement('canvas');
c.width = s.o.width;
c.height = s.o.height;
s.g = c.getContext('2d');
s.clear();
s.dH
&& (d = s.dH());
(d !== false) && s.draw();
s.c.drawImage(c, 0, 0);
c = null;
};
this._touch = function (e) {
var touchMove = function (e) {
var v = s.xy2val(
e.originalEvent.touches[s.t].pageX,
e.originalEvent.touches[s.t].pageY
);
if (v == s.cv) return;
if (
s.cH
&& (s.cH(v) === false)
) return;
s.change(s._validate(v));
s._draw();
};
// get touches index
this.t = k.c.t(e);
// First touch
touchMove(e);
// Touch events listeners
k.c.d
.bind("touchmove.k", touchMove)
.bind(
"touchend.k"
, function () {
k.c.d.unbind('touchmove.k touchend.k');
if (
s.rH
&& (s.rH(s.cv) === false)
) return;
s.val(s.cv);
}
);
return this;
};
this._mouse = function (e) {
var mouseMove = function (e) {
var v = s.xy2val(e.pageX, e.pageY);
if (v == s.cv) return;
if (
s.cH
&& (s.cH(v) === false)
) return;
s.change(s._validate(v));
s._draw();
};
// First click
mouseMove(e);
// Mouse events listeners
k.c.d
.bind("mousemove.k", mouseMove)
.bind(
// Escape key cancel current change
"keyup.k"
, function (e) {
if (e.keyCode === 27) {
k.c.d.unbind("mouseup.k mousemove.k keyup.k");
if (
s.eH
&& (s.eH() === false)
) return;
s.cancel();
}
}
)
.bind(
"mouseup.k"
, function (e) {
k.c.d.unbind('mousemove.k mouseup.k keyup.k');
if (
s.rH
&& (s.rH(s.cv) === false)
) return;
s.val(s.cv);
}
);
return this;
};
this._xy = function () {
var o = this.$c.offset();
this.x = o.left;
this.y = o.top;
return this;
};
this._listen = function () {
if (!this.o.readOnly) {
this.$c
.bind(
"mousedown"
, function (e) {
e.preventDefault();
s._xy()._mouse(e);
}
)
.bind(
"touchstart"
, function (e) {
e.preventDefault();
s._xy()._touch(e);
}
);
this.listen();
} else {
this.$.attr('readonly', 'readonly');
}
return this;
};
this._configure = function () {
// Hooks
if (this.o.draw) this.dH = this.o.draw;
if (this.o.change) this.cH = this.o.change;
if (this.o.cancel) this.eH = this.o.cancel;
if (this.o.release) this.rH = this.o.release;
if (this.o.displayPrevious) {
this.pColor = this.h2rgba(this.o.fgColor, "0.4");
this.fgColor = this.h2rgba(this.o.fgColor, "0.6");
} else {
this.fgColor = this.o.fgColor;
}
return this;
};
this._clear = function () {
this.$c[0].width = this.$c[0].width;
};
this._validate = function(v) {
return (~~ (((v < 0) ? -0.5 : 0.5) + (v/this.o.step))) * this.o.step;
};
// Abstract methods
this.listen = function () {}; // on start, one time
this.extend = function () {}; // each time configure triggered
this.init = function () {}; // each time configure triggered
this.change = function (v) {}; // on change
this.val = function (v) {}; // on release
this.xy2val = function (x, y) {}; //
this.draw = function () {}; // on change / on release
this.clear = function () { this._clear(); };
// Utils
this.h2rgba = function (h, a) {
var rgb;
h = h.substring(1,7);
rgb = [parseInt(h.substring(0,2),16)
,parseInt(h.substring(2,4),16)
,parseInt(h.substring(4,6),16)];
return "rgba(" + rgb[0] + "," + rgb[1] + "," + rgb[2] + "," + a + ")";
};
this.copy = function (f, t) {
for (var i in f) { t[i] = f[i]; }
};
};
/**
* k.Dial
*/
k.Dial = function () {
k.o.call(this);
this.startAngle = null;
this.xy = null;
this.radius = null;
this.lineWidth = null;
this.cursorExt = null;
this.w2 = null;
this.PI2 = 2*Math.PI;
this.extend = function () {
this.o = $.extend(
{
bgColor : this.$.data('bgcolor') || '#EEEEEE',
angleOffset : this.$.data('angleoffset') || 0,
angleArc : this.$.data('anglearc') || 360,
inline : true
}, this.o
);
};
this.val = function (v) {
if (null != v) {
this.cv = this.o.stopper ? max(min(v, this.o.max), this.o.min) : v;
this.v = this.cv;
this.$.val(this.v);
this._draw();
} else {
return this.v;
}
};
this.xy2val = function (x, y) {
var a, ret;
a = Math.atan2(
x - (this.x + this.w2)
, - (y - this.y - this.w2)
) - this.angleOffset;
if(this.angleArc != this.PI2 && (a < 0) && (a > -0.5)) {
// if isset angleArc option, set to min if .5 under min
a = 0;
} else if (a < 0) {
a += this.PI2;
}
ret = ~~ (0.5 + (a * (this.o.max - this.o.min) / this.angleArc))
+ this.o.min;
this.o.stopper
&& (ret = max(min(ret, this.o.max), this.o.min));
return ret;
};
this.listen = function () {
// bind MouseWheel
var s = this,
mw = function (e) {
e.preventDefault();
var ori = e.originalEvent
,deltaX = ori.detail || ori.wheelDeltaX
,deltaY = ori.detail || ori.wheelDeltaY
,v = parseInt(s.$.val()) + (deltaX>0 || deltaY>0 ? s.o.step : deltaX<0 || deltaY<0 ? -s.o.step : 0);
if (
s.cH
&& (s.cH(v) === false)
) return;
s.val(v);
}
, kval, to, m = 1, kv = {37:-s.o.step, 38:s.o.step, 39:s.o.step, 40:-s.o.step};
this.$
.bind(
"keydown"
,function (e) {
var kc = e.keyCode;
// numpad support
if(kc >= 96 && kc <= 105) {
kc = e.keyCode = kc - 48;
}
kval = parseInt(String.fromCharCode(kc));
if (isNaN(kval)) {
(kc !== 13) // enter
&& (kc !== 8) // bs
&& (kc !== 9) // tab
&& (kc !== 189) // -
&& e.preventDefault();
// arrows
if ($.inArray(kc,[37,38,39,40]) > -1) {
e.preventDefault();
var v = parseInt(s.$.val()) + kv[kc] * m;
s.o.stopper
&& (v = max(min(v, s.o.max), s.o.min));
s.change(v);
s._draw();
// long time keydown speed-up
to = window.setTimeout(
function () { m*=2; }
,30
);
}
}
}
)
.bind(
"keyup"
,function (e) {
if (isNaN(kval)) {
if (to) {
window.clearTimeout(to);
to = null;
m = 1;
s.val(s.$.val());
}
} else {
// kval postcond
(s.$.val() > s.o.max && s.$.val(s.o.max))
|| (s.$.val() < s.o.min && s.$.val(s.o.min));
}
}
);
this.$c.bind("mousewheel DOMMouseScroll", mw);
this.$.bind("mousewheel DOMMouseScroll", mw)
};
this.init = function () {
if (
this.v < this.o.min
|| this.v > this.o.max
) this.v = this.o.min;
this.$.val(this.v);
this.w2 = this.o.width / 2;
this.cursorExt = this.o.cursor / 100;
this.xy = this.w2;
this.lineWidth = this.xy * this.o.thickness;
this.lineCap = this.o.lineCap;
this.radius = this.xy - this.lineWidth / 2;
this.o.angleOffset
&& (this.o.angleOffset = isNaN(this.o.angleOffset) ? 0 : this.o.angleOffset);
this.o.angleArc
&& (this.o.angleArc = isNaN(this.o.angleArc) ? this.PI2 : this.o.angleArc);
// deg to rad
this.angleOffset = this.o.angleOffset * Math.PI / 180;
this.angleArc = this.o.angleArc * Math.PI / 180;
// compute start and end angles
this.startAngle = 1.5 * Math.PI + this.angleOffset;
this.endAngle = 1.5 * Math.PI + this.angleOffset + this.angleArc;
var s = max(
String(Math.abs(this.o.max)).length
, String(Math.abs(this.o.min)).length
, 2
) + 2;
this.o.displayInput
&& this.i.attr('class', 'progressBar')
|| this.i.css({
'width' : '0px'
,'visibility' : 'hidden'
});
};
this.change = function (v) {
this.cv = v;
this.$.val(v);
};
this.angle = function (v) {
return (v - this.o.min) * this.angleArc / (this.o.max - this.o.min);
};
this.draw = function () {
var c = this.g, // context
a = this.angle(this.cv) // Angle
, sat = this.startAngle // Start angle
, eat = sat + a // End angle
, sa, ea // Previous angles
, r = 1;
c.lineWidth = this.lineWidth;
c.lineCap = this.lineCap;
this.o.cursor
&& (sat = eat - this.cursorExt)
&& (eat = eat + this.cursorExt);
c.beginPath();
c.strokeStyle = this.o.bgColor;
c.arc(this.xy, this.xy, this.radius, this.endAngle, this.startAngle, true);
c.stroke();
if (this.o.displayPrevious) {
ea = this.startAngle + this.angle(this.v);
sa = this.startAngle;
this.o.cursor
&& (sa = ea - this.cursorExt)
&& (ea = ea + this.cursorExt);
c.beginPath();
c.strokeStyle = this.pColor;
c.arc(this.xy, this.xy, this.radius, sa, ea, false);
c.stroke();
r = (this.cv == this.v);
}
c.beginPath();
c.strokeStyle = r ? this.o.fgColor : this.fgColor ;
c.arc(this.xy, this.xy, this.radius, sat, eat, false);
c.stroke();
};
this.cancel = function () {
this.val(this.v);
};
};
$.fn.dial = $.fn.knob = function (o) {
return this.each(
function () {
var d = new k.Dial();
d.o = o;
d.$ = $(this);
d.run();
}
).parent();
};
})(jQuery);
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