/*
 * jQuery UI Slider
 *
 * Copyright (c) 2008 Paul Bakaus
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 * 
 * http://docs.jquery.com/UI/Slider
 *
 * Depends:
 *	ui.core.js
 */
(function($) {
$.fn.unwrap = $.fn.unwrap || function(expr) {
  return this.each(function(){
     $(this).parents(expr).eq(0).after(this).remove();
  });
};
$.widget("ui.slider", {
plugins: {},
ui: function(e) {
return {
options: this.options,
handle: this.currentHandle,
value: this.options.axis != "both" || !this.options.axis ? Math.round(this.value(null,this.options.axis == "vertical" ? "y" : "x")) : {
x: Math.round(this.value(null,"x")),
y: Math.round(this.value(null,"y"))
},
range: this.getRange()
};
},
propagate: function(n,e) {
$.ui.plugin.call(this, n, [e, this.ui()]);
this.element.triggerHandler(n == "slide" ? n : "slide"+n, [e, this.ui()], this.options[n]);
},
destroy: function() {
this.element
.removeClass("ui-slider ui-slider-disabled")
.removeData("slider")
.unbind(".slider");
if(this.handle && this.handle.length) {
this.handle
.unwrap("a");
this.handle.each(function() {
$(this).data("mouse").mouseDestroy();
});
}
this.generated && this.generated.remove();
},
setData: function(key, value) {
$.widget.prototype.setData.apply(this, arguments);
if (/min|max|steps/.test(key)) {
this.initBoundaries();
}
if(key == "range") {
value ? this.handle.length == 2 && this.createRange() : this.removeRange();
}
},
init: function() {
var self = this;
this.element.addClass("ui-slider");
this.initBoundaries();
// Initialize mouse and key events for interaction
this.handle = $(this.options.handle, this.element);
if (!this.handle.length) {
self.handle = self.generated = $(self.options.handles || [0]).map(function() {
var handle = $("<div/>").addClass("ui-slider-handle").appendTo(self.element);
if (this.id)
handle.attr("id", this.id);
return handle[0];
});
}
var handleclass = function(el) {
this.element = $(el);
this.element.data("mouse", this);
this.options = self.options;
this.element.bind("mousedown", function() {
if(self.currentHandle) this.blur(self.currentHandle);
self.focus(this,1);
});
this.mouseInit();
};
$.extend(handleclass.prototype, $.ui.mouse, {
mouseStart: function(e) { return self.start.call(self, e, this.element[0]); },
mouseStop: function(e) { return self.stop.call(self, e, this.element[0]); },
mouseDrag: function(e) { return self.drag.call(self, e, this.element[0]); },
mouseCapture: function() { return true; },
trigger: function(e) { this.mouseDown(e); }
});
$(this.handle)
.each(function() {
new handleclass(this);
})
.wrap('<a href="javascript:void(0)" style="outline:none;border:none;"></a>')
.parent()
.bind('focus', function(e) { self.focus(this.firstChild); })
.bind('blur', function(e) { self.blur(this.firstChild); })
.bind('keydown', function(e) { if(!self.options.noKeyboard) self.keydown(e.keyCode, this.firstChild); })
;
// Bind the click to the slider itself
this.element.bind('mousedown.slider', function(e) {
self.click.apply(self, [e]);
self.currentHandle.data("mouse").trigger(e);
self.firstValue = self.firstValue + 1; //This is for always triggering the change event
});
// Move the first handle to the startValue
$.each(this.options.handles || [], function(index, handle) {
self.moveTo(handle.start, index, true);
});
if (!isNaN(this.options.startValue))
this.moveTo(this.options.startValue, 0, true);
this.previousHandle = $(this.handle[0]); //set the previous handle to the first to allow clicking before selecting the handle
if(this.handle.length == 2 && this.options.range) this.createRange();
},
initBoundaries: function() {
var element = this.element[0], o = this.options;
this.actualSize = { width: this.element.outerWidth() , height: this.element.outerHeight() };			
$.extend(o, {
axis: o.axis || (element.offsetWidth < element.offsetHeight ? 'vertical' : 'horizontal'),
max: !isNaN(parseInt(o.max,10)) ? { x: parseInt(o.max, 10), y: parseInt(o.max, 10) } : ({ x: o.max && o.max.x || 100, y: o.max && o.max.y || 100 }),
min: !isNaN(parseInt(o.min,10)) ? { x: parseInt(o.min, 10), y: parseInt(o.min, 10) } : ({ x: o.min && o.min.x || 0, y: o.min && o.min.y || 0 })
});
//Prepare the real maxValue
o.realMax = {
x: o.max.x - o.min.x,
y: o.max.y - o.min.y
};
//Calculate stepping based on steps
o.stepping = {
x: o.stepping && o.stepping.x || parseInt(o.stepping, 10) || (o.steps ? o.realMax.x/(o.steps.x || parseInt(o.steps, 10) || o.realMax.x) : 0),
y: o.stepping && o.stepping.y || parseInt(o.stepping, 10) || (o.steps ? o.realMax.y/(o.steps.y || parseInt(o.steps, 10) || o.realMax.y) : 0)
};
},
keydown: function(keyCode, handle) {
var k = keyCode;
if(/(33|34|35|36|37|38|39|40)/.test(k)) {
var o = this.options, xpos, ypos;
if (/(35|36)/.test(k)) {
xpos = (k == 35) ? o.max.x : o.min.x;
ypos = (k == 35) ? o.max.y : o.min.y;
} else {
var oper = /(34|37|40)/.test(k) ? "-=" : "+=";
var step = /(37|38|39|40)/.test(k) ? "oneStep" : "pageStep";
xpos = oper + this[step]("x");
ypos = oper + this[step]("y");
}
this.moveTo({
x: xpos,
y: ypos
}, handle);
}
},
focus: function(handle,hard) {
this.currentHandle = $(handle).addClass('ui-slider-handle-active');
if (hard)
this.currentHandle.parent()[0].focus();
},
blur: function(handle) {
$(handle).removeClass('ui-slider-handle-active');
if(this.currentHandle && this.currentHandle[0] == handle) { this.previousHandle = this.currentHandle; this.currentHandle = null; };
},
click: function(e) {
// This method is only used if:
// - The user didn't click a handle
// - The Slider is not disabled
// - There is a current, or previous selected handle (otherwise we wouldn't know which one to move)
var pointer = [e.pageX,e.pageY];
var clickedHandle = false;
this.handle.each(function() {
if(this == e.target)
clickedHandle = true;
});
if (clickedHandle || this.options.disabled || !(this.currentHandle || this.previousHandle))
return;
// If a previous handle was focussed, focus it again
if (!this.currentHandle && this.previousHandle)
this.focus(this.previousHandle, true);
// propagate only for distance > 0, otherwise propagation is done my drag
this.offset = this.element.offset();
this.moveTo({
y: this.convertValue(e.pageY - this.offset.top - this.currentHandle[0].offsetHeight/2, "y"),
x: this.convertValue(e.pageX - this.offset.left - this.currentHandle[0].offsetWidth/2, "x")
}, null, !this.options.distance);
},
createRange: function() {
if(this.rangeElement) return;
this.rangeElement = $('<div></div>')
.addClass('ui-slider-range')
.css({ position: 'absolute' })
.appendTo(this.element);
this.updateRange();
},
removeRange: function() {
this.rangeElement.remove();
this.rangeElement = null;
},
updateRange: function() {
var prop = this.options.axis == "vertical" ? "top" : "left";
var size = this.options.axis == "vertical" ? "height" : "width";
this.rangeElement.css(prop, (parseInt($(this.handle[0]).css(prop),10) || 0) + this.handleSize(0, this.options.axis == "vertical" ? "y" : "x")/2);
this.rangeElement.css(size, (parseInt($(this.handle[1]).css(prop),10) || 0) - (parseInt($(this.handle[0]).css(prop),10) || 0));
},
getRange: function() {
return this.rangeElement ? this.convertValue(parseInt(this.rangeElement.css(this.options.axis == "vertical" ? "height" : "width"),10), this.options.axis == "vertical" ? "y" : "x") : null;
},
handleIndex: function() {
return this.handle.index(this.currentHandle[0]);
},
value: function(handle, axis) {
if(this.handle.length == 1) this.currentHandle = this.handle;
if(!axis) axis = this.options.axis == "vertical" ? "y" : "x";
var curHandle = $(handle != undefined && handle !== null ? this.handle[handle] || handle : this.currentHandle);
if(curHandle.data("mouse").sliderValue) {
return parseInt(curHandle.data("mouse").sliderValue[axis],10);
} else {
return parseInt(((parseInt(curHandle.css(axis == "x" ? "left" : "top"),10) / (this.actualSize[axis == "x" ? "width" : "height"] - this.handleSize(handle,axis))) * this.options.realMax[axis]) + this.options.min[axis],10);
}
},
convertValue: function(value,axis) {
return this.options.min[axis] + (value / (this.actualSize[axis == "x" ? "width" : "height"] - this.handleSize(null,axis))) * this.options.realMax[axis];
},
translateValue: function(value,axis) {
return ((value - this.options.min[axis]) / this.options.realMax[axis]) * (this.actualSize[axis == "x" ? "width" : "height"] - this.handleSize(null,axis));
},
translateRange: function(value,axis) {
if (this.rangeElement) {
if (this.currentHandle[0] == this.handle[0] && value >= this.translateValue(this.value(1),axis))
value = this.translateValue(this.value(1,axis) - this.oneStep(axis), axis);
if (this.currentHandle[0] == this.handle[1] && value <= this.translateValue(this.value(0),axis))
value = this.translateValue(this.value(0,axis) + this.oneStep(axis), axis);
}
if (this.options.handles) {
var handle = this.options.handles[this.handleIndex()];
if (value < this.translateValue(handle.min,axis)) {
value = this.translateValue(handle.min,axis);
} else if (value > this.translateValue(handle.max,axis)) {
value = this.translateValue(handle.max,axis);
}
}
return value;
},
translateLimits: function(value,axis) {
if (value >= this.actualSize[axis == "x" ? "width" : "height"] - this.handleSize(null,axis))
value = this.actualSize[axis == "x" ? "width" : "height"] - this.handleSize(null,axis);
if (value <= 0)
value = 0;
return value;
},
handleSize: function(handle,axis) {
return $(handle != undefined && handle !== null ? this.handle[handle] : this.currentHandle)[0]["offset"+(axis == "x" ? "Width" : "Height")];	
},
oneStep: function(axis) {
return this.options.stepping[axis] || 1;
},
pageStep: function(axis) {
return /* this.options.paging[axis] ||*/ 10;
},
start: function(e, handle) {
var o = this.options;
if(o.disabled) return false;
// Prepare the outer size
this.actualSize = { width: this.element.outerWidth() , height: this.element.outerHeight() };
// This is a especially ugly fix for strange blur events happening on mousemove events
if (!this.currentHandle)
this.focus(this.previousHandle, true); 
this.offset = this.element.offset();
this.handleOffset = this.currentHandle.offset();
this.clickOffset = { top: e.pageY - this.handleOffset.top, left: e.pageX - this.handleOffset.left };
this.firstValue = this.value();
this.propagate('start', e);
this.drag(e, handle);
return true;
},
stop: function(e) {
this.propagate('stop', e);
if (this.firstValue != this.value())
this.propagate('change', e);
// This is a especially ugly fix for strange blur events happening on mousemove events
this.focus(this.currentHandle, true);
return false;
},
drag: function(e, handle) {
var o = this.options;
var position = { top: e.pageY - this.offset.top - this.clickOffset.top, left: e.pageX - this.offset.left - this.clickOffset.left};
if(!this.currentHandle) this.focus(this.previousHandle, true); //This is a especially ugly fix for strange blur events happening on mousemove events
position.left = this.translateLimits(position.left, "x");
position.top = this.translateLimits(position.top, "y");
if (o.stepping.x) {
var value = this.convertValue(position.left, "x");
value = Math.round(value / o.stepping.x) * o.stepping.x;
position.left = this.translateValue(value, "x");	
}
if (o.stepping.y) {
var value = this.convertValue(position.top, "y");
value = Math.round(value / o.stepping.y) * o.stepping.y;
position.top = this.translateValue(value, "y");	
}
position.left = this.translateRange(position.left, "x");
position.top = this.translateRange(position.top, "y");
if(o.axis != "vertical") this.currentHandle.css({ left: position.left });
if(o.axis != "horizontal") this.currentHandle.css({ top: position.top });
//Store the slider's value
this.currentHandle.data("mouse").sliderValue = {
x: Math.round(this.convertValue(position.left, "x")) || 0,
y: Math.round(this.convertValue(position.top, "y")) || 0
};
if (this.rangeElement)
this.updateRange();
this.propagate('slide', e);
return false;
},
moveTo: function(value, handle, noPropagation) {
var o = this.options;
// Prepare the outer size
this.actualSize = { width: this.element.outerWidth() , height: this.element.outerHeight() };
//If no handle has been passed, no current handle is available and we have multiple handles, return false
if (handle == undefined && !this.currentHandle && this.handle.length != 1)
return false; 
//If only one handle is available, use it
if (handle == undefined && !this.currentHandle)
handle = 0;
if (handle != undefined)
this.currentHandle = this.previousHandle = $(this.handle[handle] || handle);
if(value.x !== undefined && value.y !== undefined) {
var x = value.x, y = value.y;
} else {
var x = value, y = value;
}
if(x !== undefined && x.constructor != Number) {
var me = /^\-\=/.test(x), pe = /^\+\=/.test(x);
if(me || pe) {
x = this.value(null, "x") + parseInt(x.replace(me ? '=' : '+=', ''), 10);
} else {
x = isNaN(parseInt(x, 10)) ? undefined : parseInt(x, 10);
}
}
if(y !== undefined && y.constructor != Number) {
var me = /^\-\=/.test(y), pe = /^\+\=/.test(y);
if(me || pe) {
y = this.value(null, "y") + parseInt(y.replace(me ? '=' : '+=', ''), 10);
} else {
y = isNaN(parseInt(y, 10)) ? undefined : parseInt(y, 10);
}
}
if(o.axis != "vertical" && x !== undefined) {
if(o.stepping.x) x = Math.round(x / o.stepping.x) * o.stepping.x;
x = this.translateValue(x, "x");
x = this.translateLimits(x, "x");
x = this.translateRange(x, "x");
o.animate ? this.currentHandle.stop().animate({ left: x }, (Math.abs(parseInt(this.currentHandle.css("left")) - x)) * (!isNaN(parseInt(o.animate)) ? o.animate : 5)) : this.currentHandle.css({ left: x });
}
if(o.axis != "horizontal" && y !== undefined) {
if(o.stepping.y) y = Math.round(y / o.stepping.y) * o.stepping.y;
y = this.translateValue(y, "y");
y = this.translateLimits(y, "y");
y = this.translateRange(y, "y");
o.animate ? this.currentHandle.stop().animate({ top: y }, (Math.abs(parseInt(this.currentHandle.css("top")) - y)) * (!isNaN(parseInt(o.animate)) ? o.animate : 5)) : this.currentHandle.css({ top: y });
}
if (this.rangeElement)
this.updateRange();
//Store the slider's value
this.currentHandle.data("mouse").sliderValue = {
x: Math.round(this.convertValue(x, "x")) || 0,
y: Math.round(this.convertValue(y, "y")) || 0
};
if (!noPropagation) {
this.propagate('start', null);
this.propagate('stop', null);
this.propagate('change', null);
this.propagate("slide", null);
}
}
});
$.ui.slider.getter = "value";
$.ui.slider.defaults = {
handle: ".ui-slider-handle",
distance: 1,
animate: false
};
})(jQuery);