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(function($) {
$.fn.extend({
slider: function(options) {
var args = Array.prototype.slice.call(arguments, 1);
if ( options == "value" )
return $.data(this[0], "ui-slider").value(arguments[1]);
return this.each(function() {
if (typeof options == "string") {
var slider = $.data(this, "ui-slider");
slider[options].apply(slider, args);
} else if(!$.data(this, "ui-slider"))
new $.ui.slider(this, options);
});
}
});
$.ui.slider = function(element, options) {
//Initialize needed constants
var self = this;
this.element = $(element);
$.data(element, "ui-slider", this);
this.element.addClass("ui-slider");
//Prepare the passed options
this.options = $.extend({}, options);
var o = this.options;
$.extend(o, {
axis: o.axis || (element.offsetWidth < element.offsetHeight ? 'vertical' : 'horizontal'),
maxValue: !isNaN(parseInt(o.maxValue,10)) ? parseInt(o.maxValue,10) : 100,
minValue: parseInt(o.minValue,10) || 0,
startValue: parseInt(o.startValue,10) || 'none'
});
//Prepare the real maxValue
o.realMaxValue = o.maxValue - o.minValue;
//Calculate stepping based on steps
o.stepping = parseInt(o.stepping,10) || (o.steps ? o.realMaxValue/o.steps : 0);
$(element).bind("setData.slider", function(event, key, value){
self.options[key] = value;
}).bind("getData.slider", function(event, key){
return self.options[key];
});
//Initialize mouse and key events for interaction
this.handle = o.handle ? $(o.handle, element) : $('> *', element);
$(this.handle)
.mouseInteraction({
executor: this,
delay: o.delay,
distance: o.distance || 0,
dragPrevention: o.prevention ? o.prevention.toLowerCase().split(',') : ['input','textarea','button','select','option'],
start: this.start,
stop: this.stop,
drag: this.drag,
condition: function(e, handle) {
if(!this.disabled) {
if(this.currentHandle) this.blur(this.currentHandle);
this.focus(handle,1);
return !this.disabled;
}
}
})
.wrap('<a href="javascript:void(0)"></a>')
.parent()
.bind('focus', function(e) { self.focus(this.firstChild); })
.bind('blur', function(e) { self.blur(this.firstChild); })
.bind('keydown', function(e) {
if(/(37|39)/.test(e.keyCode))
self.moveTo((e.keyCode == 37 ? '-' : '+')+'='+(self.options.stepping ? self.options.stepping : (self.options.realMaxValue / self.size)*5),this.firstChild);
})
;
//Position the node
if(o.helper == 'original' && (this.element.css('position') == 'static' || this.element.css('position') == '')) this.element.css('position', 'relative');
//Prepare dynamic properties for later use
if(o.axis == 'horizontal') {
this.size = this.element.outerWidth();
this.properties = ['left', 'width'];
} else {
this.size = this.element.outerHeight();
this.properties = ['top', 'height'];
}
//Bind the click to the slider itself
this.element.bind('click', function(e) { self.click.apply(self, [e]); });
//Move the first handle to the startValue
if(!isNaN(o.startValue)) this.moveTo(o.startValue, 0);
//If we only have one handle, set the previous handle to this one to allow clicking before selecting the handle
if(this.handle.length == 1) this.previousHandle = this.handle;
if(this.handle.length == 2 && o.range) this.createRange();
};
$.extend($.ui.slider.prototype, {
plugins: {},
createRange: function() {
this.rangeElement = $('<div></div>')
.addClass('ui-slider-range')
.css({ position: 'absolute' })
.css(this.properties[0], parseInt($(this.handle[0]).css(this.properties[0]),10) + this.handleSize(0)/2)
.css(this.properties[1], parseInt($(this.handle[1]).css(this.properties[0]),10) - parseInt($(this.handle[0]).css(this.properties[0]),10))
.appendTo(this.element);
},
updateRange: function() {
this.rangeElement.css(this.properties[0], parseInt($(this.handle[0]).css(this.properties[0]),10) + this.handleSize(0)/2);
this.rangeElement.css(this.properties[1], parseInt($(this.handle[1]).css(this.properties[0]),10) - parseInt($(this.handle[0]).css(this.properties[0]),10));
},
getRange: function() {
return this.rangeElement ? this.convertValue(parseInt(this.rangeElement.css(this.properties[1]),10)) : null;
},
ui: function(e) {
return {
instance: this,
options: this.options,
handle: this.currentHandle,
value: this.value(),
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("ul-slider")
.unbind(".slider");
this.handles.removeMouseInteraction();
},
enable: function() {
this.element.removeClass("ui-slider-disabled");
this.disabled = false;
},
disable: function() {
this.element.addClass("ui-slider-disabled");
this.disabled = true;
},
focus: function(handle,hard) {
this.currentHandle = $(handle).addClass('ui-slider-handle-active');
if(hard) this.currentHandle.parent()[0].focus();
},
blur: function(handle) {
$(handle).removeClass('ui-slider-handle-active');
if(this.currentHandle && this.currentHandle[0] == handle) { this.previousHandle = this.currentHandle; this.currentHandle = null; };
},
value: function(handle) {
if(this.handle.length == 1) this.currentHandle = this.handle;
return ((parseInt($(handle != undefined ? this.handle[handle] || handle : this.currentHandle).css(this.properties[0]),10) / (this.size - this.handleSize())) * this.options.realMaxValue) + this.options.minValue;
},
convertValue: function(value) {
return (value / (this.size - this.handleSize())) * this.options.realMaxValue;
},
translateValue: function(value) {
return ((value - this.options.minValue) / this.options.realMaxValue) * (this.size - this.handleSize());
},
handleSize: function(handle) {
return $(handle != undefined ? this.handle[handle] : this.currentHandle)['outer'+this.properties[1].substr(0,1).toUpperCase()+this.properties[1].substr(1)]();
},
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.disabled || !(this.currentHandle || this.previousHandle)) return;
//If a previous handle was focussed, focus it again
if(this.previousHandle) this.focus(this.previousHandle, 1);
//Move focussed handle to the clicked position
this.offset = this.element.offset();
this.moveTo(this.convertValue(e[this.properties[0] == 'top' ? 'pageY' : 'pageX'] - this.offset[this.properties[0]] - this.handleSize()/2));
},
start: function(e, handle) {
var o = this.options;
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);
return false;
},
stop: function(e) {
this.propagate('stop', e);
if(this.firstValue != this.value()) this.propagate('change', e);
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};
var modifier = position[this.properties[0]];
if(modifier >= this.size - this.handleSize()) modifier = this.size - this.handleSize();
if(modifier <= 0) modifier = 0;
if(o.stepping) {
var value = this.convertValue(modifier);
value = Math.round(value / o.stepping) * o.stepping;
modifier = this.translateValue(value);
}
if(this.rangeElement) {
if(this.currentHandle[0] == this.handle[0] && modifier >= this.translateValue(this.value(1))) modifier = this.translateValue(this.value(1));
if(this.currentHandle[0] == this.handle[1] && modifier <= this.translateValue(this.value(0))) modifier = this.translateValue(this.value(0));
}
this.currentHandle.css(this.properties[0], modifier);
if(this.rangeElement) this.updateRange();
this.propagate('slide', e);
return false;
},
moveTo: function(value, handle) {
var o = this.options;
if(handle == undefined && !this.currentHandle && this.handle.length != 1) return false; //If no handle has been passed, no current handle is available and we have multiple handles, return false
if(handle == undefined && !this.currentHandle) handle = 0; //If only one handle is available, use it
if(handle != undefined) this.currentHandle = this.previousHandle = $(this.handle[handle] || handle);
if(value.constructor == String) value = /\-\=/.test(value) ? this.value() - parseInt(value.replace('-=', ''),10) : this.value() + parseInt(value.replace('+=', ''),10);
if(o.stepping) value = Math.round(value / o.stepping) * o.stepping;
value = this.translateValue(value);
if(value >= this.size - this.handleSize()) value = this.size - this.handleSize();
if(value <= 0) value = 0;
if(this.rangeElement) {
if(this.currentHandle[0] == this.handle[0] && value >= this.translateValue(this.value(1))) value = this.translateValue(this.value(1));
if(this.currentHandle[0] == this.handle[1] && value <= this.translateValue(this.value(0))) value = this.translateValue(this.value(0));
}
this.currentHandle.css(this.properties[0], value);
if(this.rangeElement) this.updateRange();
this.propagate('start', null);
this.propagate('stop', null);
this.propagate('change', null);
}
});
})(jQuery);
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