/*jshint multistr:true, curly: false */
/*global jQuery:false, define: false */
/**
* jRange - Awesome range control
*
* Written by
* ----------
* Nitin Hayaran (nitinhayaran@gmail.com)
*
* Licensed under the MIT (MIT-LICENSE.txt).
*
* @author Nitin Hayaran
* @version 0.1-RELEASE
*
* Dependencies
* ------------
* jQuery (http://jquery.com)
*
**/
;
(function($, window, document, undefined) {
'use strict';
var jRange = function(){
return this.init.apply(this, arguments);
};
jRange.prototype = {
defaults : {
onstatechange : function(){},
isRange : false,
showLabels : true,
showScale : true,
step : 1,
format: '%s',
theme : 'theme-green',
width : 300
},
template : '<div class="slider-container">\
<div class="back-bar">\
<div class="selected-bar"></div>\
<div class="pointer low"></div><div class="pointer-label">123456</div>\
<div class="pointer high"></div><div class="pointer-label">456789</div>\
<div class="clickable-dummy"></div>\
</div>\
<div class="scale"></div>\
</div>',
init : function(node, options){
this.options = $.extend({}, this.defaults, options);
this.inputNode = $(node);
this.options.value = this.inputNode.val() || (this.options.isRange ? this.options.from+','+this.options.from : this.options.from);
this.domNode = $(this.template);
this.domNode.addClass(this.options.theme);
this.inputNode.after(this.domNode);
this.domNode.on('change', this.onChange);
this.pointers = $('.pointer', this.domNode);
this.lowPointer = this.pointers.first();
this.highPointer = this.pointers.last();
this.labels = $('.pointer-label', this.domNode);
this.lowLabel = this.labels.first();
this.highLabel = this.labels.last();
this.scale = $('.scale', this.domNode);
this.bar = $('.selected-bar', this.domNode);
this.clickableBar = this.domNode.find('.clickable-dummy');
this.interval = this.options.to - this.options.from;
this.render();
},
render: function(){
// Check if inputNode is visible, and have some width, so that we can set slider width accordingly.
if( this.inputNode.width() === 0 && !this.options.width ){
console.log('jRange : no width found, returning');
return;
}else{
this.domNode.width( this.options.width || this.inputNode.width() );
this.inputNode.hide();
}
if(this.isSingle()){
this.lowPointer.hide();
this.lowLabel.hide();
}
if(!this.options.showLabels){
this.labels.hide();
}
this.attachEvents();
if(this.options.showScale){
this.renderScale();
}
this.setValue(this.options.value);
},
isSingle: function(){
if(typeof(this.options.value) === 'number'){
return true;
}
return (this.options.value.indexOf(',') !== -1 || this.options.isRange) ?
false : true;
},
attachEvents: function(){
this.clickableBar.click($.proxy(this.barClicked, this));
this.pointers.mousedown($.proxy(this.onDragStart, this));
this.pointers.bind('dragstart', function(event) { event.preventDefault(); });
},
onDragStart: function(e){
if(e.which !== 1){return;}
e.stopPropagation(); e.preventDefault();
var pointer = $(e.target);
pointer.addClass('focused');
this[(pointer.hasClass('low')?'low':'high') + 'Label'].addClass('focused');
$(document).on('mousemove.slider', $.proxy(this.onDrag, this, pointer));
$(document).on('mouseup.slider', $.proxy(this.onDragEnd, this));
},
onDrag: function(pointer, e){
e.stopPropagation(); e.preventDefault();
var position = e.clientX - this.domNode.offset().left;
this.domNode.trigger('change', [this, pointer, position]);
},
onDragEnd: function(){
this.pointers.removeClass('focused');
this.labels.removeClass('focused');
$(document).off('.slider');
$(document).off('.slider');
},
barClicked: function(e){
var x = e.pageX - this.clickableBar.offset().left;
if(this.isSingle())
this.setPosition(this.pointers.last(), x, true, true);
else{
var pointer = Math.abs(parseInt(this.pointers.first().css('left'), 10) - x + this.pointers.first().width() / 2) < Math.abs(parseInt(this.pointers.last().css('left'), 10) - x + this.pointers.first().width() / 2) ?
this.pointers.first() : this.pointers.last();
this.setPosition(pointer, x, true, true);
}
},
onChange: function(e, self, pointer, position){
var min, max;
if(self.isSingle()){
min = 0;
max = self.domNode.width();
}else{
min = pointer.hasClass('high')? self.lowPointer.position().left + self.lowPointer.width() / 2 : 0;
max = pointer.hasClass('low') ? self.highPointer.position().left + self.highPointer.width() / 2 : self.domNode.width();
}
var value = Math.min(Math.max(position, min), max);
self.setPosition(pointer, value, true);
},
setPosition: function(pointer, position, isPx, animate){
var leftPos,
lowPos = this.lowPointer.position().left,
highPos = this.highPointer.position().left,
circleWidth = this.highPointer.width() / 2;
if(!isPx){
position = this.prcToPx(position);
}
if(pointer[0] === this.highPointer[0]){
highPos = Math.round(position - circleWidth);
}else{
lowPos = Math.round(position - circleWidth);
}
pointer[animate?'animate':'css']({'left': Math.round(position - circleWidth)});
if(this.isSingle()){
leftPos = 0;
}else{
leftPos = lowPos + circleWidth;
}
this.bar[animate?'animate':'css']({
'width' : Math.round(highPos + circleWidth - leftPos),
'left' : leftPos
});
this.showPointerValue(pointer, position, animate);
},
// will be called from outside
setValue: function(value){
var values = value.toString().split(',');
this.options.value = value;
var prc = this.valuesToPrc( values.length === 2 ? values : [0, values[0]] );
if(this.isSingle()){
this.setPosition(this.highPointer, prc[1]);
}else{
this.setPosition(this.lowPointer, prc[0]);
this.setPosition(this.highPointer, prc[1]);
}
},
renderScale: function(){
var s = this.options.scale || [this.options.from, this.options.to];
var prc = Math.round((100 / (s.length - 1)) * 10) / 10;
var str = '';
for(var i = 0; i < s.length ; i++ ){
str += '<span style="left: ' + i * prc + '%">' + (s[i] != '|' ? '<ins>' + s[i] + '</ins>' : '') + '</span>';
}
this.scale.html(str);
$('ins', this.scale).each(function () {
$(this).css({
marginLeft: -$(this).outerWidth() / 2
});
});
},
getBarWidth: function(){
var values = this.options.value.split(',');
if(values.length > 1){
return parseInt(values[1], 10) - parseInt(values[0], 10);
}else{
return parseInt(values[0], 10);
}
},
showPointerValue: function(pointer, position, animate){
var label = $('.pointer-label', this.domNode)[pointer.hasClass('low')?'first':'last']();
var text;
var value = this.positionToValue(position);
if($.isFunction(this.options.format)){
var type = this.isSingle() ? undefined : (pointer.hasClass('low') ? 'low':'high');
text = this.options.format(value, type);
}else{
text = this.options.format.replace('%s', value);
}
var width = label.html(text).width(),
left = position - width / 2;
left = Math.min(Math.max(left, 0), this.options.width - width);
label[animate?'animate':'css']({left: left});
this.setInputValue(pointer, value);
},
valuesToPrc: function(values){
var lowPrc = ( ( values[0] - this.options.from ) * 100 / this.interval ),
highPrc = ( ( values[1] - this.options.from ) * 100 / this.interval );
return [lowPrc, highPrc];
},
prcToPx: function(prc){
return (this.domNode.width() * prc) / 100;
},
positionToValue: function(pos){
var value = (pos / this.domNode.width()) * this.interval;
value = value + this.options.from;
return Math.round(value / this.options.step) * this.options.step;
},
setInputValue: function(pointer, v){
// if(!isChanged) return;
if(this.isSingle()){
this.options.value = v.toString();
}else{
var values = this.options.value.split(',');
if(pointer.hasClass('low')){
this.options.value = v + ',' + values[1];
}else{
this.options.value = values[0] + ',' + v;
}
}
if( this.inputNode.val() !== this.options.value ){
this.inputNode.val(this.options.value);
this.options.onstatechange.call(this, this.options.value);
}
},
getValue: function(){
return this.options.value;
}
};
/*$.jRange = function (node, options) {
var jNode = $(node);
if(!jNode.data('jrange')){
jNode.data('jrange', new jRange(node, options));
}
return jNode.data('jrange');
};
$.fn.jRange = function (options) {
return this.each(function(){
$.jRange(this, options);
});
};*/
var pluginName = 'jRange';
// A really lightweight plugin wrapper around the constructor,
// preventing against multiple instantiations
$.fn[pluginName] = function(option) {
var args = arguments,
result;
this.each(function() {
var $this = $(this),
data = $.data(this, 'plugin_' + pluginName),
options = typeof option === 'object' && option;
if (!data) {
$this.data('plugin_' + pluginName, (data = new jRange(this, options)));
}
// if first argument is a string, call silimarly named function
// this gives flexibility to call functions of the plugin e.g.
// - $('.dial').plugin('destroy');
// - $('.dial').plugin('render', $('.new-child'));
if (typeof option === 'string') {
result = data[option].apply(data, Array.prototype.slice.call(args, 1));
}
});
// To enable plugin returns values
return result || this;
};
})(jQuery, window, document);
