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jquery.axis.js
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jquery.axis.js
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/*
* https://github.com/jmfairlie/jquery.axis
* A jQuery plugin to add graph axis like tickmarks to any container.
* by jmfairlie@gmail.com
*/
;(function($, window){
var pluginName = 'axis';
var defaults = {
numdecimals: 2
};
var template = '<div class="axis hAxis"></div>'
var Axis = function(element, options) {
var settings = $.extend({}, defaults, options);
this.$element = $(element);
this.elementId = element.id;
this.init(settings);
return {
update: this.update.bind(this),
recreate: this.recreate.bind(this)
};
};
Axis.prototype.recreate = function() {
if(typeof this.start !== 'undefined' && typeof this.length !== 'undefined') {
var $axis = this.$axis;
$axis.empty();
var npixels = $axis.width();
var ref = Math.pow(10, Math.round(Math.log10(this.length)));
var majf = 5;
var labf = 10;
// Horizontal axis ticks
var tickStep = ref/100;
var minor= tickStep*npixels/this.length;
var factor = Math.pow(2, Math.ceil(Math.log2(5/minor)));
tickStep*=factor;
minor = tickStep*npixels/this.length;
var major=minor*majf;
var label=minor*labf;
var tickLabelPos = 0;
var tickCount = this.start;
var newTickLabel = "";
var val;
var minorcount = 0;
while ( tickLabelPos <= npixels ) {
if ( minorcount%labf == 0 ) {
val = tickCount.toFixed(this.numdecimals);
val = val%1?val:Math.floor(val);
newTickLabel = `<div class='tickLabel'>${val}</div>`;
$(newTickLabel).css( "left", tickLabelPos+"px" ).appendTo($axis);
} else if ( minorcount%majf == 0) {
newTickLabel = "<div class='tickMajor'></div>";
$(newTickLabel).css("left",tickLabelPos+"px").appendTo($axis);
} else {
newTickLabel = "<div class='tickMinor'></div>";
$(newTickLabel).css( "left", tickLabelPos+"px" ).appendTo($axis);
}
minorcount++;
tickLabelPos += minor;
tickCount += tickStep;
}
}
}
Axis.prototype.update = function(start, length) {
this.start = start;
this.length = length;
this.recreate();
}
Axis.prototype.init = function(settings) {
var self = this;
this.start = settings.start;
this.length = settings.length;
this.numdecimals = settings.numdecimals;
this.$axis = $(template);
this.$element.append(this.$axis);
this.$element.on('update.axis', function(e, start, length) {
self.update(start, length);
});
this.recreate();
}
var logError = function (message) {
if (window.console) {
window.console.error(message);
}
};
//resize
$(window).resize(function(e) {
$('.hAxis').parent().axis('recreate');
});//resize
$.fn[pluginName] = function(options, args) {
var result;
this.each(function() {
//get Axis object if already exists
var _this = $.data(this, pluginName);
if(typeof options === 'string') {
if (!_this) {
logError('Not initialized, can not call method : ' + options);
}
else if (!$.isFunction(_this[options]) || options.charAt(0) === '_') {
logError('No such method : ' + options);
}
else {
if (!(args instanceof Array)) {
args = [ args ];
}
result = _this[options].apply(_this, args);
}
} else if(typeof options === 'boolean') {
result = _this;
} else {
$.data(this, pluginName, new Axis(this, $.extend(true, {}, options)));
}
});
return result || this;
};
})(jQuery, window);