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gwt.material.design.addins.client.countup.resources.js.countup.js Maven / Gradle / Ivy
/*
countUp.js
by @inorganik
*/
// target = id of html element or var of previously selected html element where counting occurs
// startVal = the value you want to begin at
// endVal = the value you want to arrive at
// decimals = number of decimal places, default 0
// duration = duration of animation in seconds, default 2
// options = optional object of options (see below)
var CountUp = function(target, startVal, endVal, decimals, duration, options) {
// make sure requestAnimationFrame and cancelAnimationFrame are defined
// polyfill for browsers without native support
// by Opera engineer Erik Möller
var lastTime = 0;
var vendors = ['webkit', 'moz', 'ms', 'o'];
for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
window.cancelAnimationFrame =
window[vendors[x]+'CancelAnimationFrame'] || window[vendors[x]+'CancelRequestAnimationFrame'];
}
if (!window.requestAnimationFrame) {
window.requestAnimationFrame = function(callback, element) {
var currTime = new Date().getTime();
var timeToCall = Math.max(0, 16 - (currTime - lastTime));
var id = window.setTimeout(function() { callback(currTime + timeToCall); },
timeToCall);
lastTime = currTime + timeToCall;
return id;
};
}
if (!window.cancelAnimationFrame) {
window.cancelAnimationFrame = function(id) {
clearTimeout(id);
};
}
var self = this;
// default options
self.options = {
useEasing : true, // toggle easing
useGrouping : true, // 1,000,000 vs 1000000
separator : ',', // character to use as a separator
decimal : '.', // character to use as a decimal
easingFn: null, // optional custom easing closure function, default is Robert Penner's easeOutExpo
formattingFn: null // optional custom formatting function, default is self.formatNumber below
};
// extend default options with passed options object
for (var key in options) {
if (options.hasOwnProperty(key)) {
self.options[key] = options[key];
}
}
if (self.options.separator === '') { self.options.useGrouping = false; }
if (!self.options.prefix) self.options.prefix = '';
if (!self.options.suffix) self.options.suffix = '';
self.d = (typeof target === 'string') ? document.getElementById(target) : target;
self.startVal = Number(startVal);
self.endVal = Number(endVal);
self.countDown = (self.startVal > self.endVal);
self.frameVal = self.startVal;
self.decimals = Math.max(0, decimals || 0);
self.dec = Math.pow(10, self.decimals);
self.duration = Number(duration) * 1000 || 2000;
self.formatNumber = function(nStr) {
nStr = nStr.toFixed(self.decimals);
nStr += '';
var x, x1, x2, rgx;
x = nStr.split('.');
x1 = x[0];
x2 = x.length > 1 ? self.options.decimal + x[1] : '';
rgx = /(\d+)(\d{3})/;
if (self.options.useGrouping) {
while (rgx.test(x1)) {
x1 = x1.replace(rgx, '$1' + self.options.separator + '$2');
}
}
return self.options.prefix + x1 + x2 + self.options.suffix;
};
// Robert Penner's easeOutExpo
self.easeOutExpo = function(t, b, c, d) {
return c * (-Math.pow(2, -10 * t / d) + 1) * 1024 / 1023 + b;
};
self.easingFn = self.options.easingFn ? self.options.easingFn : self.easeOutExpo;
self.formattingFn = self.options.formattingFn ? self.options.formattingFn : self.formatNumber;
self.version = function () { return '1.7.1'; };
// Print value to target
self.printValue = function(value) {
var result = self.formattingFn(value);
if (self.d.tagName === 'INPUT') {
this.d.value = result;
}
else if (self.d.tagName === 'text' || self.d.tagName === 'tspan') {
this.d.textContent = result;
}
else {
this.d.innerHTML = result;
}
};
self.count = function(timestamp) {
if (!self.startTime) { self.startTime = timestamp; }
self.timestamp = timestamp;
var progress = timestamp - self.startTime;
self.remaining = self.duration - progress;
// to ease or not to ease
if (self.options.useEasing) {
if (self.countDown) {
self.frameVal = self.startVal - self.easingFn(progress, 0, self.startVal - self.endVal, self.duration);
} else {
self.frameVal = self.easingFn(progress, self.startVal, self.endVal - self.startVal, self.duration);
}
} else {
if (self.countDown) {
self.frameVal = self.startVal - ((self.startVal - self.endVal) * (progress / self.duration));
} else {
self.frameVal = self.startVal + (self.endVal - self.startVal) * (progress / self.duration);
}
}
// don't go past endVal since progress can exceed duration in the last frame
if (self.countDown) {
self.frameVal = (self.frameVal < self.endVal) ? self.endVal : self.frameVal;
} else {
self.frameVal = (self.frameVal > self.endVal) ? self.endVal : self.frameVal;
}
// decimal
self.frameVal = Math.round(self.frameVal*self.dec)/self.dec;
// format and print value
self.printValue(self.frameVal);
// whether to continue
if (progress < self.duration) {
self.rAF = requestAnimationFrame(self.count);
} else {
if (self.callback) { self.callback(); }
}
};
// start your animation
self.start = function(callback) {
self.callback = callback;
self.rAF = requestAnimationFrame(self.count);
return false;
};
// toggles pause/resume animation
self.pauseResume = function() {
if (!self.paused) {
self.paused = true;
cancelAnimationFrame(self.rAF);
} else {
self.paused = false;
delete self.startTime;
self.duration = self.remaining;
self.startVal = self.frameVal;
requestAnimationFrame(self.count);
}
};
// reset to startVal so animation can be run again
self.reset = function() {
self.paused = false;
delete self.startTime;
self.startVal = startVal;
cancelAnimationFrame(self.rAF);
self.printValue(self.startVal);
};
// pass a new endVal and start animation
self.update = function (newEndVal) {
cancelAnimationFrame(self.rAF);
self.paused = false;
delete self.startTime;
self.startVal = self.frameVal;
self.endVal = Number(newEndVal);
self.countDown = (self.startVal > self.endVal);
self.rAF = requestAnimationFrame(self.count);
};
// format startVal on initialization
self.printValue(self.startVal);
};
