var W = window.innerWidth;
var H = window.innerHeight;
// Update new screen size when resize
$( window ).resize(function() {
W = window.innerWidth;
H = window.innerHeight;
});
var particles = [];
var _config = {
particle_count: 10,
minDelay: 1,
maxDelay: 60,
minDiameter: 5,
maxDiameter: 140,
delayMultiples: 50
};
function getRandom(min, max) {
return Math.random() * (max - min) + min;
}
function Particle() {
this.id = '';
this.x = function() {
return getRandom(0, W);
};
this.y = function() {
return getRandom(0, H);
};
this.diam = function() {
return getRandom(_config.minDiameter, _config.maxDiameter);
};
this.delay = function() {
return getRandom(_config.minDelay, _config.maxDelay) * _config.delayMultiples;
};
}
Particle.prototype.start = function() {
var newPar = this.createNewParticle();
this.addParticle(newPar);
return 1;
};
Particle.prototype.createNewParticle = function() {
var newPar = document.createElement('div');
newPar.setAttribute('id', this.id);
newPar.setAttribute('class', 'loading-icon');
newPar.style.width = newPar.style.height = this.diam() + 'px';
newPar.style.left = this.x() + 'px';
newPar.style.top = this.y() + 'px';
return newPar;
};
Particle.prototype.addParticle = function(newPar) {
var self = this;
setTimeout(function(){
$('body').append(newPar);
self.move();
}, self.delay());
return 1;
};
// Move to new position after 4 seconds
// Get new position to update
Particle.prototype.move = function() {
var self = this;
var id = this.id;
var newLeft = this.x();
var newTop = this.y();
var newWidth, newHeight;
newWidth = newHeight = this.diam();
setTimeout(function() {
var currentPar = $('#' + id);
currentPar.css({top: newTop, left: newLeft, width: newWidth, height: newHeight});
self.move();
}, 4000);
return 1;
};
// Create praticles list
for (var i = 0; i < _config.particle_count; i++) {
var particle = new Particle(i);
particles.push(particle);
}
particles.forEach(function(particle) {
var id = particles.indexOf(particle);
particle.id = 'particle-' + id;
var delay = particle.delay();
particle.start();
});
$(window).focus(function() {
console.log("Focus");
});
$(window).blur(function() {
console.log("Blur");
console.log(particles);
});