(function() {
/**
* WlCounter pure JS class
*
* @class WlCounter
* @Author: Wiktor Lis
*/
var WlCounter = function(){
// date settings - REMEMBER months in Date object are counted as an Array from 0! So months range is between 0 to 11. Other than that everything is just as you would expect it to be.
this.setEventDate(new Date(2017, 03, 22, 22, 5, 0), 'Curently Unused'); // NOTE! months are represented from 0 to 11 in Date objects
this.setEventEndDate(new Date(2019, 04, 03, 22, 9, 0), 'Curently Unused', 'Curently Unused'); // NOTE! months are represented from 0 to 11 in Date objects
// CLOCK SETTINGS
// clock size
this.container = {
x: 0,
y: 0,
w: 150,
h: 150
};
// ring stroke
this.stroke = this.container.w / 10;
// number font size
this.numFontSize = this.container.w / 6 +'px';
// label font size
this.labelFontSize = this.container.w / 10 +'px';
// colors
this.colorRing = "hsla(355, 0%, 90%, 1)";
this.colorActive = "hsla(355, 100%, 50%, 1)";
this.colorTimedOut = "hsla(355, 0%, 50%, 0.3)";
// OTHER
// init objets
this.curent = {};
this.counter = {};
}
/**
* This method creates canvas based on css id
*
* @method createCanvas
* @param {String} cssId of canvas DOM object
*/
WlCounter.prototype.createCanvas = function(cssId){
this.canvas = document.getElementById(cssId);
this.canvas.setAttribute("width", this.container.w);
this.canvas.setAttribute("height", this.container.h);
this.c = this.canvas.getContext('2d');
return this.c
}
/**
* Init all canvas objects and start counting down
*
* @method init
*/
WlCounter.prototype.init = function(){
this.daysBox = this.createCanvas('canvas-d');
this.hoursBox = this.createCanvas('canvas-h');
this.minutesBox = this.createCanvas('canvas-m');
this.secoundsBox = this.createCanvas('canvas-s');
this.msBox = this.createCanvas('canvas-ms');
this.startCounting();
this.intervalClock();
}
/**
* Assign curent time to class properities
*
* @method getTime
*/
WlCounter.prototype.getTime = function() {
this.curent.time = new Date();
this.curent.days = this.curent.time.getDay();
this.curent.hours = this.curent.time.getHours();
this.curent.minutes = this.curent.time.getMinutes();
this.curent.seconds = this.curent.time.getSeconds();
this.curent.milliseconds = this.curent.time.getMilliseconds();
}
/**
* Creates event start date // and its message
*
* @method setEventDate
* @param {Object Date} date - defines event start date
* @param {String} messageBefore - curently unused
*/
WlCounter.prototype.setEventDate = function(date, messageBefore) {
this.eventStarts = date;
this.messageBefore = messageBefore;
}
/**
* Define event end date
*
* @method setEventEndDate
* @param {Object Date} date
* @param {String} messageDuring
* @param {String} messageAfter
*/
WlCounter.prototype.setEventEndDate = function(date, messageDuring, messageAfter) {
this.eventEnds = date;
this.messageDuring = messageDuring;
this.messageAfter = messageAfter;
}
/**
* Substract curent time from event date and define how many of days, hours, min, s, ms are left
* If event starts counter finished -> change counter color to greenish (hsla(160, 100%, 38%, 1)) and count to events End time.
*
* @method startCounting
*/
WlCounter.prototype.startCounting = function() {
this.intervalToEvent = setInterval(function() {
this.getTime();
if (this.curent.time < this.eventStarts) {
this.subject = this.eventStarts;
} else if(this.curent.time < this.eventEnds) {
// change colors
this.colorActive = "hsla(160, 100%, 38%, 1)";
this.subject = this.eventEnds;
} else {
this.stagnate();
return;
}
var until = this.subject - this.curent.time;
this.counter.ms = Math.floor(until % 1000);
this.counter.sec = Math.floor(until / (1000) % 60);
this.counter.min = Math.floor(until / (1000 * 60) % 60);
this.counter.hours = Math.floor(until / (1000 * 60 * 60 ) % 24);
this.counter.days = Math.floor(until / (1000 * 60 * 60 * 24));
// console.log(this.counter);
}.bind(this), 16.666);
}
/**
* If counter will go pass the event start and end date, simply stagneta the clock assigning 0 to each clock
*
* @method stagnate
*/
WlCounter.prototype.stagnate = function() {
clearInterval(this.intervalToEvent);
this.counter.ms = 0;
this.counter.sec = 0;
this.counter.min = 0;
this.counter.hours = 0;
this.counter.days = 0;
}
/**
* Convert deg to radians
*
* @method degToRad
* @param {Integer} deg
*/
WlCounter.prototype.degToRad = function(deg) {
radians = Math.PI / 180;
return radians * deg;
}
/**
* Draw the clock and sign it with the text from the @param2
*
* @method drawClock
* @param {Object} ctx - canvas selection
* @param {Array} timeUnit - example [this.counter.days, 365, 'D'] -> [0] counter number of days -> [1] max days for the clock to count down -> [2] Title that will be assign to the clock under the number
*/
WlCounter.prototype.drawClock = function(ctx, timeUnit) {
// background - gradient
gradient = ctx.createRadialGradient(this.container.w/2, this.container.h/2, 55, this.container.w/2, this.container.h/2, this.container.w/2);
gradient.addColorStop(1, 'rgba(245,245,245, 0.1)');
gradient.addColorStop(0, 'white');
// canvas rect
// ctx.fillStyle = "white";
ctx.fillStyle = gradient;
ctx.fillRect(0,0,this.container.w, this.container.h);
// clock rim
ctx.beginPath();
ctx.strokeStyle = this.colorRing;
ctx.lineWidth = this.container.w / 18;
ctx.arc(this.container.w/2, this.container.h/2,this.container.h/2-this.stroke, this.degToRad(270), this.degToRad(0 - 90));
ctx.stroke();
// clock time
ctx.beginPath();
// ctx.shadowBlur = this.stroke-10;
// ctx.shadowColor = "hsla(355, 100%, 0%, 0.2)";
// ring countdown
// ctx.lineCap = "round";
ctx.strokeStyle = this.colorActive;
if(timeUnit[0] == 0) ctx.shadowColor = ctx.strokeStyle = this.colorTimedOut; // if time is 0 set color to gray
ctx.lineWidth = this.stroke;
// draw ring countdown
ctx.arc(this.container.w/2, this.container.h/2,this.container.h/2-this.stroke, this.degToRad(270), this.degToRad(360 * timeUnit[0] / timeUnit[1] - 90));
// text - number
ctx.font = this.numFontSize+" Arial";
ctx.textAlign = 'center';
ctx.textBaseline = 'middle';
ctx.fillStyle = this.colorActive;
if(timeUnit[0] == 0) ctx.fillStyle = this.colorTimedOut;
if(timeUnit[1] == 60000) timeUnit[0] = Math.round(timeUnit[0]/1000);
ctx.fillText(timeUnit[0],this.container.w/2,this.container.h/2);
// text - label
ctx.font = this.labelFontSize+" Arial";
ctx.textAlign = 'center';
ctx.textBaseline = 'middle';
ctx.fillText(timeUnit[2],this.container.w/2,this.container.h/2 + (this.container.w / 5));
// draw!
ctx.stroke();
}
/**
* Set interval to draw clock around 60 frames per seckound (1s / 60 = 16.666)
*
* @method intervalClock
*/
WlCounter.prototype.intervalClock = function() {
var interval = setInterval(function(){
// cl(this.counter.ms);
this.drawClock(this.daysBox, [this.counter.days, 365, 'D']);
this.drawClock(this.hoursBox, [this.counter.hours, 24, 'H']);
this.drawClock(this.minutesBox, [this.counter.min, 60, 'M']);
this.drawClock(this.secoundsBox, [this.counter.sec, 60, 'S']);
this.drawClock(this.msBox, [this.counter.ms, 1000, 'ms']);
}.bind(this), 16.666);
}
/* RUN WlCounter */
var counter = new WlCounter();
// FUTURE -> To Do
// set event start and end
// counter.setEventStart(foo);
// counter.setEventEnd(foo);
// counter.onEventStart(function(){
// ...
// });
// counter.onEventEnd(function({
// ...
// });
counter.init();
})();
* {
padding: 0px;
margin: 0px;
text-decoration: none;
border: none;
}
html, body {
position: relative;
padding-top: 20px;
margin: 0 auto;
}
#wrap, .text {
width: 770px;
margin: auto;
}
canvas {
box-sizing: border-box;
border-bottom: 5px solid gray;
height: 100%;
}
h1, p {
font-weight: 400;
color: #666;
font-size: 2.5em;
width: 100%;
text-align: center;
}
p {
font-size: 1em;
text-align: left;
}
ul ol {
padding-left: 20px;
list-style-type: decimal;
line-height: 2em;
}
<div class="text">
<h1>"WlCounter" pure JS class</h1>
</div>
<div id="wrap">
<canvas id="canvas-d"></canvas>
<canvas id="canvas-h"></canvas>
<canvas id="canvas-m"></canvas>
<canvas id="canvas-s"></canvas>
<canvas id="canvas-ms"></canvas>
</div>
<div class="text">
<p>JS WlCounter class counts-down to the event starting and ending date with color change on reaching the first one. After event start date is reached it changes the color to green and start count-down to events end date (if end date was specyfied and is more then curent time). So when event is ended, counter gets graied out and set 0</p>
</div>