var window_width=1024;
var window_height=768;
var radius=8;
var margin_left=30
var margin_top=60;
const endTime = new Date(2016,8,21,23,22,52);
var curShowTimeSeconds = 0;
function getTimeSeconds(){
var now=new Date();
var ret=parseInt(endTime.getTime()-now.getTime());
ret = Math.round( ret/1000 );
return ret;
}
function render(cxt){
cxt.clearRect(0,0,window_width,window_height);
var hours = parseInt( curShowTimeSeconds / 3600);
var minutes=parseInt((curShowTimeSeconds - hours * 3600)/60);
var seconds=curShowTimeSeconds % 60;
renderDigit(margin_left,margin_top,parseInt(hours/10),cxt);
renderDigit(margin_left+15*(radius+1),margin_top,parseInt(hours%10),cxt);
renderDigit(margin_left+30*(radius+1),margin_top,10,cxt);
renderDigit(margin_left+39*(radius+1),margin_top,parseInt(minutes/10),cxt);
renderDigit(margin_left+54*(radius+1),margin_top,parseInt(minutes%10),cxt);
renderDigit(margin_left+69*(radius+1),margin_top,10,cxt);
renderDigit(margin_left+78*(radius+1),margin_top,parseInt(seconds/10),cxt);
renderDigit(margin_left+93*(radius+1),margin_top,parseInt(seconds%10),cxt);
}
function renderDigit(x,y,num,cxt){
cxt.fillStyle="rgb(0,102,233)";
for( var i = 0 ; i < digit[num].length ; i ++ ){
for(var j = 0 ; j < digit[num][i].length ; j ++ ){
if(digit[num][i][j]==1){
cxt.beginPath();
cxt.arc(x+2*j*(radius)+(radius+1),y+2*i*(radius+1)+(radius+1),radius,0,2*Math.PI);
cxt.closePath();
cxt.fill();
}
}
}
}
function update(){
var nextTimeShow=getTimeSeconds();
var nextHours=parseInt( nextTimeShow / 3600);
var nextMinutes=parseInt((nextTimeShow - nextHours * 3600)/60);
var nextSeconds=nextTimeShow % 60;
var curHours=parseInt( curShowTimeSeconds / 3600);
var curMinutes=parseInt((curShowTimeSeconds - curHours * 3600)/60);
var curSeconds=curShowTimeSeconds % 60;
if(nextSeconds != curSeconds){
curSeconds=nextSeconds;
}
}
window.onload=function(){
var canvas=document.getElementById('canvas');
var context = canvas.getContext("2d");
canvas.width=window_width;
canvas.height=window_height;
curShowTimeSeconds = getTimeSeconds();
setInterval(function(){
render(context)
update()
},50);
}