/**
* Created by Administrator on 2016/5/25.
*/
var WINDOW_WIDTH=1200;
var WINDOW_HEIGHT=600;
var RADIUS=8;
var MARGIN_LEFT=30;
var MARGIN_TOP=60;
const endTime=new Date(2016,4,31,21,36,36);
var curShowTimeSeconds=0;

window.onload=function(){
? ?var canvas=document.getElementById('canvas');
? ?var context=canvas.getContext("2d");

? ?canvas.width=WINDOW_WIDTH;
? ?canvas.height=WINDOW_HEIGHT;

? ?curShowTimeSeconds=getCurrentShowTimeSeconds();
? ?//render(context);
? ?setInterval(
? ? ? ?function () {
? ? ? ? ? ?render(context);
? ? ? ? ? ?update();
? ? ? ?}
? ? ? ?,
? ? ? ?50
? ?);
};
function update() {
? ?var nextShowTimeSeconds=getCurrentShowTimeSeconds();

? ?var nextHours=parseInt(nextShowTimeSeconds/3600);
? ?var nextMinutes=parseInt((nextShowTimeSeconds-nextHours*3600)/60);
? ?var nextSeconds=nextShowTimeSeconds%60;

? ?var curHours=parseInt(curShowTimeSeconds/3600);
? ?var curMinutes=parseInt((curShowTimeSeconds-curHours*3600)/60);
? ?var curSeconds=curShowTimeSeconds%60;

? ?if(nextSeconds!=curSeconds){
? ? ? ?curShowTimeSeconds=nextShowTimeSeconds;
? ?}
}
function getCurrentShowTimeSeconds() {
? ?var curTime=new Date();
? ?var ret=endTime.getTime()-curTime.getTime();
? ?ret=Math.round(ret/1000);

? ?return ret>=0?ret:0;
}
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(minutes%10),cxt);
}

function renderDigit(x,y,num,cxt) {
? ?cxt.fillStyle="rgb(0,102,153)";

? ?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 + j * 2 * (RADIUS + 1) + (RADIUS + 1), y + i * 2 * (RADIUS + 1) + (RADIUS + 1),
? ? ? ? ? ? ? ? ? ?RADIUS, 0, 2 * Math.PI);
? ? ? ? ? ? ? ?cxt.closePath();

? ? ? ? ? ? ? ?cxt.fill();
? ? ? ? ? ?}
}