var WINDOW_WIDTH = 1024;
var WINDOW_HEIGHT = 768;
var RADIUS = 8;
var MARGIN_TOP = 60;
var MARGIN_LEFT = 30;
const endTime = new Date(2017,8,9,16,47,52);
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();
setInterval(
function(){
render(context);
update();
}
,
1000
);
}
function getCurrentShowTimeSeconds() {
var curTime = new Date();
var ret = endTime.getTime() - curTime.getTime();
ret = Math.round( ret/1000 )
return ret >= 0 ? ret : 0;
}
function update(){
var nextShowTimeSeconds = getCurrentShowTimeSeconds();
var nextHours = parseInt( nextShowTimeSeconds / 3600);
var nextMinutes = parseInt( (nextShowTimeSeconds - hours * 3600)/60 );
var nextSeconds = nextShowTimeSeconds % 60;
var curHours = parseInt( curShowTimeSeconds / 3600);
var curMinutes = parseInt( (curShowTimeSeconds - hours * 3600)/60 );
var curSeconds = curShowTimeSeconds % 60;
if(nextSeconds != curSeconds){
curShowTimeSeconds = nextShowTimeSeconds;
}
}
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(0,102,153)";
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()
}
}
