<!DOCTYPE html>
<title></title>
<html>
<head>
<!-- 
Hinweis: Das Folgende stammt aus der Internetseite https://www.w3schools.com/graphics/tryit.asp?filename=trycanvas_clock_start.
Der bunte Stern gehört nicht dazu. 
//-->

<!--
Die Uhr ist in der Sternmitte beim Bildschirmformat 1920x1080. Bei anderen Formaten sind Abweichungen davon möglich.
//-->

<body bgcolor="bisque">

<div style="position:absolute; left:0.2%; top:2.5%;">
<img src="sternsep1.PNG">
</div>

<div style="position:absolute;left:9.6%; top:15%"><div>

<canvas id="canvas" width="123" height="120"
style="background-color:black">
</canvas>

<script>
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
var radius = canvas.height / 2;
ctx.translate(radius, radius);
radius = radius * 0.90
setInterval(drawClock, 1000);

function drawClock() {
  drawFace(ctx, radius);
  drawNumbers(ctx, radius);
  drawTime(ctx, radius);
}

function drawFace(ctx, radius) {
  var grad;
  ctx.beginPath();
  ctx.arc(0, 0, radius, 0, 2*Math.PI);
  ctx.fillStyle = 'antiquewhite';
  ctx.fill();
  grad = ctx.createRadialGradient(0,0,radius*0.95, 0,0,radius*1.05);
  grad.addColorStop(0, 'maroon');
  grad.addColorStop(0.5, 'lightgray');
  grad.addColorStop(1, 'black');
  ctx.strokeStyle = grad;
  ctx.lineWidth = radius*0.1;
  ctx.stroke();
  ctx.beginPath();
  ctx.arc(0, 0, radius*0.1, 0, 2*Math.PI);
  ctx.fillStyle = 'navy';
  ctx.fill();
}

function drawNumbers(ctx, radius) {
  var ang;
  var num;
  ctx.font = radius*0.15 + "px arial black";
  ctx.textBaseline="middle";
  ctx.textAlign="center";
  for(num = 1; num < 13; num++){
    ang = num * Math.PI / 6;
    ctx.rotate(ang);
    ctx.translate(0, -radius*0.85);
    ctx.rotate(-ang);
    ctx.fillText(num.toString(), 0, 0);
    ctx.rotate(ang);
    ctx.translate(0, radius*0.85);
    ctx.rotate(-ang);
  }
}

function drawTime(ctx, radius){
    var now = new Date();
    var hour = now.getHours();
    var minute = now.getMinutes();
    var second = now.getSeconds();
    //hour
    hour=hour%12;
    hour=(hour*Math.PI/6)+
    (minute*Math.PI/(6*60))+
    (second*Math.PI/(360*60));
    drawHand(ctx, hour, radius*0.5, radius*0.07);
    //minute
    minute=(minute*Math.PI/30)+(second*Math.PI/(30*60));
    drawHand(ctx, minute, radius*0.8, radius*0.07);
    // second
    second=(second*Math.PI/30);
    drawHand(ctx, second, radius*0.9, radius*0.02);
}

function drawHand(ctx, pos, length, width) {
    ctx.beginPath();
    ctx.lineWidth = width;
    ctx.lineCap = "round";
    ctx.moveTo(0,0);
    ctx.rotate(pos);
    ctx.lineTo(0, -length);
    ctx.stroke();
    ctx.rotate(-pos);
}
</script>
</div>
<br><br><br>


<font color="bisque">Quellen: <a href="https://www.w3schools.com/graphics/tryit.asp?filename=trycanvas_clock_start"><font color="bisque"><u>Uhr</u></a>&nbsp;<a href="stern sw.PNG">
<font color="bisque"><u>Stern</u></a>
</div>

<!--
<font color="bisque">Quellen: <a href="https://web.archive.org/web/20230331073119/https://www.w3schools.com/graphics/tryit.asp?filename=trycanvas_clock_start"><font color="bisque"><u>Uhr</u></a>&nbsp;<a href="stern sw.PNG">
<font color="bisque"><u>Stern</u></a>
</div>
//-->

function pickRandom(range) { 
if (Math.random) 
return Math.round(Math.random() * (range-1)); 
else { 
var now = new Date(); 
return (now.getTime() / 1000) % range; 
} 
} 
// Write out an IMG tag, using a randomly-chosen image name. 
var choice = pickRandom(ic); 
</script>

<!-- Datum, Uhrzeit, aus:
http://marco.seaside-graphics.de/programmierung/javascript/javascript-datum-und-uhrzeit-mit-sekundenanzeige-ausgeben, Marco Hofmann //-->

<div style="position:absolute; left:7.5%; top:40%;">    
    <meta charset="UTF-8">  
    <script language="javascript" type="text/javascript">    
       window.setInterval("zeitanzeige()",1000); 
       function zeitanzeige()
       {
        d = new Date ();
        h = (d.getHours () < 10 ? '0' + d.getHours () : d.getHours ());
        m = (d.getMinutes () < 10 ? '0' + d.getMinutes () : d.getMinutes ());
        s = (d.getSeconds () < 10 ? '0' + d.getSeconds () : d.getSeconds ()); 
        var wochentage = new Array ("Sonntag", "Montag","Dienstag",
        "Mittwoch", "Donnerstag", "Freitag","Samstag"); 
        var monate = new Array ("Januar", "Februar", "M&auml;rz", "April",
        "Mai", "Juni", "Juli", "August", "September",
        "Oktober", "November", "Dezember");
        document.getElementById("zeit").innerHTML = '<font color="maroon"><span style="font-size:16px">'
        + wochentage[d.getDay ()]
        + ', ' + d.getDate () + '. '
        + monate[d.getMonth ()] + ' '
        + d.getFullYear () +
        '';
       }
    </script>
 
<br>
 <span style="font-size:11pt; font-family:Calibri"><font color="darkblue">
    <span id="zeit"></span>
</div>

<div style="position:absolute; left:7.5%; top:50%;">
<span style="font-size:17px; font-family:Calibri">    
<a href="../anfang.htm"><font color="maroon"><u>Zurück zur Eingangsseite</u></a>
</div>

<span style="font-size:17px; font-family:Calibri">

<div style="position:absolute;left:35%; top:4%">
<img src="praguhr.PNG"> &nbsp; Prag</div>

<div style="position:absolute;left:5%; top:80%">
Anm.: bei anderen Bidschirmformaten als hier (1920x1080)<br>
kann die Uhr außerhalb der Sternmitte sein.</div>

<br><br>
</body>
</html>