summaryrefslogtreecommitdiffstats
path: root/examples/script/context2d/scripts/clock.js
diff options
context:
space:
mode:
Diffstat (limited to 'examples/script/context2d/scripts/clock.js')
-rw-r--r--examples/script/context2d/scripts/clock.js99
1 files changed, 99 insertions, 0 deletions
diff --git a/examples/script/context2d/scripts/clock.js b/examples/script/context2d/scripts/clock.js
new file mode 100644
index 0000000..ad287d8
--- /dev/null
+++ b/examples/script/context2d/scripts/clock.js
@@ -0,0 +1,99 @@
+function init(){
+ clock();
+ setInterval('clock()',1000);
+}
+function clock(){
+ var now = new Date();
+ var ctx = document.getElementById('tutorial').getContext('2d');
+ ctx.save();
+ ctx.clearRect(0,0,150,150);
+ ctx.translate(75,75);
+ ctx.scale(0.4,0.4);
+ ctx.rotate(-Math.PI/2);
+ ctx.strokeStyle = "black";
+ ctx.fillStyle = "white";
+ ctx.lineWidth = 8;
+ ctx.lineCap = "round";
+
+ // Hour marks
+ ctx.save();
+ ctx.beginPath();
+ for (i=0;i<12;i++){
+ ctx.rotate(Math.PI/6);
+ ctx.moveTo(100,0);
+ ctx.lineTo(120,0);
+ }
+ ctx.stroke();
+ ctx.restore();
+
+ // Minute marks
+ ctx.save();
+ ctx.lineWidth = 5;
+ ctx.beginPath();
+ for (i=0;i<60;i++){
+ if (i%5!=0) {
+ ctx.moveTo(117,0);
+ ctx.lineTo(120,0);
+ }
+ ctx.rotate(Math.PI/30);
+ }
+ ctx.stroke();
+ ctx.restore();
+
+ var sec = now.getSeconds();
+ var min = now.getMinutes();
+ var hr = now.getHours();
+ hr = hr>=12 ? hr-12 : hr;
+
+ ctx.fillStyle = "black";
+
+ // write Hours
+ ctx.save();
+ ctx.rotate( hr*(Math.PI/6) + (Math.PI/360)*min + (Math.PI/21600)*sec )
+ ctx.lineWidth = 14;
+ ctx.beginPath();
+ ctx.moveTo(-20,0);
+ ctx.lineTo(80,0);
+ ctx.stroke();
+ ctx.restore();
+
+ // write Minutes
+ ctx.save();
+ ctx.rotate( (Math.PI/30)*min + (Math.PI/1800)*sec )
+ ctx.lineWidth = 10;
+ ctx.beginPath();
+ ctx.moveTo(-28,0);
+ ctx.lineTo(112,0);
+ ctx.stroke();
+ ctx.restore();
+
+ // Write seconds
+ ctx.save();
+ ctx.rotate(sec * Math.PI/30);
+ ctx.strokeStyle = "#D40000";
+ ctx.fillStyle = "#D40000";
+ ctx.lineWidth = 6;
+ ctx.beginPath();
+ ctx.moveTo(-30,0);
+ ctx.lineTo(83,0);
+ ctx.stroke();
+ ctx.beginPath();
+ ctx.arc(0,0,10,0,Math.PI*2,true);
+ ctx.fill();
+ ctx.beginPath();
+ ctx.arc(95,0,10,0,Math.PI*2,true);
+ ctx.stroke();
+ ctx.fillStyle = "#555";
+ ctx.arc(0,0,3,0,Math.PI*2,true);
+ ctx.fill();
+ ctx.restore();
+
+ ctx.beginPath();
+ ctx.lineWidth = 14;
+ ctx.strokeStyle = '#325FA2';
+ ctx.arc(0,0,142,0,Math.PI*2,true);
+ ctx.stroke();
+
+ ctx.restore();
+}
+init();