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StefanoCecere/.block

Last active September 11, 2017 16:06
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.Block text slideshow test
Raw
.block
license: gpl-3.0
height: 500
scrolling: no
border: yes
Raw
index.html
<!DOCTYPE html>
<meta charset="utf-8">
<canvas width="960" height="500"></canvas>
<script src="https://unpkg.com/d3-timer"></script>
<script>
var words = "Ciao this is a test sentence\nfor this block".split(/\s+/g);
var canvas = document.querySelector("canvas"),
canvas2 = canvas.cloneNode(),
context = canvas.getContext("2d"),
context2 = canvas2.getContext("2d");
width = canvas.width,
height = canvas.height;
context.font = context2.font = "300px Helvetica Neue";
context.textAlign = context2.textAlign = "center";
context.lineJoin = context2.lineJoin = "round";
(function next() {
var i = 0.5, text = words.shift();
context.clearRect(0, 0, width, height);
context.fillText(text, width / 2, height / 2 + 100);
var timer = d3.timer(function() {
if (++i > text.length * 20) return timer.stop(), next();
context2.save();
context2.clearRect(0, 0, width, height);
context2.lineWidth = i & 1 ? i * 5 + 3 : i * 5;
context2.strokeStyle = i & 1 ? "white" : "black";
context2.strokeText(text, width / 2, height / 2 + 100);
context2.restore();
context2.drawImage(canvas, 0, 0);
context.drawImage(canvas2, 0, 0);
});
})();
</script>
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