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Base: Move fun canvas demo JavaScript to seperate file

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This will allow this demo to be reused for other tests.
This commit is contained in:
MacDue 2022-07-04 21:10:19 +01:00 • committed by Andreas Kling
parent b179d514d9
commit b21d95bbe3
2 changed files with 48 additions and 43 deletions
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45
Base/res/html/misc/demo.html
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@ -5,50 +5,9 @@
</head> </head>
<body> <body>
<canvas id=c width=400 height=300></canvas> <canvas id=c width=400 height=300></canvas>
<script src="fun-canvas.js"></script>
<script> <script>
c = document.getElementById("c"); makeFunCanvas("c")
ctx = c.getContext("2d");
ctx.fillStyle = 'black';
ctx.fillRect(0, 0, c.width, c.height);
pressed = false;
mouseX = 0;
mouseY = 0;
c.addEventListener("mousedown", function(e) {
// mousedown
pressed = true;
mouseX = e.offsetX;
mouseY = e.offsetY;
});
c.addEventListener("mouseup", function() {
// mouseup
pressed = false;
});
c.addEventListener("mousemove", function(e) {
// mousemove
mouseX = e.offsetX;
mouseY = e.offsetY;
});
function update() {
if (pressed) {
var r = Math.random() * 255;
var g = Math.random() * 255;
var b = Math.random() * 255;
var color = "rgb(" + ~~r + "," + ~~g + "," + ~~b + ")";
ctx.fillStyle = color;
const spread = 35;
var x = mouseX + (Math.random() * spread) - (spread / 2);
var y = mouseY + (Math.random() * spread) - (spread / 2);
var size = Math.random() * 8;
ctx.fillRect(x, y, size, size);
}
}
setInterval(update, 20);
</script> </script>
</body> </body>
</html> </html>

46
Base/res/html/misc/fun-canvas.js Normal file
View file

@ -0,0 +1,46 @@
const makeFunCanvas = canvasId => {
c = document.getElementById(canvasId);
ctx = c.getContext("2d");
ctx.fillStyle = "black";
ctx.fillRect(0, 0, c.width, c.height);
pressed = false;
mouseX = 0;
mouseY = 0;
c.addEventListener("mousedown", function (e) {
// mousedown
pressed = true;
mouseX = e.offsetX;
mouseY = e.offsetY;
});
c.addEventListener("mouseup", function () {
// mouseup
pressed = false;
});
c.addEventListener("mousemove", function (e) {
// mousemove
mouseX = e.offsetX;
mouseY = e.offsetY;
});
function update() {
if (pressed) {
var r = Math.random() * 255;
var g = Math.random() * 255;
var b = Math.random() * 255;
var color = "rgb(" + ~~r + "," + ~~g + "," + ~~b + ")";
ctx.fillStyle = color;
const spread = 35;
var x = mouseX + Math.random() * spread - spread / 2;
var y = mouseY + Math.random() * spread - spread / 2;
var size = Math.random() * 8;
ctx.fillRect(x, y, size, size);
}
}
setInterval(update, 20);
};