76 lines
1.4 KiB
HTML
76 lines
1.4 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3c.org/1999/xhtml">
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<head>
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<title>CanvasDraw :: Paintbrush</title>
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<style type='text/css'>
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* {
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margin:0;
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padding:0;
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}
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canvas {
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position:absolute;
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top:50%;
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left:50%;
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margin-top:-200px;
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margin-left:-320px;
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border:1px solid #000;
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}
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</style>
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<script type='text/javascript'>
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function getwh() {
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if (self.innerHeight) {
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h=self.innerHeight
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w=self.innerWidth
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}
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else if (document.documentElement && document.documentElement.clientHeight) {
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h=document.documentElement.clientHeight
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w=document.documentElement.clientHeight
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}
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else if (document.body) {
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h=document.body.clientHeight
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w=document.body.clientWidth
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}
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}
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function ani() {
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var ctx = document.getElementById('canvas').getContext('2d');
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if (click) {
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ctx.beginPath()
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ctx.moveTo(ox,oy)
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ctx.lineTo(x,y)
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ctx.stroke()
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}
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ox=x
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oy=y
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setTimeout("ani()",1)
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}
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function load() {
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x=0
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y=0
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ox=0
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oy=0
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click=false
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ani()
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}
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function mm(e) {
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getwh()
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x=Math.floor(e.pageX-(w-642)/2-2)
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y=Math.floor(e.pageY-(h-402)/2-2)
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}
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window.onload=load
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document.onmousemove=mm
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document.onmousedown=function(){click=true}
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document.onmouseup=function(){click=false}
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</script>
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</head>
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<body>
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<canvas id='canvas' width='640' height='400'></canvas>
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</body>
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</html>
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