<html>
<head>
<title>鼠标事件</title>
<script>
var ctx;
var linew=10;
var color="rgb(255,0,0)";
var isClick;
var mx=50;
var my=200;
var tid;
function setstyle(w,c){
ctx.lineWidth = w;
ctx.strokeStyle = c;
}
function getpoint(ev){
if(ev.layerX ||ev.layerX ==0)
{
mx = ev.layerX;
my = ev.layerY;
}
else if(ev.offsetX || ev.offsetX == 0 )
{
mx = ev.offsetX;
my = ev.offsetY;
}
}
function drawall(){
ctx.clearRect(0,0,400,400);
setstyle(linew,color);
ctx.beginPath();
ctx.moveTo(50,200);
ctx.lineTo(mx,my);
ctx.lineTo(350,200);
ctx.stroke();
setstyle(2,"rgb(0,0,0)");
ctx.strokeRect(0,0,400,400);
}
function init(){
isClick = false;
ctx=document.getElementById('canvas').getContext('2d
HTML5实现一根拉伸的橡皮筋
最新推荐文章于 2024-05-01 18:38:51 发布