html5教程制作简单画板代码分享_html5教程技巧

代码如下:

http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js">





$(document).ready(function(){
var canvas=document.getElementById("draw");
var draw=canvas.getContext("2d");
draw.lineWidth=5; //线条粗细
draw.strokeStyle="red"; //颜色
var godraw=false;

//按下鼠标
$("#draw").mousedown(function(e){
//准确坐标
var mouseX=e.pageX-this.offsetLeft;
var mouseY=e.pageY-this.offsetTop;
draw.moveTo(mouseX,mouseY);
godraw=true;

})
//放开鼠标
$("#draw").mouseup(function(e){
godraw=false;
})
//移动鼠标
$("#draw").mousemove(function(e){
if(godraw){
var mouseX=e.pageX-this.offsetLeft;
var mouseY=e.pageY-this.offsetTop;
draw.lineTo(mouseX+4,mouseY+4);
draw.stroke();
}

})

})

效果图