<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
body{ background:black;}
#c1{ background:white;}
</style>
<script>
window.onload = function(){
var oC = document.getElementById('c1');
var oGC = oC.getContext('2d'); oGC.fillRect(0,0,100,100); oGC.fillStyle = 'red';
oGC.globalAlpha = 0.5; oGC.fillRect(50,50,100,100); };
</script>
</head> <body>
<canvas id="c1" width="400" height="400"></canvas>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
body{ background:black;}
#c1{ background:white;}
</style>
<script>
window.onload = function(){
var oC = document.getElementById('c1');
var oGC = oC.getContext('2d'); oGC.fillRect(0,0,100,100); oGC.fillStyle = 'red'; oGC.globalCompositeOperation = 'xor'; oGC.fillRect(50,50,100,100); };
</script>
</head> <body>
<canvas id="c1" width="400" height="400"></canvas>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
body{ background:black;}
#c1{ background:white;}
#img1{ background:white;}
</style>
<script>
window.onload = function(){
var oImg = document.getElementById('img1');
var oC = document.getElementById('c1');
var oGC = oC.getContext('2d'); oGC.fillRect(0,0,100,100); oGC.fillStyle = 'red'; oGC.globalCompositeOperation = 'xor'; oGC.fillRect(50,50,100,100); //alert( oC.toDataURL() ); oImg.src = oC.toDataURL();
};
</script>
</head> <body>
<canvas id="c1" width="400" height="400"></canvas>
<img id="img1" src="" />
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
body{ background:black;}
#c1{ background:white;}
#img1{ background:white;}
</style>
<script>
window.onload = function(){
var oImg = document.getElementById('img1');
var oC = document.getElementById('c1');
var oGC = oC.getContext('2d'); oGC.beginPath();
oGC.arc(100,100,50,0,360*Math.PI/180,false);
oGC.closePath();
oGC.fill(); oC.onmousedown = function(ev){
var ev = ev || window.event;
var x = ev.clientX - oC.offsetLeft;
var y = ev.clientY - oC.offsetTop; if( oGC.isPointInPath(x,y) ){
alert(123);
}
}; };
</script>
</head> <body>
<canvas id="c1" width="400" height="400"></canvas>
<img id="img1" src="" />
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
body{ background:black;}
#c1{ background:white;}
#img1{ background:white;}
</style>
<script>
window.onload = function(){
var oImg = document.getElementById('img1');
var oC = document.getElementById('c1');
var oGC = oC.getContext('2d'); oGC.beginPath();
oGC.arc(100,100,50,0,360*Math.PI/180,false);
oGC.closePath();
oGC.fill(); oGC.beginPath();
oGC.arc(200,200,50,0,360*Math.PI/180,false);
oGC.closePath();
oGC.fill(); oC.onmousedown = function(ev){
var ev = ev || window.event;
var x = ev.clientX - oC.offsetLeft;
var y = ev.clientY - oC.offsetTop; if( oGC.isPointInPath(x,y) ){//isPointInPath只作用于最后画出来的oGC
alert(123);
}
}; };
</script>
</head> <body>
<canvas id="c1" width="400" height="400"></canvas>
<img id="img1" src="" />
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
body{ background:black;}
#c1{ background:white;}
#img1{ background:white;}
</style>
<script>
window.onload = function(){
var oImg = document.getElementById('img1');
var oC = document.getElementById('c1');
var oGC = oC.getContext('2d'); var c1 = new Shape(100,100,50);
var c2 = new Shape(200,200,50); oC.onmousedown = function(ev){
var ev = ev || window.event;
var point = {
x : ev.clientX - oC.offsetLeft,
y : ev.clientY - oC.offsetTop
};
c1.reDraw(point);
c2.reDraw(point);
}; c1.click = function(){
alert(123);
}; c2.click = function(){
alert(456);
}; function Shape(x,y,r){//构造函数
this.x = x;
this.y = y;
this.r = r;
oGC.beginPath();
oGC.arc(this.x,this.y,this.r,0,360*Math.PI/180,false);
oGC.closePath();
oGC.fill();
}
Shape.prototype.reDraw = function(point){//构造函数添加方法
oGC.beginPath();
oGC.arc(this.x,this.y,this.r,0,360*Math.PI/180,false);
oGC.closePath();
oGC.fill();
if( oGC.isPointInPath(point.x,point.y) ){
this.click();
}
};
};
</script>
</head> <body>
<canvas id="c1" width="400" height="400"></canvas>
<img id="img1" src="" />
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
body{ background:black;}
#c1{ background:white;}
</style>
<script type="text/javascript" src="jCanvaScript.1.5.18.min.js"></script> //画布的js
<script>
window.onload = function(){ var oC = document.getElementById('c1');
var oGC = oC.getContext('2d'); jc.start('c1',true); //开始,第二个参数:代表重绘的意思,只有重绘了才有点击事件。 //jc.rect(100,100,50,50,'#ff0000',1);//画矩形
jc.circle(100,100,50,'#ff0000',1).click(function(){//画园,1表示填充,0表示不填充。
alert(123);
}); jc.start('c1');//闭合 };
</script>
</head> <body>
<canvas id="c1" width="400" height="400"></canvas>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
body{ background:black;}
#c1{ background:white;}
</style>
<script type="text/javascript" src="jCanvaScript.1.5.18.min.js"></script>
<script>
window.onload = function(){ var oC = document.getElementById('c1');
var oGC = oC.getContext('2d'); jc.start('c1',true); //第二个参数:代表重绘的意思 //jc.rect(100,100,50,50,'#ff0000',1);
jc.circle(100,100,50,'#ff0000',1).draggable();//拖拽了就可以拖着走了 jc.start('c1'); };
</script>
</head> <body>
<canvas id="c1" width="400" height="400"></canvas>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
body{ background:black;}
#c1{ background:white;}
</style>
<script type="text/javascript" src="jCanvaScript.1.5.18.min.js"></script>
<script>
window.onload = function(){
var oInput = document.getElementById('input1');
var oC = document.getElementById('c1');
var oGC = oC.getContext('2d'); jc.start('c1',true); //第二个参数:代表重绘的意思 //jc.rect(100,100,50,50,'#ff0000',1);
jc.circle(100,100,50,'#ff0000',1).id('c11');//给js加id为c11 jc.start('c1');//关闭,相当于close. oInput.onclick = function(){ jc('#c11').color('#ffff00');//通过#c11确定上面的js }; };
</script>
</head> <body>
<canvas id="c1" width="400" height="400"></canvas>
<input type="button" value="点击" id="input1" />
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
body{ background:black;}
#c1{ background:white;}
</style>
<script type="text/javascript" src="jCanvaScript.1.5.18.min.js"></script>
<script>
window.onload = function(){
var oInput = document.getElementById('input1');
var oC = document.getElementById('c1');
var oGC = oC.getContext('2d'); jc.start('c1',true); //第二个参数:代表重绘的意思 //jc.rect(100,100,50,50,'#ff0000',1);
jc.circle(100,100,50,'#ff0000',1).id('c1'); jc.start('c1'); oInput.onclick = function(){ jc('#c1').color('#ffff00').animate({x:200,y:200,radius:5},2000);//{x:200,y:200,radius:5}是一个json,radius表示半径变成5, }; };
</script>
</head> <body>
<canvas id="c1" width="400" height="400"></canvas>
<input type="button" value="点击" id="input1" />
</body>
</html>

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