我试图找到一种方法,我可以单击各个像素,然后像素的XY坐标将被记录/打印。我发现在线下面的代码,但它只显示最后点击的像素的坐标。有没有办法保存/打印我点击过的所有像素的坐标。我正在为Java applet做这件事,这会让我更容易制作多边形。 我宁愿输出(当我点击像素)是这样的,这样我就可以复制&粘贴到Java:记录像素onclick的XY坐标
int [] x={x1,x2,x3,x4,x...};
int [] y={y1,y2,y3,y4,y...};
这里是我发现的代码:
<html>
<head>
<script language="JavaScript">
function point_it(event){
\t pos_x = event.offsetX?(event.offsetX):event.pageX-document.getElementById("pointer_div").offsetLeft;
\t pos_y = event.offsetY?(event.offsetY):event.pageY-document.getElementById("pointer_div").offsetTop;
\t document.getElementById("cross").style.left = (pos_x-1) ;
\t document.getElementById("cross").style.top = (pos_y-15) ;
\t document.getElementById("cross").style.visibility = "visible" ;
\t document.pointform.form_x.value = pos_x;
\t document.pointform.form_y.value = pos_y;
}
</script>
</head>
<body>
<form name="pointform" method="post">
<div id="pointer_div" onclick="point_it(event)" style = "background-image:url('image.jpg');width:2400px;height:1848px;">
<img src="point.gif" id="cross" style="position:relative;visibility:hidden;z-index:2;"></div>
You pointed on x = <input type="text" name="form_x" size="4" /> - y = <input type="text" name="form_y" size="4" />
</form>
</body>
</html>
'document.pointform.form_x.value = pos_x; document.pointform.form_y.value = pos_y;'显示位置。这里是对javascript数组的描述:http://www.w3schools.com/js/js_arrays.asp – Sang