<!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>
<title>Draw rectangle</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<script src="jquery-1.6.2.min.js" type="text/javascript"></script>
<script src="jquery.ui.core.js" type="text/javascript"></script>
<script src="jquery.ui.widget.js" type="text/javascript"></script>
<script src="jquery.ui.mouse.js" type="text/javascript"></script>
<script src="jquery.ui.draggable.js" type="text/javascript"></script>
<link href="catch.css" rel="stylesheet" type="text/css";charset=gb2312/>
<script src="catch.js" type="text/javascript";charset=gb2312></script>
<!--[if gte IE 7]>
<style type="text/css">
</style>
<![endif]-->
</head>
<body>
<!-- header -->
<div id="header">
<label>Draw!</label>
</div>
<!-- content -->
<div id="content">
</div>
<!-- bottom -->
<div id="bottom">
</div>
</body>
</html>
//////////////////////////////////////////////////////////
$(function () {
//$("div[title=new_rect]").click(function(){alert("click");});
//$(".new_rect").draggable();
drow_rect("#content");
})
/////////////////////////////////////////////////////////
function drow_rect(the_id){//theid表示用作画布的层
var num=1;
var x_down=0,y_down=0;
var new_width=0,new_height=0;
var x_original=0,y_original=0;
var original_flag=true,down_flag=false;
var x_point=0,y_point=0;
var append_string;
var MouseDown=function(e){
down_flag=true;
x_down=e.pageX;
y_down=e.pageY;//记录鼠标的当前坐标
if(original_flag){//如果是第一次点击,把起始点的坐标记录到 x_original 和 y_original中
x_original=e.pageX;
y_original=e.pageY;
original_flag=false;
}
};
var MouseMove=function(e){
if(down_flag){//鼠标有移动
x_down=e.pageX;
y_down=e.pageY;
x_point=x_original;
y_point=y_original;
new_width=x_down-x_original;
if(new_width<0){//鼠标向左运动
new_width=-new_width;
x_point=x_down;
}
new_height=y_down-y_original;
if(new_height<0){ //鼠标向右运动
new_height=-new_height;
y_point=y_down;
}
$("div[name='"+num+"']").remove();//把前面的层删除，并在后面的代码中生成新的层
append_string="<div class='new_rect' style='left:"+x_point+"px;top:"+y_point+"px;"+"width:"+new_width+"px;height:"
+new_height+"px' name='"+num+"' title='第"+num+"个'></div>";
$(the_id).append(append_string);
}
}
$(the_id).bind("mousedown",MouseDown);
$(the_id).bind("mousemove",MouseMove);//事件绑定
$(the_id).mouseup(function(e){//松开鼠标左键，初始化标志位
down_flag=false;
original_flag=true;
$("div[name='"+num+"']").draggable();
$("div[name='"+num+"']").mousedown(function(){
$(this).addClass("mousedown");//添加阴影
$(the_id).unbind("mousedown",MouseDown);
$(the_id).unbind("mousemove",MouseMove);//取消事件绑定
});
$("div[name='"+num+"']").mouseup(function(){
$(this).removeClass("mousedown");//删除阴影
$(the_id).bind("mousedown",MouseDown);
$(the_id).bind("mousemove",MouseMove);//事件绑定
});
num++;
});
}
