求仿百度地图鼠标替代滚动条左右上下拖动的JQ

乌哩码嗏 2015-08-19 12:40:06

现在有一副超大图片需在网页上呈现，因此想要做到类似百度地图那样的，没有滚动条，靠鼠标左右上下拖动来移动显示区域。
求实现的具体思路！？

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乌哩码嗏 2015-08-26

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已解决，给出代码如下：

<!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>
	<script type="text/javascript" src="jquery.min.js"></script>
	<script language="javascript">
		//设定整体框架适应屏幕大小
		function setFrame(){
			$("#dragWrap").width($('body').width());
			$("#dragBody").width($('body').width());
			$("#dragWrap").height($(document).height()-50);
		}
		
		$(document).ready(function (){
			setFrame();//加载时，重设框架高宽度
			
			//鼠标移动操作
			var drag = function drag(){
			 this.dragWrap = $("#dragWrap");
			this.init.apply(this,arguments);
			};
			drag.prototype = {
			  constructor:drag,
			  _dom : {},
			  _x : 0,
			  _y : 0,
			  _top :0,
			  _left: 0,
			  move : false,
			  down : false,
			  init : function () {
				this.bindEvent();
			  },
			  bindEvent : function () {
				var t = this;
				$('body').on('mousedown','#dragWrap',function(e){
				  e && e.preventDefault();
				  if ( !t.move) {
					t.mouseDown(e);
				  }
				});
				$('body').on('mouseup','#dragWrap',function(e){
				  t.mouseUp(e);
				});

				$('body').on('mousemove','#dragWrap',function(e){
				  if (t.down) {
					t.mouseMove(e);
				  }
				});
			  },
			  mouseMove : function (e) {
				e && e.preventDefault();
				this.move = true;
				var x = this._x - e.clientX,
					y = this._y - e.clientY,
					dom = $('#dragWrap');
				dom.scrollLeft(this._left + x);
				dom.scrollTop(this._top + y);
			  },
			  mouseUp : function (e) {
				e && e.preventDefault();
				this.move = false;
				this.down = false;
				this.dragWrap.css('cursor','');
			  },
			  mouseDown : function (e) {
				this.move = false;
				this.down = true;
				this._x = e.clientX;
				this._y = e.clientY;
				this._top = $('#dragWrap').scrollTop();
				this._left = $('#dragWrap').scrollLeft();
				this.dragWrap.css('cursor','move');
			  }
			};
			var drag = new drag();
			
		});
	</script>

	<style type="text/css">
		*{margin:0;padding:0;}
		html{background-color:#fff;}
		body{position:relative;height:100%;font-size:12px;font-family:"Microsoft YaHei";_font-family:"SimSun";}
		img,a:hover img{border:none;}
		a{text-decoration:none;color:#000;cursor:pointer;}
		ul,li{list-style:none;}
		#leftBar{width:0.9%;height:99.1%;top:0.9%;left:0.08%;}
		#dragWrap{position:relative;overflow:hidden;padding-top:50px;}
		#dragWrap img{vertical-align:top;}
		#dragBody{width:6974px;position:absolute;zoom:1;}
	</style>

</head>

<body>
	<div id="dragWrap">
		<div id="dragBody">
			<img src="big.jpg" style="width:6974px;height:4000px;" alt="" />
		</div>
	</div>
</body>
</html>

乌哩码嗏 2015-08-20