jqueryはドラッグ効果を実現します(コード共有)


話が多くないので、コードを見てください。

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>Document</title>
</head>
<body>
 <style type="text/css">
 .page{text-align:left;}
 .dragDiv{border:1px solid #ddd; padding:10px; width:300px; margin:0 auto; border-radius:4px; box-shadow:0 1px 2px #fefefe; position: fixed;}
 </style>
 <div class="dragDiv" id="drag">
 <div class="drag-head">      </div>
 <div class="drag-body">
        
 </div>
 </div>
</body>
<script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<script>
 var _drag = {};
 _drag.top = 0; //          
 _drag.left = 0; //          
 _drag.maxLeft; //         
 _drag.maxTop; //         
 _drag.dragging = false; //      
 //    
 function bindDrag(el){ 
 var winWidth = $(window).width(), winHeight =$(window).height(),objWidth = $(el).outerWidth(), objHeight = $(el).outerHeight();
 _drag.maxLeft = winWidth - objWidth, _drag.maxTop = winHeight - objHeight;
 var els = el.style,x=0,y=0;
 var objTop = $(el).offset().top, objLeft = $(el).offset().left;
 $(el).mousedown(function(e){ 
 _drag.dragging = true;
 _drag.isDragged = true;
 x = e.clientX - el.offsetLeft; 
 y = e.clientY - el.offsetTop; 
 el.setCapture && el.setCapture(); 
 $(document).bind('mousemove',mouseMove).bind('mouseup',mouseUp);
 return false;
 }); 
 function mouseMove(e){ 
 e = e || window.event;
 if(_drag.dragging){
 _drag.top = e.clientY - y; 
 _drag.left = e.clientX - x;
 _drag.top = _drag.top > _drag.maxTop ? _drag.maxTop : _drag.top;
 _drag.left = _drag.left > _drag.maxLeft ? _drag.maxLeft : _drag.left;
 _drag.top = _drag.top < 0 ? 0 : _drag.top;
 _drag.left = _drag.left <0 ? 0 : _drag.left;
 els.top = _drag.top + 'px'; 
 els.left = _drag.left+ 'px';
 return false;
 }
 } 
 function mouseUp(e){ 
 _drag.dragging = false; 
 el.releaseCapture && el.releaseCapture(); 
 e.cancelBubble = true;
 $(document).unbind('mousemove',mouseMove).unbind('mouseup',mouseUp); 
 }
 $(window).resize(function(){
 var winWidth = $(window).width(),
 winHeight = $(window).height(),
 el = $(el),
 elWidth = el.outerWidth(),
 elHeight = el.outerHeight(),
 elLeft = parseFloat(el.css('left')),
 elTop = parseFloat(el.css('top'));
 _drag.maxLeft = winWidth - elWidth;
 _drag.maxTop = winHeight - elHeight;
 _drag.top = _drag.maxTop < elTop ? _drag.maxTop : elTop;
 _drag.left = _drag.maxLeft < elLeft ? _drag.maxLeft : elLeft;
 el.css({
 top:_drag.top,
 left:_drag.left
 })
 })
 } 
 bindDrag(document.getElementById('drag'));
</script>
</html>
以上が本文の全部です。本文の内容は皆さんの学習や仕事に一定の助けをもたらしてくれると同時に、私達を応援してください。