jQuery UI 实例 – 拖动(Draggable)

允许使用鼠标移动元素。

如需了解更多有关 draggable 交互的细节,请查看 API 文档 可拖拽小部件(Draggable Widget)。

默认功能

在任意的 DOM 元素上启用 draggable 功能。通过鼠标点击并在视区中拖动来移动 draggable 对象。

<!doctype html>
<html lang=\"en\">
<head>
  <meta charset=\"utf-8\">
  <title>jQuery UI 拖动(Draggable) - 默认功能</title>
  <link rel=\"stylesheet\" href=\"//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css\">
  <script src=\"//code.jquery.com/jquery-1.9.1.js\"></script>
  <script src=\"//code.jquery.com/ui/1.10.4/jquery-ui.js\"></script>
  <link rel=\"stylesheet\" href=\"http://jqueryui.com/resources/demos/style.css\">
  <style>
  #draggable { width: 150px; height: 150px; padding: 0.5em; }
  </style>
  <script>
  $(function() {
    $( \"#draggable\" ).draggable();
  });
  </script>
</head>
<body>
 
<div>
  <p>请拖动我!</p>
</div>
 
 
</body>
</html>

自动滚动

当 draggable 移动到视区外时自动滚动文档。设置 scroll 选项为 true 来启用自动滚动,当滚动触发时进行微调,滚动速度是通过 scrollSensitivityscrollSpeed 选项设置的。

<!doctype html>
<html lang=\"en\">
<head>
  <meta charset=\"utf-8\">
  <title>jQuery UI 拖动(Draggable) - 自动滚动</title>
  <link rel=\"stylesheet\" href=\"//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css\">
  <script src=\"//code.jquery.com/jquery-1.9.1.js\"></script>
  <script src=\"//code.jquery.com/ui/1.10.4/jquery-ui.js\"></script>
  <link rel=\"stylesheet\" href=\"http://jqueryui.com/resources/demos/style.css\">
  <style>
  #draggable, #draggable2, #draggable3 { width: 100px; height: 100px; padding: 0.5em; float: left; margin: 0 10px 10px 0; }
  </style>
  <script>
  $(function() {
    $( \"#draggable\" ).draggable({ scroll: true });
    $( \"#draggable2\" ).draggable({ scroll: true, scrollSensitivity: 100 });
    $( \"#draggable3\" ).draggable({ scroll: true, scrollSpeed: 100 });
  });
  </script>
</head>
<body>
 
<div>
  <p>Scroll 设置为 true,默认设置</p>
</div>
 
<div>
  <p>scrollSensitivity 设置为 100</p>
</div>
 
<div>
  <p>scrollSpeed 设置为 100</p>
</div>
 
<div style=\"height: 5000px; width: 1px;\"></div>
 
 
</body>
</html>

约束运动

通过定义 draggable 区域的边界来约束每个 draggable 的运动。设置 axis 选项来限制 draggable 的路径为 x 轴或者 y 轴,或者使用 containment 选项来指定一个父级的 DOM 元素或者一个 jQuery 选择器,比如 \’document.\’。

<!doctype html>
<html lang=\"en\">
<head>
  <meta charset=\"utf-8\">
  <title>jQuery UI 拖动(Draggable) - 约束运动</title>
  <link rel=\"stylesheet\" href=\"//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css\">
  <script src=\"//code.jquery.com/jquery-1.9.1.js\"></script>
  <script src=\"//code.jquery.com/ui/1.10.4/jquery-ui.js\"></script>
  <link rel=\"stylesheet\" href=\"http://jqueryui.com/resources/demos/style.css\">
  <style>
  .draggable { width: 90px; height: 90px; padding: 0.5em; float: left; margin: 0 10px 10px 0; }
  #draggable, #draggable2 { margin-bottom:20px; }
  #draggable { cursor: n-resize; }
  #draggable2 { cursor: e-resize; }
  #containment-wrapper { width: 95%; height:150px; border:2px solid #ccc; padding: 10px; }
  h3 { clear: left; }
  </style>
  <script>
  $(function() {
    $( \"#draggable\" ).draggable({ axis: \"y\" });
    $( \"#draggable2\" ).draggable({ axis: \"x\" });
 
    $( \"#draggable3\" ).draggable({ containment: \"#containment-wrapper\", scroll: false });
    $( \"#draggable5\" ).draggable({ containment: \"parent\" });
  });
  </script>
</head>
<body>
 
<h3>沿着轴约束运动:</h3>
 
<div>
  <p>只能垂直拖拽</p>
</div>
 
<div>
  <p>只能水平拖拽</p>
</div>
 
<h3>或者在另一个 DOM 元素中约束运动:</h3>
<div>
  <div>
    <p>我被约束在盒子里</p>
  </div>
 
  <div>
    <p>我被约束在父元素内</p>
  </div>
</div>
 
 
</body>
</html>

光标样式

当拖拽对象时定位光标。默认情况下,光标是出现在被拖拽对象的中间。使用 cursorAt 选项来指定相对于 draggable 的另一个位置(指定一个相对于 top、right、bottom、left 的像素值)。通过提供一个带有有效的 CSS 光标值的 cursor 选项,来自定义光标的外观。有效的 CSS 光标值包括:default、move、pointer、crosshair,等等。

<!doctype html>
<html lang=\"en\">
<head>
  <meta charset=\"utf-8\">
  <title>jQuery UI 拖动(Draggable) - 光标样式</title>
  <link rel=\"stylesheet\" href=\"//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css\">
  <script src=\"//code.jquery.com/jquery-1.9.1.js\"></script>
  <script src=\"//code.jquery.com/ui/1.10.4/jquery-ui.js\"></script>
  <link rel=\"stylesheet\" href=\"http://jqueryui.com/resources/demos/style.css\">
  <style>
  #draggable, #draggable2, #draggable3 { width: 100px; height: 100px; padding: 0.5em; float: left; margin: 0 10px 10px 0; }
  </style>
  <script>
  $(function() {
    $( \"#draggable\" ).draggable({ cursor: \"move\", cursorAt: { top: 56, left: 56 } });
    $( \"#draggable2\" ).draggable({ cursor: \"crosshair\", cursorAt: { top: -5, left: -5 } });
    $( \"#draggable3\" ).draggable({ cursorAt: { bottom: 0 } });
  });
  </script>
</head>
<body>
 
<div>
  <p>我总是在中间(相对于鼠标)</p>
</div>
 
<div>
  <p>我的光标是在 left -5 和 top -5</p>
</div>
 
<div>
  <p>我的光标位置只控制了 \'bottom\' 值</p>
</div>
 
 
</body>
</html>

延迟开始

通过 delay 选项设置延迟开始拖拽的毫秒数。通过 distance 选项设置光标被按下且拖拽指定像素后才允许拖拽。

<!doctype html>
<html lang=\"en\">
<head>
  <meta charset=\"utf-8\">
  <title>jQuery UI 拖动(Draggable) - 延迟开始</title>
  <link rel=\"stylesheet\" href=\"//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css\">
  <script src=\"//code.jquery.com/jquery-1.9.1.js\"></script>
  <script src=\"//code.jquery.com/ui/1.10.4/jquery-ui.js\"></script>
  <link rel=\"stylesheet\" href=\"http://jqueryui.com/resources/demos/style.css\">
  <style>
  #draggable, #draggable2 { width: 120px; height: 120px; padding: 0.5em; float: left; margin: 0 10px 10px 0; }
  </style>
  <script>
  $(function() {
    $( \"#draggable\" ).draggable({ distance: 20 });
    $( \"#draggable2\" ).draggable({ delay: 1000 });
    $( \".ui-draggable\" ).disableSelection();
  });
  </script>
</head>
<body>
 
<div>
  <p>只有把我拖拽了 20 像素后,拖拽才开始</p>
</div>
 
<div>
  <p>不管 distance 是多少,您都必须拖拽并等待 1000ms 后拖拽才开始</p>
</div>
 
 
</body>
</html>

事件

draggable 上的 startdragstop 事件。拖拽开始时触发 start 事件,拖拽期间触发 drag 事件,拖拽停止时触发 stop 事件。

<!doctype html>
<html lang=\"en\">
<head>
  <meta charset=\"utf-8\">
  <title>jQuery UI 拖动(Draggable) - 事件</title>
  <link rel=\"stylesheet\" href=\"//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css\">
  <script src=\"//code.jquery.com/jquery-1.9.1.js\"></script>
  <script src=\"//code.jquery.com/ui/1.10.4/jquery-ui.js\"></script>
  <link rel=\"stylesheet\" href=\"http://jqueryui.com/resources/demos/style.css\">
  <style>
  #draggable { width: 16em; padding: 0 1em; }
  #draggable ul li { margin: 1em 0; padding: 0.5em 0; } * html #draggable ul li { height: 1%; }
  #draggable ul li span.ui-icon { float: left; }
  #draggable ul li span.count { font-weight: bold; }
  </style>
  <script>
  $(function() {
    var $start_counter = $( \"#event-start\" ),
      $drag_counter = $( \"#event-drag\" ),
      $stop_counter = $( \"#event-stop\" ),
      counts = [ 0, 0, 0 ];
 
    $( \"#draggable\" ).draggable({
      start: function() {
        counts[ 0 ]++;
        updateCounterStatus( $start_counter, counts[ 0 ] );
      },
      drag: function() {
        counts[ 1 ]++;
        updateCounterStatus( $drag_counter, counts[ 1 ] );
      },
      stop: function() {
        counts[ 2 ]++;
        updateCounterStatus( $stop_counter, counts[ 2 ] );
      }
    });
 
    function updateCounterStatus( $event_counter, new_count ) {
      // 首先更新视觉状态...
      if ( !$event_counter.hasClass( \"ui-state-hover\" ) ) {
        $event_counter.addClass( \"ui-state-hover\" )
          .siblings().removeClass( \"ui-state-hover\" );
      }
      // ...然后更新数字
      $( \"span.count\", $event_counter ).text( new_count );
    }
  });
  </script>
</head>
<body>
 
<div>
 
  <p>请拖拽我,触发一连串的事件。</p>
 
  <ul>
    <li><span></span>\"start\" 被调用 <span>0</span>x</li>
    <li><span></span>\"drag\" 被调用 <span>0</span>x</li>
    <li><span></span>\"stop\" 被调用 <span>0</span>x</li>
  </ul>
</div>
 
 
</body>
</html>

Handles

只有当光标在 draggable 上指定部分时才允许拖拽。使用 handle 选项来指定用于拖拽对象的元素(或元素组)的 jQuery 选择器。

或者当光标在 draggable 内指定元素(或元素组)上时不允许拖拽。使用 cancel 选项来指定取消拖拽功能的 jQuery 选择器。

<!doctype html>
<html lang=\"en\">
<head>
  <meta charset=\"utf-8\">
  <title>jQuery UI 拖动(Draggable) - Handles</title>
  <link rel=\"stylesheet\" href=\"//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css\">
  <script src=\"//code.jquery.com/jquery-1.9.1.js\"></script>
  <script src=\"//code.jquery.com/ui/1.10.4/jquery-ui.js\"></script>
  <link rel=\"stylesheet\" href=\"http://jqueryui.com/resources/demos/style.css\">
  <style>
  #draggable, #draggable2 { width: 100px; height: 100px; padding: 0.5em; float: left; margin: 0 10px 10px 0; }
  #draggable p { cursor: move; }
  </style>
  <script>
  $(function() {
    $( \"#draggable\" ).draggable({ handle: \"p\" });
    $( \"#draggable2\" ).draggable({ cancel: \"p.ui-widget-header\" });
    $( \"div, p\" ).disableSelection();
  });
  </script>
</head>
<body>
 
<div>
  <p>您只可以在这个范围内拖拽我</p>
</div>
 
<div>
  <p>您可以把我向四周拖拽&hellip;</p>
  <p>&hellip;但是您不可以在这个范围内拖拽我</p>
</div>
 
 
</body>
</html>

还原位置

当带有布尔值 revert 选项的 draggable 停止拖拽时,返回 draggable(或它的助手)到原始位置。

<!doctype html>
<html lang=\"en\">
<head>
  <meta charset=\"utf-8\">
  <title>jQuery UI 拖动(Draggable) - 还原位置</title>
  <link rel=\"stylesheet\" href=\"//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css\">
  <script src=\"//code.jquery.com/jquery-1.9.1.js\"></script>
  <script src=\"//code.jquery.com/ui/1.10.4/jquery-ui.js\"></script>
  <link rel=\"stylesheet\" href=\"http://jqueryui.com/resources/demos/style.css\">
  <style>
  #draggable, #draggable2 { width: 100px; height: 100px; padding: 0.5em; float: left; margin: 0 10px 10px 0; }
  </style>
  <script>
  $(function() {
    $( \"#draggable\" ).draggable({ revert: true });
    $( \"#draggable2\" ).draggable({ revert: true, helper: \"clone\" });
  });
  </script>
</head>
<body>
 
<div>
  <p>还原</p>
</div>
 
<div>
  <p>还原助手</p>
</div>
 
 
</body>
</html>

对齐到元素或网格

对齐 draggable 到 DOM 元素的内部或外部边界。使用 snapsnapMode(inner, outer, both)和 snapTolerance(当调用对齐时,draggable 与元素之间的距离,以像素为单位)选项。

或者对齐 draggable 到网格。通过 grid 选项设置网格单元的尺寸(以像素为单位的高度或宽度)。

<!doctype html>
<html lang=\"en\">
<head>
  <meta charset=\"utf-8\">
  <title>jQuery UI 拖动(Draggable) - 对齐到元素或网格</title>
  <link rel=\"stylesheet\" href=\"//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css\">
  <script src=\"//code.jquery.com/jquery-1.9.1.js\"></script>
  <script src=\"//code.jquery.com/ui/1.10.4/jquery-ui.js\"></script>
  <link rel=\"stylesheet\" href=\"http://jqueryui.com/resources/demos/style.css\">
  <style>
  .draggable { width: 90px; height: 80px; padding: 5px; float: left; margin: 0 10px 10px 0; font-size: .9em; }
  .ui-widget-header p, .ui-widget-content p { margin: 0; }
  #snaptarget { height: 140px; }
  </style>
  <script>
  $(function() {
    $( \"#draggable\" ).draggable({ snap: true });
    $( \"#draggable2\" ).draggable({ snap: \".ui-widget-header\" });
    $( \"#draggable3\" ).draggable({ snap: \".ui-widget-header\", snapMode: \"outer\" });
    $( \"#draggable4\" ).draggable({ grid: [ 20, 20 ] });
    $( \"#draggable5\" ).draggable({ grid: [ 80, 80 ] });
  });
  </script>
</head>
<body>
 
<div>
  <p>我是对齐目标</p>
</div>
 
<br style=\"clear:both\">
 
<div>
  <p>默认(snap: true),对齐到所有其他的 draggable 元素</p>
</div>
 
<div>
  <p>我只对齐到大盒子</p>
</div>
 
<div>
  <p>我只对齐到大盒子的外边缘</p>
</div>
 
<div>
  <p>我对齐到一个 20 x 20 网格</p>
</div>
 
<div>
  <p>我对齐到一个 80 x 80 网格</p>
</div>
 
 
</body>
</html>

视觉反馈

给用户提供反馈,就像以助手方式拖拽对象一样。helper 选项接受值 \’original\’(用光标移动 draggable 对象),\’clone\’(用光标移动 draggable 的副本),或者一个返回 DOM 元素的函数(该元素在拖拽期间显示在光标附近)。通过 opacity 选项控制助手的透明度。

为了区别哪一个 draggable 正在被拖拽,让在运动中的 draggable 保持最前。如果正在拖拽,使用 zIndex 选项来设置助手的高度 z-index,或者使用 stack 选项来确保当停止拖拽时,最后一个被拖拽的项目总是出现在同组其他项目的上面。

<!doctype html>
<html lang=\"en\">
<head>
  <meta charset=\"utf-8\">
  <title>jQuery UI 拖动(Draggable) - 视觉反馈</title>
  <link rel=\"stylesheet\" href=\"//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css\">
  <script src=\"//code.jquery.com/jquery-1.9.1.js\"></script>
  <script src=\"//code.jquery.com/ui/1.10.4/jquery-ui.js\"></script>
  <link rel=\"stylesheet\" href=\"http://jqueryui.com/resources/demos/style.css\">
  <style>
  #draggable, #draggable2, #draggable3, #set div { width: 90px; height: 90px; padding: 0.5em; float: left; margin: 0 10px 10px 0; }
  #draggable, #draggable2, #draggable3 { margin-bottom:20px; }
  #set { clear:both; float:left; width: 368px; height: 120px; }
  p { clear:both; margin:0; padding:1em 0; }
  </style>
  <script>
  $(function() {
    $( \"#draggable\" ).draggable({ helper: \"original\" });
    $( \"#draggable2\" ).draggable({ opacity: 0.7, helper: \"clone\" });
    $( \"#draggable3\" ).draggable({
      cursor: \"move\",
      cursorAt: { top: -12, left: -20 },
      helper: function( event ) {
        return $( \"<div class=\'ui-widget-header\'>I\'m a custom helper</div>\" );
      }
    });
    $( \"#set div\" ).draggable({ stack: \"#set div\" });
  });
  </script>
</head>
<body>
 
<h3>助手:</h3>
 
<div>
  <p>原始的</p>
</div>
 
<div>
  <p>半透明的克隆</p>
</div>
 
<div>
  <p>自定义助手(与 cursorAt 结合)</p>
</div>
 
<h3>堆叠:</h3>
<div>
  <div>
    <p>我们是 draggables..</p>
  </div>
 
  <div>
    <p>..它的 z-index 是自动控制的..</p>
  </div>
 
  <div>
    <p>..带有 stack 选项。</p>
  </div>
</div>
 
 
</body>
</html>

jQuery UI Draggable + Sortable

Draggable 与 Sortable 的无缝交互。

<!doctype html>
<html lang=\"en\">
<head>
  <meta charset=\"utf-8\">
  <title>jQuery UI 拖动(Draggable) + 排序(Sortable)</title>
  <link rel=\"stylesheet\" href=\"//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css\">
  <script src=\"//code.jquery.com/jquery-1.9.1.js\"></script>
  <script src=\"//code.jquery.com/ui/1.10.4/jquery-ui.js\"></script>
  <link rel=\"stylesheet\" href=\"http://jqueryui.com/resources/demos/style.css\">
  <style>
  ul { list-style-type: none; margin: 0; padding: 0; margin-bottom: 10px; }
  li { margin: 5px; padding: 5px; width: 150px; }
  </style>
  <script>
  $(function() {
    $( \"#sortable\" ).sortable({
      revert: true
    });
    $( \"#draggable\" ).draggable({
      connectToSortable: \"#sortable\",
      helper: \"clone\",
      revert: \"invalid\"
    });
    $( \"ul, li\" ).disableSelection();
  });
  </script>
</head>
<body>
 
<ul>
  <li>请拖拽我</li>
</ul>
 
<ul>
  <li>Item 1</li>
  <li>Item 2</li>
  <li>Item 3</li>
  <li>Item 4</li>
  <li>Item 5</li>
</ul>
 
 
</body>
</html>