jQuery UI 實例– 拖動（Draggable）

上一頁： jQuery UI API –工具提示框部件（Tooltip Widget）

允許使用鼠標移動元素。

如需了解更多有關draggable交互的細節，請查看API文檔可拖拽小部件（Draggable Widget）。

默認功能

在任意的DOM 元素上啟用draggable 功能。通過鼠標點擊並在視區中拖動來移動draggable 對象。

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI 拖動（Draggable） - 默認功能</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 id="draggable" class="ui-widget-content">
  <p>請拖動我！ </p>
</div>
 
 
</body>
</html>

自動滾動

當draggable 移動到視區外時自動滾動文檔。設置scroll選項為true來啟用自動滾動，當滾動觸發時進行微調，滾動速度是通過scrollSensitivity和scrollSpeed選項設置的。

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI 拖動（Draggable） - 自動滾動</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 id="draggable" class="ui-widget-content">
  <p>Scroll 設置為true，默認設置</p>
</div>
 
<div id="draggable2" class="ui-widget-content">
  <p>scrollSensitivity 設置為100</p>
</div>
 
<div id="draggable3" class="ui-widget-content">
  <p>scrollSpeed 設置為100</p>
</div>
 
<div style="height: 5000px; width: 1px;"></div>
 
 
</body>
</html>

約束運動

通過定義draggable 區域的邊界來約束每個draggable 的運動。設置axis選項來限制draggable的路徑為x軸或者y軸，或者使用containment選項來指定一個父級的DOM元素或者一個jQuery選擇器，比如'document.'。

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI 拖動（Draggable） - 約束運動</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>沿著軸約束運動：</h3>
 
<div id="draggable" class="draggable ui-widget-content">
  <p>只能垂直拖拽</p>
</div>
 
<div id="draggable2" class="draggable ui-widget-content">
  <p>只能水平拖拽</p>
</div>
 
<h3>或者在另一個DOM 元素中約束運動：</h3>
<div id="containment-wrapper">
  <div id="draggable3" class="draggable ui-widget-content">
    <p>我被約束在盒子裡</p>
  </div>
 
  <div class="draggable ui-widget-content">
    <p id="draggable5" class="ui-widget-header">我被約束在父元素內</p>
  </div>
</div>
 
 
</body>
</html>

光標樣式

當拖拽對象時定位光標。默認情況下，光標是出現在被拖拽對象的中間。使用cursorAt選項來指定相對於draggable的另一個位置（指定一個相對於top、right、bottom、left的像素值）。通過提供一個帶有有效的CSS光標值的cursor選項，來自定義光標的外觀。有效的CSS 光標值包括：default、move、pointer、crosshair，等等。

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI 拖動（Draggable） - 光標樣式</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 id="draggable" class="ui-widget-content">
  <p>我總是在中間（相對於鼠標）</p>
</div>
 
<div id="draggable2" class="ui-widget-content">
  <p>我的光標是在left -5 和top -5</p>
</div>
 
<div id="draggable3" class="ui-widget-content">
  <p>我的光標位置只控制了'bottom' 值</p>
</div>
 
 
</body>
</html>

延遲開始

通過delay選項設置延遲開始拖拽的毫秒數。通過distance選項設置光標被按下且拖拽指定像素後才允許拖拽。

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI 拖動（Draggable） - 延遲開始</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 id="draggable" class="ui-widget-content">
  <p>只有把我拖拽了20 像素後，拖拽才開始</p>
</div>
 
<div id="draggable2" class="ui-widget-content">
  <p>不管distance 是多少，您都必須拖拽並等待1000ms 後拖拽才開始</p>
</div>
 
 
</body>
</html>

事件

draggable上的start 、 drag和stop事件。拖拽開始時觸發start事件，拖拽期間觸發drag事件，拖拽停止時觸發stop事件。

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI 拖動（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( $event_counter, new_count ) {
      // 首先更新視覺狀態...
      if ( !$event_counter.hasClass( "ui-state-hover" ) ) {
        $event_counter.addClass( "ui-state-hover" )
          .siblings().removeClass( "ui-state-hover" );
      }
      // ...然後更新數字$( "span.count", $event_counter ).text( new_count );
    }
  });
  </script>
</head>
<body>
 
<div id="draggable" class="ui-widget ui-widget-content">
 
  <p>請拖拽我，觸發一連串的事件。 </p>
 
  <ul class="ui-helper-reset">
    <li id="event-start" class="ui-state-default ui-corner-all"><span class="ui-icon ui-icon-play"></span>"start" 被調用<span class="count">0</span>x</li>
    <li id="event-drag" class="ui-state-default ui-corner-all"><span class="ui-icon ui-icon-arrow-4"></span>"drag" 被調用<span class="count">0</span>x</li>
    <li id="event-stop" class="ui-state-default ui-corner-all"><span class="ui-icon ui-icon-stop"></span>"stop" 被調用<span class="count">0</span>x</li>
  </ul>
</div>
 
 
</body>
</html>

Handles

只有當光標在draggable 上指定部分時才允許拖拽。使用handle選項來指定用於拖拽對象的元素（或元素組）的jQuery選擇器。

Or prevent dragging when the cursor is over a specific element (or group of elements) within the draggable. Use the cancel option to specify a jQuery selector over which to "cancel" draggable functionality.

或者當光標在draggable 內指定元素（或元素組）上時不允許拖拽。使用handle選項來指定取消拖拽功能的jQuery選擇器。

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI 拖動（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 id="draggable" class="ui-widget-content">
  <p class="ui-widget-header">您只可以在這個範圍內拖拽我</p>
</div>
 
<div id="draggable2" class="ui-widget-content">
  <p>您可以把我向四周拖拽&hellip;</p>
  <p class="ui-widget-header">&hellip;但是您不可以在這個範圍內拖拽我</p>
</div>
 
 
</body>
</html>

還原位置

當帶有布爾值revert選項的draggable停止拖拽時，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 拖動（Draggable） - 還原位置</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 id="draggable" class="ui-widget-content">
  <p>還原</p>
</div>
 
<div id="draggable2" class="ui-widget-content">
  <p>還原助手</p>
</div>
 
 
</body>
</html>

對齊到元素或網格

對齊draggable 到DOM 元素的內部或外部邊界。使用snap 、 snapMode （inner, outer, both）和snapTolerance （當調用對齊時，draggable與元素之間的距離，以像素為單位）選項。

或者對齊draggable 到網格。通過grid選項設置網格單元的尺寸（以像素為單位的高度或寬度）。

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI 拖動（Draggable） - 對齊到元素或網格</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 id="snaptarget" class="ui-widget-header">
  <p>我是對齊目標</p>
</div>
 
<br style="clear:both">
 
<div id="draggable" class="draggable ui-widget-content">
  <p>默認（snap: true），對齊到所有其他的draggable 元素</p>
</div>
 
<div id="draggable2" class="draggable ui-widget-content">
  <p>我只對齊到大盒子</p>
</div>
 
<div id="draggable3" class="draggable ui-widget-content">
  <p>我只對齊到大盒子的外邊緣</p>
</div>
 
<div id="draggable4" class="draggable ui-widget-content">
  <p>我對齊到一個20 x 20 網格</p>
</div>
 
<div id="draggable5" class="draggable ui-widget-content">
  <p>我對齊到一個80 x 80 網格</p>
</div>
 
 
</body>
</html>

視覺反饋

給用戶提供反饋，就像以助手方式拖拽對像一樣。 helper選項接受值'original'（用光標移動draggable對象），'clone'（用光標移動draggable的副本），或者一個返回DOM元素的函數（該元素在拖拽期間顯示在光標附近）。通過opacity選項控制助手的透明度。

為了區別哪一個draggable 正在被拖拽，讓在運動中的draggable 保持最前。如果正在拖拽，使用zIndex選項來設置助手的高度z-index，或者使用stack選項來確保當停止拖拽時，最後一個被拖拽的項目總是出現在同組其他項目的上面。

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI 拖動（Draggable） - 視覺反饋</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 class="docs">助手：</h3>
 
<div id="draggable" class="ui-widget-content">
  <p>原始的</p>
</div>
 
<div id="draggable2" class="ui-widget-content">
  <p>半透明的克隆</p>
</div>
 
<div id="draggable3" class="ui-widget-content">
  <p>自定義助手（與cursorAt 結合）</p>
</div>
 
<h3 class="docs">堆疊：</h3>
<div id="set">
  <div class="ui-widget-content">
    <p>我們是draggables..</p>
  </div>
 
  <div class="ui-widget-content">
    <p>..它的z-index 是自動控制的..</p>
  </div>
 
  <div class="ui-widget-content">
    <p>..帶有stack 選項。 </p>
  </div>
</div>
 
 
</body>
</html>

jQuery UI Draggable + Sortable

Draggable 與Sortable 的無縫交互。

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI 拖動（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 id="draggable" class="ui-state-highlight">請拖拽我</li>
</ul>
 
<ul id="sortable">
  <li class="ui-state-default">Item 1</li>
  <li class="ui-state-default">Item 2</li>
  <li class="ui-state-default">Item 3</li>
  <li class="ui-state-default">Item 4</li>
  <li class="ui-state-default">Item 5</li>
</ul>
 
 
</body>
</html>

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