jQuery UI 实例 - 放置（Droppable）

为可拖拽小部件创建目标。

如需了解更多有关 droppable 交互的细节，请查看 API 文档可放置小部件（Droppable Widget）。

默认功能

在任意的 DOM 元素上启用 droppable 功能，并为可拖拽小部件创建目标。


<!doctype html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>jQuery UI 放置（Droppable） - 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: 100px; height: 100px; padding: 0.5em; float: left; margin: 10px 10px 10px 0; }

  #droppable { width: 150px; height: 150px; padding: 0.5em; float: left; margin: 10px; }

  </style>

  <script>

  $(function() {

    $( "#draggable" ).draggable();

    $( "#droppable" ).droppable({

      drop: function( event, ui ) {

        $( this )

          .addClass( "ui-state-highlight" )

          .find( "p" )

            .html( "Dropped!" );

      }

    });

  });

  </script>

</head>

<body>

 

<div id="draggable" class="ui-widget-content">

  <p>请把我拖拽到目标处！</p>

</div>

 

<div id="droppable" class="ui-widget-header">

  <p>请放置在这里！</p>

</div>

 

 

</body>

</html>

接受

使用 accept 选项指定目标 droppable 接受哪一个元素（或元素组）。


<!doctype html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>jQuery UI 放置（Droppable） - 接受</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>

  #droppable { width: 150px; height: 150px; padding: 0.5em; float: left; margin: 10px; }

  #draggable, #draggable-nonvalid { width: 100px; height: 100px; padding: 0.5em; float: left; margin: 10px 10px 10px 0; }

  </style>

  <script>

  $(function() {

    $( "#draggable, #draggable-nonvalid" ).draggable();

    $( "#droppable" ).droppable({

      accept: "#draggable",

      activeClass: "ui-state-hover",

      hoverClass: "ui-state-active",

      drop: function( event, ui ) {

        $( this )

          .addClass( "ui-state-highlight" )

          .find( "p" )

            .html( "Dropped!" );

      }

    });

  });

  </script>

</head>

<body>

 

<div id="draggable-nonvalid" class="ui-widget-content">

  <p>我是不能被放置的 draggable</p>

</div>

 

<div id="draggable" class="ui-widget-content">

  <p>请拖拽我到目标</p>

</div>

 

<div id="droppable" class="ui-widget-header">

  <p>accept: '#draggable'</p>

</div>

 

 

</body>

</html>

防止传播

当使用嵌套的 droppable 时 — 例如，您可以有一个树形的可编辑的目录结构，带有文件夹和文档节点 — greedy 选项设置为 true 来防止当 draggable 被放置在子节点（droppable）上时的事件传播。


<!doctype html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>jQuery UI 放置（Droppable） - 防止传播</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: 100px; height: 40px; padding: 0.5em; float: left; margin: 10px 10px 10px 0; }

  #droppable, #droppable2 { width: 230px; height: 120px; padding: 0.5em; float: left; margin: 10px; }

  #droppable-inner, #droppable2-inner { width: 170px; height: 60px; padding: 0.5em; float: left; margin: 10px; }

  </style>

  <script>

  $(function() {

    $( "#draggable" ).draggable();

 

    $( "#droppable, #droppable-inner" ).droppable({

      activeClass: "ui-state-hover",

      hoverClass: "ui-state-active",

      drop: function( event, ui ) {

        $( this )

          .addClass( "ui-state-highlight" )

          .find( "> p" )

            .html( "Dropped!" );

        return false;

      }

    });

 

    $( "#droppable2, #droppable2-inner" ).droppable({

      greedy: true,

      activeClass: "ui-state-hover",

      hoverClass: "ui-state-active",

      drop: function( event, ui ) {

        $( this )

          .addClass( "ui-state-highlight" )

          .find( "> p" )

            .html( "Dropped!" );

      }

    });

  });

  </script>

</head>

<body>

 

<div id="draggable" class="ui-widget-content">

  <p>请拖拽我到目标</p>

</div>

 

<div id="droppable" class="ui-widget-header">

  <p>外部 droppable</p>

  <div id="droppable-inner" class="ui-widget-header">

    <p>内部 droppable（不带有 greedy）</p>

  </div>

</div>

 

<div id="droppable2" class="ui-widget-header">

  <p>外部 droppable</p>

  <div id="droppable2-inner" class="ui-widget-header">

    <p>内部 droppable（带有 greedy）</p>

  </div>

</div>

 

 

</body>

</html>

还原 draggable 的位置

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 放置（Droppable） - 还原 draggable 的位置</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: 10px 10px 10px 0; }

  #droppable { width: 150px; height: 150px; padding: 0.5em; float: left; margin: 10px; }

  </style>

  <script>

  $(function() {

    $( "#draggable" ).draggable({ revert: "valid" });

    $( "#draggable2" ).draggable({ revert: "invalid" });

 

    $( "#droppable" ).droppable({

      activeClass: "ui-state-default",

      hoverClass: "ui-state-hover",

      drop: function( event, ui ) {

        $( this )

          .addClass( "ui-state-highlight" )

          .find( "p" )

            .html( "已放置！" );

      }

    });

  });

  </script>

</head>

<body>

 

<div id="draggable" class="ui-widget-content">

  <p>当被放置在目标上时还原</p>

</div>

 

<div id="draggable2" class="ui-widget-content">

  <p>当未被放置在目标上时还原</p>

</div>

 

<div id="droppable" class="ui-widget-header">

  <p>请放置在这里</p>

</div>

 

 

</body>

</html>

购物车演示

演示如何使用折叠面板来展示产品的目录结构，使用拖拽和放置来添加产品到购物车，购物车中的产品是可排序的。


<!doctype html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>jQuery UI 放置（Droppable） - 购物车演示</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>

  h1 { padding: .2em; margin: 0; }

  #products { float:left; width: 500px; margin-right: 2em; }

  #cart { width: 200px; float: left; margin-top: 1em; }

  /* 定义列表样式，以便最大化 droppable */

  #cart ol { margin: 0; padding: 1em 0 1em 3em; }

  </style>

  <script>

  $(function() {

    $( "#catalog" ).accordion();

    $( "#catalog li" ).draggable({

      appendTo: "body",

      helper: "clone"

    });

    $( "#cart ol" ).droppable({

      activeClass: "ui-state-default",

      hoverClass: "ui-state-hover",

      accept: ":not(.ui-sortable-helper)",

      drop: function( event, ui ) {

        $( this ).find( ".placeholder" ).remove();

        $( "<li></li>" ).text( ui.draggable.text() ).appendTo( this );

      }

    }).sortable({

      items: "li:not(.placeholder)",

      sort: function() {

        // 获取由 droppable 与 sortable 交互而加入的条目

        // 使用 connectWithSortable 可以解决这个问题，但不允许您自定义 active/hoverClass 选项

        $( this ).removeClass( "ui-state-default" );

      }

    });

  });

  </script>

</head>

<body>

 

<div id="products">

  <h1 class="ui-widget-header">产品</h1>

  <div id="catalog">

    <h2><a href="#">T-Shirts</a></h2>

    <div>

      <ul>

        <li>Lolcat Shirt</li>

        <li>Cheezeburger Shirt</li>

        <li>Buckit Shirt</li>

      </ul>

    </div>

    <h2><a href="#">Bags</a></h2>

    <div>

      <ul>

        <li>Zebra Striped</li>

        <li>Black Leather</li>

        <li>Alligator Leather</li>

      </ul>

    </div>

    <h2><a href="#">Gadgets</a></h2>

    <div>

      <ul>

        <li>iPhone</li>

        <li>iPod</li>

        <li>iPad</li>

      </ul>

    </div>

  </div>

</div>

 

<div id="cart">

  <h1 class="ui-widget-header">购物车</h1>

  <div class="ui-widget-content">

    <ol>

      <li class="placeholder">添加产品到这里</li>

    </ol>

  </div>

</div>

 

 

</body>

</html>

简单的照片管理器

您可以通过拖拽照片到回收站或者点击回收站图标来删除照片。

您可以通过拖拽照片到相册或者点击回收利用图标来还原照片。

您可以通过点击缩放图标来查看大图。jQuery UI 对话框（dialog）部件用于模态窗口。


<!doctype html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>jQuery UI 放置（Droppable） - 简单的照片管理器</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>

  #gallery { float: left; width: 65%; min-height: 12em; }

  .gallery.custom-state-active { background: #eee; }

  .gallery li { float: left; width: 96px; padding: 0.4em; margin: 0 0.4em 0.4em 0; text-align: center; }

  .gallery li h5 { margin: 0 0 0.4em; cursor: move; }

  .gallery li a { float: right; }

  .gallery li a.ui-icon-zoomin { float: left; }

  .gallery li img { width: 100%; cursor: move; }

 

  #trash { float: right; width: 32%; min-height: 18em; padding: 1%; }

  #trash h4 { line-height: 16px; margin: 0 0 0.4em; }

  #trash h4 .ui-icon { float: left; }

  #trash .gallery h5 { display: none; }

  </style>

  <script>

  $(function() {

    // 这是相册和回收站

    var $gallery = $( "#gallery" ),

      $trash = $( "#trash" );

 

    // 让相册的条目可拖拽

    $( "li", $gallery ).draggable({

      cancel: "a.ui-icon", // 点击一个图标不会启动拖拽

      revert: "invalid", // 当未被放置时，条目会还原回它的初始位置

      containment: "document",

      helper: "clone",

      cursor: "move"

    });

 

    // 让回收站可放置，接受相册的条目

    $trash.droppable({

      accept: "#gallery > li",

      activeClass: "ui-state-highlight",

      drop: function( event, ui ) {

        deleteImage( ui.draggable );

      }

    });

 

    // 让相册可放置，接受回收站的条目

    $gallery.droppable({

      accept: "#trash li",

      activeClass: "custom-state-active",

      drop: function( event, ui ) {

        recycleImage( ui.draggable );

      }

    });

 

    // 图像删除功能

    var recycle_icon = "<a href='link/to/recycle/script/when/we/have/js/off' title='还原图像' class='ui-icon ui-icon-refresh'>还原图像</a>";

    function deleteImage( $item ) {

      $item.fadeOut(function() {

        var $list = $( "ul", $trash ).length ?

          $( "ul", $trash ) :

          $( "<ul class='gallery ui-helper-reset'/>" ).appendTo( $trash );

 

        $item.find( "a.ui-icon-trash" ).remove();

        $item.append( recycle_icon ).appendTo( $list ).fadeIn(function() {

          $item

            .animate({ width: "48px" })

            .find( "img" )

              .animate({ height: "36px" });

        });

      });

    }

 

    // 图像还原功能

    var trash_icon = "<a href='link/to/trash/script/when/we/have/js/off' title='删除图像' class='ui-icon ui-icon-trash'>删除图像</a>";

    function recycleImage( $item ) {

      $item.fadeOut(function() {

        $item

          .find( "a.ui-icon-refresh" )

            .remove()

          .end()

          .css( "width", "96px")

          .append( trash_icon )

          .find( "img" )

            .css( "height", "72px" )

          .end()

          .appendTo( $gallery )

          .fadeIn();

      });

    }

 

    // 图像预览功能，演示 ui.dialog 作为模态窗口使用

    function viewLargerImage( $link ) {

      var src = $link.attr( "href" ),

        title = $link.siblings( "img" ).attr( "alt" ),

        $modal = $( "img[src$='" + src + "']" );

 

      if ( $modal.length ) {

        $modal.dialog( "open" );

      } else {

        var img = $( "<img alt='" + title + "' width='384' height='288' style='display: none; padding: 8px;' />" )

          .attr( "src", src ).appendTo( "body" );

        setTimeout(function() {

          img.dialog({

            title: title,

            width: 400,

            modal: true

          });

        }, 1 );

      }

    }

 

    // 通过事件代理解决图标行为

    $( "ul.gallery > li" ).click(function( event ) {

      var $item = $( this ),

        $target = $( event.target );

 

      if ( $target.is( "a.ui-icon-trash" ) ) {

        deleteImage( $item );

      } else if ( $target.is( "a.ui-icon-zoomin" ) ) {

        viewLargerImage( $target );

      } else if ( $target.is( "a.ui-icon-refresh" ) ) {

        recycleImage( $item );

      }

 

      return false;

    });

  });

  </script>

</head>

<body>

 

<div class="ui-widget ui-helper-clearfix">

 

<ul id="gallery" class="gallery ui-helper-reset ui-helper-clearfix">

  <li class="ui-widget-content ui-corner-tr">

    <h5 class="ui-widget-header">High Tatras</h5>

    <img src="/wp-content/uploads/2014/03/high_tatras_min.jpg" alt="High Tatras 的最高峰" width="96" height="72">

    <a href="/wp-content/uploads/2014/03/high_tatras.jpg" title="查看大图" class="ui-icon ui-icon-zoomin">查看大图</a>

    <a href="link/to/trash/script/when/we/have/js/off" title="删除图像" class="ui-icon ui-icon-trash">删除图像</a>

  </li>

  <li class="ui-widget-content ui-corner-tr">

    <h5 class="ui-widget-header">High Tatras 2</h5>

    <img src="/wp-content/uploads/2014/03/high_tatras2_min.jpg" alt="绿山湖畔的小屋" width="96" height="72">

    <a href="/wp-content/uploads/2014/03/high_tatras2.jpg" title="查看大图" class="ui-icon ui-icon-zoomin">查看大图</a>

    <a href="link/to/trash/script/when/we/have/js/off" title="删除图像" class="ui-icon ui-icon-trash">删除图像</a>

  </li>

  <li class="ui-widget-content ui-corner-tr">

    <h5 class="ui-widget-header">High Tatras 3</h5>

    <img src="/wp-content/uploads/2014/03/high_tatras3_min.jpg" alt="计划登高" width="96" height="72">

    <a href="/wp-content/uploads/2014/03/high_tatras3.jpg" title="查看大图" class="ui-icon ui-icon-zoomin">查看大图</a>

    <a href="link/to/trash/script/when/we/have/js/off" title="删除图像" class="ui-icon ui-icon-trash">删除图像</a>

  </li>

  <li class="ui-widget-content ui-corner-tr">

    <h5 class="ui-widget-header">High Tatras 4</h5>

    <img src="/wp-content/uploads/2014/03/high_tatras4_min.jpg" alt="在 Kozi kopka 的顶部" width="96" height="72">

    <a href="/wp-content/uploads/2014/03/high_tatras4.jpg" title="查看大图" class="ui-icon ui-icon-zoomin">查看大图</a>

    <a href="link/to/trash/script/when/we/have/js/off" title="删除图像" class="ui-icon ui-icon-trash">删除图像</a>

  </li>

</ul>

 

<div id="trash" class="ui-widget-content ui-state-default">

  <h4 class="ui-widget-header"><span class="ui-icon ui-icon-trash">回收站</span> 回收站</h4>

</div>

 

</div>

 

 

</body>

</html>

视觉反馈

当悬停在 droppable 上时，或者当 droppable 被激活（即一个可接受的 draggable 被放置在 droppable 上）时，改变 droppable 的外观。使用 hoverClass 或 activeClass 选项来分别指定 class。


<!doctype html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>jQuery UI 放置（Droppable） - 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 { width: 90px; height: 90px; padding: 0.5em; float: left; margin: 10px 10px 10px 0; }

  #droppable, #droppable2 { width: 120px; height: 120px; padding: 0.5em; float: left; margin: 10px; }

  h3 { clear: left; }

  </style>

  <script>

  $(function() {

    $( "#draggable" ).draggable();

    $( "#droppable" ).droppable({

      hoverClass: "ui-state-hover",

      drop: function( event, ui ) {

        $( this )

          .addClass( "ui-state-highlight" )

          .find( "p" )

            .html( "Dropped!" );

      }

    });

 

    $( "#draggable2" ).draggable();

    $( "#droppable2" ).droppable({

      accept: "#draggable2",

      activeClass: "ui-state-default",

      drop: function( event, ui ) {

        $( this )

          .addClass( "ui-state-highlight" )

          .find( "p" )

            .html( "Dropped!" );

      }

    });

  });

  </script>

</head>

<body>

 

<h3>当悬停在 droppable 上时的反馈：</h3>

 

<div id="draggable" class="ui-widget-content">

  <p>请拖拽我到目标</p>

</div>

 

<div id="droppable" class="ui-widget-header">

  <p>请放置在这里</p>

</div>

 

<h3>当激活 draggable 时的反馈：</h3>

 

<div id="draggable2" class="ui-widget-content">

  <p>请拖拽我到目标</p>

</div>

 

<div id="droppable2" class="ui-widget-header">

  <p>请放置在这里</p>

</div>

 

 

</body>

</html>

放置（Droppable） - jQuery UI教程