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      jQuery UI 实例 – 放置(Droppable)

      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="https://a.axihe.com/img/jqueryui/high_tatras_min.jpg" alt="High Tatras 的最高峰" width="96" height="72">
          <a href="https://a.axihe.com/img/jqueryui/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="https://a.axihe.com/img/jqueryui/high_tatras2_min.jpg" alt="绿山湖畔的小屋" width="96" height="72">
          <a href="https://a.axihe.com/img/jqueryui/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="https://a.axihe.com/img/jqueryui/high_tatras3_min.jpg" alt="计划登高" width="96" height="72">
          <a href="https://a.axihe.com/img/jqueryui/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="https://a.axihe.com/img/jqueryui/high_tatras4_min.jpg" alt="在 Kozi kopka 的顶部" width="96" height="72">
          <a href="https://a.axihe.com/img/jqueryui/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 hoverClassactiveClass 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>
      
      目录
      目录