jQuery UI 实例-放置（Droppable）

爱音乐的程序员小新人 06-02 256

前言：

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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=""> <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=""> <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>

查看演示

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=""> <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>

查看演示

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=""> <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>

查看演示

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=""> <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>

查看演示

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=""> <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>

查看演示

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=""> <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>

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