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jQuery UI 實例-放置（Droppable）

知識 01-29

為可拖拽小部件創建目標。

如需了解更多有關 droppable 交互的細節，請查看 API 文檔 可放置小部件（Droppable Widget）。

默認功能

在任意的 DOM 元素上啟用 droppable 功能，並為可拖拽小部件創建目標。

<!doctype html><html lang="en"><head>
<meta charset="utf-8">
<title>jQuery UI 放置（Droppable） - 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: 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>請把我拖拽到目標處！</p></div>
<div id="droppable" class="ui-widget-header">
<p>請放置在這裡！</p></div>
</body></html>

jQuery UI 實例-放置（Droppable）

接受

使用 accept 選項指定目標 droppable 接受哪一個元素（或元素組）。

<!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>請拖拽我到目標</p></div>
<div id="droppable" class="ui-widget-header">
<p>accept: "#draggable"</p></div>
</body></html>

查看演示

防止傳播

當使用嵌套的 droppable 時 — 例如，您可以有一個樹形的可編輯的目錄結構，帶有文件夾和文檔節點 — greedy 選項設置為 true 來防止當 draggable 被放置在子節點（droppable）上時的事件傳播。

<!doctype html><html lang="en"><head>
<meta charset="utf-8">
<title>jQuery UI 放置（Droppable） - 防止傳播</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>請拖拽我到目標</p></div>
<div id="droppable" class="ui-widget-header">
<p>外部 droppable</p>
<div id="droppable-inner" class="ui-widget-header">
<p>內部 droppable（不帶有 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>內部 droppable（帶有 greedy）</p>
</div></div>
</body></html>

查看演示

還原 draggable 的位置

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 放置（Droppable） - 還原 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>當被放置在目標上時還原</p></div>
<div id="draggable2" class="ui-widget-content">
<p>當未被放置在目標上時還原</p></div>
<div id="droppable" class="ui-widget-header">
<p>請放置在這裡</p></div>
</body></html>

查看演示

購物車演示

演示如何使用摺疊面板來展示產品的目錄結構，使用拖拽和放置來添加產品到購物車，購物車中的產品是可排序的。

<!doctype html><html lang="en"><head>
<meta charset="utf-8">
<title>jQuery UI 放置（Droppable） - 購物車演示</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; }
/* 定義列表樣式，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() {
// 獲取由 droppable 與 sortable 交互而加入的條目
// 使用 connectWithSortable 可以解決這個問題，但不允許您自定義 active/hoverClass 選項
$( this ).removeClass( "ui-state-default" );
}
});
});
</script></head><body>
<div id="products">
<h1 class="ui-widget-header">產品</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">購物車</h1>
<div class="ui-widget-content">
<ol>
<li class="placeholder">添加產品到這裡</li>
</ol>
</div></div>
</body></html>

查看演示

簡單的照片管理器

您可以通過拖拽照片到回收站或者點擊回收站圖標來刪除照片。

您可以通過拖拽照片到相冊或者點擊回收利用圖標來還原照片。

您可以通過點擊縮放圖標來查看大圖。jQuery UI 對話框（dialog）部件用於模態窗口。

<!doctype html><html lang="en"><head>
<meta charset="utf-8">
<title>jQuery UI 放置（Droppable） - 簡單的照片管理器</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() {
// 這是相冊和回收站
var $gallery = $( "#gallery" ),
$trash = $( "#trash" );
// 讓相冊的條目可拖拽
$( "li", $gallery ).draggable({
cancel: "a.ui-icon", // 點擊一個圖標不會啟動拖拽
revert: "invalid", // 當未被放置時，條目會還原回它的初始位置
containment: "document",
helper: "clone",
cursor: "move"
});
// 讓回收站可放置，接受相冊的條目
$trash.droppable({
accept: "#gallery > li",
activeClass: "ui-state-highlight",
drop: function( event, ui ) {
deleteImage( ui.draggable );
}
});
// 讓相冊可放置，接受回收站的條目
$gallery.droppable({
accept: "#trash li",
activeClass: "custom-state-active",
drop: function( event, ui ) {
recycleImage( ui.draggable );
}
});
// 圖像刪除功能
var recycle_icon = "<a href="link/to/recycle/script/when/we/have/js/off" title="還原圖像" class="ui-icon ui-icon-refresh">還原圖像</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" });
});
});
}
// 圖像還原功能
var trash_icon = "<a href="link/to/trash/script/when/we/have/js/off" title="刪除圖像" class="ui-icon ui-icon-trash">刪除圖像</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();
});
}
// 圖像預覽功能，演示 ui.dialog 作為模態窗口使用
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" stylex="display: none; padding: 8px;" />" )
.attr( "src", src ).appendTo( "body" );
setTimeout(function() {
img.dialog({
title: title,
width: 400,
modal: true
});
}, 1 );
}
}
// 通過事件代理解決圖標行為
$( "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="查看大圖" class="ui-icon ui-icon-zoomin">查看大圖</a>
<a href="link/to/trash/script/when/we/have/js/off" title="刪除圖像" class="ui-icon ui-icon-trash">刪除圖像</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="綠山湖畔的小屋" width="96" height="72">
<a href="/wp-content/uploads/2014/03/high_tatras2.jpg" title="查看大圖" class="ui-icon ui-icon-zoomin">查看大圖</a>
<a href="link/to/trash/script/when/we/have/js/off" title="刪除圖像" class="ui-icon ui-icon-trash">刪除圖像</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="計劃登高" width="96" height="72">
<a href="/wp-content/uploads/2014/03/high_tatras3.jpg" title="查看大圖" class="ui-icon ui-icon-zoomin">查看大圖</a>
<a href="link/to/trash/script/when/we/have/js/off" title="刪除圖像" class="ui-icon ui-icon-trash">刪除圖像</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 的頂部" width="96" height="72">
<a href="/wp-content/uploads/2014/03/high_tatras4.jpg" title="查看大圖" class="ui-icon ui-icon-zoomin">查看大圖</a>
<a href="link/to/trash/script/when/we/have/js/off" title="刪除圖像" class="ui-icon ui-icon-trash">刪除圖像</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

視覺反饋

當懸停在 droppable 上時，或者當 droppable 被激活（即一個可接受的 draggable 被放置在 droppable 上）時，改變 droppable 的外觀。使用 hoverClass 或 activeClass 選項來分別指定 class。

<!doctype html><html lang="en"><head>
<meta charset="utf-8">
<title>jQuery UI 放置（Droppable） - 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 { 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>當懸停在 droppable 上時的反饋：</h3>
<div id="draggable" class="ui-widget-content">
<p>請拖拽我到目標</p></div>
<div id="droppable" class="ui-widget-header">
<p>請放置在這裡</p></div>
<h3>當激活 draggable 時的反饋：</h3>
<div id="draggable2" class="ui-widget-content">
<p>請拖拽我到目標</p></div>
<div id="droppable2" class="ui-widget-header">
<p>請放置在這裡</p></div>
</body></html>

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