122 lines
No EOL
4.9 KiB
HTML
122 lines
No EOL
4.9 KiB
HTML
<html><head><title>Registry.js</title><link rel="stylesheet" type="text/css" href="../resources/style.css" media="screen"/></head><body><h1>Registry.js</h1><pre class="highlighted"><code><i>/**
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* @class Ext.dd.Registry
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* Provides easy access to all drag drop components that are registered on a page. Items can be retrieved either
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* directly by DOM node id, or by passing <b>in</b> the drag drop event that occurred and looking up the event target.
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* @singleton
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*/</i>
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Ext.dd.Registry = <b>function</b>(){
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<b>var</b> elements = {};
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<b>var</b> handles = {};
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<b>var</b> autoIdSeed = 0;
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<b>var</b> getId = <b>function</b>(el, autogen){
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<b>if</b>(typeof el == "string"){
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<b>return</b> el;
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}
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<b>var</b> id = el.id;
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<b>if</b>(!id && autogen !== false){
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id = "extdd-" + (++autoIdSeed);
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el.id = id;
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}
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<b>return</b> id;
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};
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<b>return</b> {
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<i>/**
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* Resgister a drag drop element
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* @param {String/HTMLElement) element The id or DOM node to register
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* @param {Object} data (optional) An custom data object that will be passed between the elements that are involved
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* <b>in</b> drag drop operations. You can populate <b>this</b> object <b>with</b> any arbitrary properties that your own code
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* knows how to interpret, plus there are some specific properties known to the Registry that should be
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* populated <b>in</b> the data object (<b>if</b> applicable):
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* <pre>
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Value Description<br />
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--------- ------------------------------------------<br />
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handles Array of DOM nodes that trigger dragging<br />
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<b>for</b> the element being registered<br />
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isHandle True <b>if</b> the element passed <b>in</b> triggers<br />
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dragging itself, <b>else</b> false
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</pre>
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*/</i>
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register : <b>function</b>(el, data){
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data = data || {};
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<b>if</b>(typeof el == "string"){
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el = document.getElementById(el);
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}
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data.ddel = el;
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elements[getId(el)] = data;
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<b>if</b>(data.isHandle !== false){
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handles[data.ddel.id] = data;
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}
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<b>if</b>(data.handles){
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<b>var</b> hs = data.handles;
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<b>for</b>(var i = 0, len = hs.length; i < len; i++){
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handles[getId(hs[i])] = data;
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}
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}
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},
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<i>/**
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* Unregister a drag drop element
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* @param {String/HTMLElement) element The id or DOM node to unregister
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*/</i>
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unregister : <b>function</b>(el){
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<b>var</b> id = getId(el, false);
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<b>var</b> data = elements[id];
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<b>if</b>(data){
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<b>delete</b> elements[id];
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<b>if</b>(data.handles){
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<b>var</b> hs = data.handles;
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<b>for</b>(var i = 0, len = hs.length; i < len; i++){
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<b>delete</b> handles[getId(hs[i], false)];
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}
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}
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}
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},
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<i>/**
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* Returns the handle registered <b>for</b> a DOM Node by id
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* @param {String/HTMLElement} id The DOM node or id to look up
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* @<b>return</b> {Object} handle The custom handle data
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*/</i>
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getHandle : <b>function</b>(id){
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<b>if</b>(typeof id != "string"){ <i>// must be element?</i>
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id = id.id;
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}
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<b>return</b> handles[id];
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},
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<i>/**
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* Returns the handle that is registered <b>for</b> the DOM node that is the target of the event
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* @param {Event} e The event
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* @<b>return</b> {Object} handle The custom handle data
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*/</i>
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getHandleFromEvent : <b>function</b>(e){
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<b>var</b> t = Ext.lib.Event.getTarget(e);
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<b>return</b> t ? handles[t.id] : null;
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},
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<i>/**
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* Returns a custom data object that is registered <b>for</b> a DOM node by id
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* @param {String/HTMLElement} id The DOM node or id to look up
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* @<b>return</b> {Object} data The custom data
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*/</i>
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getTarget : <b>function</b>(id){
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<b>if</b>(typeof id != "string"){ <i>// must be element?</i>
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id = id.id;
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}
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<b>return</b> elements[id];
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},
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<i>/**
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* Returns a custom data object that is registered <b>for</b> the DOM node that is the target of the event
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* @param {Event} e The event
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* @<b>return</b> {Object} data The custom data
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*/</i>
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getTargetFromEvent : <b>function</b>(e){
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<b>var</b> t = Ext.lib.Event.getTarget(e);
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<b>return</b> t ? elements[t.id] || handles[t.id] : null;
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}
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};
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}();</code></pre><hr><div style="font-size:10px;text-align:center;color:gray;">Ext - Copyright © 2006-2007 Ext JS, LLC<br />All rights reserved.</div>
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</body></html> |