4 * Copyright(c) 2006-2007, Ext JS, LLC.
6 * Originally Released Under LGPL - original licence link has changed is not relivant.
9 * <script type="text/javascript">
15 * Shortcut class to create a JSON + {@link Roo.UpdateManager} template view. Usage:
17 var view = new Roo.JsonView("my-element",
18 '<div id="{id}">{foo} - {bar}</div>', // auto create template
19 { multiSelect: true, jsonRoot: "data" }
22 // listen for node click?
23 view.on("click", function(vw, index, node, e){
24 alert('Node "' + node.id + '" at index: ' + index + " was clicked.");
27 // direct load of JSON data
28 view.load("foobar.php");
30 // Example from my blog list
31 var tpl = new Roo.Template(
32 '<div class="entry">' +
33 '<a class="entry-title" href="{link}">{title}</a>' +
34 "<h4>{date} by {author} | {comments} Comments</h4>{description}" +
35 "</div><hr />"
38 var moreView = new Roo.JsonView({
39 container : "entry-list",
43 moreView.on("beforerender", this.sortEntries, this);
45 url: "/blog/get-posts.php",
46 params: "allposts=true",
47 text: "Loading Blog Entries..."
54 * Create a new JsonView
56 * @param {Object} config The config object
59 Roo.JsonView = function(container, tpl, config){
62 Roo.JsonView.superclass.constructor.call(this, container, tpl, config);
64 var um = this.el.getUpdateManager();
66 um.on("update", this.onLoad, this);
67 um.on("failure", this.onLoadException, this);
71 * Fires before rendering of the downloaded JSON data.
72 * @param {Roo.JsonView} this
73 * @param {Object} data The JSON data loaded
77 * Fires when data is loaded.
78 * @param {Roo.JsonView} this
79 * @param {Object} data The JSON data loaded
80 * @param {Object} response The raw Connect response object
83 * @event loadexception
84 * Fires when loading fails.
85 * @param {Roo.JsonView} this
86 * @param {Object} response The raw Connect response object
89 'beforerender' : true,
91 'loadexception' : true
94 Roo.extend(Roo.JsonView, Roo.View, {
96 * The root property in the loaded JSON object that contains the data
102 * Refreshes the view.
104 refresh : function(){
105 this.clearSelections();
108 var o = this.jsonData;
109 if(o && o.length > 0){
110 for(var i = 0, len = o.length; i < len; i++){
111 var data = this.prepareData(o[i], i, o);
112 html[html.length] = this.tpl.apply(data);
115 html.push(this.emptyText);
117 this.el.update(html.join(""));
118 this.nodes = this.el.dom.childNodes;
119 this.updateIndexes(0);
123 * Performs an async HTTP request, and loads the JSON from the response. If <i>params</i> are specified it uses POST, otherwise it uses GET.
124 * @param {Object/String/Function} url The URL for this request, or a function to call to get the URL, or a config object containing any of the following options:
128 params: {param1: "foo", param2: "bar"}, // or a URL encoded string
129 callback: yourFunction,
130 scope: yourObject, //(optional scope)
138 * The only required property is <i>url</i>. The optional properties <i>nocache</i>, <i>text</i> and <i>scripts</i>
139 * are respectively shorthand for <i>disableCaching</i>, <i>indicatorText</i>, and <i>loadScripts</i> and are used to set their associated property on this UpdateManager instance.
140 * @param {String/Object} params (optional) The parameters to pass, as either a URL encoded string "param1=1&param2=2" or an object {param1: 1, param2: 2}
141 * @param {Function} callback (optional) Callback when transaction is complete - called with signature (oElement, bSuccess)
142 * @param {Boolean} discardUrl (optional) By default when you execute an update the defaultUrl is changed to the last used URL. If true, it will not store the URL.
145 var um = this.el.getUpdateManager();
146 um.update.apply(um, arguments);
149 render : function(el, response){
150 this.clearSelections();
154 o = Roo.util.JSON.decode(response.responseText);
157 o = /** eval:var:o */ eval("o." + this.jsonRoot);
162 * The current JSON data or null
170 * Get the number of records in the current JSON dataset
173 getCount : function(){
174 return this.jsonData ? this.jsonData.length : 0;
178 * Returns the JSON object for the specified node(s)
179 * @param {HTMLElement/Array} node The node or an array of nodes
180 * @return {Object/Array} If you pass in an array, you get an array back, otherwise
181 * you get the JSON object for the node
183 getNodeData : function(node){
184 if(node instanceof Array){
186 for(var i = 0, len = node.length; i < len; i++){
187 data.push(this.getNodeData(node[i]));
191 return this.jsonData[this.indexOf(node)] || null;
194 beforeRender : function(){
195 this.snapshot = this.jsonData;
197 this.sort.apply(this, this.sortInfo);
199 this.fireEvent("beforerender", this, this.jsonData);
202 onLoad : function(el, o){
203 this.fireEvent("load", this, this.jsonData, o);
206 onLoadException : function(el, o){
207 this.fireEvent("loadexception", this, o);
211 * Filter the data by a specific property.
212 * @param {String} property A property on your JSON objects
213 * @param {String/RegExp} value Either string that the property values
214 * should start with, or a RegExp to test against the property
216 filter : function(property, value){
219 var ss = this.snapshot;
220 if(typeof value == "string"){
221 var vlen = value.length;
226 value = value.toLowerCase();
227 for(var i = 0, len = ss.length; i < len; i++){
229 if(o[property].substr(0, vlen).toLowerCase() == value){
233 } else if(value.exec){ // regex?
234 for(var i = 0, len = ss.length; i < len; i++){
236 if(value.test(o[property])){
243 this.jsonData = data;
249 * Filter by a function. The passed function will be called with each
250 * object in the current dataset. If the function returns true the value is kept,
251 * otherwise it is filtered.
252 * @param {Function} fn
253 * @param {Object} scope (optional) The scope of the function (defaults to this JsonView)
255 filterBy : function(fn, scope){
258 var ss = this.snapshot;
259 for(var i = 0, len = ss.length; i < len; i++){
261 if(fn.call(scope || this, o)){
265 this.jsonData = data;
271 * Clears the current filter.
273 clearFilter : function(){
274 if(this.snapshot && this.jsonData != this.snapshot){
275 this.jsonData = this.snapshot;
282 * Sorts the data for this view and refreshes it.
283 * @param {String} property A property on your JSON objects to sort on
284 * @param {String} direction (optional) "desc" or "asc" (defaults to "asc")
285 * @param {Function} sortType (optional) A function to call to convert the data to a sortable value.
287 sort : function(property, dir, sortType){
288 this.sortInfo = Array.prototype.slice.call(arguments, 0);
291 var dsc = dir && dir.toLowerCase() == "desc";
292 var f = function(o1, o2){
293 var v1 = sortType ? sortType(o1[p]) : o1[p];
294 var v2 = sortType ? sortType(o2[p]) : o2[p];
297 return dsc ? +1 : -1;
299 return dsc ? -1 : +1;
304 this.jsonData.sort(f);
306 if(this.jsonData != this.snapshot){
307 this.snapshot.sort(f);