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("entry-list", tpl, {
41 moreView.on("beforerender", this.sortEntries, this);
43 url: "/blog/get-posts.php",
44 params: "allposts=true",
45 text: "Loading Blog Entries..."
49 * Create a new JsonView
50 * @param {String/HTMLElement/Element} container The container element where the view is to be rendered.
51 * @param {Template} tpl The rendering template
52 * @param {Object} config The config object
54 Roo.JsonView = function(container, tpl, config){
57 Roo.JsonView.superclass.constructor.call(this, container, tpl, config);
59 var um = this.el.getUpdateManager();
61 um.on("update", this.onLoad, this);
62 um.on("failure", this.onLoadException, this);
66 * Fires before rendering of the downloaded JSON data.
67 * @param {Roo.JsonView} this
68 * @param {Object} data The JSON data loaded
72 * Fires when data is loaded.
73 * @param {Roo.JsonView} this
74 * @param {Object} data The JSON data loaded
75 * @param {Object} response The raw Connect response object
78 * @event loadexception
79 * Fires when loading fails.
80 * @param {Roo.JsonView} this
81 * @param {Object} response The raw Connect response object
84 'beforerender' : true,
86 'loadexception' : true
89 Roo.extend(Roo.JsonView, Roo.View, {
91 * The root property in the loaded JSON object that contains the data
100 this.clearSelections();
103 var o = this.jsonData;
104 if(o && o.length > 0){
105 for(var i = 0, len = o.length; i < len; i++){
106 var data = this.prepareData(o[i], i, o);
107 html[html.length] = this.tpl.apply(data);
110 html.push(this.emptyText);
112 this.el.update(html.join(""));
113 this.nodes = this.el.dom.childNodes;
114 this.updateIndexes(0);
118 * 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.
119 * @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:
123 params: {param1: "foo", param2: "bar"}, // or a URL encoded string
124 callback: yourFunction,
125 scope: yourObject, //(optional scope)
133 * The only required property is <i>url</i>. The optional properties <i>nocache</i>, <i>text</i> and <i>scripts</i>
134 * 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.
135 * @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}
136 * @param {Function} callback (optional) Callback when transaction is complete - called with signature (oElement, bSuccess)
137 * @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.
140 var um = this.el.getUpdateManager();
141 um.update.apply(um, arguments);
144 render : function(el, response){
145 this.clearSelections();
149 o = Roo.util.JSON.decode(response.responseText);
152 o = /** eval:var:o */ eval("o." + this.jsonRoot);
157 * The current JSON data or null
165 * Get the number of records in the current JSON dataset
168 getCount : function(){
169 return this.jsonData ? this.jsonData.length : 0;
173 * Returns the JSON object for the specified node(s)
174 * @param {HTMLElement/Array} node The node or an array of nodes
175 * @return {Object/Array} If you pass in an array, you get an array back, otherwise
176 * you get the JSON object for the node
178 getNodeData : function(node){
179 if(node instanceof Array){
181 for(var i = 0, len = node.length; i < len; i++){
182 data.push(this.getNodeData(node[i]));
186 return this.jsonData[this.indexOf(node)] || null;
189 beforeRender : function(){
190 this.snapshot = this.jsonData;
192 this.sort.apply(this, this.sortInfo);
194 this.fireEvent("beforerender", this, this.jsonData);
197 onLoad : function(el, o){
198 this.fireEvent("load", this, this.jsonData, o);
201 onLoadException : function(el, o){
202 this.fireEvent("loadexception", this, o);
206 * Filter the data by a specific property.
207 * @param {String} property A property on your JSON objects
208 * @param {String/RegExp} value Either string that the property values
209 * should start with, or a RegExp to test against the property
211 filter : function(property, value){
214 var ss = this.snapshot;
215 if(typeof value == "string"){
216 var vlen = value.length;
221 value = value.toLowerCase();
222 for(var i = 0, len = ss.length; i < len; i++){
224 if(o[property].substr(0, vlen).toLowerCase() == value){
228 } else if(value.exec){ // regex?
229 for(var i = 0, len = ss.length; i < len; i++){
231 if(value.test(o[property])){
238 this.jsonData = data;
244 * Filter by a function. The passed function will be called with each
245 * object in the current dataset. If the function returns true the value is kept,
246 * otherwise it is filtered.
247 * @param {Function} fn
248 * @param {Object} scope (optional) The scope of the function (defaults to this JsonView)
250 filterBy : function(fn, scope){
253 var ss = this.snapshot;
254 for(var i = 0, len = ss.length; i < len; i++){
256 if(fn.call(scope || this, o)){
260 this.jsonData = data;
266 * Clears the current filter.
268 clearFilter : function(){
269 if(this.snapshot && this.jsonData != this.snapshot){
270 this.jsonData = this.snapshot;
277 * Sorts the data for this view and refreshes it.
278 * @param {String} property A property on your JSON objects to sort on
279 * @param {String} direction (optional) "desc" or "asc" (defaults to "asc")
280 * @param {Function} sortType (optional) A function to call to convert the data to a sortable value.
282 sort : function(property, dir, sortType){
283 this.sortInfo = Array.prototype.slice.call(arguments, 0);
286 var dsc = dir && dir.toLowerCase() == "desc";
287 var f = function(o1, o2){
288 var v1 = sortType ? sortType(o1[p]) : o1[p];
289 var v2 = sortType ? sortType(o2[p]) : o2[p];
292 return dsc ? +1 : -1;
294 return dsc ? -1 : +1;
299 this.jsonData.sort(f);
301 if(this.jsonData != this.snapshot){
302 this.snapshot.sort(f);