X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/ee06f37b0f6f6d94cd05a6ffae556660f7c4a2bc..76cb34406ceaf9681a76e13b531d7eafa483ad88:/examples/ux/PagingMemoryProxy.js

diff --git a/examples/ux/PagingMemoryProxy.js b/examples/ux/PagingMemoryProxy.js
new file mode 100644
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+++ b/examples/ux/PagingMemoryProxy.js
@@ -0,0 +1,96 @@
+/*!
+ * Ext JS Library 3.0.0
+ * Copyright(c) 2006-2009 Ext JS, LLC
+ * licensing@extjs.com
+ * http://www.extjs.com/license
+ */
+
+/* Fix for Opera, which does not seem to include the map function on Array's */
+if (!Array.prototype.map) {
+    Array.prototype.map = function(fun){
+        var len = this.length;
+        if (typeof fun != 'function') {
+            throw new TypeError();
+        }
+        var res = new Array(len);
+        var thisp = arguments[1];
+        for (var i = 0; i < len; i++) {
+            if (i in this) {
+                res[i] = fun.call(thisp, this[i], i, this);
+            }
+        }
+        return res;
+    };
+}
+
+Ext.ns('Ext.ux.data');
+
+/**
+ * @class Ext.ux.data.PagingMemoryProxy
+ * @extends Ext.data.MemoryProxy
+ * <p>Paging Memory Proxy, allows to use paging grid with in memory dataset</p>
+ */
+Ext.ux.data.PagingMemoryProxy = Ext.extend(Ext.data.MemoryProxy, {
+    constructor : function(data){
+        Ext.ux.data.PagingMemoryProxy.superclass.constructor.call(this);
+        this.data = data;
+    },
+    doRequest : function(action, rs, params, reader, callback, scope, options){
+        params = params ||
+        {};
+        var result;
+        try {
+            result = reader.readRecords(this.data);
+        } 
+        catch (e) {
+            this.fireEvent('loadexception', this, options, null, e);
+            callback.call(scope, null, options, false);
+            return;
+        }
+        
+        // filtering
+        if (params.filter !== undefined) {
+            result.records = result.records.filter(function(el){
+                if (typeof(el) == 'object') {
+                    var att = params.filterCol || 0;
+                    return String(el.data[att]).match(params.filter) ? true : false;
+                }
+                else {
+                    return String(el).match(params.filter) ? true : false;
+                }
+            });
+            result.totalRecords = result.records.length;
+        }
+        
+        // sorting
+        if (params.sort !== undefined) {
+            // use integer as params.sort to specify column, since arrays are not named
+            // params.sort=0; would also match a array without columns
+            var dir = String(params.dir).toUpperCase() == 'DESC' ? -1 : 1;
+            var fn = function(r1, r2){
+                return r1 < r2;
+            };
+            result.records.sort(function(a, b){
+                var v = 0;
+                if (typeof(a) == 'object') {
+                    v = fn(a.data[params.sort], b.data[params.sort]) * dir;
+                }
+                else {
+                    v = fn(a, b) * dir;
+                }
+                if (v == 0) {
+                    v = (a.index < b.index ? -1 : 1);
+                }
+                return v;
+            });
+        }
+        // paging (use undefined cause start can also be 0 (thus false))
+        if (params.start !== undefined && params.limit !== undefined) {
+            result.records = result.records.slice(params.start, params.start + params.limit);
+        }
+        callback.call(scope, result, options, true);
+    }
+});
+
+//backwards compat.
+Ext.data.PagingMemoryProxy = Ext.ux.data.PagingMemoryProxy;