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- <pre class="prettyprint lang-js">/*!
- * Ext JS Library 3.2.1
- * Copyright(c) 2006-2010 Ext JS, Inc.
- * licensing@extjs.com
- * http://www.extjs.com/license
- */
-<div id="cls-Ext.list.Sorter"></div>/**
- * @class Ext.list.Sorter
- * @extends Ext.util.Observable
- * <p>Supporting Class for Ext.list.ListView</p>
- * @constructor
- * @param {Object} config
- */
-Ext.list.Sorter = Ext.extend(Ext.util.Observable, {
- <div id="cfg-Ext.list.Sorter-sortClasses"></div>/**
- * @cfg {Array} sortClasses
- * The CSS classes applied to a header when it is sorted. (defaults to <tt>["sort-asc", "sort-desc"]</tt>)
- */
- sortClasses : ["sort-asc", "sort-desc"],
+<body onload="prettyPrint(); highlight();">
+ <pre class="prettyprint lang-js"><span id='Ext-util-Sorter'>/**
+</span> * @class Ext.util.Sorter
+ * @extends Object
- constructor: function(config){
- Ext.apply(this, config);
- Ext.list.Sorter.superclass.constructor.call(this);
- },
+Represents a single sorter that can be applied to a Store. The sorter is used
+to compare two values against each other for the purpose of ordering them. Ordering
+is achieved by specifying either:
+- {@link #property A sorting property}
+- {@link #sorterFn A sorting function}
- init : function(listView){
- this.view = listView;
- listView.on('render', this.initEvents, this);
- },
+As a contrived example, we can specify a custom sorter that sorts by rank:
- initEvents : function(view){
- view.mon(view.innerHd, 'click', this.onHdClick, this);
- view.innerHd.setStyle('cursor', 'pointer');
- view.mon(view.store, 'datachanged', this.updateSortState, this);
- this.updateSortState.defer(10, this, [view.store]);
- },
+ Ext.define('Person', {
+ extend: 'Ext.data.Model',
+ fields: ['name', 'rank']
+ });
- updateSortState : function(store){
- var state = store.getSortState();
- if(!state){
- return;
- }
- this.sortState = state;
- var cs = this.view.columns, sortColumn = -1;
- for(var i = 0, len = cs.length; i < len; i++){
- if(cs[i].dataIndex == state.field){
- sortColumn = i;
- break;
+ Ext.create('Ext.data.Store', {
+ model: 'Person',
+ proxy: 'memory',
+ sorters: [{
+ sorterFn: function(o1, o2){
+ var getRank = function(o){
+ var name = o.get('rank');
+ if (name === 'first') {
+ return 1;
+ } else if (name === 'second') {
+ return 2;
+ } else {
+ return 3;
+ }
+ },
+ rank1 = getRank(o1),
+ rank2 = getRank(o2);
+
+ if (rank1 === rank2) {
+ return 0;
+ }
+
+ return rank1 < rank2 ? -1 : 1;
}
+ }],
+ data: [{
+ name: 'Person1',
+ rank: 'second'
+ }, {
+ name: 'Person2',
+ rank: 'third'
+ }, {
+ name: 'Person3',
+ rank: 'first'
+ }]
+ });
+
+ * @markdown
+ */
+Ext.define('Ext.util.Sorter', {
+
+<span id='Ext-util-Sorter-cfg-property'> /**
+</span> * @cfg {String} property The property to sort by. Required unless {@link #sorterFn} is provided.
+ * The property is extracted from the object directly and compared for sorting using the built in
+ * comparison operators.
+ */
+
+<span id='Ext-util-Sorter-cfg-sorterFn'> /**
+</span> * @cfg {Function} sorterFn A specific sorter function to execute. Can be passed instead of {@link #property}.
+ * This sorter function allows for any kind of custom/complex comparisons.
+ * The sorterFn receives two arguments, the objects being compared. The function should return:
+ * <ul>
+ * <li>-1 if o1 is "less than" o2</li>
+ * <li>0 if o1 is "equal" to o2</li>
+ * <li>1 if o1 is "greater than" o2</li>
+ * </ul>
+ */
+
+<span id='Ext-util-Sorter-cfg-root'> /**
+</span> * @cfg {String} root Optional root property. This is mostly useful when sorting a Store, in which case we set the
+ * root to 'data' to make the filter pull the {@link #property} out of the data object of each item
+ */
+
+<span id='Ext-util-Sorter-cfg-transform'> /**
+</span> * @cfg {Function} transform A function that will be run on each value before
+ * it is compared in the sorter. The function will receive a single argument,
+ * the value.
+ */
+
+<span id='Ext-util-Sorter-cfg-direction'> /**
+</span> * @cfg {String} direction The direction to sort by. Defaults to ASC
+ */
+ direction: "ASC",
+
+ constructor: function(config) {
+ var me = this;
+
+ Ext.apply(me, config);
+
+ //<debug>
+ if (me.property === undefined && me.sorterFn === undefined) {
+ Ext.Error.raise("A Sorter requires either a property or a sorter function");
}
- if(sortColumn != -1){
- var sortDir = state.direction;
- this.updateSortIcon(sortColumn, sortDir);
- }
+ //</debug>
+
+ me.updateSortFunction();
},
-
- updateSortIcon : function(col, dir){
- var sc = this.sortClasses;
- var hds = this.view.innerHd.select('em').removeClass(sc);
- hds.item(col).addClass(sc[dir == "DESC" ? 1 : 0]);
+
+<span id='Ext-util-Sorter-method-createSortFunction'> /**
+</span> * @private
+ * Creates and returns a function which sorts an array by the given property and direction
+ * @return {Function} A function which sorts by the property/direction combination provided
+ */
+ createSortFunction: function(sorterFn) {
+ var me = this,
+ property = me.property,
+ direction = me.direction || "ASC",
+ modifier = direction.toUpperCase() == "DESC" ? -1 : 1;
+
+ //create a comparison function. Takes 2 objects, returns 1 if object 1 is greater,
+ //-1 if object 2 is greater or 0 if they are equal
+ return function(o1, o2) {
+ return modifier * sorterFn.call(me, o1, o2);
+ };
},
-
- onHdClick : function(e){
- var hd = e.getTarget('em', 3);
- if(hd && !this.view.disableHeaders){
- var index = this.view.findHeaderIndex(hd);
- this.view.store.sort(this.view.columns[index].dataIndex);
+
+<span id='Ext-util-Sorter-method-defaultSorterFn'> /**
+</span> * @private
+ * Basic default sorter function that just compares the defined property of each object
+ */
+ defaultSorterFn: function(o1, o2) {
+ var me = this,
+ transform = me.transform,
+ v1 = me.getRoot(o1)[me.property],
+ v2 = me.getRoot(o2)[me.property];
+
+ if (transform) {
+ v1 = transform(v1);
+ v2 = transform(v2);
}
- }
-});
-// Backwards compatibility alias
-Ext.ListView.Sorter = Ext.list.Sorter;</pre>
+ return v1 > v2 ? 1 : (v1 < v2 ? -1 : 0);
+ },
+
+<span id='Ext-util-Sorter-method-getRoot'> /**
+</span> * @private
+ * Returns the root property of the given item, based on the configured {@link #root} property
+ * @param {Object} item The item
+ * @return {Object} The root property of the object
+ */
+ getRoot: function(item) {
+ return this.root === undefined ? item : item[this.root];
+ },
+
+<span id='Ext-util-Sorter-method-setDirection'> /**
+</span> * Set the sorting direction for this sorter.
+ * @param {String} direction The direction to sort in. Should be either 'ASC' or 'DESC'.
+ */
+ setDirection: function(direction) {
+ var me = this;
+ me.direction = direction;
+ me.updateSortFunction();
+ },
+
+<span id='Ext-util-Sorter-method-toggle'> /**
+</span> * Toggles the sorting direction for this sorter.
+ */
+ toggle: function() {
+ var me = this;
+ me.direction = Ext.String.toggle(me.direction, "ASC", "DESC");
+ me.updateSortFunction();
+ },
+
+<span id='Ext-util-Sorter-method-updateSortFunction'> /**
+</span> * Update the sort function for this sorter.
+ * @param {Function} fn (Optional) A new sorter function for this sorter. If not specified it will use the
+ * default sorting function.
+ */
+ updateSortFunction: function(fn) {
+ var me = this;
+ fn = fn || me.sorterFn || me.defaultSorterFn;
+ me.sort = me.createSortFunction(fn);
+ }
+});</pre>
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