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9 <pre class="prettyprint lang-js">/*!
10 * Ext JS Library 3.2.1
11 * Copyright(c) 2006-2010 Ext JS, Inc.
13 * http://www.extjs.com/license
15 <div id="cls-Ext.CycleButton"></div>/**
16 * @class Ext.CycleButton
17 * @extends Ext.SplitButton
18 * A specialized SplitButton that contains a menu of {@link Ext.menu.CheckItem} elements. The button automatically
19 * cycles through each menu item on click, raising the button's {@link #change} event (or calling the button's
20 * {@link #changeHandler} function, if supplied) for the active menu item. Clicking on the arrow section of the
21 * button displays the dropdown menu just like a normal SplitButton. Example usage:
23 var btn = new Ext.CycleButton({
25 prependText: 'View as ',
34 changeHandler:function(btn, item){
35 Ext.Msg.alert('Change View', item.text);
40 * Create a new split button
41 * @param {Object} config The config object
44 Ext.CycleButton = Ext.extend(Ext.SplitButton, {
45 <div id="cfg-Ext.CycleButton-items"></div>/**
46 * @cfg {Array} items An array of {@link Ext.menu.CheckItem} <b>config</b> objects to be used when creating the
47 * button's menu items (e.g., {text:'Foo', iconCls:'foo-icon'})
49 <div id="cfg-Ext.CycleButton-showText"></div>/**
50 * @cfg {Boolean} showText True to display the active item's text as the button text (defaults to false)
52 <div id="cfg-Ext.CycleButton-prependText"></div>/**
53 * @cfg {String} prependText A static string to prepend before the active item's text when displayed as the
54 * button's text (only applies when showText = true, defaults to '')
56 <div id="cfg-Ext.CycleButton-changeHandler"></div>/**
57 * @cfg {Function} changeHandler A callback function that will be invoked each time the active menu
58 * item in the button's menu has changed. If this callback is not supplied, the SplitButton will instead
59 * fire the {@link #change} event on active item change. The changeHandler function will be called with the
60 * following argument list: (SplitButton this, Ext.menu.CheckItem item)
62 <div id="cfg-Ext.CycleButton-forceIcon"></div>/**
63 * @cfg {String} forceIcon A css class which sets an image to be used as the static icon for this button. This
64 * icon will always be displayed regardless of which item is selected in the dropdown list. This overrides the
65 * default behavior of changing the button's icon to match the selected item's icon on change.
67 <div id="prop-Ext.CycleButton-menu"></div>/**
70 * The {@link Ext.menu.Menu Menu} object used to display the {@link Ext.menu.CheckItem CheckItems} representing the available choices.
74 getItemText : function(item){
75 if(item && this.showText === true){
78 text += this.prependText;
86 <div id="method-Ext.CycleButton-setActiveItem"></div>/**
87 * Sets the button's active menu item.
88 * @param {Ext.menu.CheckItem} item The item to activate
89 * @param {Boolean} suppressEvent True to prevent the button's change event from firing (defaults to false)
91 setActiveItem : function(item, suppressEvent){
92 if(!Ext.isObject(item)){
93 item = this.menu.getComponent(item);
97 this.text = this.getItemText(item);
98 this.iconCls = item.iconCls;
100 var t = this.getItemText(item);
104 this.setIconClass(item.iconCls);
106 this.activeItem = item;
108 item.setChecked(true, false);
111 this.setIconClass(this.forceIcon);
114 this.fireEvent('change', this, item);
119 <div id="method-Ext.CycleButton-getActiveItem"></div>/**
120 * Gets the currently active menu item.
121 * @return {Ext.menu.CheckItem} The active item
123 getActiveItem : function(){
124 return this.activeItem;
128 initComponent : function(){
130 <div id="event-Ext.CycleButton-change"></div>/**
132 * Fires after the button's active menu item has changed. Note that if a {@link #changeHandler} function
133 * is set on this CycleButton, it will be called instead on active item change and this change event will
135 * @param {Ext.CycleButton} this
136 * @param {Ext.menu.CheckItem} item The menu item that was selected
141 if(this.changeHandler){
142 this.on('change', this.changeHandler, this.scope||this);
143 delete this.changeHandler;
146 this.itemCount = this.items.length;
148 this.menu = {cls:'x-cycle-menu', items:[]};
150 Ext.each(this.items, function(item, i){
152 group: item.group || this.id,
154 checkHandler: this.checkHandler,
156 checked: item.checked || false
158 this.menu.items.push(item);
163 Ext.CycleButton.superclass.initComponent.call(this);
164 this.on('click', this.toggleSelected, this);
165 this.setActiveItem(checked, true);
169 checkHandler : function(item, pressed){
171 this.setActiveItem(item);
175 <div id="method-Ext.CycleButton-toggleSelected"></div>/**
176 * This is normally called internally on button click, but can be called externally to advance the button's
177 * active item programmatically to the next one in the menu. If the current item is the last one in the menu
178 * the active item will be set to the first item in the menu.
180 toggleSelected : function(){
183 // layout if we haven't before so the items are active
188 var nextIdx, checkItem;
189 for (var i = 1; i < this.itemCount; i++) {
190 nextIdx = (this.activeItem.itemIndex + i) % this.itemCount;
191 // check the potential item
192 checkItem = m.items.itemAt(nextIdx);
193 // if its not disabled then check it.
194 if (!checkItem.disabled) {
195 checkItem.setChecked(true);
201 Ext.reg('cycle', Ext.CycleButton);</pre>