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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>The source code</title>
<link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />
<script type="text/javascript" src="../resources/prettify/prettify.js"></script>
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<body onload="prettyPrint();">
<pre class="prettyprint lang-js">/*!
* Ext JS Library 3.4.0
* Copyright(c) 2006-2011 Sencha Inc.
* licensing@sencha.com
* http://www.sencha.com/license
*/
<div id="cls-Ext.CycleButton"></div>/**
* @class Ext.CycleButton
* @extends Ext.SplitButton
* A specialized SplitButton that contains a menu of {@link Ext.menu.CheckItem} elements. The button automatically
* cycles through each menu item on click, raising the button's {@link #change} event (or calling the button's
* {@link #changeHandler} function, if supplied) for the active menu item. Clicking on the arrow section of the
* button displays the dropdown menu just like a normal SplitButton. Example usage:
* <pre><code>
var btn = new Ext.CycleButton({
showText: true,
prependText: 'View as ',
items: [{
text:'text only',
iconCls:'view-text',
checked:true
},{
text:'HTML',
iconCls:'view-html'
}],
changeHandler:function(btn, item){
Ext.Msg.alert('Change View', item.text);
}
});
</code></pre>
* @constructor
* Create a new split button
* @param {Object} config The config object
* @xtype cycle
*/
Ext.CycleButton = Ext.extend(Ext.SplitButton, {
<div id="cfg-Ext.CycleButton-items"></div>/**
* @cfg {Array} items An array of {@link Ext.menu.CheckItem} <b>config</b> objects to be used when creating the
* button's menu items (e.g., {text:'Foo', iconCls:'foo-icon'})
*/
<div id="cfg-Ext.CycleButton-showText"></div>/**
* @cfg {Boolean} showText True to display the active item's text as the button text (defaults to false)
*/
<div id="cfg-Ext.CycleButton-prependText"></div>/**
* @cfg {String} prependText A static string to prepend before the active item's text when displayed as the
* button's text (only applies when showText = true, defaults to '')
*/
<div id="cfg-Ext.CycleButton-changeHandler"></div>/**
* @cfg {Function} changeHandler A callback function that will be invoked each time the active menu
* item in the button's menu has changed. If this callback is not supplied, the SplitButton will instead
* fire the {@link #change} event on active item change. The changeHandler function will be called with the
* following argument list: (SplitButton this, Ext.menu.CheckItem item)
*/
<div id="cfg-Ext.CycleButton-forceIcon"></div>/**
* @cfg {String} forceIcon A css class which sets an image to be used as the static icon for this button. This
* icon will always be displayed regardless of which item is selected in the dropdown list. This overrides the
* default behavior of changing the button's icon to match the selected item's icon on change.
*/
<div id="prop-Ext.CycleButton-menu"></div>/**
* @property menu
* @type Menu
* The {@link Ext.menu.Menu Menu} object used to display the {@link Ext.menu.CheckItem CheckItems} representing the available choices.
*/
// private
getItemText : function(item){
if(item && this.showText === true){
var text = '';
if(this.prependText){
text += this.prependText;
}
text += item.text;
return text;
}
return undefined;
},
<div id="method-Ext.CycleButton-setActiveItem"></div>/**
* Sets the button's active menu item.
* @param {Ext.menu.CheckItem} item The item to activate
* @param {Boolean} suppressEvent True to prevent the button's change event from firing (defaults to false)
*/
setActiveItem : function(item, suppressEvent){
if(!Ext.isObject(item)){
item = this.menu.getComponent(item);
}
if(item){
if(!this.rendered){
this.text = this.getItemText(item);
this.iconCls = item.iconCls;
}else{
var t = this.getItemText(item);
if(t){
this.setText(t);
}
this.setIconClass(item.iconCls);
}
this.activeItem = item;
if(!item.checked){
item.setChecked(true, suppressEvent);
}
if(this.forceIcon){
this.setIconClass(this.forceIcon);
}
if(!suppressEvent){
this.fireEvent('change', this, item);
}
}
},
<div id="method-Ext.CycleButton-getActiveItem"></div>/**
* Gets the currently active menu item.
* @return {Ext.menu.CheckItem} The active item
*/
getActiveItem : function(){
return this.activeItem;
},
// private
initComponent : function(){
this.addEvents(
<div id="event-Ext.CycleButton-change"></div>/**
* @event change
* Fires after the button's active menu item has changed. Note that if a {@link #changeHandler} function
* is set on this CycleButton, it will be called instead on active item change and this change event will
* not be fired.
* @param {Ext.CycleButton} this
* @param {Ext.menu.CheckItem} item The menu item that was selected
*/
"change"
);
if(this.changeHandler){
this.on('change', this.changeHandler, this.scope||this);
delete this.changeHandler;
}
this.itemCount = this.items.length;
this.menu = {cls:'x-cycle-menu', items:[]};
var checked = 0;
Ext.each(this.items, function(item, i){
Ext.apply(item, {
group: item.group || this.id,
itemIndex: i,
checkHandler: this.checkHandler,
scope: this,
checked: item.checked || false
});
this.menu.items.push(item);
if(item.checked){
checked = i;
}
}, this);
Ext.CycleButton.superclass.initComponent.call(this);
this.on('click', this.toggleSelected, this);
this.setActiveItem(checked, true);
},
// private
checkHandler : function(item, pressed){
if(pressed){
this.setActiveItem(item);
}
},
<div id="method-Ext.CycleButton-toggleSelected"></div>/**
* This is normally called internally on button click, but can be called externally to advance the button's
* active item programmatically to the next one in the menu. If the current item is the last one in the menu
* the active item will be set to the first item in the menu.
*/
toggleSelected : function(){
var m = this.menu;
m.render();
// layout if we haven't before so the items are active
if(!m.hasLayout){
m.doLayout();
}
var nextIdx, checkItem;
for (var i = 1; i < this.itemCount; i++) {
nextIdx = (this.activeItem.itemIndex + i) % this.itemCount;
// check the potential item
checkItem = m.items.itemAt(nextIdx);
// if its not disabled then check it.
if (!checkItem.disabled) {
checkItem.setChecked(true);
break;
}
}
}
});
Ext.reg('cycle', Ext.CycleButton);</pre>
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