lixinru
/
YtIoT


			
				
					
						
						
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125
							<!DOCTYPE html>
<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>
  <style type="text/css">
    .highlight { display: block; background-color: #ddd; }
  </style>
  <script type="text/javascript">
    function highlight() {
      document.getElementById(location.hash.replace(/#/, "")).className = "highlight";
    }
  </script>
</head>
<body onload="prettyPrint(); highlight();">
  <pre class="prettyprint lang-js"><span id='Ext-util-Bindable'>/**
</span> * This class is used as a mixin.
 *
 * This class is to be used to provide basic methods for binding/unbinding stores to other
 * classes. In general it will not be used directly.
 */
Ext.define('Ext.util.Bindable', {
    
<span id='Ext-util-Bindable-method-bindStore'>    /**
</span>     * Binds a store to this instance.
     * @param {Ext.data.AbstractStore/String} [store] The store to bind or ID of the store.
     * When no store given (or when `null` or `undefined` passed), unbinds the existing store.
     * @param {Boolean} [initial=false] True to not remove listeners from existing store.
     */
    bindStore: function(store, initial){
        var me = this,
            oldStore = me.store;
        
        if (!initial &amp;&amp; me.store) {
            // Perform implementation-specific unbinding operations *before* possible Store destruction.
            me.onUnbindStore(oldStore, initial);

            if (store !== oldStore &amp;&amp; oldStore.autoDestroy) {
                oldStore.destroyStore();
            } else {
                me.unbindStoreListeners(oldStore);
            }
        }
        if (store) {
            store = Ext.data.StoreManager.lookup(store);
            me.bindStoreListeners(store);
            me.onBindStore(store, initial);
        }
        me.store = store || null;
        return me;
    },
    
<span id='Ext-util-Bindable-method-getStore'>    /**
</span>     * Gets the current store instance.
     * @return {Ext.data.AbstractStore} The store, null if one does not exist.
     */
    getStore: function(){
        return this.store;
    },
    
<span id='Ext-util-Bindable-method-unbindStoreListeners'>    /**
</span>     * Unbinds listeners from this component to the store. By default it will remove
     * anything bound by the bindStoreListeners method, however it can be overridden
     * in a subclass to provide any more complicated handling.
     * @protected 
     * @param {Ext.data.AbstractStore} store The store to unbind from
     */
    unbindStoreListeners: function(store) {
        // Can be overridden in the subclass for more complex removal
        var listeners = this.storeListeners;
        if (listeners) {
            store.un(listeners);
        }
    },
    
<span id='Ext-util-Bindable-method-bindStoreListeners'>    /**
</span>     * Binds listeners for this component to the store. By default it will add
     * anything bound by the getStoreListeners method, however it can be overridden
     * in a subclass to provide any more complicated handling.
     * @protected 
     * @param {Ext.data.AbstractStore} store The store to bind to
     */
    bindStoreListeners: function(store) {
        // Can be overridden in the subclass for more complex binding
        var me = this,
            listeners = Ext.apply({}, me.getStoreListeners());
            
        if (!listeners.scope) {
            listeners.scope = me;
        }
        me.storeListeners = listeners;
        store.on(listeners);
    },
    
<span id='Ext-util-Bindable-method-getStoreListeners'>    /**
</span>     * Gets the listeners to bind to a new store.
     * @protected
     * @return {Object} The listeners to be bound to the store in object literal form. The scope
     * may be omitted, it is assumed to be the current instance.
     */
    getStoreListeners: Ext.emptyFn,
    
<span id='Ext-util-Bindable-method-onUnbindStore'>    /**
</span>     * Template method, it is called when an existing store is unbound
     * from the current instance.
     * @protected
     * @param {Ext.data.AbstractStore} store The store being unbound
     * @param {Boolean} initial True if this store is being bound as initialization of the instance.
     */
    onUnbindStore: Ext.emptyFn,
    
<span id='Ext-util-Bindable-method-onBindStore'>    /**
</span>     * Template method, it is called when a new store is bound
     * to the current instance.
     * @protected
     * @param {Ext.data.AbstractStore} store The store being bound
     * @param {Boolean} initial True if this store is being bound as initialization of the instance.
     */
    onBindStore: Ext.emptyFn    
});
</pre>
</body>
</html>