shubhadownloader
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JavaScript
/**
* @class Ext.ux.grid.filter.Filter
* @extends Ext.util.Observable
* Abstract base class for filter implementations.
*/
Ext.define('Ext.ux.grid.filter.Filter', {
extend: 'Ext.util.Observable',
/**
* @cfg {Boolean} active
* Indicates the initial status of the filter (defaults to false).
*/
active : false,
/**
* True if this filter is active. Use setActive() to alter after configuration.
* @type Boolean
* @property active
*/
/**
* @cfg {String} dataIndex
* The {@link Ext.data.Store} dataIndex of the field this filter represents.
* The dataIndex does not actually have to exist in the store.
*/
dataIndex : null,
/**
* The filter configuration menu that will be installed into the filter submenu of a column menu.
* @type Ext.menu.Menu
* @property
*/
menu : null,
/**
* @cfg {Number} updateBuffer
* Number of milliseconds to wait after user interaction to fire an update. Only supported
* by filters: 'list', 'numeric', and 'string'. Defaults to 500.
*/
updateBuffer : 500,
constructor : function (config) {
Ext.apply(this, config);
this.addEvents(
/**
* @event activate
* Fires when an inactive filter becomes active
* @param {Ext.ux.grid.filter.Filter} this
*/
'activate',
/**
* @event deactivate
* Fires when an active filter becomes inactive
* @param {Ext.ux.grid.filter.Filter} this
*/
'deactivate',
/**
* @event serialize
* Fires after the serialization process. Use this to attach additional parameters to serialization
* data before it is encoded and sent to the server.
* @param {Array/Object} data A map or collection of maps representing the current filter configuration.
* @param {Ext.ux.grid.filter.Filter} filter The filter being serialized.
*/
'serialize',
/**
* @event update
* Fires when a filter configuration has changed
* @param {Ext.ux.grid.filter.Filter} this The filter object.
*/
'update'
);
Ext.ux.grid.filter.Filter.superclass.constructor.call(this);
this.menu = this.createMenu(config);
this.init(config);
if(config && config.value){
this.setValue(config.value);
this.setActive(config.active !== false, true);
delete config.value;
}
},
/**
* Destroys this filter by purging any event listeners, and removing any menus.
*/
destroy : function(){
if (this.menu){
this.menu.destroy();
}
this.clearListeners();
},
/**
* Template method to be implemented by all subclasses that is to
* initialize the filter and install required menu items.
* Defaults to Ext.emptyFn.
*/
init : Ext.emptyFn,
/**
* @private @override
* Creates the Menu for this filter.
* @param {Object} config Filter configuration
* @return {Ext.menu.Menu}
*/
createMenu: function(config) {
return Ext.create('Ext.menu.Menu', config);
},
/**
* Template method to be implemented by all subclasses that is to
* get and return the value of the filter.
* Defaults to Ext.emptyFn.
* @return {Object} The 'serialized' form of this filter
* @methodOf Ext.ux.grid.filter.Filter
*/
getValue : Ext.emptyFn,
/**
* Template method to be implemented by all subclasses that is to
* set the value of the filter and fire the 'update' event.
* Defaults to Ext.emptyFn.
* @param {Object} data The value to set the filter
* @methodOf Ext.ux.grid.filter.Filter
*/
setValue : Ext.emptyFn,
/**
* Template method to be implemented by all subclasses that is to
* return <tt>true</tt> if the filter has enough configuration information to be activated.
* Defaults to <tt>return true</tt>.
* @return {Boolean}
*/
isActivatable : function(){
return true;
},
/**
* Template method to be implemented by all subclasses that is to
* get and return serialized filter data for transmission to the server.
* Defaults to Ext.emptyFn.
*/
getSerialArgs : Ext.emptyFn,
/**
* Template method to be implemented by all subclasses that is to
* validates the provided Ext.data.Record against the filters configuration.
* Defaults to <tt>return true</tt>.
* @param {Ext.data.Record} record The record to validate
* @return {Boolean} true if the record is valid within the bounds
* of the filter, false otherwise.
*/
validateRecord : function(){
return true;
},
/**
* Returns the serialized filter data for transmission to the server
* and fires the 'serialize' event.
* @return {Object/Array} An object or collection of objects containing
* key value pairs representing the current configuration of the filter.
* @methodOf Ext.ux.grid.filter.Filter
*/
serialize : function(){
var args = this.getSerialArgs();
this.fireEvent('serialize', args, this);
return args;
},
/** @private */
fireUpdate : function(){
if (this.active) {
this.fireEvent('update', this);
}
this.setActive(this.isActivatable());
},
/**
* Sets the status of the filter and fires the appropriate events.
* @param {Boolean} active The new filter state.
* @param {Boolean} suppressEvent True to prevent events from being fired.
* @methodOf Ext.ux.grid.filter.Filter
*/
setActive : function(active, suppressEvent){
if(this.active != active){
this.active = active;
if (suppressEvent !== true) {
this.fireEvent(active ? 'activate' : 'deactivate', this);
}
}
}
});