tvheadend/vendor/ext-3.4.1/docs/source/Record.html
Adam Sutton bafcfff42d webui: restructure webui/extjs source files
I want to keep the 3rd-party packages away from the main source
where possible.
2013-06-03 17:11:01 +01:00

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<pre class="prettyprint lang-js"><span id='Ext-data-Record-method-constructor'><span id='Ext-data-Record'>/**
</span></span> * @class Ext.data.Record
* &lt;p&gt;Instances of this class encapsulate both Record &lt;em&gt;definition&lt;/em&gt; information, and Record
* &lt;em&gt;value&lt;/em&gt; information for use in {@link Ext.data.Store} objects, or any code which needs
* to access Records cached in an {@link Ext.data.Store} object.&lt;/p&gt;
* &lt;p&gt;Constructors for this class are generated by passing an Array of field definition objects to {@link #create}.
* Instances are usually only created by {@link Ext.data.Reader} implementations when processing unformatted data
* objects.&lt;/p&gt;
* &lt;p&gt;Note that an instance of a Record class may only belong to one {@link Ext.data.Store Store} at a time.
* In order to copy data from one Store to another, use the {@link #copy} method to create an exact
* copy of the Record, and insert the new instance into the other Store.&lt;/p&gt;
* &lt;p&gt;When serializing a Record for submission to the server, be aware that it contains many private
* properties, and also a reference to its owning Store which in turn holds references to its Records.
* This means that a whole Record may not be encoded using {@link Ext.util.JSON.encode}. Instead, use the
* &lt;code&gt;{@link #data}&lt;/code&gt; and &lt;code&gt;{@link #id}&lt;/code&gt; properties.&lt;/p&gt;
* &lt;p&gt;Record objects generated by this constructor inherit all the methods of Ext.data.Record listed below.&lt;/p&gt;
* @constructor
* &lt;p&gt;This constructor should not be used to create Record objects. Instead, use {@link #create} to
* generate a subclass of Ext.data.Record configured with information about its constituent fields.&lt;p&gt;
* &lt;p&gt;&lt;b&gt;The generated constructor has the same signature as this constructor.&lt;/b&gt;&lt;/p&gt;
* @param {Object} data (Optional) An object, the properties of which provide values for the new Record's
* fields. If not specified the &lt;code&gt;{@link Ext.data.Field#defaultValue defaultValue}&lt;/code&gt;
* for each field will be assigned.
* @param {Object} id (Optional) The id of the Record. The id is used by the
* {@link Ext.data.Store} object which owns the Record to index its collection
* of Records (therefore this id should be unique within each store). If an
* &lt;code&gt;id&lt;/code&gt; is not specified a &lt;b&gt;&lt;code&gt;{@link #phantom}&lt;/code&gt;&lt;/b&gt;
* Record will be created with an {@link #Record.id automatically generated id}.
*/
Ext.data.Record = function(data, id){
// if no id, call the auto id method
this.id = (id || id === 0) ? id : Ext.data.Record.id(this);
this.data = data || {};
};
<span id='Ext-data-Record-static-method-create'>/**
</span> * Generate a constructor for a specific Record layout.
* @param {Array} o An Array of &lt;b&gt;{@link Ext.data.Field Field}&lt;/b&gt; definition objects.
* The constructor generated by this method may be used to create new Record instances. The data
* object must contain properties named after the {@link Ext.data.Field field}
* &lt;b&gt;&lt;tt&gt;{@link Ext.data.Field#name}s&lt;/tt&gt;&lt;/b&gt;. Example usage:&lt;pre&gt;&lt;code&gt;
// create a Record constructor from a description of the fields
var TopicRecord = Ext.data.Record.create([ // creates a subclass of Ext.data.Record
{{@link Ext.data.Field#name name}: 'title', {@link Ext.data.Field#mapping mapping}: 'topic_title'},
{name: 'author', mapping: 'username', allowBlank: false},
{name: 'totalPosts', mapping: 'topic_replies', type: 'int'},
{name: 'lastPost', mapping: 'post_time', type: 'date'},
{name: 'lastPoster', mapping: 'user2'},
{name: 'excerpt', mapping: 'post_text', allowBlank: false},
// In the simplest case, if no properties other than &lt;tt&gt;name&lt;/tt&gt; are required,
// a field definition may consist of just a String for the field name.
'signature'
]);
// create Record instance
var myNewRecord = new TopicRecord(
{
title: 'Do my job please',
author: 'noobie',
totalPosts: 1,
lastPost: new Date(),
lastPoster: 'Animal',
excerpt: 'No way dude!',
signature: ''
},
id // optionally specify the id of the record otherwise {@link #Record.id one is auto-assigned}
);
myStore.{@link Ext.data.Store#add add}(myNewRecord);
&lt;/code&gt;&lt;/pre&gt;
* @method create
* @return {Function} A constructor which is used to create new Records according
* to the definition. The constructor has the same signature as {@link #Record}.
* @static
*/
Ext.data.Record.create = function(o){
var f = Ext.extend(Ext.data.Record, {});
var p = f.prototype;
p.fields = new Ext.util.MixedCollection(false, function(field){
return field.name;
});
for(var i = 0, len = o.length; i &lt; len; i++){
p.fields.add(new Ext.data.Field(o[i]));
}
f.getField = function(name){
return p.fields.get(name);
};
return f;
};
Ext.data.Record.PREFIX = 'ext-record';
Ext.data.Record.AUTO_ID = 1;
Ext.data.Record.EDIT = 'edit';
Ext.data.Record.REJECT = 'reject';
Ext.data.Record.COMMIT = 'commit';
<span id='Ext-data-Record-method-id'>/**
</span> * Generates a sequential id. This method is typically called when a record is {@link #create}d
* and {@link #Record no id has been specified}. The returned id takes the form:
* &lt;tt&gt;&amp;#123;PREFIX}-&amp;#123;AUTO_ID}&lt;/tt&gt;.&lt;div class=&quot;mdetail-params&quot;&gt;&lt;ul&gt;
* &lt;li&gt;&lt;b&gt;&lt;tt&gt;PREFIX&lt;/tt&gt;&lt;/b&gt; : String&lt;p class=&quot;sub-desc&quot;&gt;&lt;tt&gt;Ext.data.Record.PREFIX&lt;/tt&gt;
* (defaults to &lt;tt&gt;'ext-record'&lt;/tt&gt;)&lt;/p&gt;&lt;/li&gt;
* &lt;li&gt;&lt;b&gt;&lt;tt&gt;AUTO_ID&lt;/tt&gt;&lt;/b&gt; : String&lt;p class=&quot;sub-desc&quot;&gt;&lt;tt&gt;Ext.data.Record.AUTO_ID&lt;/tt&gt;
* (defaults to &lt;tt&gt;1&lt;/tt&gt; initially)&lt;/p&gt;&lt;/li&gt;
* &lt;/ul&gt;&lt;/div&gt;
* @param {Record} rec The record being created. The record does not exist, it's a {@link #phantom}.
* @return {String} auto-generated string id, &lt;tt&gt;&quot;ext-record-i++'&lt;/tt&gt;;
*/
Ext.data.Record.id = function(rec) {
rec.phantom = true;
return [Ext.data.Record.PREFIX, '-', Ext.data.Record.AUTO_ID++].join('');
};
Ext.data.Record.prototype = {
<span id='Ext-data-Record-property-fields'> /**
</span> * &lt;p&gt;&lt;b&gt;This property is stored in the Record definition's &lt;u&gt;prototype&lt;/u&gt;&lt;/b&gt;&lt;/p&gt;
* A MixedCollection containing the defined {@link Ext.data.Field Field}s for this Record. Read-only.
* @property fields
* @type Ext.util.MixedCollection
*/
<span id='Ext-data-Record-property-data'> /**
</span> * An object hash representing the data for this Record. Every field name in the Record definition
* is represented by a property of that name in this object. Note that unless you specified a field
* with {@link Ext.data.Field#name name} &quot;id&quot; in the Record definition, this will &lt;b&gt;not&lt;/b&gt; contain
* an &lt;tt&gt;id&lt;/tt&gt; property.
* @property data
* @type {Object}
*/
<span id='Ext-data-Record-property-id'> /**
</span> * The unique ID of the Record {@link #Record as specified at construction time}.
* @property id
* @type {Object}
*/
<span id='Ext-data-Record-property-node'> /**
</span> * &lt;p&gt;&lt;b&gt;Only present if this Record was created by an {@link Ext.data.XmlReader XmlReader}&lt;/b&gt;.&lt;/p&gt;
* &lt;p&gt;The XML element which was the source of the data for this Record.&lt;/p&gt;
* @property node
* @type {XMLElement}
*/
<span id='Ext-data-Record-property-json'> /**
</span> * &lt;p&gt;&lt;b&gt;Only present if this Record was created by an {@link Ext.data.ArrayReader ArrayReader} or a {@link Ext.data.JsonReader JsonReader}&lt;/b&gt;.&lt;/p&gt;
* &lt;p&gt;The Array or object which was the source of the data for this Record.&lt;/p&gt;
* @property json
* @type {Array|Object}
*/
<span id='Ext-data-Record-property-dirty'> /**
</span> * Readonly flag - true if this Record has been modified.
* @type Boolean
*/
dirty : false,
editing : false,
error : null,
<span id='Ext-data-Record-property-modified'> /**
</span> * This object contains a key and value storing the original values of all modified
* fields or is null if no fields have been modified.
* @property modified
* @type {Object}
*/
modified : null,
<span id='Ext-data-Record-property-phantom'> /**
</span> * &lt;tt&gt;true&lt;/tt&gt; when the record does not yet exist in a server-side database (see
* {@link #markDirty}). Any record which has a real database pk set as its id property
* is NOT a phantom -- it's real.
* @property phantom
* @type {Boolean}
*/
phantom : false,
// private
join : function(store){
<span id='Ext-data-Record-property-store'> /**
</span> * The {@link Ext.data.Store} to which this Record belongs.
* @property store
* @type {Ext.data.Store}
*/
this.store = store;
},
<span id='Ext-data-Record-method-set'> /**
</span> * Set the {@link Ext.data.Field#name named field} to the specified value. For example:
* &lt;pre&gt;&lt;code&gt;
// record has a field named 'firstname'
var Employee = Ext.data.Record.{@link #create}([
{name: 'firstname'},
...
]);
// update the 2nd record in the store:
var rec = myStore.{@link Ext.data.Store#getAt getAt}(1);
// set the value (shows dirty flag):
rec.set('firstname', 'Betty');
// commit the change (removes dirty flag):
rec.{@link #commit}();
// update the record in the store, bypass setting dirty flag,
// and do not store the change in the {@link Ext.data.Store#getModifiedRecords modified records}
rec.{@link #data}['firstname'] = 'Wilma'; // updates record, but not the view
rec.{@link #commit}(); // updates the view
* &lt;/code&gt;&lt;/pre&gt;
* &lt;b&gt;Notes&lt;/b&gt;:&lt;div class=&quot;mdetail-params&quot;&gt;&lt;ul&gt;
* &lt;li&gt;If the store has a writer and &lt;code&gt;autoSave=true&lt;/code&gt;, each set()
* will execute an XHR to the server.&lt;/li&gt;
* &lt;li&gt;Use &lt;code&gt;{@link #beginEdit}&lt;/code&gt; to prevent the store's &lt;code&gt;update&lt;/code&gt;
* event firing while using set().&lt;/li&gt;
* &lt;li&gt;Use &lt;code&gt;{@link #endEdit}&lt;/code&gt; to have the store's &lt;code&gt;update&lt;/code&gt;
* event fire.&lt;/li&gt;
* &lt;/ul&gt;&lt;/div&gt;
* @param {String} name The {@link Ext.data.Field#name name of the field} to set.
* @param {String/Object/Array} value The value to set the field to.
*/
set : function(name, value){
var encode = Ext.isPrimitive(value) ? String : Ext.encode;
if(encode(this.data[name]) == encode(value)) {
return;
}
this.dirty = true;
if(!this.modified){
this.modified = {};
}
if(this.modified[name] === undefined){
this.modified[name] = this.data[name];
}
this.data[name] = value;
if(!this.editing){
this.afterEdit();
}
},
// private
afterEdit : function(){
if (this.store != undefined &amp;&amp; typeof this.store.afterEdit == &quot;function&quot;) {
this.store.afterEdit(this);
}
},
// private
afterReject : function(){
if(this.store){
this.store.afterReject(this);
}
},
// private
afterCommit : function(){
if(this.store){
this.store.afterCommit(this);
}
},
<span id='Ext-data-Record-method-get'> /**
</span> * Get the value of the {@link Ext.data.Field#name named field}.
* @param {String} name The {@link Ext.data.Field#name name of the field} to get the value of.
* @return {Object} The value of the field.
*/
get : function(name){
return this.data[name];
},
<span id='Ext-data-Record-method-beginEdit'> /**
</span> * Begin an edit. While in edit mode, no events (e.g.. the &lt;code&gt;update&lt;/code&gt; event)
* are relayed to the containing store.
* See also: &lt;code&gt;{@link #endEdit}&lt;/code&gt; and &lt;code&gt;{@link #cancelEdit}&lt;/code&gt;.
*/
beginEdit : function(){
this.editing = true;
this.modified = this.modified || {};
},
<span id='Ext-data-Record-method-cancelEdit'> /**
</span> * Cancels all changes made in the current edit operation.
*/
cancelEdit : function(){
this.editing = false;
delete this.modified;
},
<span id='Ext-data-Record-method-endEdit'> /**
</span> * End an edit. If any data was modified, the containing store is notified
* (ie, the store's &lt;code&gt;update&lt;/code&gt; event will fire).
*/
endEdit : function(){
this.editing = false;
if(this.dirty){
this.afterEdit();
}
},
<span id='Ext-data-Record-method-reject'> /**
</span> * Usually called by the {@link Ext.data.Store} which owns the Record.
* Rejects all changes made to the Record since either creation, or the last commit operation.
* Modified fields are reverted to their original values.
* &lt;p&gt;Developers should subscribe to the {@link Ext.data.Store#update} event
* to have their code notified of reject operations.&lt;/p&gt;
* @param {Boolean} silent (optional) True to skip notification of the owning
* store of the change (defaults to false)
*/
reject : function(silent){
var m = this.modified;
for(var n in m){
if(typeof m[n] != &quot;function&quot;){
this.data[n] = m[n];
}
}
this.dirty = false;
delete this.modified;
this.editing = false;
if(silent !== true){
this.afterReject();
}
},
<span id='Ext-data-Record-method-commit'> /**
</span> * Usually called by the {@link Ext.data.Store} which owns the Record.
* Commits all changes made to the Record since either creation, or the last commit operation.
* &lt;p&gt;Developers should subscribe to the {@link Ext.data.Store#update} event
* to have their code notified of commit operations.&lt;/p&gt;
* @param {Boolean} silent (optional) True to skip notification of the owning
* store of the change (defaults to false)
*/
commit : function(silent){
this.dirty = false;
delete this.modified;
this.editing = false;
if(silent !== true){
this.afterCommit();
}
},
<span id='Ext-data-Record-method-getChanges'> /**
</span> * Gets a hash of only the fields that have been modified since this Record was created or commited.
* @return Object
*/
getChanges : function(){
var m = this.modified, cs = {};
for(var n in m){
if(m.hasOwnProperty(n)){
cs[n] = this.data[n];
}
}
return cs;
},
// private
hasError : function(){
return this.error !== null;
},
// private
clearError : function(){
this.error = null;
},
<span id='Ext-data-Record-method-copy'> /**
</span> * Creates a copy (clone) of this Record.
* @param {String} id (optional) A new Record id, defaults to the id
* of the record being copied. See &lt;code&gt;{@link #id}&lt;/code&gt;.
* To generate a phantom record with a new id use:&lt;pre&gt;&lt;code&gt;
var rec = record.copy(); // clone the record
Ext.data.Record.id(rec); // automatically generate a unique sequential id
* &lt;/code&gt;&lt;/pre&gt;
* @return {Record}
*/
copy : function(newId) {
return new this.constructor(Ext.apply({}, this.data), newId || this.id);
},
<span id='Ext-data-Record-method-isModified'> /**
</span> * Returns &lt;tt&gt;true&lt;/tt&gt; if the passed field name has been &lt;code&gt;{@link #modified}&lt;/code&gt;
* since the load or last commit.
* @param {String} fieldName {@link Ext.data.Field.{@link Ext.data.Field#name}
* @return {Boolean}
*/
isModified : function(fieldName){
return !!(this.modified &amp;&amp; this.modified.hasOwnProperty(fieldName));
},
<span id='Ext-data-Record-method-isValid'> /**
</span> * By default returns &lt;tt&gt;false&lt;/tt&gt; if any {@link Ext.data.Field field} within the
* record configured with &lt;tt&gt;{@link Ext.data.Field#allowBlank} = false&lt;/tt&gt; returns
* &lt;tt&gt;true&lt;/tt&gt; from an {@link Ext}.{@link Ext#isEmpty isempty} test.
* @return {Boolean}
*/
isValid : function() {
return this.fields.find(function(f) {
return (f.allowBlank === false &amp;&amp; Ext.isEmpty(this.data[f.name])) ? true : false;
},this) ? false : true;
},
<span id='Ext-data-Record-method-markDirty'> /**
</span> * &lt;p&gt;Marks this &lt;b&gt;Record&lt;/b&gt; as &lt;code&gt;{@link #dirty}&lt;/code&gt;. This method
* is used interally when adding &lt;code&gt;{@link #phantom}&lt;/code&gt; records to a
* {@link Ext.data.Store#writer writer enabled store}.&lt;/p&gt;
* &lt;br&gt;&lt;p&gt;Marking a record &lt;code&gt;{@link #dirty}&lt;/code&gt; causes the phantom to
* be returned by {@link Ext.data.Store#getModifiedRecords} where it will
* have a create action composed for it during {@link Ext.data.Store#save store save}
* operations.&lt;/p&gt;
*/
markDirty : function(){
this.dirty = true;
if(!this.modified){
this.modified = {};
}
this.fields.each(function(f) {
this.modified[f.name] = this.data[f.name];
},this);
}
};
</pre>
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