Ext JS 4.0.7 Sencha Docs

Ext.Base

Subclasses

Files

The root of all classes created with Ext.define.

Ext.Base is the building block of all Ext classes. All classes in Ext inherit from Ext.Base. All prototype and static members of this class are inherited by all other classes.

Available since: 4.0.0

Defined By

Properties

Available since: 4.0.0

Ext.Base
view source
: Ext.Classprotected
Get the reference to the current class from which this object was instantiated. ...

Get the reference to the current class from which this object was instantiated. Unlike statics, this.self is scope-dependent and it's meant to be used for dynamic inheritance. See statics for a detailed comparison

Ext.define('My.Cat', {
    statics: {
        speciesName: 'Cat' // My.Cat.speciesName = 'Cat'
    },

    constructor: function() {
        alert(this.self.speciesName); / dependent on 'this'

        return this;
    },

    clone: function() {
        return new this.self();
    }
});


Ext.define('My.SnowLeopard', {
    extend: 'My.Cat',
    statics: {
        speciesName: 'Snow Leopard'         // My.SnowLeopard.speciesName = 'Snow Leopard'
    }
});

var cat = new My.Cat();                     // alerts 'Cat'
var snowLeopard = new My.SnowLeopard();     // alerts 'Snow Leopard'

var clone = snowLeopard.clone();
alert(Ext.getClassName(clone));             // alerts 'My.SnowLeopard'

Available since: 4.0.0

Methods

Defined By

Instance methods

Ext.Base
view source
( members ) : Ext.Basechainableprivate
...

Available since: 4.0.6

Parameters

Returns

Ext.Base
view source
( args ) : Objectprotected
Call the original method that was previously overridden with override Ext.define('My.Cat', { constructor: functi...

Call the original method that was previously overridden with override

Ext.define('My.Cat', {
    constructor: function() {
        alert("I'm a cat!");

        return this;
    }
});

My.Cat.override({
    constructor: function() {
        alert("I'm going to be a cat!");

        var instance = this.callOverridden();

        alert("Meeeeoooowwww");

        return instance;
    }
});

var kitty = new My.Cat(); // alerts "I'm going to be a cat!"
                          // alerts "I'm a cat!"
                          // alerts "Meeeeoooowwww"

Available since: 4.0.0

Parameters

  • args : Array/Arguments

    The arguments, either an array or the arguments object

Returns

  • Object

    Returns the result after calling the overridden method

Ext.Base
view source
( args ) : Objectprotected
Call the parent's overridden method. ...

Call the parent's overridden method. For example:

Ext.define('My.own.A', {
    constructor: function(test) {
        alert(test);
    }
});

Ext.define('My.own.B', {
    extend: 'My.own.A',

    constructor: function(test) {
        alert(test);

        this.callParent([test + 1]);
    }
});

Ext.define('My.own.C', {
    extend: 'My.own.B',

    constructor: function() {
        alert("Going to call parent's overriden constructor...");

        this.callParent(arguments);
    }
});

var a = new My.own.A(1); // alerts '1'
var b = new My.own.B(1); // alerts '1', then alerts '2'
var c = new My.own.C(2); // alerts "Going to call parent's overriden constructor..."
                         // alerts '2', then alerts '3'

Available since: 4.0.0

Parameters

  • args : Array/Arguments

    The arguments, either an array or the arguments object from the current method, for example: this.callParent(arguments)

Returns

  • Object

    Returns the result from the superclass' method

Ext.Base
view source
( config ) : Objectchainableprotected
Initialize configuration for this class. ...

Initialize configuration for this class. a typical example:

Ext.define('My.awesome.Class', {
    // The default config
    config: {
        name: 'Awesome',
        isAwesome: true
    },

    constructor: function(config) {
        this.initConfig(config);

        return this;
    }
});

var awesome = new My.awesome.Class({
    name: 'Super Awesome'
});

alert(awesome.getName()); // 'Super Awesome'

Available since: 4.0.0

Parameters

Returns

  • Object

    mixins The mixin prototypes as key - value pairs

Fires

    Ext.Base
    view source
    ( name, cls )private
    Used internally by the mixins pre-processor ...

    Used internally by the mixins pre-processor

    Available since: 4.0.6

    Parameters

    Fires

      Ext.Base
      view source
      ( name, value )private
      ...

      Available since: 4.0.6

      Parameters

      Fires

        Ext.Base
        view source
        ( name, fn )private
        ...

        Available since: 4.0.0

        Parameters

        Ext.Base
        view source
        ( config ) : Ext.Basechainableprivate
        ...

        Available since: 4.0.0

        Parameters

        Returns

        Fires

          Ext.Base
          view source
          ( ) : Ext.Classprotected
          Get the reference to the class from which this object was instantiated. ...

          Get the reference to the class from which this object was instantiated. Note that unlike self, this.statics() is scope-independent and it always returns the class from which it was called, regardless of what this points to during run-time

          Ext.define('My.Cat', {
              statics: {
                  totalCreated: 0,
                  speciesName: 'Cat' // My.Cat.speciesName = 'Cat'
              },
          
              constructor: function() {
                  var statics = this.statics();
          
                  alert(statics.speciesName);     // always equals to 'Cat' no matter what 'this' refers to
                                                  // equivalent to: My.Cat.speciesName
          
                  alert(this.self.speciesName);   // dependent on 'this'
          
                  statics.totalCreated++;
          
                  return this;
              },
          
              clone: function() {
                  var cloned = new this.self;                      // dependent on 'this'
          
                  cloned.groupName = this.statics().speciesName;   // equivalent to: My.Cat.speciesName
          
                  return cloned;
              }
          });
          
          
          Ext.define('My.SnowLeopard', {
              extend: 'My.Cat',
          
              statics: {
                  speciesName: 'Snow Leopard'     // My.SnowLeopard.speciesName = 'Snow Leopard'
              },
          
              constructor: function() {
                  this.callParent();
              }
          });
          
          var cat = new My.Cat();                 // alerts 'Cat', then alerts 'Cat'
          
          var snowLeopard = new My.SnowLeopard(); // alerts 'Cat', then alerts 'Snow Leopard'
          
          var clone = snowLeopard.clone();
          alert(Ext.getClassName(clone));         // alerts 'My.SnowLeopard'
          alert(clone.groupName);                 // alerts 'Cat'
          
          alert(My.Cat.totalCreated);             // alerts 3
          

          Available since: 4.0.0

          Returns

          Defined By

          Static methods

          Ext.Base
          view source
          ( members ) : Ext.Basechainablestatic
          Add / override static properties of this class. ...

          Add / override static properties of this class.

          Ext.define('My.cool.Class', {
              ...
          });
          
          My.cool.Class.addStatics({
              someProperty: 'someValue',      // My.cool.Class.someProperty = 'someValue'
              method1: function() { ... },    // My.cool.Class.method1 = function() { ... };
              method2: function() { ... }     // My.cool.Class.method2 = function() { ... };
          });
          

          Available since: 4.0.2

          Parameters

          Returns

          Ext.Base
          view source
          ( fromClass, members ) : Ext.Basechainablestatic
          Borrow another class' members to the prototype of this class. ...

          Borrow another class' members to the prototype of this class.

          Ext.define('Bank', {
              money: '$$$',
              printMoney: function() {
                  alert('$$$$$$$');
              }
          });
          
          Ext.define('Thief', {
              ...
          });
          
          Thief.borrow(Bank, ['money', 'printMoney']);
          
          var steve = new Thief();
          
          alert(steve.money); // alerts '$$$'
          steve.printMoney(); // alerts '$$$$$$$'
          

          Available since: 4.0.2

          Parameters

          • fromClass : Ext.Base

            The class to borrow members from

          • members : String/String[]

            The names of the members to borrow

          Returns

          Ext.Base
          view source
          ( ) : Objectstatic
          Create a new instance of this Class. ...

          Create a new instance of this Class.

          Ext.define('My.cool.Class', {
              ...
          });
          
          My.cool.Class.create({
              someConfig: true
          });
          

          All parameters are passed to the constructor of the class.

          Available since: 4.0.2

          Returns

          Ext.Base
          view source
          ( alias, origin )static
          Create aliases for existing prototype methods. ...

          Create aliases for existing prototype methods. Example:

          Ext.define('My.cool.Class', {
              method1: function() { ... },
              method2: function() { ... }
          });
          
          var test = new My.cool.Class();
          
          My.cool.Class.createAlias({
              method3: 'method1',
              method4: 'method2'
          });
          
          test.method3(); // test.method1()
          
          My.cool.Class.createAlias('method5', 'method3');
          
          test.method5(); // test.method3() -> test.method1()
          

          Available since: 4.0.2

          Parameters

          Ext.Base
          view source
          ( ) : Stringstatic
          Get the current class' name in string format. ...

          Get the current class' name in string format.

          Ext.define('My.cool.Class', {
              constructor: function() {
                  alert(this.self.getName()); // alerts 'My.cool.Class'
              }
          });
          
          My.cool.Class.getName(); // 'My.cool.Class'
          

          Available since: 4.0.4

          Returns

          Ext.Base
          view source
          ( members )static
          Add methods / properties to the prototype of this class. ...

          Add methods / properties to the prototype of this class.

          Ext.define('My.awesome.Cat', {
              constructor: function() {
                  ...
              }
          });
          
           My.awesome.Cat.implement({
               meow: function() {
                  alert('Meowww...');
               }
           });
          
           var kitty = new My.awesome.Cat;
           kitty.meow();
          

          Available since: 4.0.2

          Parameters

          Ext.Base
          view source
          ( members ) : Ext.Basechainablestatic
          Override prototype members of this class. ...

          Override prototype members of this class. Overridden methods can be invoked via callOverridden

          Ext.define('My.Cat', {
              constructor: function() {
                  alert("I'm a cat!");
          
                  return this;
              }
          });
          
          My.Cat.override({
              constructor: function() {
                  alert("I'm going to be a cat!");
          
                  var instance = this.callOverridden();
          
                  alert("Meeeeoooowwww");
          
                  return instance;
              }
          });
          
          var kitty = new My.Cat(); // alerts "I'm going to be a cat!"
                                    // alerts "I'm a cat!"
                                    // alerts "Meeeeoooowwww"
          

          Available since: 4.0.2

          Parameters

          Returns