Touch 2.0.2 Sencha Docs

Ext.env.Feature

Hierarchy

Ext.Base
Ext.env.Feature

Requires

Files

A class to detect if the current browser supports various features.

Please refer to the documentation of Ext.feature.has on how to use it.

if (Ext.feature.has.Canvas) {
    // do some cool things with canvas here
}

Available since: 2.0.0

Properties

Defined By

Instance properties

Ext.env.Feature
view source
: Objectprivate

Available since: 2.0.0

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); / dependentOL on '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: 2.0.0

Defined By

Static properties

...

Defaults to: []

Available since: 2.0.0

Methods

Defined By

Instance methods

...

Available since: 2.0.0

Returns

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!");
    }
});

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: 2.0.0

Parameters

  • args : Array/Arguments

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

Returns

  • Object

    Returns the result of calling the overridden method

Call the "parent" method of the current method. ...

Call the "parent" method of the current method. That is the method previously overridden by derivation or by an override (see Ext.define).

 Ext.define('My.Base', {
     constructor: function (x) {
         this.x = x;
     },

     statics: {
         method: function (x) {
             return x;
         }
     }
 });

 Ext.define('My.Derived', {
     extend: 'My.Base',

     constructor: function () {
         this.callParent([21]);
     }
 });

 var obj = new My.Derived();

 alert(obj.x);  // alerts 21

This can be used with an override as follows:

 Ext.define('My.DerivedOverride', {
     override: 'My.Derived',

     constructor: function (x) {
         this.callParent([x*2]); // calls original My.Derived constructor
     }
 });

 var obj = new My.Derived();

 alert(obj.x);  // now alerts 42

This also works with static methods.

 Ext.define('My.Derived2', {
     extend: 'My.Base',

     statics: {
         method: function (x) {
             return this.callParent([x*2]); // calls My.Base.method
         }
     }
 });

 alert(My.Base.method(10);     // alerts 10
 alert(My.Derived2.method(10); // alerts 20

Lastly, it also works with overridden static methods.

 Ext.define('My.Derived2Override', {
     override: 'My.Derived2',

     statics: {
         method: function (x) {
             return this.callParent([x*2]); // calls My.Derived2.method
         }
     }
 });

 alert(My.Derived2.method(10); // now alerts 40

Available since: 2.0.0

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 of calling the parent method

...

Available since: 2.0.0

Parameters

...

Available since: 2.0.0

Returns the initial configuration passed to constructor. ...

Returns the initial configuration passed to constructor.

Available since: 2.0.0

Parameters

  • name : String (optional)

    When supplied, value for particular configuration option is returned, otherwise the full config object is returned.

Returns

Ext.env.Feature
view source
( object, name )private
...

Available since: 2.0.0

Parameters

Ext.env.Feature
view source
( tag, createNew )private
...

Available since: 2.0.0

Parameters

...

Available since: 2.0.0

Parameters

( instanceConfig ) : 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);
    }
});

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

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

Available since: 2.0.0

Parameters

Returns

  • Object

    mixins The mixin prototypes as key - value pairs

Fires

    Ext.env.Feature
    view source
    ( name, tag )private
    ...

    Available since: 2.0.0

    Parameters

    Fires

      Ext.env.Feature
      view source
      ( name, tag )private
      ...

      Available since: 2.0.0

      Parameters

      Fires

        ( names, callback, scope )private
        ...

        Available since: 2.0.0

        Parameters

        ( config, applyIfNotSet ) : Ext.Basechainableprivate
        ...

        Available since: 2.0.0

        Parameters

        Returns

        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++;
            },
        
            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: 2.0.0

        Returns

        Defined By

        Static methods

        ( config, fullMerge )privatestatic
        ...

        Available since: 2.0.0

        Parameters

        ( members )chainableprivatestatic
        ...

        Available since: 2.0.0

        Parameters

        ( name, member )chainableprivatestatic
        ...

        Available since: 2.0.0

        Parameters

        ( members )chainablestatic
        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: 2.0.0

        Parameters

        ( 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: 2.0.0

        Parameters

        Returns

        ( xtype )chainableprivatestatic
        ...

        Available since: 2.0.0

        Parameters

        ( fromClass, members ) : Ext.Basechainableprivatestatic
        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: 2.0.0

        Parameters

        • fromClass : Ext.Base

          The class to borrow members from

        • members : Array/String

          The names of the members to borrow

        Returns

        ( args )privatestatic
        ...

        Available since: 2.0.0

        Parameters

        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: 2.0.0

        Returns

        ( 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: 2.0.0

        Parameters

        ( parent )privatestatic
        ...

        Available since: 2.0.0

        Parameters

        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: 2.0.0

        Returns

        ...

        Available since: 2.0.0

        ( name, mixinClass )privatestatic
        Used internally by the mixins pre-processor ...

        Used internally by the mixins pre-processor

        Available since: 2.0.0

        Parameters

        ( fn, scope )chainableprivatestatic
        ...

        Available since: 2.0.0

        Parameters

        ( members ) : Ext.Basechainabledeprecatedstatic
        Override members of this class. ...

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

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

        As of 4.1, direct use of this method is deprecated. Use Ext.define instead:

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

        The above accomplishes the same result but can be managed by the Ext.Loader which can properly order the override and its target class and the build process can determine whether the override is needed based on the required state of the target class (My.Cat).

        Available since: 2.0.0

        This method has been deprecated since 4.1.0

        Please use Ext.define instead

        Parameters

        • members : Object

          The properties to add to this class. This should be specified as an object literal containing one or more properties.

        Returns

        ...

        Available since: 2.0.0