Many classes have shortcut names used when creating (instantiating) a class with a
configuration object. The shortcut name is referred to as an alias (or xtype if the
class extends Ext.Component). The alias/xtype is listed next to the class name of
applicable classes for quick reference.
Framework classes or their members may be specified as private or protected. Else,
the class / member is public. Public, protected, and private are access
descriptors used to convey how and when the class or class member should be used.
Public classes and class members are available for use by any other class or application code and may be relied upon as a stable and persistent within major product versions. Public classes and members may safely be extended via a subclass.
Protected class members are stable public members intended to be used by the
owning class or its subclasses. Protected members may safely be extended via a subclass.
Private classes and class members are used internally by the framework and are not intended to be used by application developers. Private classes and members may change or be omitted from the framework at any time without notice and should not be relied upon in application logic.
static label next to the
method name. *See Static below.Below is an example class member that we can disect to show the syntax of a class member (the lookupComponent method as viewed from the Ext.button.Button class in this case).
Let's look at each part of the member row:
lookupComponent in this example)( item ) in this example)Ext.Component in this case). This may be omitted for methods that do not
return anything other than undefined or may display as multiple possible values
separated by a forward slash / signifying that what is returned may depend on the
results of the method call (i.e. a method may return a Component if a get method calls is
successful or false if unsuccessful which would be displayed as
Ext.Component/Boolean).PROTECTED in
this example - see the Flags section below)Ext.container.Container in this example). The source
class will be displayed as a blue link if the member originates from the current class
and gray if it is inherited from an ancestor or mixed-in class.view source in the example)item : Object in the example).undefined a "Returns" section
will note the type of class or object returned and a description (Ext.Component in the
example)Available since 3.4.0 - not pictured in
the example) just after the member descriptionDefaults to: false)The API documentation uses a number of flags to further commnicate the class member's function and intent. The label may be represented by a text label, an abbreviation, or an icon.
classInstance.method1().method2().etc();false is returned from
an event handler- Indicates a framework class
- A singleton framework class. *See the singleton flag for more information
- A component-type framework class (any class within the Ext JS framework that extends Ext.Component)
- Indicates that the class, member, or guide is new in the currently viewed version
- Indicates a class member of type config
- Indicates a class member of type property
- Indicates a class member of type
method
- Indicates a class member of type event
- Indicates a class member of type
theme variable
- Indicates a class member of type
theme mixin
- Indicates that the class, member, or guide is new in the currently viewed version
Just below the class name on an API doc page is a row of buttons corresponding to the types of members owned by the current class. Each button shows a count of members by type (this count is updated as filters are applied). Clicking the button will navigate you to that member section. Hovering over the member-type button will reveal a popup menu of all members of that type for quick navigation.
Getting and setter methods that correlate to a class config option will show up in the methods section as well as in the configs section of both the API doc and the member-type menus just beneath the config they work with. The getter and setter method documentation will be found in the config row for easy reference.
Your page history is kept in localstorage and displayed (using the available real estate) just below the top title bar. By default, the only search results shown are the pages matching the product / version you're currently viewing. You can expand what is displayed by clicking on the button on the right-hand side of the history bar and choosing the "All" radio option. This will show all recent pages in the history bar for all products / versions.
Within the history config menu you will also see a listing of your recent page visits. The results are filtered by the "Current Product / Version" and "All" radio options. Clicking on the button will clear the history bar as well as the history kept in local storage.
If "All" is selected in the history config menu the checkbox option for "Show product details in the history bar" will be enabled. When checked, the product/version for each historic page will show alongside the page name in the history bar. Hovering the cursor over the page names in the history bar will also show the product/version as a tooltip.
Both API docs and guides can be searched for using the search field at the top of the page.
On API doc pages there is also a filter input field that filters the member rows using the filter string. In addition to filtering by string you can filter the class members by access level, inheritance, and read only. This is done using the checkboxes at the top of the page.
The checkbox at the bottom of the API class navigation tree filters the class list to include or exclude private classes.
Clicking on an empty search field will show your last 10 searches for quick navigation.
Each API doc page (with the exception of Javascript primitives pages) has a menu view of metadata relating to that class. This metadata view will have one or more of the following:
Ext.button.Button class has an alternate class name of Ext.Button). Alternate class
names are commonly maintained for backward compatibility.Runnable examples (Fiddles) are expanded on a page by default. You can collapse and expand example code blocks individually using the arrow on the top-left of the code block. You can also toggle the collapse state of all examples using the toggle button on the top-right of the page. The toggle-all state will be remembered between page loads.
Class members are collapsed on a page by default. You can expand and collapse members using the arrow icon on the left of the member row or globally using the expand / collapse all toggle button top-right.
Viewing the docs on narrower screens or browsers will result in a view optimized for a smaller form factor. The primary differences between the desktop and "mobile" view are:
The class source can be viewed by clicking on the class name at the top of an API doc page. The source for class members can be viewed by clicking on the "view source" link on the right-hand side of the member row.
Ext.Mixin
Ext.mixin.Bindable
Ext.mixin.Identifiable
Ext.mixin.Inheritable
Ext.mixin.Observable
A Widget-based implementation of a slider.
Setting this config option adds or removes data bindings for other configs.
For example, to bind the title config:
var panel = Ext.create({
xtype: 'panel',
bind: {
title: 'Hello {user.name}'
}
});
To dynamically add bindings:
panel.setBind({
title: 'Greetings {user.name}!'
});
To remove bindings:
panel.setBind({
title: null
});
The bind expressions are presented to Ext.app.ViewModel#bind. The
ViewModel instance is determined by lookupViewModel.
Note: If bind is passed as a string, it will use the Ext.Component#property-defaultBindProperty for the binding
Defaults to:
null
The event name to bubble, or an Array of event names.
Defaults to:
null
Determines whether or not clicking on the Slider axis will change the slider.
Defaults to:
true
A string alias, a configuration object or an instance of a ViewController for
this container. Sample usage:
Ext.define('MyApp.UserController', {
alias: 'controller.user'
});
Ext.define('UserContainer', {
extend: 'Ext.container.container',
controller: 'user'
});
// Or
Ext.define('UserContainer', {
extend: 'Ext.container.container',
controller: {
type: 'user',
someConfig: true
}
});
// Can also instance at runtime
var ctrl = new MyApp.UserController();
var view = new UserContainer({
controller: ctrl
});
Defaults to:
null
Sets the value of controller
controller : String / Object / Ext.app.ViewController
If true, this component will be the default scope (this pointer) for events
specified with string names so that the scope can be dynamically resolved. The
component will automatically become the defaultListenerScope if a
controller is specified.
See the introductory docs for Ext.container.Container for some sample usages.
NOTE: This value can only be reliably set at construction time. Setting it after that time may not correctly rewire all of the potentially effected listeners.
Defaults to:
false
Sets the value of defaultListenerScope
defaultListenerScope : Boolean
Config options defined within eventedConfig will auto-generate the setter /
getter methods (see config for more information on
auto-generated getter / setter methods). Additionally, when an
eventedConfig is set it will also fire a before{cfg}change and {cfg}change
event when the value of the eventedConfig is changed from its originally
defined value.
Note: When creating a custom class you'll need to extend Ext.Evented
Example custom class:
Ext.define('MyApp.util.Test', {
extend: 'Ext.Evented',
eventedConfig: {
foo: null
}
});
In this example, the foo config will initially be null. Changing it via
setFoo will fire the beforefoochange event. The call to the setter can be
halted by returning false from a listener on the before event.
var test = Ext.create('MyApp.util.Test', {
listeners: {
beforefoochange: function (instance, newValue, oldValue) {
return newValue !== 'bar';
},
foochange: function (instance, newValue, oldValue) {
console.log('foo changed to:', newValue);
}
}
});
test.setFoo('bar');
The before event handler can be used to validate changes to foo.
Returning false will prevent the setter from changing the value of the
config. In the previous example the beforefoochange handler returns false
so foo will not be updated and foochange will not be fired.
test.setFoo('baz');
Setting foo to 'baz' will not be prevented by the before handler. Foo
will be set to the value: 'baz' and the foochange event will be fired.
The height of this Component; must be a valid CSS length value, e.g: 300, 100px, 30%, etc.
By default, if this is not explicitly set, this Component's element will simply have its own natural size.
If set to auto, it will set the width to null meaning it will have its own natural size.
Defaults to:
null
A config object containing one or more event handlers to be added to this object during initialization. This
should be a valid listeners config object as specified in the addListener example for attaching
multiple handlers at once.
See the Event guide for more
Note: It is bad practice to specify a listener's config when you are defining a class using Ext.define().
Instead, only specify listeners when you are instantiating your class with Ext.create().
Defaults to:
null
One or more names of config properties that this component should publish to
its ViewModel. Some components override this and publish their most useful
configs by default.
This config uses the cfg-reference to determine the name of the data
object to place in the ViewModel. If reference is not set then this config
is ignored.
By using this config and cfg-reference you can bind configs between
components. For example:
...
items: [{
xtype: 'textfield',
reference: 'somefield', // component's name in the ViewModel
publishes: 'value' // value is not published by default
},{
...
},{
xtype: 'displayfield',
bind: 'You have entered "{somefield.value}"'
}]
...
Classes must provide this config as an Object:
Ext.define('App.foo.Bar', {
publishes: {
foo: true,
bar: true
}
});
This is required for the config system to properly merge values from derived classes.
For instances this value can be specified as a value as show above or an array or object as follows:
{
xtype: 'textfield',
reference: 'somefield',
publishes: [
'value',
'rawValue',
'dirty'
]
}
// This achieves the same result as the above array form.
{
xtype: 'textfield',
reference: 'somefield',
publishes: {
value: true,
rawValue: true,
dirty: true
}
}
Defaults to:
null
Available since: 5.0.0
This controls when the value of the slider is published to the ViewModel. By
default this is done only when the thumb is released (the change is complete). To
cause this to happen on every change of the thumb position, specify false. This
setting is true by default for improved performance on slower devices (such as
older browsers or tablets).
Defaults to:
true
Sets the value of publishOnComplete
publishOnComplete : Boolean
Specifies a name for this component inside its component hierarchy. This name must be unique within its view or its Ext.app.ViewController. See the documentation in Ext.container.Container for more information about references.
Note: Valid identifiers start with a letter or underscore and are followed by zero or more additional letters, underscores or digits. References are case sensitive.
Defaults to:
null
If provided this creates a new Session instance for this component. If this
is a Container, this will then be inherited by all child components.
To create a new session you can specify true:
Ext.create({
xtype: 'viewport',
session: true,
items: [{
...
}]
});
Alternatively, a config object can be provided:
Ext.create({
xtype: 'viewport',
session: {
...
},
items: [{
...
}]
});
Defaults to:
null
Sets the value of session
session : Boolean / Object / Ext.data.Session
This object is a map of config property names holding a true if changes to
that config should written back to its binding. Most commonly this is used to
indicate that the value config should be monitored and changes written back
to the bound value.
Defaults to:
{
value: 1
}
Sets the value of twoWayBindable
twoWayBindable : Object
The ViewModel is a data provider for this component and its children. The
data contained in the ViewModel is typically used by adding bind configs
to the components that want present or edit this data.
When set, the ViewModel is created and links to any inherited viewModel
instance from an ancestor container as the "parent". The ViewModel hierarchy,
once established, only supports creation or destruction of children. The
parent of a ViewModel cannot be changed on the fly.
If this is a root-level ViewModel, the data model connection is made to this
component's associated Ext.data.Session. This is
determined by calling getInheritedSession.
Defaults to:
null
Sets the value of viewModel
viewModel : String / Object / Ext.app.ViewModel
The width of this Component; must be a valid CSS length value, e.g: 300, 100px, 30%, etc.
By default, if this is not explicitly set, this Component's element will simply have its own natural size.
If set to auto, it will set the width to null meaning it will have its own natural size.
Defaults to:
null
The value true causes config values to be stored on instances using a
property name prefixed with an underscore ("_") character. A value of false
stores config values as properties using their exact name (no prefix).
Defaults to:
false
Available since: 5.0.0
The value true instructs the initConfig method to only honor values for
properties declared in the config block of a class. When false, properties
that are not declared in a config block will be placed on the instance.
Defaults to:
true
Available since: 5.0.0
This property is used to determine the property of a bind config that is just
the value. For example, if defaultBindProperty="value", then this shorthand
bind config:
bind: '{name}'
Is equivalent to this object form:
bind: {
value: '{name}'
}
The defaultBindProperty is set to "value" for form fields and to "store" for
grids and trees.
Defaults to:
null
A configuration object for Ext.Element.create() that is used to create the Element template. Supports all the standard options of a Ext.Element.create() config and adds 2 additional options:
reference - this option specifies a name for Element references. These
references names become properties of the Widget instance and refer to Ext.Element
instances that were created using the template:
element: {
reference: 'element',
children: [{
reference: 'innerElement'
}]
}
After construction of a widget the reference elements are accessible as follows:
var foo = new FooWidget(),
innerEl = foo.innerEl; // an Ext.Element that wraps the innerElement
The reference attribute is optional, but all Widgets must have a 'element'
reference on some element within the template (usually the outermost one).
listeners - a standard listeners object as specified by Ext.mixin.Observable.
element: {
reference: 'element',
listeners: {
click: 'onClick'
},
children: [{
reference: 'innerElement',
listeners: {
click: 'onInnerClick'
}
}]
}
Since listeners cannot be attached without an Ext.Element reference the reference
property MUST be specified in order to use listeners.
The Widget instance is used as the scope for all listeners specified in this way,
so it is invalid to use the scope option in the listeners config since it will
always be overwritten using this.
Defaults to:
{
reference: 'element'
}
This object holds a key for any event that has a listener. The listener may be set directly on the instance, or on its class or a super class or on the Ext.app.EventBus. The values of this object are truthy (a non-zero number) and falsy (0 or undefined). They do not represent an exact count of listeners. The value for an event is truthy if the event must be fired and is falsy if there is no need to fire the event.
The intended use of this property is to avoid the expense of fireEvent calls when there are no listeners. This can be particularly helpful when one would otherwise have to call fireEvent hundreds or thousands of times. It is used like this:
if (this.hasListeners.foo) {
this.fireEvent('foo', this, arg1);
}
This property is set to true during the call to initConfig.
Defaults to:
false
Available since: 5.0.0
This property is set to true if this instance is the first of its class.
Defaults to:
false
Available since: 5.0.0
This value is true and is used to identify plain objects from instances of
a defined class.
Defaults to:
true
Get the reference to the current class from which this object was instantiated. Unlike Ext.Base#statics,
this.self is scope-dependent and it's meant to be used for dynamic inheritance. See Ext.Base#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'
},
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'
Defaults to:
Base
An array of child elements to use as the children of the main element in the element template. Only used if "children" are not specified explicitly in the element template.
Defaults to:
[]
Regular expression used for validating reference values.
Defaults to:
/^[a-z_][a-z0-9_]*$/i
Appends an after-event handler.
Same as addListener with order set to 'after'.
eventName : String/String[]/Object
The name of the event to listen for.
fn : Function/String
The method the event invokes.
scope : Object (optional)
The scope for fn.
options : Object (optional)
An object containing handler configuration.
Appends a before-event handler. Returning false from the handler will stop the event.
Same as addListener with order set to 'before'.
eventName : String/String[]/Object
The name of the event to listen for.
fn : Function/String
The method the event invokes.
scope : Object (optional)
The scope for fn.
options : Object (optional)
An object containing handler configuration.
Ensures that the given property (if it is a Config System config) has a proper "updater" method on this instance to sync changes to the config.
Available since: 5.0.0
property : String
The name of the config property.
This method applies a versioned, deprecation declaration to this class. This
is typically called by the deprecated config.
deprecations : Object
Adds an element reference to this Widget instance.
name : String
The name of the reference
domNode : HTMLElement
Reduces instantiation time for a Widget by lazily instantiating Ext.Element references the first time they are used. This optimization only works for elements with no listeners specified.
name : String
The name of the reference
domNode : HTMLElement
Adds the specified events to the list of events which this Observable may fire.
eventNames : Object/String...
Either an object with event names as properties with a value of true
or the first event name string if multiple event names are being passed as separate parameters.
Deprecated since version 2.0
It's no longer needed to add events before firing.
Appends an event handler to this object. You can review the available handlers by looking at the 'events' section of the documentation for the component you are working with.
Using the options argument, it is possible to combine different types of listeners:
A delayed, one-time listener:
container.addListener('tap', this.handleTap, this, {
single: true,
delay: 100
});
The method also allows for a single argument to be passed which is a config object containing properties which specify multiple events. For example:
container.addListener({
tap : this.onTap,
swipe: this.onSwipe,
scope: this // Important. Ensure "this" is correct during handler execution
});
One can also specify options for each event handler separately:
container.addListener({
tap : { fn: this.onTap, scope: this, single: true },
swipe: { fn: button.onSwipe, scope: button }
});
See the Events Guide for more.
eventName : String/String[]/Object
The name of the event to listen for. May also be an object who's property names are event names.
fn : Function/String
The method the event invokes. Will be called with arguments given to
fireEvent plus the options parameter described below.
scope : Object (optional)
The scope (this reference) in which the handler function is executed. If
omitted, defaults to the object which fired the event.
options : Object (optional)
An object containing handler configuration.
This object may contain any of the following properties:
scope : Object (optional)
The scope (this reference) in which the handler function is executed. If omitted, defaults to the object
which fired the event.
delay : Number (optional)
The number of milliseconds to delay the invocation of the handler after the event fires.
single : Boolean (optional)
true to add a handler to handle just the next firing of the event, and then remove itself.
order : String (optional)
The order of when the listener should be added into the listener queue.
If you set an order of before and the event you are listening to is preventable, you can return false and it will stop the event.
Available options are before, current and after.
Defaults to:
current
buffer : Number (optional)
Causes the handler to be delayed by the specified number of milliseconds. If the event fires again within that time, the original handler is not invoked, but the new handler is scheduled in its place.
element : String (optional)
If this observable is a Component, allows you to add a listener onto a element of the component using the element's reference.
Ext.create('Ext.Component', {
listeners: {
element: 'element',
tap: function() {
alert('element tap!');
}
}
});
In Sencha Touch, All components have the element reference, which is the outer
most element of the component. Ext.Container also has the innerElement
element which contains all children. In most cases element is adequate.
delegate : String (optional)
For Ext.dom.Element, a simple DOM selector to filter the target or look for a descendant of the target.
Sencha Touch Components can use Ext.ComponentQuery selectors to filter child Components.
// Create a container with a two children; a button and a toolbar
var container = Ext.create('Ext.Container', {
items: [
{
xtype: 'toolbar',
docked: 'top',
title: 'My Toolbar'
},
{
xtype: 'button',
text: 'My Button'
}
]
});
container.addListener({
// Ext.Buttons have an xtype of 'button', so we use that are a selector for our delegate
delegate: 'button',
tap: function() {
alert('Button tapped!');
}
});
capture : Boolean
true to initiate capture which will fire the
listeners on the target Element before any descendant Elements. Normal events
start with the target element and propagate upward to ancestor elements, whereas
captured events propagate from the top of the DOM downward to descendant elements.
This option achieves the same result as the useCapture parameter in the standard
JavaScript addEventListener method.
order : String (optional)
The order of when the listener should be added into the listener queue.
Possible values are before, current and after.
Defaults to: 'current'
Adds listeners to any Observable object (or Element) which are automatically removed when this Component is destroyed.
object : Ext.mixin.Observable/HTMLElement
The item to which to add a listener/listeners.
eventName : Object/String
The event name, or an object containing event name properties.
fn : Function (optional)
If the eventName parameter was an event name, this is the handler function.
scope : Object (optional)
If the eventName parameter was an event name, this is the scope in which
the handler function is executed.
options : Object (optional)
If the eventName parameter was an event name, this is the
addListener options.
Deprecated since version 2.0
All listeners are now automatically managed where necessary. Simply use addListener.
Available since: 5.0.0
binds : String/Object
currentBindings : Object
Transforms a Session config to a proper instance.
Available since: 5.0.0
session : Object
Transforms a ViewModel config to a proper instance.
Available since: 5.0.0
viewModel : String/Object/Ext.app.ViewModel
Given a value within this Slider's range, calculates a Thumb's percentage CSS position to map that value.
v : Object
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
To override a method and replace it and also call the superclass method, use callSuper. This is often done to patch a method to fix a bug.
args : Array/Arguments
The arguments, either an array or the arguments object
from the current method, for example: this.callParent(arguments)
Returns the result of calling the parent method
This method is used by an override to call the superclass method but bypass any overridden method. This is often done to "patch" a method that contains a bug but for whatever reason cannot be fixed directly.
Consider:
Ext.define('Ext.some.Class', {
method: function () {
console.log('Good');
}
});
Ext.define('Ext.some.DerivedClass', {
extend: 'Ext.some.Class',
method: function () {
console.log('Bad');
// ... logic but with a bug ...
this.callParent();
}
});
To patch the bug in Ext.some.DerivedClass.method, the typical solution is to create an
override:
Ext.define('App.patches.DerivedClass', {
override: 'Ext.some.DerivedClass',
method: function () {
console.log('Fixed');
// ... logic but with bug fixed ...
this.callSuper();
}
});
The patch method cannot use callParent to call the superclass method since
that would call the overridden method containing the bug. In other words, the
above patch would only produce "Fixed" then "Good" in the console log, whereas,
using callParent would produce "Fixed" then "Bad" then "Good".
args : Array/Arguments
The arguments, either an array or the arguments object
from the current method, for example: this.callSuper(arguments)
Returns the result of calling the superclass method
actionFn : Object
eventName : Object
fn : Object
scope : Object
options : Object
order : Object
Creates an event handling function which re-fires the event from this object as the passed event name.
newName : String
This method is called to cleanup an object and its resources. After calling this method, the object should not be used any further.
name : Object
fn : Object
scope : Object
options : Object
order : Object
Enables events fired by this Observable to bubble up an owner hierarchy by calling this.getBubbleTarget() if
present. There is no implementation in the Observable base class.
events : String/String[]
The event name to bubble, or an Array of event names.
Fires the specified event with the passed parameters and execute a function (action)
at the end if there are no listeners that return false.
eventName : String
The name of the event to fire.
args : Array
Arguments to pass to handers.
fn : Function
Action.
scope : Object
Scope of fn.
Fires the specified event with the passed parameters (minus the event name, plus the options object passed
to addListener).
The first argument is the name of the event. Every other argument passed will be available when you listen for the event.
Firstly, we set up a listener for our new event.
this.on('myevent', function(arg1, arg2, arg3, arg4, options, e) {
console.log(arg1); // true
console.log(arg2); // 2
console.log(arg3); // { test: 'foo' }
console.log(arg4); // 14
console.log(options); // the options added when adding the listener
console.log(e); // the event object with information about the event
});
And then we can fire off the event.
this.fireEvent('myevent', true, 2, { test: 'foo' }, 14);
An event may be set to bubble up an Observable parent hierarchy by calling enableBubble.
eventName : String
The name of the event to fire.
args : Object...
Variable number of parameters are passed to handlers.
Returns false if any of the handlers return false.
Fires the specified event with the passed parameter list.
An event may be set to bubble up an Observable parent hierarchy (See Ext.Component#getBubbleTarget) by calling enableBubble.
eventName : String
The name of the event to fire.
args : Object[]
An array of parameters which are passed to handlers.
returns false if any of the handlers return false otherwise it returns true.
Returns a specified config property value. If the name parameter is not passed, all current configuration options will be returned as key value pairs.
name : String (optional)
The name of the config property to get.
peek : Boolean (optional)
true to peek at the raw value without calling the getter.
Defaults to: false
The config property value.
A template method for modifying the element config before it is processed.
By default adds the result of this.getTemplate() as the children array of element if children were not specified in the original element config.
Typically this method should not need to be implemented in subclasses. Instead the
element property should be use to configure the element template for a
given Widget subclass.
the element config object
Retrieves the id of this component. Will autogenerate an id if one has not already been set.
id
This method returns an object containing the inherited properties for this instance.
Available since: 5.0.0
inner : Boolean (optional)
Pass true to return inheritedStateInner instead
of the normal inheritedState object. This is only needed internally and should
not be passed by user code.
Defaults to: false
The inheritedState object containing inherited properties.
This method returns the value of a config property that may be inherited from some ancestor.
In some cases, a config may be explicitly set on a component with the intent of
only being presented to its children while that component should act upon the
inherited value (see referenceHolder for example). In these cases the skipThis
parameter should be specified as true.
Available since: 5.0.0
property : String
The name of the config property to return.
skipThis : Boolean (optional)
Pass true if the property should be ignored if
found on this instance. In other words, true means the property must be inherited
and not explicitly set on this instance.
Defaults to: false
The value of the requested property.
Returns the initial configuration passed to constructor when instantiating this class.
name : String (optional)
Name of the config option to return.
The full config object or a single config value
when name parameter specified.
Returns the nearest thumb to a click event, along with its distance
trackPoint : Number
local pixel position along the Slider's axis to find the Thumb for
The closest thumb object and its distance from the click event
Returns the ratio of pixels to mapped values. e.g. if the slider is 200px wide and maxValue - minValue is 100, the ratio is 2
The ratio of pixels to mapped values
Used by Ext.ComponentQuery, and the up method to find the owning Component in the linkage hierarchy.
By default this returns the Container which contains this Component.
This may be overridden by Component authors who implement ownership hierarchies which are not based upon ownerCt, such as BoundLists being owned by Fields or Menus being owned by Buttons.
Given an [x, y] position within the slider's track (Points outside the slider's track are coerced to either the minimum or maximum value),
calculate how many pixels from the slider origin (left for horizontal Sliders and bottom for vertical Sliders) that point is.
If the point is outside the range of the Slider's track, the return value is undefined
xy : Number[]
The point to calculate the track point for
Returns the current value of the slider
index : Number
The index of the thumb to return a value for
The current value of the slider at the given index, or an array of all thumb values if no index is given.
Returns an array of values - one for the location of each thumb
The set of thumb values
Checks to see if this object has any listeners for a specified event
eventName : String
The name of the event to check for
True if the event is being listened for, else false
This method triggers the lazy configs and must be called when it is time to
fully boot up. The configs that must be initialized are: bind, publishes,
session, twoWayBindable and viewModel.
Available since: 5.0.0
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'
instanceConfig : Object
this
Initializes the Element for this Widget instance. If this is the first time a Widget of this type has been instantiated the element config will be processed to create an Element. This Element is then cached on the prototype (see afterCachedConfig) so that future instances can obtain their element by simply cloning the Element that was cached by the first instance.
called for the first instance of this Widget to create an object that contains the listener configs for all of the element references keyed by reference name. The object is cached on the prototype and has the following shape:
_elementListeners: {
element: {
click: 'onClick'
scope: this
},
fooReference: {
tap: {
fn: someFunction
delay: 100
}
}
}
elementConfig : Object
This method is called to initialize the inheritedState objects for this instance.
This amounts to typically copying certain properties from the instance to the given
object.
Available since: 5.0.0
inheritedState : Object
The state object for this instance.
inheritedStateInner : Object (optional)
This object is only provided for containers.
This method marks the current inherited state as invalid. The next time a call is
made to getInherited the objects will be recreated and initialized.
Available since: 5.0.0
Tests whether this Widget matches a Ext.ComponentQuery selector string.
selector : String
The selector string to test against.
true if this Widget matches the selector.
Checks if all events, or a specific event, is suspended.
eventName : String (optional)
The name of the specific event to check
true if events are suspended
Tests whether or not this Component is of a specific xtype. This can test whether this Component is descended
from the xtype (default) or whether it is directly of the xtype specified (shallow = true).
**If using your own subclasses, be aware that a Component must register its own xtype
to participate in determination of inherited xtypes.__
For a list of all available xtypes, see the Ext.Component header.
Example usage:
var t = new Ext.field.Text();
var isText = t.isXType('textfield'); // true
var isBoxSubclass = t.isXType('field'); // true, descended from Ext.field.Field
var isBoxInstance = t.isXType('field', true); // false, not a direct Ext.field.Field instance
xtype : String
The xtype to check for this Component.
shallow : Boolean (optional)
false to check whether this Component is descended from the xtype (this is
the default), or true to check whether this Component is directly of the specified xtype.
true if this component descends from the specified xtype, false otherwise.
Adds a "destroyable" object to an internal list of objects that will be destroyed
when this instance is destroyed (via destroy).
name : String
value : Object
The value passed.
Gets the controller that controls this view. May be a controller that belongs to a view higher in the hierarchy.
Available since: 5.0.1
skipThis : Boolean (optional)
true to not consider the controller directly attached
to this view (if it exists).
Defaults to: false
The controller. null if no controller is found.
Gets the Controller or Component that is used as the reference holder for this view.
Available since: 5.0.0
skipThis : Boolean (optional)
false to return this as the reference holder if
this instance has set referenceHolder. Unlike getInheritedConfig this method
defaults to true because it is possible that a reference property set by the
owner of a component that is also a referenceHolder itself. In this case, the
reference connects not to this component but to the parent referenceHolder.
Defaults to: true
The reference holder.
Returns the Ext.data.Session for this instance. This property may come
from this instance's session or be inherited from this object's parent.
Available since: 5.0.0
skipThis : Boolean (optional)
Pass true to ignore a session configured on
this instance and only consider an inherited session.
Defaults to: false
Returns the Ext.app.ViewModel for this instance. This property may come from this
this instance's viewModel or be inherited from this object's parent.
Available since: 5.0.0
skipThis : Boolean (optional)
Pass true to ignore a viewModel configured on
this instance and only consider an inherited view model.
Defaults to: false
Returns an update method for the given Config that will call publishState
to ensure two-way bindings (via bind) as well as any publishes are updated.
This method is cached on the cfg instance for re-use.
Available since: 5.0.0
cfg : Ext.Config
The updater function.
Alias for addManagedListener. Adds listeners to any Observable object (or Element) which are automatically removed when this Component is destroyed.
object : Ext.mixin.Observable/HTMLElement
The item to which to add a listener/listeners.
eventName : Object/String
The event name, or an object containing event name properties.
fn : Function (optional)
If the eventName parameter was an event name, this is the handler function.
scope : Object (optional)
If the eventName parameter was an event name, this is the scope in which
the handler function is executed.
options : Object (optional)
If the eventName parameter was an event name, this is the
addListener options.
Deprecated since version 2.0.0
This is now done automatically
move the thumb
thumb : Object
v : Object
animate : Object
Alias for removeManagedListener. Adds listeners to any Observable object (or Element) which are automatically removed when this Component is destroyed.
object : Ext.mixin.Observable/HTMLElement
The item to which to add a listener/listeners.
eventName : Object/String
The event name, or an object containing event name properties.
fn : Function (optional)
If the eventName parameter was an event name, this is the handler function.
scope : Object (optional)
If the eventName parameter was an event name, this is the scope in which
the handler function is executed.
Deprecated since version 2.0.0
This is now done automatically
Returns a snapped, constrained value when given a desired value
value : Number
Raw number value
The raw value rounded to the correct d.p. and constrained within the set max and min values
Alias for addListener. Appends an event handler to this object. You can review the available handlers by looking at the 'events' section of the documentation for the component you are working with.
Using the options argument, it is possible to combine different types of listeners:
A delayed, one-time listener:
container.addListener('tap', this.handleTap, this, {
single: true,
delay: 100
});
The method also allows for a single argument to be passed which is a config object containing properties which specify multiple events. For example:
container.addListener({
tap : this.onTap,
swipe: this.onSwipe,
scope: this // Important. Ensure "this" is correct during handler execution
});
One can also specify options for each event handler separately:
container.addListener({
tap : { fn: this.onTap, scope: this, single: true },
swipe: { fn: button.onSwipe, scope: button }
});
See the Events Guide for more.
eventName : String/String[]/Object
The name of the event to listen for. May also be an object who's property names are event names.
fn : Function/String
The method the event invokes. Will be called with arguments given to
fireEvent plus the options parameter described below.
scope : Object (optional)
The scope (this reference) in which the handler function is executed. If
omitted, defaults to the object which fired the event.
options : Object (optional)
An object containing handler configuration.
This object may contain any of the following properties:
scope : Object (optional)
The scope (this reference) in which the handler function is executed. If omitted, defaults to the object
which fired the event.
delay : Number (optional)
The number of milliseconds to delay the invocation of the handler after the event fires.
single : Boolean (optional)
true to add a handler to handle just the next firing of the event, and then remove itself.
order : String (optional)
The order of when the listener should be added into the listener queue.
If you set an order of before and the event you are listening to is preventable, you can return false and it will stop the event.
Available options are before, current and after.
Defaults to:
current
buffer : Number (optional)
Causes the handler to be delayed by the specified number of milliseconds. If the event fires again within that time, the original handler is not invoked, but the new handler is scheduled in its place.
element : String (optional)
If this observable is a Component, allows you to add a listener onto a element of the component using the element's reference.
Ext.create('Ext.Component', {
listeners: {
element: 'element',
tap: function() {
alert('element tap!');
}
}
});
In Sencha Touch, All components have the element reference, which is the outer
most element of the component. Ext.Container also has the innerElement
element which contains all children. In most cases element is adequate.
delegate : String (optional)
For Ext.dom.Element, a simple DOM selector to filter the target or look for a descendant of the target.
Sencha Touch Components can use Ext.ComponentQuery selectors to filter child Components.
// Create a container with a two children; a button and a toolbar
var container = Ext.create('Ext.Container', {
items: [
{
xtype: 'toolbar',
docked: 'top',
title: 'My Toolbar'
},
{
xtype: 'button',
text: 'My Button'
}
]
});
container.addListener({
// Ext.Buttons have an xtype of 'button', so we use that are a selector for our delegate
delegate: 'button',
tap: function() {
alert('Button tapped!');
}
});
capture : Boolean
true to initiate capture which will fire the
listeners on the target Element before any descendant Elements. Normal events
start with the target element and propagate upward to ancestor elements, whereas
captured events propagate from the top of the DOM downward to descendant elements.
This option achieves the same result as the useCapture parameter in the standard
JavaScript addEventListener method.
order : String (optional)
The order of when the listener should be added into the listener queue.
Possible values are before, current and after.
Defaults to: 'current'
Alias for addAfterListener. Appends an after-event handler.
Same as addListener with order set to 'after'.
eventName : String/String[]/Object
The name of the event to listen for.
fn : Function/String
The method the event invokes.
scope : Object (optional)
The scope for fn.
options : Object (optional)
An object containing handler configuration.
Alias for addBeforeListener.
Appends a before-event handler. Returning false from the handler will stop the event.
Same as addListener with order set to 'before'.
eventName : String/String[]/Object
The name of the event to listen for.
fn : Function/String
The method the event invokes.
scope : Object (optional)
The scope for fn.
options : Object (optional)
An object containing handler configuration.
Moves the thumb to the indicated position. Only changes the value if the click was within this.clickRange.
trackPoint : Number
local pixel offset from the origin (left for horizontal and bottom for vertical) along the Slider's axis at which the click event occured.
Moves the given thumb above all other by increasing its z-index. This is called when as drag any thumb, so that the thumb that was just dragged is always at the highest z-index. This is required when the thumbs are stacked on top of each other at one of the ends of the slider's range, which can result in the user not being able to move any of them.
topThumb : Ext.slider.Thumb
The thumb to move to the top
Publish this components state to the ViewModel. If no arguments are given (or if
this is the first call), the entire state is published. This state is determined by
the publishes property.
This method is called only by component authors.
Available since: 5.0.0
property : String (optional)
The name of the property to update.
value : Object (optional)
The value of property. Only needed if property is given.
args : Object
fn : Object
scope : Object
options : Object
order : Object
Relays selected events from the specified Observable as if the events were fired by this.
object : Object
The Observable whose events this object is to relay.
events : String/Array/Object
Array of event names to relay.
Removes a before-event handler.
Same as removeListener with order set to 'after'.
eventName : String/String[]/Object
The name of the event the handler was associated with.
fn : Function/String
The handler to remove.
scope : Object (optional)
The scope originally specified for fn.
options : Object (optional)
Extra options object.
Removes a before-event handler.
Same as removeListener with order set to 'before'.
eventName : String/String[]/Object
The name of the event the handler was associated with.
fn : Function/String
The handler to remove.
scope : Object (optional)
The scope originally specified for fn.
options : Object (optional)
Extra options object.
Removes an event handler.
eventName : String/String[]/Object
The type of event the handler was associated with.
fn : Function/String
The handler to remove. This must be a reference to the function passed into the addListener call.
scope : Object (optional)
The scope originally specified for the handler. It must be the same as the scope argument specified in the original call to addListener or the listener will not be removed.
options : Object (optional)
Extra options object. See addListener for details.
order : String (optional)
The order of the listener to remove.
Possible values are before, current and after.
Defaults to: 'current'
Adds listeners to any Observable object (or Element) which are automatically removed when this Component is destroyed.
object : Ext.mixin.Observable/HTMLElement
The item to which to add a listener/listeners.
eventName : Object/String
The event name, or an object containing event name properties.
fn : Function (optional)
If the eventName parameter was an event name, this is the handler function.
scope : Object (optional)
If the eventName parameter was an event name, this is the scope in which
the handler function is executed.
Deprecated since version 2.0
All listeners are now automatically managed where necessary. Simply use removeListener.
This method determines the scope (the this pointer) of named listeners that have
not be given a specific scope. For example:
component.on({
click: 'onClick'
});
The default implementation of this method returns this object. Components and other observable objects that have natural hierarchies can override this method to pick the desired scope using other means.
Available since: 5.0.0
defaultScope : Object (optional)
The default scope to return if none is found.
Defaults to: this
The object on which non-scoped, named listeners should be fired.
Resumes firing of the named event(s).
After calling this method to resume events, the events will fire when requested to fire.
Note that if the suspendEvent method is called multiple times for a certain event, this converse method will have to be called the same number of times for it to resume firing.
eventName : String...
Multiple event names to resume.
Resumes firing events (see suspendEvents).
discardQueuedEvents : Boolean
Pass as true to discard any queued events.
Given a Thumb's percentage position along the slider, returns the mapped slider value for that pixel. E.g. if we have a slider 200px wide with minValue = 100 and maxValue = 500, reversePercentageValue(25) returns 200
pos : Number
The percentage along the slider track to return a mapped value for
The mapped value for the given position
Given a pixel location along the slider, returns the mapped slider value for that pixel. E.g. if we have a slider 200px wide with minValue = 100 and maxValue = 500, reversePixelValue(50) returns 200
pos : Number
The position along the slider to return a mapped value for
The mapped value for the given position
Sets a single/multiple configuration options.
name : String/Object
The name of the property to set, or a set of key value pairs to set.
value : Object (optional)
The value to set for the name parameter.
this
Sets the size of the Component.
width : Number
The new width for the Component.
height : Number
The new height for the Component.
Programmatically sets the value of the Slider. Ensures that the value is constrained within the minValue and maxValue.
Setting a single value: // Set the second slider value, don't animate mySlider.setThumbValue(1, 50, false);
Setting multiple values at once // Set 3 thumb values, animate mySlider.setThumbValue([20, 40, 60], true);
index : Number/Number[]
Index of the thumb to move. Alternatively, it can be an array of values to set for each thumb in the slider.
value : Number
The value to set the slider to. (This will be constrained within minValue and maxValue)
animate : Boolean (optional)
Turn on or off animation
Defaults to: true
this
Get the reference to the class from which this object was instantiated. Note that unlike Ext.Base#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
Suspends firing of the named event(s).
After calling this method to suspend events, the events will no longer fire when requested to fire.
Note that if this is called multiple times for a certain event, the converse method resumeEvent will have to be called the same number of times for it to resume firing.
eventName : String...
Multiple event names to suspend.
Suspends the firing of all events. (see resumeEvents)
queueSuspended : Boolean
true to queue up suspended events to be fired
after the resumeEvents call instead of discarding all suspended events.
Alias for removeListener. Removes an event handler.
eventName : String/String[]/Object
The type of event the handler was associated with.
fn : Function/String
The handler to remove. This must be a reference to the function passed into the addListener call.
scope : Object (optional)
The scope originally specified for the handler. It must be the same as the scope argument specified in the original call to addListener or the listener will not be removed.
options : Object (optional)
Extra options object. See addListener for details.
order : String (optional)
The order of the listener to remove.
Possible values are before, current and after.
Defaults to: 'current'
Alias for removeAfterListener. Removes a before-event handler.
Same as removeListener with order set to 'after'.
eventName : String/String[]/Object
The name of the event the handler was associated with.
fn : Function/String
The handler to remove.
scope : Object (optional)
The scope originally specified for fn.
options : Object (optional)
Extra options object.
Alias for removeBeforeListener. Removes a before-event handler.
Same as removeListener with order set to 'before'.
eventName : String/String[]/Object
The name of the event the handler was associated with.
fn : Function/String
The handler to remove.
scope : Object (optional)
The scope originally specified for fn.
options : Object (optional)
Extra options object.
Destroys a given set of linked objects. This is only needed if
the linked object is being destroyed before this instance.
names : String[]
The names of the linked objects to destroy.
this
Updates the session config.
Available since: 5.0.0
session : Ext.data.Session
Updates the viewModel config.
Available since: 5.0.0
viewModel : Ext.app.ViewModel
Adds new config properties to this class. This is called for classes when they are declared, then for any mixins that class may define and finally for any overrides defined that target the class.
config : Object
mixinClass : Class (optional)
The mixin class if the configs are from a mixin.
Add methods / properties to the prototype of this class.
Ext.define('My.awesome.Cat', {
constructor: function() {
...
}
});
My.awesome.Cat.addMembers({
meow: function() {
alert('Meowww...');
}
});
var kitty = new My.awesome.Cat();
kitty.meow();
members : Object
The members to add to this class.
isStatic : Boolean (optional)
Pass true if the members are static.
Defaults to: false
privacy : Boolean (optional)
Pass true if the members are private. This
only has meaning in debug mode and only for methods.
Defaults to: false
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() { ... };
});
members : Object
this
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 '$$$$$$$'
fromClass : Ext.Base
The class to borrow members from
members : Array/String
The names of the members to borrow
this
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.
the created instance.
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()
alias : String/Object
The new method name, or an object to set multiple aliases. See flexSetter
origin : String/Object
The original method name
Returns the Ext.Configurator for this class.
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'
className
Used internally by the mixins pre-processor
name : Object
mixinClass : Object
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!");
this.callParent(arguments);
alert("Meeeeoooowwww");
}
});
var kitty = new My.Cat(); // alerts "I'm going to be a cat!"
// alerts "I'm a cat!"
// alerts "Meeeeoooowwww"
Direct use of this method should be rare. Use Ext.define instead:
Ext.define('My.CatOverride', {
override: 'My.Cat',
constructor: function() {
alert("I'm going to be a cat!");
this.callParent(arguments);
alert("Meeeeoooowwww");
}
});
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).
members : Object
The properties to add to this class. This should be specified as an object literal containing one or more properties.
this class
This event fires when height changes.
sender : Ext.Widget
The instance firing this event.
value : Number/String
The current value of height.
oldValue : Number/String
The previous value of height.
eOpts : Object
The options object passed to Ext.util.Observable.addListener.
Return false to cancel the change.
This event fires when width changes.
sender : Ext.Widget
The instance firing this event.
value : Number/String
The current value of width.
oldValue : Number/String
The previous value of width.
eOpts : Object
The options object passed to Ext.util.Observable.addListener.
Return false to cancel the change.
This event fires when height changes.
sender : Ext.Widget
The instance firing this event.
value : Number/String
The current value of height.
oldValue : Number/String
The previous value of height.
eOpts : Object
The options object passed to Ext.util.Observable.addListener.
This event fires when width changes.
sender : Ext.Widget
The instance firing this event.
value : Number/String
The current value of width.
oldValue : Number/String
The previous value of width.
eOpts : Object
The options object passed to Ext.util.Observable.addListener.
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