Hierarchy
Ext.direct.ProviderExt.direct.JsonProviderExt.direct.RemotingProviderMixins
The RemotingProvider exposes access to server side methods on the client (a remote procedure call (RPC) type of connection where the client can initiate a procedure on the server).
This allows for code to be organized in a fashion that is maintainable, while providing a clear path between client and server, something that is not always apparent when using URLs.
To accomplish this the server-side needs to describe what classes and methods are available on the client-side. This configuration will typically be outputted by the server-side Ext.Direct stack when the API description is built.
Object literal defining the server side actions and methods. For example, if the Provider is configured with:
"actions":{ // each property within the 'actions' object represents a server side Class
"TestAction":[ // array of methods within each server side Class to be
{ // stubbed out on client
"name":"doEcho",
"len":1
},{
"name":"multiply",// name of method
"len":2 // The number of parameters that will be used to create an
// array of data to send to the server side function.
// Ensure the server sends back a Number, not a String.
},{
"name":"doForm",
"formHandler":true, // direct the client to use specialized form handling method
"len":1
}]
}
Note that a Store is not required, a server method can be called at any time. In the following example a client side handler is used to call the server side method "multiply" in the server-side "TestAction" Class:
TestAction.multiply(
2, 4, // pass two arguments to server, so specify len=2
// callback function after the server is called
// result: the result returned by the server
// e: Ext.direct.RemotingEvent object
function(result, e){
var t = e.getTransaction();
var action = t.action; // server side Class called
var method = t.method; // server side method called
if(e.status){
var answer = Ext.encode(result); // 8
}else{
var msg = e.message; // failure message
}
}
);
In the example above, the server side "multiply" function will be passed two arguments (2 and 4). The "multiply" method should return the value 8 which will be available as the result in the example above.
true or false to enable or disable combining of method calls. If a number is specified this is the amount of time in milliseconds to wait before sending a batched request (defaults to 10).
Calls which are received within the specified timeframe will be
concatenated together and sent in a single request, optimizing the application by reducing the amount of round trips that have to be made to the server.
Specify which param will hold the arguments for the method. Defaults to 'data'.
Specify which param will hold the arguments for the method. Defaults to 'data'.
The unique id of the provider (defaults to an auto-assigned id). You should assign an id if you need to be able to access the provider later and you do not have an object reference available, for example:
Ext.direct.Manager.addProvider({
type: 'polling',
url: 'php/poll.php',
id: 'poll-provider'
});
var p = Ext.direct.Manager.getProvider('poll-provider');
p.disconnect();
(optional)
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.
DOM events from ExtJs Components
While some ExtJs Component classes export selected DOM events (e.g. "click", "mouseover" etc), this
is usually only done when extra value can be added. For example the DataView's
click event passing the node clicked on. To access DOM
events directly from a child element of a Component, we need to specify the element option to
identify the Component property to add a DOM listener to:
new Ext.panel.Panel({
width: 400,
height: 200,
dockedItems: [{
xtype: 'toolbar'
}],
listeners: {
click: {
element: 'el', //bind to the underlying el property on the panel
fn: function(){ console.log('click el'); }
},
dblclick: {
element: 'body', //bind to the underlying body property on the panel
fn: function(){ console.log('dblclick body'); }
}
}
});
Number of times to re-attempt delivery on failure of a call. Defaults to 1.
Number of times to re-attempt delivery on failure of a call. Defaults to 1.
Namespace for the Remoting Provider (defaults to the browser global scope of window). Explicitly specify the namespace Object, or specify a String to have a namespace created implicitly.
The timeout to use for each request. Defaults to undefined.
The timeout to use for each request. Defaults to undefined.
Required. The url to connect to the Ext.direct.Manager server-side router.
Required. The url to connect to the Ext.direct.Manager server-side router.
Adds the specified events to the list of events which this Observable may fire.
Adds the specified events to the list of events which this Observable may fire.
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.
[additional] Optional additional event names if multiple event names are being passed as separate parameters. Usage:
this.addEvents('storeloaded', 'storecleared');
Appends an event handler to this object.
Appends an event handler to this object.
The name of the event to listen for. May also be an object who's property names are event names. See
The method the event invokes.
(optional) The scope (this reference) in which the handler function is executed.
If omitted, defaults to the object which fired the event.
(optional) An object containing handler configuration. properties. This may contain any of the following properties:
this reference) in which the handler function is executed.
If omitted, defaults to the object which fired the event.This option is useful during Component construction to add DOM event listeners to elements of Components which will exist only after the Component is rendered. For example, to add a click listener to a Panel's body:
new Ext.panel.Panel({
title: 'The title',
listeners: {
click: this.handlePanelClick,
element: 'body'
}
});
When added in this way, the options available are the options applicable to Ext.core.Element.addListener
Combining Options
Using the options argument, it is possible to combine different types of listeners:
A delayed, one-time listener.
myPanel.on('hide', this.handleClick, this, {
single: true,
delay: 100
});
Attaching multiple handlers in 1 call
The method also allows for a single argument to be passed which is a config object containing properties
which specify multiple events. For example:
myGridPanel.on({
cellClick: this.onCellClick,
mouseover: this.onMouseOver,
mouseout: this.onMouseOut,
scope: this // Important. Ensure "this" is correct during handler execution
});
Adds listeners to any Observable object (or Element) which are automatically removed when this Component is destroyed.
Adds listeners to any Observable object (or Element) which are automatically removed when this Component is destroyed.
The item to which to add a listener/listeners.
The event name, or an object containing event name properties.
Optional. If the ename parameter was an event name, this
is the handler function.
Optional. If the ename parameter was an event name, this
is the scope (this reference) in which the handler function is executed.
Optional. If the ename parameter was an event name, this
is the addListener options.
Starts capture on the specified Observable. All events will be passed to the supplied function with the event name + standard signature of the event before the event is fired. If the supplied function returns false, the event will not fire.
The Observable to capture events from.
The function to call when an event is fired.
(optional) The scope (this reference) in which the function is executed. Defaults to the Observable firing the event.
Removes all listeners for this object including the managed listeners
Removes all listeners for this object including the managed listeners
Removes all managed listeners for this object.
Removes all managed listeners for this object.
Create an event from a response object
Create an event from a response object
The XHR response object
The event
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.
This is commonly used by Ext.Components to bubble events to owner Containers. See Ext.Component.getBubbleTarget. The default implementation in Ext.Component returns the Component's immediate owner. But if a known target is required, this can be overridden to access the required target more quickly.
Example:
Ext.override(Ext.form.field.Base, {
// Add functionality to Field's initComponent to enable the change event to bubble
initComponent : Ext.Function.createSequence(Ext.form.field.Base.prototype.initComponent, function() {
this.enableBubble('change');
}),
// We know that we want Field's events to bubble directly to the FormPanel.
getBubbleTarget : function() {
if (!this.formPanel) {
this.formPanel = this.findParentByType('form');
}
return this.formPanel;
}
});
var myForm = new Ext.formPanel({
title: 'User Details',
items: [{
...
}],
listeners: {
change: function() {
// Title goes red if form has been modified.
myForm.header.setStyle('color', 'red');
}
}
});
The event name to bubble, or an Array of event names.
Fires the specified event with the passed parameters (minus the event name).
An event may be set to bubble up an Observable parent hierarchy (See Ext.Component.getBubbleTarget) by calling enableBubble.
The name of the event to fire.
Variable number of parameters are passed to handlers.
returns false if any of the handlers return false otherwise it returns true.
Checks to see if this object has any listeners for a specified event
Checks to see if this object has any listeners for a specified event
The name of the event to check for
True if the event is being listened for, else false
Returns whether or not the server-side is currently connected. Abstract method for subclasses to implement.
Returns whether or not the server-side is currently connected. Abstract method for subclasses to implement.
Sets observability on the passed class constructor.
This makes any event fired on any instance of the passed class also fire a single event through the class allowing for central handling of events on many instances at once.
Usage:
Ext.util.Observable.observe(Ext.data.Connection);
Ext.data.Connection.on('beforerequest', function(con, options) {
console.log('Ajax request made to ' + options.url);
});
The class constructor to make observable.
An object containing a series of listeners to add. See addListener.
Appends an event handler to this object (shorthand for addListener.)
Appends an event handler to this object (shorthand for addListener.)
The type of event to listen for
The method the event invokes
(optional) The scope (this reference) in which the handler function is executed.
If omitted, defaults to the object which fired the event.
(optional) An object containing handler configuration.
Relays selected events from the specified Observable as if the events were fired by this.
Relays selected events from the specified Observable as if the events were fired by this.
The Observable whose events this object is to relay.
Array of event names to relay.
Removes all added captures from the Observable.
Removes all added captures from the Observable.
The Observable to release
Removes an event handler.
Removes an event handler.
The type of event the handler was associated with.
The handler to remove. This must be a reference to the function passed into the addListener call.
(optional) The scope originally specified for the handler.
Removes listeners that were added by the mon method.
Removes listeners that were added by the mon method.
The item from which to remove a listener/listeners.
The event name, or an object containing event name properties.
Optional. If the ename parameter was an event name, this
is the handler function.
Optional. If the ename parameter was an event name, this
is the scope (this reference) in which the handler function is executed.
Resume firing events. (see suspendEvents)
If events were suspended using the queueSuspended parameter, then all
events fired during event suspension will be sent to any listeners now.
Suspend the firing of all events. (see resumeEvents)
Suspend the firing of all events. (see resumeEvents)
Pass as true to queue up suspended events to be fired after the resumeEvents call instead of discarding all suspended events;
Removes an event handler (shorthand for removeListener.)
Removes an event handler (shorthand for removeListener.)
The type of event the handler was associated with.
The handler to remove. This must be a reference to the function passed into the addListener call.
(optional) The scope originally specified for the handler.
Fires immediately before the client-side sends off the RPC call. By returning false from an event handler you can prevent the call from executing.
The meta data
Fires immediately after the request to the server-side is sent. This does NOT fire after the response has come back from the call.
The meta data
Fires when the Provider connects to the server-side
Fires when the Provider connects to the server-side
The Provider.
Fires when the Provider receives data from the server-side
Fires when the Provider receives data from the server-side
The Provider.
The Ext.Direct.Event type that occurred.
Fires when the Provider disconnects from the server-side
Fires when the Provider disconnects from the server-side
The Provider.