Invoke
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 and inheritance. This is done using the checkboxes at the top of
the page. Note that filtering out private members also filters the API class
navigation tree.
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.
Sencha Web Application Manager is a new way to manage, deploy, and secure HTML5 applications on mobile devices. Invoke is a JavaScript API that lets one application securely run and communicate with another application. You can add the Invoke API to applications that you deploy in Sencha Web Application Manager. Invoke represents a new way of building HTML5 applications. Your applications no longer have to be like islands connected only by a round trip to a server. Using Invoke, applications communicate directly, which lets you build simpler, single purpose applications that expose a simple API.
Applications can communicate using Invoke:
Foreground - Invoke calls enable a user to switch from one application to another. The user can then do work in the second application and when done, Sencha Web Application Client returns the user to the application they started from. A simple example of this is photos. In Sencha Web Application Client, you can have an application that knows where all of your organization's photos are. When another application needs a photo, it redirects the user to the Photos application. The user can select the photos they want, and then the user is returned to the application they started with, and the application has the list of photos the user selected.
Background - Invoke calls open up the possibility of a new class of application communication. Applications can exchange data in the background asynchronously without the user needing to leave the application they are currently in. For example, a Contacts application can communicate with a chat application to get the online/offline status of the current contact and update the contact record. The Contacts application need not integrate a chat library or maintain a connection with a chat/presence server. The application only needs to make a simple API call to the chat application running in Sencha Web Application Client.
You can add the Invoke API by including one statement in your HTML5 or web site application. The application need not have been created using a Sencha product.
<script src="http://space.sencha.io/space.js"></script>
To communicate with another application, get a connection to it:
Ext.space.Invoke.get('photos').then(send, failure);
If the application doesn't exist or your application doesn't have permission to call that application, Sencha Web Application Client calls your app's failure callback:
var failure = function(error) {
console.log('Could not find photos app', error);
}
When you have a connection, your application can start sending messages, in
this case, requesting all the photos taken in the current day (time: 1d):
var send = function(connection) {
connection.send({tags: ['keynote', 'sencha'], time: '1d'}, true).then(usePhoto, failure);
};
The first parameter of send is the JSON data you want to send to the application.
The second parameter is the foreground and background Boolean.
A value of true indicates foreground and false is background.
The user is taken to the Photos application, allowed to select photos, and then the Photos application returns the list of photos to your application using a callback:
var usePhoto = function(photos) {
log('user selected photos', photos);
}
See the full source code for the Photos application.
In the next example, an app calls the chat application in the background
to get the presence of a user. The API calls are nearly identical to the
previous example, except that second parameter of the send function
is set to false to indicate that the application runs in the background.
Ext.space.Invoke.get('chat').then(send, failure);
var send = function(connection) {
connection.send(
{type: 'presence',
user: '[email protected]'}, false)
.then(
success,
failure
);
};
var success = function(message) {
console.log(message);
};
//output
{user: "[email protected]", connected: true, status: 'away' }
Handling messages from other applications is accomplished with the
onMessage API. The onMessage function receives the JSON message,
and creates and returns an Ext.space.Promise request. The Promise must be
resolved to return data to the calling application.
Ext.space.Invoke.onMessage(function(senderId, message) {
var promise = new Ext.space.Promise();
handleMessage(message, promise);
return promise;
});
In handleMessage, the user info is fetched asynchronously and
the response returns to fulfill the promise, else a rejection message
is sent back to the calling application indicating an error.
function handleMessage(message, promise) {
if(message.type == "presence") {
this.getUser(message.user, function(user){
var response = {user: user.email,
connected: user.isConnected,
status: user.status};
promise.fulfill(response);
})
} else {
promise.reject('Message is not understood');
}
}
Sencha Web Application Manager 6.0.0 | Terms of Use