App Development Guide for Samsung Smart TV[V1.20][1] 3
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Transcript of App Development Guide for Samsung Smart TV[V1.20][1] 3
Application Development Guide
for Samsung Smart TV
Version 1.20
Samsung Smart TV
Application Development Guide for Samsung Smart TV
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APPLICATION DEVELOPMENT GUIDE FOR SAMSUNG SMART TV .......................................................... 1
PREFACE ............................................................................................................................................................................ 7
1. INTRODUCTION .................................................................................................................................................... 8
1.1. WHAT IS SAMSUNG SMART TV? .......................................................................................................................... 8
2. SAMSUNG SMART TV ........................................................................................................................................... 9
2.1. OPERATING PRINCIPLE ......................................................................................................................................... 9
2.2. OPERATING ENVIRONMENT .................................................................................................................................. 9
3. APPLICATIONS .................................................................................................................................................... 10
3.1. WHAT ARE APPLICATIONS? ................................................................................................................................. 10
3.2. STRUCTURE OF AN APPLICATION ........................................................................................................................ 10
3.3. DISPLAY TYPE OF APPLICATIONS ........................................................................................................................ 11
3.4. RUNNING AN APPLICATION ................................................................................................................................. 12
3.5. APPLICATION MANAGER .................................................................................................................................... 12
3.6. FEATURES OF SAMSUNG APPLICATIONS ............................................................................................................. 13
4. CREATING AN APPLICATION .......................................................................................................................... 14
4.1. WHAT YOU NEED TO CREATE AN APPLICATION.................................................................................................... 14
4.2. HOW TO MAKE AN APPLICATION ........................................................................................................................ 14
4.2.1. Writing config.xml ..................................................................................................................................... 15
4.2.2. Writing index.html ..................................................................................................................................... 16
4.2.3. Writing JavaScript .................................................................................................................................... 16
4.2.4. Writing a CSS ............................................................................................................................................ 17
4.2.5. Use of the remote control .......................................................................................................................... 18
4.2.6. Complete your work & Sample code ......................................................................................................... 20
4.2.6.1. config.xml ............................................................................................................................................................... 20
4.2.6.2. index.html ............................................................................................................................................................... 21
4.2.6.3. Main.js .................................................................................................................................................................... 21
4.2.6.4. Main.css .................................................................................................................................................................. 22
4.3. CONFIG.XML ....................................................................................................................................................... 23
4.3.1. Tag information ......................................................................................................................................... 23
4.3.2. Example .................................................................................................................................................... 26
4.4. SINGLE-SIGN-ON ............................................................................................................................................... 27
4.4.1. What is Single-Sign-On ............................................................................................................................. 27
4.4.2. Registration of Account Information on Service Sites............................................................................... 28
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4.4.3. How to download account information on service sites in applications ................................................... 30
4.5. RESET ................................................................................................................................................................ 32
4.5.1. What is Reset? ........................................................................................................................................... 32
4.5.2. How Reset Works? .................................................................................................................................... 32
4.5.3. Necessary Features Developers Should Realize ....................................................................................... 32
4.5.4. Guide for Config.xml Realization ............................................................................................................. 32
4.5.5. Guide for Module Realization ................................................................................................................... 32
4.6. EXAMPLE FOR XHR COMMUNICATION .............................................................................................................. 34
5. COMMON MODULES .......................................................................................................................................... 37
5.1. APPLICATION MANAGER’S COMMON MODULES ................................................................................................. 37
5.2. HOW TO USE COMMON MODULES ....................................................................................................................... 37
5.3. TVKEYVALUE ................................................................................................................................................... 37
5.4. WIDGET ............................................................................................................................................................. 40
5.4.1. sendReadyEvent() ..................................................................................................................................... 40
5.4.2. sendExitEvent() ......................................................................................................................................... 41
5.4.3. sendReturnEvent() .................................................................................................................................... 41
5.4.4. blockNavigation() ..................................................................................................................................... 41
5.4.5. putInnerHTML() ....................................................................................................................................... 42
5.4.6. getChannelWidgetListPath() ..................................................................................................................... 43
5.4.7. getSearchWidgetListPath() ....................................................................................................................... 43
5.4.8. runSearchWidget() .................................................................................................................................... 44
5.4.9. checkSapTicket () ...................................................................................................................................... 44
5.4.10. requestSapTicket () .................................................................................................................................... 45
5.5. PLUGIN .............................................................................................................................................................. 45
5.5.1. setOnWatchDog() ...................................................................................................................................... 47
5.5.2. setOffWatchDog() ...................................................................................................................................... 47
5.5.3. setOnOSDState() ....................................................................................................................................... 48
5.5.4. setOffOSDState() ....................................................................................................................................... 48
5.5.5. registKey()................................................................................................................................................. 49
5.5.6. unregistKey() ............................................................................................................................................. 49
5.5.7. registIMEKey() ......................................................................................................................................... 49
5.5.8. unregistIMEKey()...................................................................................................................................... 50
5.5.9. registAllKey............................................................................................................................................... 50
5.5.10. unregistAllKey() ........................................................................................................................................ 51
5.5.11. registFullWidgetKey() ............................................................................................................................... 51
5.5.12. registPartWidgetKey() .............................................................................................................................. 52
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5.5.13. SetBannerState() ....................................................................................................................................... 52
5.5.14. ShowTools()............................................................................................................................................... 53
5.5.15. setOnIdleEvent() ....................................................................................................................................... 54
5.5.16. setOffIdleEvent() ....................................................................................................................................... 54
5.5.17. setOnScreenSaver() ................................................................................................................................... 54
5.5.18. setOffScreenSaver()................................................................................................................................... 55
5.5.19. isViewerKey() ............................................................................................................................................ 55
5.5.20. setOnFullScreen () .................................................................................................................................... 56
5.5.21. setOffFullScreen() ..................................................................................................................................... 56
5.6. CIMAGEVIEWER ................................................................................................................................................ 57
5.6.1. CImageViewer? ......................................................................................................................................... 57
5.6.2. Specifications ............................................................................................................................................ 57
5.6.3. Basic Instructions ..................................................................................................................................... 57
5.6.4. Transition Effect ........................................................................................................................................ 58
5.6.4.1. Action Principles of Slideshow ............................................................................................................................... 59
5.6.4.2. How to Realize Transition Effect ............................................................................................................................ 60
5.6.4.3. Slideshow Mode and Restrictions ........................................................................................................................... 61
5.6.5. Events ........................................................................................................................................................ 62
5.6.6. Play local files .......................................................................................................................................... 62
5.6.6.1. Play Images in an Application ................................................................................................................................ 62
5.6.6.2. Play images in USB ................................................................................................................................................ 63
5.6.7. Reference................................................................................................................................................... 64
5.6.7.1. CImageViewer ........................................................................................................................................................ 64
5.6.7.2. Effect ...................................................................................................................................................................... 65
5.6.7.3. clearScreen() ........................................................................................................................................................... 66
5.6.7.4. destroy() .................................................................................................................................................................. 66
5.6.7.5. endSlideshow() ....................................................................................................................................................... 67
5.6.7.6. getStopFlag() .......................................................................................................................................................... 67
5.6.7.7. hide() ....................................................................................................................................................................... 68
5.6.7.8. isEffectAvailable() .................................................................................................................................................. 68
5.6.7.9. play() ....................................................................................................................................................................... 68
5.6.7.10. prepareNext() ..................................................................................................................................................... 69
5.6.7.11. setFrameArea() ................................................................................................................................................... 70
5.6.7.12. setOnBufferingComplete() ................................................................................................................................. 71
5.6.7.13. setOnBufferingStart() ......................................................................................................................................... 71
5.6.7.14. setOnNetworkError() .......................................................................................................................................... 72
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5.6.7.15. setOnRenderError() ............................................................................................................................................ 72
5.6.7.16. setOnRenderingComplete () ............................................................................................................................... 73
5.6.7.17. show() ................................................................................................................................................................. 73
5.6.7.18. showNow () ........................................................................................................................................................ 73
5.6.7.19. startSlideshow () ................................................................................................................................................. 74
5.6.7.20. stop () ................................................................................................................................................................. 75
6. TIPS FOR APPLICATION DEVELOPERS ........................................................................................................ 76
6.1. FUNCTION NECESSARY TO BE CALLED WHEN YOU OPEN AN APPLICATION .......................................................... 76
6.2. ACCESS POINT ................................................................................................................................................... 76
6.3. HANDLING REMOTE CONTROL KEY EVENTS ....................................................................................................... 76
6.4. REMOTE CONTROL KEYS FOR APPLICATIONS ...................................................................................................... 77
6.5. CLOSING AN APPLICATION .................................................................................................................................. 79
6.6. PREVENTION OF CLOSING THE TV SCREEN BY THE RETURN OR EXIT KEY .......................................................... 79
6.7. ADDITIONAL INFORMATION ............................................................................................................................... 79
6.8. WHAT CSS NEED TO CONTAIN ........................................................................................................................... 80
6.9. LOADING IMAGES IN ADVANCE .......................................................................................................................... 80
6.10. CHARACTER OF THE <INPUT> TAG ................................................................................................................. 81
6.11. SCROLL BAR ...................................................................................................................................................... 81
6.12. MAKING DYNAMIC WEB PAGES ...................................................................................................................... 81
6.13. SETTING FOR LETTER-SPACING ...................................................................................................................... 82
6.14. MEMORY MANAGEMENT ................................................................................................................................ 82
6.14.1. Using XMLHttpRequest ............................................................................................................................ 82
6.14.2. Freeing up the memory ............................................................................................................................. 82
6.15. WATCH DOG .................................................................................................................................................. 82
6.16. PREVENTION FOR OSD DISTORTION............................................................................................................... 83
6.17. SUPPORT CSS TEXT-OVERFLOW ..................................................................................................................... 83
6.18. DIRECTIONS FOR CREATING VIDEO APPLICATION ............................................................................................ 83
6.19. USING IME .................................................................................................................................................... 83
6.20. MINIMIZING INITIAL ENTRY SPEED OF AN APPLICATION .................................................................................. 83
6.20.1. Load Javascript On-Demand .................................................................................................................... 83
6.20.2. Load CSS Background Image On-Demand ............................................................................................... 84
6.20.3. Separation of Main.onLoad functions ....................................................................................................... 84
6.21. DIRECTIONS FOR DYNAMIC LOADING OF CSS ............................................................................................... 85
7. APP ENGINE .......................................................................................................................................................... 87
7.1. APP ENGINE? ..................................................................................................................................................... 87
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7.2. STANDARD SPECIFICATIONS ............................................................................................................................... 87
8. FILE API ................................................................................................................................................................. 88
8.1. FILE API? .......................................................................................................................................................... 88
8.2. API .................................................................................................................................................................... 88
8.2.1. FileSystem() .............................................................................................................................................. 88
8.2.2. openCommonFile() ................................................................................................................................... 89
8.2.3. closeCommonFile() ................................................................................................................................... 90
8.2.4. deleteCommonFile() ................................................................................................................................. 90
8.2.5. createCommonDir() .................................................................................................................................. 91
8.2.6. deleteCommonDir() .................................................................................................................................. 91
8.2.7. isValidCommonPath() ............................................................................................................................... 92
8.2.8. readLine() ................................................................................................................................................. 92
8.2.9. writeLine() ................................................................................................................................................ 93
8.2.10. readlAll() ................................................................................................................................................... 93
8.2.11. writeAll() ................................................................................................................................................... 94
8.2.12. readDir() ................................................................................................................................................... 94
8.2.13. openFile() ................................................................................................................................................. 95
9. APPENDIX .............................................................................................................................................................. 96
9.1. COUNTRY CODE ................................................................................................................................................. 96
9.2. LANGAUAGE CODE ............................................................................................................................................ 97
9.3. REGION CODE .................................................................................................................................................... 99
9.4. PRODUCT CATEGORY ....................................................................................................................................... 100
9.5. CAUTION INFORMATION ................................................................................................................................... 100
9.5.1. Character sensitive target device ............................................................................................................ 100
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Preface
Purpose of Document
This document is written to help application developers who enjoy the Samsung Smart TV service by
providing an overview of the service and basic knowledge required to be obtained by application
developers. Using this document, developers can develop and manage applications for digital TVs.
Target Readers
This document is aimed at programmers who have used web development languages such as HTML, CSS
and JavaScript. This document will be even more helpful for those who have web development experience.
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1. Introduction
This section describes what Samsung Smart TV is, how it is configured and how it works.
1.1. What is Samsung Smart TV?
Samsung Smart TV is a web-based application running on an application engine installed in digital TVs
connected to the Internet. The Samsung Smart TV service makes it possible to extend the functions of the
TV by applying a variety of web functions to it, so that users can obtain useful information and interesting
content on their TV screens. Users can check internet services such as news, weather, stock, UCC with
simple operation.
With Samsung Smart TV, digital TV users can not only download applications from HubSite and install them
in their TVs but also personally develop applications tailored to their needs and install them in their TVs.
HubSite
Samsung Smart TV
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2. Samsung Smart TV
This section describes the operating principle and environment of Samsung Smart TV.
2.1. Operating principle
With Samsung Smart TV installed in the TV, users can run Internet-based applications on the TV screen. An
application is a special type of web page that is implemented on a web browser and runs on the TV screen.
Viewing an application is very much like viewing web pages using a web browser on an ordinary PC.
Differences between applications and web pages are made by screen resolution, hardware specifications
and remote controller, the user interface for Samsung Smart TV installed TVs.
2.2. Operating environment
Browser App Engine 6.0
TV screen resolution 1280x720 pixel, 960 Ⅹ 540 pixel
We will look at App Engine, the browser dedicated to internet TVs manufactured by Samsung, in Chapter 7.
App Engine.
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3. Applications
This section looks at applications that we will develop for Samsung TVs.
3.1. What are applications?
Applications are web-based small
applications that are run in digital TVs
connected to the internet. They are installed
in TVs via the Internet and are run on App
Engine. It is safe to say that they are web
pages displayed on the TV screen having the
remote control as the only user interface.
The Application Manager (N.Navi.) controls
installing and removing applications, and performing other works for them.
You can exploit the Software development kit (SDK) to develop new applications designed to be run on
your TV screen.
3.2. Structure of an application
An application is a web page consisting of HTML, CSS and JavaScript, and for Samsung TVs it is run on App
Engine. The HTML page shows the structure of the application, the CSS file does the style, and the
JavaScript file controls the behavior of the application. If you want to run an application on the TV screen,
you have to create a config.xml file containing information on the operating environment and the version
of the application. If you want to get more information about config.xml, see Ch. 4.3 config.xml.
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3.3. Display type of applications
Display type Description Screen layout
Full-screen
application
Fills the entire screen with an
application.
Single-wide
application
Makes an application displayed
only on part of the screen.
Ticker
Keeps an application on the
screen while you do other
things with your TV.
* The application will be launched in Europe must be Full-screen application.
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3.4. Running an application
In order to start an application, you are required to follow the steps below:
Step Instruction description
Get the Application
Manager started
Press the INTERNET(INFO.L) button on the remote control or go through Menu>
Application>Samsung Smart TV to open the application
Select an application Press arrow button located in the center of the remote control to select an
application.
Implement an
application
Press the Enter button to implement an application. The Application Manager
reads the information from the config.xml file of the currently running
application to set an operating environment, and reads index.html to implement
the application.
3.5. Application Manager
The Application Manager serves as a “manager” that has the authority to authenticate, install, delete,
update, open and finish applications. With the Application Manager, users can install or delete
applications, and also register applications they‟ve developed and run them on the TV. The Application
Manager is also an application that is continuously updated via the Internet.
뚯Smart Hub
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Samsung Apps Settings
Edit Mode Sort by
3.6. Features of Samsung applications
Applications for Samsung Smart TV allow you to enjoy functions that only TVs have, unlike general web
pages. For example, using plugins, you can volume up or down the application and play video other than
broadcasting on the TV screen. In addition, you can use a file storage system. If you want to get detailed
information on plug-ins and file storage system, refer to Ch. 7 and 8 File API.
The Application Manager provides several JavaScript modules used in applications. This enhances
convenience of application development. If you want to get detailed information on use of a common
module, see Ch. 5 Common modules.
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4. Creating an application
This section guides you to create a simple application.
4.1. What you need to create an application
Our final goal is to create applications and run them on the TV screen. To this end, you need a Samsung
TV connected to the Internet and an SDK or a text editor with which you can write HTML, JavaScript and
CSS files. The SDK is equipped with a simulator with which you can run an application you‟ve created
before actually installing it in your TV. So, if you use an SDK, you can make an application in a more
convenient way.
4.2. How to make an application
An application should contain at least the following elements:
An index.html file. The file serves as the access point of the application.
An application configuration file. This is an XML file in the root of the application structure that holds
information about setting an application.
JavaScript files. These are used for a preview of the application and for controlling the behavior of
the application.
CSS files. The look of the application is determined by these files.
Image files, which are used by your application.
Let‟s make an application that displays text written in CSS and responds to remote control buttons events.
The structure and look of an application we will make now are shown as below.
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4.2.1. Writing config.xml
The config.xml file is called first among all the files the application has in it. <ver> tag value decides
whether to update the application and images designated in <ThumbIcon> tag are shown in thumbnail. For
information about other tags, turn to Ch. 4.3. config.xml.
<?xml version="1.0" encoding="UTF-8"?> <widget> <ThumbIcon>Resource/image/icon/picasa_106.png</ThumbIcon> <BigThumbIcon>Resource/image/icon/picasa_115.png</BigThumbIcon> <ListIcon>Resource/image/icon/picasa_85.png</ListIcon> <BigListIcon>Resource/image/icon/picasa_95.png</BigListIcon> <category>lifestyle</category> <autoUpdate>y</autoUpdate> <cpname>MyCP</cpname> <cpauthjs></cpauthjs> <login>y</login> <ver>0.930</ver> <mgrver>1.000</mgrver> <fullwidget>n</fullwidget> <srcctl>n</srcctl> <ticker>n</ticker> <childlock>n</childlock> <audiomute>n</audiomute> <videomute>n</videomute> <dcont>y</dcont> <network>y</network> <hubsite>n</hubsite> <widgetname>HelloWorld</widgetname> <description>Welcome!</description> <width>960</width> <height>540</height> <author> <name>Samsung Electronics Co. Ltd.</name> <email></email> <link>http://www.sec.co.kr/</link> <organization>Samsung Electronics Co. Ltd.</organization> </author>
</widget>
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4.2.2. Writing index.html
What you have to do next is writing index.html which will be the access point of the application. The
following example is about HTML code that includes the Main.js file under the JavaScript folder and calls
the Main.onLoad() function when the document is loaded.
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Hello World!!</title>
<script type="text/javascript" language="javascript" src="JavaScript/Main.js"></script>
</head>
<body onload="Main.onLoad();">
<div>Welcome to Samsung application world!</div>
</body>
</html>
4.2.3. Writing JavaScript
If the HTML document is loaded, the onLoad() function of the Main object is called, because you
registered the Main.onLoad() function in the onload property in the <body> tag. Make a Main object and
add the onload function.
var Main = { // Main object
}
Main.onLoad = function () { // called by <body>'s onload event
alert("Main.onLoad()");
/**
* JavaScript code Here!
*/
}
If you have done all the work, you will get a debug message of Main.onLoad(). But the „Welcome to
Samsung application world!‟ that you entered will not appear on the TV screen. If the application is
successfully loaded, it has to ask the Application Manager to display itself on the screen using the common
module provided by the Application Manager. The common module is a library containing essential
functions provided by the Application Manager. For more information, refer to Ch. 5 Common Modules. Add
the following code to <head> of index.html.
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<script type="text/javascript" language="javascript"
src="$MANAGER_WIDGET/Common/API/Widget.js"></script>
If the above code is added, a common module is available to use by JavaScript. Declare the common
module as a global variable for Main.js you were working on and call the sendReadyEvent() function. By
doing this, you can make the Application Manager display an application on the screen.
var Main = { // Main object
}
var widgetAPI = new Common.API.Widget(); // Create Common module
Main.onLoad = function () { // called by <body>'s onload event
alert("Main.onLoad()");
widgetAPI.sendReadyEvent(); // Send ready message to Application Manager
/**
* JavaScript code Here!
*/
}
Ok, now run the application you‟ve just made. You will see the words “Welcome to Samsung application
world!” that you entered in the index.html file appearing on the screen. Maybe you don‟t like the look of
the application because its font size is too small and font color is just simple black. You may want to make
your application more stylish. Then, you can give the application a style using CSS.
4.2.4. Writing a CSS
Add the following string in <head> in the index.html file.
<link rel='stylesheet' type='text/css' href = 'CSS/Main.css'/>
Assign an ID to <div> in the index.html file.
<div id='welcome'>Welcome to Samsung application world!</div>
Create a file in the CSS folder and enter text as you see in the below box to specify the style of the
„welcome‟ element.
body {
margin: 0;
padding: 0;
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background-color: transparent;
}
#welcome {
position: absolute;
left: 50px;
top: 50px;
width: 500px;
height: 50px;
background-color: #AFAFAF;
color: #99FFFF;
font-size: 30px;
text-align: center;
}
4.2.5. Use of the remote control
Now, we‟ll make your application respond to the remote control. By pressing any of the five buttons
located in the center of the remote control, you can change the words your application displays on the
screen.
If a button on the remote control is pressed, a „keydown‟ event occurs. An element having focus is
required to receive the event to the index.html file. Add <a> element and Register a function that will be
executed when that event occurs in the onkeydown property. Place focus on <a> and press the remote
control key, the function registered previously is executed.
Add <a> which executes Main.keyDown() method when a „keydown‟ event occurs.
<body onload="Main.onLoad();">
<div id='welcome'>Welcome to Samsung application world!</div>
<a href='javascript:void(0);' id='anchor' onkeydown='Main.keyDown();'></a>
</body>
Write a keyDown() method bringing key code value when pressing the remote control key
Main.keyDown = function(){ // Key handler
var keyCode = event.keyCode;
alert("Main Key code : " + keyCode);
}
In a function processed by keys such as keydown(), each key has its own key code value.
The Application Manager provides a common module containing key code values to distinguish keys. Add
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the below code to <head> in the index.html file to use a common module „TVKeyValue‟.
<script type="text/javascript" language="javascript"
src="$MANAGER_WIDGET/Common/API/TVKeyValue.js"></script>
Modify Main.js in order to change the contents of „welcome‟ Div. This creates common module objects,
classify keys in keydown() method, and define actions for each key. For detailed information on common
modules and key code list, see Chapter 5. Common Modules.
var Main = { // Main object
}
var widgetAPI = new Common.API.Widget(); // Create Common module
var tvKey = new Common.API.TVKeyValue();
Main.onLoad = function(){ // called by <body>'s onload event
alert("Main.onLoad()");
widgetAPI.sendReadyEvent(); // Send ready message to Application Manager
document.getElementById("anchor").focus(); // Focus to Anchor for handling key inputs
// from remote controller
/**
* JavaScript code Here!
*/
}
Main.keyDown = function(){ // Key handler
var keyCode = event.keyCode;
alert("Main Key code : " + keyCode);
switch (keyCode) {
case tvKey.KEY_LEFT:
alert("left");
document.getElementById("welcome").innerHTML = "Nice to meet you.";
/**
* Code for Left key event!
*/
break;
case tvKey.KEY_RIGHT:
alert("right");
document.getElementById("welcome").innerHTML = "I'm so happy.";
break;
case tvKey.KEY_UP:
alert("up");
document.getElementById("welcome").innerHTML = "I Love you.";
break;
case tvKey.KEY_DOWN:
alert("down");
document.getElementById("welcome").innerHTML = "Good job.";
break;
case tvKey.KEY_ENTER:
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alert("enter");
break;
case tvKey.KEY_RETURN:
break;
}
}
You will see the value of the „welcome‟ Div tag change as you press the up, down, left or right button.
4.2.6. Complete your work & Sample code
With Samsung Smart TV, you can do almost everything you do on a web page. You can create “TV-
oriented” applications with extended functions using many plugins.
The below are the codes we‟ve written until now.
4.2.6.1. config.xml
<?xml version="1.0" encoding="UTF-8"?>
<widget> <ThumbIcon>Resource/image/icon/picasa_106.png</ThumbIcon> <BigThumbIcon>Resource/image/icon/picasa_115.png</BigThumbIcon> <ListIcon>Resource/image/icon/picasa_85.png</ListIcon> <BigListIcon>Resource/image/icon/picasa_95.png</BigListIcon>
<previewjs>PreviewHelloWorld</previewjs>
<cpname>Samsung</cpname>
<cplogo>Resource/image/settings_logo.png</cplogo>
<cpauthjs></cpauthjs>
<ver>0.930</ver>
<mgrver>1.000</mgrver>
<fullwidget>n</fullwidget>
<srcctl>n</srcctl>
<ticker>n</ticker>
<childlock>n</childlock>
<audiomute>n</audiomute>
<videomute>n</videomute>
<dcont>y</dcont> <network>y</network>
<hubsite>n</hubsite>
<widgetname>HelloWorld</widgetname>
<description>Welcome!</description>
<width>960</width>
<height>540</height>
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<author>
<name>Samsung</name>
<email></email>
<link>http://acme-widget.example.com</link>
<organization>Acme Examples, Inc.</organization>
</author>
</widget>
4.2.6.2. index.html
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Hello World!!</title>
<script type="text/javascript" language="javascript"
src="$MANAGER_WIDGET/Common/API/Widget.js"></script>
<script type="text/javascript" language="javascript"
src="$MANAGER_WIDGET/Common/API/TVKeyValue.js"></script>
<script type="text/javascript" language="javascript" src="JavaScript/Main.js"></script>
<link rel='stylesheet' type='text/css' href = 'CSS/Main.css'/>
</head>
<body onload="Main.onLoad();">
<div id='welcome'>Welcome to Samsung widget world!</div>
<a href='javascript:void(0);' id='anchor' onkeydown='Main.keyDown();'></a>
</body>
</html>
4.2.6.3. Main.js
var Main = { // Main object
}
var widgetAPI = new Common.API.Widget(); // Create Common module
var tvKey = new Common.API.TVKeyValue();
Main.onLoad = function(){ // called by <body>'s onload event
alert("Main.onLoad()");
widgetAPI.sendReadyEvent(); // Send ready message to Application Manager
document.getElementById("anchor").focus(); // Focus to Anchor for handling key inputs
// from remote controller
/**
* JavaScript code Here!
*/
}
Main.keyDown = function(){ // Key handler
var keyCode = event.keyCode;
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alert("Main Key code : " + keyCode);
switch (keyCode) {
case tvKey.KEY_LEFT:
alert("left");
document.getElementById("welcome").innerHTML = "Nice to meet you.";
/**
* Code for Left key event!
*/
break;
case tvKey.KEY_RIGHT:
alert("right");
document.getElementById("welcome").innerHTML = "I'm so happy.";
break;
case tvKey.KEY_UP:
alert("up");
document.getElementById("welcome").innerHTML = "I Love you.";
break;
case tvKey.KEY_DOWN:
alert("down");
document.getElementById("welcome").innerHTML = "Good job.";
break;
case tvKey.KEY_ENTER:
alert("enter");
break;
case tvKey.KEY_RETURN:
break;
}
}
4.2.6.4. Main.css
body {
margin: 0;
padding: 0;
background-color: transparent;
}
#welcome {
position: absolute;
left: 50px;
top: 50px;
width: 500px;
height: 50px;
background-color: #AFAFAF;
color: #99FFFF;
font-size: 30px;
text-align: center;
}
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4.3. config.xml
The config.xml file contains information about the application‟s execution, update, operating environment
setting and other related issues. Depending on that information, the Application Manager controls the
version of your application, sets an environment in which your application is run, and creates and manages
user accounts. The config.xml file should be located in the directory in which the application is installed,
and contain the following elements.
4.3.1. Tag information
Element Description Value
<widget> Indicates that the information is relevant to the application. -
<ThumbIcon> An icon image displayed in the Application Manager.
It is used in case of no focus and its size is 106 x 86pixel. File path
<BigThumbIcon>
An icon image displayed in the Application Manager.
It is used in case that the focus is placed on an image and its size is 115
x 95 pixel.
File path
<ListIcon> An icon image displayed in the Application Manager.
The size is 85 x 70 pixel. File path
<BigListIcon> An icon image displayed in the Application Manager.
The size is 95 x 78 pixel. File path
<category> The category to distinguish applications, available items are video,
sports, game, lifestyle, information, others. String
<autoUpdate> Decides whether to synchronize with hub site. The
application which doesn‟t need synchronization chooses ‟n‟. y | n
<apptype>
Shows information on contents type
- 11: HTML + java-script + Flash Player Object
- 12: Adobe SWF ( Ver. Flash Lite 3.1 )
- 13: Adobe SWF ( Ver. Flash 10.1 )
- 14 : Lua Script
Number
<contents>
File path and name at the initial execution of contents
Only the following apptype needs contents tag.
- 12: Adobe SWF ( Ver. Flash Lite 3.1 )
- 13: Adobe SWF ( Ver. Flash 10.1 )
- 14 : Lua Script
File Path
<channelType> Channel Bound Service Type(optional) root | child
<channelRoot> Confirms the relations with root-child clarifying root application ID. Application
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24
(Optional, Only when the channel bound service type is child.)
When connected to more than one root, roots are distinguished by ::.
ID
<channelName>
Channel information to be executed channel bound
service (Distinguish each channel using :: Ex
AAA::BBB::CCC)
(Optional, only if channel bound service type is root.)
String
<channelDisplay>
It decides whether the installed channelbound service is displayed on
the first main screen or not.
(If you want to hide the service in the first main screen, select „n‟.)
y | n
<previewjs> deleted String
<cpname> Enter the application provider in this tag. String
<cpauthjs>
The name of the JavaScript file that allows you to confirm account
information of application providers. This file has to be written in a
defined format.
String
<cplogo> deleted File path
<preIcon> deleted File path
<login>
Decides a service is available to signin or not. If you select „y‟, you can
enter ID and password in Integrated Sign-in site of Application Manager
for sign-in. Validity verification should be preceded in JavaScript file
corresponding to <cpauthjs> tag value.
y | n
<ver>
Indicates the application version. Depending on that version
information, the server computer updates the corresponding
application.
x.xxx
<mgrver> Indicates the Application Manager‟s version that is required to run an
application having the config.xml file. x.xxx
<fullwidget>
Indicates whether the application is a full-screen or a single-wide one.
Display type affects the audio policy of the application when it‟s run.
Refer to Chapter. 6.4. Using Keys on Remote Control for details.
y | n
<srcctl>
If source conversion is needed, set this tag to y. (ex. YouTube
application).
If you select „y‟, the TV source automatically switched from current TV
channel or external input to the internal media player, and back again
when the application is finished.
y | n
<childlock> Determines whether to use the childLock function. This function enables
the user to lock an application. y | n
<audiomute> Turns on and off the audio. If you select „y‟, TV broadcasting sound is y | n
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25
not outputted when entering the application. Set „y‟ if the application
occupies full screen and set „n‟ if the application occupies parts of the
screen.
<videomute> Turns on and off the video. If you select „y‟, TV broadcasting is not on
the screen when entering the application. y | n
<dcont>
Sets the Disable dynamic contrast function.
Dynamic contrast is the function to adjust TV contrast ratio and brighten
TV screen by darkening the dark screen and lightening the light screen.
The screen might get lighter or darker when application is on with
Dynamic contrast.
„y‟ turns off the Dynamic contrast, and „N‟ turns on the Dynamic
contrast. If the application is occupied on full screen, select „y‟ to
remove sparkling. If the application is partially occupied, select „n‟.
y | n
<movie>
Application playing video files can bring problems as stated below.
1. If a video file is played in a device connected to HDMI port such as
DVD Player when executing an application (ex. YouTube) converting
sources, sounds can be mixed.
2. Sparkling at the entry for appliction due to the difference of Frame
rate between the TV image and playing video file.
If you select „y‟, you can prevent it from the problem above by ending
operating the connected HDMI device when executing the application
and fixing the Frame rate.
y | n
<widgetname> Enter a name of application. String
<description> Enter a brief description of the application. String
<width> <height> Enter the screen area that the application will be occupying. Generally,
it is recommended to enter 960 * 540 pixels, digital TV specification. Number
<author> Enter a description of the author. string
<network>
This tage is used when needed to check network while operating an
application. If the tage value is „y‟ and the network test result is „fail‟,
entry for the application can be blocked with a message indicating the
failure.
Without any set value, default is „y‟.
y | n
<hubsite>
This tage is used when needed to check whether the hubsite has been
authorized or not while operating an application. If the tage value is „y‟,
and the hubsite has not been authorized, entry for the application can
be blocked with a message indicating the failure.
y | n
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Without any set value, default is „n‟.
<pushNotice> Indicates whether the application provides Push Notification Service.
Without any set value, default is „n‟. y | n
<pushControl> This tag is reserved for former Push Notification Service.
Without any set value, default is „n‟. y | n
<pushUerbinding> Indicates whether Push Notification Service is provided for specific user.
Without any set value, default is „n‟. y | n
<flashplayer> This tag should be enabled for application that use embedded flash
player object, or stand-alone flash player. y | n
4.3.2. Example
<?xml version="1.0" encoding="UTF-8"?> <widget> <ThumbIcon>Resource/image/icon/picasa_106.png</ThumbIcon> <BigThumbIcon>Resource/image/icon/picasa_115.png</BigThumbIcon> <ListIcon>Resource/image/icon/picasa_85.png</ListIcon> <BigListIcon>Resource/image/icon/picasa_95.png</BigListIcon> <category>lifestyle</category> <autoUpdate>y</autoUpdate> <cpname>Picasa</cpname> <cpauthjs>Auth11101000000</cpauthjs> <login>y</login> <ver>2.000</ver> <mgrver>1.035</mgrver> <fullwidget>y</fullwidget> <srcctl>n</srcctl> <ticker>n</ticker> <childlock>n</childlock> <audiomute>y</audiomute> <videomute>y</videomute> <dcont>y</dcont> <movie>y</movie> <network>y</network> <hubsite>n</hubsite> <widgetname>Picasa Web Albums</widgetname> <description>View photo albums online</description> <width>960</width> <height>540</height> <author> <name>Samsung Electronics Co. Ltd.</name> <email></email> <link>http://www.sec.co.kr/</link> <organization>Samsung Electronics Co. Ltd.</organization> </author> </widget>
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4.4. Single-Sign-On
This section describes SSO functions supported by the application manager, how to register account
information and get the information from the application.
4.4.1. What is Single-Sign-On
Input of account information via TV remote control is so inconvenient that users could be stressed out if
they should enter account information whenever they use the application. To improve this inconvenience,
Single-Sign-On (hereinafter referred to as “SSO”) is provided by application manager. Application manager
saves the account information that users have entered and sends it to the application. These enable users
not to enter account information repetitively. The account information is encrypted and saved in safe area.
SSO operates as stated below.
① Generate a TV Account
It is necessary to create a TV account to use SSO. TV account is an account generated in the Application
manager and has four-digit PIN number as a password. You can make the account in Settings->Samsung
Smart TV-ID.
② Register Service Sites
Registers account information of service sites (ex: YouTube, Picasa) in the generated TV account. Only
when the entered account information is determined valid, the information is registered in the account.
Registration can be made in „Settings‟ -> Samsung Smart TV ID.
③ Sign-in to TV account
You can sign in to the TV account created in ① pressing Red key on the initial screen. In general, account
information on several service sites can be registered in a TV account. Sign-in make you enable to get
account information on a service site you want to get in several applications.
④ Execution of an Application
At this stage, the application manager decides whether the application SSO is available to sign in or not. If
available, the account information is given. Account information should be inputted through the process in
②.
⑤ Use account information on service sites
In an application, account information coexists with various circumstances information provided by the
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28
application manager. Thus, it is required to use account information after parsing.
Following chapter describes modules necessary to be realized in an application to register service sites,
how to parse and use the account information received by the application manager.
4.4.2. Registration of Account Information on Service Sites
Registration of account information on service sites can be done through „Settings‟ -> Samsung Smart TV ID.
If you wish to display the names of the service sites you want to show, configure config.xml as suggested
below.
<cpname>YourCompany</cpname>
<login>y</login>
Then, you can find YourCompany item in the list of service sites. If you can‟t, restart TV. Application
manager could need to be reloaded.
Now, the account information on service site, „YourCompany‟ can be entered. However, if there is no
module which confirms validity of the entered account information, the registration cannot be completed.
You should generate the module in person.
Validity Confirmation is to make sure that the entered account information is consistent with the ID and
Password which are available to sign-in on the real service site. If sign-in can be made by API in each
service site, the information is turned out to be valid.
In Google, there is ClientLogin to judge validity. If sign-in is successfully done and auth token is granted,
the account information is regarded valid. Refer to the URL states below regarding Client Login.
(http://code.google.com/intl/ko/apis/accounts/docs/AuthForInstalledApps.html)
The module to confirm validity of account information is drawn up as shown below.
① Enter the name of js file whose config.xml has a module.
Put the name of js file which has a module to confirm account information validity in <cpauthjs> item. If
the file name is Auth11101000000.js, put Auth11101000000. The application manager executes the module
including the file. File names should be unique for each application. Check the variables such as
curWidget.id and write the name distinctively.
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<cpauthjs>Auth11101000000</cpauthjs>
② Create a file
Create a js file corresponding to the entered file name in the process of ①. A module will be written in
this file. This file is embedded in the top level directory where index.html exists.
③ Draw up a module which confirms validity of account information.
This module is generated in the file made in ②, the format should be in observance of regulations.
Declare the object whose name is the entered value in ①.
Add a method „checkAccount‟ to the object.
checkAccount method confirms validity of the account information on the service site, and it should
deliver the results to the callback function transferred to the factor.
Example
// Object Generated
var Auth11101000000 = {
}
// checkAccount Method Added
Auth11101000000.checkAccount = function (id, pw, fnCallback) {
/**
* The id and pw inputted from the application manager are transferred to the factor.
* Check validity of id and pw, and then operate callback function.
*/
// ...
// Confirmation on Validity
// ...
// Deliver the results
if (isValidAccount) {
fnCallback ('TRUE');
}
else {
fnCallback ('FALSE');
}
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}
The value transferring to the Callback function and the effect are like below.
Return value Description
'TRUE' If the transferred ID and Password are valid, return „TRUE‟.
Application manager registers ID and Password in the TV account.
'FALSE' If the account information is invalid, return „FALSE‟.
The application Manager let the user reenter the account information.
'ERROR' Errors occur while confirming validity, return „ERROR‟. The application manager
regards it as an error, after a while, it leads the user to try reusing account
information.
Others Values other than three values above are processed identically with „ERROR‟.
4.4.3. How to download account information on service sites in applications
Applications are able to get account information on service sites. Proceed like the order stated below.
① Configure config.xml like below.
This enables the application manager to understand that this application is available to sign-in and
necessary service site is ‟YourCompany‟.
<cpname>YourCompany</cpname>
<login>y</login>
② Sign-in to the TV account
The account information registered in the account can be available when sign-in process to the TV account
is completed.
③ Execution for an application
Execute the application. Account information on CP(YourCompany) needs to be registered in the
designated TV account in ①. Generally, several service sites are registered in a TV account, on the other
hand, an application can get one service site relevant to the designated CP in ①.
④ How to parse ID and Password
All the conditions are satisfied, ID and Password are transferred to Browser global variable
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window.location.search. This variable includes circumstances information, and it should be parsed. Refer
to 6.7 for further information on window.location.search.
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4.5. Reset
Reset describes functions to initialize the application.
4.5.1. What is Reset?
The function to execute initial modules realized by applications when deleting or initializing applications
in Application Manager.
4.5.2. How Reset Works?
1. Application Manager brings information in config.xml of the installed application when
deleting/initializing.
2. Check if the application needs a module which initializes through the information in config.xml.
3. If the application has the module that initializes, bring information on the module.
4. Execute the module in accordance with rules and try initializing.
* Application Manager does not obtain any return value but operate the module to initialize.
4.5.3. Necessary Features Developers Should Realize
1. Peculiar Information on config.xml(Refer to Chapter 4)
2. Initialization Module (Refer to Chapter 5)
4.5.4. Guide for Config.xml Realization
Add xml Element as shown below.
<deleteJS>MyReset</deleteJS>
* Without deleteJS Element, the application does not operate the initialization module.
4.5.5. Guide for Module Realization
1. The file name should be the same as class name.
2. No factor.
3. The name of function is “reset”.
var MyReset= {
…
}
MyReset.reset = function() {
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...
...
alert("Reset Complete!");
}
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4.6. Example for XHR communication
In this section, we‟ll look at an example for XHR communication, which is a key factor comprising AJAX
technology.
The below example is HTML code that includes XHRExample.js, and executes the XHRExample.onload()
function when the „load‟ event occurs.
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>XHR Example</title>
<script type="text/javascript" language="javascript"
src="$MANAGER_WIDGET/Common/API/TVKeyValue.js"></script>
<script type="text/javascript" language="javascript"
src="$MANAGER_WIDGET/Common/API/Widget.js"></script>
<script type="text/javascript" language="javascript" src="XHRExample.js"></script>
</head>
<body onload="XHRExample.onload()">
<div id='intro'>XHR Example.</div>
</body>
</html>
The below is JavaScript code. XHRExample is has been declared as an object and has the variable of
XHRObj in it. If XHRObj already exists, XHRExample calls the destroy() method. We will look at this more
specifically later in this chapter. If an XHR object has been successfully created, set it and request data. If
the state of XHR changes to 4, which means data reception is completed, recieveData() that you
registered in onreadystatechange is executed.
var XHRExample = {
XHRObj : null
}
var tvKey = new Common.API.TVKeyValue();
var widgetAPI = new Common.API.Widget();
XHRExample.onload = function () {
widgetAPI.sendReadyEvent();
var URL = ""; // Test URL here
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if (this.XHRObj != null)
this.XHRObj.destroy();
this.XHRObj = new XMLHttpRequest();
if (this.XHRObj) {
this.XHRObj.onreadystatechange = function () {
if (XHRExample.XHRObj.readyState == 4) {
XHRExample.recieveData();
}
};
this.XHRObj.open("GET", URL, true);
this.XHRObj.send(null);
}
}
XHRExample.recieveData = function () {
alert(this.XHRObj.responseText);
}
The above example has two remarkable points. One is that the variable of XHRObj is in the XHRExample
object. The other is that the destroy() method is called before an object is assigned to XHRObj.
With Samsung TVs, if you run out of the memory by continuing to create and use the XHR object,
applications in your TV do not work anymore at a certain time. In order to avoid this kind of situation, you
should delete objects you used in the past and assign new ones when you use XHR. To free up objects that
had been used, the object pointer should be maintained. For this, developers should memorize and
manage the variable dealing with XHR objects.
If you want to remove an XHR object from the memory, use the destroy() method of it, and this is the
method that App Engine provides to allow you to use the limited memory efficiently.
XHRObjet.destroy
Free up the XHR object you created from the memory.
Syntax XHRObject.destroy()
Parameter None
Return Value None
Remarks This function, which is executed to optimize the memory usage, is only provided by
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App Engine for Samsung TV users.
Example
if (this.XHRObj != null)
this.XHRObj.destroy();
this.XHRObj = new XMLHttpRequest();
In the above example, two common modules provided by the Application Manager are included. For more
information, turn to Ch. 5 Common modules.
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5. Common modules
In this section, we will look at a library shared by all your applications.
5.1. Application Manager’s common modules
The Application Manager provides object modules that all your applications can use. Those common
modules enable your applications to do basic work to be normally running on the screen. Also, using
common modules, individual applications can recognize and identify remote control button events, use
plugins, and communicate with the Application Manager in more convenient and simpler ways.
5.2. How to use common modules
Include common modules you want to use in the index.html file. In order to prevent occurrence of any
parsing order error, it is recommended that you include them at the top of the document.
„$MANAGER_WIDGET‟ allows your applications to access common modules provided by the Application
Manager.
* In SDK, „$MANAGER_WIDGET‟ points the „commonlib‟ folder that SDK installed in.
<script type="text/javascript" language="javascript"
src="$MANAGER_WIDGET/Common/API/TVKeyValue.js"></script>
Create an object.
var tvKey = new Common.API.TVKeyValue();
Use known member variable and method.
alert(tvKey.KEY_LEFT);
5.3. TVKeyValue
TVKeyValue
An object that defines TV key code.
Library path $MANAGER_WIDGET/Common/API/TVKeyValue.js
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Syntax new Common.API.TVKeyValue()
Parameter None
Return Value TVKeyValue object
Remarks
This is an object having key code used by the TV as a member variable, and identifies
remote control keys pressed by the user by referring to member variables.
(Since Samsung Smart TV version 2.265)
Example
var tvKey = new Common.API.TVKeyValue();
switch (KEY_CODE) {
case tvKey.KEY_LEFT:
// Do something
break;
case tvKey.KEY_RIGHT:
// Do something
break;
default:
break;
}
Members
KEY_TOOLS
KEY_MUTE
KEY_RETURN
KEY_UP
KEY_DOWN
KEY_LEFT
KEY_RIGHT
KEY_WHEELDOWN
KEY_WHEELUP
KEY_ENTER
KEY_INFO
KEY_EXIT
KEY_RED
KEY_GREEN
KEY_YELLOW
KEY_BLUE
KEY_INFOLINK
KEY_RW
KEY_PAUSE
KEY_FF
KEY_PLAY
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KEY_STOP
KEY_1
KEY_2
KEY_3
KEY_4
KEY_5
KEY_6
KEY_7
KEY_8
KEY_9
KEY_0
KEY_EMPTY
KEY_PRECH
KEY_SOURCE
KEY_CHLIST
KEY_MENU
KEY_WLINK
KEY_CC
KEY_CONTENT
KEY_FAVCH
KEY_REC
KEY_EMODE
KEY_DMA
KEY_PANEL_CH_UP
KEY_PANEL_CH_DOWN
KEY_PANEL_VOL_UP
KEY_PANEL_VOL_DOWN
KEY_PANEL_ENTER
KEY_PANEL_SOURCE
KEY_PANEL_MENU
KEY_PANEL_POWER
Methods None
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5.4. Widget
This is an object that has functions needed for desirable operation of an application. A method that
notifies the Application Manager of starting of an application, a method that registers and frees up keys
users want to use, and other methods are contained in this object.
Widget
Object having functions needed for desirable operation of an application
Library path $MANAGER_WIDGET/Common/API/Widget.js
Syntax new Common.API.Widget()
Parameter None
Return Value Widget object
Remarks (Since Samsung Smart TV version 2.265)
Example var widgetAPI = new Common.API.Widget();
widgetAPI. sendReadyEvent();
Members None
Methods
sendReadyEvent
sendExitEvent
sendReturnEvent
blockNavigation
putInnerHTML
getChannelWidgetListPath
getSearchWidgetListPath
runSearchWidget
5.4.1. sendReadyEvent()
sendReadyEvent
Notifies the Application Manager that the application is ready to be displayed. This event should be passed
to display and run the application on the screen.
Syntax sendReadyEvent()
Parameter None
Return Value None
Remarks (Since Samsung Smart TV version 2.265)
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Example var widgetAPI = new Common.API.Widget();
widgetAPI.sendReadyEvent();
Enumeration None
5.4.2. sendExitEvent()
sendExitEvent
Brings the same effect as pressing the exit key. Stops the application and goes back to the TV screen.
Syntax sendExitEvent()
Parameter None
Return Value None
Remarks (Since Samsung Smart TV version 2.265)
Example var widgetAPI = new Common.API.Widget();
widgetAPI.sendExitEvent ();
Enumeration None
5.4.3. sendReturnEvent()
sendReturnEvent
Brings the same effect of pressing the Return key. Finishes the application and takes you to the Application
Manager.
Syntax sendReturnEvent()
Parameter None
Return Value None
Remarks (Since Samsung Smart TV version 2.265)
Example var widgetAPI = new Common.API.Widget();
widgetAPI.sendReturnEvent ();
Enumeration None
5.4.4. blockNavigation()
blockNavigation
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Key event cannot be forced to return.
Syntax blockNavigation(keyEvent)
Parameter keyEvent: Key event
Return Value None
Remarks
KEY_RETURN and KEY_EXIT events forcibly close the operating application. The func
prevents forced closure and keep being executing.
(Since Samsung Smart TV version 2.265)
Example
function keyDown () {
switch(event.keyCode) {
case this.tvKey.KEY_LEFT:
// Do something
break;
case this.tvKey.KEY_RIGHT:
// Do something
break;
case this.tvKey.KEY_RETURN:
widgetAPI.blockNavigation(event);
// Not terminated
break;
case this.tvKey.KEY_EXIT:
// Terminated by force
break;
default:
break;
}
}
Enumeration None
5.4.5. putInnerHTML()
putInnerHTML
innerHTML method to fix memory issues.
Syntax putInnerHTML(div, contents)
Parameter div: Div Element to use innerHTML
contents: Things to insert in innerHTML
Return Value None
Remarks
Required to use this method because repetitive use of innerHTML can occur memory
issues.
(Since Samsung Smart TV version 2.265)
Example var widgetAPI = new Common.API.Widget();
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var divElement = document.getElementById("divID");
var contents = "Text to change";
widgetAPI.putInnerHTML(divElement, contents);
Enumeration None
5.4.6. getChannelWidgetListPath()
getChannelWidgetListPath
Method that brings the path of xml file having the child application list of the current channel bound
application
Syntax getChannelWidgetListPath()
Parameter None
Return Value string : xml file path
Remarks
This method is used when the channel bound application needs information on the
currently installed child application.
(Since Samsung Smart TV version 2.265)
Example var widgetAPI = new Common.API.Widget();
var xmlPath = widgetAPI.getChannelWidgetListPath();
Enumeration None
5.4.7. getSearchWidgetListPath()
getSearchWidgetListPath
Method that brings the path of xml file having the list of applications related
Syntax getSearchWidgetListPath()
Parameter None
Return Value string : xml file path
Remarks
This method is used when a search tag in config.xml requires information on an
application whose search tag is set as „y‟.
(Since Samsung Smart TV version 2.265)
Example var widgetAPI = new Common.API.Widget();
var xmlPath = widgetAPI.getSearchWidgetListPath();
Enumeration None
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5.4.8. runSearchWidget()
runSearchWidget
Method called when executing another application in an application
Syntax runSearchWidget ()
Parameter appID : The application ID you intend to operate
extraInfo : The string that transferred to the executing application
Return Value None
Remarks
This method is used when the channel bound application requires information on the
installed child application at present.
(Since Samsung Smart TV version 2.265)
Example var widgetAPI = new Common.API.Widget();
widgetAPI.runSearchWidget(“111011000001”,”key1=value1&key2=value2”);
Enumeration None
5.4.9. checkSapTicket ()
checkSapTicket
Method called when checking to have the valid ticket for current logged-in user.
Syntax checkSapTicket ()
Parameter None
Return Value None
Remarks
You should register event handler for passing the return value.
If you have valid ticket, the return value is “stat=ok&ticket=686a8281-e952-4dcc-
a67b-57e8f92e5530”
Otherwise, it is “stat=fail&ticket=null”.
(Since Samsung Smart TV version 3.037)
Example
// Register Event Handler
curWidget.onWidgetEvent = AAAA;
var widgetAPI = new Common.API.Widget();
widgetAPI.checkSapTicket();
function AAAA(event){
if( event.type == Common.API.EVENT_ENUM.PNS_CHECK_TICKET){
// The return value is event.data.
// TODO
}
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}
Enumeration None
5.4.10. requestSapTicket ()
requestSapTicket
Method called when requesting new Sap Ticket for Application Server.
Syntax requestSapTicket ()
Parameter None
Return Value None
Remarks
You should register event handler for passing the return value.
If new ticket is generated normally, the return value is “stat=ok&ticket=686a8281-
e952-4dcc-a67b-57e8f92e5530”
Otherwise, it is “stat=fail&ticket=null”.
(Since Samsung Smart TV version 3.037)
Example
// Register Event Handler
curWidget.onWidgetEvent = AAAA;
var widgetAPI = new Common.API.Widget();
widgetAPI.requestSapTicket();
function AAAA(event){
if( event.type == Common.API.EVENT_ENUM.PNS_REQUEST_TICKET){
// The return value is event.data.
// TODO
}
}
Enumeration None
5.5. Plugin
The Application Manager provides a wrapper class that allows you to use some plugin functions in more
convenient ways. If you want to take advantage of this class, just insert objects needed for use of plugins
in the index.html document. Then, the Application Manager will give you an appropriate class method.
Plugin
Object that is wrapped for convenient use of plugins
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Library path $MANAGER_WIDGET/Common/API/Plugin.js
Syntax new Common.API.Plugin()
Parameter None
Return Value Plugin object
Remarks (Since Samsung Smart TV version 2.265)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.setOnWatchDog();
Members None
Methods
Object ID : pluginObjectTVMW
setOnWatchDog
setOffWatchDog
registKey
unregistKey
registIMEKey
unregistIMEKey
registAllKey
unregistAllKey
registFullWidgetKey
registPartWidgetKey
Object ID : pluginObjectVideo
setOnOSDState
setOffOSDState
Object ID : pluginObjectVideo
setOnOSDState
setOffOSDState
Object ID : pluginObjectNNavi
SetBannerState
ShowTools
setOnIdleEvent
setOffIdleEvent
setOnScreenSaver
setOffScreenSaver
Object ID : pluginObjectAppCommon
isViewerKey
Object list pluginObjectTVMW
<OBJECT id='pluginObjectTVMW' border=0 classid='clsid:SAMSUNG-INFOLINK-TVMW'
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style='opacity:0.0;background-color:#000000;width:0px;height:0px;'></OBJECT>
pluginObjectVideo
<OBJECT id='pluginObjectVideo' border=0 classid='clsid:SAMSUNG-INFOLINK-VIDEO'
style='opacity:0.0;background-color:#000000;'></OBJECT>
pluginObjectNNavi
<OBJECT id='pluginObjectNNavi' classid='clsid:SAMSUNG-INFOLINK-NNAVI'
style='opacity:0.0;background-color:#000000;width:0px;height:0px;'></OBJECT>
pluginObjectAppCommon
<OBJECT id='pluginObjectAppCommon' classid='clsid:SAMSUNG-INFOLINK-APPCOMMON'
style='opacity:0.0;background-color:#000000;width:0px;height:0px;'></OBJECT>
5.5.1. setOnWatchDog()
setOnWatchDog
Turns on the Watch dog function.
Syntax setOnWatchDog()
Parameter None
Return Value None
Remarks (Since Samsung Smart TV version 2.265)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.setOnWatchDog();
Enumeration None
5.5.2. setOffWatchDog()
setOffWatchDog
Turns off the Watch dog function.
Syntax setOffWatchDog()
Parameter None
Return Value None
Remarks (Since Samsung Smart TV version 2.265)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.setOffWatchDog();
Enumeration None
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5.5.3. setOnOSDState()
setOnOSDState
Sets the area where OSD is protected.
Syntax setOnOSDState(left, top, width, height)
Parameter
left : left coordinate of the area
top : top coordinate of the area
width : width of the area
height : height of the area
Return Value None
Remarks (Since Samsung Smart TV version 2.265)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.setOnOSDState(0,0, 330, 540);
Enumeration None
5.5.4. setOffOSDState()
setOffOSDState
Cancels the previously set OSD area.
Syntax setOffOSDState(left, top, width, height)
Parameter
left : left coordinate of the area
top : top coordinate of the area
width : width of the area
height : height of the area
Return Value None
Remarks (Since Samsung Smart TV version 2.265)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.setOffOSDState(0,0, 330, 540);
Enumeration None
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5.5.5. registKey()
registKey
Lets the Application Manager register specific key
Syntax registKey(pNumKeyCode)
Parameter pNumKeyCode: key code
Return Value None
Remarks
Registration/Unregistration of keys should be done after window.onshow event. Refer
to Chap. 6.4 How to use keys on remote control for more details.
(Since Samsung Smart TV version 2.265)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.registKey(tvKey.KEY_ TOOLS);
Enumeration None
5.5.6. unregistKey()
unregistKey
Lets the Application Manager unregister specific key
Syntax unregistKey(pNumKeyCode)
Parameter pNumKeyCode: key code
Return Value None
Remarks
Registration/Unregistration of keys should be done after window.onshow event. Refer
to Chap. 6.4 How to use keys on remote control for more details.
(Since Samsung Smart TV version 2.265)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.unregistKey(tvKey.KEY_ TOOLS);
Enumeration None
5.5.7. registIMEKey()
registIMEKey
Lets the Application Manager register IME key
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Syntax registIMEKey()
Parameter None
Return Value None
Remarks
Registers number keys from 0 to 9, „-„(hyphen), and previous channel key used in
entering IME.
Registration/Unregistration of keys should be done after window.onshow event. Refer
to Chap. 6.4 How to use keys on remote control for more details.
(Since Samsung Smart TV version 2.265)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.registIMEKey();
Enumeration None
5.5.8. unregistIMEKey()
unregistIMEKey
Lets the Application Manager unregister IME key
Syntax unregistIMEKey()
Parameter None
Return Value None
Remarks
Unregisters number keys from 0 to 9, „-„(hyphen), previous channel key used in
entering IME.
Registration/Unregistration of keys should be done after window.onshow event. Refer
to Chap. 6.4 How to use keys on remote control for more details.
(Since Samsung Smart TV version 2.265)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.unregistIMEKey();
Enumeration None
5.5.9. registAllKey
registAllKey
Lets the Application Manager register all keys
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Syntax registAllKey()
Parameter None
Return Value None
Remarks
Registers all keys
Registration/Unregistration of keys should be done after window onshow event. Refer
to Chap. 6.4 How to use keys on remote control for more details.
(Since Samsung Smart TV version 2.265)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.registAllKey();
Enumeration None
5.5.10. unregistAllKey()
unregistAllKey
Lets the Application Manager unregister all keys
Syntax unregistAllKey()
Parameter None
Return Value None
Remarks
Unregisters all keys
Registration/Unregistration of keys should be done after window onshow event. Refer
to Chap. 6.4 How to use keys on remote control for more details.
(Since Samsung Smart TV version 2.265)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.unregistAllKey();
Enumeration None
5.5.11. registFullWidgetKey()
registFullWidgetKey
Lets the Application Manager register specific key group
Syntax registFullWidgetKey()
Parameter None
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Return Value None
Remarks
Registers keys for fullwidget
Registration/Unregistration of keys should be done after window onshow event. Refer
to Chap. 6.4 How to use keys on remote control for more details.
(Since Samsung Smart TV version 2.265)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.registFullWidgetKey();
Enumeration None
5.5.12. registPartWidgetKey()
registPartWidgetKey
Lets the Application Manager register specific key group
Syntax registPartWidgetKey ()
Parameter None
Return Value None
Remarks
Registers keys for part widget
Registration/Unregistration of keys should be done after window onshow event. Refer
to Chap. 6.4 How to use keys on remote control for more details.
(Since Samsung Smart TV version 2.265)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI. registPartWidgetKey ();
Enumeration None
5.5.13. SetBannerState()
SetBannerState
A function using when you want to put volume and channel OSD with the application.
Syntax SetBannerState (nState)
Parameter
nState : Defined value on OSD you want to bring with the application.
PL_NNAVI_STATE_BANNER_NONE = 0;
PL_NNAVI_STATE_BANNER_VOL = 1;
PL_NNAVI_STATE_BANNER_VOL_CH = 2;
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Return Value None
Remarks
When you intend to bring up volume OSD on the screen, volume key value should be
registered. So does channels. See an example.
(Since Samsung Smart TV version 2.265)
Example
var PL_NNAVI_STATE_BANNER_NONE = 0;
var PL_NNAVI_STATE_BANNER_VOL = 1;
var PL_NNAVI_STATE_BANNER_VOL_CH = 2;
var pluginAPI = new Common.API.Plugin();
var tvKey = new Common.API.TVKeyValue();
pluginAPI.unregistKey(tvKey.KEY_VOL_UP);
pluginAPI.unregistKey(tvKey.KEY_VOL_DOWN);
pluginAPI.SetBannerState(PL_NNAVI_STATE_BANNER_VOL);
Enumeration None
5.5.14. ShowTools()
ShowTools
A function to bring popup windows for screen and sound adjustment.
Syntax ShowTools (nTool)
Parameter
nTool: Defined value on a popup window you want to bring.
0 : Sound Setting popup
1 : Picture Setting popup
Return Value None
Remarks
You can see the point when the popup window is closed by signing up for
curWidget.onWidgetEvent.
(Since Samsung Smart TV version 2.265)
Example
curWidget.onWidgetEvent = function(){
// a code that will be executed after closing the popup window
}
var pluginAPI = new Common.API.Plugin();
pluginAPI.ShowTools(1);
Enumeration None
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5.5.15. setOnIdleEvent()
setOnIdleEvent
The function to set idle on to close the application in case that there is no input for a certain time
Syntax setOnIdleEvent()
Parameter None
Return Value None
Remarks
1. Default is set as „Idle ON‟.
2. Recall the function when idle process is required after calling setOffIdleEvent
method.(ex. When closing image playing)
(Since Samsung Smart TV version 2.265)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.setOnIdleEvent();
Enumeration None
5.5.16. setOffIdleEvent()
setOffIdleEvent
The function to set idle off in order not to close the application despite no input for a certain time
Syntax setOffIdleEvent()
Parameter None
Return Value None
Remarks
1. Default is set as „idle ON‟.
2. Setting Idle off is needed in case of watching clips for a long time
(Since Samsung Smart TV version 2.265)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.setOffIdleEvent();
Enumeration None
5.5.17. setOnScreenSaver()
setOnScreenSaver
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The function to set on screen saver
Syntax setOnScreenSaver()
Parameter None
Return Value None
Remarks Screensaver is off when the application is closed.
(Since Samsung Smart TV version 2.265)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.setOnScreenSaver();
Enumeration None
5.5.18. setOffScreenSaver()
setOffScreenSaver
The function to set off screen saver
Syntax setOffScreenSaver()
Parameter None
Return Value None
Remarks Available after calling setOnScreenSaver
(Since Samsung Smart TV version 2.265)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.setOffScreenSaver();
Enumeration None
5.5.19. isViewerKey()
isViewerKey
The function to decide whether the key value currently entered is for TV View or application
Syntax isViewerKey (pKeyCode)
Parameter pKeyCode: entered remote control key value at present
Return Value True - Key processing by TV Viewer
False – Key processing by Application
Remarks When the TV viewer needs to proceed the entered remote control keys, the inputted
value in TV viewer is automatically transferred
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(Since Application Manager 2.266)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.isViewerKey(KEY_ENTER)
Enumeration None
5.5.20. setOnFullScreen ()
setOnFullScreen
The function to set on full screen.
Syntax setOnFullScreen()
Parameter None
Return Value None
Remarks In case of <fullwidget>y</fullwidget>, it is not necessary to call this function.
(Since Samsung Smart TV version 2.306)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.setOnFullScreen();
Enumeration None
5.5.21. setOffFullScreen()
setOffFullScreen
The function to set off full screen.
Syntax setOffFullScreen()
Parameter None
Return Value None
Remarks Available after calling setOnFullScreen.
(Since Samsung Smart TV version 2.306)
Example var pluginAPI = new Common.API.Plugin();
pluginAPI.setOffFullScreen();
Enumeration None
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5.6. CImageViewer
Introduces a common module „ClmageViewer‟ and describes how to use it
5.6.1. CImageViewer?
CImageViewer is a common module that enables JPEG files to be played in SAMSUNG DTV. With this
module, Images can be displayed on DTV big screen with high resolution,1920 x 1080 pixels. In addition,
images are marked by scaling the size you need at the location you prefer, and transition effect in various
manners is available.
If you want to utilize CImageViewer, TV source should be designated as a Media source. Source Transition
can be made by setting <srcctl> item to „y‟ or through SetMediaSource() of TVMW Plugin.
5.6.2. Specifications
Features Description
Resolution
1920 x 1080 pixels
Images are displayed in Media source. The display pixel of the
application is marked as 960 x 540 pixels, but that of the displaying
image in media source is marked as 1920 x 1080 pixels.
Supported file format JPEG only
Scaling range
Designate the area where an image should be displayed and play it, the
image is scaled in observance of the area you set. At this stage,
resolution should be set over 300 pixels. If it is less than 30 pixels,
images can be distorted or flicking.
Transition Effects
Total 10 modes are provided.
(NONE, FADE1, FADE2, BLIND, SPIRAL, CHECKER, LINEAR, STAIRS, WIPE,
RANDOM)
Refer to 5.6.4. Transition Effect for more information.
5.6.3. Basic Instructions
Appoints locations of images and displays images by scaling
① Include common module
common module is included by putting the code below in the <head> of index.html
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<script type="text/javascript" language="javascript"
src="$MANAGER_WIDGET/Common/API/CImageViewer.js"></script>
② Create instance
Create ImageViewer instance.
var ImageViewer = new CImageViewer('Common ImageViewer');
③ Initialize ImageViewer
Set the area where images are displayed and functions which will execute each event. show() method
shows the area managed by ImageViewer on screen.
Area designation via setFrameArea() method is executed based on basic resolution (960x540 pixel). The
appointed area operates at 1920x1080 pixel.
ImageViewer.setFrameArea(100, 100, 300, 300);
ImageViewer.setOnNetworkError(function(){
alert('Network error occurs!');
});
ImageViewer.show();
④ Play images
Play images. Images remain original proportion at the designated areas and they are indicated by scaling.
ImageViewer.play('$WIDGET/picture.jpg', 640, 480);
⑤ Closing the App
When the App is closed, ImageViewer should be initialized with calling destroy() method. In case that the
application is closed without initialization while playing images in ImageViewer, fatal problems such as TV
system pause might occur and there could be toubles using ImageViewer in other applications.
// Run ImageViewer.destroy() method on <body>'s onunload function
ImageViewer.destroy();
5.6.4. Transition Effect
The function to give special effects. The effect applies to the whole screen not to the image area.
Following describes the process to transfer page 1 to page 2. There are 10 modes available.
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Effect Description
NONE Transition without effects.
FADE1 Page 1 is faded out and page 2 is faded in.
FADE2 Page 1 is white faded out and page2 is faded in.
BLIND Page 2 appears with blind effect.
SPIRAL Page 2 appears spinning clockwise from the center.
CHECKER Page 2 appears gradually in a grid pattern.
LINEAR Each line of Page 1 is replaced with the lines of page 2 from left to right.
STAIRS The page is transformed to page 2 gradually in the shape of steps from upper left
to lower right.
WIPE Page transition happens when the central is spread up and down, or upper and
down sides are reached to the center.
RANDOM Effects above except for NONE are operated randomly.
It is available to refer to variables of Effect members in an instance of CImageViewer or CImageViewer
class.
var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer.Effect.FADE2
or
CImageViewer.Effect.FADE2
5.6.4.1. Action Principles of Slideshow
Slideshow operates as stated below.
Display the first image Prepare the second image Display the second image Prepare the third
image …
Play the first image through .play(). Buffering complete event occurs while playing, afterward,
Rendering complete event which informs that the image are thoroughly scattered on screen takes
place. Then, call prepareNext() to prepare next image. The screen has not been changed because
preparation is proceeded on background. When the image is ready to show, Buffering complete event
informs that. Since this point, Transition Effect is available to see by calling .showNow(). After the
Effect is completed, Rendering complete event occurs again to proceed next image.
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5.6.4.2. How to Realize Transition Effect
An image display is terminated, the next image is loaded. When loading is completed, Transition effect
starts to play. After the Transition effect, the next image is loaded. The points when image display is
ended and loading is completed are acknowledged by the Event loaded from ImageViewer.
① ImageViewer Setup
Full screen is designated as area of use for ImageViewer. Register a function to find out the points an
image started to be loaded and playing is over.
ImageViewer = new CImageViewer(„Common ImageViewer');
ImageViewer.setFrameArea(0, 0, 960, 540);
ImageViewer.setOnBufferingComplete(function(){
alert('Image ready!');
});
ImageViewer.setOnRenderingComplete(function(){
alert('You can prepare next image!');
});
② Slideshow Mode Setup
There are many differences in internal process sequences between general image display and image
display by Transition effect. Set a method notifying slideshow mode to enable ImageViewer to execute
Transition effect.
ImageViewer.startSlideshow();
③ Play the first image
The first image is played with play() method. Factors such as width and height except URL do not need to
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be provided because it is not available to designate location of images in slideshow mode.
ImageViewer.play('$WIDGET/picture_1.jpg', 640, 480);
④ Prepare to load the next image
The next image is loaded after the first image is displayed. The moment when the first playing is ended is
equal to the point when the registered function via setOnRenderingComplete() begins to execute. Then,
location of the image and effects you intend to apply are settled by prepareNext(). After a while,
Buffering Completed, which means that the next image is ready for display, occurs.
ImageViewer.prepareNext('$WIDGET/picture_2.jpg ', ImageViewer.Effect.FADE2);
⑤ Start Effect
Transition effect starts to play once showNow() is called. When Effect animation is completed, Rendering
Complete event, which indicates completion of image display, takes place. Successive Transition effect
can be realized by reiterating process ④. Be sure to remember that calling showNow() should be made
after Buffering Complete event.
⑥ End slideshow mode
Call endSlideshow() to sneak out of slideshow mode. This method enables next images to display normally.
ImageViewer.endSlideshow();
5.6.4.3. Slideshow Mode and Restrictions
There are several restrictions in using Transition effect.
Scaling is not available.
Transition effect applies to the whole screen, so it is not available to operate with scaling simultaneously.
Images should be palyed in full screen (960x540 pixels). Set as shown below.
setFrameArea(0, 0, 960, 540);
Images are displayed at the center of screen in original size. If the size of original image is larger than
width 1920 pixels and height 1080 pixels, the image will be downscaled in accordance with aspect ratio,
and displayed in the center screen.
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Do not execute other methods while operating Transition effect.
If other methods are operated while proceeding Transition effect, several problems occur such as troubles
on image transition. It is recommended that other operations be done after Rendering complete event
indicating that the effect is over.
Hardware restrictions
SAMSUNG DTV has several models, but some of them could not support Transition effect due to hardware
restrictions. CImageViewer provides isEffectAvailable() method to check the availability.
5.6.5. Events
ImageViewer loads various events in order to control image display more precisely. You can operate events
after registering a function to the necessary Event.
Event Description Function
Buffering start
If the image you intend to play exists on the internet, this
occurs when the image starts to be loaded actually after
successful connection with server.
setOnBufferingStart()
Buffering
complete
This happens when the image is ready to display after
loading. setOnBufferingComplete()
Rendering
complete
This occurs when an image is completely displayed on the
screen. In case of using Transition effect, this happens
when Effect animation has been completed.
setOnRenderingComplete()
Network error This appears in case that image URL Is not accessed
normally. setOnNetworkError()
Render error This takes place when image decoding and rendering are
failed. setOnRenderError()
5.6.6. Play local files
ImageViewer displays images in application or USB as well as on the Internet. A special path starting with
„$‟ is necessary to display images in application or USB.
5.6.6.1. Play Images in an Application
The string „$WIDGET‟ indicates a directory containing an application. Images in the application can be
played by sending strings as shown below to ImageViewer.play().
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ImageViewer.play('$WIDGET/picture_2.jpg ', 640, 480);
5.6.6.2. Play images in USB
The string '$USB_DIR' indicates USB. To display images in USB, the location where the USB is mounted in TV
is needed because TV has plural USB ports, and mounting path varies for each USB connection. The
location can be found via Storage Plugin. Refer to Plugin guide for more details on Storage Plugin. Here,
we apply minimum functions to show examples.
① How to figure out mount route
The path to mount USB is found out by Storage plugin. Root directory path of USB is completed by adding
the path mounted by the string „$USB_DIR‟ which indicates USB.
// Plugin object Designated
var eStoragePlugin = document.getElementById('pluginObjectStorage');
// Provided that one USB is connected
var deviceId = eStoragePlugin.GetUSBDeviceID(0);
// Provided that USB has one partition
var mountPath = eStoragePlugin.GetUSBMountPath(deviceId, 0);
var USBRootPath = '$USB_DIR/' + mountPath; // USB root directory path
Your TV has more than two USB ports. If you need to control more than two USBs or use USB with divided
partitions, other functions in Storage plugin are required.
② How to create file routes
File information in USB is available, using readDir() API of App Engine. readDir() puts file information on
the path in an array and returns it. Below shows an example to refer to whether it is a directory or not
and file name. Refer to 8. File API for more information.
var fileSystemObj = new FileSystem(); // App Engine API
var dirs = new Array();
var files = new Array();
var data = fileSystemObj.readDir(USBRootPath); // readDir() returns the array of file information
for (var i = 0; i < data.length; i++) {
if (data[i].isDir) {
dirs.push(data[i].name);
}
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else {
files.push(data[i].name);
}
}
The whole path of image files in USB is created by the file information figured above.
…
var USBImageFile = USBRootPath +'/'+ directory +'/'+ file;
The actual variable of USBImageFile could be the same as below.
'$USB_DIR/sda1/myphotos/picture_2.jpg'
③ Image files in USB are displayed.
ImageViewer.play(USBImageFile);
5.6.7. Reference
5.6.7.1. CImageViewer
CImageViewer
A class to play images
Library path $MANAGER_WIDGET/Common/API/CImageViewer.js
Syntax New CImageViewer(objectName:String)
Parameter
objectName:String
Includes names to distinguish generated objects. The debug message which occurred
from ImageViewer has the name on it.
Return Value CImageViewer object
Remarks
ImageViewer provided by TV in reality is only one. Therefore, it is urged that one
object of CImageViewer be created.
If an image is played via ImageViewer, destroy() should be called when closing the
application.
(Since Application Manager 2.269)
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Example var ImageViewer = new CImageViewer('Common ImageViewer');
Members Effect
Methods
clearScreen
destroy
endSlideshow
getStopFlag
hide
isEffectAvailable
isValidType
play
prepareNext
setDisplayArea
setFrameArea
setOnBufferingComplete
setOnBufferingStart
setOnNetworkError
setOnRenderError
setOnRenderingComplete
show
showNow
startSlideshow
stop
5.6.7.2. Effect
Effect
An object defined by Transition Effect Value
Library path $MANAGER_WIDGET/Common/API/CImageViewer.js
Syntax var ImageViewer = new CImageViewer(objectName:String);
ImgeViewer.Effect.VALUE
Parameter None
Return Value None
Remarks INIT is for internal action, do not us it.
(Since Application Manager 2.269)
Example var ImageViewer = new CImageViewer('Common ImageViewer');
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ImageViewer.Effect.FADE1;
Members
NONE
FADE1
FADE2
BLIND
SPIRAL
CHECKER
LINEAR
STAIRS
WIPE
RANDOM
Methods None
5.6.7.3. clearScreen()
clearScreen
Deletes images displaying on the page
Syntax ImageViewer.clearScreen()
Parameter None
Return Value None
Remarks stop() is not able to remove the playing image. To delete the image, call clearScreen.
(Since Application Manager 2.269)
Example var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer.clearScreen();
Enumeration None
5.6.7.4. destroy()
destroy
Pauses the playing image and initializes ImageViewer
Syntax ImageViewer.destroy()
Parameter None
Return Value None
Remarks
If you have used ImageViewer, this function should be called when closing the
application. It is recommended that the function registered onunload function of
<body> element call this method. The function is called when the application ends.
(Since Application Manager 2.269)
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Example var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer.destroy ();
Enumeration None
5.6.7.5. endSlideshow()
endSlideshow
Ends slideshow mode
Syntax ImageViewer.endSlideshow()
Parameter None
Return Value None
Remarks
Call startSlideshow() to enter slideshow mode which includes transition effect.
prepareNext() and showNow() work only in slideshow mode.
(Since Application Manager 2.269)
Example
var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer.startSlideshow();
… // Use transition effect
ImageViewer.endSlideshow();
Enumeration None
5.6.7.6. getStopFlag()
getStopFlag
Confirms that ImageViewer is stopped or not
Syntax ImageViewer.getStopFlag();
Parameter None
Return Value Boolean
If the ImageViewer is stopped, return „true‟, if it is operating, return „false‟.
Remarks (Since Application Manager 2.269)
Example var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer. getStopFlag();
Enumeration None
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5.6.7.7. hide()
hide
Hides areas managed by ImageViewer
Syntax ImageViewer.hide();
Parameter None
Return Value None
Remarks (Since Application Manager 2.269)
Example
var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer.show();
… // Play images!
ImageViewer.stop();
ImageViewer.hide();
Enumeration None
5.6.7.8. isEffectAvailable()
isEffectAvailable
Checks if Transition effect is available
Syntax ImageViewer.isEffectAvailable();
Parameter None
Return Value
Boolean
If user settings are feasible for Transition effect, return „true‟, if not, return „false‟.
(Since Application Manager 2.269)
Remarks Some models do not support Transition effect due to hardware restrictions. In these
models, Effect animation is not workable even in slideshow mode.
Example var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer.isEffectAvailable();
Enumeration None
5.6.7.9. play()
Play
Plays images
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Syntax ImageViewer.play(url:String, width:Number, height:Number);
Parameter
url:String
Available to display image URL, images in Application and USB
width:Number
Size unit of an image (width, height) is pixel. The image is scaled based on the pixels
and displayed in the designated area by setFrameArea(). Slideshow mode does not
need this.
height:Number
Size unit of an image (width, height) is pixel. The image is scaled based on the pixels
and displayed in the designated area by setFrameArea(). Slideshow mode does not
need this.
Return Value (Since Application Manager 2.269)
Remarks Playable image type is JPEG only.
Example
var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer.setFrameArea(50,50,480,320);
ImageViewer.play(image_url, image_width, image_height);
Enumeration None
5.6.7.10. prepareNext()
prepareNext
Method to load the next image to execute Transition effect in slideshow mode
Syntax ImageViewer.prepareNext(url:string, effect:ImageViewer.Effect);
Parameter
url:string
Available to display image URL, images in Application and USB
effect:ImageViewer.Effect
Refer to Transition effect you intend to apply and Effect variables in the instance of
CImageViewer.
Return Value None
Remarks
When this method is called, an image is started to be loaded. Effect animation is
shown by calling showNow() after Buffering Complete event.
Transition effect might not be supported by several models because of hardware
restrictions. Use isEffectAvailable() to find out that Transition effect is available in
your TV.
(Since Application Manager 2.269)
Example var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer.setFrameArea(0,0,960,540);
ImageViewer.startSlideshow();
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ImageViewer.play(firstImage, 300, 400);
// after Rendering complete event
ImageViewer.prepareNext(NextImage, ImageViewer.Effect.FADE1);
// after Buffering complete event
ImageViewer.shwoNow();
…
// after finishing slideshow
ImageViewer.endSlideshow();
Enumeration None
5.6.7.11. setFrameArea()
setFrameArea
Sets the area where images are marked. Images are displayed within the area.
Syntax ImageViewer.setFrameArea(left:Number, top:Number, width:Number, height:Number);
Parameter
left:Number
Left coordinate of the area
top:Number
Top coordinate of the area
width:Number
Width of the area
height:Number
Height of the area
* Unit is pixel.
Return Value None
Remarks
For instance, if the image is set as setFrameArea(0,0,225,200), the upper left area of
TV screen is transferred to Media source, Images at 450 x 400 pixels are realized
remaining intact.
If an image you intend to display is larger than the standard, it is scaled in
accordance with aspect ratio and displayed in the area.
(Since Application Manager 2.269)
Example
var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer.setFrameArea(0,0,480,320);
ImageViewer.play(image_url, image_width, image_height);
Enumeration None
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5.6.7.12. setOnBufferingComplete()
setOnBufferingComplete
Registers a function executed in case of Buffering complete event while loading an image
Syntax ImageViewer.setOnBufferingComplete(callback:function);
Parameter callback:function
The function executed in the event of Buffering complete event
Return Value None
Remarks
Buffering complete event occurs after image loading. If this event takes places after
calling prepareNext(), it means that the image is ready for Transition effect. At this
stage, calling showNow() begins effect animation.
(Since Application Manager 2.269)
Example
var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer.setOnBufferingComplete(function(){
// blah blah
});
Enumeration None
5.6.7.13. setOnBufferingStart()
setOnBufferingStart
Registers a function executed in case of Buffering start event
Syntax ImageViewer.setOnBufferingStart(callback:function);
Parameter callback:function
The function executed in the event of Buffering start event
Return Value None
Remarks
If the image you intend to play is on the Internet, this event happens when starting to
load actual image data after connecting to the server successfully.
(Since Application Manager 2.269)
Example
var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer.setOnBufferingStart(function(){
// blah blah
});
Enumeration None
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5.6.7.14. setOnNetworkError()
setOnNetworkError
Registers a function executed in case of Network error event
Syntax ImageViewer.setOnNetworkError(callback:function);
Parameter callback:function
The function executed in the event of Network error event
Return Value None
Remarks This event occurs in case of network errors while loading images.
(Since Application Manager 2.269)
Example
var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer.setOnNetworkError(function(){
// blah blah
});
Enumeration None
5.6.7.15. setOnRenderError()
setOnRenderError
Registers a function executed in case of Decoding or Rendering error
Syntax ImageViewer.setOnRenderError(callback:function);
Parameter callback:function
The function executed in case of Decoding or Rendering error
Return Value None
Remarks
This event takes place when an error occurs while decoding and rendering after
buffering and when trying playing a format not basically supported.
(Image files except for JPEG)
(Since Application Manager 2.269)
Example
var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer.setOnRenderError(function(){
// blah blah
});
Enumeration None
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5.6.7.16. setOnRenderingComplete ()
setOnRenderingComplete
Registers a function executed in case of Rendering complete event
Syntax ImageViewer.setOnRenderingComplete(callback:function);
Parameter callback:function
The function executed in the event of Rendering complete event
Return Value None
Remarks
This event occurs when the image displays completely on the screen. If Transition
effect is used, the event occurs at the point when Effect animation is ended.
(Since Application Manager 2.269)
Example
var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer.setOnRenderingComplete(function(){
// blah blah
});
Enumeration None
5.6.7.17. show()
Show
Shows area managed by ImageViewer on screen
Syntax ImageViewer.show();
Parameter None
Return Value None
Remarks (Since Application Manager 2.269)
Example
var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer.show();
… // Play images!
ImageViewer.stop();
ImageViewer.hide();
Enumeration None
5.6.7.18. showNow ()
showNow
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Transition effect is begun to play. Loading the image should be ended via prepareNext().
Syntax ImageViewer.showNow();
Parameter None
Return Value None
Remarks
Transition effect is not provided in several models owing to hardware restrictions.
Refer to isEffectAvailable().
Calling prepareNext() starts to load a image. Effect animation is shown by calling
showNow() after Buffering complete event.
(Since Application Manager 2.269)
Example
var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer.setFrameArea(0,0,960,540);
ImageViewer.startSlideshow();
ImageViewer.play(firstImage, 300, 400);
// after Rendering complete event
ImageViewer.prepareNext(NextImage, ImageViewer.Effect.FADE1);
// after Buffering complete event
ImageViewer.shwoNow();
…
// after finishing slideshow
ImageViewer.endSlideshow();
Enumeration None
5.6.7.19. startSlideshow ()
startSlideshow
Starts slideshow mode
Syntax ImageViewer.startSlideshow()
Parameter None
Return Value None
Remarks
If you want to close slideshow mode, call endSlideshow().
Methods such as prepareNext() and showNow() are available only in slideshow mode.
(Since Application Manager 2.269)
Example
var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer.startSlideshow();
… // Use transition effect
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ImageViewer.endSlideshow();
Enumeration None
5.6.7.20. stop ()
stop
Stops image processing
Syntax ImageViewer.stop();
Parameter None
Return Value None
Remarks
This does not get rid of playing images on screen. It stops image processing such as
image loading and Transition effect animation. If you want to remove playing images
from the screen, refer to clearScreen().
(Since Application Manager 2.269)
Example
var ImageViewer = new CImageViewer('Common ImageViewer');
ImageViewer.setFrameArea(50,50,480,320);
ImageViewer.play(image_url, image_width, image_height);
ImageViewer.stop();
Enumeration None
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6. Tips for application developers
This section describes several pieces of information that are useful for application developers.
6.1. Function necessary to be called when you open an application
For an application to be run, it should ask the Application Manager to display itself on the screen. Only
when the Application Manager is requested to do so, it displays the corresponding application on the
screen. Any request should be made through a common module. Call the sendReadyEvent() method of the
Widget object in the common module.
var widgetAPI = new Common.API.Widget(); // Create Common module
widgetAPI.sendReadyEvent(); // Send ready message to Application Manager
6.2. Access point
Whenever you open an application, the App Engine reads the index.html document. If you implement an
application by selecting an application and clicking Enter in the Application Manager, the browser starts to
read the index.html document. Register a JavaScript function in the „onload‟ property so that when the
<body> load event occurs, the application is started. The application must calls sendReadyEvent() of the
Widget object in the common module.
<body onload="Main.onLoad();">
6.3. Handling remote control key events
If any button on the remote control is pressed, the „keydown‟ event occurs. This event is passed to an
element receiving focus at the point of time when the event occurs. If the element has registered a
function in the „onkeydown‟ property, that function is executed. The function identifies which button is
pressed using event.keyCode.
You should note that an element that is supposed to respond to the „keydown‟ event should be receiving
focus. If there‟s no element receiving focus, there will be no relation on the TV screen even though you
press a remote control button.
All the remote control keys have been defined by member variables of the tvKeyValue object.
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Look at the example below. Insert an element that will have focus in index.html.
<a href='javascript:void(0);' id='anchor' onkeydown='Main.keyDown();'></a>
Create a function that will be registered in the „onkeydown‟ property.
Main.keyDown = function(){ // Key handler
var keyCode = event.keyCode;
alert("Main Key code : " + keyCode);
switch (keyCode) {
case tvKey.KEY_LEFT:
/**
* Code for Left key event!
*/
break;
case tvKey.KEY_RIGHT:
break;
case tvKey.KEY_UP:
break;
case tvKey.KEY_DOWN:
break;
case tvKey.KEY_ENTER:
break;
case tvKey.KEY_RETURN:
break;
}
}
6.4. Remote control keys for applications
If you access an application, the Application Manager registers basic keys relevant to it. A key event
registered in an application occurs, it is loaded to the the application, but a key is not registered in the
application, the event is not loaded to the application. If an unregistered key is executed, TV system
closes the application and TV functions become available. For example, when an application which has no
registered volume key is running, the volume key on remote control is pressed, the working application is
forcibly closed and volume banner appears on TV screen.
Application Manager registers key sets as stated below in order for the application to use keys. When tag
value of <fullwidget> in config.xml is „y‟ and the Full-screen Application keyset is „n‟, Single-wide
Application is registered.
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Full- screen Application Single-wide Application
KEY_VOL_UP
KEY_VOL_DOWN
KEY_MUTE
KEY_TOOLS
KEY_INFO
KEY_EMODE
KEY_DMA
KEY_MENU
KEY_SOURCE
KEY_PRECH
KEY_FAVCH
KEY_CHLIST
KEY_DMA
KEY_TTX_MIX
KEY_GUIDE
KEY_SUBTITLE
KEY_ASPECT
KEY_DOLBY_SRR
KEY_MTS
KEY_PANEL_CH_UP
KEY_PANEL_CH_DOWN
KEY_PANEL_VOL_UP
KEY_PANEL_VOL_DOWN
KEY_PANEL_ENTER
KEY_PANEL_SOURCE
KEY_PANEL_MENU
KEY_1
KEY_2
KEY_3
KEY_4
KEY_5
KEY_6
KEY_7
KEY_8
KEY_9
KEY_0
KEY_WHEELDOWN
KEY_WHEELUP
KEY_RED
KEY_GREEN
KEY_YELLOW
KEY_BLUE
KEY_RW
KEY_PAUSE
KEY_FF
KEY_PLAY
KEY_STOP
KEY_ENTER
KEY_RETURN
KEY_EXIT
KEY_WHEELDOWN
KEY_WHEELUP
KEY_RED
KEY_GREEN
KEY_YELLOW
KEY_BLUE
KEY_RW
KEY_PAUSE
KEY_FF
KEY_PLAY
KEY_STOP
KEY_ENTER
KEY_RETURN
KEY_EXIT
Each application registers/unregisters keys additionally by utilizing registKey() of common module,
„Widget‟. You should be aware of one thing below.
Key registration/unregistration should be done after window.onshow event.
The keys registered/unregistered after window.onshow event are normally processed, but those before
window.onshow event could be ignored. Register a function executed in window.onshow prior to calling
this method because window.onshow event happens after calling sendReadyEvent() of common module,
„Widget‟. Below is an example.
var WIDGET = new Common.API.Widget(); // For sendReadyEvent()
var TVKEY = new Common.API.TVKeyValue(); // Remote controller key value object
var PLUGIN = new Common.API.Plugin(); // Plugin common module
Main.onLoad = function(){
window.onshow = function(){ // register function will be run onshow event
PLUGIN.registKey(TVKEY.KEY_VOL_UP);
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PLUGIN.registKey(TVKEY.KEY_VOL_DOWN);
}
WIDGET.sendReadyEvent();
/**
* code
*/
}
The time of key registration/unregistration after window.onshow event does not matter.
6.5. Closing an application
There are two ways to close your application working on the screen: pressing the Return or Exit button on
the remote control or sending an event to the Application Manager. For the latter way, you use the
sendExitEvent() and sendReturnEvent() functions of the App which is the common module. For more
information, see Ch.5 Common module.
6.6. Prevention of closing the TV screen by the Return or Exit key
Using the Return or Exit key on the remote control, you can close applications. If you press the Return key,
you will be taken to the Application Manager, and if you press the Exit key, you will be taken to the TV
screen. In order to prevent this from happening, when either Return or Exit is pressed, the
blockNavigation() function of the App which is the common module has to be executed. For more
information, see Ch.5 Common modules.
6.7. Additional Information
When an application is run, the Application Manager gives you additional information. The application gets
such information by referring to window.location.search like below. Entered ID/PW via SSO or TV language
information is available.
?country=US&language=1&modelid=Valencia&server=development&remocon=2_35_259&area=USA&product
=1&mgrver=3.000&[email protected]&pw=pxxxx&payload={key1:value2,key2:value2}
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Attribute Value Description
country Country code Country code that has already been assigned. Refer to
Chapter 9.1.
language Language code Replaced with 'lang attribute
modelid Digital TV Model ID Digital TV Model ID
server development | operating server type: Development Server or Operating Server
remocon - No use
area Region Code Region code that has already been assigned. Refer to
chapter9.3.
Id string
Id inputted in SSO. It is passed only when entering application
after sign-in.
It should be used after calling decodeURIComponent().
pw string
Pw inputted in SSO. It is passed only when entering
application after sign-in.
It should be used after calling decodeURIComponent().
product Product code Refer to 9.4. Product Category
mgrver Samsung Smart TV version If your application is enabled after a specific version of
Samsung Smart TV, you should check mgrver.
payload string(JSON)
Extra Information for specific service. It is passed only when
entering application after push notification. It should be used
after calling decodeURIComponent().
6.8. What CSS need to contain
The element created in the margin beyond the maximum TV resolution(960 x 540 pixel) can cause the
display to scroll. All the element margins and paddings in the index.html document should be defaulted to
0 to prevent the matter resulted from going beyond the area. Your CSS should contain the following strings.
body {
margin: 0;
padding: 0;
background-color: transparent;
}
6.9. Loading images in advance
The App Engine decodes images to make them displayed normally on your screen. If the browser continues
to change images that are displayed at a high speed, it may fail to display images on the screen due to
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unfinished decoding process. To avoid this, you can load and keep images before you actually use them. By
doing this, you can save the time for image decoding.
var imagePreloading = new Image();
imagePreloading.src = "Resource/image/largeNFastChange.png";
By doing the above work, you can make the App Engine decode images. For images that have been
decoded once by the browser, they don‟t have to be decoded again later when they are used elsewhere,
so that your TV can display them faster.
6.10. Character of the <input> tag
On App Engine, an object that is created by the <input> tag is not overlapped by other objects. Even if
you use z-index, the <input> object is always over other objects.
6.11. Scroll bar
App Engine provides a scrolling function, but you cannot see
the actual scroll bar on the screen. You can scroll up or down
the content on the screen with buttons on the remote
control when the content needs a larger area than that you
specified before. If you want to see the actual scroll bar on
your TV screen, you should use scrollHeight, scrollTop and
offsetHeight to make an actual scrollbar appear on the
screen.
Put an anchor („<a>‟) in the content you want to scroll up
and down, give it focus and click the up or down button on
the remote control, then you can scroll up or down the content.
(Picture Source: http://sevencapitalsins.wordpress.com/2007/07/04/javascript-smooth-scroll/)
6.12. Making dynamic web pages
If you want to make dynamic web pages, you can use createElement and innerHTML. The createElement
function is the standard method dealing with HTML DOM, but its disadvantage is lower operating speed,
compared with innerHTML. It is recommended to use innerHTML because your applications are run in TVs,
which provide a less optimized operating environment than personal computers.
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6.13. Setting for letter-spacing
The value of letter-spacing in App Engine is defaulted „-1‟. In case of Thai language, letters happen to be
overlapped when the value is „-1‟. Set the value „0‟ to prevent this from happening. Include below codes
to CSS.
* {
letter-spacing: 0px;
}
6.14. Memory management
If you keep changing innerHTML and creating the XMLHttpRequest object on an on, your TV memory runs
out and applications installed in your TV will not run normally. Of course, you have a garbage collector,
but it doesn‟t work fine. Another problem is limited memory resources, compared to PCs. Therefore, if
you want to write „optimized‟ applications that „normally‟ run, you should take additional measures.
6.14.1. Using XMLHttpRequest
If you create and use XHR objects repeatedly in Samsung TVs, you will be faced with a problem of your
applications working in a wrong way. The solution to this problem is set forth in Ch. 4.5 Example for XHR
communication.
6.14.2. Freeing up the memory
If the content in the tag is replaced with the innerHTML property, the corresponding node in the DOM tree
is closed and a new one is created and connected. The closed node remains in the memory. If this
procedure occurs repeatedly, you could face memory full. The solution to this problem is to use the
putInnerHTML() method of the Widget object in the common module. For more information on this
method, refer to Ch. Common modules.
6.15. Watch Dog
SAMSUNG TV periodically checks that the operating applications are working properly. If the application
does not react within 20 sec, it closes the application forcibly. This system is called „Watch dog‟. Watch
dog turns on and off an application, using setOnWatchDog(), setOffWatchDog() method of common module,
„Plugin‟.
In application, Network related operation and big data parsing(ex. Stock ) take more than 20 sec, and this
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will let the Watch dog be forced to close. It is recommended that you turn off Watch dog prior to these
actions. After the actions have been completed, turn on the watch dog again. If you keep Watch dog off,
TV might stop working.
6.16. Prevention for OSD distortion
Images of an application can be distorted if the movie is playing in the background makes too fast
transitions. Operating setOnOSDState(), setOffOSDState() method of common module „Plugin‟ prevents the
trouble. For more details on using the method, see Chapter 5.5. Plugin. This trouble could appear in
Single-wide application and Ticker application. (not in Full-screen application)
6.17. Support CSS text-overflow
App Engine supports CSS1, CSS2. Also, text-overflow which is one of the attributes of CSS3 is supported,
this can make the browser cope with contents over the area efficiently.
6.18. Directions for creating video application
Video application using Player(Plugin) should be closed after the player is stopped. If you end application
without stop playing, critical problem such that TV is paused can occur. The best way to prevent the
problem is to stop Player at the registered function in onunload of <body> tag.
6.19. Using IME
Text input is available via remote control in application. Samsung Smart TV provides a module for utilizing
IME(Input Method Editor). This module enables users to enter languages. For more details, refer to IME
Tutorial manual distributed separately.
6.20. Minimizing initial entry speed of an application
6.20.1. Load Javascript On-Demand
You can save javascript loading time by minimizing javascript in the initial page. On-Demand Javascript
Loading is that Download Javascript when it required, instead of downloading it all in the initial page.
Divide a big javascript file into several javascript file. And then only some Javascript files needed to
generate the initial page amog others. Therefore you can include javascript files minimally in the initial
page. And you can load other javascript files by inserting script element as following.
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Main.onLoad = function(){
var widgetAPI = new Common.API.Widget();
widgetAPI.sendReadyEvent();
setTimeout('IncludeJavascript()',0);
}
function IncludeJavascript(){
var head= document.getElementsByTagName('head')[0];
var script = document.createElement('script'); //script tag creation.
script.type = 'text/javascript';
script.src = 'test.js';
script.onload = function (){…};
head.appendChild(script); //inject a new script element into page
}
6.20.2. Load CSS Background Image On-Demand
App Engine loads an image for an element‟s background style when its background style matching is
invoked. Because deleting background style of some elements not nessasary in initial page can speed the
application loading up. You can apply element‟s background style when it required as follows.
function loadBackgroundImage(eid, url){
document.getElementById(eid).style.backgroundImage = "url("+url+")";
}
function loadCSSImage(){
loadBackgroundImage("Full1", "img/Full_1.png");
loadBackgroundImage("Full2", "img/Full_2.png");
loadBackgroundImage("Full3", "img/Full_3.png");
}
6.20.3. Separation of Main.onLoad functions
If you using setTimeout function properly, a background of initial page can be shown more quikly. Separate
Main.onLoad function into two steps. The first step is to generate background of initial page. The second
step is to do other works not necessary to generate the background of initial page. Following shows this
technique.
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Main.onLoad = function(){
…generate background
var widgetAPI = new Common.API.Widget();
widgetAPI.sendReadyEvent();
setTimeout('Main_onLoad2()',0);
}
function Main_onload2(){
IncludeJavascript(); // refer to 6.20.1
generateDetailPage();
}
6.21. Directions for Dynamic loading of CSS
Dynamic loading of CSS files can be done simply with adding a link nod to <head>. However, CSS should
be loaded prior to composition of DOM tree in App Engine. If DOM is configured with loaded CSS files, CSS
style applies to the DOM. However, CSS is loaded after DOM configuration. CSS style is not applicable to
the DOM. See the example below.
① Add HTML Elements after dynamic loading of CSS
Load red_box.css dynamically, and then add div after three secs. After 3 secs, CSS style is applied, a red
box appears on screen because CSS file is loaded before DOM.
var Main = {
}
var WIDGET = new Common.API.Widget(); // For sendReadyEvent()
Main.onLoad = function() { // The first function
alert("Main : onLoad()");
WIDGET.sendReadyEvent();
includeCSS ('red_box.css');
setTimeout("insertHTML()", 3000);
// insertHTML();
// setTimeout("includeCSS ('red_box.css')", 3000);
}
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function includeCSS(path) {
alert('+=====+ includeCSS +=====+');
var linkNode = document.createElement('link');
linkNode.type = 'text/css';
linkNode.rel = 'stylesheet';
linkNode.href = path;
document.getElementsByTagName('head')[0].appendChild(linkNode);
}
function insertHTML() {
alert('+=====+ insertHTML +=====+');
var divNode = document.createElement('div');
divNode.id = 'red_box';
document.body.appendChild(divNode);
}
* red_box.css
#red_box {
position : absolute;
left: 100px;
top: 100px;
width: 100px;
height: 100px;
border : 3px solid #FF0000;
}
② Add HTML Element and load CSS dynamically.
Get ride of the annotation from Main.onLoad() in the example above. CSS is loaded 3 secs after HML Div
element is added. Therefore, there is no change.
insertHTML();
setTimeout("includeCSS ('red_box.css')", 3000);
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7. App Engine
This section sets forth the browser for running applications provided with Samsung Smart TV, App Engine.
7.1. App Engine?
Stands for Markup engine Platform for Embedded Systems
Browser engine for Consumer Electronics (CE) devices
Controls devices using markup tags and script classes
When an application is displayed and behaves on the screen, its image and text generation should be
controlled and managed. For Samsung TVs with Samsung Smart TV installed, it is App Engine that performs
such work. An application‟s behaviors and displays are made by App Engine. While Internet Explorer and
Firefox are PC-based browsers, App Engine is Samsung TV-based browser.
7.2. Standard Specifications
Supported web standards
HTML4.01, XHTML1.0, XML1.0 Markup language specifications
HTTP1.0/1.1
CSS1, CSS2, CSS TV Profile 1.0
DOM1, DOM2
JavaScript 1.6
Supported image formats
BMP, JPEG, PNG, GIF
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8. File API
This section introduces the file input/output operation system which the Samsung TV application engine
supports.
8.1. File API?
Applications can use the file input/output system supported the Samsung TV application engine.
Applications can store data they get while they are still working and read them anytime they want to
restore the data. All applications perform file input/output operations in a common area. For this reason,
files used in different applications might have same name. To prevent this, create a directory using
application ID(curWidget.id) and work on the file in the directory.
If multiple applications need to share some data, they should do through a file path that they previously
promised to use.
File input/output operations are performed by creating a file system object and calling the interface of
the object.
8.2. API
The following is a list of interfaces that are provided by the Samsung TV application engine. You can use
them in JavaScript.
8.2.1. FileSystem()
FileSystem
Generates file system instance available to be used in an application
Syntax new FileSystem();
Parameter None
Return Value App Engine FileSystem object
Remarks
This function Returns FileSystem instance defined in App Engine. Through this
operation, reading and writing texts are available. Binary format file is not
supported.
Example var fileSystemObj = new FileSystem();
Members None
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Methods
openCommonFile
closeCommonFile
deleteCommonFile
createCommonDir
deleteCommonDir
isValidCommonPath
readLine
writeLine
readlAll
writeAll
readDir
openFile
8.2.2. openCommonFile()
openCommonFile
Opens file in common storage area of an application.
Syntax fileSystemObj.openCommonFile(filePath:String, mode:String)
Parameter
filePath:String
path including a file name.
mode:String
r : Open a file for reading. The file must exist.
w : Create an empty file for writing. If a file with the same name already exists its
content is erased and the file is treated as a new empty file.
a : Append to a file. Writing operations append data at the end of the file. The file is
created if it does not exist.
r+ : Open a file for update both reading and writing. The file must exist.
w+ : Create an empty file for both reading and writing. If a file with the same name
already exists its content is erased and the file is treated as a new empty file.
a+ : Open a file for reading and appending. All writing operations are performed at
the end of the file, protecting the previous content to be overwritten. You can
reposition (fseek, rewind) the internal pointer to anywhere in the file for reading,
but writing operations will move it back to the end of file. The file is created if it
does not exist.
Return Value App Engine file object
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Remarks
With this method, all the applications operate to input and output files in the same
area. Due to this feature, the case that files used in other applications have the same
name happens. It is required to create directories using application ID via
curWidget.id and execute file operations in the directory.
Example
var fileSystemObj = new FileSystem();
var fileObj = fileSystemObj.openCommonFile(curWidget.id + '/testFile.data', 'w');
fileObj.writeAll('something to write.');
fileSystemObj.closeCommonFile(fileObj);
Enumeration None
8.2.3. closeCommonFile()
closeCommonFile
Closes files opened by openCommonFile().
Syntax fileSystemObj.closeCommonFile(fileObj:App Engine file object)
Parameter fileObj: App Engine file object
The file instance returned by openCommonFile()
Return Value Boolean
Remarks Opened files should be closed. Especially, if a file is outputted by methods such as
writeAll(), the output is not saved without closing the file object.
Example
var fileSystemObj = new FileSystem();
var fileObj = fileSystemObj.openCommonFile(curWidget.id + '/testFile.data', 'w');
fileObj.writeAll('something to write.');
fileSystemObj.closeCommonFile(fileObj);
Enumeration None
8.2.4. deleteCommonFile()
deleteCommonFile
Deletes files in Input/Output area
Syntax fileSystemObj.deleteCommonFile(filePath:String)
Parameter filePath:String
path including the name of a file to delete
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Return Value Boolean
Remarks None
Example var fileSystemObj = new FileSystem();
var bResult = fileSystemObj.deleteCommonFile(curWidget.id + '/testFile.data');
Enumeration None
8.2.5. createCommonDir()
createCommonDir
Creates directories in file input/output area
Syntax fileSystemObj.createCommonDir(directoryPath:String)
Parameter directoryPath:String
path including the name of a directory to create
Return Value Boolean
Remarks Creating a directory named curWidget.id to avoid crash between file names in other
applications.
Example var fileSystemObj = new FileSystem();
var bResult = fileSystemObj.createCommonDir(curWidget.id);
Enumeration None
8.2.6. deleteCommonDir()
deleteCommonDir
Deletes directories in file input/out area
Syntax fileSystemObj.deleteCommonDir(directoryPath:String)
Parameter directoryPath:String
path including a name of directory to delete
Return Value Boolean
Remarks None
Example var fileSystemObj = new FileSystem();
var bResult = fileSystemObj.deleteCommonDir(curWidget.id);
Enumeration None
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8.2.7. isValidCommonPath()
isValidCommonPath
Checks if there is a directory
Syntax fileSystemObj.isValidCommonPath(directoryPath:String)
Parameter directoryPath:String
path including a name of directory to confirm its existence
Return Value
Int
0 : JS function failed
1 : valid
2 : invalid
Remarks None
Example
var fileSystemObj = new FileSystem();
var bValid = fileSystemObj.isValidCommonPath(curWidget.id);
if (!bValid) {
fileSystemObj.createCommonDir(curWidget.id);
}
Enumeration None
8.2.8. readLine()
readLine
Reads a line in an opened file
Syntax fileObj.readLine()
Parameter None
Return Value
String
Returns a line ranging to line feed character as a result. If there is nothing to read,
return „null‟.
Remarks None
Example
var fileSystemObj = new FileSystem();
var fileObj = fileSystemObj.openCommonFile(curWidget.id + '/testFile.data', 'r');
var strLine = '';
var arrResult = new Array();
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while((strLine=fileObj.readLine())) {
arrResult.push(strLine);
}
Enumeration None
8.2.9. writeLine()
writeLine
Writes a line in an opened file
Syntax fileObj.writeLine(text:String)
Parameter text:String
text to write in a file
Return Value Boolean
Remarks None
Example
var fileSystemObj = new FileSystem();
var fileObj = fileSystemObj.openCommonFile(curWidget.id + '/testFile.data', 'w');
fileObj.writeLine('something to write.');
fileSystemObj.closeCommonFile(fileObj);
Enumeration None
8.2.10. readlAll()
readAll
Reads whole of the opened file
Syntax fileObj.readAll()
Parameter None
Return Value String
Whole contents of the file
Remarks None
Example
var fileSystemObj = new FileSystem();
var fileObj = fileSystemObj.openCommonFile(curWidget.id + '/testFile.data', 'r');
var strResult = fileObj.readAll();
alert(strResult);
Enumeration None
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8.2.11. writeAll()
writeAll
Writes several lines in the opened file
Syntax fileObj.writeAll(text:String)
Parameter text:String
test to write in a file
Return Value Boolean
Remarks None
Example
var fileSystemObj = new FileSystem();
var fileObj = fileSystemObj.openCommonFile(curWidget.id + '/testFile.data', 'w');
fileObj.writeAll('something to write.');
fileSystemObj.closeCommonFile(fileObj);
Enumeration None
8.2.12. readDir()
readDir
Able to see file information in USB
Syntax fileSystemObj.readDir(directoryPath:String)
Parameter directoryPath:String
Path of a directory that you want to see. Wors only for USB directory
Return Value
Array
The Array containing file information. Each element has file information in a
directory. Able to get information by referring to variables below.
name : file name
isDir : If a file is a directory, „true‟, if not, „false‟
size : File Size (byte)
atime : The time when to open a file or access time to a directory with cd command
mtime : The time when file contents are changed
ctime : The time when file information is changed
If there is no directoryPath, return „false‟.
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Remarks File information in USB can be brought by „$USB_DIR‟. For the way to find out
mounted path of USB, refer to storage plugin of Plugin guide.
Example
var fileSystemObj = new FileSystem();
var usbPath = '$USB_DIR' + usb_mount_path;
var arrFiles = fileSystemObj.readDir(usbPath);
if (arrFiles) {
for (var i=0; i < arrFiles.length; i++) {
alert(arrFiles[i].name);
alert(arrFiles[i].isDir);
}
}
Enumeration None
8.2.13. openFile()
openFile
Opens files in an application
Syntax fileSystemObj.openFile(filePath:String, mode:String)
Parameter
filePath:String
path including a file name
mode:String
r : Open a file for reading. The file must exist.
*only r mode is available.
Return Value
App Engine file object
Returns file object defined in App Engine. Character strings are read By calling
readLine(), readAll() methods that file object has.
Remarks
openCommonFile() enablies files to input and output in common area of all
applications, on the other hand, openFile() is only able to „read‟ files in directory
where an application is installed.
Example
var fileSystemObj = new FileSystem();
var fileObj = fileSystemObj.openFile('index.html', 'r');
alert(fileObj.readAll());
fileSystemObj.closeFile(fileObj);
Enumeration None
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9. Appendix
9.1. Country Code
You can get this code from Application Manager. Refer ch. 6.7, for more details.
Nations Code Nations Code
ALBANIA AL PORTUGAL PT
ANDORRA AD ROMANIA RO
AUSTRIA AT SERBIA RS
BELGIUM BE SLOVAKIA SK
BOSNIA BA SLOVENIA SI
BULGARIA BG SPAIN ES
CIS RU SWEDEN SE
CROATIA HR SWITZERLAND CH
CYPRUS CY UK GB
CZECH CZ AMERICA US
DENMARK DK CANADA CA
FINLAND FI MEXICO MX
FRANCE FR ARGENTINA AR
GERMANY DE CHILE CL
GREECE GR PERU PE
HUNGRARY HU THAILAND TH
ICELAND IS VIETNAM VN
IRELAND IE MALAYSIA MY
ITALY IT INDONESIA ID
LUXEMBOURG LU PHILIPPINES PH
MACEDONIA MK BRAZIL BR
MONTENEGRO ME ALGERIA DZ
NETHERLAND NL MOROCCO MA
NORWAY NO TUNISIA TN
POLAND PL
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9.2. Langauage Code
These codes are obtained from application manager while the application is operating. These are made by
parsing value of window.location.search, and value stated below is delivered to „lang‟ attribute. Tamil
and Hindi are not provided in App Engine 5.1, the code for them is „en-GB‟. Refer to Chapter 6.7 for more
information on window.location.search.
Nations Code Nations Code
Afrikaans af Latvian lv
Amharic am Lithuanian lt
Arabic ar Lithuanian lt
Bulgarian bg Norwegian no
Chinese zh-CN Persian fa
Croatian hr Polish pl
Czech cs Portuguese pt
Danish da Portuguese(America) pt-US
Dutch nl Romany ro
English en Russian ru
English(GB) en-GB Serbian sr
Estonian et Slovak sk
Finnish fi Spanish es
French fr Spanish(America) es-US
French(America) fr-US Swahili sw
German de Swedish sv
Greek, Modern el Taiwan zh-TW
Hausa ha Tamil (Not provided) en-GB
Hebrew he Thai th
Hindi (Not provided) en-GB Turkish tr
Hongkong zh-HK Urdu ur
Hungarian hu Vietnamese vi
Igbo ig Xhosa xh
Indonesian id Yoruba yo
Italian it Zulu zu
Korean ko
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The table stated below shows the codes delivered from „language‟ attribute. „language‟ attribute is
replaced with „lang‟. „language‟ attribute is planned to be erased. Do not use it further.
Language Code Language Code
Korean 0 Spanish 24
English 1 Swedish 25
Spanish(America) 2 Turkish 26
French(America) 3 Chinese 27
Portuguese(America) 4 Hongkong 28
Bulgarian 5 Taiwan 29
Croatian 6 Japanese 30
Czech 7 Maori 31
Danish 8 CMN 32
Dutch 9 YUE 33
Finnish 10 Hindi 34
French 11 Estonian 35
German 12 Latvian 36
Modern Greek 13 Lithuanian 37
Hungarian 14 Arabic 38
Italian 15 Persian 39
Norwegian 16 QAA 40
English(GB) 17 AD 41
Polish 18 Catalan 42
Portuguese 19 VAL 43
Romany 20 Hebrew 44
Russian 21 OTHER 45
Serbian 22 Thai 46
Slovak 23
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9.3. Region Code
You can get this code from Application Manager. Refer ch. 6.7, for more details.
Code Region
KOR Korea
USA USA/Canada/Mexico
BRA Brazil, Paraguay, Uruguay, Argentine
PANEURO Europe
CHI China
HKG Hong Kong
ARB Arab
PANNORDIG Nordic
SOUTHEASTASIA South-East Asia (Vietnam, Thailand, India, China, Iran, Israel, Central Asia,
East Asia, Africa)
ASIA_ATV South-East Asia (Vietnam, Thailand, India, China, Iran, Israel, Central Asia,
East Asia, Africa)
ASIA_DTV Australia , New Zealand, Singapore
TW Taiwan, Columbia
NORTHAFRICA TURKEY, MOROCCO, TUNISIA
EA_DTV Indonesia, Malaysia, Republic of South Africa, Vietnam
CIS CIS
PHI Philippine
S_AFR_DTV South Africa DTV
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9.4. Product Category
These codes can be obtained from application manager while the application is operating. For more
details, refer to chapter 6.7.
Code Region
0 TV
1 Monitor
2 Blue-ray Disk
9.5. Caution information
9.5.1. Character sensitive target device
Broadcom Target is the case sensitive system.
So, making the matching name is important.
For example, if you have player.js file, but in index.html, you write like below, there willl be error in
Broadcom target.
<script language="javascript" type="text/javascript" src="Javascript/Player.js"></script>