WebView

Enterprise Browser 1.6

Overview

The Webview is the core container used for rendering your application code. You can control certain behaviors of the webview by using this API class.

Note: There is currently an issue with hyperlinks on CE devices using the IE Engine: if you are attempting to click a link while holding the shift hardware key on the device, the link will not work properly. This is a known issue and is being worked on currently.

Enabling the API

There are two methods of enabling the Webview API:

  • Include all ebapi modules
  • Include only the required API modules

For either of these methods, you'll need to include files from the /Enterprise Browser/JavaScript Files/Enterprise Browser directory on the computer that you installed the Enterprise Browser.

Include all JS API modules

To include all JS APIs, copy the ebapi-modules.js file to a location accessible by the app's files and include a reference to the JavaScript file in the app's HTML. For instance, to include the modules file in the app's index.html, copy the file to the same directory as that index.html and add the following line to the HTML's HEAD section:


<script type="text/javascript" charset="utf-8" src="ebapi-modules.js"></script>

Note: that the pathing for this file is relative to the current page.

This will define the EB class within the page. Any page you need to use the modules will need to have the .js file included in this fashion.

Include only the required modules

To include single APIs, you must first include the ebapi.js in your HTML as well as the API file you want to use. For instance, to use the Webview API, I would add the following code to my HTML file(s), assuming the API files have been copied to the same directory as the HTML.


<script type="text/javascript" charset="utf-8" src="ebapi.js"></script>
<script type="text/javascript" charset="utf-8" src="eb.webview.js"></script>

The ebapi.js file is necessary for all single API inclusions.

Methods

Force WebView to navigate to a URL. White page flickering during transition may happen if a controller action method doesn't return any rendered value, but instead performs a WebView.navigate(someUrl) call.

Parameters

  • url : STRING

    Navigate to this url.

  • tabIndex : INTEGER Optional Default: -1

    TabBar tab index. If no tab bar present, index is ignored. Please avoid of navigate in not opened tab - this is unsupported on Android. Refresh active WebView.

  • callback : CallBackHandler

Returns

Synchronous Return:

  • Void

Platforms

  • Android
  • Windows Mobile
  • Windows CE

Method Access:

  • Class Method: This method can only be accessed via the API class object.
    • EB.WebView.navigate(STRING url, INTEGER tabIndex)

Force WebView to navigate to the previous page using Browser back.

Parameters

  • tabIndex : INTEGER Optional Default: -1

    TabBar tab index. If no tab bar present, index is ignored. Navigate back in active WebView.

  • callback : CallBackHandler

Returns

Synchronous Return:

  • Void

Platforms

  • Android
  • Windows Mobile
  • Windows CE

Method Access:

  • Class Method: This method can only be accessed via the API class object.
    • EB.WebView.navigateBack(INTEGER tabIndex)

refresh(INTEGER tabIndex)

Force WebView to refresh the current page.

Parameters

  • tabIndex : INTEGER Optional Default: -1

    TabBar tab index. If no tab bar present, index is ignored. Refresh active WebView.

  • callback : CallBackHandler

Returns

Synchronous Return:

  • Void

Platforms

  • Android
  • Windows Mobile
  • Windows CE

Method Access:

  • Class Method: This method can only be accessed via the API class object.
    • EB.WebView.refresh(INTEGER tabIndex)

save(STRING format, STRING path, INTEGER tabIndex)

Save current page to file system.

Parameters

  • format : STRING

    Format of the saved page.

    Possible Values :

    Constant: EB.WebView.SAVE_FORMAT_JPEG
    String:jpeg
    Save as jpeg image.
  • path : STRING

    Path to the file / folder to save the page.

  • tabIndex : INTEGER Optional Default: -1

    TabBar tab index. If no tab bar present, index is ignored. If tabbar index omitted then active WebView will be saved.

  • callback : CallBackHandler

Returns

Synchronous Return:

  • Void

Platforms

  • Android

Method Access:

  • Class Method: This method can only be accessed via the API class object.
    • EB.WebView.save(STRING format, STRING path, INTEGER tabIndex)

Properties

activeTab

Type

INTEGER Read Only

Description

Return an active tab index. For change active tab use Use Rho.NativeTabbar.currentTab property.

Access

  • Class: This property can only be accessed via the API class object.
    • EB.WebView.activeTab

Platforms

  • Android
  • Windows Mobile
  • Windows CE

cacheSize

Type

INTEGER Read Only

Description

The browser cache size, in whole MBs. Defines in config.xml: Navigation\Cache.

Access

  • Class: This property can only be accessed via the API class object.
    • EB.WebView.cacheSize

Platforms

  • Windows Mobile(WebKit)

enableCache

Type

BOOLEAN Read Only

Description

Enable / disable Browser cache. Use 'WebView.enableCache' parameter in rhoconfig.txt to configure this value.

Params

Default: true

Access

  • Class: This property can only be accessed via the API class object.
    • EB.WebView.enableCache

Platforms

  • Android

enableZoom

Type

BOOLEAN Read Only

Description

Enable WebView zoom. Use 'EnableZoom' parameter in Config.xml to configure this value.

Params

Default: true

Access

  • Class: This property can only be accessed via the API class object.
    • EB.WebView.enableZoom

Platforms

  • Android

fontFamily

Type

STRING Read Only

Description

Specifies the default font to use when rendering text in web pages. The specified font should be a TrueType font present on the device. On Windows the default font has been set to 'Tahoma' as this is present on all Symbol WM / CE devices, note that Tahoma has no italic or oblique variants. On the Enterprise Tablet the default is Droid Sans Fallback. The font specified must be stored in \Windows for Windows WM / CE devices, or /system/fonts for Enterprise Tablet. Defines in config.xml: HTMLStyles\FontFamily

Access

  • Class: This property can only be accessed via the API class object.
    • EB.WebView.fontFamily

Platforms

  • Windows Mobile(WebKit)

framework

Type

STRING Read Only

Description

Same as System.webViewFramework.

Access

  • Class: This property can only be accessed via the API class object.
    • EB.WebView.framework

Platforms

  • Android
  • Windows Mobile
  • Windows CE

fullScreen

Type

BOOLEAN

Description

Use full screen mode.

Params

Default: false

Access

  • Class: This property can only be accessed via the API class object.
    • EB.WebView.fullScreen

Platforms

  • Android
  • Windows Mobile
  • Windows CE

Type

INTEGER

Description

Can be defined in config.xml: Navigation\NavTimeout. Number of milliseconds(maximum is 45000) before the browser times out and navigates to the page specified in the badlink setting. If it is determined that the destination is unreachable regardless of wait time, the badlink may be loaded before NAVTIMEOUT. This is the time taken to establish communication with the server, not the time taken to fully load the page.Note that the navigation timeout will not be invoked when navigating to the start page, best practice is to store your first page locally to avoid connectivity issues at start up, you can then redirect to an online page if desired.

Params

Default: 45000

Access

  • Class: This property can only be accessed via the API class object.
    • EB.WebView.navigationTimeout

Platforms

  • Windows Mobile(WebKit)

scrollTechnique

Type

STRING Read Only

Description

Specifies the technique used to scroll about the page.Defines in config.xml: Scrolling\ScrollTechnique.

Params

Default: FingerScroll

Values

Possible Values (STRING):

  • Constant: EB.WebView.SCROLL_NONE - String: None No scrollbars will be displayed and the page will not respond to finger swipes.
  • Constant: EB.WebView.SCROLL_SCROLLBARS - String: Scrollbars When the size of the page is larger than the screen scrollbars will be presented which can be used to scroll the page.
  • Constant: EB.WebView.SCROLL_FINGER - String: FingerScroll You can scroll around the page using finger swiping.

Access

  • Class: This property can only be accessed via the API class object.
    • EB.WebView.scrollTechnique

Platforms

  • Windows Mobile(WebKit)

textZoomLevel

Type

INTEGER

Description

Sets the font size to be displayed on the page, set to 0 for the smallest font and 4 for the largest font.

Access

  • Class: This property can only be accessed via the API class object.
    • EB.WebView.textZoomLevel

Platforms

  • Android
  • Windows Mobile(WebKit)

userAgent

Type

STRING Read Only

Description

Defines in config.xml: Navigation\UserAgent. When visiting a web server the WebKit browser will report its self as the specified user agent. Use the following substitution variables:

  • %p - platform name ("Windows CE " + version number)
  • %w - WebKit version number
  • %e - WebKit version number.

Use the UserAgent setting to spoof your device to the server, e.g. to view content designed for the desktop on your mobile screen. From RhoElements 2.1 onwards the default value was changed to work out of the box with a greater number of server configurations, prior to RhoElements 2.1 the default user agent was: "Mozilla/5.0 (%p) AppleWebKit/%w (KHTML, like Gecko) WebKit/%e Safari/%w"

Access

  • Class: This property can only be accessed via the API class object.
    • EB.WebView.userAgent

Platforms

  • Windows Mobile(WebKit)

viewportEnabled

Type

BOOLEAN Read Only

Description

Whether to enable or disable viewport meta tag processing.Defines in config.xml: Navigation\ViewportEnabled.

Params

Default: true

Access

  • Class: This property can only be accessed via the API class object.
    • EB.WebView.viewportEnabled

Platforms

  • Windows Mobile(WebKit)

viewportWidth

Type

INTEGER Read Only

Description

Default viewport width to use for pages that do not have a viewport meta tag (uses 1:1 scaling if not specified).Defines in config.xml: Navigation\ViewportWidth.

Access

  • Class: This property can only be accessed via the API class object.
    • EB.WebView.viewportWidth

Platforms

  • Windows Mobile(WebKit)

zoomPage

Type

FLOAT

Description

Sets the zoom factor of the page. Factor 1.0 is no zoom, values less than 1.0 are zoomed out and values greater than 1.0 are zoomed in.It is recommended to not to use the zoom value less than 1.0 because the page doesn't look in readable format.In Android new Zoom value takes effect on current page, Previous page has to be revisited for the new zoom values to take effect

Access

  • Class: This property can only be accessed via the API class object.
    • EB.WebView.zoomPage

Platforms

  • Android
  • Windows Mobile(WebKit)