Overview
The KeyState Module is used to set the parameters of the KeyState indicators, which display icons for Shift, Alt, Control, Function, Caps, Num lock, and the state of the Orange keys on some devices. Icons are placed beginning at the leftmost screen position in a row that extends toward the right, as necessary.
Syntax
| keyState (Module) <META> Syntax |
|---|
<META HTTP-Equiv="KeyState" content="[parameter]"> |
| KeyState JavaScript Object Syntax: |
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| By default the JavaScript Object 'keyState' will exist on the current page and can be used to interact directly with the keyState. |
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To Set keyState parameters via JavaScript use the following syntax: keystate.parameter = 'value'; remembering to enclose your value in quotes where appropriate.
e.g. keyState.right = 'value'; |
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To set multiple EMML parameters / events on a single line use the following syntax: keystate.setEMML("[Your EMML Tags]");
e.g. keyState.setEMML("right:value"); |
Parameters
Items listed in this section indicate parameters, or attributes which can be set.
| Name | Possible Values | Description | Default Value |
|---|---|---|---|
| right:[Value] | Positive number, representing pixels | Sets the X position of the right-hand edge of the KeyState indicators. | Indicators start at the bottom right of the screen. |
| left:[Value] | Positive number, representing pixels | The same as Right, included for backward compatibility. | Indicators start at the bottom right of the screen. |
| top:[Value] | Positive number, representing pixels | Sets the Y position of the KeyState indicators. | Indicators start at the bottom right of the screen. |
| height:[Value] | Positive number, representing pixels | Sets the height of the KeyState Indicators. | Dependant on screen resolution |
| width:[Value] | Positive number, representing pixels | Sets the width of each KeyState indicator. | Dependant on screen resolution |
| visibility:[Value] | Visible, Hidden | Sets the visibility of the keystate indicators. | Hidden. |
Remarks
Switching to Other Applications
All controls are designed to be shown on top of RhoElements. If you require to switch to an application other than RhoElements you should minimize RhoElements to ensure the buttons do not remain shown. (Not applicable to Enterprise Tablet)
Screen Orientation
When the screen orientation changes, either using the ScreenOrientation tag or by rotating a device with hardware support, the command areas will automatically move and resize to fit the new layout. However the buttons themselves are not moved and in some cases this may result in them being off the screen or not in the expected position. If so they must be moved manually by detecting the ScreenOrientationEvent.
Devices lacking support
Due to platform limitations this API is not available on the following Zebra Technologies devices:
- Workabout Pro 4
Requirements
| RhoElements Version | 1.0.0 or above |
|---|---|
| Supported Devices | All supported Windows Mobile/CE devices. |
| Minimum Requirements | None. |
| Persistence | Persistent - Changes to this module will persist when navigating to a new page. |
HTML/JavaScript Examples
The following example shows the KeyState indicators and sets the right and top coordinates to 50.
<META HTTP-Equiv="KeyState" Content="Visibility:Visible">
<META HTTP-Equiv="KeyState" Content="Right:50">
<META HTTP-Equiv="KeyState" Content="Top:50">
The following example shows the KeyState and sets the right and top coordinates to 20.
<META HTTP-Equiv="KeyState" Content="Visibility:Visible; Right:20; Top:20">