Overview
The Upca Decoder is used to enable or disable the upca decoder.
Syntax
| upca (Decoder) <META> Syntax |
|---|
<META HTTP-Equiv="scanner" content="upca:[parameter]"> |
| upca JavaScript Object Syntax: |
|---|
| By default the JavaScript Object 'scanner' will exist on the current page and can be used to interact directly with the upca. |
|
To Set upca parameters via JavaScript use the following syntax: scanner.Parameter = Value;
e.g. scanner.upca = Value; |
Parameters
Items listed in this section indicate parameters, or attributes which can be set.
| Name | Possible Values | Description | Default Value |
|---|---|---|---|
| upca:[Value] | enabled/Disabled | Enables/Disables the upca decoder. | Device specific |
Requirements
| RhoElements Version | 1.0.0 or above |
|---|---|
| Supported Devices | All supported devices. |
| Minimum Requirements | Scanner or Imager module and device that supports upca. |
| Persistence | Transient - Decoder settings are only guaranteed to persist until the Scanner is disabled |
HTML/JavaScript Examples
The following example enables the scanner to read only upca labels:
<META HTTP-Equiv="scanner" Content="allDecoders:disabled">
<META HTTP-Equiv="scanner" Content="upca:enabled">
<META HTTP-Equiv="scanner" Content="enabled">
Above example can also be written as shown below:
<META HTTP-Equiv="scanner" Content="allDecoders:disabled;upca:enabled;enabled">
or
<META HTTP-Equiv="scanner-all_decoders" Content="disabled">
<META HTTP-Equiv="scanner-upca" Content="enabled">
<META HTTP-Equiv="scanner-enabled" Content="SCN1">
The following example enables the scanner to read all labels except upca:
<META HTTP-Equiv="scanner" Content="allDecoders:enabled">
<META HTTP-Equiv="scanner" Content="upca:disabled">
<META HTTP-Equiv="scanner" Content="enabled">