DataHub APIs for C++, Java, and .NET : Version 6.4
	Chapter 3. Standard Java Applets

DataHubBaseApplet

DataHubBaseApplet — a base class, not instantiated.

Description

This is a base class that should not be directly instantiated. It provides the facilities and parameters for making a connection to the DataHub to its derived classes. Every web page must contain one applet derived from DataHubBaseApplet. Currently the choices are DataHubViewer or DataHubLink.

Base Class

Applet

Parameters

Parameter	Type	Default	Description
`name`	`string`	`DataHubViewer`	A `DataHubBaseApplet` publishes a name that is used by `DataHubListener` applets to connect with the `DataHubBaseApplet`. This name can be any unique string.
`domain`	`string`	`DataSim`	This parameter determines the data domain in the DataHub that this web page will use. Currently all DataHub points on a web page must come from a single data domain. This applet will subscribe to every data point in the domain.
`host`	`string`	`null`	The host name running the DataHub. Normally you should not use this parameter. The `DataHubBaseApplet` will compute the host name from the URL of the page. If you provide this parameter you must also ensure that the Java permissions of your web browser are appropriate to allow the browser to connect to this host.
`port`	`integer`	`4600`	The port number that the DataHub is listening on as a master for mirroring (or tunnelling).
`bgcolor`	`color`	`white`	The background color of the applet.
`fgcolor`	`color`	`black`	The foreground color of the applet.
`username`	`string`	`null`	The user name used to authenticate this connection with the DataHub.
`password`	`string`	`null`	The password used to authenticate this connection with the DataHub.