WA SET CONTEXT
WA SET CONTEXT ( {* ;} object ; contextObj )
Parameter | Type | Description | |
---|---|---|---|
* | Operator | → | If specified, object is an object name (string). If omitted, object is a variable. |
object | any | → | Object name (if * is specified) or Variable (if * is omitted). |
contextObj | Object | → | Object containing the functions that can be called with 4ドルd . |
Description
The WA SET CONTEXT
command defines a context object contextObj for 4ドルd
in the Web area designated by the * and object parameters. When this command is used, 4ドルd
can only access contents declared within the provided contextObj. When no context object is set, 4ドルd
has access to all 4D methods and can not access user classes.
The command is only usable with an embedded web area where the Use embedded web rendering engine and Access 4D methods parameters are set to true
.
Pass in contextObj user class instances or formulas to be allowed in 4ドルd
as objects. Class functions that begin with _
are considered hidden and cannot be used with 4ドルd
.
- If contextObj is null,
4ドルd
has access to all 4D methods. - If contextObj is empty,
4ドルd
has no access.
Example 1
Allow 4ドルd
to specific methods
var $context:={}
$context.myMethod:=Formula(myMethod)
$context.myMethod2:=Formula(myMethod2)
WA SET CONTEXT(*; "myWebArea"; $context)
In JavaScript:
4ドルd.myMethod();// Allowed
4ドルd.myMethod2();// Allowed
4ドルd.someOtherMethod();// Not accessible
Example 2
Using a Class Object
var $myWAObject:=cs.WAFunctions.new()
WA SET CONTEXT(*; "MyWA"; $myWAObject)
In JavaScript:
4ドルd.myWAFunction();// Allowed
4ドルd._myPrivateFunction();// Will do nothing because function is private
See also
Properties
Command number | 1848 |
Thread safe | ✗ |