WA SET CONTEXT

WA SET CONTEXT ( {* ;} object ; contextObj )

Parámetros	Tipo		Descripción
*	Operador	→	If specified, object is an object name (string). If omitted, object is a variable.
object	Objetos de formulario	→	Object name (if * is specified) or Variable (if * is omitted).
contextObj	Object	→	Object containing the functions that can be called with $4d.

Descripción

The WA SET CONTEXT command defines a context object contextObj for $4d in the Web area designated by the * and object parameters. When this command is used, $4d can only access contents declared within the provided contextObj. When no context object is set, $4d has access to all 4D methods and can not access user classes.

nota

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 $4d as objects. Class functions that begin with _ are considered hidden and cannot be used with $4d.

• If contextObj is null, $4d has access to all 4D methods.
• If contextObj is empty, $4d has no access.

Ejemplo 1

Allow $4d to specific methods

 var $context:={}
 $context.myMethod:=Formula(myMethod)
 $context.myMethod2:=Formula(myMethod2)

 WA SET CONTEXT(*; "myWebArea"; $context)

In JavaScript:

$4d.myMethod(); // Allowed
$4d.myMethod2(); // Allowed
$4d.someOtherMethod(); // Not accessible

Ejemplo 2

Using a Class Object

 var $myWAObject:=cs.WAFunctions.new()

 WA SET CONTEXT(*; "MyWA"; $myWAObject)

In JavaScript:

$4d.myWAFunction(); // Allowed
$4d._myPrivateFunction(); // Will do nothing because function is private

Ver también

WA Get context

Propiedades

Número de comando	1848
Hilo seguro	✗