WA SET CONTEXT

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

Parâmetro	Tipo		Descrição
*	Operador	→	Se especificado, object é um nome de objeto (string). If omitted, object is a variable.
object	Objecto de formulário	→	Nome do objeto (se * for especificado) ou Variável (se * for omitido).
contextObj	Object	→	Object containing the functions that can be called with $4d.

Descrição

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.
• Se contextObj estiver vazio, $4d não terá acesso.

Exemplo 1

Permitir $4d a métodos específicos

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

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

Em JavaScript:

$4d.myMethod(); // Permitiu
$4d.myMethod2(); // Permitiu
$4d.someOtherMethod(); // Não acessível

Exemplo 2

Using a Class Object

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

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

Em JavaScript:

$4d.myWAFunction(); // Permitido
$4d._myPrivateFunction(); // Não fará nada porque a função é privada

Veja também

WA Get context

Propriedades

Número de comando	1848
Thread safe	✗