Simplifying hide-whens with @True and @False

Simplifying hide-whens with @True and @False formulas

Tip submitted by
Mataprasad Agralwal

Level: Intermediate
Works with: Notes/Domoino
Updated: 03-Mar-2002

Using a specific example, this tip shows how to use @True and @False to simplify hide-when formulas that include more than one AND/OR conditions.

Our example includes two parts:

Depending on whether or not the AND/OR conditions are met, a document shows or hides action buttons.
Depending on whether or not the AND/OR conditions are met, a view selection formula shows or hides documents in a view.

In the first part of our example, we want to know whether or not the user is a member of a group allowed to approve documents. If so, then we want to show certain action buttons on a document to allow the user to approve the document. Add the following code to your form's action button hide-when formula:

var:=@If(@Ismember(@UserName;EditorsList) & FieldStatus="Approve";@True; @False);
var1:=@IF(OtherApproversComment !="" & @IsAvailable(RTF);@False;@True);
var2:=@IF(Approval="Yes" & SomeFlag="NO";@False;@True);

The condition is met if both var and var1 are true or if var2 is true. On the hide-when tab of the Action Properties box, add the following code:

@IF((var & var1) | var2;@False;@True);

Next, we want to tailor our view selection formula to evaluate to show only approved documents. Again, the condition for displaying the document in a view is met if both var and var1 are true or if var2 is true. Enter the following code in the view selection formula:

var:=@If(@Ismember(@UserName;EditorsList)AND FieldStatus="Approve";@True;
@False);
var1:=@IF(OtherApproversComment !="" AND @IsAvailable(RTF);@False;@True);
var2:=@IF(Approval="Yes" AND SomeFlag="NO";@False;@True);
var3 := @IF((var & var1) | var2;@True;@False);
Select (Form="This" | Form="That") & var3

This code filters the view documents like search parameters.

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