ADD Action

This document covers the following topics:

Description

Creates a single specified dialog element dynamically. See also Creating/Deleting Dialog Elements Dynamically in the section Event-Driven Programming Techniques documentation. This action is most frequently used to add items to a List Box Control or to a Selection Box Control or to add column specifications to a table. It can also be used to create all kinds of dialog elements dynamically.

There are two syntax options of this action:

PROCESS GUI ACTION ADD WITH...

This option has the parameters as listed below. Other attributes of the newly created dialog element have to be set in the global attributes list before the PROCESS GUI statement.

PROCESS GUI ACTION ADD WITH PARAMETERS... END-PARAMETERS

This option accepts a list of attribute assignments, one for each attribute that is to be specified for the newly created dialog element. If you use this option, the global attribute list is not used or affected. For all attributes that are not explicitly specified, the default value is taken.

Parameters for the ADD WITH option

Name/Data Type Explanation
HANDLE OF GUI Input

The handle of the parent dialog element.
Type (I4) Input

The type of dialog element to be created.
HANDLE OF GUI Output

The handle of the newly created dialog element.
Response (I4) Output

Natural error (if applicable).

Example 1 (option 1): 

 DEFINE DATA LOCAL 
   1 #NEW1 HANDLE OF INPUTFIELD 
   END-DEFINE 
   ... 
   #NEW1.STRING:= 'NEW1' 
   #NEW1.RECTANGLE-X:= 24 
   #NEW1.RECTANGLE-Y:= 30 
   #NEW1.RECTANGLE-W:= 176 
   #NEW1.RECTANGLE-H:= 28 
   #NEW1.ENABLED:= TRUE 
   #NEW1.VISIBLE:= TRUE 
   PROCESS GUI ACTION ADD WITH #DLG$WINDOW INPUTFIELD #NEW1

Example 2 (option 2): 

DEFINE DATA LOCAL 
   1 #NEW2 HANDLE OF INPUTFIELD 
   END-DEFINE 
   ... 
   PROCESS GUI ACTION ADD WITH PARAMETERS 
      HANDLE-VARIABLE = #NEW2 
      TYPE = INPUTFIELD 
      STRING = 'NEW2' 
      RECTANGLE-X = 24 
      RECTANGLE-Y = 30 
      RECTANGLE-W = 176 
      RECTANGLE-H = 28 
      ENABLED = TRUE 
      VISIBLE = TRUE 
      PARENT = #DLG$WINDOW 
   END-PARAMETERS

If you insert a new dialog element dynamically by using the ADD action, you determine its position in the navigation sequence by creating the dialog element and setting the SUCCESSOR attribute to the handle value of its successor.

Example: 

   /* Insert Input Field Control #NEW1 before push button control #PB-1 
   /* Be careful not to trigger the PROCESS GUI statement action from a push 
   /* button control named #PB-1 because you are already defining it 
   DEFINE DATA LOCAL 
   1 #NEW1 HANDLE OF INPUTFIELD 
   1 #PB-1 HANDLE OF PUSHBUTTON 
   END-DEFINE 
   ... 
   PROCESS GUI ACTION ADD WITH PARAMETERS 
      PARENT = #DLG$WINDOW 
      HANDLE-VARIABLE = #NEW1 
      TYPE = INPUTFIELD 
      SUCCESSOR = #PB-1 
      ... 
   END-PARAMETERS