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Resolved Is there a programmatic way to obtain the names of all enumerated types?

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  1. John Fauss
    John Fauss
  2. PowerBuilder
  3. Friday, 24 April 2020 21:51 PM UTC

The Object Browser window in the IDE contains a tab named "Enumerated" that lists all of the enumerated types supported by the PB version. As PB evolves, this list grows (2019 R2 contains 9 enumerated types not available in PB 2017 R2, for example).

I've created a PBNI extension DLL that contains functions for listing the item names and/or numeric values for any enumerated type, to assist me when I am dynamically coding DataWindow syntax, for example, but I would also like to be able to obtain a list of all of enumerated types...like the Object Browser does.

Does anyone know of a way to do this, other than entering all of the names by hand?

John

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Responses (2)
Michael Kramer
Michael Kramer Accepted Answer Pending Moderation
  1. Saturday, 25 April 2020 21:35 PM UTC
  2. PowerBuilder
  3. # 1

To obtain details on specific ENUM type you have PB reflection.

string function of_TestAnyEnum(string as_enumType)
   TypeDefinition metaType
   EnumerationDefinition enumType
   EnumerationItemDefinition enumItem
   long i
   string text

   metaType = FindTypeDefinition(as_enumtype)
   if IsNull(metaType) then return "! No such type !"
   if metaType.Category <> EnumeratedType! then return "! Not an enum type !"
   enumType = metaType

   // Actual sort order is reverse alphabetical !
   for i = UpperBound(enumType.Enumeration) to 1 step -1
      enumItem = enumType.Enumeration[i]
      text = enumItem.Name + " :: " + string(enumItem.Value) + "~r~n"
   next
   return text
end function

But your real question is how to get list of available enumerations for specific PB app? (read: which varies by PB release as you point out)

/Michael

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John Fauss
  1. John Fauss
  2. Saturday, 25 April 2020 22:11 PM UTC
Hi, Michael - As you correctly state at the end, my question is how to obtain the list of enumerations supported by the PB version being used (such as SaveAsType, dwItemStatus). I really appreciate the code sample you provided, as it shows how to obtain the enumItem names and values in PB without having to use a PBNI extension. Yet, this was a good exercise to use to learn how to code a PBNI extension. Thank you for responding!
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Michael Kramer
  1. Michael Kramer
  2. Sunday, 26 April 2020 14:07 PM UTC
Hi John, Definitely - good choice for a limited scope yet valuable PBNI tiny-project. Easily testable.

What surprised me is item order inside array = EnumerationDefinition.Enumeration. They are "Item.Name desc". I never would have guessed. In any case all enums I tested had min. value = 0. Also they all are defined in PBMVM190.dll (tested in PB 2019R). I wonder whether I can do LibraryDirectory of PBVM190.dll . . .
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Roland Smith
Roland Smith Accepted Answer Pending Moderation
  1. Saturday, 25 April 2020 03:00 AM UTC
  2. PowerBuilder
  3. # 2

If it is anything like C/C++, the first value is 0, the next 1, and so on.

 

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John Fauss
  1. John Fauss
  2. Saturday, 25 April 2020 22:00 PM UTC
You are correct, Roland, but this is not what I'm asking. I'm looking for a way to obtain the list of the enumerated types (such as Border, dwItemStatus. dwBuffer & SaveAsType) supported by the current version of PB being used. Once I can validate the name of the enumerated type, I can obtain the list of enumItem Names & Values.
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