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Resolved CloseWithReturn when string is empty

  1. How-to
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  1. Yuri Denshchik
    Yuri Denshchik
  2. PowerBuilder
  3. Wednesday, 26 June 2019 16:30 PM UTC

I have modal window with OK and Cancel buttons. 

On OK button the modal closes and returns some string value: CloseWithReturn(Parent, ls_string)

On Cancel it just closes the modal:Close(Parent)

How to distinguish on  parent window that user clicked on OK or Cancel button when return string is empty ?

Message.StringParm is empty for both of the cases.

Thank you,

Yuri

 

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Accepted Answer
John Fauss
John Fauss Accepted Answer Pending Moderation
  1. Wednesday, 26 June 2019 18:36 PM UTC
  2. PowerBuilder
  3. # Permalink

Hi, Yuri -

I always pass to the opened window a generalized parameters structure that contains a special-purpose boolean along with unbounded arrays of many different datatypes:

Boolean b_cancel
Boolean b_val[]
Integer i_val[]
UInt    ui_val[]
Long    l_val[]
ULong   ul_val[]
Decimal dec_val[]
String  s_val[]
DataWindow dw_val[]
  .
  .
  .

You get the idea. I populate the arrays as needed before passing the structure in to a window via OpenWithParm or OpenSheetWithParm, and I pass back another parameters structure that has been populated as needed via CloseWithReturn.

The opened window must set the "b_cancel" structure member to TRUE if the user closes the window by canceling. The structure is returned as Message.PowerObjectParm. I always open/close windows with this convention so that the opened window can notify the calling window/object if the user closed the window by canceling.

HTH

John

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Responses (3)
Roland Smith
Roland Smith Accepted Answer Pending Moderation
  1. Wednesday, 26 June 2019 19:26 PM UTC
  2. PowerBuilder
  3. # 1

I like to put this in both buttons:

CloseWithReturn(Parent, this.ClassName())

Then in the calling script I put a case statement like this:

choose case Message.StringParm
   case "cb_ok"
   case else // cb_cancel or empty if the X button clicked
end choose

 

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Chris Pollach @Appeon
Chris Pollach @Appeon Accepted Answer Pending Moderation
  1. Wednesday, 26 June 2019 18:51 PM UTC
  2. PowerBuilder
  3. # 2

Hi Yuri;

  You should always then use a CloseWithReturn - for example

CloseWithReturn (Parent, "")   

// OR ....

        Message.StringParm = ""

Close (Parent)

HTH

Regards ... Chris

 

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