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Resolved Response window that opens another response one with a MessageBox statement in the “Open” event

  1. How-to
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  1. Carlo Polo
    Carlo Polo
  2. PowerBuilder
  3. Tuesday, 2 April 2024 09:49 AM UTC

Hello,

I have a sample project (derived from a more complex one) in which the response window "w_resp_1" has a button "cb_1" whose "clicked" event opens another response window named "w_resp_2".

In the "Open" event of "w_resp_2" there is this MessageBox statement:

MessageBox(“Info”, “w_resp_2 opening…”)

If I run the project, after closing the MessageBox the "w_resp_2" window appears over the "w_resp_1", but the active window remains "w_resp_1".

As a walkaround in "w_resp_2" I created the user event  "ue_manage" in which I moved the MessageBox statement, and in the "Open" event I inserted only:

PostEvent(“ue_manage”)

In this way I noticed that the active window after closing the MessageBox is correctly "w_resp_2".

I was wondering if there is another way to solve this problem… Is there a statement that forces the "w_resp_2" to be the active window?

I already tried this code in the "Open" event of "w_resp_2":

MessageBox(“Info”, “w_resp_2 opening…”)
PostEvent(“activate”)

and this one too:

MessageBox(“Info”, “w_resp_2 opening…”)
ParentWindow().PostEvent(“deactivate”)

but they don’t function (the active window is still "w_resp_1")

Thank you

 

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Accepted Answer
Chris Pollach @Appeon
Chris Pollach @Appeon Accepted Answer Pending Moderation
  1. Thursday, 4 April 2024 08:20 AM UTC
  2. PowerBuilder
  3. # Permalink
Hi Carlo; That old PB version on newer Windows O/S versions could be your issue. I can open a response from a Response window OK in my STD framework testing on newer Appeon PB releases and on W10 & W11 O/S versions. HTH Regards .. Chris
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Carlo Polo
Carlo Polo Accepted Answer Pending Moderation
  1. Thursday, 4 April 2024 08:04 AM UTC
  2. PowerBuilder
  3. # 1

Hi Chris,

thank you.

I prepared the same sample project in PowerBuilder Classic 12.5.1 in my pc with W10 O/S version, and I confirm your hypothesis (in this case I have no problems).

Thanks, Regards

Carlo

 

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Chris Pollach @Appeon
  1. Chris Pollach @Appeon
  2. Thursday, 4 April 2024 13:54 PM UTC
That is awesome news Carlo ... Thank you for the feedback! :-)
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Carlo Polo
Carlo Polo Accepted Answer Pending Moderation
  1. Wednesday, 3 April 2024 08:04 AM UTC
  2. PowerBuilder
  3. # 2

Hi John,

thank tou for your answer.

I agree with you that a response window must be the active window until the user closes it.

The stange thing in this case (thing that I don't understand) is this one:

1) The user opens the first response window ("w_resp_1") and clicks on its "cb_1" button.

2) The "clicked" event of that button opens the second response window ("w_resp_2").

3) The "Open" event of "w_resp_2" displays the MessageBox.

4) The user clicks on the "OK" button of the MessageBox and closes it correctly.

5) At this point (after closing the MessageBox) I would expect the new active window to become "w_resp_2" (in fact "w_resp_2" is displayed OVER "w_resp_1"), but the new active window is "w_resp_1" instead.

If in the "Open" event of "w_resp_2" I put PostEvent("ue_manage") and in "ue_manage" I call the MessageBox, everything works correctly (when the user closes the MessageBox, the active window becomes "w_resp_2").

 

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John Fauss
John Fauss Accepted Answer Pending Moderation
  1. Tuesday, 2 April 2024 15:04 PM UTC
  2. PowerBuilder
  3. # 3

Hi, Carlo - 

A PowerBuilder response window is what the Windows operating system refers to as an "application modal dialog box". The purpose of a response window is to (a) present information to the user, (b) wait for the user's response, and (c) return the user's response to the calling application. A message box displayed by the MessageBox PowerScript function is a simple example. When an application model dialog box/window, the application cannot proceed until the user responds to the message.

Although the Windows O/S supports modeless dialog box windows (where the application is allowed to proceed while the dialog box window remains open, an example of this is the find/replace window in Microsoft Word), PB does not support this style of response window.

In the scenario you have described, you are attempting to make a (modal) response window in PB act like a modeless response window. That's not a good user interface technique, and the PB response window is not going to allow that to happen.

Best regards, John

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Carlo Polo
Carlo Polo Accepted Answer Pending Moderation
  1. Tuesday, 2 April 2024 09:52 AM UTC
  2. PowerBuilder
  3. # 4

P.S.: I use PowerBuilder 9.0.2

 

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