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Resolved datawindow loop

  1. How-to
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  1. mahmoud mahmoud
    mahmoud mahmoud
  2. PowerBuilder
  3. Monday, 2 January 2023 13:55 PM UTC

when i run loop on datawindow it move from row 1 to last page row and scroll to another page

but i need to move from row to next row but not using scroll  like when i deploy project i need datawindow same

 

 

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Ács Szabolcs
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John Fauss
John Fauss Accepted Answer Pending Moderation
  1. Wednesday, 11 January 2023 02:15 AM UTC
  2. PowerBuilder
  3. # 1

Hi, Mahmoud - 

Please try the attached sample app to see if it does what you are looking for.

This technique may not work for a grouped DataWindow (like the one in your video), because sorting of the rows and a GroupCalc() function call may be required after a row is appended.

Best regards, John

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ScrollingMessageLog.zip
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mahmoud mahmoud
mahmoud mahmoud Accepted Answer Pending Moderation
  1. Saturday, 7 January 2023 14:17 PM UTC
  2. PowerBuilder
  3. # 2

this vedio explan

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122121.rar
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Miguel Leeuwe
  1. Miguel Leeuwe
  2. Sunday, 8 January 2023 18:19 PM UTC
I've watched the video, (nice music :) ). You've adopted the suggested code by Olan, but I don't think that's what you want. You want all of the rows scroll up ONE row every time, not only scrolling up a full page when reaching a row that's not visible.

To do what you want, I think you would have to use a blank datawindow control into which you would insert new rows and then scroll to them.
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Miguel Leeuwe
  1. Miguel Leeuwe
  2. Sunday, 8 January 2023 18:20 PM UTC
(or something like that).
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Andreas Mykonios
Andreas Mykonios Accepted Answer Pending Moderation
  1. Wednesday, 4 January 2023 12:46 PM UTC
  2. PowerBuilder
  3. # 3

Hi.

Can you provide the code so we can see what you do? Simply show us the loop and how you manipulate your datawindow.

Andreas.

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mahmoud mahmoud
mahmoud mahmoud Accepted Answer Pending Moderation
  1. Wednesday, 4 January 2023 11:11 AM UTC
  2. PowerBuilder
  3. # 4

nothing change

 
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Olan Knight
Olan Knight Accepted Answer Pending Moderation
  1. Monday, 2 January 2023 18:52 PM UTC
  2. PowerBuilder
  3. # 5

FOR ll_row = ll_first_row TO ll_last_row

    ll_rc = dw.SetRedraw (TRUE)
    ll_rc = ScrollToRow (ll_row)
    ll_rc = dw.SetRedraw (FALSE)

 
   ... do processing

NEXT

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Miguel Leeuwe
  1. Miguel Leeuwe
  2. Tuesday, 10 January 2023 02:54 AM UTC
(on Windows now) Verfied, that property cannot be modfied using a Modify().
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Olan Knight
  1. Olan Knight
  2. Tuesday, 10 January 2023 16:16 PM UTC
Ah, well. It was worth a shot.



The only other way to handle this of which I am aware is to know the width of each row, and to manually scroll the DWO at runtime. I've done that it myself previously, and getting the height of t he column, including the borders is the key to this working correctly. I did this with a computed FIELD that I referenced at runtime via script, then used that value to scroll the DWO.

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Miguel Leeuwe
  1. Miguel Leeuwe
  2. Tuesday, 10 January 2023 16:51 PM UTC
Wow, that sounds like overkill but nice!

I don't really understand what the purpose of this functionality is in the first place. I would just unselect and select rows (or use a rowfocusindicator), in combination with scrollToRow. That way the user sees what's happening anyway.
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