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Resolved Re: Determine width of value in a char column

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  1. Ricardo Colarina
    Ricardo Colarina
  2. PowerBuilder
  3. Tuesday, 29 August 2017 06:24 AM UTC

Hi All,

Do you have a recommendation on how to determine the width of the value of a char column?  At the moment, I use GetTextExtentPoint32A, but this slows down the retrieval, as I set a computed column in the datawindow as a flag in the retrieverow event, which is then used by the enabled property of the tooltip.  Is there a way instead to determine if the ellipsis is showing where it is enabled in the column format?  I need to determine the width of the value as I'm using tooltips, but I only want to display the tooltip if the column value doesn't fit the column width.  I also tried using a hidden multilineedit control, and just determine the LineCount.

Thanks.

Best Regards,

Ricardo

 

  1. DataWindow
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Responses (5)
Shenn Sellers
Shenn Sellers Accepted Answer Pending Moderation
  1. Tuesday, 29 August 2017 21:42 PM UTC
  2. PowerBuilder
  3. # 1

Here is an example of displaying Tooltips only when data goes beyond the length of the column.

https://drive.google.com/open?id=0B6J5FirdQZquYXI0QnFWdWJabjQ

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Roland Smith
Roland Smith Accepted Answer Pending Moderation
  1. Tuesday, 29 August 2017 19:00 PM UTC
  2. PowerBuilder
  3. # 2

To get the latest version of the full example app Eduardo posted, go here:

http://www.topwizprogramming.com/freecode_dwgridxp.html

Basically it calls the function in a loop after retrieve is done rather than as each row comes in.

 

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Eduardo G.
Eduardo G. Accepted Answer Pending Moderation
  1. Tuesday, 29 August 2017 10:01 AM UTC
  2. PowerBuilder
  3. # 3

I hope to help you. In the following URL look for the function: of_resizewidth, that's how I use it.

http://pbminer.dwox.com/Sources/TopWiz/dwgridxp/PB8/n_svc_dw_gridstyle.sru

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René Ullrich
René Ullrich Accepted Answer Pending Moderation
  1. Tuesday, 29 August 2017 08:59 AM UTC
  2. PowerBuilder
  3. # 4

One more thing: Coding in retrieverow event is bad for performance. You should calculate the text size after retrieve.

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René Ullrich
René Ullrich Accepted Answer Pending Moderation
  1. Tuesday, 29 August 2017 08:57 AM UTC
  2. PowerBuilder
  3. # 5

Hi Ricardo,

good idea to make tooltip only available if ellipsis is showing. I had the same idea but found no solution.

BTW: You should use GetTextExtentPoint32W instead of GetTextExtentPoint32A.

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