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Resolved How to I set column sorting on a dw?

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  1. Tracy Lamb
    Tracy Lamb
  2. PowerBuilder
  3. Tuesday, 17 May 2022 13:05 PM UTC

Hi all,

I've got a few grid style DW's that I'd like to automatically sort when the user clicks on the column name (label). I'm using PB2021 and the latest PFC.  The dw's inherit from u_dw.  I'm turning on the sort service, but it seems to be ignored.  I'd like to sort on the column without any pop-up windows asking for columns, drag/drop etc.  

In the dw's constructor event:

this.of_SetSort(TRUE)
this.inv_sort.of_SetColumnNameSource(0) // Use the column names for sorting
this.inv_Sort.of_SetColumnHeader( TRUE ) // Sort when user clicks column header
this.inv_Sort.of_SetStyle( 0 ) // PB's Drag/Drop Sort window

This is not my preferred style, though.  Even so, I don't know how to pop-up the drag/drop sort window, either, without a separate menu option (Sort).

Any advice is appreciated.

TIA,
~~~Tracy

 

  1. PFC
  2. PowerBuilder (Appeon)
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Accepted Answer
John Fauss
John Fauss Accepted Answer Pending Moderation
  1. Thursday, 19 May 2022 02:06 AM UTC
  2. PowerBuilder
  3. # Permalink

Edit the DataWindow data object and un-check the "Column Moving" property, then re-try.

The sequence of events leading up to the triggering of the pfc_Clicked event in the Sort service (inv_sort) is different for Grid DW's (where Processing=1). Normally, code in u_dw's Clicked event triggers the pfc_Clicked event in inv_Sort... Look at the last six lines in pfc_u_dw's Clicked event. However, this does NOT occur when the Data Object is a grid style.

For grids, the pfc_Clicked event in inv_Sort gets postponed until the pfc_PostLButtonUp event, an event posted from the LButtonUp event. In the pfc_PostLButtonUp event script, the Data Object's style is again checked... If it's a Grid, the pfc_Clicked event in inv_Sort is triggered, but ONLY if the DW's internal syntax has not been modified. DW syntax modification occurs at the proverbial click of a mouse button when Column Moving is enabled. If you disable this property, the DW syntax does not get modified so flippantly. 

I really dislike the way u_dw/pfc_u_dw handles the mouse button up/down and clicked events. Frankly, it's a hot mess. I'm not sure why it's this way, but I suspect someone made one or more changes without thoroughly understanding everything.

If your app needs to let the user move columns around in a grid DW, use the DW Grid service to accomplish this.

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Tracy Lamb
  1. Tracy Lamb
  2. Thursday, 19 May 2022 13:31 PM UTC
Thank you John... excellent research! I don't think I would have found this on my own. In my u_dw object, I was over-riding the lbuttonup, lbuttondown, rbuttonup, and rbuttondown events to prevent the default windows RMB menu from popping up after my own rbuttonup RMB menu. (Explained to me in another question I posted.) I never use the lbuttonup, lbuttondown and rbuttondown events. So I removed the over-ride on those events and just left the over-ride in the rbuttonup event. Everything seems to work fine now.

Many thanks,

~~~Tracy
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Responses (8)
René Ullrich
René Ullrich Accepted Answer Pending Moderation
  1. Tuesday, 17 May 2022 13:24 PM UTC
  2. PowerBuilder
  3. # 1

Hi Tracy,

Your code seems to be OK.

In your datawindow the names of header texts must be the same as column names with suffix "_t" (by default, see instance variable is_defaultheadersuffix of the service; changeable with of_SetDefaultHeaderSuffix).

Also you must not overwrite the clicked event of the datawindow control.

Check with debugger the pfc_clicked event of the sort service. If it doesn't stop something is wrong with inheritance. If it stops you can debug and see what's going wrong.

HTH,

René

 

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Tracy Lamb
  1. Tracy Lamb
  2. Tuesday, 17 May 2022 23:25 PM UTC
My column headers are all correct ... column name + "_t". I do not overwrite the clicked event. I put a break point in the sort service's pfc_clicked event.. it's not firing. I'm at a loss. In PB2019, PFC 5 this worked fine. In PB2021 I decided to upgrade to the latest PFC, that's the only thing that's changed.

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John Fauss
  1. John Fauss
  2. Wednesday, 18 May 2022 01:41 AM UTC
Are you tracing pfc_clicked in n_cst_dwsrv_sort or in pfc_n_cst_dwsrv_sort? The action is performed in pfc_n_cst_dwsrv_sort. Also, call the of_GetColumnHeader() returns Boolean function in the Sort service to ensure it returns True.
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René Ullrich
  1. René Ullrich
  2. Wednesday, 18 May 2022 05:03 AM UTC
The pfc_clicked event is triggered from datawindows clicked event (in pfc_u_dw). Try to start debugging there.
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John Fauss
John Fauss Accepted Answer Pending Moderation
  1. Tuesday, 17 May 2022 13:40 PM UTC
  2. PowerBuilder
  3. # 2

Hi, Tracy - 

You said: "I don't know how to pop-up the drag/drop sort window, either, without a separate menu option (Sort)."

There is an existing "Sort..." menu item in menu object m_master (under the View menu header). This menu item invokes the pfc_SortDlg() event in u_dw to display the Sort dialog window.

If you don't want to use this means of displaying the Sort dialog window, invoke u_dw's pfc_SortDlg() event by some other means.

Regards, John

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Tracy Lamb
  1. Tracy Lamb
  2. Tuesday, 17 May 2022 23:28 PM UTC
I added a "Sort List" option to the RMB menu on the dw... this works fine. I'm just trying to figure out why I can't click on a column header to sort the list.
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Arthur Hefti
Arthur Hefti Accepted Answer Pending Moderation
  1. Wednesday, 18 May 2022 04:19 AM UTC
  2. PowerBuilder
  3. # 3

Hi

did you check if the labels are enabled, i.e have "Enabled" checked.

Regards
Arthur

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Tracy Lamb
  1. Tracy Lamb
  2. Wednesday, 18 May 2022 12:07 PM UTC
Yes, all columns labels are enabled.
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Sivaprakash BKR
Sivaprakash BKR Accepted Answer Pending Moderation
  1. Wednesday, 18 May 2022 05:29 AM UTC
  2. PowerBuilder
  3. # 4

Tracy,

1.  Every column name, that need sorting, should be in a predefined style, eg. if the column name is address then column heading should be address_t.
2.  Then in the clicked event, write the following code.

String ls_name

SetRedraw(False)
If dwo.Type = "text" Then
	ls_name = dwo.Name
	ls_name = Left(ls_name, Len(ls_name) - 2)
	search_col_name = ls_name
	
	Choose Case Mid(Describe(ls_name + ".coltype"),1,5)
		Case 'char('
			This.SetSort(ls_name + " A")
		Case 'datet'
			This.Setsort(String(ls_name, 'yyyy/mm/dd') + " A")
		Case 'long'
			This.Setsort(ls_name + " A")
	End Choose
	This.Sort()
End If
SetRedraw(True)

HTH

Happiness Always
BKR Sivaprakash

Comment
Tracy Lamb
  1. Tracy Lamb
  2. Wednesday, 18 May 2022 12:06 PM UTC
I'm trying to use the PFC Sort service... it works fine in my last version, PB2019 and PFC5. I'm upgrading everything to PB2021/PFC 12.5.

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Miguel Leeuwe
Miguel Leeuwe Accepted Answer Pending Moderation
  1. Wednesday, 18 May 2022 09:39 AM UTC
  2. PowerBuilder
  3. # 5

Hi,

Like Arthur already said: make sure the column labels in the header are ENABLED.

Another thing you might want to look for, is if there are any OVERRIDEs in some scripts.

 

regards.

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John Fauss
John Fauss Accepted Answer Pending Moderation
  1. Wednesday, 18 May 2022 15:54 PM UTC
  2. PowerBuilder
  3. # 6

Forgive me if I'm asking the obvious, but is the DataWindow control in question a PFC u_dw user object?

Would you be willing to export (1) the DW data object and (2) the window, zip the exported source files and attach the zip file to a new response so that I and/or others can examine them?

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Tracy Lamb
  1. Tracy Lamb
  2. Wednesday, 18 May 2022 17:59 PM UTC
Yes, the DW control is a descendant of u_dw. I'll post the zip file in a response.

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Tracy Lamb
Tracy Lamb Accepted Answer Pending Moderation
  1. Wednesday, 18 May 2022 18:05 PM UTC
  2. PowerBuilder
  3. # 7

Attached is a zip file with the info requested earlier.

I have a utab_folder object, inherited from u_tab. 

A utab_customer inherited from utab_folder. 

On utab_folder, there are 4 tabs, on tab 2 there is 1 dw, dw_2 inherited from u_dw.  

In utab_customer, the data object is set to d_customer_equipment.

The utab_customer object is contained in w_folder_customer.

All 4 objects are in the attached zip file...

Attachments (1)
Appeon Support.zip
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