Par2: Sorting a listbox on header click 1999-04-13 -- Arnor Baldvinsson In response to a question on lists from queues:
The code you need to sort, should be in the "NewSelection" embed on
the tab sheet:
Case Choice(?CurrentTab)
Of 1
Sort(MyQueue,MyQueue.Field1)
Of 2
Sort(MyQueue,MyQueue.Field2)
Of 3
Sort(MyQueue,MyQueue.Field1)
End
You can also have the listbox change sort order by clicking on the
header with some fairly simple code.
1. Alert the MouseLeft key on the listbox
2. Embed: Window event handling - PreAlertKey:
Cycle
3. Embed: Window event handling - AlertKey:
If ?List1{Proplist:MouseDownRow} = 0 ! Header
Case ?List1{Proplist:MouseDownField}
Of 1
Loc:Field = 1
Do ResortQueue
Of 2
Loc:Field = 2
Do ResortQueue
Of 3
Loc:Field = 3
Do ResortQueue
End
End
4. Embed: Procedure routines:
ResortQueue ROUTINE
Case Loc:Field
Of 1 ! Keyword alphabetical
Case Loc:SortOrder
Of 1
Sort(Glo:ResultQ,+Glo:RQKeyword)
Loc:SortOrder = 2
Of 2
Sort(Glo:ResultQ,-Glo:RQKeyword)
Loc:SortOrder = 1
End
Of 2 ! Word frequency
Case Loc:SortOrder
Of 1
Sort(Glo:ResultQ,+Glo:RQRelatedArticles)
Loc:SortOrder = 2
Of 2
Sort(Glo:ResultQ,-Glo:RQRelatedArticles)
Loc:SortOrder = 1
End
Of 3 ! Word length
Case Loc:SortOrder
Of 1
Sort(Glo:ResultQ,+Glo:RQWordLength)
Loc:SortOrder = 2
Of 2
Sort(Glo:ResultQ,-Glo:RQWordLength)
Loc:SortOrder = 1
End
End
Display
This toggles sort order of 3 fields in the queue when the user clicks
on the listbox header.
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