Module Dfpcklst.pkg

************************************************************************ Copyright (c) 1997 Data Access Corporation, Miami Florida, All rights reserved. DataFlex is a registered trademark of Data Access Corporation. 08/19/94 JJT - Blended Classes from CB and DAF ************************************************************************ 3.1 Changes 07/23/96 JJT - New Class names 05/31/96 JJT - added layer so image passing is optional 03/28/95 JJT - Removed Layer for 0 class changed name to dfpcklst.pkg ************************************************************************

Dfpcklst.pkg (view source)
• import declarations
  • Dfwide.pkg (view source)
  • picklist.pkg (view source)
• PickList_ : WideList
• PickList : Picklist_
  • Construct_Object()
    Inherited from pick_list_mixin
    • IntegerScrollOnThumbTrackState
      Added for new scroll bar support. Only support batch style This determines if the scroll occurs when the thumb is dragged When false, it scrolls when the thumb is released. Only set it to false if the scroll takes a long time.
    • IntegerThumbScrollState
      This determines if thumb should be sized proportionally to the scroll area. When true it acts like a normal windows list. When false, you get old vdf behavior where thumb is small and scroll moves up down one line at a time
    • IntegerCustomScrollState
      If the developer wishes to augment the vScroll messages they can shut the existing customizations by setting this true
  • Mouse_Up()
  • Mouse_Click()
  • SetVScrollInfo(Integer iMin Integer iMax Integer iPage)
    Added for new scroll bar support. Only support batch style
  • SetVScrollPos(Integer iPos)
  • SetVScrollbox(Integer iType Integer iData)
    • IntegeriPos
    • IntegeriTop
    • IntegerbFast
  • set(integer iNewTop integer iNewCurrent)
    Inherited from list_mixin
    the DFBaseEntryList class has it's own special Set_Top_item message (as of 9.0) which does not set current_item. When used for non-batch lists, we don't want the set_current_item and that is why it was removed. This fixes a problem when scrolling down/up when the entire grid is shifted horizontally to the right. When you scroll, the grid would shift to col 0. However, with batch lists we want the normal set_top_item or we get other problems. So we we modify the method here to make it do a normal top_item (ie. set current_item). While this top_item addition was added in 9.0 for DataLists classes it was not added to PickList classes, which is the other branch off of Widelist. Since Picklists are always non-batch, this setting of current_item is required and was added as of 11.1

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