Hi All,

   We had discussions in IPROF'96 and HPWorld'97 SIGVPLUS on the Scrollable
   Picklist enhancement for VPLUS. Based on the feedback from those
   sessions now we have the revised proposal for this group's discussion.

   Please feel free to send your comments before May 19. I will summarize the
   comments and post to 3000-L mailing list.

   Looking forward to your valuable comments and suggestions.

Thanks for your continued support and encouragement,

Gopi ([log in to unmask])
CSY R&D India, Bangalore.

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   Scrollable Picklist in VPLUS [Enhancement proposal]
   Dated: 2 May 1997
   [* This is only a proposal and it is subject to change *]


   This enhancement is to provide a facility for a scrollable pop-up window
   which can be used for a pick list in conjunction with VPLUS forms.

   The following requirements will be met by the implementation of this
   enhancement.

   1. The pop-up window should be able to overlay a part of the screen.
   2. The pop-up window should display text on several rows and allow the user
      to select the text on any row.
   3. The window should provide a facility for scrolling so that additional
      rows of text can be displayed.
   4. The display and interaction with the window should be in block mode.

   We propose to bundle this functionality into an intrinsic. The intrinsic
   will be similar in structure to existing intrinsics in VPLUS. This
   intrinsic can be called by applications in languages supported by VPLUS.

   When this intrinsic is callled  by an application, a window pops up on
   the screen. Up and Down arrow keys may be used to position the cursor on
   the text to be selected. Function keys (or Enter key) will be used to
   scroll the text in the window. Function keys and/or Enter key will be
   provided to either select the text at the cursor position or quit. The
   location and size of the window can be specified through the intrinsic call.

   This functionality will be supported for DTC-connected HP 700/9X
   terminals.


   Proposed intrinsic sketch:

   VSCROLL(comarea, startrow, startcol, numrows, numcols, text)

   comarea

   startrow    Starting row of the left top corner corner of the
               pop-up window

   startcol    Starting column of the left top corner of the pop-up
               window

   numrows     Suggested number of text rows to display in the pop-up
               window. Window is limited by the physical rows available
               for the screen.

   numcols     Suggested number of text columns to display in the pop-up
               window.Window is limited by the physical columns available
               for the screen.

   text        Return parameter.

               Text to be displayed in the pop-up window is read from the file
               HPPOPUP.PUB.SYS and selected text is returned in this parameter.

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