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setdropid_set_dropid_return_string_.htm
Navigation:  Language Reference > 13 - Built-in Functions >====== SETDROPID (set DROPID return string) ====== Previous pageReturn to chapter overviewNext page

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SETDROPID( string )

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SETDROPID Sets the DROPID procedure's return value.
string A string constant or variable containing the value the DROPID procedure will return.

The SETDROPID procedure sets the DROPID procedure's return value. This allows the DROPID procedure to pass the data in a drag-and-drop operation. When drag-and-drop operations are performed between separate Clarion applications, this is the mechanism to use to pass the data.

Example:

Que1 QUEUE

     STRING(30)

    END

Que2 QUEUE

     STRING(30)

    END

WinOne WINDOW,AT(0,0,160,400)

    LIST,AT(120,0,20,20),USE(?List1),FROM(Que1),DRAGID('List1')

                   !Allows drags, but not drops

    LIST,AT(120,120,20,20),USE(?List2),FROM(Que2),DROPID('List1')

                   !Allows drops from List1 or the Windows File Manager,

                   !but no drags

   END

CODE

OPEN(WinOne)

ACCEPT

 CASE EVENT()

 OF EVENT:Drag     !When a drag event is attempted

  IF DRAGID()      !check for success

   SETDROPID(Que1) !and setup info to pass

  END

 OF EVENT:Drop     !When drop event is successful

  Que2 = DROPID()  !get dropped info, from List1 or File Manager

  ADD(Que2)        !and add it to the queue

 END

END

See Also:

DRAGID

DROPID

setdropid_set_dropid_return_string_.htm.txt · Last modified: 2021/04/15 15:57 (external edit)