Occurs before a node in a TreeView DataWindow expands.
PowerBuilder event information Event ID: pbm_dwnexpanding
Expanding is not a standard PowerBuilder event. To write a script for this event, you must first define a user-defined event for the event ID pbm_dwnexpanding.
Argument |
Description |
|---|---|
row |
Long by value. The number of the first row in the group to be expanded. |
grouplevel |
Long by value. The TreeView level of the group to be expanded. |
Set the return code to affect the outcome of the event. Return 0 to continue processing (expand the selected node) or return any other value to cancel the expansion.
A TreeView node expands when the user clicks the State icon (+) in the TreeView DataWindow or uses any of the Expand methods.
The Expanding event occurs before the Expanded event.
The following statements in the Expanding event script display a message box that allows the user to cancel the operation:
Integer li_ret
li_ret = MessageBox("Expanding node", &
"Are you sure you want to expand this node?", &
Exclamation!, OKCancel!)
IF li_ret = 1 then
return 0
ELSE
RETURN 1
END IF
