Expanding
event (DataWindows)
Description
Occurs before a node in a TreeView DataWindow expands.
PowerBuilder event
information
Event ID: pbm_dwnexpanding
|
Argument |
Description |
|---|---|
|
row |
Long by value. The number of the first row in the |
|
grouplevel |
Long by value. The TreeView level of the group to be |
Return Values
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.
Usage
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.
Examples
The following statements in the Expanding event script display a
message box that allows the user to cancel the operation:
|
1 2 3 4 5 6 |
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 0ELSE RETURN 1END IF |
See also