Occurs before a node in a TreeView DataWindow collapses.
PowerBuilder event information Event ID: pbm_dwncollapsing
Argument |
Description |
|---|---|
row |
Long by value. The number of the first row in the group to be collapsed. |
grouplevel |
Long by value. The TreeView level of the group to be collapsed. |
Set the return code to affect the outcome of the event. Return 0 to continue processing (collapse the selected node) or return any other value to cancel the collapse.
A TreeView node collapses when the user clicks the State icon (-) in the TreeView DataWindow or uses any of the Collapse methods.
The Collapsing event occurs before the Collapsed event.
The following statements in the Collapsing event script display a message box that allows the user to cancel the operation. The message box does not display if the Collapsing event was triggered by the CollapseAll or CollapseLevel methods:
Integer li_ret
if row <>-1 then
li_ret = MessageBox("Collapsing node", &
"Are you sure you want to collapse this node?", &
Exclamation!, OKCancel!)
IF li_ret = 1 then
return 0
ELSE RETURN 1 END IF END IF
