Posted before an NSSplitView changes the sizes of some or all of its subviews.
Note: In Mac OS X v10.5 and later if the notification is sent because the user is dragging a divider, the userInfo dictionary contains a key @"NSSplitViewDividerIndex" containing an NSInteger-wrapped NSNumber that is the index of the divider being dragged. Earlier versions of Mac OS X do not return a user info dictionary in any situation.
Available in Mac OS X v10.0 and later.
- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)