NSSplitView

@interface NSSplitView : NSView

 // Accessor Methods

   - (void)setIsPaneSplitter:(BOOL)flag;

   - (BOOL)isPaneSplitter;

   - (void)setDelegate:(id)anObject;

   - (id)delegate;

   - (void)setVertical:(BOOL)flag;

 // Instance Methods

   - (float)dividerThickness;

   - (BOOL)isVertical;

   - (void)adjustSubviews;

   - (void)drawDividerInRect:(NSRect)aRect;

   - (BOOL)isSubviewCollapsed:(NSView *)subview;

// Methods Implemented by the Delegate

   - (BOOL)splitView:(NSSplitView *)sender canCollapseSubview:(NSView *)subview;

   - (float)splitView:(NSSplitView *)sender constrainMaxCoordinate:(float)proposedCoord ofSubviewAt:(int)offset;

   - (float)splitView:(NSSplitView *)sender constrainMinCoordinate:(float)proposedCoord ofSubviewAt:(int)offset;

   - (void)splitView:(NSSplitView *)sender resizeSubviewsWithOldSize:(NSSize)oldSize;

   - (float)splitView:(NSSplitView *)splitView constrainSplitPosition:(float)proposedPosition ofSubviewAt:(int)index;

   - (void)splitViewDidResizeSubviews:(NSNotification *)notification;

   - (void)splitViewWillResizeSubviews:(NSNotification *)notification;

// Notifications

   NSSplitViewDidResizeSubviewsNotification;

   NSSplitViewWillResizeSubviewsNotification;