objective c - Drawing text above the divider in an NSSplitView, the top view will occasionally draw over it -

here's .swf (pardon, bad website , swf, way capture happening)

http://screencast.com/t/rzj3b5ihsj

what appears happening, divider drawn first, , top nsview in nssplitview draws on it. seems inconsistent, because divider draws on top.

here -drawdividerinrect method, overridden nssplitview

-(void) drawdividerinrect:(nsrect)arect {    [[nscolor colorwithred:10.0/255.0 green:10.0/255.0 blue:10.0/255.0 alpha:0.0] set];    nsrectfill(arect);     id topview = [[self subviews] objectatindex:0];    nsrect topviewframerect = [topview frame];     nsdictionary *attributes = [nsdictionary dictionarywithobjectsandkeys:[nsfont fontwithname:@"helvetica" size:26], nsfontattributename,[nscolor whitecolor], nsforegroundcolorattributename, nil];     nsattributedstring * currenttext=[[nsattributedstring alloc] initwithstring:@"tool properties" attributes: attributes];    nssize stringsize = [currenttext size];     cgfloat xoffset = ([topview frame].size.width - stringsize.width)/2;    nsrect textrect = nsmakerect(topviewframerect.origin.x+xoffset, topviewframerect.size.height+50, stringsize.width, stringsize.height);     [currenttext drawinrect:textrect]; } 

how can make divider & text within draws on top time?

so divider, , text wanted draw, being done on nssplitview itself. 2 views on either side of divider subviews, , there's no way draw in front of them. ended doing add padding @ bottom of top view divider text exposed