question: private void childVis ( Node r ) { Edge e ; r . setVisible ( true ) ; if ( r . getCVisible ( ) ) { for ( int noa = 0 ; ( e = r . getChild ( noa ) ) != null ; noa ++ ) { childVis ( e . getTarget ( ) ) ; } } }
target:  Recursively goes through the tree and sets all the children and the parent to visible.