private JTree getTreeParam ( ) { if ( treeParam == null ) { treeParam = new JTree ( ) ; treeParam . setModel ( getTreeModel ( ) ) ; treeParam . setShowsRootHandles ( true ) ; treeParam . setRootVisible ( true ) ; treeParam . addTreeSelectionListener ( new javax . swing . event . TreeSelectionListener ( ) { @ Override public void valueChanged ( javax . swing . event . TreeSelectionEvent e ) { DefaultMutableTreeNode node = ( DefaultMutableTreeNode ) getTreeParam ( ) . getLastSelectedPathComponent ( ) ; if ( node == null ) { return ; } String name = ( String ) node . getUserObject ( ) ; showParamPanel ( name ) ; } } ) ; DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer ( ) ; renderer . setLeafIcon ( null ) ; renderer . setOpenIcon ( null ) ; renderer . setClosedIcon ( null ) ; treeParam . setCellRenderer ( renderer ) ; treeParam . setRowHeight ( DisplayUtils . getScaledSize ( 18 ) ) ; treeParam . addMouseListener ( new MouseAdapter ( ) { @ Override public void mousePressed ( MouseEvent e ) { TreePath path = treeParam . getClosestPathForLocation ( e . getX ( ) , e . getY ( ) ) ; if ( path != null && ! treeParam . isPathSelected ( path ) ) { treeParam . setSelectionPath ( path ) ; } } } ) ; } return treeParam ; }
This method initializes treeParam