Copyright © 2008, 2009 Arndt Roger Schneider
'indentx' and 'indenty' are used to define the minimal space between two nodes (indentx between leaf and node).
The entire hierarchy will be redrawn, whenever 'indentx' and or 'indenty' is set.
Either '0' or '1'. Root defines whether there is a visible parent node (the root node) for the hierarchy or not. If '0' is specified the single root node will be omitted. The nodes underneath root will then appear as roots of independent hierarchies.
The entire hierarchy will be redrawn, whenever 'root' is set.
Either '0' or '1'. The 'glyphs' property tells the Rtl_tree to replace the provided images with »glyphs«.
The »glyphs« and the providing font have to be specified inside the »option database«.
The entire hierarchy will be redrawn after 'foreground' or 'background' was set.
On demand node management. These »callback« functions are called to refresh the data inside the the Rtl_tree.