.

wcfs/internal/xbtree.py

@@ -459,8 +459,13 @@ def graphviz(t):
             # approach based on https://github.com/Felerius/btree-generator
             emit('  %s' % qq(symtab[node]))
             emit('  [')
-            emit('    shape = none')
-            emit('    label = <<table border="1" cellborder="0" cellspacing="0">')
+            emit('    shape = box')
+            emit('    margin = 0')
+            emit('    height = 0')
+            emit('    width  = 0')
+            if kind == 'T':
+                emit('    style = rounded')
+            emit('    label = <<table border="0" cellborder="0" cellspacing="0">')
             emit('                <tr>')
             for (j,key) in enumerate(node.keyv):
                 if kind == 'T':
@@ -484,7 +489,7 @@ def graphviz(t):
             if not isinstance(node, Tree):
                 continue
             for (j,child) in enumerate(node.children):
-                emit('%s:"con%d" -> %s' % (qq(symtab[node]), j, qq(symtab[child])))
+                emit('  %s:"con%d" -> %s' % (qq(symtab[node]), j, qq(symtab[child])))
 
     emit('}')
     emit('')