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#!/usr/bin/env python
import vtk
import inspect
import csv
import sys
from vtk.util.misc import vtkGetDataRoot
VTK_DATA_ROOT = vtkGetDataRoot()
def addToTree(cls, class_to_vertex_map, tree, names):
vertexid = None
if cls in class_to_vertex_map:
vertexid = class_to_vertex_map[cls]
else:
vertexid = tree.AddVertex()
class_to_vertex_map[cls] = vertexid
names.InsertValue(vertexid, cls)
return vertexid
def parseClassTree(classtree, tree, names):
class_to_vertex_map = dict()
for (parent, child) in classtree:
parentid = addToTree(parent, class_to_vertex_map, tree, names)
childid = addToTree(child, class_to_vertex_map, tree, names)
tree.AddGraphEdge(parentid, childid)
# The tree that will hold vtk class hierarchy
builder = vtk.vtkMutableDirectedGraph()
names = vtk.vtkStringArray()
names.SetName("name")
# Allocate 100 tuples to start with. I picked this number
# out of air.
names.SetNumberOfTuples(100)
# load vtk class information
reader = csv.reader(open(VTK_DATA_ROOT + "/Data/Infovis/classes.csv", 'r'))
classes = []
for row in reader:
classes.append(row)
# Convert list to tree
parseClassTree(classes, builder, names)
tree = vtk.vtkTree()
tree.CheckedShallowCopy(builder)
tree.GetVertexData().AddArray(names)
## Now iterate over the tree and print it
#iter = vtk.vtkTreeDFSIterator()
#iter.SetTree(tree)
#
#while iter.HasNext():
# id = iter.Next()
# mystr = tree.GetLevel(id) * " "
# print mystr + str(names.GetValue(id))
# Display the tree in the tree map viewer
view = vtk.vtkGraphLayoutView()
view.AddRepresentationFromInput(tree);
view.ResetCamera()
view.Render()
view.SetVertexLabelArrayName("name")
view.SetVertexLabelVisibility(True)
view.GetInteractor().Start()
win = vtk.vtkRenderWindow()
interact = vtk.vtkRenderWindowInteractor()
interact.SetRenderWindow(win)
view.SetRenderWindow(win)
win.Render()
win.GetInteractor().Initialize()
win.GetInteractor().Start();
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