Adicionado limite de classes de acordo com a quantidade de pastas do...

Adicionado limite de classes de acordo com a quantidade de pastas do pynovisao/data, contabiliza antes de criar o demo

src/interface/tk_interface.py

@@ -7,7 +7,7 @@
     Name: tk_interface.py
     Author: Alessandro dos Santos Ferreira ( santosferreira.alessandro@gmail.com )
 """
-
+import os
 import sys
 if sys.version_info[0] < 3:
     import Tkinter as Tk
@@ -22,7 +22,17 @@ from interface import Interface, InterfaceException as IException
 class TkInterface(Interface):
     """Implements graphical interface and functionalities using Tkinter."""
     
-    MAX_CLASSES = 20
+    directory = os.getcwd()
+
+    if(directory[-1] == '/'):
+        directory = directory[:-1]
+
+    path = directory[::-1].find("/")
+    directory = directory[:-path] + "data"
+    directory = os.listdir(directory)
+    
+    MAX_CLASSES = len(directory)
+    print MAX_CLASSES
     
     utils = tk_local.Utils