Esempio n. 1
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  def test_subgraphing(self):
    original_numbers = self._get_original_numbers()

    simple = Graph(name = 'simple')
    simple.add_node(x=0.0,   y=0.0,   name = 'A')
    simple.add_node(x=0.0,   y=1.0,   name = 'B')
    simple.connect('A', 'B', name = "I", directional = False)
    simple_copy = simple.copy(1.0, 0.0)
    super_graph = Graph(name = 'super_graph', graphs = [simple, simple_copy])
    super_graph.connect('simple:A', 'simple(copy):B', name = 'II', directional = True)

    nodes = [('simple:A', Node(0.0, 0.0)), ('simple:B', Node(0.0, 1.0)),
             ('simple(copy):A', Node(1.0, 0.0)), ('simple(copy):B', Node(1.0, 1.0))]
    edges = [('simple:I', Edge('simple:A', 'simple:B', directional = False)),
             ('simple(copy):I', Edge('simple(copy):A', 'simple(copy):B', directional = False)),
             ('II', Edge('simple:A', 'simple(copy):B', directional = True))]
    numbers = (4, # anchored_nodes
               3, # anchored_edges
               0, # unique_nodes
               1, # unique_anchored_edges
               0, # unique_unanchored_edges
               2, # subgraphs
               2  # anchored_subgraphs
              )
    self._check_graph(super_graph, 'super_graph', 'simple:A', True, nodes, edges, numbers)
    self._check_numbers(original_numbers, 8, 6, 3)
Esempio n. 2
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  def test_add_node(self):
    original_numbers = self._get_original_numbers()

    simple = Graph(name = 'simple')
    simple.add_node(x=0.0,   y=1.0,   name = 'A')

    nodes = [('A', Node(0.0, 1.0))]
    edges = []
    numbers = (1, # anchored_nodes
               0, # anchored_edges
               1, # unique_nodes
               0, # unique_anchored_edges
               0, # unique_unanchored_edges
               0, # subgraphs
               0  # anchored_subgraphs
              )
    self._check_graph(simple, 'simple', 'A', False, nodes, edges, numbers)
    self._check_numbers(original_numbers, 2, 0, 1)
Esempio n. 3
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  def __init__(self, name, systems = []):
    self.name = name
    self.graph = Graph(name = name)
    self.subsystems = systems

    self.unique_edges = []
    self.junctions = []
    self.connections = []
    self.connections_kwargs = []
    self.components = []
Esempio n. 4
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  def test_copy(self):
    original_numbers = self._get_original_numbers()

    simple = Graph(name = 'simple')
    simple.add_node(x=0.0,   y=0.0,   name = 'A')
    simple.add_node(x=0.0,   y=1.0,   name = 'B')
    simple.connect('A', 'B', name = "I", directional = False)
    simple_copy = simple.copy(0.0, 0.0)

    nodes = [('A', Node(0.0, 0.0)), ('B', Node(0.0, 1.0))]
    edges = [('I', Edge('A', 'B', directional = False))]
    numbers = (2, # anchored_nodes
               1, # anchored_edges
               2, # unique_nodes
               1, # unique_anchored_edges
               0, # unique_unanchored_edges
               0, # subgraphs
               0  # anchored_subgraphs
              )
    self._check_graph(simple_copy, 'simple(copy)', 'A', True, nodes, edges, numbers)
    self._check_numbers(original_numbers, 6, 3, 2)

    for node, node_copy in zip(simple.nodes.values(), simple_copy.nodes.values()):
      self.assertEqual(node, node_copy)
      self.assertIsNot(node, node_copy)
    for edge, edge_copy in zip(simple.edges.values(), simple_copy.edges.values()):
      self.assertEqual(edge, edge_copy)
      self.assertIsNot(edge, edge_copy)
Esempio n. 5
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  def __init__(self, center_of_rotation, **kwargs):
    Component.stats[self.__class__.__name__] += 1

    super(Component, self).__init__(center_of_rotation, **kwargs)
    Transformation.__init__(self, center_of_rotation, **kwargs)

    self.name = process_name(None, kwargs)
    self.label_string = self.name

    self.graph = Graph(name = self.name)
    self._get_nodes()
    self._connect_nodes()

    self.face_color = process_face_color((1.0, 1.0, 1.0), kwargs)
    self.edge_color = process_edge_color((0.0, 0.0, 0.0), kwargs)
    self.line_width = process_line_width(1.5, kwargs)
    self.patch = None

    self._points = []
    self._connections = []
Esempio n. 6
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  def test_connect(self):
    original_numbers = self._get_original_numbers()

    simple = Graph(name = 'simple')
    simple.add_node(x=0.0,   y=0.0,   name = 'A')
    simple.add_node(x=0.0,   y=1.0,   name = 'B', anchor = True)
    simple.connect('A', 'B', name = "I", directional = False)

    nodes = [('A', Node(0.0, 0.0)), ('B', Node(0.0, 1.0))]
    edges = [('I', Edge('A', 'B', directional = False))]
    numbers = (2, # anchored_nodes
               1, # anchored_edges
               2, # unique_nodes
               1, # unique_anchored_edges
               0, # unique_unanchored_edges
               0, # subgraphs
               0  # anchored_subgraphs
              )
    self._check_graph(simple, 'simple', 'B', True, nodes, edges, numbers)
    self._check_numbers(original_numbers, 4, 2, 1)
Esempio n. 7
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from __future__ import print_function
from schematics import ExampleDebugger

command_line_parser = ExampleDebugger("Reflected graph test case.")
command_line_parser.parse()

from schematics import Graph
from schematics import Canvas
import matplotlib.pyplot as plt
from math import sqrt

main = Graph(name="main")

main.add_node(x=0.0, y=0.0, name="A", ll="bottom")
main.add_node(x=1.0, y=0.0, name="B", ll="right")
main.add_node(x=1.0, y=1.0, name="C", ll="top")
main.add_node(x=0.0, y=1.0, name="D", ll="left")

main.connect("A", "B", name="1", ll="top", la=45.0, lp=1.0)
main.connect("B", "C", name="2", ll="top", la=45.0, lp=1.0)
main.connect("C", "D", name="3", ll="top", la=45.0, lp=1.0)
main.connect("D", "A", name="4", ll="top", la=45.0, lp=1.0)

main.anchor_graph()
print("Nodes are anchored:", main.anchored)
print(main.general_info(), "\n")
print(main)

graphs = []
graphs.append(main)
Esempio n. 8
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from schematics import ExampleDebugger
command_line_parser = ExampleDebugger('Reflected node labels.')
command_line_parser.parse()

from schematics import Graph
from schematics import Canvas
import matplotlib.pyplot as plt

main = Graph(name = 'main')

main.add_node(x=0.0,   y=0.0,   name = 'A',   ll = 'bottom')
main.add_node(x=1.0,   y=0.0,   name = 'B',   ll = 'right')
main.add_node(x=1.0,   y=1.0,   name = 'C',   ll = 'top')
main.add_node(x=0.0,   y=1.0,   name = 'D',   ll = 'left')

# BOTTOM
bottom = Graph(name = 'bottom')

bottom.add_node(x=0.5,   y=-1.0,
                name = 'angled name [x]',
                ll = 'bottom', la = 45.0)

bottom.add_node(x=0.5,   y=-1.0,
                name = 'angled (ref) [x]',
                ll = 'bottom', la = 45.0, ref = 'x')

bottom.add_node(x=0.5,   y=-2.0,
                name = 'angled name [y]',
                ll = 'bottom', la = 45.0)

bottom.add_node(x=0.5,   y=-2.0,
Esempio n. 9
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from schematics import ExampleDebugger
command_line_parser = ExampleDebugger('Labeled node test case.')
command_line_parser.parse()

from schematics import Graph
from schematics import Canvas
import matplotlib.pyplot as plt

main = Graph(name = 'main')

main.add_node(x=0.0,   y=0.0,   ll = 'bottom')
main.add_node(x=1.0,   y=0.0,   ll = 'right')
main.add_node(x=1.0,   y=1.0,   ll = 'top')
main.add_node(x=0.0,   y=1.0,   ll = 'left')

main.connect('Node 0', 'Node 1', label_location = 'bottom', label_angle = 30.0)
main.connect('Node 1', 'Node 2', label_location = 'top',    label_angle = 30.0)
main.connect('Node 2', 'Node 3', label_location = 'top',    label_angle = 30.0)
main.connect('Node 3', 'Node 0', label_location = 'top',    label_angle = 30.0)

print main.edges

GRAPH = Graph(name = 'graph', graphs = [main], node_line_width = 2.0, node_radius = 0.05)
GRAPH.anchor_graph()
print 'Nodes are anchored:', GRAPH.anchored
print GRAPH.general_info(), '\n'
print GRAPH

CAN = Canvas(border_thickness = 0.05, grid = True)
CAN.add_graph(GRAPH)
Esempio n. 10
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  def test_copying_with_subgraphing(self):
    original_numbers = self._get_original_numbers()

    pipe1 = Graph(name = 'pipe1')
    pipe1.add_node(x=0.0, y=0.0, name = 'inlet')
    pipe1.add_node(1.0, 0.0, name = 'outlet')
    pipe2 = pipe1.copy(x=1.5, y=0.0, name = 'pipe2')
    long_pipe1 = Graph(name = 'long_pipe1', graphs = [pipe1, pipe2])
    long_pipe1.connect('pipe1:outlet', 'pipe2:inlet', name = "junction")
    long_pipe1.connect('pipe1:inlet', 'pipe1:outlet', name = "internal-connection1", directional = False)
    long_pipe1.connect('pipe2:inlet', 'pipe2:outlet', name = "internal-connection2", directional = False)
    long_pipe2 = long_pipe1.copy(x=2.5, y=1.0, name = 'long_pipe2')
    long_pipe2.reflect(axis = 'y')
    circuit = Graph(name = 'circuit', graphs = [long_pipe1, long_pipe2])
    circuit.connect('long_pipe1:pipe2:outlet', 'long_pipe2:pipe1:inlet', name = "junction1")
    circuit.connect('long_pipe2:pipe2:outlet', 'long_pipe1:pipe1:inlet', name = "junction2")

    nodes = [('long_pipe1:pipe1:inlet',  Node(0.0, 0.0)),
             ('long_pipe1:pipe1:outlet', Node(1.0, 0.0)),
             ('long_pipe1:pipe2:inlet',  Node(1.5, 0.0)),
             ('long_pipe1:pipe2:outlet', Node(2.5, 0.0)),
             ('long_pipe2:pipe1:inlet',  Node(2.5, 1.0)),
             ('long_pipe2:pipe1:outlet', Node(1.5, 1.0)),
             ('long_pipe2:pipe2:inlet',  Node(1.0, 1.0)),
             ('long_pipe2:pipe2:outlet', Node(0.0, 1.0))]
    edges = [('long_pipe1:junction', Edge('long_pipe1:pipe1:outlet', 'long_pipe1:pipe2:inlet', directional = True)),
             ('long_pipe1:internal-connection1', Edge('long_pipe1:pipe1:inlet', 'long_pipe1:pipe1:outlet', directional = False)),
             ('long_pipe1:internal-connection2', Edge('long_pipe1:pipe2:inlet', 'long_pipe1:pipe2:outlet', directional = False)),
             ('long_pipe2:junction', Edge('long_pipe2:pipe1:outlet', 'long_pipe2:pipe2:inlet', directional = True)),
             ('long_pipe2:internal-connection1', Edge('long_pipe2:pipe1:inlet', 'long_pipe2:pipe1:outlet', directional = False)),
             ('long_pipe2:internal-connection2', Edge('long_pipe2:pipe2:inlet', 'long_pipe2:pipe2:outlet', directional = False)),
             ('junction1', Edge('long_pipe1:pipe2:outlet', 'long_pipe2:pipe1:inlet', directional = True)),
             ('junction2', Edge('long_pipe2:pipe2:outlet', 'long_pipe1:pipe1:inlet', directional = True))]
    numbers = (8, # anchored_nodes
               8, # anchored_edges
               0, # unique_nodes
               2, # unique_anchored_edges
               0, # unique_unanchored_edges
               2, # subgraphs
               2  # anchored_subgraphs
              )
    self._check_graph(circuit, 'circuit', 'long_pipe1:pipe1:inlet', True, nodes, edges, numbers)
    self._check_numbers(original_numbers, 16, 16, 7)
Esempio n. 11
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from schematics import ExampleDebugger
command_line_parser = ExampleDebugger('A basic junction.')
command_line_parser.parse()

from schematics import Graph
from schematics import Canvas
import matplotlib.pyplot as plt
from math import sqrt

component1 = Graph(name = 'component1')
component1.add_node(x=0.0,   y=0.0,   name = 'outlet',   ll = 'bottom')

component2 = Graph(name = 'component2')
component2.add_node(x=1.0,   y=1.0,   name = 'inlet',   ll = 'right')

junction = Graph(name = 'junction')
junction.add_node(x=1.0,   y=0.0,   name = 'node',   ll = 'bottom', draw = False)

system1 = Graph(name = 'system1', graphs = [component1, component2, junction])
system1.connect('component1:outlet', 'junction:node', dir = False, ll = 'top')
system1.connect('junction:node', 'component2:inlet',  dir = True,  ll = 'top')

system2 = system1.copy(2.0, 0.0, name = 'system2')
system2.rotate(45.0)

# -----

component1 = Graph(name = 'component1')
component1.add_node(x=0.0,   y=2.0,   name = 'outlet',   ll = 'bottom')

component2 = Graph(name = 'component2')
Esempio n. 12
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from __future__ import print_function
from schematics import ExampleDebugger
command_line_parser = ExampleDebugger('Pentagon graph test case.')
command_line_parser.parse()

from schematics import Graph
from schematics import Canvas

GRAPH = Graph(name = 'pentagon')

# Add Nodes
GRAPH.add_node(x=0.0,   y=0.0,   name = 'A', anchor = True, ll = 'top')
GRAPH.add_node(x=0.75,  y=-1.5,  name = 'B', ll = 'bottom')
GRAPH.add_node(x=-1.5,  y=-0.75, name = 'C', ll = 'left')
GRAPH.add_node(x=1.5,   y=-0.75, name = 'D', ll = 'right')
GRAPH.add_node(x=-0.75, y=-1.5,  name = 'E', ll = 'bottom')

# Add Connections
GRAPH.connect('A', 'B', name = "I", directional = False, ll = 'top')
GRAPH.connect('C', 'A', name = "II", ll = 'top')
GRAPH.connect('A', 'D', name = "III", ll = 'top')
GRAPH.connect('A', 'E', name = "IV", directional = False, ll = 'top')

GRAPH.connect('B', 'C', name = "V", directional = False, ll = 'top')
GRAPH.connect('D', 'B', name = "VI", ll = 'bottom')
GRAPH.connect('B', 'E', name = "VII", ll = 'bottom')

GRAPH.connect('C', 'D', name = "VIII", directional = False, ll = 'top')
GRAPH.connect('E', 'C', name = "IX", ll = 'bottom')

GRAPH.connect('D', 'E', name = "X", directional = False, ll = 'top')
Esempio n. 13
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from schematics import ExampleDebugger
command_line_parser = ExampleDebugger('Shifting edge label.')
command_line_parser.parse()

from schematics import Graph
from schematics import Canvas
import matplotlib.pyplot as plt
from math import sqrt

main = Graph(name = 'main')

main.add_node(x=0.0,   y=0.0,   name = 'A',   ll = 'bottom')
main.add_node(x=1.0,   y=0.0,   name = 'B',   ll = 'right')

main.connect('A', 'B', name = '1', ll = 'top', la = 0.0, label_shift = 0.75)

graphs = []
displacement = 3.0

for i in range(2):
  graphs.append( main.copy(i * displacement, 0.0) )
  graphs[-1].rotate(i * 45.0)

main.connect('A', 'B', name = '1', ll = 'bottom', la = 0.0, label_shift = -0.75)
for i in range(2):
  graphs.append( main.copy(i * displacement, 2.0) )
  graphs[-1].rotate(i * 45.0)

CAN = Canvas(border_thickness = 0.05, grid = True)
for graph in graphs:
  CAN.add_graph(graph)
Esempio n. 14
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class System(object):
  subsystems = []

  def __init__(self, name, systems = []):
    self.name = name
    self.graph = Graph(name = name)
    self.subsystems = systems

    self.unique_edges = []
    self.junctions = []
    self.connections = []
    self.connections_kwargs = []
    self.components = []


  def add_component(self, component):
    # supress component graph drawing
    for node in component.graph.nodes.values():
      node.draw_bool = False
      node.draw_label_bool = False
    for edge in component.graph.edges.values():
      edge.draw_bool = False
      edge.draw_label_bool = False
    self.graph.add_graph(component.graph)
    self.components.append(component)


  def add_node(self, x, y, **kwargs):
    name = self.graph.add_node(x, y, **kwargs)
    self.graph.nodes[name].draw_bool = False
    self.graph.nodes[name].draw_label_bool = False


  def _already_existing_edge(self, nodeA, nodeB):
    tmp_edge = Edge(nodeA, nodeB)
    for edge in self.unique_edges:
      if tmp_edge == self.graph.edges[edge]:
        return edge
    return None


  def connect(self, *nodes, **kwargs):
    self.connections.append(nodes)
    self.connections_kwargs.append(kwargs)

    number_of_nodes = len(nodes)
    iterations = number_of_nodes - 1
    last_iteration = iterations - 1

    junction_edges = []
    for i in range(iterations):
      name = self._already_existing_edge(nodes[i], nodes[i+1])
      if name is None:
        if i == last_iteration:
          name = self.graph.connect(nodes[i], nodes[i+1], directional = True, draw_label = False)
        else:
          name = self.graph.connect(nodes[i], nodes[i+1], directional = False, draw_label = False)
        self.unique_edges.append(name)
      junction_edges.append(name)

    self.junctions.append( Junction(junction_edges, **kwargs) )


  def move(self, x, y):
    displacement = Node(x, y) - self.graph.nodes[self.graph.anchor]
    for node in self.graph.unique_nodes:
      self.graph.nodes[node].x += displacement.x
      self.graph.nodes[node].y += displacement.y
    for component in self.components:
      new_coords = component.center_of_rotation + displacement
      component.move(new_coords.x, new_coords.y)


  def copy(self, x=0.0, y=0.0, **kwargs):
    name = process_name(self.name + '(copy)', kwargs)

    duplicate = System(name, systems = self.subsystems)

    for component in self.components:
      duplicate.add_component(deepcopy(component))

    for name in self.graph.unique_nodes:
      duplicate.add_node(self.graph.nodes[name].x, self.graph.nodes[name].y, name = name)

    for connection, kwargs in zip(self.connections, self.connections_kwargs):
      duplicate.connect(*connection, **kwargs)

    duplicate.move(x, y)
    return duplicate
Esempio n. 15
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from schematics import ExampleDebugger
command_line_parser = ExampleDebugger('Compounded graph test case.')
command_line_parser.parse()

from schematics import Graph
from schematics import Canvas


# ------------- pipe1

pipe1 = Graph(name = 'pipe1')

pipe1.add_node(x=0.0, y=0.0, name = 'inlet')
pipe1.add_node(1.0, 0.0, name = 'outlet')

# pipe1.connect('inlet', 'outlet', name = 'internal', directional = False)

pipe1.anchor = 'inlet'


# ------------- pipe2

pipe2 = pipe1.copy(x=1.5, y=0.0, name = 'pipe2')

pipe2.anchor = 'inlet'


# ------------- long_pipe1

long_pipe1 = Graph(name = 'long_pipe1', graphs = [pipe1, pipe2])
Esempio n. 16
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from schematics import ExampleDebugger
command_line_parser = ExampleDebugger('Labeled edge.')
command_line_parser.parse()

from schematics import Graph
from schematics import Canvas
import matplotlib.pyplot as plt
from math import sqrt

main = Graph(name = 'main')

main.add_node(x=0.0,   y=0.0,   name = 'A',   ll = 'bottom')
main.add_node(x=1.0,   y=0.0,   name = 'B',   ll = 'right')
main.add_node(x=1.0,   y=1.0,   name = 'C',   ll = 'top')
main.add_node(x=0.0,   y=1.0,   name = 'D',   ll = 'left')

main.connect('A', 'B', name = '1', ll = 'top', la = 0.0)
main.connect('B', 'C', name = '2', ll = 'top', la = 0.0)
main.connect('C', 'D', name = '3', ll = 'top', la = 0.0)
main.connect('D', 'A', name = '4', ll = 'top', la = 0.0)

main.anchor_graph()
print 'Nodes are anchored:', main.anchored
print main.general_info(), '\n'
print main

graphs = []
displacement = 3.0

for i in range(2):
  graphs.append( main.copy(i * displacement, 0.0) )
Esempio n. 17
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from schematics import ExampleDebugger
command_line_parser = ExampleDebugger('Detailed node label.')
command_line_parser.parse()

from schematics import Graph
from schematics import Canvas
import matplotlib.pyplot as plt

main = Graph(name = 'main')

main.add_node(x=0.0, y=0.0, name = 'test0', ll = 'bottom', lp = 0.0)
main.add_node(x=0.0, y=0.0, name = 'test1', ll = 'top',    lp = 0.0)
main.add_node(x=0.0, y=0.0, name = 'test2', ll = 'left',   lp = 0.0)
main.add_node(x=0.0, y=0.0, name = 'test3', ll = 'right',  lp = 0.0)

bounding = Graph(name = 'bounding')

disp = 0.1
bounding.add_node(x=disp,  y=0.0, name = 'top',    dl = False)
bounding.add_node(x=-disp, y=0.0, name = 'bottom', dl = False)
bounding.add_node(x=0.0, y=-disp, name = 'left',   dl = False)
bounding.add_node(x=0.0, y=disp,  name = 'right',  dl = False)

GRAPH = Graph(name = 'graph', graphs = [main, bounding])

CAN = Canvas(border_thickness = 0.0, grid = True)
CAN.add_graph(GRAPH)

CAN.draw(save_file = 'test.pdf', display = True, print_information = False)
Esempio n. 18
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class Component(Label, Transformation):
  stats = {}

  def _connect_nodes(self):
    connected_pairs = []
    for node0 in self.graph.nodes.keys():
      for node1 in self.graph.nodes.keys():
        if node0 != node1:
          pair0 = (node0, node1)
          pair1 = (node1, node0)
          if pair0 not in connected_pairs and pair1 not in connected_pairs:
            connected_pairs.append(pair0)
            self.graph.connect(node0, node1, directional = False)


  def __init__(self, center_of_rotation, **kwargs):
    Component.stats[self.__class__.__name__] += 1

    super(Component, self).__init__(center_of_rotation, **kwargs)
    Transformation.__init__(self, center_of_rotation, **kwargs)

    self.name = process_name(None, kwargs)
    self.label_string = self.name

    self.graph = Graph(name = self.name)
    self._get_nodes()
    self._connect_nodes()

    self.face_color = process_face_color((1.0, 1.0, 1.0), kwargs)
    self.edge_color = process_edge_color((0.0, 0.0, 0.0), kwargs)
    self.line_width = process_line_width(1.5, kwargs)
    self.patch = None

    self._points = []
    self._connections = []


  def _get_path_data(self):
    Path = mpath.Path
    self._path_data = [(Path.MOVETO, self._points[0].to_tuple())]
    point_index = 0
    last_point_index = len(self._points) - 1
    last_connection_index = len(self._connections) - 1

    for connection_index, connection in enumerate(self._connections):
      connection = connection.lower()
      # Line
      if connection == 'lineto':
        point_index += 1
        if point_index <= last_point_index:
          self._path_data.append( (Path.LINETO, self._points[point_index].to_tuple()) )
        elif connection_index == last_connection_index:
          self._path_data.append( (Path.LINETO, self._points[0].to_tuple()) )
        else:
          sys.exit("Error: Incorrect point and connection specification in custom" +
                   "shape component " + self.__class__.__name__ + ". Ran out of " +
                   "points before all connections could be made.")

      # Quadratic Bezier Curve
      elif connection == 'curve3':
        for i in range(2):
          point_index += 1
          if point_index <= last_point_index:
            self._path_data.append( (Path.CURVE4, self._points[point_index].to_tuple()) )
          elif (connection_index == last_connection_index) and (i == 1):
            self._path_data.append( (Path.CURVE4, self._points[0].to_tuple()) )
          else:
            sys.exit("Error: Incorrect point and connection specification in custom" +
                     "shape component " + self.__class__.__name__ + ". Ran out of " +
                     "points before all connections could be made.")

      # Cubic Bezier Curve
      elif connection == 'curve4':
        for i in range(3):
          point_index += 1
          if point_index <= last_point_index:
            self._path_data.append( (Path.CURVE4, self._points[point_index].to_tuple()) )
          elif (connection_index == last_connection_index) and (i == 2):
            self._path_data.append( (Path.CURVE4, self._points[0].to_tuple()) )
          else:
            sys.exit("Error: Incorrect point and connection specification in custom" +
                     "shape component " + self.__class__.__name__ + ". Ran out of " +
                     "points before all connections could be made.")

      else:
        sys.exit("Error: Invalid connection specification in custom shape component "
                 + self.__class__.__name__ + ".")

      if connection_index == last_connection_index:
        if point_index != len(self._points):
          sys.exit("Error: Incorrect point and connection specification in custom" +
                   "shape component " + self.__class__.__name__ + ". Too many points " +
                   "specified for the connection types.")

    self._path_data.append( (Path.CLOSEPOLY, self._points[0].to_tuple()) )


  def move(self, x, y):
    self.center_of_rotation.x = x
    self.center_of_rotation.y = y


  def _get_shape(self):
    for point in self._points:
      self._reflect(point)
      self._rotate(point)

    self._get_path_data()

    self._codes, self._verts = zip(*self._path_data)
    self.path = mpath.Path(self._verts, self._codes)


  def draw_component(self):
    self._get_shape()
    self.graph.move(self.center_of_rotation.x, self.center_of_rotation.y)
    self.graph.reflect(self.reflect)
    self.graph.rotate(self.angle)

    self.patches = [mpatches.PathPatch(self.path, facecolor = self.face_color, edgecolor = self.edge_color, linewidth = self.line_width)]
    return self.patches


# Error messages
  def _get_nodes(self):
    sys.exit('Error: Must define "_get_nodes" method in the ' + self.__class__.__name__ + ' class.')