def on_node_press(self, event):
"""Being drag of an object"""
# record the item and its location
if self.action == AutomatonAction.Add_State:
self._drag_data["item"] = self.canvas.find_closest(event.x, event.y)[0]
tag = self.canvas.gettags(self.canvas.find_closest(event.x, event.y)[0])[0]
if tag[0:4] == TAGC:
self._drag_data["item2"] = self.canvas.find_withtag(TAGT + str(tag[4:]))
elif tag[0:4] == TAGT:
self._drag_data["item2"] = self.canvas.find_withtag(TAGC + str(tag[4:]))
self._drag_data["x"] = event.x
self._drag_data["y"] = event.y
elif self.action == AutomatonAction.Add_Transition:
tag = self.canvas.gettags(self.canvas.find_closest(event.x, event.y)[0])[0]
self.transitionBind = TransitionBind(self.automaton.nodes[int(tag[4:])])
self.canvas.create_line(event.x, event.y, event.x, event.y, tag="templine")
print("press")
elif self.action == AutomatonAction.Set_Initial:
# reset all nodes to normal state
for node in self.automaton.nodes:
if node.state == NodeState.Initial:
node.state = NodeState.NoState
self.canvas.itemconfig(self.canvas.find_withtag(TAGC + str(node.name)), fill=COLOR_NORMAL)
tag = self.canvas.gettags(self.canvas.find_closest(event.x, event.y)[0])[0]
if tag[0:4] == TAGC:
self.automaton.set_node_state(tag[4:], NodeState.Initial)
self.canvas.itemconfig(self.canvas.find_closest(event.x, event.y)[0], fill=COLOR_INITIAL)
elif self.action == AutomatonAction.Set_Final:
tag = self.canvas.gettags(self.canvas.find_closest(event.x, event.y)[0])[0]
if tag[0:4] == TAGC:
self.automaton.set_node_state(tag[4:], NodeState.Final)
self.canvas.itemconfig(self.canvas.find_closest(event.x, event.y)[0], fill=COLOR_FINAL)
class AutomatonRender(Tk):
def __init__(self, *args, **kwargs):
Tk.__init__(self, *args, **kwargs)
self.automaton = Automaton()
self.action = AutomatonAction.No_Action
self.transitions = []
self.quit_dialog = None
# create a canvas
self.canvas = Canvas(bg="white", width=640, height=480)
self.canvas.pack(fill="both", expand=True)
self._drag_data = {"x": 0, "y": 0, "item": None}
self.init_menu()
def init_menu(self):
frame = Frame(self, bg='grey')
frame.pack(side=TOP, fill=BOTH)
menu = Menu(self, tearoff=False)
file_menu = Menu(self, tearoff=False)
about_menu = Menu(self, tearoff=False)
menu.add_cascade(label="File", underline=0, menu=file_menu)
menu.add_cascade(label="About", underline=0, menu=about_menu)
file_menu.add_command(label="New File", underline=1, command=self.new_automaton)
file_menu.add_command(label="Save", underline=1, command=self.save_automaton)
file_menu.add_command(label="Load", underline=1, command=self.load_automaton)
file_menu.add_command(label="Exit", underline=1, command=self.exit_window)
about_menu.add_command(label="About", underline=1, command=self.about)
self.config(menu=menu)
cursor = Button(frame, text='Cursor', command=self.cursor_state_press, padx=20)
cursor.pack(pady=20, padx=20, side=LEFT)
add_state = Button(frame, text='Add state', command=self.add_state_press, padx=20)
add_state.pack(pady=20, padx=20, side=LEFT)
add_transition = Button(frame, text='Set transition', command=self.add_transition_press, padx=20)
add_transition.pack(pady=20, padx=20, side=LEFT)
set_initial = Button(frame, text='Set initial', command=self.set_initial_state_press, padx=20)
set_initial.pack(pady=20, padx=20, side=LEFT)
set_final = Button(frame, text='Set final', command=self.set_final_state_press, padx=20)
set_final.pack(pady=20, padx=20, side=LEFT)
# add_input = Button(frame, text='Add Input', command=self., padx=20)
# add_input.pack(pady=20, padx=20, side=LEFT)
check_dfa = Button(frame, text='Check automata', command=self.check_automaton, padx=20)
check_dfa.pack(pady=20, padx=20, side=LEFT)
@staticmethod
def about():
os.startfile("E:\\document.pdf", 'open')
def exit_window(self):
if self.automaton.nodes:
self.quit_dialog = QuitDialog(self.canvas,
text="Would you like to save before exiting?",
buttons=["Yes", "No", "Cancel"],
actions=[self.save_automaton, sys.exit, sys.exit],
default=0,
cancel=self.save_automaton,
title="Quit dialog")
self.quit_dialog.go()
else:
sys.exit(0)
def new_automaton(self):
self.automaton = Automaton()
self.canvas.delete("all")
def load_automaton(self):
filename = filedialog.askopenfilename()
self.canvas.delete("all")
self.automaton.load(filename)
self.draw_automaton()
def check_automaton(self):
if self.automaton.is_nfa():
messagebox.showinfo("Automata", " The automate is NFA ")
else:
messagebox.showinfo("Automata", " The automate is DFA ")
def save_automaton(self):
save_file = filedialog.asksaveasfilename()
self.automaton.save(save_file + ".pkl")
def cursor_state_press(self):
self.action = AutomatonAction.Add_State
def add_state_press(self):
self.action = AutomatonAction.Add_State
node = self.automaton.add_node()
self._draw_node(node, COLOR_NORMAL)
def add_transition_press(self):
self.action = AutomatonAction.Add_Transition
def set_initial_state_press(self):
self.action = AutomatonAction.Set_Initial
def set_final_state_press(self):
self.action = AutomatonAction.Set_Final
# def add_input_press(self):
def draw_automaton(self):
for node in self.automaton.nodes:
if node.state == NodeState.Initial:
self._draw_node(node, COLOR_INITIAL)
elif node.state == NodeState.Final:
self._draw_node(node, COLOR_FINAL)
else:
self._draw_node(node, COLOR_NORMAL)
for transition in node.transitions:
if transition.node.name == node.name:
self._draw_arc(node, transition.name)
else:
self._draw_line(node, transition.node, transition.name, "black")
def _draw_node(self, node, color):
"""Create a node at the given coordinate in the given color"""
x = node.x
y = node.y
self.canvas.create_oval(x - 25, y - 25, x + 25, y + 25,
outline="red", fill=color, tags=TAGC + str(node.name))
self.canvas.create_text(x, y, text="q" + str(node.name), tags=TAGT + str(node.name))
self.canvas.tag_bind(TAGC + str(node.name), BUTTON_LEFT_PRESS, self.on_node_press)
self.canvas.tag_bind(TAGC + str(node.name), BUTTON_LEFT_RELEASE, self.on_node_release)
self.canvas.tag_bind(TAGC + str(node.name), MOUSE_MOTION, self.on_node_move)
self.canvas.tag_bind(TAGT + str(node.name), BUTTON_LEFT_PRESS, self.on_node_press)
self.canvas.tag_bind(TAGT + str(node.name), BUTTON_LEFT_RELEASE, self.on_node_release)
self.canvas.tag_bind(TAGT + str(node.name), MOUSE_MOTION, self.on_node_move)
def _draw_line(self, first_node, second_node, transaction_name, color):
"""Create a token at the given coordinate in the given color"""
x1 = first_node.x
y1 = first_node.y
x2 = second_node.x
y2 = second_node.y
coef = 0;
for transaction in second_node.transitions:
if transaction.node.name == first_node.name:
coef = 20
break
middle_distance_point = (x1 + x2) / 2, (y1 + y2) / 2 + int(coef)
points = [(x1, y1 + coef), (x2, y2 + coef)]
self.canvas.create_line(points,
tag=str(first_node.name) + ":" + str(second_node.name), arrow="last")
self.canvas.create_text(middle_distance_point,
text="" + str(transaction_name) + " (" + str(first_node.name) + "->" + str(
second_node.name) + ")",
tag="t" + str(first_node.name) + ":" + str(second_node.name),
fill='black', font=("Purisa", 12))
def _draw_arc(self, node, transaction_name):
x1 = node.x
y1 = node.y
self.canvas.create_oval(x1 + 20, y1 - 25, x1 - 20, y1 - 50, tag=str(node.name) + ":" + str(node.name))
self.canvas.create_text(x1, y1 - 60, text="" + str(transaction_name),
tag="t" + str(node.name) + ":" + str(node.name), fill='black', font=("Purisa", 12))
def on_node_press(self, event):
"""Being drag of an object"""
# record the item and its location
if self.action == AutomatonAction.Add_State:
self._drag_data["item"] = self.canvas.find_closest(event.x, event.y)[0]
tag = self.canvas.gettags(self.canvas.find_closest(event.x, event.y)[0])[0]
if tag[0:4] == TAGC:
self._drag_data["item2"] = self.canvas.find_withtag(TAGT + str(tag[4:]))
elif tag[0:4] == TAGT:
self._drag_data["item2"] = self.canvas.find_withtag(TAGC + str(tag[4:]))
self._drag_data["x"] = event.x
self._drag_data["y"] = event.y
elif self.action == AutomatonAction.Add_Transition:
tag = self.canvas.gettags(self.canvas.find_closest(event.x, event.y)[0])[0]
self.transitionBind = TransitionBind(self.automaton.nodes[int(tag[4:])])
self.canvas.create_line(event.x, event.y, event.x, event.y, tag="templine")
print("press")
elif self.action == AutomatonAction.Set_Initial:
# reset all nodes to normal state
for node in self.automaton.nodes:
if node.state == NodeState.Initial:
node.state = NodeState.NoState
self.canvas.itemconfig(self.canvas.find_withtag(TAGC + str(node.name)), fill=COLOR_NORMAL)
tag = self.canvas.gettags(self.canvas.find_closest(event.x, event.y)[0])[0]
if tag[0:4] == TAGC:
self.automaton.set_node_state(tag[4:], NodeState.Initial)
self.canvas.itemconfig(self.canvas.find_closest(event.x, event.y)[0], fill=COLOR_INITIAL)
elif self.action == AutomatonAction.Set_Final:
tag = self.canvas.gettags(self.canvas.find_closest(event.x, event.y)[0])[0]
if tag[0:4] == TAGC:
self.automaton.set_node_state(tag[4:], NodeState.Final)
self.canvas.itemconfig(self.canvas.find_closest(event.x, event.y)[0], fill=COLOR_FINAL)
def on_node_release(self, event):
if self.action == AutomatonAction.Add_State:
tag = self.canvas.gettags(self._drag_data["item"])[0]
self.automaton.nodes[int(tag[4:])].x = event.x
self.automaton.nodes[int(tag[4:])].y = event.y
self._drag_data["item"] = None
self._drag_data["x"] = 0
self._drag_data["y"] = 0
elif self.action == AutomatonAction.Add_Transition:
self.canvas.delete("templine")
tag = self.canvas.gettags(self.canvas.find_closest(event.x, event.y)[0])[0]
if tag:
self.transitionBind.set_secondNode(self.automaton.nodes[int(tag[4:])])
first_node = self.transitionBind.firstnode
second_node = self.transitionBind.secondNode
dialog = InputDialog(self);
self.wait_window(dialog.top)
transaction_name = dialog.value
if transaction_name == "":
transaction_name = LAMBDA
first_node.add_transition(Transition(second_node, transaction_name))
if second_node.name != first_node.name:
self._draw_line(first_node, second_node, transaction_name, "black")
else:
self._draw_arc(first_node, transaction_name)
def on_node_move(self, event):
"""Handle dragging of an object"""
# compute how much this object has moved
if self.action == AutomatonAction.Add_State:
delta_x = event.x - self._drag_data["x"]
delta_y = event.y - self._drag_data["y"]
# move the object the appropriate amount
self.canvas.move(self._drag_data["item"], delta_x, delta_y)
self.canvas.move(self._drag_data["item2"], delta_x, delta_y)
tag = self.canvas.gettags(self._drag_data["item"])[0]
node = self.automaton.nodes[int(tag[4:])]
if node.transitions:
for i in node.transitions:
line = self.canvas.find_withtag(str(node.name) + ":" + str(i.node.name))
text = self.canvas.find_withtag("t" + str(node.name) + ":" + str(i.node.name))
if self.canvas.coords(line):
coordx = self.canvas.coords(line)[2]
coordy = self.canvas.coords(line)[3]
if node.name != i.node.name:
coef = 0
for transaction in i.node.transitions:
if transaction.node.name == node.name:
coef = 20
break
self.canvas.coords(line, (event.x, event.y + int(coef), coordx, i.node.y + int(coef)))
self.canvas.coords(text, (event.x + i.node.x) / 2,
(i.node.y + event.y) / 2 + int(coef))
else:
self.canvas.move(line, delta_x, delta_y)
self.canvas.move(text, delta_x, delta_y)
for nodeMove in self.automaton.nodes:
for transition in nodeMove.transitions:
if transition.node.name == node.name:
line = self.canvas.find_withtag(str(nodeMove.name) + ":" + str(node.name))
text = self.canvas.find_withtag("t" + str(nodeMove.name) + ":" + str(node.name))
if self.canvas.coords(line):
if nodeMove.name != node.name:
self.canvas.coords(line, (nodeMove.x, nodeMove.y, event.x, event.y))
self.canvas.coords(text,
((event.x + nodeMove.x) / 2, (event.y + nodeMove.y) / 2))
# record the new position
self._drag_data["x"] = event.x
self._drag_data["y"] = event.y
elif self.action == AutomatonAction.Add_Transition:
node = self.transitionBind.firstnode
line = self.canvas.find_withtag("templine")
self.canvas.coords(line, (node.x, node.y, event.x, event.y))