class App(tk.Frame):
def __init__(self, master):
#graph object and changed variable to keep track of save-state
self.graphObj = Graph()
self.flowObj = Flow()
self.changed = []
#get the application window, set title and basic attributes
tk.Frame.__init__(self, master, background="#1d1d1d")
self.pack()
self.master.title("gmath")
self.master.resizable(True, True)
self.master.tk_setPalette(background="#222222", foreground="#2ecc71")
#basic universal behaviors
#if window closed by window manager, exit safely
self.master.protocol("WM_DELETE_WINDOW", self.click_exit)
#set of keybindings
self.master.bind("<Control_L><Escape>", self.click_exit)
self.master.bind("<Control_L>1", self.dependent_active)
self.master.bind("<Control_L>2", self.dependency_active)
self.master.bind("<Control_L>a", self.add_button_active)
self.master.bind("<Control_L>t", self.top_sort_button_active)
self.master.bind("<Control_L>3", self.vertex_active)
self.master.bind("<Alt_L>1", self.arc_node_active)
self.master.bind("<Alt_L>2", self.arc_neighbor_active)
self.master.bind("<Alt_L>3", self.arc_capacity_active)
self.master.bind("<Alt_L>4", self.node_active)
self.master.bind("<Control_L>A", self.add_vertex_active)
self.master.bind("<Control_L>R", self.remove_vertex_active)
self.master.bind("<Control_L>r", self.remove_button_active)
self.master.bind("<Control_L>s", self.menu_save)
self.master.bind("<Control_L>o", self.menu_open)
self.master.bind("<Control_L>f", self.flow_tab_active)
self.master.bind("<Control_L>d", self.dep_tab_active)
#Menu bar
menubar = tk.Menu(self, background="#1d1d1d", foreground="#2ecc71")
#File menu in menu bar: open, save, exit
filemenu = tk.Menu(menubar,
tearoff=0,
background="#1d1d1d",
foreground="#2ecc71")
filemenu.add_command(label="Open", command=self.menu_open)
filemenu.add_command(label="Save", command=self.menu_save)
filemenu.add_separator()
filemenu.add_command(label="Exit Ctrl+Esc", command=self.click_exit)
menubar.add_cascade(label="File", menu=filemenu)
#slap the menubar altogether
self.master.config(menu=menubar)
#tab panes and ttk styling for notebook
self.style = Style()
self.style.theme_create("gmath",
parent="alt",
settings={
"TNotebook": {
"configure": {
"background": "#1d1d1d"
}
},
"TNotebook.Tab": {
"configure": {
"background": "#1d1d1d",
"foreground": "#2ecc71",
"padding": [4, 2]
},
"map": {
"background":
[("selected", "#222222")]
}
}
})
self.style.theme_use("gmath")
self.tabs = Notebook(self)
self.tabs.pack()
#dependency graph frame inside notebook
dep_graph_frame = tk.Frame(self.tabs)
dep_graph_frame.pack()
#manipulation frame in dependency graph frame
manipulation_frame = tk.Frame(dep_graph_frame, borderwidth=0)
manipulation_frame.pack(padx=0, pady=10)
#edge frame in manipulation frame
#contains dependent and dependency labels and entries and
#add and remove buttons for edges
edge_frame = tk.Frame(manipulation_frame, borderwidth=0)
edge_frame.pack(padx=15, pady=15, side="left")
dependent_frame = tk.Frame(edge_frame, borderwidth=0)
dependent_frame.pack()
dependency_frame = tk.Frame(edge_frame, borderwidth=0)
dependency_frame.pack()
tk.Label(dependent_frame, text="Dependent: ").pack(side="left")
tk.Label(dependency_frame, text="Dependency:").pack(side="left")
self.dependent_entry = tk.Entry(dependent_frame)
self.dependent_entry.pack(pady=5, side="left")
self.dependent_entry.focus_set()
self.dependency_entry = tk.Entry(dependency_frame)
self.dependency_entry.pack(pady=5, side="left")
self.add_button = tk.Button(edge_frame,
text="Add Edge",
command=self.add_edge)
self.add_button.bind("<Return>", self.add_edge)
self.add_button.pack(side="left")
self.remove_button = tk.Button(edge_frame,
text="Remove Edge",
command=self.remove_edge)
self.remove_button.bind("<Return>", self.remove_edge)
self.remove_button.pack(side="left")
self.remove_button['state'] = 'disabled'
#vertex frame in manipulation frame
#contains a label and entry for vertex and
#add and remove buttons for the vertex
vertex_frame = tk.Frame(manipulation_frame, borderwidth=0)
vertex_frame.pack(padx=15, pady=15, side="left")
vertex_entry_frame = tk.Frame(vertex_frame, borderwidth=0)
vertex_entry_frame.pack()
tk.Label(vertex_entry_frame, text="Vertex: ").pack(side="left")
self.vertex_entry = tk.Entry(vertex_entry_frame)
self.vertex_entry.pack(pady=5, side="left")
vertex_button_frame = tk.Frame(vertex_frame, borderwidth=0)
vertex_button_frame.pack()
self.add_vertex_button = tk.Button(vertex_button_frame,
text="Add Vertex",
command=self.add_vertex)
self.add_vertex_button.bind("<Return>", self.add_vertex)
self.add_vertex_button.pack(side="left")
self.remove_vertex_button = tk.Button(vertex_button_frame,
text="Remove Vertex",
command=self.remove_vertex)
self.remove_vertex_button.bind("<Return>", self.remove_vertex)
self.remove_vertex_button.pack(side="left")
self.remove_vertex_button['state'] = 'disabled'
#lists frame, contains listbox for edges and vertices
lists_frame = tk.Frame(dep_graph_frame, borderwidth=0)
lists_frame.pack(padx=15, pady=15)
#edge list scrollable listbox
edge_list_frame = tk.Frame(lists_frame, borderwidth=0)
edge_list_frame.pack(side="left", padx=15)
tk.Label(edge_list_frame, text="Edge List: ").pack(padx=5, pady=5)
edge_scrollbar = tk.Scrollbar(edge_list_frame, orient="vertical")
self.edge_list = tk.Listbox(edge_list_frame,
selectmode='multiple',
selectbackground="#2ecc71",
selectforeground="#222222",
yscrollcommand=edge_scrollbar.set,
height=10,
borderwidth=1)
edge_scrollbar.config(command=self.edge_list.yview)
edge_scrollbar.pack(side="right", fill="y")
self.edge_list.bind("<Delete>", self.remove_edge_list)
self.edge_list.pack(side="left", fill="y", expand=1)
#vertex list scrollable listbox
vertex_list_frame = tk.Frame(lists_frame, borderwidth=0)
vertex_list_frame.pack(side="right", padx=15)
tk.Label(vertex_list_frame, text="Vertex List: ").pack(padx=5, pady=5)
vertex_scrollbar = tk.Scrollbar(vertex_list_frame, orient="vertical")
self.vertex_list = tk.Listbox(vertex_list_frame,
selectmode='multiple',
selectbackground="#2ecc71",
selectforeground="#222222",
yscrollcommand=vertex_scrollbar.set,
height=10,
borderwidth=1)
vertex_scrollbar.config(command=self.vertex_list.yview)
vertex_scrollbar.pack(side="right", fill="y")
self.vertex_list.bind("<Delete>", self.remove_vertex_list)
self.vertex_list.pack(side="left", fill="y", expand=1)
#function frame in dependency graph frame
function_frame = tk.Frame(dep_graph_frame, borderwidth=0)
function_frame.pack(padx=15, pady=15)
#output frame in function frame
output_frame = tk.Frame(function_frame, borderwidth=0)
output_frame.pack()
#basic outputs such as vertex count, edge count, and if cycle was detected
basic_output_frame = tk.Frame(output_frame, borderwidth=0)
basic_output_frame.pack(padx=15, pady=15, side="left")
basic_output_vertices = tk.Frame(basic_output_frame, borderwidth=0)
basic_output_vertices.pack()
basic_output_edges = tk.Frame(basic_output_frame, borderwidth=0)
basic_output_edges.pack()
basic_output_cycle = tk.Frame(basic_output_frame, borderwidth=0)
basic_output_cycle.pack()
tk.Label(basic_output_vertices, text="Vertices: ").pack(padx=5,
pady=5,
side="left")
self.vertices_label = tk.Label(basic_output_vertices, text="")
self.vertices_label.pack(padx=10, pady=5, side="left")
tk.Label(basic_output_edges, text="Edges: ").pack(padx=5,
pady=5,
side="left")
self.edges_label = tk.Label(basic_output_edges, text="")
self.edges_label.pack(padx=10, pady=5, side="left")
tk.Label(basic_output_cycle, text="Cycle Detected: ").pack(padx=5,
pady=5,
side="left")
self.cycle_label = tk.Label(basic_output_cycle, text="")
self.cycle_label.pack(padx=10, pady=5, side="left")
#topological sort frame with scrollable listbox and button to call top sort function
output_top_sort_frame = tk.Frame(output_frame, borderwidth=0)
output_top_sort_frame.pack(padx=15, pady=15, side="right")
tk.Label(output_top_sort_frame, text="Topological Sort: ").pack(padx=5,
pady=0)
top_sort_list_frame = tk.Frame(output_top_sort_frame, borderwidth=0)
top_sort_list_frame.pack(pady=15)
top_sort_scrollbar = tk.Scrollbar(top_sort_list_frame,
orient="vertical")
self.top_sort_list = tk.Listbox(top_sort_list_frame,
yscrollcommand=top_sort_scrollbar.set,
height=10,
borderwidth=1)
top_sort_scrollbar.config(command=self.top_sort_list.yview)
top_sort_scrollbar.pack(side="right", fill="y")
self.top_sort_list.pack(side="left", fill="y", expand=1)
self.top_sort_button = tk.Button(output_top_sort_frame,
text="Topological Sort",
command=self.topological_sort)
self.top_sort_button.bind("<Return>", self.topological_sort)
self.top_sort_button.pack()
self.top_sort_button['state'] = 'disabled'
#add dependency graph frame tab to the notebook tab frame
self.tabs.add(dep_graph_frame, text="Dep Graph")
#network flow frame
flow_frame = tk.Frame(self.tabs)
flow_frame.pack()
#arc and node content containter
arc_and_node_frame = tk.Frame(flow_frame, borderwidth=0)
arc_and_node_frame.pack(padx=0, pady=10)
#arc frame content
arc_frame = tk.Frame(arc_and_node_frame, borderwidth=0)
arc_frame.pack(padx=15, pady=15, side="left")
arc_node_frame = tk.Frame(arc_frame, borderwidth=0)
arc_node_frame.pack()
arc_neighbor_frame = tk.Frame(arc_frame, borderwidth=0)
arc_neighbor_frame.pack()
arc_capacity_frame = tk.Frame(arc_frame, borderwidth=0)
arc_capacity_frame.pack()
tk.Label(arc_node_frame, text="Node: ").pack(side="left")
tk.Label(arc_neighbor_frame, text="Neighbor:").pack(side="left")
tk.Label(arc_capacity_frame, text="Capacity:").pack(side="left")
self.arc_node_entry = tk.Entry(arc_node_frame)
self.arc_node_entry.pack(pady=5, side="left")
self.arc_node_entry.focus_set()
self.arc_neighbor_entry = tk.Entry(arc_neighbor_frame)
self.arc_neighbor_entry.pack(pady=5, side="left")
self.arc_capacity_entry = tk.Entry(arc_capacity_frame)
self.arc_capacity_entry.pack(pady=5, side="left")
self.add_arc_button = tk.Button(arc_frame,
text="Add Edge",
command=self.add_arc)
self.add_arc_button.bind("<Return>", self.add_arc)
self.add_arc_button.pack(side="left")
self.remove_arc_button = tk.Button(arc_frame,
text="Remove Edge",
command=self.remove_arc)
self.remove_arc_button.bind("<Return>", self.remove_arc)
self.remove_arc_button.pack(side="left")
self.remove_arc_button['state'] = 'disabled'
#node frame content
node_frame = tk.Frame(arc_and_node_frame, borderwidth=0)
node_frame.pack(padx=15, pady=15, side="left")
node_entry_frame = tk.Frame(node_frame, borderwidth=0)
node_entry_frame.pack()
tk.Label(node_entry_frame, text="Node: ").pack(side="left")
self.node_entry = tk.Entry(node_entry_frame)
self.node_entry.pack(pady=5, side="left")
node_button_frame = tk.Frame(node_frame, borderwidth=0)
node_button_frame.pack()
self.add_node_button = tk.Button(node_button_frame,
text="Add Node",
command=self.add_node)
self.add_node_button.bind("<Return>", self.add_node)
self.add_node_button.pack(side="left")
self.remove_node_button = tk.Button(node_button_frame,
text="Remove Node",
command=self.remove_node)
self.remove_node_button.bind("<Return>", self.remove_node)
self.remove_node_button.pack(side="left")
self.remove_node_button['state'] = 'disabled'
#lists frame, contains listbox for nodes and arcs
flow_lists_frame = tk.Frame(flow_frame, borderwidth=0)
flow_lists_frame.pack(padx=15, pady=15)
#arc list scrollable listbox
arc_list_frame = tk.Frame(flow_lists_frame, borderwidth=0)
arc_list_frame.pack(side="left", padx=15)
tk.Label(arc_list_frame, text="Arc List: ").pack(padx=5, pady=5)
arc_scrollbar = tk.Scrollbar(arc_list_frame, orient="vertical")
self.arc_list = tk.Listbox(arc_list_frame,
selectmode='multiple',
selectbackground="#2ecc71",
selectforeground="#222222",
yscrollcommand=edge_scrollbar.set,
height=10,
borderwidth=1)
arc_scrollbar.config(command=self.arc_list.yview)
arc_scrollbar.pack(side="right", fill="y")
self.arc_list.bind("<Delete>", self.remove_arc_list)
self.arc_list.pack(side="left", fill="y", expand=1)
#node list scrollable listbox
node_list_frame = tk.Frame(flow_lists_frame, borderwidth=0)
node_list_frame.pack(side="right", padx=15)
tk.Label(node_list_frame, text="Node List: ").pack(padx=5, pady=5)
node_scrollbar = tk.Scrollbar(node_list_frame, orient="vertical")
self.node_list = tk.Listbox(node_list_frame,
selectmode='multiple',
selectbackground="#2ecc71",
selectforeground="#222222",
yscrollcommand=vertex_scrollbar.set,
height=10,
borderwidth=1)
node_scrollbar.config(command=self.node_list.yview)
node_scrollbar.pack(side="right", fill="y")
self.node_list.bind("<Delete>", self.remove_node_list)
self.node_list.pack(side="left", fill="y", expand=1)
#flow output frame
flow_output_frame = tk.Frame(flow_frame, borderwidth=0)
flow_output_frame.pack(padx=15, pady=15)
flow_output_nodes = tk.Frame(flow_output_frame, borderwidth=0)
flow_output_nodes.pack()
flow_output_arcs = tk.Frame(flow_output_frame, borderwidth=0)
flow_output_arcs.pack()
flow_output_max = tk.Frame(flow_output_frame, borderwidth=0)
flow_output_max.pack()
tk.Label(flow_output_nodes, text="Nodes: ").pack(padx=5,
pady=5,
side="left")
self.nodes_label = tk.Label(flow_output_nodes, text="")
self.nodes_label.pack(padx=10, pady=5, side="left")
tk.Label(flow_output_arcs, text="Arcs: ").pack(padx=5,
pady=5,
side="left")
self.arcs_label = tk.Label(flow_output_arcs, text="")
self.arcs_label.pack(padx=10, pady=5, side="left")
tk.Label(flow_output_max, text="Maximum Flow: ").pack(padx=5,
pady=5,
side="left")
self.max_label = tk.Label(flow_output_max, text="")
self.max_label.pack(padx=10, pady=5, side="left")
self.tabs.add(flow_frame, text="Flow Graph")
#update the geometry of the master frame
self.master.geometry()
self.master.update()
#setup to put screen centered horizontally and starting at top third vertically
x = int(
(self.master.winfo_screenwidth() - self.master.winfo_width()) / 2)
y = int(
(self.master.winfo_screenheight() - self.master.winfo_height()) /
3)
self.master.geometry("{}x{}+{}+{}".format(self.master.winfo_width(),
self.master.winfo_height(),
x, y))
def add_edge(self, event=None):
''' simple add edge to graph '''
dependency_text = self.dependency_entry.get()
dependent_text = self.dependent_entry.get()
if dependency_text != "" and dependent_text != "" and dependency_text != dependent_text:
if self.graphObj.add_edge(dependent_text, dependency_text):
if 'dpg' not in self.changed:
self.changed.append('dpg')
self.dependency_entry.delete(0, 'end')
self.dependent_entry.delete(0, 'end')
self.graphObj.is_cyclic()
self.edge_list.insert(
tk.END,
str(dependent_text) + " -> " + str(dependency_text))
self.update_output_labels()
self.change_button_state()
self.update_dep_lists()
def add_arc(self, event=None):
''' add an arc to the flow '''
arc_node_text = self.arc_node_entry.get()
arc_neighbor_text = self.arc_neighbor_entry.get()
arc_capacity_text = self.arc_capacity_entry.get()
if arc_node_text != '' and arc_neighbor_text != '' and arc_capacity_text.isnumeric(
) and float(
arc_capacity_text) >= 0 and arc_node_text != arc_neighbor_text:
self.flowObj.add_arc(arc_node_text, arc_neighbor_text,
float(arc_capacity_text))
self.update_flow_labels()
self.node_list.delete(0, 'end')
for e in self.flowObj.nodes():
self.node_list.insert(tk.END, str(e))
self.arc_list.insert(
tk.END,
str(arc_node_text) + " -(" + str(arc_capacity_text) + ")-> " +
str(arc_neighbor_text))
self.arc_node_entry.delete(0, 'end')
self.arc_neighbor_entry.delete(0, 'end')
self.arc_capacity_entry.delete(0, 'end')
if 'flw' not in self.changed:
self.changed.append('flw')
self.change_button_state()
def remove_edge(self, event=None):
''' simple remove edge from graph '''
dependency_text = self.dependency_entry.get()
dependent_text = self.dependent_entry.get()
if dependency_text != "" and dependent_text != "":
if self.graphObj.remove_edge(dependent_text, dependency_text):
self.graphObj.is_cyclic()
if 'dpg' not in self.changed:
self.changed.append('dpg')
self.dependency_entry.delete(0, 'end')
self.dependent_entry.delete(0, 'end')
self.update_output_labels()
self.change_button_state()
self.update_dep_lists()
def remove_edge_list(self, event=None):
''' remove selected edges from edge list listbox '''
selections = [
self.edge_list.get(x).split("->")
for x in self.edge_list.curselection()
]
#edge_sel = [x.strip() for x in "".split("->")]
values = []
for y in selections:
values.append([y[0].strip(), y[1].strip()])
for e in values:
if self.graphObj.remove_edge(e[0], e[1]):
if 'dpg' not in self.changed:
self.changed.append('dpg')
self.graphObj.is_cyclic()
self.update_output_labels()
self.change_button_state()
self.graphObj.is_cyclic()
self.update_output_labels()
self.change_button_state()
self.update_dep_lists()
def remove_arc(self, event=None):
''' '''
arc_node_text = self.arc_node_entry.get()
arc_neighbor_text = self.arc_neighbor_entry.get()
if arc_node_text != '' and arc_neighbor_text != '':
if self.flowObj.remove_arc(arc_node_text, arc_neighbor_text):
self.update_flow_labels()
if 'flw' not in self.changed:
self.changed.append('flw')
self.arc_list.delete(0, 'end')
for e in self.flowObj.arcs():
self.arc_list.insert(
tk.END,
str(e[0]) + " -(" + str(e[2]) + ")-> " + str(e[1]))
self.arc_node_entry.delete(0, 'end')
self.arc_neighbor_entry.delete(0, 'end')
self.arc_capacity_entry.delete(0, 'end')
self.change_button_state()
def remove_arc_list(self, event=None):
''' '''
selections = [
self.arc_list.get(x).split("-")
for x in self.arc_list.curselection()
]
values = []
for y in selections:
values.append([y[0].strip(), y[2][1:].strip()])
for e in values:
if self.flowObj.remove_arc(e[0], e[1]):
if 'flw' not in self.changed:
self.changed.append('flw')
self.update_flow_labels()
self.change_button_state()
self.update_flow_lists()
def add_vertex(self, event=None):
''' simple add vertex to graph '''
vertex_text = self.vertex_entry.get()
if vertex_text != "":
if self.graphObj.add_vertex(vertex_text):
self.vertex_list.insert(tk.END, str(vertex_text))
if 'dpg' not in self.changed:
self.changed.append('dpg')
self.vertex_entry.delete(0, 'end')
self.update_output_labels()
self.change_button_state()
def add_node(self, event=None):
''' '''
node_text = self.node_entry.get()
if node_text != '':
if self.flowObj.add_node(node_text):
if 'flw' not in self.changed:
self.changed.append('flw')
self.node_entry.delete(0, 'end')
self.change_button_state()
self.update_flow_labels()
self.node_list.insert(tk.END, str(node_text))
def remove_vertex(self, event=None):
''' simple remove vertex from graph '''
vertex_text = self.vertex_entry.get()
if vertex_text != "":
if self.graphObj.remove_vertex(vertex_text):
if 'dpg' not in self.changed:
self.changed.append('dpg')
self.vertex_entry.delete(0, 'end')
self.graphObj.is_cyclic()
self.update_output_labels()
self.change_button_state()
self.update_dep_lists()
def remove_vertex_list(self, event=None):
''' removes all selected vertices from vertex listbox '''
values = [
self.vertex_list.get(x).strip()
for x in self.vertex_list.curselection()
]
for v in values:
if self.graphObj.remove_vertex(v):
if 'dpg' not in self.changed:
self.changed.append('dpg')
self.graphObj.is_cyclic()
self.update_output_labels()
self.change_button_state()
self.graphObj.is_cyclic()
self.update_output_labels()
self.change_button_state()
self.update_dep_lists()
def remove_node(self, event=None):
''' '''
node_text = self.node_entry.get()
if node_text != '':
if self.flowObj.remove_node(node_text):
self.update_flow_labels()
if 'flw' not in self.changed:
self.changed.append('flw')
self.node_entry.delete(0, 'end')
self.change_button_state()
self.update_flow_lists()
def remove_node_list(self, event=None):
''' '''
values = [
self.node_list.get(x).strip()
for x in self.node_list.curselection()
]
for v in values:
if self.flowObj.remove_node(v):
if 'flw' not in self.changed:
self.changed.append('flw')
self.update_flow_labels()
self.change_button_state()
self.update_flow_lists()
def topological_sort(self):
''' outputs the topological sort in scrollable listbox in order '''
if not self.graphObj.cycle_detected():
self.top_sort_list.delete(0, 'end')
for v in self.graphObj.topological_sort():
self.top_sort_list.insert(tk.END, str(v))
def click_exit(self, event=None):
''' exit program safely by asking if they want to save changes '''
if len(self.changed) == 0:
self.master.destroy()
else:
if 'dpg' in self.changed:
graph_result = True
while graph_result and 'dpg' in self.changed:
graph_result = askokcancel(
"Python",
"Would you like to save your changes to the dependency graph?"
)
if graph_result:
self.menu_save()
if 'flw' in self.changed:
graph_result = True
while graph_result and 'flw' in self.changed:
graph_result = askokcancel(
"Python",
"Would you like to save your changes to the flow network?"
)
if graph_result:
self.menu_save()
self.master.destroy()
def menu_save(self, event=None):
''' opens a "save as" dialog to save the graph '''
filename = asksaveasfilename(initialdir=".",
title="Select file",
filetypes=(("Dependency Graph", "*.dpg"),
("Flow Network", "*.flw")))
try:
with open(filename, 'wb') as output:
if filename[-3:] == 'dpg':
pickle.dump(self.graphObj, output, pickle.HIGHEST_PROTOCOL)
self.changed.remove('dpg')
elif filename[-3:] == 'flw':
pickle.dump(self.flowObj, output, pickle.HIGHEST_PROTOCOL)
self.changed.remove('flw')
else:
raise
except:
print("Something went terribly wrong")
def menu_open(self, event=None):
''' opens an "open file" dialog to open a graph file '''
filename = askopenfilename(initialdir=".",
title="Select file",
filetypes=(("Dependency Graph", "*.dpg"),
("Flow Network", "*.flw")))
try:
if filename[-3:] == 'dpg' and 'dpg' in self.changed:
result = askokcancel(
"Python",
"Would you like to save your changes to the dependency graph?"
)
while result == True:
self.menu_save()
if 'dpg' in self.changed:
result = askokcancel(
"Python",
"Would you like to save your changes to the dependency graph?"
)
else:
result = False
elif filename[-3:] == 'flw' and 'flw' in self.changed:
result = askokcancel(
"Python",
"Would you like to save your changes to the flow network?")
while result == True:
self.menu_save()
if 'flw' in self.changed:
result = askokcancel(
"Python",
"Would you like to save your changes to the flow network?"
)
else:
result = False
with open(filename, 'rb') as inputf:
if filename[-3:] == 'dpg':
self.graphObj = pickle.load(inputf)
self.update_output_labels()
self.change_button_state()
self.update_dep_lists()
if 'dpg' in self.changed:
self.changed.remove('dpg')
elif filename[-3:] == 'flw':
self.flowObj = pickle.load(inputf)
self.update_flow_labels()
self.change_button_state()
self.update_flow_lists()
if 'flw' in self.changed:
self.changed.remove('flw')
except:
print("Something went terribly wrong")
def update_dep_lists(self):
''' '''
self.vertex_list.delete(0, 'end')
for e in self.graphObj.vertices():
self.vertex_list.insert(tk.END, str(e))
self.edge_list.delete(0, 'end')
for e in self.graphObj.edges():
self.edge_list.insert(tk.END, str(e[0]) + " -> " + str(e[1]))
self.topological_sort()
def update_flow_lists(self):
''' '''
self.node_list.delete(0, 'end')
for e in self.flowObj.nodes():
self.node_list.insert(tk.END, str(e))
self.arc_list.delete(0, 'end')
for e in self.flowObj.arcs():
self.arc_list.insert(
tk.END,
str(e[0]) + " -(" + str(e[2]) + ")-> " + str(e[1]))
def update_output_labels(self):
''' update the vertex and edge count labels and the cycle detected label '''
self.vertices_label['text'] = str(self.graphObj.order())
self.edges_label['text'] = str(self.graphObj.size())
self.cycle_label['text'] = str(self.graphObj.cycle_detected())
def update_flow_labels(self):
''' update arc and node count labels and max flow label '''
self.nodes_label['text'] = str(self.flowObj.order())
self.arcs_label['text'] = str(self.flowObj.size())
mf = self.flowObj.max_flow()
if mf != False:
self.max_label['text'] = str(mf)
else:
self.max_label['text'] = 'Insufficient conditions'
def change_button_state(self):
''' enable and disable buttons according to their ability to be used
based on the current state of the graph
'''
if self.graphObj.order() > 0:
self.top_sort_button['state'] = 'normal'
self.remove_vertex_button['state'] = 'normal'
else:
self.top_sort_button['state'] = 'disabled'
self.remove_vertex_button['state'] = 'disabled'
if self.graphObj.size() > 0:
self.remove_button['state'] = 'normal'
else:
self.remove_button['state'] = 'disabled'
if self.flowObj.order() > 0:
self.remove_node_button['state'] = 'normal'
else:
self.remove_node_button['state'] = 'disabled'
if self.flowObj.size() > 0:
self.remove_arc_button['state'] = 'normal'
else:
self.remove_arc_button['state'] = 'disabled'
def dependency_active(self, event=None):
''' set dependency text entry field active '''
self.dependency_entry.focus_set()
def dependent_active(self, event=None):
''' set dependent text entry field active '''
self.dependent_entry.focus_set()
def arc_node_active(self, event=None):
''' set arc node text entry field active '''
self.arc_node_entry.focus_set()
def arc_neighbor_active(self, event=None):
''' set arc neighbor text entry field active '''
self.arc_neighbor_entry.focus_set()
def arc_capacity_active(self, event=None):
''' set arc capacity text entry field active '''
self.arc_capacity_entry.focus_set()
def add_button_active(self, event=None):
''' set add edge button active and add edge '''
self.add_button.focus_set()
self.add_edge()
def remove_button_active(self, event=None):
''' set remove edge button active and remove edge '''
self.remove_button.focus_set()
self.remove_edge()
def add_vertex_active(self, event=None):
''' set add vertex button active and add vertex '''
self.add_vertex_button.focus_set()
self.add_vertex()
def remove_vertex_active(self, event=None):
''' set the remove vertex button active and call remove vertex '''
self.remove_vertex_button.focus_set()
self.remove_vertex()
def vertex_active(self, event=None):
''' set the vertex entry field active '''
self.vertex_entry.focus_set()
def node_active(self, event=None):
''' set the node entry field active '''
self.node_entry.focus_set()
def top_sort_button_active(self, event=None):
''' set the topological sort button active and call topological sort '''
self.top_sort_button.focus_set()
self.topological_sort()
def dep_tab_active(self, event=None):
''' show the dependency graph tab '''
self.tabs.select(0)
def flow_tab_active(self, event=None):
''' show the flow network tab '''
self.tabs.select(1)
