def __init__(self):
self.root = Tk()
self.setUpMenu()
self.canvas = self.setUpCanvas(self.root, 800, 800)
self.canvas.pack()
self.graph = DrawableGraph ()
self.eventHandler = EventHandler(self.canvas)
self.root.mainloop()
def findMin(nodeList):
minimum = nodeList[0].getWeight()
minNode = nodeList[0]
for node in nodeList:
if (node.getWeight() < minimum):
minNode = node
return minNode
def findNode(nodeList, vertex):
for node in nodeList:
if (node.getVertex() == vertex):
return node
g = DrawableGraph()
#a = g.addDrawableVertex((240, 75), 1)
#b = g.addDrawableVertex((175, 150), 2)
#c = g.addDrawableVertex((305, 150), 3)
#d = g.addDrawableVertex((145, 225), 4)
#e = g.addDrawableVertex((205, 225), 5)
#f = g.addDrawableVertex((275, 225), 6)
#h = g.addDrawableVertex((335, 225), 7)
#g.addEdge(a, b, 4)
#g.addEdge(a, c, 1)
#g.addEdge(c, b, 2)
#g.addEdge(b, e)
#g.addEdge(c, f)
#g.addEdge(c, h)
#g.addEdge(a, h)
def newGraph(self):
self.canvas.delete("all")
self.graph = DrawableGraph()
self.canvas.unbind("<Button-1>")
class App:
def __init__(self):
self.root = Tk()
self.setUpMenu()
self.canvas = self.setUpCanvas(self.root, 800, 800)
self.canvas.pack()
self.graph = DrawableGraph ()
self.eventHandler = EventHandler(self.canvas)
self.root.mainloop()
def setUpMenu(self):
menubar = Menu(self.root)
menubar.add_command(label="New Graph", command=self.newGraph)
menubar.add_command(label="Properties", command=self.properties)
menubar.add_command(label="Reset Graph", command = self.resetGraph)
algMenu = Menu(menubar, tearoff=0)
algMenu.add_command(label="Depth First Search", command=self.dfs)
algMenu.add_command(label="Breadth First Search", command=self.bfs)
algMenu.add_command(label="Prim's Algorithm", command=self.prims)
algMenu.add_command(label="Dijkstra's Algorithm", command=self.dijkstras)
menubar.add_cascade(label="Algorithms", menu=algMenu)
addMenu = Menu(menubar, tearoff=0)
addMenu.add_command(label="Vertices", command=self.addVertices)
addMenu.add_command(label="Edges", command=self.addEdges)
menubar.add_cascade(label="Add", menu=addMenu)
self.root.config(menu=menubar)
# Bind mouse click event to add a new vertex
def addVertices(self):
messagebox.showinfo("Add Vertex", "Click anywhere to add a vertex")
self.canvas.bind("<Button-1>", self.newVertex)
# Bind mouse click event to add a new edge
def addEdges(self):
messagebox.showinfo("Add Edge", "Select a start vertex and an end vertex")
self.canvas.bind("<Button-1>", self.newEdge)
# Wipe canvas, set graph attribute to a new graph
def newGraph(self):
self.canvas.delete("all")
self.graph = DrawableGraph()
self.canvas.unbind("<Button-1>")
# Colour all edges and vertices black
def resetGraph(self):
for v in self.graph:
v.setColour("black")
self.graph.drawGraph(self.canvas)
# Tell eventHandler to add a new edge
def newEdge(self, event):
self.eventHandler.newEdge(event, self.graph)
# Get properties back from eventHandler and display
def properties(self):
properties = self.eventHandler.handleProperties(self.graph)
# Graph has no edges or vertices, so do not show anything
if (properties != None):
PropertiesDialog(self.root, properties)
# Bind mouse click event to DFS
def dfs(self):
messagebox.showinfo("DFS", "Click on a start vertex")
self.canvas.bind("<Button-1>", self.handleDFS)
def handleDFS(self, event):
self.eventHandler.handleDFS(self.graph, event)
# Bind mouse click event to BFS
def bfs(self):
messagebox.showinfo("BFS", "Click on a start vertex")
self.canvas.bind("<Button-1>", self.handleBFS)
def handleBFS(self, event):
self.eventHandler.handleBFS(self.graph, event)
# Bind mouse click event to Prims
def prims(self):
messagebox.showinfo("Prims", "Click on a start vertex")
self.canvas.bind("<Button-1>", self.handlePrims)
def handlePrims(self, event):
self.eventHandler.handlePrims(self.graph, event)
# Bind mouse click event to Dijkstras
def dijkstras(self):
messagebox.showinfo("Dijkstras", "Click on a start vertex")
self.canvas.bind("<Button-1>", self.handleDijkstra)
def handleDijkstra(self, event):
self.eventHandler.handleDijkstra(self.graph, event)
def draw(self):
self.graph.drawGraph(self.canvas)
def setUpCanvas(self, master, width, height):
canvas = Canvas(master, width=width, height=height)
return canvas
def newVertex(self, event):
self.eventHandler.newVertex(event, self.graph)
