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我目前正在開發一個網絡項目，並且我想讓它可以創建多個節點並在它們之間添加連接。我已經完成了這一切，但現在我被困在嘗試使對象在移動對象時與對象一起移動。我爲每個創建的對象創建了字典，這些字典都存儲在列表中。 dicitonary存儲項目，項目所具有的連接器的數量，然後存儲與之關聯的連接器。使用對象Tkinter移動行
我該如何做到這一點，當我移動它們時，線條隨着物體一起移動？
這裏是我的庫代碼：
#-------------------------------------------------------------------------------
# Name: module1
# Purpose:
#
# Author: ahilton
#
# Created: 18/12/2014
# Copyright: (c) ahilton 2014
# Licence: <your licence>
#-------------------------------------------------------------------------------
#used for validation
#will make sure that the program will run on different versions of python
try:
# Python2
from Tkinter import *
except ImportError:
# Python3
from tkinter import *
#imports pre-defined libraries that are installed in tkinter
import random
#______________________________________________________________________________________________________________________________________________________________________
#creates a variable used for a count
count = 1
IPvar = 256
f = 0
ConnectCount = 1
a = 0
temp = 0
temp2 = 0
itemsconnectors = []
itemlist = []
LinkedItems = []
#______________________________________________________________________________________________________________________________________________________________________
class Window:
#______________________________________________________________________________________________________________________________________________________________________
def __init__(self, window, colour = 'White', width = 1440, height = 720):
#window variables
self.colour = colour
self.screenwidth = width
self.screenheight = height
#create the panes
self.MainCanvas = Canvas(window, background = self.colour, width = self.screenwidth, height = self.screenheight)
self.MainCanvas.pack()
#This dictionary is used to keep track of an item being dragged
self._drag_data = {"x": 0, "y": 0, "item": None}
#This dictionary is used to keep track of an item having it's state changed
self._state_change = {"item": None, "tag": "PCchange1", "colour": "Black"}
#This dictionary is used to keep track of the items being connected
self._connector = {"connector": None, "item": None, "item2": None, "x": 0, "y": 0, "x2": 0, "y2": 0, "tag": "False"}
self._object_data = []
#Add bindings for clicking, dragging and releasing over any object with the "PCdrag" tag
self.MainCanvas.tag_bind("PCdrag", "<ButtonPress-1>", self.OnButtonPress)
self.MainCanvas.tag_bind("PCdrag", "<ButtonRelease-1>", self.OnButtonRelease)
self.MainCanvas.tag_bind("PCdrag", "<B1-Motion>", self.OnMotion)
self.MainCanvas.tag_bind("ColourSwitch", "<ButtonPress-3>", self.ColourChange)
#self.MainCanvas.tag_bind("ColourSwitch", "<ButtonRelease-3>", self.ColourChangeRelease)
#self.MainCanvas.tag_bind("PCchange", "<B3-Motion>", self.ColourChange)
self.MainCanvas.tag_bind("text", "<Return>", self.OnEnter)
#______________________________________________________________________________________________________________________________________________________________________
def OnEnter(self, event):
print 'hi'
#______________________________________________________________________________________________________________________________________________________________________
def ChangeClick(self):
#This will change the binding of the mouse while the connector process is active
self.MainCanvas.tag_bind("PCdrag", "<ButtonPress-1>", self.LocateObject)
self.MainCanvas.tag_bind("PCdrag", "<ButtonRelease-1>", self.LocateObject2)
self.MainCanvas.tag_bind("PCdrag", "<B1-Motion>", self.Ignore)
#this is a temporary function to get rid of the OnMotion function which is usually called when the item is dragged
def Ignore(self, event):
a = 1
#print "Ignore"
#______________________________________________________________________________________________________________________________________________________________________
#This is used to draw the computer on the canvas, notice the tag that has been added as an attribute
def CreateComputer(self, x_start, y_start, color, tag):
#count = count + 1
#self._state_change["count"] = self._state_change["count"] + 1
#Creates a list of tags that are going to be added on to each computer object
#The second tag is defined elsewhere in the program as it changes depending on the state of the computer
#tag = ["PCdrag", self._state_change["count"], self._state_change["tag"], "ColourSwitch", self._connector["tag"]]
if temp <= temp2:
self._object_data.append(dict(item=count, CoCount=0))
#creates the object and takes properties from the DragItem class
self.MainCanvas.create_rectangle(x_start-40, y_start-25, x_start+40, y_start+25, outline=color, fill=color, tags = ("PCdrag", self._state_change["tag"], "ColourSwitch", self._connector["tag"], tag))
itemlist.append(self._state_change)
#print itemlist
#______________________________________________________________________________________________________________________________________________________________________
#This is used to draw text on top of the object on the canvas
def CreateText(self, x_start, y_start, Node, tag):
global count
global f
global IPvar
global temp
global temp2
IP = "192.168.0."
if f == 0:
temp2 = Node - 1
#IPvar = (IPvar - Node) + 1
#temp = IPvar
temp = 1
f = 1
else:
f = 1
if temp <= temp2:
self.MainCanvas.create_text(x_start, y_start, text = (IP, temp), fill = 'white', tag = ('PCdrag','text', tag))
count = count + 1
temp = temp + 1
else:
print 'fail'
#______________________________________________________________________________________________________________________________________________________________________
#this function will be called before the line is created. it sets all the variables for the line
def CreateLine(self):
global ConnectCount
#sets the four variables that will determine the coords of the line
xstart = self._connector["x"]
ystart = self._connector["y"]
xend = self._connector["x2"]
yend = self._connector["y2"]
#this will reset the _connector dictionary
self._connector["x"] = 0
self._connector["y"] = 0
self._connector["x2"] = 0
self._connector["y2"] = 0
#this will set the tag bindings back to their original ones to allow you to drag the item again
self.MainCanvas.tag_bind("PCdrag", "<ButtonPress-1>", self.OnButtonPress)
self.MainCanvas.tag_bind("PCdrag", "<ButtonRelease-1>", self.OnButtonRelease)
self.MainCanvas.tag_bind("PCdrag", "<B1-Motion>", self.OnMotion)
#print self._object_data
#tag = ["Linedrag", self._connector("item"), self._connector("item2")]
#this will create the line and put it on the main canvas
self.MainCanvas.create_line(xstart, ystart, xend , yend, tags = ("Linedrag", ConnectCount), width = 5, smooth = 1)
self.MainCanvas.tag_raise("PCdrag")
ConnectCount = ConnectCount + 1
#______________________________________________________________________________________________________________________________________________________________________
def LocateObject(self, event):
global ConnectCount
#sets the key "item" in the _connector dictionary to be equal to the object closest to the mouse
#sets the key "x" and the key "y" to be equal to the x and y coords of the object
self._connector["item"] = self.MainCanvas.find_closest(event.x, event.y)[0]
if self._connector["item"] % 2 == 0:
temp = self._connector["item"]/2
for d in range(len(self._object_data)):
if self._object_data[d]["item"] == temp:
self._object_data[d]["CoCount"] = self._object_data[d]["CoCount"] + 1
self._object_data[d]["Connect" + str(self._object_data[d]["CoCount"])] = ConnectCount
self._connector["item"] = self._connector["item"] - 1
else:
self._connector["item"] = self._connector["item"] + 1
temp = self._connector["item"]/2
for d in range(len(self._object_data)):
if self._object_data[d]["item"] == temp:
self._object_data[d]["CoCount"] = self._object_data[d]["CoCount"] + 1
self._object_data[d]["Connect" + str(self._object_data[d]["CoCount"])] = ConnectCount
self._connector["item"] = self._connector["item"] - 1
#print self._object_data, 'test1'
self._connector["x"] = self.MainCanvas.coords(self._connector["item"])[0] + 40
self._connector["y"] = self.MainCanvas.coords(self._connector["item"])[1] + 25
#______________________________________________________________________________________________________________________________________________________________________
def LocateObject2(self, event):
global ConnectCount
#sets the key "item" in the _connector dictionary to be equal to the object closest to the mouse
#sets the key "x2" and the key "y2" to be equal to the x and y coords of the object
#self._connector["connector"] = self.MainCanvas.find_closest(event.x, event.y)
self._connector["item2"] = self.MainCanvas.find_closest(event.x, event.y)[0]
if self._connector["item2"] % 2 == 0:
temp = self._connector["item2"]/2
for d in range(len(self._object_data)):
if self._object_data[d]["item"] == temp:
self._object_data[d]["CoCount"] = self._object_data[d]["CoCount"] + 1
self._object_data[d]["Connect" + str(self._object_data[d]["CoCount"])] = ConnectCount
self._connector["item2"] = self._connector["item2"] - 1
else:
self._connector["item2"] = self._connector["item2"] + 1
temp = self._connector["item2"]/2
for d in range(len(self._object_data)):
if self._object_data[d]["item"] == temp:
self._object_data[d]["CoCount"] = self._object_data[d]["CoCount"] + 1
self._object_data[d]["Connect" + str(self._object_data[d]["CoCount"])] = ConnectCount
self._connector["item2"] = self._connector["item2"] - 1
#print self._object_data, 'test2'
self._connector["x2"] = self.MainCanvas.coords(self._connector["item2"])[2] - 40
self._connector["y2"] = self.MainCanvas.coords(self._connector["item2"])[3] - 25
#an if statement to check whether the items are the same or if there is no item selected
if self._connector["item"] != self._connector["item2"]:
self._connector["tag"] = "True"
#sets the tags of the objects again to compensate for the tag change in the if statements previously
#tag = ["PCdrag", self._state_change["count"], self._state_change["tag"], "ColourSwitch", self._connector["tag"]]
#tag = ["PCdrag", self._state_change["tag"], "ColourSwitch", self._connector["tag"]]
#configures the items to change the tags of the items accordingly
#self.MainCanvas.itemconfig(self._connector["item"], tags = tag)
#self.MainCanvas.itemconfig(self._connector["item2"], tags = tag)
self.CreateLine()
self._connector["item"] = None
self._connector["connector"] = None
self._connector["item2"] = None
self._connector["x"] = 0
self._connector["y"] = 0
self._connector["x2"] = 0
self._connector["y2"] = 0
elif self._connector["item"] and self._connector["item2"] == 0:
self.Fail()
else:
self.Fail()
#______________________________________________________________________________________________________________________________________________________________________
#function that is called if the connector cannot be made
def Fail(self):
print 'Fail'
self._connector = {"connector": None, "item": None, "item2": None, "x": 0, "y": 0, "x2": 0, "y2": 0, "tag": "False"}
#this will set the tag bindings back to their original ones to allow you to drag the item again
self.MainCanvas.tag_bind("PCdrag", "<ButtonPress-1>", self.OnButtonPress)
self.MainCanvas.tag_bind("PCdrag", "<ButtonRelease-1>", self.OnButtonRelease)
self.MainCanvas.tag_bind("PCdrag", "<B1-Motion>", self.OnMotion)
#______________________________________________________________________________________________________________________________________________________________________
#This uses the find_closest method to get store the x and y positions of the nearest item into the dictionary
def OnButtonPress(self, event):
global itemsconnectors
global a
def Search(a):
for d in range(len(self._object_data)):
print 'hi1'
print self._object_data
if a in self._object_data[d]:
print 'hi'
## def Search():
## for d in range(len(a)):
## if 15 in a[d]["CoCount"]:
## print 'hi'
## else:
## print 'fail'
p = 0
item = self.MainCanvas.find_closest(event.x, event.y)[0]
tags = self.MainCanvas.gettags(item)
for tag in tags:
if tag.startswith("circle-"):
break
self._drag_data["item"] = tag
'''Begin drag of an object'''
# record the item and its location
#self._drag_data["item"] = self.MainCanvas.find_closest(event.x, event.y)[0]
self._drag_data["x"] = event.x
self._drag_data["y"] = event.y
if item % 2 == 0:
item = item/2
#runs for loop for the amount of nodes on screen
for d in range(len(self._object_data)):
#checks to find the current items dictionary
if self._object_data[d]["item"] == item:
#checks if the item has a connector
if self._object_data[d]["CoCount"] > 0:
#sets the amount of connectors the object has
connectors = len(self._object_data[d]) - 2
#runs a loop for the amount of connectors it has
for i in range(connectors):
#sets a to be equal to the current connector in the loop
a = self._object_data[d]["Connect" + str(i + 1)]
#prints the coords of the current connector
print self.MainCanvas.coords(len(itemlist) + a)
#appends that connector to a list
itemsconnectors.append(a)
print itemsconnectors
#runs loop for the amount of nodes on screen
for o in range(len(self._object_data)):
#LinkedItems.append(Search(self._object_data[d], a))
#checks if each node is connected to current connector
LinkedItems.append(Search(a))
else:
print 'No Connectors'
#print LinkedItems
#print itemlist
#print list(self.MainCanvas.gettags(self.MainCanvas.find_closest(event.x, event.y)))
#______________________________________________________________________________________________________________________________________________________________________
#This clears the dictionary once the mouse button has been released
def OnButtonRelease(self, event):
'''End drag of an object'''
# reset the drag information
self._drag_data["item"] = None
self._drag_data["x"] = 0
self._drag_data["y"] = 0
#______________________________________________________________________________________________________________________________________________________________________
def OnMotion(self, event):
b = len(self._object_data) + a
'''Handle dragging of an object'''
# compute how much this object has moved
delta_x = event.x - self._drag_data["x"]
delta_y = event.y - self._drag_data["y"]
# move the object the appropriate amount
self.MainCanvas.move(self._drag_data["item"], delta_x, delta_y)
#self.MainCanvas.coords(b, 10, 10 ,100 ,100)
# record the new position
self._drag_data["x"] = event.x
self._drag_data["y"] = event.y
#______________________________________________________________________________________________________________________________________________________________________
def Delete_Object(self):
global IPvar
temp = IPvar
#deletes all the objects on the canvas
self.MainCanvas.delete('all')
#This dictionary is used to keep track of an item being dragged
self._drag_data = {"x": 0, "y": 0, "item": None}
#This dictionary is used to keep track of an item having it's state changed
self._state_change = {"item": None, "tag": "PCchange1", "colour": "Black"}
#This dictionary is used to keep track of the items being connected
self._connector = {"connector": None, "item": None, "item2": None, "x": 0, "y": 0, "x2": 0, "y2": 0, "tag": "False"}
self._data_store = {"item": None, "tag": self._state_change["tag"]}
#______________________________________________________________________________________________________________________________________________________________________
def ColourChange(self, event):
#sets the key "item" in the _state_change dictionaryto be equal to the object closest to the mouse
self._state_change["item"] = self.MainCanvas.find_closest(event.x, event.y)[0]
#a set of if statements to check what the current object colour is and change it depending on its colour
if self._state_change["colour"] == "Black":
self._state_change["colour"] = "Red"
#changes the tag of the object to reflect what colour it is
#this will then be used to set the PC to be either a sender, receiver or a router
self._state_change["tag"] = "PCchange2"
elif self._state_change["colour"] == "Red":
self._state_change["colour"] = "Blue"
self._state_change["tag"] = "PCchange3"
elif self._state_change["colour"] == "Blue":
self._state_change["colour"] = "Black"
self._state_change["tag"] = "PCchange1"
#an else for error checking. incase none of the if statements work
else:
print "Error"
#sets the tags of the objects again to compensate for the tag change in the if statements previously
#tag = ["PCdrag", self._state_change["count"], self._state_change["tag"], "ColourSwitch", self._connector["tag"]]
#tag = ["PCdrag", self._state_change["tag"], "ColourSwitch", self._connector["tag"]]
#configures the items to change the colour and the tags of the items accordingly
self.MainCanvas.itemconfig(self._state_change["item"], fill = self._state_change["colour"])
#print self.MainCanvas.gettags(self.MainCanvas.find_closest(event.x, event.y))
#______________________________________________________________________________________________________________________________________________________________________
class DragItem:
#Constructor
#Initiates when the class is called
#all the arguements are passed through
#the aruements have pre-set values that can be over written incase the program doesnt get passed anything
def __init__(self, window, width=100, height=100, colour="black", x_start=0, y_start=0, node = 5):
#window variables
self.window = window
tag = "circle-%d" % id(self)
#calls a method to create the computer object
self.circle = self.window.CreateComputer(x_start, y_start, colour, tag)
self.circle_text = self.window.CreateText(x_start, y_start, node, tag)
class Connector:
#Constructor
#Initiates when the class is called
#all the arguements are passed through
#the aruements have pre-set values that can be over written incase the program doesnt get passed anything
def __init__(self, window):
#window variables
self.window = window
self.window.ChangeClick()
你可以使用canvas.coords（）方法重新定義行的點（http://effbot.org/tkinterbook/canvas.htm） – 2015-03-31 18:41:45
是的，我用過。對不起，我不夠清楚。我遇到的問題是我無法獲取連線的物體的座標。所以當我移動一個物體並連接一條線時，我需要它能夠找到第二個物體的座標以便移動這條線。 – AaronH 2015-04-03 00:39:28
我認爲釋放按鈕時調用的函數中的'event'應該包含您拖動的對象的新座標。 – 2015-04-03 00:52:58