动态创建小部件pythontkinter并在画布中添加滚动条

Question

我是Python和stackoverFlow的新手。 我正在尝试从输入第一列CSV文件自动创建复选框小部件。我怎样才能使滚动条在正确的位置。下面的图片在输入CSV文件前，滚动条在正确的位置

enter image description here

下图输入CSV文件后，复选框窗口小部件无法滚动

enter image description here

使用Python3.5编写代码

import tkinter as tk
from tkinter import ttk
import start
from tkinter.filedialog import askopenfilename
import numpy as np
import pandas as pd

LARGE_FONT=("Verdana", 12)

class MainPage(tk.Frame):
"""docstring for MainPage"""
def __init__(self, parent,controller):
    tk.Frame.__init__(self,parent)
    self.controller = controller
    self.getColumn = []
    self.createWidgets()


def createWidgets(self):
    self.createPanel()

def createPanel(self):
    nb = ttk.Notebook(self)
    nb.grid(row=1,column=0,columnspan=50,rowspan=49,sticky="NEWS")
    self.createMainPageTab(nb)
    self.createClassifyTab(nb)


def createMainPageTab(self,nb):
    self.featureSelection = tk.IntVar()

    page1 = ttk.Frame(nb)
    nb.add(page1,text="Preprocessing")

    selectFileFrame = tk.LabelFrame(page1,text = "Select File")
    selectFileFrame.grid(row=0,column=0,sticky="W",padx=5,pady=5,ipady=5,columnspan=10)

    selectRoleFrame = tk.LabelFrame(page1,text = "select Role")
    selectRoleFrame.grid(row=1,column=0,sticky="W",padx=5,pady=5,ipady=5,columnspan=1,rowspan=1)

    text = tk.Label(selectFileFrame,text="Select The File")
    text.grid(row=0,column=0, sticky="E")

    textSelectFile = tk.Text(selectFileFrame,width = 20, height = 1)
    textSelectFile.grid(row=0,column=1,sticky="WE",pady=3,padx=5)

    buttonSelectFile = tk.Button(selectFileFrame,text="browse...",command=lambda : self.load_file(textSelectFile,frameCheckBox))
    buttonSelectFile.grid(row=0,column=2,sticky="w")

    checkButtonFeatureSelection = tk.Checkbutton(selectFileFrame, text= "Feature Selection",variable = self.featureSelection)
    checkButtonFeatureSelection.grid(row=1,column=0,sticky="w") 

    buttonCek = tk.Button(selectFileFrame, text='Show', command= lambda : self.var_states())
    buttonCek.grid(row=2,column=0,sticky="W")


    #create canvas for scroll bar 
    canvasScroll = tk.Canvas(selectRoleFrame,bg="Yellow")
    canvasScroll.grid(row=0,column=0)

    vBar = tk.Scrollbar(selectRoleFrame,orient="vertical",command=canvasScroll.yview)
    vBar.grid(row=0,column=1, sticky="ns")
    canvasScroll.configure(yscrollcommand=vBar.set)

    frameCheckBox = tk.Frame(canvasScroll,bg="blue",bd=2,relief=tk.GROOVE)
    canvasScroll.create_window((0,0), window=frameCheckBox,anchor="nw")

    frameCheckBox.bind("<Configure>",self.resize(canvasScroll))


def resize(self,canvasScroll): 
    canvasScroll.configure(scrollregion=canvasScroll.bbox("all"),width=235,height=90)   


def readingCsv(self,fname):
    readCsv = pd.read_csv(fname)
    return readCsv

#event input csv file
def load_file(self,textSelectFile,frameCheckBox):
    fname = askopenfilename(filetypes=(("*.csv","Template files"),
                                       ("HTML files", "*.html;*.htm"),
                                       ("All files", "*.*") ))
    print(fname)
    mlabel = tk.Label(self,text="%s" % fname)
    mlabel.grid(row=0,column=3)
    # getText=self.textSelectFile.get()
    textSelectFile.configure(state=tk.NORMAL)
    textSelectFile.delete(1.0,tk.END)
    textSelectFile.insert(tk.END,fname)
    textSelectFile.configure(state=tk.DISABLED)
    read = self.readingCsv(fname)
    self.getColumn = self.getColumnFromCsv(read)
 #create checkbox
    if self.getColumn:
        for Column in self.getColumn:
            v = tk.StringVar()
            l = tk.Checkbutton(frameCheckBox,text=Column,variable=v)
            l.grid(sticky="w")


def getColumnFromCsv(self,readCsv):
    numeric_variables = list(readCsv.dtypes[readCsv.dtypes != "object"].index)
    return numeric_variables

def var_states(self):
    alabel = tk.Label(self,text="%s" % self.featureSelection.get())
    alabel.grid(row=3,column=0)
    print("tes : %d" %(self.featureSelection.get()))    

def feature_selection(self,chcekFeatureSelection):
    if self.featureSelection.get() == 1:
        pass



def createClassifyTab(self,nb):
    page2 = ttk.Frame(nb)
    nb.add(page2,text="Classify")

Answer 1

你有

frameCheckBox.bind("<Configure>",self.resize(canvasScroll))

也就是说

^{pr2}$

所以您并没有赋值函数，而是执行了resize并分配了它的结果。在

但是resize返回None，所以最后你得到了

frameCheckBox.bind("<Configure>", None)

bind()（类似于command=）需要回调-它表示没有()和参数的函数名-如下所示

frameCheckBox.bind("<Configure>", self.resize)

因为您想发送额外的参数（默认情况下跳过event发送），所以必须使用lambda

frameCheckBox.bind("<Configure>", lambda event: self.resize(canvasScroll))