使 tkinter 窗口缩小，因为小部件被删除

Question

我正在制作一些程序，在其中我将一堆东西输入到一个条目中，然后将其打印成一行。我还添加了一个可以删除行的功能。但是，当我删除一行时，窗口不会缩小。我实际制作程序的方式是有 2 帧；带有按钮和条目的主框架，以及输出或文本框架。当我删除一行时，它实际上是从列表中追加数据，删除框架和所有小部件并重新打印行，但没有我删除的行。

我的代码的问题是，当我删除一行时，未删除的行开始变小并压缩，其次，窗口底部不会向上移动，留下空白区域。

任何帮助将不胜感激，谢谢。

实际上附加、标记和打印行在函数 append_entry() 中，我的删除函数是 delete_row()

from tkinter import *


global main_window

def quit():
    main_window.destroy()


def entry_labels():
    leader_label = Label(main_frame, text = 'Customer Name')
    leader_label.grid(column=0, row=0)

    location_label = Label(main_frame, text = 'Receipt Number')
    location_label.grid(column=0, row=1)

    numcampers_label = Label(main_frame, text = 'Item Hired')
    numcampers_label.grid(column=0, row=2)

    weather_label = Label(main_frame, text = 'Number Hired')
    weather_label.grid(column=0, row=3)


    row_label = Label(main_frame, text= 'Row')
    row_label.grid(column=3, row=2)

def button():
    print_button = Button(main_frame, text = "Print Details", command = append_entry)
    print_button.grid(column=3, row=1)

    quit_button = Button(main_frame, text= "Quit", command=quit)
    quit_button.grid(column=4, row=0)

    delete_row_button = Button(main_frame, text = 'Delete Row', command = delete_row)
    delete_row_button.grid(column=4, row=3)
    


def entry():
    global name_entry
    name_entry = Entry(main_frame)
    name_entry.grid(column=1, row=0)

    global receipt_entry
    receipt_entry = Entry(main_frame)
    receipt_entry.grid(column=1, row=1)

    global hired_entry
    hired_entry = Entry(main_frame)
    hired_entry.grid(column=1, row=2)

    
    global num_hired_entry
    num_hired_entry = Entry(main_frame)
    num_hired_entry.grid(column=1, row=3)

    global delete_row_entry
    delete_row_entry = Entry(main_frame)
    delete_row_entry.grid(column=4, row=2)

def table_headers():
    row_header = Label(main_frame, text='Row', font = 'Arial 10 bold')
    row_header.grid(column=0, row=4)
    
    customer_header = Label(main_frame, text='Customer Name', font = 'Arial 10 bold')
    customer_header.grid(column=1, row=4)

    receipt_header = Label(main_frame, text='Receipt Number', font = 'Arial 10 bold')
    receipt_header.grid(column=3, row=4)

    item_header = Label(main_frame, text='Item Hired', font = 'Arial 10 bold')
    item_header.grid(column=2, row=4)

    num_header = Label(main_frame, text='Number Hired', font = 'Arial 10 bold')
    num_header.grid(column=4, row=4)

def append_entry():

    
    global second_frame
    second_frame = Frame(main_window)
    second_frame.grid(column=0, row=6)

    leader_error_var.set("")
    location_error_var.set("")
    numcamper_error_var.set("")
    weather_error_var.set("")


    global name_count
    name_count = 0
    global ROWS_ABOVE
    ROWS_ABOVE = 6


    try:
        name_entry_str = str(name_entry.get())
        hired_entry_str = str(hired_entry.get())
        receipt_entry_int = str(receipt_entry.get())
        num_hired_entry_int = str(num_hired_entry.get())



        if len(name_entry.get()) != 0:
            input_data_col1.append([name_entry_str])
            input_data_col2.append([hired_entry_str])
            input_data_col3.append([receipt_entry_int])
            input_data_col4.append([num_hired_entry_int])
            counters['total_entries'] += 1
      

        
        print(input_data_col1)
        print(input_data_col2)
        print(input_data_col3)
        print(input_data_col4)
        
       
        while name_count < counters ['total_entries']:
            global name

            name = Label(second_frame, text=(input_data_col1[name_count][-1]))  ##using -1 selects the latest entry in the list
            name.grid(column=1, row=name_count + ROWS_ABOVE, padx=50)
            
            item = Label(second_frame, text=(input_data_col2[name_count][-1]))
            item.grid(column=2, row=name_count + ROWS_ABOVE, padx=50)
            
            row = Label(second_frame, text=name_count)
            row.grid(column=0, row=name_count + ROWS_ABOVE, padx=60)
            
            receipt = Label(second_frame, text=(input_data_col3[name_count][-1]))
            receipt.grid(column=3, row=name_count + ROWS_ABOVE, padx=50)
            
            num = Label(second_frame, text=(input_data_col4[name_count][-1]))
            num.grid(column=4, row= name_count + ROWS_ABOVE, padx=50)
            
            name_count += 1

        name_entry.delete(0,END)
        receipt_entry.delete(0,END)
        hired_entry.delete(0,END)
        num_hired_entry.delete(0,END)

    except:
        leader_error_var.set("Check inputs")
        #location_error_var.set("please enter a valid num")
        #numcamper_error_var.set("numcamper error test")
        weather_error_var.set("")

        name_entry.delete(0,END)
        receipt_entry.delete(0,END)
        hired_entry.delete(0,END)
        num_hired_entry.delete(0,END)



def delete_row():

    user_del =int(delete_row_entry.get())
     
    counters['total_entries'] -= 1
    input_data_col1.pop(user_del)
    input_data_col2.pop(user_del)
    input_data_col3.pop(user_del)
    input_data_col4.pop(user_del)


    data = [input_data_col1,input_data_col2,input_data_col3,input_data_col4]

    

    for widget in second_frame.winfo_children():
        widget.destroy()

    append_entry()

    
    print(input_data_col1)
    print(input_data_col2)
    print(input_data_col3)
    print(input_data_col4)

     

def error_prevention():
    #leader_error_var.set("leader error test")
    #location_error_var.set("location error test")
    #numcamper_error_var.set("numcamper error test")
    #weather_error_var.set("weather error test")
    #weather_error_var.set("_______________")

    
    leader_error = Label(main_frame, textvariable = leader_error_var, fg = 'red')
    leader_error.grid(column=2, row=0)

    location_error = Label(main_frame, textvariable = location_error_var, fg = 'red')
    location_error.grid(column=2, row=1)

    numcamper_error = Label(main_frame, textvariable = numcamper_error_var, fg = 'red', width = 13)
    numcamper_error.grid(column=2, row=2)
    
    weather_error = Label(main_frame, textvariable = weather_error_var, fg = 'red')
    weather_error.grid(column=2, row=3)


def main():
    global main_window
    main_window = Tk()


    global input_data_col1
    input_data_col1 = []
    
    global input_data_col2
    input_data_col2 = []
    
    global input_data_col3
    input_data_col3 = []
    
    global input_data_col4
    input_data_col4 = []



    global input_data


    input_data = []
    
    global main_frame
    main_frame = Frame(main_window)
    main_frame.grid(row=0,column=0)
    
  
    

    global counters
    counters = {'total_entries':0, 'name_count':0}
    #global number
    #number = {'total_entries':0}

    def stringvars():
        global location_error_var
        location_error_var = StringVar()
        location_error_var.set("")

        global numcamper_error_var
        numcamper_error_var = StringVar()
        numcamper_error_var.set("")

        global leader_error_var
        leader_error_var = StringVar()
        leader_error_var.set("")

        global weather_error_var
        weather_error_var = StringVar()
        leader_error_var.set("")

    stringvars()
    
    entry_labels()
    entry()
    error_prevention()
    button()
    table_headers()


main()
main_window.mainloop()

Answer 1

代码下

    for widget in second_frame.winfo_children():
        widget.destroy()

添加这段代码

        second_frame.pack()

会是这样的

    for widget in second_frame.winfo_children():
        widget.destroy()
        second_frame.pack()

希望对你有帮助

Answer 2

你可以使用 main_window.geometry("1200x800+100+100") 更改main_window 的大小和位置。此处窗口宽度为 1200，高度为 800，位于屏幕左上角 100 像素处。 +100+100 是可选的。

您可以将geometry() 添加到delete_row 回调以调整框架大小。虽然您可能必须在小部件删除后计算正确的大小。

至于“当我删除一行时，未删除的行开始变小压缩”，

这是由于网格布局的工作原理。如果同一网格行上有两个小部件，则网格高度将等于较高的小部件高度。当较高的小部件被移除时，网格将调整到较小的小部件高度并显示为“缩小”。

要解决这个问题，你可以尝试给小部件添加填充，语法是

widget.grid(column=1,row=1,padx=(10,10),pady=(10,10))

或者，您可以尝试其他布局管理：.place 会给您绝对的布局控制。或者你可以使用pack 让 tkinter 决定合适的位置。