Tkinter 入口和按钮组合功能在其他功能中不起作用

Question

我创建了一个调用具有多个条目和一个按钮的 GUI 的函数。如果我按下按钮，条目上的值将在函数上 returned。

def date_time_gui ():
    win = tk.Tk()
    win.title('powered by Python') # win title
    win.geometry('700x400') # size of win

    # add label on the win
    label = tk.Label(win, 
        text='type the heaving datetime and out water datetime',
        font = ('Arial Bold',25)
        )
    label.place(relx = 0.5, rely = 0.05, anchor = 'n')

    # label and entry for heaving datetime
    heaving_label = tk.Label(win,
        text='type heaving datetime',
        font = ('Arial Bold', 15)
        )
    heaving_label.place(relx = 0.1, rely = 0.3, anchor = 'w')

    h_year_label = tk.Label(win, text='YEAR (4 digits) :')
    h_year_label.place(relx = 0.1, rely = 0.4, anchor = 'w')
    h_year = tk.Entry(win, fg='black', width = 5)
    h_year.place(relx = 0.3, rely = 0.4, anchor = 'w')


    h_month_label = tk.Label(win, text='MONTH (2 digits) :')
    h_month_label.place(relx = 0.1, rely = 0.5, anchor = 'w')
    h_month = tk.Entry(win, fg='black', width = 5)
    h_month.place(relx = 0.3, rely = 0.5, anchor = 'w')


    h_date_label = tk.Label(win, text='DATE (2 digits) :')
    h_date_label.place(relx = 0.1, rely = 0.6, anchor = 'w')
    h_date = tk.Entry(win, fg='black', width = 5)
    h_date.place(relx = 0.3, rely = 0.6, anchor = 'w')


    h_hour_label = tk.Label(win, text='HOUR (24h, 2 digits) :')
    h_hour_label.place(relx = 0.1, rely = 0.7, anchor = 'w')
    h_hour = tk.Entry(win, fg='black', width = 5)
    h_hour.place(relx = 0.3, rely = 0.7, anchor = 'w')

    h_minute_label = tk.Label(win, text='MINUTE (2 digits) :')
    h_minute_label.place(relx = 0.1, rely = 0.8, anchor = 'w')
    h_minute = tk.Entry(win, fg='black', width = 5)
    h_minute.place(relx = 0.3, rely = 0.8, anchor = 'w')



    # label and entry for out water datetime
    outwater_label = tk.Label(win,
        text='type out water datetime',
        font = ('Arial Bold', 15)
        )
    outwater_label.place(relx = 0.5, rely = 0.3, anchor = 'w')

    o_year_label = tk.Label(win, text='YEAR (4 digits) :')
    o_year_label.place(relx = 0.5, rely = 0.4, anchor = 'w')
    o_year = tk.Entry(win, fg='black', width = 5)
    o_year.place(relx = 0.7, rely = 0.4, anchor = 'w')


    o_month_label = tk.Label(win, text='MONTH (2 digits) :')
    o_month_label.place(relx = 0.5, rely = 0.5, anchor = 'w')
    o_month = tk.Entry(win, fg='black', width = 5)
    o_month.place(relx = 0.7, rely = 0.5, anchor = 'w')


    o_date_label = tk.Label(win, text='DATE (2 digits) :')
    o_date_label.place(relx = 0.5, rely = 0.6, anchor = 'w')
    o_date = tk.Entry(win, fg='black', width = 5)
    o_date.place(relx = 0.7, rely = 0.6, anchor = 'w')


    o_hour_label = tk.Label(win, text='HOUR (24h, 2 digits) :')
    o_hour_label.place(relx = 0.5, rely = 0.7, anchor = 'w')
    o_hour = tk.Entry(win, fg='black', width = 5)
    o_hour.place(relx = 0.7, rely = 0.7, anchor = 'w')

    o_minute_label = tk.Label(win, text='MINUTE (2 digits) :')
    o_minute_label.place(relx = 0.5, rely = 0.8, anchor = 'w')
    o_minute = tk.Entry(win, fg='black', width = 5)
    o_minute.place(relx = 0.7, rely = 0.8, anchor = 'w')

    def run_func ():
        global heaving
        global outwater
        heaving = h_year.get()+'.'+h_month.get()+'.'+h_date.get()+' '+h_hour.get()+' '+h_minute.get()
        outwater = o_year.get()+'.'+o_month.get()+'.'+o_date.get()+' '+o_hour.get()+' '+o_minute.get()
        print('here')
        win.destroy()
        print('there')
        return heaving, outwater
    print('else')
    button = ttk.Button(win, text = 'run', command = run_func)  
    button.place(relx = 0.8, rely = 0.9, anchor = 'w')
    print('this')
    win.mainloop()
    print('where')
    return heaving, outwater

如果我在同一个脚本中使用以下代码运行它就可以工作。

if __name__ == "__main__":
    h, o = date_time_gui()
    print(h,o)

它打印出 h, o 是函数 date_time_gui

的 return 值

但是，如果我将此函数应用于其他定义，例如

def other_def():
    ## some code
    heaving_datetime, out_water_datetime = date_time_gui()

它只是停止工作。

我想检查date_time_gui中哪一行有问题，所以我打印了'there'、'where'等

当我运行 other_def时，它打印出来别的这个这里那里

然后没有打印出来'where'

我真的不知道是什么问题，因为 date_time_gui 函数本身运行良好。当我将此应用于其他功能时，它不起作用。

也许，为了运行 other_def 我制作了一个带有复选框的 gui 运行 other_def。所以，如果我检查 gui 上的 other_def 功能并点击运行按钮，gui 将被破坏并且 other_def 将是运行。 date_time_gui 的新 gui 弹出并点击运行按钮，然后 gui 销毁并停止工作。

Answer 1

使用 tkinter window

调用 loop() 方法会激活 tkinter 消息泵并将停止线性 python 代码，直到 window 关闭
您可以通过手动关闭 window 或从代码中调用 quit() 来退出循环。

在你的例子中，调用 win.mainloop() 停止了线性脚本。

您可以通过将 win.quit() 添加到 run_func 函数来退出循环。

试试这个代码：

    def run_func ():
        global heaving
        global outwater
        heaving = h_year.get()+'.'+h_month.get()+'.'+h_date.get()+' '+h_hour.get()+' '+h_minute.get()
        outwater = o_year.get()+'.'+o_month.get()+'.'+o_date.get()+' '+o_hour.get()+' '+o_minute.get()
        print('here')
        win.destroy()
        print('there')
        win.quit()   # exit gui loop
        return heaving, outwater  # not needed
    
    print('else')
    button = ttk.Button(win, text = 'run', command = run_func)  
    button.place(relx = 0.8, rely = 0.9, anchor = 'w')
    print('this')
    win.mainloop()  # python code stops here until window closed
    print('where')
    heaving, outwater = 3,4  # for testing
    return heaving, outwater

if __name__ == "__main__":
    h, o = date_time_gui()
    print(h,o)

输出

else
this
here
there
where
3 4

Tkinter 入口和按钮组合功能在其他功能中不起作用

Tkinter entry and button combined function doesn't work in other function

python

tk

tkinter